Heating pump and dishwasher

Abstract

The present application relates to the technical field of kitchen heating appliances, and discloses a heating pump and a dishwasher. The heating pump comprises a pump housing, an impeller, a cover plate, and a motor. The pump housing has an impeller cavity, a liquid inlet communicated with the impeller cavity is formed at the upper end of the pump housing, a liquid outlet communicated with the impeller cavity is formed on a side portion of the pump housing, and a mounting hole communicated with the impeller cavity is formed at the lower end of the pump housing; the impeller is rotatably arranged in the impeller cavity; the cover plate is arranged to cover the mounting hole from the upper end of the mounting hole, a peripheral region of the cover plate is supported at the upper edge of the mounting hole, and the cover plate is provided with a via hole; the motor is arranged at the lower end of the pump housing, and an output shaft of the motor is connected to the impeller by means of the via hole; and a limiting structure for at least limiting upward movement of the cover plate is provided in the impeller cavity.

Description

Heating pump and dishwasher

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202411134762.0, filed on August 16, 2024, and Chinese Patent Application No. 202422003252.1, filed on August 16, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of kitchen electric appliances, in particular to a heating pump and a dishwasher. BACKGROUND

[0004] With the rapid development of technology, automatic household appliances have more functions to better serve people's lives, such as automatic dishwashers, which can drive water flow through the pump body while heating the water flow in the pump body, thereby making it easier to wash dishes and providing convenience for people's lives.

[0005] When the dishwasher is running, the motor works to drive the impeller to stir the water flow, and the heater is heated accordingly. However, after a long time, water leakage often occurs at the connection of the pump shell. SUMMARY

[0006] The main purpose of the present application is to provide a heating pump and a dishwasher, which aims to solve the problem of easy water leakage of the existing heating pump.

[0007] To achieve the above purpose, the heating pump provided by the present application comprises:

[0008] A pump shell having an impeller cavity, the upper end of the pump shell is provided with a liquid inlet communicating with the impeller cavity, the side of the pump shell is provided with a liquid outlet communicating with the impeller cavity, and the lower end of the pump shell is provided with a mounting hole communicating with the impeller cavity;

[0009] An impeller rotatably arranged in the impeller cavity;

[0010] A cover plate covering the mounting hole from the upper end of the mounting hole, and the peripheral area of the cover plate is supported at the upper end edge of the mounting hole, and the cover plate is provided with a through hole; and

[0011] A motor arranged at the lower end of the pump shell, and the output shaft of the motor is connected with the impeller through the through hole;

[0012] Wherein, at least a limiting structure for limiting the cover plate upward is arranged in the impeller cavity.

[0013] In an embodiment, the heating pump comprises a rising sleeve, the rising sleeve is located at the periphery of the impeller, and the side of the rising sleeve is provided with a communication port;

[0014] The upper end of the rising sleeve extends to the liquid inlet, and the lower end of the rising sleeve extends to abut against the cover plate.

[0015] The limiting structure comprises the rising sleeve.

[0016] In an embodiment, the rising sleeve comprises:

[0017] An upper section is arranged at the liquid inlet;

[0018] A lower section is arranged to abut against the cover plate, and the lower section is arranged to laterally extend beyond the upper section; and

[0019] A connecting section is arranged to connect between the upper section and the lower section, and gradually expand outward from top to bottom.

[0020] In an embodiment, the motor comprises a rotor, and the rotor is mounted to the mounting hole.

[0021] In an embodiment, one of the outer side of the cover plate and the inner side wall of the mounting hole is provided with a limiting protrusion, and the other is provided with a limiting groove;

[0022] The limiting structure comprises the limiting protrusion and the limiting groove.

[0023] In an embodiment, the mounting hole comprises:

[0024] An upper hole section;

[0025] A lower hole section, the upper end of the lower hole section is arranged to be inwardly recessed relative to the upper hole section to form an annular stepped surface upward between the upper hole section and the lower hole section;

[0026] The cover plate comprises:

[0027] A cover plate body is supported at the upper end edge of the upper hole section;

[0028] An annular side portion is arranged at the lower side of the cover plate body and cooperates with the upper hole section;

[0029] One of the outer side of the annular side portion and the upper hole section is provided with a limiting protrusion, and the other is provided with a limiting groove.

