Stator assembly, driving device, fan water pump assembly and water heater

Abstract

The utility model discloses a stator assembly, a driving device, a fan water pump assembly and a water heater, and relates to the technical field of driving. Wherein the stator assembly comprises a stator iron core, a first winding and a second winding, the stator iron core comprises an annular yoke part, a plurality of inner teeth arranged on the inner circumference of the annular yoke part and a plurality of outer teeth arranged on the outer circumference of the annular yoke part, a first stator groove is formed between every two adjacent outer teeth, and a second stator groove is formed between every two adjacent inner teeth; the notch width of the first stator slot is equal to that of the second stator slot; the first winding is correspondingly wound on the outer teeth; the second winding is correspondingly wound on the inner teeth, and the second winding and the first winding are configured to be controlled independently. According to the technical scheme, one driving device has two kinds of power output, the size of the driving device is reduced, and the installation space of the driving device in electrical equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive technical field especially relates to a stator assembly, drive arrangement, fan water pump assembly and water heater. BACKGROUND

[0002] In the related art, some electric appliances with two working structures (such as a fan wheel and an impeller) are usually driven by separate motors, each motor includes a stator and a rotor that operates independently, but two motors occupy a large space, resulting in a large size of the electric appliance and a large installation space, and twice installation is required during installation, which is low in assembly efficiency. SUMMARY

[0003] The utility model discloses a stator assembly, drive arrangement, fan water pump assembly and water heater, which has two power outputs, integrates the fan and the water pump, shares the same drive arrangement, reduces the size and installation space, and improves the assembly efficiency.

[0004] To achieve the above object, the utility model provides a kind of stator assembly, comprising:

[0005] Stator core, including annular yoke portion, multiple inner teeth arranged in the inner periphery of the annular yoke portion and multiple outer teeth arranged on the outer periphery of the annular yoke portion, first stator slot is formed between adjacent two outer teeth, second stator slot is formed between adjacent two inner teeth, the slot width of the first stator slot is equal to the slot width of the second stator slot;

[0006] First winding, corresponding to the outer teeth;

[0007] Second winding, corresponding to the inner teeth, the second winding and the first winding are configured to be independently controllable.

[0008] In an embodiment of the present application, the annular yoke portion comprises:

[0009] First yoke portion, multiple outer teeth are arranged on the outer periphery of the first yoke portion;

[0010] Second yoke portion, arranged on the inner periphery of the first yoke portion, multiple inner teeth are arranged on the outer periphery of the second yoke portion;And

[0011] Magnetic barrier structure, arranged between the first yoke portion and the second yoke portion.

[0012] In an embodiment of the present application, the magnetic barrier structure is a plurality of air gaps formed between the first yoke portion and the second yoke portion, and the plurality of air gaps are distributed along the circumferential direction of the annular yoke portion;

[0013] A magnetic bridge connecting the first yoke and the second yoke is provided between two adjacent air gaps.

[0014] In one embodiment of this application, the stator core is a chain structure formed by connecting multiple core portions end to end. Each core portion has a yoke and internal teeth and external teeth respectively disposed on the inner and outer sides of the yoke. The multiple yoke portions are rolled into a ring-shaped yoke.

[0015] In one embodiment of this application, the external tooth includes a tooth portion and an outer pole shoe portion, the tooth portion is connected to the yoke portion, and the outer pole shoe portion is inserted into and assembled with the outer side wall of the tooth portion.

[0016] In one embodiment of this application, the inner diameter D2 of the inner tooth and the outer diameter D1 of the outer tooth satisfy the following condition: 0.35≤D2 / D1≤0.55;

[0017] And / or, the inner diameter D2 of the internal teeth satisfies: 20mm≤D2≤40mm;

[0018] And / or, the outer diameter D1 of the external tooth satisfies: 40mm≤D1≤70mm;

[0019] And / or, the slot width B2 of the second stator slot and the inner diameter D2 of the internal tooth satisfy: 0.06≤B2 / D2≤0.1.

[0020] In one embodiment of this application, the stator assembly further includes a stator frame, the stator frame comprising two frame bodies respectively installed at opposite ends of the stator core, the frame body comprising:

[0021] A ring-shaped support covers the ring-shaped yoke;

[0022] Multiple first slot insulating portions are spaced apart on the outer peripheral surface of the annular bracket and are correspondingly inserted into the first stator slots; and

[0023] Multiple second slot insulating portions are spaced apart on the inner circumferential surface of the annular bracket for corresponding insertion into the second stator slots;

[0024] The first winding is wound on the first slot insulation portion, and the second winding is wound on the second slot insulation portion.

[0025] In one embodiment of this application, the axial end face of the annular bracket is provided with a wiring groove, the outer wall of the wiring groove is provided with a first wire passage opening, and the inner wall of the wiring groove is provided with a second wire passage opening. The first wire passage opening connects the wiring groove with the inner cavity of the first groove insulation part, and the second wire passage opening connects the wiring groove with the inner cavity of the second groove insulation part.

[0026] In one embodiment of this application, the first cable port and the second cable port are arranged opposite to each other.

[0027] In one embodiment of this application, a first winding portion is provided between two adjacent first slot insulating portions. One end of the first winding portion is connected to the outer peripheral wall of the annular bracket, and the other end extends radially outward toward the annular bracket. A first insulating cover for covering the end of the external teeth is provided at the end of the first winding portion away from the annular bracket.

[0028] And / or, a second winding portion is provided between two adjacent second slot insulating portions, one end of the second winding portion is connected to the inner peripheral wall of the annular bracket, and the other end extends toward the center of the annular bracket; a second insulating cover for covering the end of the inner tooth is provided at the end of the second winding portion away from the annular bracket.

[0029] In one embodiment of this application, the annular bracket is configured to be spliced ​​together by multiple sub-modules along the circumference, and each sub-module is provided with the first groove insulation part and the second groove insulation part on the outer and inner sides in the radial direction, respectively;

[0030] Alternatively, the stator frame may be a one-piece molded structure.

[0031] To achieve the above objectives, this application also provides a driving device, comprising:

[0032] The base includes an end face flange and an annular support disposed at one axial end of the end face flange. The annular support is provided with a first receiving groove and a second receiving groove that are spaced apart along the axial direction.

[0033] The aforementioned stator assembly is fitted onto the outer periphery of the annular bracket at the portion corresponding to the second receiving groove;

[0034] A first rotor, disposed around the periphery of the stator assembly and opposite to the external teeth, is supported by a first support shaft mounted in the first receiving groove; and

[0035] The second rotor is installed in the second receiving slot and is opposite to the internal teeth.

[0036] In one embodiment of this application, the stator assembly has a first side close to the end face flange and a second side away from the end face flange in the axial direction of the end face flange, and the first receiving groove protrudes axially from the second side of the stator assembly.

[0037] To achieve the above objectives, this application also provides a fan and water pump assembly, characterized in that it comprises:

[0038] The aforementioned drive device;

[0039] The wind turbine is driven and connected to the first rotor; and

[0040] The water turbine is driven and connected to the second rotor.

[0041] In one embodiment of this application, the water turbine and the wind turbine are respectively located on opposite axial sides of the end face flange.

[0042] In one embodiment of this application, the first rotor includes:

[0043] A rotor housing is fitted around the stator assembly and fixedly connected to the wind turbine; one end of the first support shaft is installed in the first receiving groove, and the other end is fixed to the rotor housing and / or the wind turbine; and

[0044] The first magnetic ring is disposed on the inner circumferential surface of the rotor housing and is positioned opposite to the outer teeth.

