Washing pump and dishwasher

Abstract

The utility model discloses a kind of washing pump and dishwasher, the washing pump includes: pump shell;Heating assembly, at least a part of heating assembly is located in pump shell, heating assembly includes the first inner wall surface distributed along the radial direction of washing pump and the first outer wall surface around the first inner wall surface, liquid inlet flow channel is structured in the first inner wall surface, liquid outlet flow channel is structured between the first outer wall surface and pump shell;Impeller, impeller is oppositely arranged with heating assembly along the axial direction of washing pump, impeller is rotatable to drive fluid from liquid inlet flow channel to liquid outlet flow channel;Motor, motor is connected with pump shell, motor is configured to drive impeller rotation, wherein, heating assembly further includes cover body part, cover body part extends the first outer wall surface along radial direction and covers the end of pump shell away from impeller. According to the washing pump of the utility model embodiment, by impeller and heating assembly along the axial arrangement of impeller, improve the heating efficiency of heating assembly, and simplify the structure of washing pump, reduce the occupied space of washing pump.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and in particular to a washing pump and a dishwasher. Background Technology

[0002] The washing pump is a core component in washing equipment such as dishwashers, providing power for the entire circulating water circuit. After being pressurized by the washing pump, the fluid is forced into a jet or flow state, spraying and rinsing the items inside the washing equipment to achieve cleaning and stain removal. In related technologies, washing pumps integrate heating elements; however, the heating efficiency of these elements is relatively low. To improve the washing effect of the equipment, higher requirements are placed on the energy consumption and heating efficiency of the washing pump. Utility Model Content

[0003] One objective of this invention is to provide a washing pump and dishwasher that simplifies the structure of the washing pump and reduces the space occupied by the washing pump.

[0004] A washing pump according to an embodiment of the present invention includes: a pump housing; a heating assembly, at least a portion of which is disposed within the pump housing, the heating assembly including a first inner wall surface radially distributed along the washing pump and a first outer wall surface surrounding the first inner wall surface, an inlet channel being formed within the first inner wall surface and an outlet channel being formed between the first outer wall surface and the pump housing; an impeller, the impeller being arranged opposite to the heating assembly along the axial direction of the washing pump, the impeller being rotatable to drive fluid from the inlet channel to the outlet channel; and a motor connected to the pump housing, the motor being configured to drive the impeller to rotate. The heating assembly further includes a cover portion extending radially from the first outer wall surface and covering the end of the pump housing away from the impeller.

[0005] According to the embodiments of the present invention, the washing pump improves the heating efficiency of the heating component and simplifies the structure of the washing pump by arranging the impeller and heating component along the axial direction of the impeller, thereby reducing the space occupied by the washing pump.

[0006] In addition, the washing pump according to the above embodiments of the present invention may also have the following additional technical features:

[0007] In some embodiments, the cover portion covers the outside of the pump housing along the axial direction, and the cover portion is fixedly connected to the pump housing.

[0008] In some embodiments, the pump housing includes a positioning portion that protrudes from the second inner wall surface of the pump housing, and the cover portion is disposed outside the positioning portion and fixedly connected to the positioning portion.

[0009] In some embodiments, the positioning part is provided with a first sealing groove, and the washing pump further includes a first sealing ring disposed in the first sealing groove and sealingly fitted with the cover part.

[0010] In some embodiments, the pump casing is provided with a baffle at its end, and the cover portion is located inside the baffle.

[0011] In some embodiments, the motor includes a housing connected to the other end of the pump housing, and the impeller is disposed between the housing and the pump housing along the axial direction.

[0012] In some embodiments, the second outer wall surface of the pump housing is provided with a first fastening position, and the cover is provided with a second fastening position, wherein the first fastening position and the second fastening position are rotatably fastened together.

[0013] In some embodiments, the housing includes a positioning protrusion and a mating portion, the positioning protrusion being opposite to the pump housing along the axial direction, and the mating portion being located on the inner periphery of the housing.

[0014] In some embodiments, the inner circumferential surface of the other end of the pump housing is provided with a first notch, and the washing pump further includes an end cap that covers the other end of the pump housing, with the periphery of the end cap positioned between the bottom surface of the first notch and the mating part; and / or, the outer circumferential surface of the mating part is provided with a second sealing groove, and the washing pump further includes a second sealing ring disposed in the second sealing groove and sealingly mating with the inner surface of the pump housing.

[0015] In some embodiments, the heating assembly has a mating groove at its end facing the impeller, and the impeller has an annular rib around its liquid inlet, with at least a portion of the annular rib extending into the mating groove to form a labyrinth seal structure.

[0016] In some embodiments, the inner side of the annular rib is provided with a second notch, and at least a portion of the periphery of the outlet end of the liquid inlet channel is provided in the second notch.

[0017] In some embodiments, the inlet of the impeller is opposite to the inlet channel along the axial direction, and the inlet gradually widens in a direction away from the inlet channel along the axial direction; and / or, the ratio of the radial dimension of the impeller to the radial dimension of the first outer wall surface is greater than or equal to 0.9 and less than or equal to 1.1; and / or, the position of the outlet of the impeller extending radially is opposite to the outlet channel along the axial direction.

[0018] In some embodiments, the impeller includes: a first end plate opposite to the heating assembly along the axial direction; a second end plate opposite to the first end plate along the axial direction; a plurality of blades disposed between the first end plate and the second end plate, wherein the gap between the first end plate and the heating assembly gradually widens radially outward; and / or, the first end plate gradually tilts toward the second end plate in the radially outward direction.

