Heat pump and dishwasher

Abstract

A heat pump and a dishwasher. The heat pump comprises a pump case (11), a cylinder (12), an electric motor (13), an impeller (14) and a heating assembly (15), wherein at least part of the cylinder (12) is arranged inside the pump case (11), a water intake channel (101) is provided on the inner side of the cylinder (12), and a heat pump cavity (102) is provided between the cylinder (12) and the pump case (11); and the heating assembly (15) is arranged inside the cylinder (12) around the water intake channel (101), and the heating assembly (15) is separated from a fluid in the heat pump (10) and transfers heat therefrom. The heat pump prevents a fluid from coming into direct contact with the heating assembly, thereby improving the safety of the heat pump.

Description

Heating pump and dishwasher

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202410905466.X, filed on July 05, 2024, and entitled “Heating pump and dishwasher”, the content of which is incorporated herein by reference in its entirety.

[0003] The present application claims priority to the Chinese patent application No. 202421595334.3, filed on July 05, 2024, and entitled “Heating pump and dishwasher”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0004] The present application relates to the technical field of dishwasher, and in particular, relates to a heating pump and a dishwasher. BACKGROUND

[0005] When cleaning tableware by using a dishwasher, sometimes water needs to be heated for steam washing or hot water washing, etc., so as to improve washing efficiency and effect. In the related art, a heating element is integrated into a pump body to form a heating pump, so that the heating pump can be used to drive fluid and heat the fluid. In the related art, the heating component is immersed in water for heating, which affects the efficiency of the pump. SUMMARY

[0006] The present application aims to at least partly solve one of the problems in the related art. To this end, one object of the present application is to provide a heating pump.

[0007] Another object of the present application is to provide a dishwasher.

[0008] According to the heating pump of the embodiments of the present application, the heating pump is used in a dishwasher, and comprises a pump shell, a cylinder body, a motor, and an impeller. The cylinder body is arranged at least partially in the pump shell, and the inner side of the cylinder body is provided with a water inlet flow channel. The motor has a rotating shaft and is connected to the pump shell, and the rotating shaft extends into the heating pump cavity. The impeller is arranged in the heating pump cavity and is mounted on the rotating shaft, and the impeller is opposite to the cylinder body along the axial direction. The heating assembly is arranged in the cylinder body and surrounds the water inlet flow channel, and the heating assembly is separated from the fluid in the heating pump and is in thermal contact with the fluid.

[0009] In addition, the heating pump according to the above-mentioned embodiments of the present application can also have the following additional technical features:

[0010] In some embodiments, the cylinder body comprises a first cylinder portion and a second cylinder portion arranged inside the first cylinder portion, a heating groove is formed between the first cylinder portion and the second cylinder portion, and the heating assembly is arranged in the heating groove.

[0011] In some embodiments, the cylinder body further comprises a first fairing shaped to match the impeller, and the first fairing is arranged outside the impeller.

[0012] In some embodiments, the first fairing connects the first cylinder portion and the second cylinder portion, and the first cylinder portion, the first fairing, and the first cylinder portion form the heating groove.

[0013] In some embodiments, the inner diameter of the first cylinder portion is larger than the outer diameter of the second cylinder portion.

[0014] In some embodiments, the end of the first cylinder portion close to the impeller protrudes from the second cylinder portion, and the first fairing is configured to be inclined towards the impeller in the direction from the first cylinder portion to the second cylinder portion.

[0015] In some embodiments, the end edge of the first cylinder portion close to the impeller connects the outer periphery of the first fairing, and the end edge of the second cylinder portion close to the impeller connects the inner periphery of the first fairing.

[0016] In some embodiments, the first cylinder portion, the second cylinder portion, and the first fairing are arranged as an integrated structure.

[0017] In some embodiments, the cylinder body further comprises an end plate, the end plate connects one end of the first cylinder portion close to the impeller and one end of the second cylinder portion close to the impeller, and the first cylinder portion, the end plate, and the first cylinder portion form the heating groove.