[0045] In one embodiment of this application, the rotor housing includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion connected in a stepped manner along the axial direction. The first cylindrical portion is correspondingly sleeved on the periphery of the stator assembly. The first magnetic ring is disposed on the inner circumferential surface of the first cylindrical portion. The second cylindrical portion is correspondingly sleeved on the periphery of the first receiving groove. The third cylindrical portion is located on the side of the first receiving groove that is axially opposite to the second receiving groove.

[0046] The wind turbine is installed on the outside of the second cylindrical section and the third cylindrical section;

[0047] The first support shaft passes through the third cylindrical section and is fixed to the wind turbine by a locking member.

[0048] In one embodiment of this application, the outer diameter of the stator assembly is larger than the outer diameter of the second cylindrical portion, and the outer diameter of the stator assembly is smaller than the outer diameter of the wind turbine.

[0049] In one embodiment of this application, the outer diameter of the first rotor is smaller than the outer diameter of the wind turbine.

[0050] In one embodiment of this application, the portion in the rotor housing used to install the wind turbine is defined as the mounting portion, and the outer periphery of the mounting portion gradually expands in a trumpet shape from the end away from the end face flange to the portion near the stator assembly.

[0051] In one embodiment of this application, the rotor housing and the wind turbine are an integral structure;

[0052] Alternatively, the first rotor and the wind turbine can be fixed as a single unit.

[0053] In one embodiment of this application, a volute is further included, the volute and the base enclose a wind cavity, and the impeller, the stator assembly and the first rotor are all located within the wind cavity;

[0054] The volute and the stator assembly are packaged into an integral structure; or, the volute, the stator assembly, and the base are packaged into an integral structure; or, the stator assembly and the base are packaged into an integral structure.

[0055] In one embodiment of this application, a second support shaft is fixedly installed in the second receiving groove, and the second rotor and / or the water wheel slides around the outer periphery of the second support shaft;

[0056] The second rotor includes a bushing, a second rotating shaft, and a second magnetic ring, which are sequentially sleeved outside the second support shaft from the inside to the outside. The second magnetic ring is located in the second receiving groove and is disposed opposite to the stator assembly. The second rotating shaft extends out of the second receiving groove and is connected to the water turbine.

[0057] In one embodiment of this application, a pump housing is further included, wherein the pump housing and the end face flange are sealed together to form a pump cavity for accommodating the water turbine;

[0058] The annular bracket is provided with a partition that separates the first accommodating groove and the second accommodating groove. The partition is provided with a first mounting hole. The pump housing is provided with a second mounting hole opposite to the first mounting hole. The two ends of the second support shaft are respectively inserted into the first mounting hole and the second mounting hole.

[0059] In one embodiment of this application, the second rotating shaft and the water turbine are an integral structure;

[0060] Alternatively, the second rotor and the water turbine can be injection molded as a single unit.

[0061] To achieve the above objectives, this application also provides a water heater, comprising:

[0062] Flue system;

[0063] A water system for heat exchange with the flue system; and

[0064] The aforementioned fan and water pump assembly is connected to both the flue system and the water system. The fan impeller drives the airflow along the flue system, and the water impeller drives the water flow along the water system.

[0065] The technical solution of this application involves providing multiple internal teeth on the inner circumference of the annular yoke, with a second stator slot formed between each pair of adjacent internal teeth. Similarly, multiple external teeth are provided on the outer circumference of the annular yoke, with a first stator slot formed between each pair of adjacent external teeth. Different first and second stator windings can be wound within these first and second stator slots, respectively. When the first and second windings are energized, two independent magnetic fields are generated on the radially outer and inner sides of the annular yoke. When applied to a drive device, these two independent magnetic fields can drive two different rotors to operate, providing two different outputs. Therefore, when applied to electrical equipment, one drive device can drive two different working structures without the need for two separate motors, thereby reducing the overall size and installation space.

[0066] Furthermore, by setting the slot width of the first stator slot to be equal to that of the second stator slot, the magnetic flux distribution of the first and second stator slots can be made more uniform, which helps to reduce the concentration of local magnetic flux, thereby reducing cogging torque and electromagnetic vibration, and improving the smoothness of motor operation; at the same time, it can also reduce electromagnetic noise. Attached Figure Description

[0067] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0068] Figure 1 This is a schematic diagram of the structure of an embodiment of the stator core in this application;

[0069] Figure 2 This is a schematic diagram of another embodiment of the stator core in this application;

[0070] Figure 3 for Figure 2 Parameter labeling diagram of the embodiment;

[0071] Figure 4 This is a schematic diagram of the structure of yet another embodiment of the stator core in this application;

[0072] Figure 5 This is a schematic diagram of the structure of another embodiment of the stator core in this application;

[0073] Figure 6 This is a schematic diagram of the stator core chain structure in this application;

[0074] Figure 7 This is a schematic diagram of the assembly structure of the outer pole shoe and the toothed part in this application;

[0075] Figure 8 for Figure 6 A schematic diagram of the stator core structure in the embodiment;

[0076] Figure 9 This is a schematic diagram of the structure of one embodiment of the stator frame in this application;

[0077] Figure 10 This is a schematic diagram of the skeleton body in this application;

[0078] Figure 11 This is a schematic diagram of the structure of an embodiment of the stator assembly in this application;

[0079] Figure 12 This is a full sectional view of an embodiment of the stator assembly in this application;

[0080] Figure 13 This is an exploded view of an embodiment of the stator assembly in this application;

[0081] Figure 14 and Figure 15 This is a schematic diagram of the structure of an embodiment of the fan and water pump assembly of this application;

[0082] Figure 16 This is a schematic diagram of the base structure in an embodiment of this application;

[0083] Figure 17 This is an exploded structural diagram of an embodiment of the volute and stator assembly BMC packaged together in this application;

[0084] Figure 18 This is a schematic diagram of another embodiment of the fan and water pump assembly of this application;

[0085] Figure 19 for Figure 18 Exploded view of the embodiment of the middle stator assembly and base potting encapsulation;

[0086] Figure 20 This is a schematic diagram of the structure of yet another embodiment of the fan and water pump assembly of this application;

[0087] Figure 21 for Figure 20 A schematic diagram of the base structure in the embodiment;

[0088] Figure 22 This is a schematic diagram showing the engagement of the stator assembly with the first rotor and the second rotor in this application;

[0089] Figure 23 This is a schematic diagram of the second rotor and water turbine integrated structure embodiment in this application.

[0090] Explanation of icon numbers:

[0091]

[0092]

[0093] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0094] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0095] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0096] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0097] Furthermore, if the embodiments of this utility model involve descriptions such as "second" or "first," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "second" or "first" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0098] This utility model proposes a stator assembly designed to provide two independent sets of coil windings by setting radially independent stator slots on both the inner and outer sides. This generates two independent magnetic fields to drive different rotors, enabling a single drive device to function as two output terminals. When applied to electrical equipment, one drive device can drive two different working structures without the need for two separate motors, thereby reducing the overall size and installation space. It should be noted that the electrical equipment in this embodiment is not limited to a specific type of device; for example, it could be a water heater, a heating furnace, an air conditioner, etc. The structure of the stator assembly 2 of this application will be described below by way of an embodiment.

[0099] like Figures 1 to 11 The stator assembly 2 includes a stator core 21, a first winding 23, and a second winding 24.