[0030] In an embodiment, the pump housing comprises:

[0031] A housing, the upper end of the housing is provided with an opening, the housing is provided with the liquid outlet and the mounting hole; and

[0032] A cover is arranged on the opening to form the impeller cavity together with the shell body, and the cover is provided with the liquid inlet.

[0033] In an embodiment, the heating pump further comprises a water inlet assembly, and the water inlet assembly comprises:

[0034] A rising sleeve is arranged at the periphery of the impeller, and the side of the rising sleeve is provided with a communication port, the upper end of the rising sleeve extends to the liquid inlet, and the lower end of the rising sleeve abuts against the cover plate.

[0035] A water inlet pipe is arranged at the lower end of the water inlet pipe, and is clamped between the rising sleeve and the cover.

[0036] In an embodiment, the shell body is integrally formed.

[0037] The application further provides a dishwasher comprising a heating pump, and the heating pump comprises:

[0038] A pump shell having an impeller cavity, the upper end of the pump shell is provided with a liquid inlet communicating with the impeller cavity, the side of the pump shell is provided with a liquid outlet communicating with the impeller cavity, and the lower end of the pump shell is provided with a mounting hole communicating with the impeller cavity.

[0039] An impeller is arranged in the impeller cavity.

[0040] A cover plate is arranged in the mounting hole from the upper end of the mounting hole, and the peripheral area of the cover plate is supported at the upper end edge of the mounting hole, and the cover plate is provided with a through hole.

[0041] A motor is arranged at the lower end of the pump shell, and the output shaft of the motor is connected with the impeller through the through hole.

[0042] At least a limiting structure is arranged in the impeller cavity to limit the cover plate upwardly. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0044] Fig. 1 is a cross-sectional view of an embodiment of the heating pump provided by the present application;

[0045] Fig. 2 is a cross-sectional view of part of the structure of the heating pump in Fig. 1;

[0046] Fig. 3 is an enlarged view of the portion A in Fig. 2;

[0047] Fig. 4 is a schematic view of the housing in Fig. 1 in cross-section.

[0048] BRIEF DESCRIPTION OF DRAWINGS

[0049] 100, heating pump; 1, pump shell; a, impeller cavity; b, liquid inlet; c, liquid outlet; d, mounting hole; d1, upper hole section; d2, lower hole section; 11, housing; 12, cover; 2, impeller; 3, cover plate; e, via hole; 31, cover plate main body; 32, annular side; 4, motor; 41, rotor; 5, expansion sleeve; 51, upper section; 52, lower section; 53, connecting section; 61, limiting protrusion; 62, limiting groove; 7, water inlet pipe.

[0050] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings. Embodiment of the present application

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0052] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0053] In addition, if the embodiments of the present application involve descriptions such as “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel solutions are included, taking “A and / or B” as an example, including A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0054] With the rapid development of science and technology, automatic household appliances have more functions to better serve people's life, such as automatic dishwashers, which can realize water flow driven by a pump body and heating of water flow in the pump body, so as to more conveniently wash dishes and provide convenience for people's life. When the dishwasher is running, the motor works to drive the impeller to stir the water flow, and the heater is heated accordingly. However, after a long time, the connection of the pump shell often has a water leakage problem.

[0055] In the related art, in order to provide stable support for the output shaft of the motor, the cover plate is fixed by clamping. In order to make the structure simple, the pump shell is divided into two parts, one of which is mainly used for motor installation, and the other is used for impeller placement. The two half shells are buckled to form an impeller cavity. In order to ensure the sealing between the two half shells, a sealing gasket is provided between the two half shells. However, the sealing ring or gasket and other sealing materials will gradually age and lose elasticity or deformation over time, resulting in a decrease in sealing performance. In addition, the change in temperature will affect the expansion coefficient of the material, causing the fitting gap between the two half shells to change. In particular, in the process of thermal expansion and contraction, the original sealing effect may be affected. In addition, the sudden change in pressure during start-up and shutdown may cause additional pressure on the seal. The above factors will cause leakage.

[0056] The present application provides a heating pump to solve the problem of water leakage in the existing heating pump. Figure 1 is a cross-sectional view of an embodiment of the heating pump provided by the present application; Figure 2 is a cross-sectional view of part of the structure of the heating pump in Figure 1; Figure 3 is a local enlarged view of A in Figure 2; and Figure 4 is a cross-sectional view of the shell in Figure 1.