[0018] In some embodiments, the heating pump further comprises a second fairing, the second fairing is arranged outside the impeller and is shaped to match the impeller.

[0019] In some embodiments, the second fairing is located between the impeller and the cylinder body, the second fairing is provided with an axial interface, and the axial interface is in fluid communication with the water inlet channel.

[0020] In some embodiments, the heating pump further comprises a flow guide cylinder, the flow guide cylinder connects the axial interface of the second fairing, the water inlet channel is formed inside the flow guide cylinder, the flow guide cylinder is arranged in the second cylinder portion, and the heating assembly is indirectly arranged around the flow guide cylinder.

[0021] In some embodiments, the inner diameter of the axial interface is larger than the inner diameter of the flow guide cylinder.

[0022] In some embodiments, a step structure is formed between the second fairing and the fairing cylinder.

[0023] In some embodiments, an end of the fairing cylinder away from the second fairing is configured as an inlet of the water inlet flow channel; or, the end of the fairing cylinder away from the second fairing extends out of the cylinder body; or, the end of the fairing cylinder away from the second fairing does not extend out of the cylinder body, and is connected to an end of the second fairing through a heating pump water inlet pipe.

[0024] In some embodiments, in a projection along the axis of the pump shell, the cylinder body falls within the second fairing.

[0025] In some embodiments, the cylinder body further comprises a flange portion connected to an end of the first cylinder portion away from the impeller, extending radially outwardly and connected to the pump shell.

[0026] In some embodiments, the pump shell comprises a first flange portion, the flange portion is connected to the first flange portion in a laminated manner; and / or, an outer periphery of the flange portion is provided with a second flange portion.

[0027] The dishwasher according to the embodiments of the present application comprises the aforementioned heating pump. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a sectional view of a heating pump according to an embodiment of the present application.

[0029] FIG. 2 is a schematic view of a cylinder body of a heating pump and a heating assembly according to an embodiment of the present application.

[0030] FIG. 3 is a sectional view of a cylinder body of a heating pump and a heating assembly according to an embodiment of the present application.

[0031] FIG. 4 is a sectional view of a cylinder body of a heating pump and a heating assembly according to another embodiment of the present application.

[0032] FIG. 4 is a sectional view of a cylinder body of a heating pump and a heating assembly according to another embodiment of the present application. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] As shown in Fig. 1, the heating pump 10 according to the embodiments of the present application can be used in a dishwasher or other equipment, for pumping and heating fluid. The heating pump 10 can include a pump shell 11 and a cylinder 12, at least a part of the cylinder 12 being arranged in the pump shell 11. The entire cylinder 12 can be arranged in the pump shell 11, or a part of the cylinder 12 can be arranged in the pump shell 11. The inner side of the cylinder 12 is provided with a water inlet channel 101, and a heating pump cavity 102 is arranged between the cylinder 12 and the pump shell 11. The water inlet channel 101 and the heating pump cavity 102 are respectively used for fluid passing.

[0035] The heating pump 10 can further include a motor 13 and an impeller 14. The motor 13 has a rotating shaft 131, and the motor 13 is connected to the pump shell 11, with the rotating shaft 131 extending into the heating pump cavity 102. The impeller 14 is arranged in the heating pump cavity 102, and is mounted on the rotating shaft 131. The impeller 14 is opposite to the cylinder 12 along the axial direction. The motor 13 can drive the impeller 14, and the impeller 14 can drive fluid,

[0036] The heating pump 10 further includes a heating assembly 15 arranged in the cylinder 12 and surrounding the water inlet channel 101. The heating assembly 15 can be used for heating fluid, and can heat fluid when the fluid passes through the heating pump. For example, fluid enters the water inlet channel 101 from the inlet of the heating pump 10; then the fluid passes through the impeller and enters the heating pump cavity 102; then the fluid is sent out from the outlet of the heating pump 10. The heating assembly 15 can heat fluid during the fluid passing through the heating pump.