[0100] The stator core 21 includes an annular yoke 211, a plurality of internal teeth 212 disposed on the inner periphery of the annular yoke 211, and a plurality of external teeth 213 disposed on the outer periphery of the annular yoke 211. A first stator slot 213a is formed between two adjacent external teeth 213, and a second stator slot 212a is formed between two adjacent internal teeth 212. The slot width of the first stator slot 213a is equal to the slot width of the second stator slot 212a. A first winding 23 is wound on the external teeth 213. A second winding 24 is wound on the internal teeth 212. The second winding 24 and the first winding 23 are configured to be independently controllable.

[0101] In this embodiment, multiple internal teeth 212 are provided on the inner circumference of the annular yoke 211, and a second stator slot 212a is formed between each two adjacent internal teeth 212. Multiple external teeth 213 are provided on the outer circumference of the annular yoke 211, and a first stator slot 213a is formed between each two adjacent external teeth 213. Different first windings 23 and second windings 24 can be wound in the first windings 23 and second windings 24, respectively. When three-phase alternating current is applied to the first windings 23 and second windings 24, two independent magnetic fields can be generated on the radial outer and inner sides of the annular yoke 211. When applied to a drive device such as a motor, the two independent magnetic fields can drive two different rotors to operate, providing two different outputs. Therefore, when applied to electrical equipment, one drive device can drive two different working structures to operate, without the need for two separate motors, thereby reducing the overall size and installation space.

[0102] Understandably, in this embodiment, the slot opening of the second stator slot 212a is an opening facing the center of the stator core 21, and the slot opening width B2 is the gap width between two adjacent internal teeth 212 on their inner circumferential surfaces; the slot opening of the first stator slot 213a is an opening facing radially outward, and the slot opening width B1 is the gap width between two adjacent external teeth 213 on their outer circumferential surfaces. By setting the slot opening width B2 of the second stator slot 212a to be equal to the slot opening width B1 of the first stator slot 213a, the magnetic flux distribution of the second stator slot 212a and the first stator slot 213a can be made more uniform, which helps to reduce the concentration of local magnetic flux density, thereby reducing cogging torque and electromagnetic vibration, and improving the smoothness of motor operation; at the same time, it can also reduce electromagnetic noise.

[0103] Optionally, the number of internal teeth 212 is different from the number of external teeth 213.

[0104] Optionally, the number of internal teeth 212 is the same as the number of external teeth 213, and the internal teeth 212 and external teeth 213 are opposite or misaligned.

[0105] Please see Figures 1 to 5 In one embodiment of this application, the annular yoke 211 includes a first yoke 2111, a second yoke 2112, and a magnetic barrier structure 2113. A plurality of internal teeth 212 are arranged in a ring around the inner peripheral surface of the second yoke 2112, the first yoke 2111 is arranged on the outer periphery of the second yoke 2112, and a plurality of external teeth 213 are arranged in a ring around the outer peripheral surface of the first yoke 2111. The magnetic barrier structure 2113 is arranged between the first yoke 2111 and the second yoke 2112.

[0106] In this embodiment, a magnetic barrier structure 2113 is provided between the first yoke 2111 and the second yoke 2112 to separate the inner teeth 212 and the outer teeth 213 radially. When the first winding 23 and the second winding 24 are energized, the magnetic barrier structure 2113 can reduce the penetration of magnetic lines of force, so that the paths of the magnetic lines of force will exist between multiple inner teeth 212 and the corresponding inner rotor, and between multiple outer teeth 213 and the corresponding outer rotor, thereby avoiding mutual influence between the inner and outer magnetic fields, and thus improving the operational stability and independence of the corresponding inner rotor and outer rotor.

[0107] Optionally, the magnetic barrier structure 2113 can be made of materials with low magnetic permeability, such as plastic, rubber, acrylic, copper, aluminum, or air. Optionally, the magnetic barrier structure 2113 can be a ring structure, multiple spaced magnetic barrier segments, or some other shape structure.

[0108] In practical applications, considering factors such as magnetic permeability and the ease of molding process, as an example, the magnetic barrier structure 2113 consists of multiple air gaps 2113a formed on the annular yoke 211. These air gaps 2113a are distributed circumferentially along the annular yoke 211, radially dividing the annular yoke 211 into a first yoke 2111 and a second yoke 2112. In this embodiment, the air gaps 2113a are air magnetic barriers, which can effectively avoid magnetic circuit cross-interference between the inner and outer sides, and also facilitate molding and manufacturing, such as by die stamping or machining.

[0109] Understandably, the width (radial width) of the air gap 2113a should not be too large or too small. If the width is too large, it will occupy the width of the stator core 21 yoke 211a, resulting in a reduction in the width of the first yoke 2111 and the second yoke 2112, which may affect the saturation of the motor's magnetic circuit and lead to a decrease in motor performance. If the width is too small, it may not effectively isolate the magnetic circuit and will also increase the difficulty of the lamination process, affecting the life of the lamination die punch. Based on this, the width of the air gap 2113a can be selected between 0.5mm and 1.5mm, preferably around 1mm.

[0110] Furthermore, a magnetic bridge 2114 is provided between two adjacent air gaps 2113a, connecting the first yoke 2111 and the second yoke 2112. In this embodiment, the magnetic bridge 2114 serves to connect the first yoke 2111 and the second yoke 2112 into a single structure. The width (circumferential width) of the magnetic bridge 2114 should not be too large or too small. If the width is too large, it is easy to cause magnetic leakage between the inner and outer magnetic fields. If the width is too small, the connection strength between the first yoke 2111 and the second yoke 2112 is poor, which can easily lead to their breakage. Based on this, the width of the magnetic bridge 2114 can be selected to be between 0.5 mm and 1 mm.

[0111] In one embodiment of this application, the stator core 21 can be an integral structure, which can be formed by stamping.

[0112] Please see Figures 6 to 8 In one embodiment of this application, the stator core 21 is a chain structure formed by connecting multiple core portions 21a end to end. Each core portion 21a has a yoke 211a and internal teeth 212 and external teeth 213 respectively disposed on the inner and outer sides of the yoke 211a. The multiple yoke portions 211a are rolled into a ring-shaped yoke 211.

[0113] In this embodiment, the stator core 21 has a chain structure. Compared with a solid round core, this design reduces the volume during manufacturing and facilitates winding, thus improving production efficiency. Optionally, in practical applications, the stator core 21 can be a ring structure formed by rolling the chain structure. In this case, multiple yokes 211a are connected end to end to form a ring yoke 211. Multiple internal teeth 212 are spaced apart on the inner peripheral wall of the ring yoke 211, and a second stator slot 212a is formed between two adjacent internal teeth 212. Multiple external teeth 213 are spaced apart on the outer peripheral wall of the ring yoke 211, and a first stator slot 213a is formed between two adjacent external teeth 213.

[0114] Optionally, the core section 21a is an integral structure.

[0115] Please see Figures 7 to 8 In one embodiment of this application, the external tooth 213 includes a tooth portion 2131 and an external pole shoe portion 2132. The tooth portion 2131 is connected to the yoke portion 211a, and the external pole shoe portion 2132 is inserted into and assembled with the outer side wall of the tooth portion 2131.

[0116] Understandably, the inner diameter of the inner tooth 212 is smaller than the outer diameter of the outer tooth 213. The chain structure is a straight strip structure before rolling, meaning that the gap between adjacent outer teeth 213 is smaller before rolling than the gap after rolling. To avoid possible interference between the outer teeth 213 before rolling, in this embodiment, the outer tooth 213 includes a tooth portion 2131 and an outer pole shoe portion 2132 located on the yoke portion 211a. The outer pole shoe portion 2132 is inserted into the tooth portion 2131 after the chain structure is rolled, thus assembling the outer pole shoe portion 2132. This improves the electromagnetic performance while avoiding interference between adjacent outer teeth 213.