[0019] In some embodiments, the sidewall of the pump housing is provided with a communication port, and the washing pump further includes a liquid outlet pipe that connects to the periphery of the communication port and extends radially away from the pump housing.

[0020] The dishwasher according to an embodiment of the present invention includes the aforementioned washing pump. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the washing pump according to an embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional view of the washing pump according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A magnified view of a portion of area A in the middle circle.

[0024] Figure 4 yes Figure 2 A magnified view of a portion of region B in the middle circle.

[0025] Figure 5 yes Figure 2 A magnified view of a portion of region C in the middle circle.

[0026] Figure 6 This is a schematic diagram of the heating assembly of the washing pump according to an embodiment of the present invention.

[0027] Figure 7 This is a top view of the washing pump according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the impeller of the washing pump according to an embodiment of the present invention.

[0029] Figure 9 This is a cross-sectional view of the impeller of the washing pump according to an embodiment of the present invention.

[0030] Figure 10 This is another cross-sectional view of the impeller of the washing pump according to an embodiment of the present invention.

[0031] Figure label:

[0032] Washing pump 10, inlet channel 101, outlet channel 102, pump housing 11, second inner wall surface 1111, second outer wall surface 1112, positioning part 112, connecting port 113, outlet pipe 114, baffle 115, heating assembly 12, first inner wall surface 1211, first outer wall surface 1212, mating groove 1213, outer shell part 122, inner tube part 123, heating part 124, terminal block 125, cover part 126, impeller 13, first end plate 131, second end plate 132, blade 133, annular rib 134, motor 14, cover 141, positioning protrusion 1411, mating part 1412, first snap-fit ​​1421, second snap-fit ​​1422, first sealing ring 151, second sealing ring 152, first notch groove 153, second notch groove 154, cover plate 155. Detailed Implementation

[0033] A dishwasher is an electrically powered appliance that uses water or a detergent solution as its primary medium to wash and dry household tableware such as bowls, plates, glasses, and spoons. It can be operated safely without professional training. Dishwashers offer significant advantages in terms of freeing up your hands, energy conservation, environmental protection, and effective washing and sterilization.

[0034] As a core component of the dishwasher, the washing pump is responsible for powering the entire water circulation circuit. The performance and energy efficiency of the washing pump directly affect the dishwasher's washing efficiency, energy consumption, vibration, noise, and other intuitive aspects. With increasing user demands, washing pumps need to meet requirements such as high flow rate, high pressure, high efficiency, low energy consumption, low noise, small size, and high integration. This places high technical demands on the design of washing pumps.

[0035] In related technologies, there is a risk of water leakage at the connection between the heating element and the pump housing of the dishwasher; the heating element is fixed on the pump housing as a separate component, which affects the efficiency of the pump; the dishwasher has a small contact area with the water flow, resulting in low heating efficiency.

[0036] This invention designs a novel high-pressure washing pump for dishwashers. The overall structure differs from existing products on the market, and its performance indicators are significantly improved. It can simultaneously meet the performance requirements of ECO mode and quick wash mode, maintaining extremely high hydraulic efficiency in multiple modes. The compact structural design, integrated with the heating system, further reduces the overall size of the machine. This invention mainly relates to the installation and fit between the heating component and the pump housing; the dimensional relationship of the heating component; the installation and fit between the heating component and the washing pump and motor; and the structure of the impeller used in the dishwasher pump.

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] This utility model provides a washing pump 10, which can be used in washing equipment such as dishwashers and washing machines. This application mainly uses the application of the washing pump 10 in a dishwasher as an example for illustration, which is not a limitation on the protection scope of this utility model.

[0039] like Figures 1 to 10 The washing pump 10 according to an embodiment of the present utility model includes: a pump housing 11, a heating assembly 12, an impeller 13, and a motor 14.

[0040] At least a portion of the heating assembly 12 is disposed within the pump housing 11. The heating assembly 12 includes a first inner wall surface 1211 and a first outer wall surface 1212, which are radially distributed along the washing pump 10. The first outer wall surface 1212 surrounds the first inner wall surface 1211. An inlet channel 101 is formed within the first inner wall surface 1211, and an outlet channel 102 is formed between the first outer wall surface 1212 and the pump housing 11. The heating assembly 12 is used to heat the fluid within the inlet channel 101 and the outlet channel 102. The heating assembly 12 can simultaneously heat the fluid in the inlet channel 101 and the outlet channel 102. The outlet channel 102 is arranged around the inlet channel 101. Only one heating assembly 12 is needed to simultaneously exchange heat between the fluids in both channels, improving the heating efficiency of the heating assembly 12 and simplifying the structure of the washing pump 10. Furthermore, the outlet channel 102 is located between the heating assembly 12 and the pump housing 11, making the washing pump 10 more compact and improving its space utilization. The impeller 13 and the heating assembly 12 are arranged axially along the washing pump 10. The impeller 13 can rotate to drive the fluid from the inlet channel 101 to the outlet channel 102. The impeller 13 and the heating assembly 12 are arranged axially along the impeller 13 to improve the compactness of the washing pump 10 structure. The impeller 13 includes an inlet opposite to the inlet channel 101 and an outlet communicating with the outlet channel 102. The impeller 13 is configured to drive fluid from the inlet to the outlet. Under the guiding effect of the inlet channel 101, the fluid is stably input into the impeller 13 through the inlet channel 101. The pressurized fluid flows directly into the outlet channel 102 through the outlet, avoiding eddies or uneven flow velocity that could lead to uneven heating, and further improving the heating efficiency of the heating assembly 12. The motor 14 is connected to the pump casing 11 and is configured to drive the impeller 13 to rotate.