[0037] In addition, the heating assembly 15 is separated from the fluid in the heating pump and conducts heat, so as to achieve insulation between the heating assembly 15 and the fluid. By separating the heating assembly 15 from the water inlet channel 101 and the heating pump cavity 102, the fluid is prevented from directly contacting the heating assembly 15, so as to isolate the heating assembly 15 from the fluid, thereby avoiding safety hazards caused by the fluid being electrified, and improving the safety of the heating pump 10.

[0038] According to the heating pump 10 of the embodiments of the present application, the fluid flow can be driven by the motor 13, the heating assembly 15 is arranged in the barrel 12, the fluid can be heated by the larger surface of the barrel 12, the heating efficiency is improved, and the heating assembly 15 arranged in the barrel 12 can avoid hindering the fluid flow, reducing the fluid resistance, reducing the flow resistance, and improving the fluid flow efficiency. The heating assembly 15 is arranged in the barrel 12, the fluid can be heated by the larger surface of the barrel 12, the heating efficiency and safety are considered, and the efficiency of the pump is ensured.

[0039] As shown in FIG. 1, the heating pump 10 includes a motor 13, an impeller 14, a pump shell 11, a barrel 12, and a heating assembly 15. The first end of the pump shell 11 is sleeved with the motor 13 and a sealing ring is arranged therebetween. The pump shell 11 can be fixedly connected and sealingly matched with the motor 13. The pump shell 11 can include a first segment and a second segment. The first segment is sleeved with the motor 13, and the second segment is connected with the first segment. The radial dimension of the second segment is smaller than that of the first segment. A stepped surface is connected between the inner circumferential surface of the second segment and the inner circumferential surface of the first segment. The stepped surface can be arranged to position the pump shell 11 and the motor 13. The second end of the pump shell 11 can have a first flange portion 111 which can be configured to extend towards the inside of the pump shell 11. In addition, the outer edge of the first flange portion 111 can be provided with a rib. The first flange portion 111 can be connected with the barrel 12 to close the heating pump cavity 102. The heating assembly 15 can be arranged as an annular heating ring.

[0040] As shown in FIG. 1, in some embodiments, one end of the water inlet channel 101 is opposite to the impeller 14, and the other end is configured as a liquid inlet 103 of the heating pump 10. Fluid can pass into the heating pump 10 through the liquid inlet 103. The liquid inlet 103 can be arranged as an inlet of the heating pump 10. During use of the heating pump 10, fluid can pass into the water inlet channel 101 from the liquid inlet 103 and pass into the heating pump cavity 102 under the driving action of the impeller 14.

[0041] As shown in FIG. 3 and FIG. 4, in some embodiments, the barrel 12 includes a first barrel portion 121 and a second barrel portion 122. The second barrel portion 122 is arranged inside the first barrel portion 121, and a heating groove is formed between the first barrel portion 121 and the second barrel portion 122. The heating assembly 15 is arranged in the heating groove. The heating assembly 15 can be arranged in the heating groove. The heat of the heating assembly 15 can be conducted to the first barrel portion 121 and / or the second barrel portion 122, and the fluid can be heated by the surface of the first barrel portion 121 and / or the second barrel portion 122. In addition, the first barrel portion 121 and the second barrel portion 122 can separate the heating assembly 15 from the fluid in the heating pump, and achieve insulation between the heating assembly 15 and the fluid.

[0042] The application utilizes heat conduction to conduct the heat of the heating assembly 15 to the fluid, and the heating mode of the heating assembly 15 is heat conduction rather than direct immersion. The insulation of the heating assembly 15 from the fluid in the water inlet flow channel 101 and the fluid in the heating pump cavity 102 effectively improves the safety of the heating pump 10,

[0043] At least two of the first cylinder portion 121, the second cylinder portion 122 and the pump shell 11 are arranged in a coaxial manner, which facilitates the flow of the fluid, simplifies the structure of the heating pump 10, reduces the flow resistance of the fluid, thereby reducing the size of the heating pump 10, facilitating the miniaturization of the heating pump 10, reducing the cost, and increasing the application range of the heating pump 10.