[0117] The outer pole shoe 2132 and the tooth 2131 are assembled by a plug-in method, which simplifies the assembly operation and facilitates winding. Optionally, the outer wall of the tooth 2131 is provided with a slot, and the inner wall of the outer pole shoe 2132 is provided with a protrusion. The outer pole shoe 2132 and the tooth 2131 are installed by inserting the protrusion into the slot.

[0118] Optionally, the width of the toothed shoe of the outer pole shoe 2132 is greater than the width of the toothed shoe of the inner tooth 212. This design allows for better expansion of the magnetic field, a more uniform magnetic flux distribution in the air gap 2113a, and enables more magnetic flux to be transferred to the outer rotor through the air gap 2113a, reducing magnetic field non-uniformity and improving the overall performance and operational stability of the motor.

[0119] Optionally, the gap between two adjacent outer pole shoes 2132 can be equal to the gap between two adjacent inner pole shoes 212. This makes the magnetic flux distribution more uniform, helps to reduce the concentration of local magnetic flux, thereby reducing cogging torque and electromagnetic vibration, and improving the smoothness of motor operation; at the same time, it can also reduce electromagnetic noise.

[0120] Please see Figure 3 In one embodiment of this application, the inner diameter D2 of the inner tooth 212 and the outer diameter D1 of the outer tooth 213 satisfy: 0.35≤D1 / D2≤0.55.

[0121] Understandably, the inner diameter D2 is the diameter of the circumference of the inner surface of the inner tooth 212, and the outer diameter D1 is the diameter of the circumference of the outer surface of the outer tooth 213. By setting the ratio of the inner diameter D2 of the inner tooth 212 to the outer diameter D1 of the outer tooth 213 to satisfy 0.35≤D2 / D1≤0.55, the magnetic field distribution of the motor can be optimized, the cogging torque reduced, losses decreased, and the motor efficiency and output torque stability improved.

[0122] Optionally, the inner diameter D2 of the internal tooth 212 satisfies: 20mm≤D2≤40mm, for example, 20mm, 21mm, 23mm, 25mm, 28mm, 30mm, 32mm, 35mm, 37mm, 38mm, 39mm or 40mm can be selected.

[0123] Optionally, the outer diameter D1 of the external tooth 213 satisfies: 40mm≤D1≤70mm, for example, 40mm, 41mm, 43mm, 45mm, 48mm, 50mm, 52mm, 55mm, 57mm, 60mm, 63mm, 65mm, 67mm or 70mm can be selected.

[0124] Please see Figure 3 In one embodiment of this application, the slot width B2 of the second stator slot 212a and the tooth inner diameter D2 of the inner tooth 212 satisfy: 0.06≤B2 / D2≤0.1.

[0125] This design allows the winding coil to easily extend into the second stator slot 212a for winding, optimizing the winding process and reducing winding resistance. On the other hand, it makes the magnetic field distribution more uniform, reduces cogging torque, reduces losses, and improves motor efficiency and torque density.

[0126] Correspondingly, the slot width B1 of the first stator slot 213a and the tooth inner diameter D2 of the internal tooth 212 satisfy: 0.06≤B1 / D1≤0.1.

[0127] Please see Figures 9 to 13In one embodiment of this application, the stator assembly 2 further includes a stator frame 22. The stator frame 22 includes two frame bodies respectively installed at opposite ends of the stator core 21. The frame body includes an annular bracket 221, a plurality of first slot insulation portions 222 and a plurality of second slot insulation portions 223. The annular bracket 221 covers the annular yoke portion 211. The plurality of first slot insulation portions 222 are spaced apart on the outer peripheral surface of the annular bracket 221 and are correspondingly inserted into the first stator slot 213a. The plurality of second slot insulation portions 223 are spaced apart on the inner peripheral surface of the annular bracket 221 and are correspondingly inserted into the second stator slot 212a. The first winding 23 is wound on the first slot insulation portion 222 and the second winding 24 is wound on the second slot insulation portion 223.

[0128] In this embodiment, two frame bodies are respectively disposed at both ends of the stator core 21, serving to install and fix the stator core 21. Each frame body includes an annular bracket 221, multiple first slot insulation portions 222, and multiple second slot insulation portions 223. The annular bracket 221 connects the multiple outer first slot insulation portions 222 and the multiple inner second slot insulation portions 223. The multiple first slot insulation portions 222 are correspondingly inserted into the first stator slots 213a of the stator core 21, serving to isolate the first winding 23 from the outer teeth 213, wherein the inner cavity of the first slot insulation portion 222 allows the coil of the first winding 23 to pass through. The multiple second slot insulation portions 223 are correspondingly inserted into the second stator slots 212a of the stator core 21, serving to isolate the second winding 24 from the inner teeth 212, wherein the inner cavity of the second slot insulation portion 223 allows the coil of the second winding 24 to pass through. Therefore, the stator frame 22 of this embodiment can simultaneously achieve the insulation installation of the outer teeth 213 of the stator core 21 with the first winding 23 and the insulation installation of the inner teeth 212 with the second winding 24, thus ensuring the insulation performance between the stator core 21 and the two windings.

[0129] During installation, the first slot insulation part 222 and the second slot insulation part 223 of the two frame bodies can be inserted into the corresponding first stator slot 213a and second stator slot 212a, covering the wall surface of the first stator slot 213a and the wall surface of the second stator slot 212a. At this time, the annular brackets 221 at both ends abut against the two ends of the annular yoke 211 of the stator core 21. Then, a coil is wound on the side of the first slot insulation part 222 away from the slot wall of the first stator slot 213a to form a first winding 23, and a coil is wound on the side of the second slot insulation part 223 away from the slot wall of the second stator slot 212a to form a second winding 24, so as to realize the fixing function of the two frame bodies, the stator core 21 and the winding coil.

[0130] In practical applications, the first slot insulating portion 222 can have a regular or irregular shape. Optionally, the first slot insulating portion 222 can be a cylindrical structure, a slotted structure, a tubular structure, etc. In practical applications, the second slot insulating portion 223 can have a regular or irregular shape. Optionally, the second slot insulating portion 223 can be a cylindrical structure, a slotted structure, a tubular structure, etc.

[0131] Optionally, the annular support 221, the first groove insulation part 222 and the second groove insulation part 223 can be integrally molded structures, such as integral molding by mold, 3D printing or other molding methods.

[0132] Optionally, the two frame bodies can be a single molded structure, in which case they can be wrapped with adhesive to form a single integrated structure.

[0133] Optionally, the first slot insulation portion 222 and the second slot insulation portion 223 can be made of materials with good insulation properties, such as plastics, rubber, coated cloth or tubing, insulating impregnated fiber products, electrical films, composite products, and adhesive tapes. The ring-shaped bracket 221 serves as a fixed support and also has insulation properties, so it can be made of plastic with a certain strength.

[0134] Please see Figures 9 to 12 In one embodiment of this application, the axial end face of the annular bracket 221 is provided with a wiring groove 2211, the outer wall of the wiring groove 2211 is provided with a first wire passage 2212, and the inner wall of the wiring groove 2211 is provided with a second wire passage 2213. The first wire passage 2212 connects the wiring groove 2211 with the inner cavity of the first groove insulation part 222, and the second wire passage 2213 connects the wiring groove 2211 with the inner cavity of the second groove insulation part 223.