[0041] like Figure 2The diagram shows the axial cross-section of the washing pump 10 of this invention. The pump has two main functions: heating the water flowing through it and pressurizing it. The specific workflow is as follows: Water enters the pump body from the inner tube 123 of the washing pump 10, first contacting the first inner wall surface 1211 of the inner tube 123 and receiving initial heating; then it enters the interior of the rotating impeller 13, where the motor 14 drives the impeller 13 to rotate. The water is thrown out of the impeller 13 by the centrifugal force generated by the rotation of the impeller 13, a process known as pressurization; the water flowing out from the impeller 13 flows through the first outer wall surface 1212 of the heating assembly 12 and receives secondary heating before finally flowing out, thus simultaneously achieving the functions of heating and pressurizing the water.

[0042] According to the present invention, the washing pump 10 has an impeller 13 and a heating assembly 12 arranged along the axial direction of the impeller 13, which improves the heating efficiency of the heating assembly 12 and simplifies the structure of the washing pump 10, reducing the space occupied by the washing pump 10. At the same time, a sealing structure is provided in the gap between the impeller 13 and the heating assembly 12 to reduce the backflow of fluid from the liquid outlet channel 102 to the liquid inlet of the impeller 13, thereby improving the volumetric efficiency of the washing pump 10.

[0043] like Figures 1 to 10 In some embodiments, the heating assembly 12 includes a cover portion 126 that extends radially out of a first outer wall surface and covers the end of the pump housing 11 away from the impeller 13. Covering one end of the pump housing 11 with the heating assembly 12 simplifies the structure of the washing pump 10 and increases the contact area between the fluid and the heating assembly 12, thereby improving the heating efficiency and effect on the fluid.

[0044] Combination Figures 2 to 5 In conjunction with the foregoing embodiments, the heating assembly 12 includes an inner tube portion 123, an outer shell portion 122, and a heating portion 124. The inner tube portion 123 may be a straight tube, and the outer shell portion 122 may include an outer tube portion. The outer tube portion may be arranged around the inner tube portion 123 and may be a circular tube coaxial with the inner tube portion 123. One end of the outer tube portion is provided with a first flange portion extending away from the inner tube portion 123. The first flange portion may be stacked on the end of the pump housing 11. The outer edge of the first flange portion is provided with a second flange portion extending away from the pump housing 11. The other end of the outer tube portion is provided with a second flange portion extending towards the inner tube portion 123. A cavity is formed between the outer shell portion 122 and the inner tube portion 123, wherein at least a portion of the heating portion 124 may be disposed within the cavity.

[0045] Among them, such as Figure 3The cover portion 126 covers the outside of the pump housing 11 along the axial direction, and the cover portion 126 is fixedly connected to the pump housing 11. This facilitates a stable connection between the cover portion 126 and the pump housing 11, improves the assembly efficiency and effect of the heating component 12 and the pump housing 11, and thus reduces the production cost of the washing pump 10.

[0046] like Figure 3 The pump housing 11 includes a positioning part 112, which protrudes from the second inner wall surface 1111 of the pump housing 11. A cover part 126 is located on the outside of the positioning part 112 and is fixedly connected to the positioning part 112. The cover part 126 may have multiple through holes (e.g., four M4 through holes) distributed circumferentially along the washing pump 10. The positioning part 112 of the pump housing 11 may have multiple threaded inner holes (e.g., four M4 threaded inner holes), each corresponding to one of the through holes. Multiple bolts corresponding to the threaded inner holes are used to position the cover part 126 on the pump housing 11. The threaded inner holes may be blind holes. The washing pump 10 is assembled from the pump housing 11, the motor 14, and the heating assembly 12. The heating assembly 12 is connected to the pump housing 11, rather than being covered within the pump housing 11.

[0047] like Figure 2 and Figure 3 The positioning part 112 is provided with a first sealing groove, and the washing pump 10 also includes a first sealing ring 151 disposed in the first sealing groove and sealingly engaged with the cover part 126. This can improve the sealing performance between the heating component 12 and the pump housing 11, and ensure the pressure resistance of the washing pump 10, thereby improving the stability and safety of the washing pump 10.

[0048] The first sealing groove can be located on the inner edge of the positioning part 112 and face away from the inner cavity of the pump housing 11. When the pump housing 11 and the heating assembly 12 are assembled together, the corner of the cover part 126 and the first outer wall surface can cooperate with the first sealing ring 151 located in the first sealing groove, thereby improving the sealing performance of the connection structure between the heating assembly 12 and the pump housing 11.

[0049] like Figure 2 and Figure 3 In some embodiments, the pump housing 11 is provided with a baffle 115 at its end, and the cover portion 126 is located inside the baffle 115. This allows for stable installation of the heating component 12. In addition, during the assembly process, the baffle 115 can be used to pre-position the heating component 12, thereby improving the assembly efficiency of the heating component 12 and the pump housing 11.