[0044] The shape of the cylinder body in the application includes but is not limited to the following embodiments.

[0045] Embodiment one

[0046] The cylinder body 12 further comprises a first flow guide cover 161 matched with the shape of the impeller 14, the first flow guide cover 161 connects the first cylinder portion 121 and the second cylinder portion 122, and the first flow guide cover 161 covers the outside of the impeller 14. The first cylinder portion 121, the first flow guide cover 161 and the first cylinder portion 121 form a heating groove. The first flow guide cover 161 is matched with the structure of the impeller 14, wherein the first flow guide cover 161 can be arranged to be tightly attached to the impeller 14, and the wall surface is smooth, thereby ensuring good pump efficiency. The cylinder body has a heating assembly 15, and since the cylinder body extends into the pump shell, most of the heat of the heating assembly can be absorbed by the liquid in the heating pump 10, rather than being dissipated to the air. The first flow guide cover 161 can be used to guide the flow of the fluid, so that the fluid can smoothly pass through the impeller 14, facilitate the flow of the driven fluid, and improve the pumping efficiency of the heating pump 10.

[0047] The first flow guide cover 161 can be arranged in an integral structure with the first cylinder portion 121 and the second cylinder portion 122, thereby improving the structural strength of the cylinder body and the sealing performance of the heating groove, avoiding water entering the heating groove or the leakage of the heat-conducting medium in the heating groove, and also avoiding the problem of water contacting the heating assembly 15 to cause insulation failure, thereby improving the stability and safety of the heating pump.

[0048] Optionally, the first flow guide cover 161 covers the outside of the impeller 14, and at least a portion of the first flow guide cover 161 is arranged at the outer periphery of the impeller 14, or in other words, at least a portion of the first flow guide cover 161 is arranged along the radial direction of the impeller 14, which can facilitate the flow of the fluid from the water inlet flow channel 101 to the impeller 14, and improve the driving efficiency of the impeller 14 on the fluid.

[0049] As shown in FIG. 4, the first cylinder portion 121 surrounds the second cylinder portion 122 and extends along the axial direction of the impeller 14, the first cylinder portion 121 is connected to the outer periphery of the first flow guide 161 near the one end edge of the impeller 14, and the second cylinder portion 122 is connected to the inner periphery of the first flow guide 161 near the one end edge of the impeller 14.

[0050] The inner diameter of the first cylinder portion 121 is larger than the outer diameter of the second cylinder portion 122, and the end of the first cylinder portion 121 near the impeller 14 extends out of the second cylinder portion 122, and the first flow guide 161 is arranged to be inclined toward the impeller 14 in the direction from the first cylinder portion 121 to the second cylinder portion 122. The first flow guide 161 can be arranged in a conical shape, or arranged in an arc shape gradually inclined toward the impeller 14 in the direction from the first cylinder portion 121 to the second cylinder portion 122. Conveniently, the first flow guide 161 can guide the flow of fluid, reduce the flow resistance in the flow process of the fluid, and further optimize the flow efficiency of the fluid.

[0051] Embodiment two

[0052] As shown in FIG. 2 and FIG. 3, the cylinder body 12 further comprises an end plate 123 connected to the one end of the first cylinder portion 121 near the impeller 14, and the end plate 123 is connected to the one end of the second cylinder portion 122 near the impeller 14. Specifically, the outer periphery of the end plate 123 is connected to the one end of the first cylinder portion 121, and the inner periphery of the end plate 123 is connected to the one end of the second cylinder portion 122, and the first cylinder portion 121, the end plate 123 and the second cylinder portion 122 are connected to form a heating groove. The cylinder body 12 can be made of stainless steel, and the cylinder body 12 is filled with an insulating and heat-conducting medium, and the heating pipe is arranged in the insulating and heat-conducting medium, so as to realize the insulation of the heating pipe and the cylinder body 12, and can conduct heat to the water inlet flow channel 101 and the heating pump cavity 102, and realize effective heating of the fluid.