[0057] Please refer to Figures 1 to 2. In an embodiment of the present application, the heating pump 100 comprises a pump shell 1, an impeller 2, a cover plate 3 and a motor 4. The pump shell 1 has an impeller cavity a. The upper end of the pump shell 1 is provided with a liquid inlet b communicating with the impeller cavity a. The side of the pump shell 1 is provided with a liquid outlet c communicating with the impeller cavity a. The lower end of the pump shell 1 is provided with a mounting hole d communicating with the impeller cavity a. The impeller 2 is rotatably arranged in the impeller cavity a. The cover plate 3 covers the mounting hole d from the upper end of the mounting hole d and is supported at the upper end edge of the mounting hole d. The cover plate 3 is provided with a through hole e. The motor 4 is arranged at the lower end of the pump shell 1, and the output shaft of the motor 4 is connected with the impeller 2 through the through hole e. The impeller cavity a is provided with a limiting structure for limiting the cover plate 3 upwardly.

[0058] The pump shell 1 is the main part of the heating pump 100, the inside of the pump shell 1 forms a space for accommodating the impeller 2, i.e. the impeller cavity a. The liquid inlet b is an opening provided on the upper end of the pump shell 1 for introducing the liquid to be pumped. The liquid outlet c is an opening provided on the side of the pump shell 1 for discharging the liquid pressurized by the impeller 2. The mounting hole d is an opening provided on the lower end of the pump shell 1 for mounting the cover plate 3 and connecting the motor 4

[0059] The motor 4 provides power, and the output shaft thereof is connected with the impeller 2 to drive the rotation of the impeller 2. The impeller 2 is the core component of the pump for driving the flow of fluid.

[0060] The through hole e provided on the cover plate 3 is used for the output shaft of the motor 4 to pass through and be connected with the impeller 2. The cover plate 3 is located at the lower end of the pump shell 1 and is supported at the upper end edge of the mounting hole d, which is used for downward limiting of the cover plate 3 to ensure that the cover plate 3 does not move downward during the working process.

[0061] The limiting structure is a structure provided in the impeller cavity a for upward limiting of the cover plate 3 to prevent the cover plate 3 from moving upward due to vibration and other reasons, thereby affecting the sealing performance and the performance of the pump. The limiting structure can be an annular boss structure provided on the inner wall of the impeller cavity a and located on the upper side of the cover plate 3, or a buckle structure provided between the cover plate 3 and the pump shell 1, or a screw structure provided between the cover plate 3 and the pump shell 1. Of course, the limiting structure is not limited to the above examples, and the skilled person in the art may, under the inspiration of the technical essence of the embodiments of the present application, make other changes, as long as the functions and effects achieved are the same or similar to those of the embodiments of the present application, which should be covered within the protection scope of the embodiments of the present application.

[0062] In the technical solution of the present application, the heating pump 100 includes the motor 4 provided at the lower end of the pump shell 1, the motor 4 drives the rotation of the impeller 2, and the liquid entering the impeller cavity a from the liquid inlet b is discharged from the liquid outlet c. When the output shaft of the motor 4 is connected with the impeller 2 by penetrating the through hole e provided on the cover plate 3, the cover plate 3 is stably limited at the upper end of the mounting hole d by the limiting structure during the working of the heating pump 100, so as to avoid the cover plate 3 from being moved by the liquid in the impeller cavity a, thereby providing stable radial support for the output shaft of the motor 4. By directly covering the cover plate 3 on the mounting hole d and limiting the cover plate 3 by the limiting structure provided in the impeller cavity a, the cover plate 3 is not clamped and fixed by the two housings 11, thereby avoiding the possibility of leakage between the two housings 11.

[0063] In the embodiment, the heating pump 100 comprises a rising sleeve 5 located at the periphery of the impeller 2, and the side of the rising sleeve 5 is provided with a communication port; the upper end of the rising sleeve 5 extends to the liquid inlet b, and the lower end of the rising sleeve 5 abuts against the cover plate 3; the limiting structure comprises the rising sleeve 5.