[0050] like Figure 2 and Figure 4In some embodiments, the motor 14 is located at the other end of the pump housing 11, and the impeller 13 is axially disposed between the motor 14 and the pump housing 11. The motor 14 includes a housing 141 connected to the other end of the pump housing 11, and the impeller 13 is axially disposed between the housing 141 and the pump housing 11. The housing 141 can be used to seal the other end of the pump housing 11, thereby enabling quick assembly of the washing pump 10 and sealing the pump cavity within the pump housing 11, facilitating the impeller 13 to drive fluid from the inlet channel 101 to the outlet channel 102.

[0051] like Figure 1 , Figure 2 as well as Figure 4 The pump housing 11 has a first fastening position 1421 on its second outer wall surface 1112, and a second fastening position 1422 on its cover 141. The first fastening position 1421 and the second fastening position 1422 are rotatably fastened together. Optionally, the first fastening position 1421 can be configured as a boss extending circumferentially along the washing pump 10, and the second fastening position 1422 can be configured as a hook extending circumferentially along the washing pump 10. One end of the hook is open along the circumferential direction of the washing pump 10. During the assembly process of the motor 14 and the pump housing 11, the motor 14 can be positioned at the other end of the pump housing 11, so that the open end of the boss and the hook are opposite each other along the circumferential direction of the washing pump 10. Rotating the motor 14 causes the hook to hook onto the boss, thereby realizing the rotatable fastening of the first fastening position 1421 and the second fastening position 1422. The above assembly structure is simple, which can simplify the assembly structure of the washing pump 10 and improve the assembly efficiency of the washing pump 10.

[0052] Optionally, during the assembly of the housing 141, when viewed from the inlet direction of the liquid inlet channel 101, the assembly direction of the motor 14 relative to the pump housing 11 is counterclockwise.

[0053] like Figure 2 and Figure 4 The housing 141 includes a positioning protrusion 1411 and a mating portion 1412. The positioning protrusion 1411 is axially opposite to the pump housing 11, and the mating portion 1412 is located on the inner periphery of the housing 141. This design also improves the assembly efficiency of the housing 141 and the pump housing 11. Furthermore, the shaft hole mating structure between the mating portion 1412 and the pump housing 11 allows for pre-positioning of the motor 14 and the pump housing 11, improving the assembly efficiency and stability of both, and further enhancing the overall assembly efficiency of the housing 141 and the pump housing 11.

[0054] As shown in the figure, the inner circumferential surface of the other end of the pump housing 11 is provided with a first notch 153. The washing pump 10 also includes an end cover, which covers the other end of the pump housing 11. The periphery of the end cover is positioned between the bottom surface of the first notch 153 and the mating part 1412. The mating part 1412 can be used to effectively position the end cover by mating with the bottom surface of the first notch 153. The end cover can be configured to form a pump cavity with the pump housing 11, so as to stably install the impeller 13 in the pump housing 11 and improve the structural stability of the washing pump 10.

[0055] like Figure 2 and Figure 4 The outer peripheral surface of the mating part 1412 is provided with a second sealing groove, and the washing pump 10 also includes a second sealing ring 152 disposed in the second sealing groove and sealingly mating with the inner surface of the pump housing 11. This can improve the sealing performance between the motor 14 and the pump housing 11, and ensure the pressure resistance of the washing pump 10, thereby improving the stability and safety of the washing pump 10, and thus improving the sealing performance of the connection structure between the heating component 12 and the pump housing 11.

[0056] The other parts of the motor 14 can be housed inside an isolation enclosure and can be configured to drive the impeller 13 to rotate using the principle of electromagnetic induction. The housing 141 can serve as a shielding sleeve for the motor 14 and is used to support the drive unit.

[0057] The axial direction of the washing pump 10 can be referenced to direction AA in the attached drawing; the radial direction of the washing pump 10 can be referenced to direction BB in the attached drawing. The dimensional relationship between the heating component 12 and the pump housing 11 in the washing pump 10 can include, but is not limited to, the following embodiments.

[0058] Implementation Method 1

[0059] like Figure 2 The radial dimension of the first inner wall surface 1211 is D1, and the radial dimension of the first outer wall surface 1212 is D2, wherein 1 / 3 ≤ D1 / D2 ≤ 2 / 3. For example, the ratio D1 / D2 can be set to 1 / 3, 1 / 2, 3 / 5, or 2 / 3, etc. This setting can improve the heating efficiency and effect of the heating component 12 on the fluid in the liquid inlet channel 101, and improve the heating effect of the fluid when it passes through the washing pump 10.

[0060] Wherein, the radial dimension D1 of the first inner wall surface 1211 can be the dimension of the first inner wall surface 1211 in a first direction, and the radial dimension D2 of the first outer wall surface 1212 can be the dimension of the first outer wall surface 1212 in the first direction, wherein the first direction is perpendicular to the axial direction of the washing pump 10. For example, when the first inner wall surface 1211 is a cylindrical surface, the radial dimension D1 of the first inner wall surface 1211 can be the diameter of the cylindrical surface; when the first outer wall surface 1212 is a cylindrical surface, the radial dimension D2 of the first outer wall surface 1212 can be the diameter of the cylindrical surface.

[0061] Implementation Method 2

[0062] like Figure 2 The radial dimension of the first outer wall surface 1212 is D2, and the radial dimension of the second outer wall surface 1112 of the pump housing 11 is D3, wherein 1 / 2 ≤ D2 / D3 ≤ 5 / 6. For example, the ratio D2 / D3 can be set to 1 / 2, 2 / 3, 3 / 4, 4 / 5, or 5 / 6, etc. This setting can improve the heating efficiency and effect of the heating component 12 on the fluid in the outlet flow channel 102, and improve the heating effect of the fluid when passing through the washing pump 10.