[0053] Embodiment three

[0054] The heating pump 10 further comprises a second flow guide 162 arranged outside the impeller 14 and matched with the shape of the impeller 14, the second flow guide 162 is located between the impeller 14 and the cylinder body 12, and the second flow guide 162 is provided with an axial interface which can extend into the first cylinder body 12 and be in fluid communication with the water inlet flow channel 101. The second flow guide 162 can be arranged in a split structure or an integral structure with the cylinder body 12, and by extending the axial interface of the second flow guide 162 into the first cylinder body 12, the fluid in the water inlet flow channel 101 can be conveniently guided to the impeller 14, further facilitating the flow of the fluid, and improving the pumping efficiency of the heating pump 10.

[0055] The second flow guide cover 162 is shaped to fit the structure of the impeller 14, wherein the second flow guide cover 162 can be arranged to be tightly attached to the impeller 14 and the wall surface is smooth, thereby ensuring good pump efficiency. The cylinder has a heating assembly 15, and since the cylinder extends into the pump shell, most of the heat of the heating assembly can be absorbed by the liquid in the heating pump 10 without being dissipated to the air. The second flow guide cover 162 can be used to guide the flow of fluid, so that the fluid can smoothly pass through the impeller 14, facilitate the flow of the driven fluid, and improve the pumping efficiency of the heating pump 10.

[0056] In addition, in some examples, the heating pump 10 can further include a flow guide cylinder 163 connected to the axial interface of the second flow guide cover 162. Referring to the drawings, the flow guide cylinder 163 is located above the impeller 14 (referring to the upper part of the impeller 14 in the drawings), the inside of the flow guide cylinder 163 forms a water inlet flow channel 101, the flow guide cylinder 163 is arranged in the second cylinder, and the heating assembly 15 is indirectly arranged around the flow guide cylinder 163. By arranging the flow guide cylinder 163, the flow of fluid can be guided, so that the fluid can stably flow into the heating pump through the flow guide cylinder 163, and the flow resistance of the fluid is reduced. In addition, the arrangement of the flow guide structure can facilitate the installation and positioning of the cylinder, simplify the assembly process of the heating pump 10, and improve the stability of the heating pump 10.

[0057] As shown in the drawings, the inner diameter of the axial interface is larger than the inner diameter of the flow guide cylinder 163, and a step structure is formed between the second flow guide cover 162 and the flow guide cylinder 163 for accommodating the impeller 14. By using the step to accommodate the impeller 14, the end of the impeller 14 can extend into the second flow guide cover 162 and axially opposite to the flow guide cylinder, reducing the size difference between the inlet of the impeller and the outlet of the flow guide cylinder, reducing the flow resistance of the fluid along the water inlet flow channel 101 to the impeller 14, and improving the energy efficiency.

[0058] In one example, the end of the flow guide cylinder away from the second flow guide cover can be configured as the inlet of the water inlet flow channel, wherein the end of the flow guide cylinder away from the second flow guide cover can extend out of the cylinder. This can simplify the structure of the heating pump, facilitate the connection of the external pipeline by using the flow guide cylinder, and reduce the heat leakage of the cylinder or the heating assembly, thereby further improving the heating efficiency.

[0059] In another example, the end of the flow guide cylinder away from the second flow guide cover does not extend out of the cylinder, and the heating pump water inlet pipe is connected to the end of the second flow guide cover. This can simplify the structure of the heating pump and facilitate the connection of the external pipeline.