[0064] The rising sleeve 5 is located at the periphery of the impeller 2, that is, surrounds the outside of the impeller 2. The side of the rising sleeve 5 is provided with a communication port for the flow of liquid. The upper end of the rising sleeve 5 extends to the liquid inlet b of the pump shell 1, so that the liquid entering from the liquid inlet b can directly flow into the inside of the rising sleeve 5. When the impeller 2 rotates, the liquid in the inside of the rising sleeve 5 can be transported to the liquid outlet c through the communication port.

[0065] In the related art, because the liquid inlet is communicated with the water inlet pipe, in order to fix the water inlet pipe with the pump shell, a rising sleeve is generally arranged in the water inlet pipe, so that the water inlet pipe is clamped between the periphery of the liquid inlet of the pump shell and the rising sleeve.

[0066] In the embodiment, by extending the lower end of the rising sleeve 5 to abut against the cover plate 3, the lower end of the rising sleeve 5 contacts the cover plate 3, so that the cover plate 3 is pressed at the upper end edge of the mounting hole d. The lower end of the rising sleeve 5 not only has the function of fixing the water inlet pipe 7, but also has the function of limiting the upward movement of the cover plate 3.

[0067] In the embodiment, the rising sleeve 5 comprises an upper section 51, a lower section 52 and a connecting section 53, the upper section 51 is arranged at the liquid inlet b, the lower end abuts against the cover plate 3, and the lower section 52 laterally exceeds the upper section 51, the connecting section 53 connects between the upper section 51 and the lower section 52, and is gradually outwardly expanded from top to bottom.

[0068] The upper section 51 is located at the upper part of the rising sleeve 5 and arranged at the liquid inlet b of the pump shell 1. The lower section 52 is located at the lower part of the rising sleeve 5 and abuts against the cover plate 3. The connecting section 53 connects between the upper section 51 and the lower section 52 and is gradually outwardly expanded from top to bottom. The upper section 51 is arranged at the liquid inlet b, so that the liquid entering from the liquid inlet b can directly enter the inside of the rising sleeve 5, and the upper section 51 can serve as the first channel for the liquid to enter the impeller cavity a, which helps to control the inflow of the liquid. The lower section 52 abuts against the cover plate 3 and limits the upward movement of the cover plate 3. The lower section 52 laterally exceeds the upper section 51, that is, the diameter of the lower section 52 is larger than that of the upper section 51.

[0069] The lower section 52 of the expansion sleeve 5 is provided with a larger diameter, and a larger abutting surface is formed between the cover plate 3 and the lower section 52, so that the cover plate 3 can be better supported, and the stability of the expansion sleeve 5 is improved, and the structural strength of the expansion sleeve 5 is also improved to a certain extent.

[0070] Specifically, in the embodiment, the motor 4 comprises a rotor 41, which is installed in the mounting hole d.

[0071] The motor 4 is a brushless motor 4, the rotor 41 of the motor 4 is installed in the mounting hole d, and the stator of the motor 4 is fixed to the periphery of the lower end of the pump shell 1 by means of buckling or screw connection after being plastic encapsulated, the stator interacts with the rotor 41 after being energized, and the rotor 41 drives the output shaft to rotate.

[0072] The diameter of the rotor 41 is smaller than the diameter of the impeller 2, so that a stepped portion is formed at the position where the impeller cavity a communicates with the mounting hole d, and the installation structure is simplified by supporting the cover plate 3 at the upper end edge of the mounting hole d for installing the rotor 41.

[0073] Further, referring to FIGS. 2 to 4, in the embodiment, one of the outer side of the cover plate 3 and the inner side wall of the mounting hole d is provided with a limiting protrusion 61, and the other is provided with a limiting groove 62; the limiting structure comprises the limiting protrusion 61 and the limiting groove 62.

[0074] The limiting protrusion 61 is arranged on one of the outer side of the cover plate 3 and the inner side wall of the mounting hole d. The limiting groove 62 is arranged on the side opposite to the limiting protrusion 61, that is, if the limiting protrusion 61 is arranged on the outer side of the cover plate 3, the limiting groove 62 is arranged on the inner side wall of the mounting hole d; otherwise.