[0063] Wherein, the radial dimension of the first outer wall surface 1212 can be the dimension D2 of the first outer wall surface 1212 in the first direction, and the radial dimension D3 of the second outer wall surface 1112 of the pump housing 11 can be the dimension D3 of the second outer wall surface 1112 in the first direction, wherein the first direction is perpendicular to the axial direction of the washing pump 10. For example, when the first outer wall surface 1212 is a cylindrical surface, the radial dimension D1 of the first outer wall surface 1212 can be the diameter of the cylindrical surface; when the second outer wall surface 1112 is a cylindrical surface, the radial dimension D2 of the second outer wall surface 1112 can be the diameter of the cylindrical surface.

[0064] In some embodiments of this utility model, the first inner wall surface and the first outer wall surface can be set as coaxial cylindrical surfaces, which can simplify the structure of the heating component, facilitate the molding of the heating component, and facilitate the installation of the heating component into the pump housing.

[0065] Combination Figure 2 and Figure 6In some embodiments, the heating assembly 12 includes a housing portion 122, a heating portion 124, and an inner tube portion 123. The housing portion 122 is disposed outside the inner tube portion 123. At least a portion of the heating portion 124 is disposed between the housing portion 122 and the inner tube portion 123. At least a portion of the inner surface of the inner tube portion 123 is configured as a first inner wall surface 1211, and at least a portion of the outer surface of the housing portion 122 is configured as a first outer wall surface 1212. The liquid outlet channel 102 is disposed between the housing portion 122 and the pump housing 11. Specifically, the heat from the heating portion 124 can be transferred to the inner tube portion 123 and the housing portion 122. The fluid in the liquid inlet channel 101 can exchange heat with the inner tube portion 123, and the fluid in the liquid outlet channel 102 can exchange heat with the housing portion 122. This avoids direct contact between the fluid and the heating portion 124, and prevents the fluid from scouring the heating portion 124, reducing the risk of leakage and improving the safety of the washing pump 10.

[0066] The heating element 124 includes a heating element and a filling structure. At least a portion of the heating element is disposed between the outer casing 122 and the inner tube 123. At least a portion of the filling structure fills the space between the outer casing 122 and the inner tube 123 and is configured as an insulating medium that exchanges heat with the heating element, the outer casing 122, and the inner tube 123. When the heating element generates heat, the filling structure conducts heat and transfers it to the inner tube 123 and the outer casing 122 to heat the fluid in the inlet channel 101 and the outlet channel 102. The insulating medium prevents leakage in the heating assembly 12 in the event of insulation failure of the heating element. In other words, the heating assembly 12 has dual leakage protection measures: the fluid in the inlet channel 101 and the outlet channel 102 avoids direct contact with the heating element and reduces fluid scouring of the heating element. Furthermore, the cavity is filled with an insulating medium, further preventing contact between the fluid and the heating element, effectively improving the safety of the washing pump 10.

[0067] For example, the inner tube 123 and the outer shell 122 can be stainless steel bushings to improve the thermal conductivity of the heating assembly 12. The insulating medium is alumina thermal conductive agent. The heating element can be a heating plate. The heating plate is the main heat source. The insulating medium plays a good role in heat transfer and insulation. The heat is finally transferred to the liquid inlet channel 101 and the liquid outlet channel 102 through the inner tube 123 and the outer shell 122 to achieve the heating of the fluid.

[0068] For example, combined Figure 2 and Figure 3The heating assembly 12 may also include a heat insulation plate, a terminal block 125, and a heating conduit. The heat insulation plate is located at the end of the outer casing 122 near the pump inlet to prevent heat loss. The terminal block 125 and the heating conduit may be located on the heat insulation plate. The terminal block 125 may be plugged into an external power source. The heating conduit may be connected to the heating element. The terminal block 125 may be electrically connected to the heating conduit via a connecting wire. The external power source may transmit current to the heating element through the terminal block 125, the connecting wire, and the heating conduit to electrically heat the heating element and heat the fluid in the inlet channel 101 and the outlet channel 102.

[0069] like Figure 6 The axial length of the portion of the inner tube 123 that contacts the heating part 124 is L1, and the axial length of the inner tube 123 is L2. In some examples, the ratio L1 / L2 can be set to L1 / L2≥1 / 2 to avoid the problem of low heating efficiency caused by an excessively low ratio of L1 / L2, and to improve the heating efficiency of the heating part 124 on the liquid inlet channel 101.

[0070] In other examples, the ratio L1 / L2 can be set to L1 / L2 ≤ 4 / 5. This is to provide a sufficiently long and smooth flow path for the water flow at the inlet of the liquid inlet channel 101, thereby improving hydraulic and heating efficiency.

[0071] In some examples, the ratio L1 / L2 can be set to 1 / 2 ≤ L1 / L2 ≤ 4 / 5. For example, the ratio L1 / L2 can be set to 1 / 2, 2 / 3, 3 / 4, or 4 / 5, etc.

[0072] Optionally, a mating groove 1213 with an opening facing the impeller 13 is constructed between the periphery of the outlet end of the inner tube 123 and the outer shell 122. An annular rib 134 is provided around the liquid inlet of the impeller 13, and at least a portion of the annular rib 134 extends into the mating groove 1213 to construct a labyrinth seal structure. This can improve the mating stability between the impeller 13 and the heating assembly 12.