[0135] This design allows the conductor of the first winding 23, located on the radially outer side, to pass through the first wire through-hole 2212 into the wiring groove 2211 for routing; and allows the conductor of the second winding 24, located on the radially inner side, to pass through the second wire through-hole 2213 into the wiring groove 2211 for routing. This facilitates winding two independent sets of windings, simplifies the winding operation, and improves the neatness of the wiring, avoiding clutter.

[0136] As an example, when winding the outer teeth 213 of the stator core 21, the wire can be first introduced from the outside into the wire routing groove 2211, passed through the first first wire passage 2212 to wind the first outer tooth 213, and after winding, it passes through the adjacent first wire passage 2212 into the wire routing groove 2211, and then runs along the path of the wire routing groove 2211 to the next outer tooth 213 to be wound, and then passes through the first wire passage 2212 at that location into the inner cavity of the corresponding first slot insulation part 222 to wind the next outer tooth 213. This process is repeated to realize the winding function of the first winding 23 inside the stator component. After the winding is completed, the lead wire of the first winding 23 is led out through the wire routing groove 2211.

[0137] Similarly, when winding the inner teeth 212 of the stator core 21, the wire can be first introduced from the outside into the wire routing groove 2211, passed through the first second wire passage 2213 to wind the first inner tooth 212, and after winding, it can be passed from the adjacent second wire passage 2213 into the wire routing groove 2211, and then the wire can be routed along the path of the wire routing groove 2211 to the next inner tooth 212 to be wound, and then passed from the second wire passage 2213 at that location into the inner cavity of the corresponding second slot insulation part 223 to wind the next inner tooth 212. This process is repeated to realize the winding function of the second winding 24 on the outside of the stator component. After the winding is completed, the lead wire of the second winding 24 is led out through the wire routing groove 2211.

[0138] In practical applications, the relative positions of the first wire guide 2212 and the second wire guide 2213 can be determined according to the actual situation, for example, they can be set relative to each other or staggered. In this embodiment, considering the difficulty of the molding process, the first wire guide 2212 and the second wire guide 2213 are set relative to each other, which can simplify the design of the molding mold on the one hand, and make the stability of the skeleton body higher on the other hand.

[0139] Optionally, the wiring groove 2211 is an annular groove surrounding the center of the annular bracket 221, which makes the wiring path of the winding coil smoother and avoids scratching the enameled wire at the corners.

[0140] Please see Figures 9 to 11 In one embodiment of this application, a first winding portion 224 is provided between two adjacent first groove insulating portions 222. One end of the first winding portion 224 is connected to the outer peripheral wall of the annular bracket 221, and the other end extends radially outward toward the annular bracket 221. A first insulating cover 226 for covering the end of the external tooth 213 is provided at the end of the first winding portion 224 away from the annular bracket 221.

[0141] In this embodiment, the first slot insulation portion 222 is configured as an opening for the coil to enter, facing radially outward from the annular support 221. This opening can be adapted to the gap between two adjacent external teeth 213 in the stator core 21. The opposite side walls of the first slot insulation portion 222 respectively mate with the side wall surfaces of two adjacent external teeth 213. The first winding 23 passes through the through slots of the two adjacent first slot insulation portions 222 and winds onto the first winding portion 224, so that the distribution of the first winding 23 is more uniform, further improving the performance stability of the stator components. It can be understood that the first winding portion 224 between two adjacent first slot insulation portions 222 and the first insulating cover 226 disposed at the end of the first winding portion 224 facing away from the annular support 221 can wrap the end face of the external teeth 213, achieving a better insulation effect for the coil and the external teeth 213.

[0142] Optionally, the first insulating cover 226 may be in the shape of a dovetail structure to match the shape of the toothed end face of the outer tooth 213.

[0143] Please see Figures 9 to 11 In one embodiment of this application, a second winding portion 225 is provided between two adjacent second slot insulating portions 223. One end of the second winding portion 225 is connected to the inner peripheral wall of the annular bracket 221, and the other end extends toward the center of the annular bracket 221. A second insulating cover 227 for covering the end of the inner tooth 212 is provided at the end of the second winding portion 225 away from the annular bracket 221.

[0144] In this embodiment, the side of the second slot insulation portion 223 facing the center of the annular support 221 is configured as an opening for the coil to enter. This opening can be adapted to the gap between two adjacent internal teeth 212 in the stator core 21. The opposite side walls of the second slot insulation portion 223 respectively mate with the side wall surfaces of two adjacent internal teeth 212. The second winding 24 passes through the through slots of the two adjacent second slot insulation portions 223 and winds onto the second winding portion 225, so that the distribution of the second winding 24 is more uniform, further improving the performance stability of the stator components. It can be understood that the second winding portion 225 between two adjacent second slot insulation portions 223 and the second insulating cover 227 provided at the end of the second winding portion 225 facing away from the annular support 221 can wrap the end face of the internal teeth 212, achieving a better insulation effect for the coil and the internal teeth 212.

[0145] Optionally, the second insulating cover 227 may be in the shape of a dovetail structure to match the shape of the toothed end face of the inner tooth 212.

[0146] In practical applications, the specific structural form of the skeleton body can be determined according to the actual situation.

[0147] In one embodiment, the annular support 221 is configured to be spliced ​​together by multiple sub-modules along the circumference, and each sub-module has a first groove insulation part 222 and a second groove insulation part 223 respectively on the outer and inner sides in the radial direction.

[0148] In this embodiment, the skeleton body is configured as a modular structure, assembled from multiple modular structures. Specifically, the annular support 221 includes multiple sub-modules. Each sub-module has a first slot insulation part 222 and a second slot insulation part 223 on its outer and inner sides, respectively. When assembled with the stator core 21, each sub-module and its first slot insulation part 222 and second slot insulation part 223 can be inserted into the first stator slot 213a and the second stator slot 212a, respectively. When all insertions are completed, the multiple sub-modules will be assembled circumferentially into an annular structure that matches the annular yoke 211 of the stator core 21. Alternatively, the multiple sub-modules can be assembled into an annular structure firstly, where the multiple first slot insulation parts 222 correspond to the multiple first stator slots 213a of the stator core 21, and the multiple second slot insulation parts 223 correspond to the multiple second stator slots 212a of the stator core 21. Then, the assembled whole is assembled onto the stator core 21.

[0149] In one embodiment, the frame body is a one-piece molded structure. In this embodiment, the annular bracket 221, the plurality of first slot insulation parts 222, and the plurality of second slot insulation parts 223 are integrally molded into a complete circular structure. During assembly, it is only necessary to insert this complete circular structure into the stator core 21.

[0150] In one embodiment, the stator frame 22 is an integrally formed structure. In this embodiment, the two frame bodies are integrally formed structures. As can be seen from the previous embodiment, the two frame bodies are respectively installed at both ends of the axial direction of the stator core 21. Therefore, it can be understood that the two frame bodies are directly formed together with the stator core 21. Optionally, the stator frame 22 is wrapped around the stator core 21 by injection molding.

[0151] To achieve the above objectives, this application also provides a driving device, such as... Figures 14 to 17The drive device includes a base 1, a stator assembly 2, a first rotor 3, and a second rotor 4. The specific structure of the stator assembly 2 is as described in the above embodiments. Since this drive device 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. The base 1 includes an end face flange 11 and an annular bracket 12 disposed at one axial end of the end face flange 11. The annular bracket 12 is provided with a first receiving groove 101 and a second receiving groove 102 distributed axially at intervals. The stator assembly 2 is sleeved on the outer periphery of the annular bracket 12 at the part corresponding to the second receiving groove 102. The first rotor 3 is disposed on the periphery of the stator assembly 2 and is opposite to the external teeth 213. The first rotor 3 is supported by a first support shaft 51 installed in the first receiving groove 101. The second rotor 4 is installed in the second receiving groove 102 and is opposite to the internal teeth 212.