[0060] In some embodiments of the present application, in combination with the foregoing embodiments, in the projection along the axis of the pump shell 11, the barrel 12 can fall into the second fairing 162. Thus, the effective flow guiding of the fluid by the second fairing 162 can be achieved, the flow guiding effect of the second fairing 162 is improved, and the pumping efficiency and heating speed of the heating pump 10 are improved, and the performance of the heating pump 10 is effectively improved.

[0061] The barrel 12 and the second fairing in the present application can be provided as an integrated structure, for example, the barrel 12 and the second fairing are integrally formed; or the barrel 12 and the second fairing are respectively formed and then welded, bonded or fixedly connected; the barrel 12 and the second fairing can also be provided as a split structure.

[0062] Embodiment four

[0063] In addition, the barrel 12 of the present application can further include a flange portion 124, the flange portion 124 is connected to one end of the first barrel portion 121 away from the impeller 14 and extends radially outward and is connected to the pump shell 11, the flange portion 124 can be laminated and connected to the outside of the aforementioned first flange portion 111, for fixed connection of the inner shell and the pump shell 11.

[0064] Optionally, the pump shell 11 includes a first flange portion 111, and the flange portion 124 is laminated and connected with the first flange portion 111. The fastening and sealing of the inner shell and the pump shell 11 can be achieved, and the stability and energy efficiency of the heating pump 10 are improved.

[0065] As shown in FIG. 3, the first barrel portion 121 surrounds the second barrel portion 122 and extends along the axis direction of the impeller 14, one end edge of the first barrel portion 121 close to the impeller 14 is connected to the outer periphery of the end plate 123, and one end edge of the second barrel portion 122 close to the impeller 14 is connected to the inner periphery of the end plate 123; the other end of the first barrel portion 121 extends out of the other end of the second barrel portion 122. The other end of the first barrel portion 121 is connected with the flange portion 124, and the flange portion 124 extends in the direction away from the second barrel portion 122 in the radial direction, and the outer periphery of the flange portion 124 is provided with the first flange portion 111, and the first flange portion 111 is configured to extend away from the impeller 14.

[0066] In addition, the foregoing different embodiments can be implemented alone, or multiple embodiments can be combined to form new technical solutions without conflict. The barrel in the present application can also have other technical features.

[0067] In some examples, the end of the second barrel portion away from the impeller 14 can be provided not to extend out of the first barrel portion, including but not limited to, the end of the second barrel portion 122 away from the impeller 14 is flush with the end of the first barrel portion; or, the end of the second barrel portion 122 away from the impeller 14 is shorter than the end of the first barrel portion.

[0068] In addition, in some examples, the end of the second cylinder portion 122 away from the impeller 14 can extend out of the first cylinder portion. In this case, the length of the end of the second cylinder portion 122 away from the impeller 14 extending out of the first cylinder portion is L1, and the length of the second cylinder portion 122 cooperating with the first cylinder portion is L2, and the ratio L1 / L2 can be set to be greater than or equal to 0 and less than or equal to 1. For example, the ratio L1 / L2 can be set to 0, 0.05, 0.12, 0.25, 0.6, or 1, etc. Different types of heating assemblies 15 can be used to heat the fluid, and the second cylinder portion 122 can be effectively shortened, facilitating the miniaturization of the heating pump 10.

[0069] In some embodiments, the heating pump cavity 102 surrounds the first cylinder portion, and can be arranged to extend in the same direction as the first cylinder portion. In this case, the first cylinder portion can be arranged to extend along the axis of the heating pump 10, and the heating pump cavity 102 can also be arranged to extend along the axis of the heating pump 10.