[0075] When the cover plate 3 is installed in the mounting hole d of the pump shell 1, the limiting protrusion 61 is aligned with and embedded in the limiting groove 62, so that the correct position and stability of the cover plate 3 are ensured. Since the limiting groove 62 stops the limiting protrusion 61 from moving upward, the limiting groove 62 further assists in limiting the upward movement of the cover plate 3.

[0076] In the embodiment, the mounting hole d comprises an upper hole section d1 and a lower hole section d2, the upper end of the lower hole section d2 is inwardly set relative to the upper hole section d1 to form an annular stepped surface upward between the upper hole section d1 and the lower hole section d2; the cover plate 3 comprises a cover plate body 31 and an annular side 32, the cover plate body 31 is supported on the upper end edge of the upper hole section d1; the annular side 32 is arranged on the lower side of the cover plate body 31 and cooperates with the upper hole section d1; one of the outer side of the annular side 32 and the upper hole section d1 is provided with a limiting protrusion 61, and the other is provided with a limiting groove 62.

[0077] The cover plate body 31 is provided with the through hole e and arranged at the bottom of the impeller cavity a. The annular side 32 is an annular structure below the cover plate body 31 and is used to cooperate with the mounting hole d. The cover plate body 31 is supported on the upper end edge of the upper hole section d1. The annular side 32 cooperates with the upper hole section d1.

[0078] When the cover plate 3 is installed to the mounting hole d of the pump shell 1, the cover plate body 31 is supported on the upper end edge of the upper hole section d1, and the annular side 32 cooperates with the upper hole section d1. The limiting protrusion 61 is aligned with the limiting groove 62 and embedded therein, which ensures the correct position and stability of the cover plate 3.

[0079] In this way, the limiting protrusion 61 or the limiting groove 62 is arranged on the annular side 32, which provides a layout position for the limiting protrusion 61 or the limiting groove 62, and the limiting protrusion 61 or the limiting groove 62 is not limited by the thickness of the cover plate body 31.

[0080] The limiting groove 62 is arranged as an annular groove, when the annular groove is arranged along the circumferential direction of the lower hole section d2, the limiting protrusion 61 can be arranged in plurality, the plurality of limiting protrusions 61 are arranged along the circumferential direction of the annular side 32, and the plurality of limiting protrusions cooperate with the annular groove, which facilitates assembly, and the plurality of limiting protrusions can cooperate more stably, and material can be saved.

[0081] Further, in the embodiment, the pump shell 1 comprises a shell 11 and a cover 12, the upper end of the shell 11 is provided with an opening, the shell 11 is provided with the liquid outlet c and the mounting hole d; the cover 12 is arranged on the opening, the cover 12 and the shell 11 form the impeller cavity a, and the cover 12 is provided with the liquid inlet b.

[0082] Since the rotor 41 of the motor 4 is arranged in the mounting hole d in the pump housing 1, when assembling, in order to facilitate the installation of the rotor 41, the rotor 41 can be placed in the mounting hole d from the opening, and then the cover 12 of the water inlet assembly is covered on the opening of the housing 11 to form the impeller cavity a.

[0083] The cover 12 and the housing 11 can be fixed by a buckle structure or a screw connection structure. In order to avoid leakage between the cover 12 and the housing 11, a sealing gasket is arranged between the cover 12 and the housing 11 for sealing.

[0084] In the embodiment, the heating pump 100 further comprises a water inlet assembly, the water inlet assembly comprises a sleeve 5 and a water inlet pipe 7, the sleeve 5 is located at the periphery of the impeller 2, and the side of the sleeve 5 is provided with a communication port, the upper end of the sleeve 5 extends to the liquid inlet b, and the lower end of the sleeve 5 extends to abut against the cover plate 3; the lower end of the water inlet pipe 7 is arranged in the liquid inlet b and clamped between the sleeve 5 and the cover 12.

[0085] In the related art, when assembling the heating pump, a sealing gasket is arranged between the cover and the half housing, the cover of the water inlet assembly is covered on the half housing, the cover and the half housing are buckled, then the rotor is installed in the other half housing, another sealing ring and the cover plate are arranged between the two half housings, and the two half housings are assembled through the assembly structure, the cover plate is clamped between the two half housings, and the place is resealed through the sealing ring.