[0152] In this embodiment, the base 1 is used to support and install the stator assembly 2, the first rotor 3, and the second rotor 4. An annular bracket 12 is located at one axial end of the end face flange 11. The annular bracket 12 and the end face flange 11 serve to separate the first rotor 3 side and the second rotor 4 side. The annular bracket 12 has a first receiving groove 101 and a second receiving groove 102 separated axially. The second rotor 4 is installed in the second receiving groove 102, and the first rotor 3 is installed in the first receiving groove 101 via a first support shaft 51. This allows the first rotor 3 and the second rotor 4 to be reliably and independently installed on the base 1, improving stability during operation. It is understood that the internal teeth 212 of the stator assembly 2 are opposite to the second rotor 4, and the first rotor 3 is opposite to the external teeth 213 of the stator assembly 2. By energizing the first winding 23 and the second winding 24, the first rotor 3 and the second rotor 4 can operate independently of each other.

[0153] With this design, the two independent magnetic fields generated on the inner and outer radial sides of the stator assembly 2 can drive the corresponding second rotor 4 and first rotor 3 to operate respectively, realizing that one drive device has two output functions. Therefore, when applied to electrical equipment, one drive device can drive two different working structures to operate respectively without the need to set up two separate motors, thereby reducing the overall size and installation space.

[0154] Please see Figures 14 to 21 In one embodiment of this application, the stator assembly 2 has a first side close to the end face flange 11 and a second side away from the end face flange 11 in the axial direction, and the first receiving groove 101 protrudes axially from the second side of the stator assembly 2.

[0155] Understandably, the second rotor 4 is installed in the second receiving groove 102, the stator assembly 2 is sleeved on the annular bracket 12 corresponding to the outer periphery of the second receiving groove 102, and the first rotor 3 is sleeved on the periphery of the stator assembly 2. Thus, the first rotor 3 and the second rotor 4 are radially aligned. By axially protruding the first receiving groove 101 on the side of the stator assembly 2 away from the end face flange 11, the first receiving groove 101 and the stator assembly 2 are axially offset, and will not occupy the space on the radial inner side of the stator assembly 2. Therefore, the radial dimension of the stator assembly 2 can be reduced, and the overall radial dimension of the drive device can be reduced.

[0156] Optionally, the first support shaft 51 can be fixedly connected to the first rotor 3, in which case the first support shaft 51 is rotatably installed in the first receiving groove 101; or, the first support shaft 51 can be rotatably connected to the first rotor 3, in which case the first support shaft 51 is fixedly installed in the first receiving groove 101.

[0157] Please see Figures 14 to 21 In one embodiment of this application, the first rotor 3 includes a rotor housing 31 and a first magnetic ring 32. The rotor housing 31 is sleeved on the periphery of the stator assembly 2 to form a first output end. The first magnetic ring 32 is disposed on the inner circumferential surface of the rotor housing 31 and is disposed opposite to the stator assembly 2. The first support shaft 51 is fixed to the rotor housing 31 and is rotatably engaged with the first receiving groove 101 through the first bearing 52.

[0158] In this embodiment, a first magnetic loop is formed between the first magnetic ring 32 and the stator assembly 2 through an air gap 2113a. During operation, the magnetic field in the first magnetic loop drives the first magnetic ring 32 to rotate, which in turn drives the rotor housing 31 to rotate. The rotor housing 31 forms the first output end for performing work. The first receiving groove 101 is a bearing chamber in which a first bearing 52 is installed. One end of the first support shaft 51 is fixedly installed with the inner ring of the first bearing 52, and the other end is fixedly connected with the rotor housing 31, thereby realizing the function of supporting and installing the first rotor 3 and ensuring the smooth rotation of the first rotor 3.

[0159] During assembly, the first magnetic ring 32 can be fixed to the inner circumferential surface of the rotor housing 31 by means of adhesive or fastener connection. One end of the first support shaft 51 is connected to the inner ring of the first bearing 52, and the other end of the first support shaft 51 can be connected and fixed to the rotor housing 31 by means of fastener connection or interference fit. Optionally, the first support shaft 51 is a metal shaft, and the first bearing 52 is a rolling bearing. The first bearing 52 can be fastened in the first receiving groove 101 by adhesive to restrict the axial movement of the first rotor 3.

[0160] Please see Figures 14 to 21In one embodiment of this application, a second support shaft 58 is fixedly installed on the side of the annular bracket 12 facing the second receiving groove 102. The second rotor 4 includes a bushing 41, a second rotating shaft 42, and a second magnetic ring 43, which are sequentially sleeved on the second support shaft 58 from the inside to the outside. The second magnetic ring 43 is located in the receiving groove and is disposed opposite to the stator assembly 2. The second rotating shaft 42 extends out of the second receiving groove 102 to form a second output end.

[0161] In this embodiment, the second support shaft 58 serves to support the second rotor 4, thereby improving the reliability of the second rotor 4's movement. The second support shaft 58 remains fixed relative to the base 1. The bushing 41 is rotatably fitted around the second support shaft 58. The second rotating shaft 42 is fixed around the bushing 41, and the second magnetic ring 43 is fixed around the second rotating shaft 42. The second magnetic ring 43 and the stator assembly 2 form a second magnetic circuit through an air gap 2113a. During operation, the magnetic field in the second magnetic circuit drives the second magnetic ring 43 to rotate, which in turn drives the second rotating shaft 42 to rotate. The second rotating shaft 42 forms a second output end to perform work.

[0162] Optionally, the bushing 41 can be made of graphite, which has good wear resistance and corrosion resistance, and can reduce the friction between the bushing 41 and the second support shaft 58.

[0163] To achieve the above objectives, this application also provides a fan and water pump assembly; please refer to [link to relevant documentation]. Figures 14 to 23 The fan-pump assembly includes a drive unit, a wind turbine 61, and a water turbine 71. The specific structure of the drive unit is as described in the above embodiments. Since this fan-pump assembly 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, which will not be described in detail here. Among them, the wind turbine 61 is drivenly connected to the first rotor 3; the water turbine 71 is drivenly connected to the second rotor 4.

[0164] This design integrates the fan and water pump into a single unit, sharing the same drive mechanism, thus reducing size, installation space, and assembly efficiency. The first rotor 3 and the second rotor 4 can rotate independently, ensuring that the operation of the wind turbine 61 and the water turbine 71 is independent and undisturbed. This means that the wind turbine 61 can operate alone, the water turbine 71 can operate alone, or both can operate simultaneously. It should be noted that when the wind turbine 61 and water turbine 71 operate simultaneously, they can rotate synchronously or asynchronously, and their speeds can be the same or different. Their rotation is independent and undisturbed; the operation of the wind turbine 61 does not affect the operation of the water turbine 71, and vice versa, thus meeting different airflow and water flow requirements.

[0165] Optionally, the impeller 61 can be a centrifugal impeller 61, a centrifugal fan, etc. The water impeller 71 can be an impeller.