[0070] The peripheral wall of the pump housing can be provided with the liquid outlet 104 of the heating pump 10, and the fluid after being treated can be discharged through the liquid outlet 104. The length of the heating pump cavity 102 can be shortened, thereby reducing the size of the heating pump 10. Moreover, the fluid can be heated by the heating assembly 15 when passing through the heating pump cavity 102, thereby fully utilizing the space in the flow passage to heat the fluid. This not only saves other paths in the heating pump 10 that cannot be heated by the heating assembly 15, but also achieves the purpose of reducing the size of the heating pump 10. In addition, the fluid can enter the heating pump 10 through the inlet, be heated by the heating assembly 15 when passing through the second cylinder portion 122, and be heated by the heating assembly 15 when passing through the heating pump cavity 102, and then be discharged through the outlet.

[0071] In combination with the foregoing, the external pipeline element can communicate with the heating pump 10 through the inlet to introduce the fluid into the heating pump 10, and communicate with the heating pump 10 through the outlet to lead the fluid out of the heating pump 10. The length of the second cylinder portion 122 and the length of the water outlet flow passage of the heating pump 10 can be reduced, and the size of the heating pump 10 can be reduced to facilitate the miniaturization design of the heating pump 10. Moreover, the fluid can be heated by the heating assembly 15 when passing through the second cylinder portion 122 and the heating pump cavity 102. The fluid can be heated by the heating assembly 15 during the flow process in the heating pump 10. In this way, the size of the heating pump 10 can be reduced, and the fluid can be fully heated to improve the heating efficiency and effect.

[0072] Of course, in the present application, the end of the second cylinder portion 122 away from the impeller can be configured as the inlet of the heating pump 10, and the peripheral wall of the pump shell can be configured as the outlet of the heating pump 10. In addition, in the present application, the inlet end of the second cylinder portion 122 can also be connected to the first pipeline, and the liquid inlet 103 is arranged on the first pipeline; or the second pipeline is connected to the peripheral wall of the heating pump cavity 102, and the liquid outlet 104 is arranged on the second pipeline.

[0073] As shown in FIG. 1, in some embodiments, at least a portion of the liquid outlet 104 is opposite the heating assembly 15 along the radial direction of the heating pump 10. Through this arrangement, the fluid can be conveniently sent out through the heating pump cavity 102 in a shorter path, so as to further optimize the miniaturized design of the heating pump 10 and optimize the performance of the heating pump 10.

[0074] In addition, the cylinder body and the pump shell 11 can be connected to the same side of the motor 13, and the pump shell 11 is arranged around the cylinder body. The cylinder body in the present application can be made of stainless steel, aluminum alloy, plastic, etc. The fluid can be heated by the inner and outer surfaces of the cylinder body. Through the cylinder heating mode, the structure of the impeller is matched, the turbulence in the pump is reduced, and the efficiency of the pump is ensured not to be affected by the heating component; on the other hand, since it is a cylinder structure, the water in the heating pump 10 on both sides can be heated, thereby ensuring high heating efficiency. Through the cylinder heating mode, the pump efficiency can be consistent with the existing pump efficiency; the heating efficiency is almost the same as that of the immersion heating pump 10, and has good safety performance.

[0075] According to the dishwasher of the embodiments of the present application, the heating pump 10 described above is included. The fluid flow can be driven by the motor 13, and the heating assembly 15 is arranged in the cylinder body 12, so that the fluid can be heated by the larger surface of the cylinder body 12 to improve the heating efficiency. In addition, the heating assembly 15 arranged in the cylinder body 12 can avoid the heating assembly 15 hindering the fluid flow, reducing the resistance to the fluid, reducing the flow resistance, and improving the flow efficiency of the fluid.