[0086] In the scheme of the embodiment, when the cover 12 and the housing 11 are assembled, the lower end of the sleeve 5 can abut against the cover plate 3 at the same time that the cover 12 and the housing 11 are installed in place, and the assembly is more convenient. There is no need to additionally arrange a sealing ring, and the assembly cost is reduced.

[0087] In the embodiment, the housing 11 is integrally formed. Integrally formed means that the housing 11 is an integral structure made of a single material and formed by casting, injection molding, stamping or the like at one time, instead of being assembled by a plurality of separate parts. In this way, the assembly step in the production process can be reduced, and the production cost is reduced. At the same time, the joint inside the housing 11 is reduced, which helps to improve the sealing performance of the housing 11 and reduce leakage.

[0088] The application also provides a dishwasher, which comprises a water tank and a heating pump 100, the specific structure of which is referred to the above-mentioned embodiments. Since the dishwasher adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0089] The above merely describes exemplary embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made by referring to the content of the specification and drawings, or direct / indirect application in other related technical fields under the technical concept of the application is included in the patent protection scope of the application.

Claims

1. A heat pump, wherein, The heating pump comprises: a pump shell having an impeller cavity, an upper end of the pump shell being provided with a liquid inlet communicating with the impeller cavity, a side of the pump shell being provided with a liquid outlet communicating with the impeller cavity, and a lower end of the pump shell being provided with a mounting hole communicating with the impeller cavity; an impeller rotatably arranged in the impeller cavity; a cover plate covering the mounting hole from an upper end of the mounting hole and supported at an upper end edge of the mounting hole, the cover plate being provided with a through hole; and a motor arranged at the lower end of the pump shell, and an output shaft of the motor being connected with the impeller through the through hole. At least a limiting structure is arranged in the impeller cavity to limit the cover plate upwardly.

2. The heat pump of claim 1, wherein, The heating pump comprises a rising sleeve, the rising sleeve being located at the periphery of the impeller, and a side of the rising sleeve being provided with a communicating port. An upper end of the rising sleeve extends to the liquid inlet, and a lower end of the rising sleeve extends to abut against the cover plate. The limiting structure comprises the rising sleeve.

3. The heat pump of claim 2 wherein, The rising sleeve comprises: an upper section arranged at the liquid inlet; a lower section arranged to abut against the cover plate, and the lower section laterally extending beyond the upper section; and a connecting section connecting between the upper section and the lower section, and gradually expanding outwardly from top to bottom.

4. The heat pump of any one of claims 1 to 3, wherein, The motor comprises a rotor, and the rotor is mounted in the mounting hole.

5. The heat pump of any one of claims 1 to 4, wherein, One of an outer side of the cover plate and an inner side wall of the mounting hole is provided with a limiting protrusion, and the other is provided with a limiting groove. The limiting structure comprises the limiting protrusion and the limiting groove.

6. The heat pump as set forth in claim 5, wherein, The mounting hole comprises: an upper hole section; a lower hole section, an upper end of the lower hole section being inwardly recessed relative to the upper hole section to form an annular stepped surface upwardly between the upper hole section and the lower hole section. The cover plate comprises: a cover plate body supported at an upper end edge of the upper hole section; an annular side arranged at a lower side of the cover plate body and matched with the upper hole section; one of an outer side of the annular side and the upper hole section is provided with a limiting protrusion, and the other is provided with a limiting groove.

7. The heat pump of any one of claims 1 to 6, wherein, The pump shell comprises: a shell body, an upper end of the shell body being provided with an opening, the shell body being provided with the liquid outlet and the mounting hole; and a cover body covering the opening to form the impeller cavity together with the shell body, the cover body being provided with the liquid inlet.

8. The heat pump of claim 7 wherein, The heating pump further comprises a water inlet assembly, and the water inlet assembly comprises: a rising sleeve, the rising sleeve being located at the periphery of the impeller, and a side of the rising sleeve being provided with a communicating port, an upper end of the rising sleeve extending to the liquid inlet, and a lower end of the rising sleeve extending to abut against the cover plate; and a water inlet pipe, a lower end of the water inlet pipe being arranged in the liquid inlet and clamped between the rising sleeve and the cover body.

9. The heat pump as claimed in claim 7 or 8, wherein, The shell body is integrally formed.

10. A dishwasher, wherein, The dishwasher comprises the heating pump according to any one of claims 1 to 9.

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