[0073] In some embodiments, the inner tube 123 extends along the axis of the impeller 13. One end of the inner tube 123 is set as the outlet end of the liquid inlet channel 101, and the other end of the inner tube 123 is provided with a pump inlet communicating with the liquid inlet channel 101. The outlet end of the liquid inlet channel 101 is connected to the liquid inlet of the impeller 13, so that the fluid can enter the inner tube 123 from the pump inlet and be transported to the impeller 13 to do work. This ensures that the fluid flows from the pump inlet to the outlet end of the liquid inlet channel 101, and the heating element fully heats the fluid, thereby improving the heating effect of the heating element.

[0074] like Figure 2In some embodiments, the first end of the inner tube 123 is located inside the pump housing 11 and does not extend out of the outer housing 122. This facilitates the cooperation between the inner tube 123 and the impeller 13, allows the impeller 13 to drive fluid flow, reduces the gap between the impeller 13 and the heating assembly 12, prevents fluid backflow from the gap, and avoids interference between the heating assembly 12 and the impeller 13.

[0075] In addition, such as Figure 2 The second end of the inner tube 123 is located outside the pump housing 11 and extends beyond the outer housing 122. This facilitates the connection of the inner tube 123 to external pipelines, enabling the washing pump 10 to connect to other components. Furthermore, it allows the heating assembly 12 to effectively heat the liquid inlet channel 101, improving heating efficiency and stability, and reducing heat loss through external pipelines or other structures, thus reducing energy consumption and promoting energy conservation and environmental protection.

[0076] In some embodiments, such as Figure 1 and Figure 7 The heating component 12 is provided with a terminal block 125 at the end away from the inner cavity of the pump housing 11. The terminal block 125 is electrically connected to the heating part 124. This allows the heating component 12 to be easily connected to an external power supply or controller. The terminal block 125 can be positioned on the end face of the heating component 12 by welding or other methods, or the terminal block 125 can be cast integrally with the end face of the heating component 12.

[0077] The heating element 12 is cast as a single piece. Alternatively, the inner tube 123, the outer shell 122, and the heating element 124 are cast as a single piece. This improves the heating performance of the heating element 124 on the inner tube 123 and the outer shell 122, thereby increasing the heating efficiency of the fluid. Furthermore, it also improves the manufacturing efficiency of the heating element 12.

[0078] In some embodiments, the radial dimension D4 of the second outer wall surface 1112 of the pump housing 11 is no greater than 74 mm. This can improve the integration of the washing pump 10 and facilitate the miniaturization of the washing pump 10.

[0079] Among them, such as Figure 2 and Figure 5 The heating assembly 12 has a mating groove 1213 at its end, with the opening of the mating groove 1213 facing the impeller 13. The impeller 13 has annular ribs 134 around its inlet, with at least a portion of the ribs 134 extending into the mating groove 1213 to form a labyrinth seal. The impeller 13 has a step at its inlet, the main purpose of which is to form a labyrinth seal with the heating assembly 12, reducing internal leakage and improving pumping efficiency and sealing methods.

[0080] A certain gap may exist between the heating assembly 12 and the impeller 13 to ensure that the impeller 13 can rotate. Since the fluid pressure in the outlet channel 102 is greater than the fluid pressure in the inlet channel 101, under the action of the pressure difference, the fluid in the outlet channel 102 flows back to the inlet of the impeller 13 through the aforementioned gap. A sealing structure may be provided between the heating assembly 12 and the impeller 13. The sealing structure may be provided in the gap between the heating assembly 12 and the impeller 13 to increase the resistance to the fluid backflow in the outlet channel 102, reduce the fluid backflow, and thus reduce the volumetric loss of the washing pump 10.

[0081] Specifically, the fluid is heated by the heating component 12 after entering the inlet channel 101 and is then drawn into the impeller 13. After being pressurized by the impeller 13, the fluid enters the outlet channel 102 and is heated again by the heating component 12 before being delivered to the target location. In other words, the fluid can be heated by the heating component 12 both before and after being pressurized by the impeller 13, thereby improving the heating efficiency of the fluid and meeting the needs for rapid heating of fluid in different application scenarios. The inlet of the impeller 13 is opposite to the inlet channel 101. Under the guiding effect of the inlet channel 101, the fluid is stably input into the impeller 13 through the inlet channel 101 to rectify the fluid entering the impeller 13 and make it flow smoothly along the axial direction. At the same time, the outlet of the impeller 13 is connected to the outlet channel 102. The pressurized fluid flows directly out to the outlet channel 102 so that it can be reheated by the heating component 12. This avoids the fluid from generating eddies or uneven flow velocity, which would lead to uneven heating, reduces the energy loss of the pressurized fluid, and also improves the efficiency of the washing pump 10 in conveying fluid.

[0082] like Figure 5 The inner surface of the annular rib 134 is provided with a second notch 154, and at least a portion of the periphery of the outlet end of the liquid inlet channel 101 is provided in the second notch 154. This can further improve the sealing effect between the impeller 13 and the heating assembly 12.