[0076] In addition, the dishwasher can include an inner container, a water cup, a heating pump 10, and a spray arm, etc. The spray arm can be arranged in the inner container, and can be used to clean the tableware placed in the inner container, wherein the heating pump 10 can be arranged to be connected with the water cup and the spray arm, so as to drive the fluid to flow to the spray arm by the heating pump 10, and clean the tableware.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0078] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0079] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0081] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0082] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A heating pump for a dishwasher, comprising: a pump housing; a cylinder body, at least a portion of which is arranged in the pump housing, an inner side of the cylinder body being provided with a water inlet channel, and a heating pump cavity being provided between the cylinder body and the pump housing; a motor having a rotating shaft and being connected to the pump housing, the rotating shaft extending into the heating pump cavity; an impeller arranged in the heating pump cavity and being mounted on the rotating shaft, the impeller being opposite to the cylinder body along an axial direction; and a heating assembly arranged in the cylinder body and being disposed around the water inlet channel, the heating assembly being separated from fluid in the heating pump and being in thermal conduction with the fluid. The cylinder body comprises a first cylinder portion and a second cylinder portion arranged inside the first cylinder portion, a heating groove being formed between the first cylinder portion and the second cylinder portion, and the heating assembly being arranged in the heating groove. The cylinder body further comprises a first fairing matched with a shape of the impeller, the first fairing being arranged outside the impeller and being connected to the first cylinder portion and the second cylinder portion, and the first cylinder portion, the first fairing and the first cylinder portion being connected to form the heating groove. An inner diameter of the first cylinder portion is greater than an outer diameter of the second cylinder portion, and an end of the first cylinder portion close to the impeller extends out of the second cylinder portion, and the first fairing is configured to be inclined towards the impeller in a direction from the first cylinder portion to the second cylinder portion. An edge of the end of the first cylinder portion close to the impeller is connected to an outer periphery of the first fairing, and an edge of the end of the second cylinder portion close to the impeller is connected to an inner periphery of the first fairing. The first cylinder portion, the second cylinder portion and the first fairing are arranged in an integrated structure. The cylinder body further comprises an end plate connected to one end of the first cylinder portion close to the impeller and connected to one end of the second cylinder portion close to the impeller, and the first cylinder portion, the end plate and the first cylinder portion being connected to form the heating groove. The heating pump further comprises: a second fairing arranged outside the impeller and matched with a shape of the impeller, the second fairing being located between the impeller and the cylinder body, and the second fairing being provided with an axial interface in fluid communication with the water inlet channel. The heating pump further comprises: a flow guide cylinder connected to the axial interface of the second fairing, an inner side of the flow guide cylinder forming the water inlet channel, the flow guide cylinder being arranged in the second cylinder portion, and the heating assembly being indirectly arranged around the flow guide cylinder. An inner diameter of the axial interface is greater than an inner diameter of the flow guide cylinder, and a stepped structure is formed between the second fairing and the flow guide cylinder. An end of the flow guide cylinder away from the second fairing is configured as an inlet of the water inlet channel, or the end of the flow guide cylinder away from the second fairing extends out of the cylinder body, or the end of the flow guide cylinder away from the second fairing does not extend out of the cylinder body and is connected to an end of the second fairing through a heating pump water inlet pipe. In a projection along an axial direction of the pump housing, the cylinder body falls within the second fairing. ​ ​ ​ ​ ​ 2. The heat pump of claim 1, wherein, ​ 3. The heat pump of claim 2, wherein, ​ 4. The heat pump of claim 3, wherein, ​ ​ ​ 5. The heat pump of claim 2, wherein, ​ 6. The heat pump of claim 2 or 5, wherein, ​ ​ 7. The heat pump of claim 6, wherein, ​ ​ 8. The heat pump of claim 7, wherein, ​ 9. The heat pump according to claim 7 or 8, wherein ​ 10. The heat pump according to any one of claims 6-9, wherein, ​ 11. The heat pump of any one of claims 2-10, wherein, The cylinder further comprises a flange portion connected to one end of the first cylinder portion away from the impeller, extending radially outward and connected to the pump shell, Wherein, the pump shell comprises a first flange portion, the flange portion is connected to the first flange portion in layers; and / or, the outer periphery of the flange portion is provided with a second flange portion.

12. A dishwasher comprising the heating pump according to any one of claims 1-11.

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