[0166] When this fan and pump assembly is used in a water heater, the fan 61 and pump assembly are connected to both the flue system and the water system. The fan 61 drives the airflow along the flue system, and the water impeller 71 drives the water flow along the water system. For example, the water heater includes a burner, a combustion chamber housing, a heat exchanger, and a fume hood arranged in sequence. The heat exchanger is connected to an inlet pipe and an outlet pipe. The flue gas flow channel between the burner and the fume hood constitutes the flue system, and the inlet pipe is connected to the outlet pipe via the heat exchanger to constitute the water system. The fan 61 can be connected to either the inlet or outlet of the flue system; the water impeller 71 can be connected in series with either the inlet or outlet pipe. For example, when this fan and pump assembly is applied to a forced-draft gas water heater, the air outlet of the impeller 61 can be connected to the burner (i.e., the impeller 61 is connected to the inlet end of the flue system). In this case, the impeller 61 can function as a forced-draft fan, driving the high-temperature flue gas generated by the burner through the combustion chamber to the heat exchanger for heat exchange, and driving the flue gas after heat exchange to be collected by the fume hood and discharged outside the water heater. On the other hand, the impeller 61 can also be used to deliver air into the burner to supplement the secondary air required for combustion. As another example, when this fan and pump assembly is applied to a forced-extraction gas water heater, the air inlet of the impeller 61 can be connected to the fume hood (i.e., the impeller 61 is connected to the outlet end of the flue system). In this case, the impeller 61 can function as a forced-extraction fan, drawing the high-temperature flue gas generated by the burner towards the fume hood, and finally discharging it outside the water heater through the air outlet of the impeller 61. The water turbine 71 can be connected in series in the water system to increase water pressure and flow, thus functioning as a water pump. Therefore, the fan-pump assembly of this embodiment integrates the fan and pump into one unit and can be driven by the same drive device. Compared with related technologies that install separate fan and pump structures in the water heater, this saves material costs and reduces size. On the one hand, it reduces installation space, allowing more space inside the water heater for installing other expansion modules while maintaining the same water heater size. On the other hand, it reduces installation steps and improves assembly efficiency. Furthermore, the aforementioned fan-pump assembly can cool the stator assembly 2 and the second rotor 4 when cold water is pumped through them, which helps reduce the temperature rise of the stator assembly 2 and the second rotor 4, extending their service life.

[0167] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20 In one embodiment of this application, the water turbine 71 and the wind turbine 61 are respectively located on opposite axial sides of the end face flange 11.

[0168] Understandably, the end flange 11 serves to separate the air chamber A and the water chamber B. Its two sides are used to install the shells of air chamber A and water chamber B, respectively. The impeller 61 and water impeller 71 are located on opposite axial sides of the end flange 11. The impeller 61 is driven to the first rotor 3, and the water impeller 71 is driven to the second rotor 4. The second rotor 4 and the first rotor 3 are respectively located on the radial inner and outer sides of the stator assembly 2. By setting the impeller 61 and water impeller 71 on opposite axial sides of the end flange 11, the air chamber A and water chamber B are respectively located on opposite axial sides of the end flange 11. This improves the overall dynamic balance of the fan and pump assembly when the impeller 61 and water impeller 71 rotate, and also enhances the independence of the airflow and water flow, preventing water from entering the air chamber A and contacting the stator assembly 2, thus preventing short-circuit faults.

[0169] Specifically, the annular support 12 is provided with a partition 13, which divides the inner cavity of the annular support 12 into a second receiving groove 102 and a first receiving groove 101. The first receiving groove 101 is located on the side of the second receiving groove 102 away from the end face flange 11. The stator assembly 2 is sleeved on the outer periphery of the annular support 12 corresponding to the second receiving groove 102. The impeller 61 is connected to the part of the first rotor 3 that is axially away from the end face flange 11. The water impeller 71 is connected to the part of the second rotor 4 that is axially away from the first receiving groove 101 and extends out of the second receiving groove 102.

[0170] Understandably, the annular support 12 extends axially outward from the side of the end flange 11 near the air cavity A. The outer circumferential surface of the annular support 12 is used for the stator assembly 2 to be fitted and installed. The inner cavity of the annular support 12 forms a first receiving groove 101 for the first support shaft 51 to be installed and a second receiving groove 102 for the second rotor 4 to be installed. The partition 13 serves to isolate the first receiving groove 101 and the second receiving groove 102, preventing water from entering the air cavity A side and contacting the stator assembly 2 to cause a short circuit.

[0171] To further improve rotational stability, optionally, at least two rolling bearings arranged axially are provided in the first receiving groove 101. A first retaining ring 54 is provided between two adjacent rolling bearings, a second retaining ring 55 is provided on the outer end face of the outermost rolling bearing, and a wave spring 56 is provided between the innermost rolling bearing and the bottom wall of the first receiving groove 101. The first support shaft 51 is simultaneously inserted into the inner rings of multiple rolling bearings. In this way, multiple rolling bearings can provide stable support for the first support shaft 51, thereby ensuring the rotational stability of the first rotor 3. The wave spring 56 can reduce motor noise and vibration. Optionally, the inner wall of the first receiving groove 101 is provided with a first slot for receiving the outer edge of the first retaining ring 54. The outer circumferential surface of the first support shaft 51 is provided with a second slot for receiving the inner edge of the second retaining ring 55. This can further improve the installation reliability of the rolling bearings and prevent axial movement of the bearings.

[0172] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20 In one embodiment of this application, the first rotor 3 includes a rotor housing 31 and a first magnetic ring 32. The rotor housing 31 is sleeved on the periphery of the stator assembly 2, and the first magnetic ring 32 is disposed on the inner circumferential surface of the rotor housing 31 and is disposed opposite to the stator assembly 2. The impeller 61 is fixedly connected to the rotor housing 31, and the first support shaft 51 is fixed to the rotor housing 31 and / or the impeller 61.

[0173] In this embodiment, a first magnetic loop is formed between the first magnetic ring 32 and the stator assembly 2 through an air gap 2113a. During operation, the magnetic field in the first magnetic loop drives the first magnetic ring 32 to rotate, which in turn drives the rotor housing 31 and the first support shaft 51 to rotate. The impeller 61 is connected and fixed to the rotor housing 31 of the first rotor 3. The rotation of the rotor housing 31 drives the impeller 61 to rotate. During assembly, the first magnetic ring 32 can be fixed to the inner circumferential surface of the rotor housing 31 by means of adhesive or fastener connection. One end of the first support shaft 51 is connected to the first bearing 52 in the first receiving groove 101, and the other end of the first support shaft 51 can be connected and fixed to the rotor housing 31 by means of fastener connection or interference fit. The first bearing 52 can provide stable support for the first rotor 3 to ensure the stability of the rotation of the first rotor 3.

[0174] In practical applications, the impeller 61 and rotor housing 31 can be integrally formed. This simplifies the installation structure of the impeller 61 and ensures the reliability of the connection between the impeller 61 and rotor housing 31, thereby ensuring the stability of the impeller 61's operation. Of course, in other embodiments, the separate structures can also be assembled and fixed into one piece.

[0175] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20In one embodiment, the rotor housing 31 includes a first cylindrical portion 311, a second cylindrical portion 312, and a third cylindrical portion 313 connected sequentially in a stepped manner along the axial direction. A first stepped surface is formed between the first cylindrical portion 311 and the second cylindrical portion 312, and a second stepped surface is formed between the second cylindrical portion 312 and the third cylindrical portion 313. The first cylindrical portion 311 is correspondingly sleeved on the periphery of the stator assembly 2, and a first magnetic ring 32 is disposed on the inner circumferential surface of the first cylindrical portion 311. The second cylindrical portion 312 is correspondingly sleeved on the periphery of the first receiving groove 101, and the third cylindrical portion 313 is located on the side of the first receiving groove 101 that is axially opposite to the second receiving groove 102. One end of the impeller 61 is sleeved on the outside of the second cylindrical portion 312 and the third cylindrical portion 313, and abuts against and limits the first stepped surface and the second stepped surface. The end of the first support shaft 51 that is opposite to the rolling bearing passes through the third cylindrical portion 313 and is fixed to the impeller 61 by a locking member 53.