[0083] like Figure 2 as well as Figures 7 to 9In some embodiments, the inlet of the impeller 13 is axially opposite to the inlet channel 101, and the inlet gradually expands in the direction away from the inlet channel 101 along the axial direction. After the labyrinth seal, the flow channel defined by the extension of the impeller 13 has a gradually expanding trend. That is, the diameter of the inlet channel 101 remains constant, and it gradually expands towards the inlet of the impeller 13. Firstly, keeping the diameter of the inlet channel 101 of the washing pump 10 constant is to maintain a constant inflow velocity and direction, which helps to reduce energy loss when entering the impeller 13; the gradually expanding trend of the inlet of the impeller 13 has the following advantages: 1. The gradually expanding flow channel reduces the relative velocity of the fluid by gradually increasing the cross-sectional area of ​​the flow channel, avoiding turbulence and energy loss caused by excessive flow velocity. 2. According to the law of conservation of energy, the gradual expansion of the flow channel converts part of the fluid's kinetic energy into static pressure energy, thereby increasing the outlet pressure, i.e., the head; 3. Due to the rotation of the impeller 13, the velocity at the fluid outlet is deflected tangentially. The gradual expansion flow channel and the backward-curved blades 133 work together to ensure a smooth fluid transition and improve hydraulic efficiency; 4. Under different operating conditions, the gradual expansion flow channel can maintain a relatively stable pressure distribution even at low flow rates, reducing noise and cavitation risks.

[0084] like Figure 2 In some embodiments, the ratio of the radial dimension D5 of the impeller 13 to the radial dimension D2 of the first outer wall surface 1212 is greater than or equal to 0.9 and less than or equal to 1.1. Alternatively, the outlet of the impeller 13 can be arranged radially opposite to the outlet channel 102 axially. This facilitates the impeller 13's drive of the fluid, improving the stability and pumping efficiency of the washing pump 10. Furthermore, it simplifies the structure of the washing pump 10 and improves its performance.

[0085] like Figure 2 as well as Figures 7 to 10 In some embodiments, the impeller 13 includes a first end plate 131, a second end plate 132, and a plurality of blades 133. The first end plate 131 is axially opposite to the heating assembly 12; the second end plate 132 is axially opposite to the first end plate 131; and the plurality of blades 133 are disposed between the first end plate 131 and the second end plate 132. The impeller 13 may be configured to include a first end plate 131, a plurality of blades 133, and a second end plate 132, wherein the first end plate 131 and the second end plate 132 sandwich the blades 133 in the middle to form a closed impeller 13; the blades 133 may be cylindrical in-line blades 133, and the number may be 6.

[0086] The first end plate 131 includes a plate body with a central hole and an annular rib 134 connecting the periphery of the central hole. The plate body is axially opposite to the end of the heating assembly 12, making the structure of the washing pump 10 more compact and reducing the space occupied by the washing pump 10. The annular rib 134 extends circumferentially along the impeller 13 and forms an inlet. The annular rib 134 is rotatably disposed in the mating groove 1213 around the axis of the impeller 13, which facilitates the limited assembly of the annular rib 134 and the mating groove 1213, preventing the impeller 13 from deviating from the space in the mating groove 1213 when rotating, and improving the stability of the impeller 13 rotation. In addition, the mating groove 1213 and the annular rib 134 are provided to cooperate, which can extend the path of fluid returning from the outlet of the impeller 13 to the inlet of the impeller 13, increase the resistance of fluid return, thereby reducing fluid return and improving the volumetric efficiency of the pump.

[0087] For example, the impeller 13 may include a plate body and a second end plate 132. The second end plate 132 and the plate body are distributed along the axis of the impeller 13, and the plate body and the mating surface may be opposite each other in a direction parallel to the axis of the impeller 13. During the high-speed rotation of the impeller 13, the pressure on the side of the second end plate 132 away from the plate body is greater, and it has a thrust towards the plate body. During the high-speed rotation of the impeller 13, it may move along the axial direction and approach the mating surface. There is a certain gap size between the mating surface and the plate body, so that the impeller 13 can have a certain range of motion in the axial direction. This can reduce the risk of collision between the plate body and the mating surface during the high-speed rotation of the impeller 13 and improve the rotational stability of the impeller 13.

[0088] Optionally, such as Figure 2 and Figure 5 At least a portion of the annular rib 134 is rotatably disposed within the mating groove 1213, and at least a portion of the annular rib 134 and the first inner wall surface 1211 of the mating groove 1213 can form a labyrinth seal structure. The labyrinth seal structure has a certain obstruction effect on the backflow of fluid, which makes the leakage path of the gap between the impeller 13 and the pump casing 11 longer, thereby increasing the flow resistance in the gap, which can effectively reduce pump leakage, improve the effective output of the pump and reduce energy loss.

[0089] In some examples, the gap between the first end plate 131 and the heating assembly 12 gradually widens radially outward. This allows the impeller 13 to easily drive fluid from the inlet channel 101 to the outlet channel 102, improving the stability and safety of the washing pump 10 operation.

[0090] In some examples, the first end plate 131 gradually tilts towards the second end plate 132 in a radially outward direction. The outer surface of the first end plate 131 tilts away from the heating assembly 12 in a radially outward direction along the impeller 13, so that the outer surface of the first end plate 131 and the heating assembly 12 are in clearance fit. The heating assembly 12 may have a mating surface opposite to the first end plate 131. When the impeller 13 rotates at high speed, there is a certain gap between the first end plate 131 and the mating surface, reducing the possibility of collision between the first end plate 131 and the mating surface.

[0091] like Figures 1 to 10 In some embodiments, the side wall of the pump housing 11 is provided with a communication port 113, and the washing pump 10 also includes a liquid outlet pipe 114, which connects to the periphery of the communication port 113 and extends radially away from the pump housing 11. The washing pump 10 of this utility model has a simple and novel structure, integrating heating and pressurization into one component; it has high hydraulic efficiency and high heating efficiency.

[0092] This utility model also provides a dishwasher, including the aforementioned washing pump 10. The specific structure of the washing pump 10 is as described in the above embodiments. Since this dishwasher adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A washing pump (10), characterized in that, include: Pump casing (11); A heating assembly (12) is provided in the pump housing (11) at least a portion thereof. The heating assembly (12) includes a first inner wall surface (1211) radially distributed along the washing pump (10) and a first outer wall surface (1212) surrounding the first inner wall surface (1211). An inlet channel (101) is formed in the first inner wall surface (1211), and an outlet channel (102) is formed between the first outer wall surface (1212) and the pump housing (11). Impeller (13), which is arranged opposite to the heating assembly (12) along the axial direction of the washing pump (10), is rotatable to drive fluid from the inlet channel (101) to the outlet channel (102); A motor (14) is connected to the pump housing (11), and the motor (14) is configured to drive the impeller (13) to rotate. The heating assembly (12) further includes a cover (126) that extends radially out of the first inner wall surface (1211) and covers the end of the pump housing (11) away from the impeller (13).

2. The washing pump (10) according to claim 1, characterized in that, The cover portion (126) covers the outside of the pump housing (11) along the axial direction, and the cover portion (126) is fixedly connected to the pump housing (11).

3. The washing pump (10) according to claim 2, characterized in that, The pump housing (11) includes a positioning part (112) that protrudes from the second inner wall surface (1111) of the pump housing (11), and the cover part (126) is disposed on the outside of the positioning part (112) and fixedly connected to the positioning part (112).

4. The washing pump (10) according to claim 3, characterized in that, The positioning part (112) is provided with a first sealing groove, and the washing pump (10) further includes a first sealing ring (151) provided in the first sealing groove and sealingly engaged with the cover part (126).

5. The washing pump (10) according to claim 1, characterized in that, The pump casing (11) is provided with a baffle (115) at its end, and the cover (126) is located inside the baffle (115).

6. The washing pump (10) according to claim 1, characterized in that, The motor (14) includes a housing (141) connected to the other end of the pump housing (11), and the impeller (13) is disposed between the housing (141) and the pump housing (11) along the axial direction.

7. The washing pump (10) according to claim 6, characterized in that, The second outer wall surface (1112) of the pump housing (11) is provided with a first fastening position (1421), and the cover (141) is provided with a second fastening position (1422). The first fastening position (1421) and the second fastening position (1422) are rotated and fastened together.

8. The washing pump (10) according to claim 6, characterized in that, The cover (141) includes a positioning protrusion (1411) and a mating part (1412). The positioning protrusion (1411) is opposite to the pump housing (11) along the axial direction, and the mating part (1412) is located on the inner periphery of the cover (141).

9. The washing pump (10) according to claim 8, characterized in that, The inner circumferential surface of the other end of the pump housing (11) is provided with a first notch (153). The washing pump (10) also includes an end cap, which covers the other end of the pump housing (11). The periphery of the end cap is positioned between the bottom surface of the first notch (153) and the mating part (1412). And / or, the outer peripheral surface of the mating part (1412) is provided with a second sealing groove, and the washing pump (10) further includes a second sealing ring (152) disposed in the second sealing groove and sealingly engaged with the inner side of the pump housing (11).

10. The washing pump (10) according to claim 1, characterized in that, The heating assembly (12) has a mating groove (1213) facing the impeller (13) at its end. The impeller (13) has an annular rib (134) around its liquid inlet. At least a portion of the annular rib (134) extends into the mating groove (1213) to form a labyrinth seal structure.

11. The washing pump (10) according to claim 10, characterized in that, The inner side of the annular rib (134) is provided with a second notch (154), and at least a portion of the periphery of the outlet end of the liquid inlet channel (101) is provided in the second notch (154).

12. The washing pump (10) according to claim 1, characterized in that, The liquid inlet of the impeller (13) is opposite to the liquid inlet channel (101) along the axial direction, and the liquid inlet gradually expands in the direction away from the liquid inlet channel (101) along the axial direction. And / or, the ratio of the radial dimension of the impeller (13) to the radial dimension of the first outer wall surface (1212) is greater than or equal to 0.9 and less than or equal to 1.1; And / or, the outlet of the impeller (13) is located radially opposite to the outlet channel (102) axially.

13. The washing pump (10) according to claim 1, characterized in that, The impeller (13) includes: A first end plate (131) is opposite to the heating assembly along the axial direction; The second end plate (132) is opposite to the first end plate (131) along the axial direction; Multiple blades (133) are disposed between the first end plate (131) and the second end plate (132). Wherein, the gap between the first end plate (131) and the heating assembly gradually widens outward along the radial direction; and / or, the first end plate (131) gradually tilts towards the second end plate (132) in the direction of radial outward.

14. The washing pump (10) according to claim 1, characterized in that, The side wall of the pump housing (11) is provided with a communication port (113). The washing pump (10) also includes a liquid outlet pipe (114), which is connected to the periphery of the communication port (113) and extends radially away from the pump housing (11).

15. A dishwasher, characterized in that, Includes the washing pump (10) as described in any one of claims 1-14.

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