[0176] In this embodiment, the rotor housing 31 is configured to include a first cylindrical portion 311, a second cylindrical portion 312, and a third cylindrical portion 313 connected in a stepped manner. The first cylindrical portion 311 is sleeved around the stator assembly 2, and a first magnetic ring 32 is installed on its inner circumferential surface, so that the first magnetic ring 32 can be opposite to the stator assembly 2 to form a magnetic circuit, thereby driving the rotor housing 31 and the impeller 61 to rotate. The second cylindrical portion 312 is correspondingly sleeved around the first receiving groove 101, connecting the first cylindrical portion 311 and the third cylindrical portion 313, and playing a role in strengthening the connection, thereby improving the overall structural strength of the rotor housing 31. The third cylindrical portion 313 is located on the side of the first receiving groove 101 away from the second receiving groove 102, and is used for the first support shaft 51 to pass through and be installed, thereby playing a role in connecting and fixing with the first support shaft 51. Understandably, the diameters of the first cylindrical section 311, the second cylindrical section 312, and the third cylindrical section 313 decrease sequentially, forming a first stepped surface between the first cylindrical section 311 and the second cylindrical section 312, and a second stepped surface between the second cylindrical section 312 and the third cylindrical section 313. When assembled with the impeller 61, the first and second stepped surfaces can act as a restraining and limiting surface for the impeller 61, improving the installation reliability of the impeller 61 and the rotor housing 31, and further enhancing rotational reliability. Furthermore, the sequentially decreasing diameters of the first cylindrical section 311, the second cylindrical section 312, and the third cylindrical section 313 reduce the space occupied by the rotor housing 31 inside the impeller 61. The third cylindrical section 313, located closest to the air inlet side of the impeller 61, has the smallest diameter, resulting in less obstruction of the airflow into the impeller 61. This reduces wind resistance, increases airflow, and improves the efficiency of the impeller 61.

[0177] The end of the first support shaft 51 facing away from the rolling bearing passes through the third cylindrical section 313 and is fixed to the impeller 61 by a locking member 53. Optionally, the locking member 53 is a nut. The end of the first support shaft 51 facing away from the rolling bearing has an external thread, and the nut and the external thread cooperate to achieve a fixed assembly between the first support shaft 51 and the rotor housing 31. Optionally, a washer is provided between the nut and the rotor housing 31. Optionally, a third retaining ring 57 is provided on the side of the rotor housing 31 facing away from the nut. Correspondingly, the first support shaft 51 has a third groove for accommodating the third retaining ring 57, which can further improve the connection reliability between the rotor housing 31 and the first support shaft 51.

[0178] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20 In one embodiment of this application, the outer diameter of the stator assembly 2 is greater than the outer diameter of the second cylindrical portion 312, and the outer diameter of the stator assembly 2 is smaller than the outer diameter of the impeller 61.

[0179] This design ensures, on the one hand, that there is a sufficiently strong magnetic force between the outer teeth 213 of the stator assembly 2 and the first magnetic ring 32 on the inner wall of the first cylinder 311, so that the rotor housing 31 can be reliably driven to rotate by the stator assembly 2, thereby improving operational stability; on the other hand, it allows the impeller 61 to have a sufficiently large outer diameter, reducing wind resistance and increasing wind power.

[0180] In one embodiment of this application, the outer diameter of the first rotor 3 is smaller than the outer diameter of the wind turbine 61. It is understood that the outer diameter of the first cylindrical portion 311 is smaller than the outer diameter of the wind turbine 61. This design allows the wind turbine 61 to have a sufficiently large outer diameter, reducing wind resistance and increasing wind power.

[0181] In one embodiment of this application, the portion of the rotor housing 31 used for mounting the impeller 61 is defined as the mounting portion (not shown in the figure). The outer periphery of the mounting portion gradually expands in a trumpet shape from the end furthest from the end face flange 11 to the portion near the stator assembly 2. This design allows the trumpet-shaped mounting portion to guide the airflow on the A side of the air chamber, further reducing wind resistance and increasing air volume.

[0182] In one embodiment of this application, the fan-pump assembly further includes a volute 62 disposed at one end of the base 1. The volute 62 and the base 1 enclose a wind cavity A, which has an air inlet and an air outlet. The impeller 61, the stator assembly 2, and the first rotor 3 are all located within the wind cavity A. With this design, when the first rotor 3 drives the impeller 61 to rotate, a negative pressure can be generated at the air inlet, drawing external airflow into the fan cavity and then discharging it through the air outlet to achieve the fan function.

[0183] In practical applications, the volute 62, stator assembly 2, and base 1 can be installed according to the actual situation:

[0184] Optionally, such as Figure 14 , Figure 15 as well as Figure 17 The volute 62 and stator assembly 2 are packaged into a single structure. In this configuration, the volute 62 and stator assembly 2 can be molded together using a Bulk Molding Compound (BMC) mold, and then installed to the base 1 by means of bonding or screwing. This simplifies the assembly steps of the volute 62 and stator assembly 2 and improves assembly efficiency.

[0185] Optionally, the volute 62, stator assembly 2, and base 1 are packaged into a single structure. In this configuration, the base 1 and stator assembly 2 can be molded into the volute 62 using a Bulk Molding Compound (BMC) mold while simultaneously being encapsulated as a single unit. This simplifies the assembly process of the volute 62, stator assembly 2, and base 1, improving assembly efficiency.

[0186] Optionally, such as Figure 18 and Figure 19 The stator assembly 2 and the base 1 are encapsulated into a single structure. In this method, the base 1 and stator assembly 2 can be molded into a single structure in a BMC (Bulk Molding Compound) mold, and then installed to the volute 62 by bonding or screwing. Alternatively, they can be integrally molded using potting compound, as shown in the figure, where the sealing component 25 connects the stator assembly 2 and the base 1 into a single structure. This simplifies the assembly steps of the stator assembly 2 and the base 1, improving assembly efficiency.

[0187] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20 In one embodiment of this application, a second support shaft 58 is fixedly installed on the side of the partition 13 facing the second receiving groove 102, and the second rotor 4 and / or water wheel 71 are slidably engaged with the outer periphery of the second support shaft 58.

[0188] In this embodiment, by installing a second support shaft 58 within the second receiving groove 102, the second support shaft 58 can support the second rotor 4 and the water wheel 71, improving the installation reliability and operational stability of the second rotor 4 and the water wheel 71. It is understood that when the water wheel 71 rotates, it may carry water into the second receiving groove 102. Optionally, the second support shaft 58 can be made of ceramic, which has good wear resistance and corrosion resistance. Furthermore, the water entering the second receiving groove 102 will also lubricate the second support shaft 58, ensuring the rotational stability of the second rotor 4.

[0189] In one embodiment of this application, the fan pump assembly further includes a pump housing 72, which is sealed and connected to the end face flange 11 to form a pump chamber for accommodating the water turbine 71. The pump housing 72 is provided with an inlet and an outlet that communicate with the pump chamber.

[0190] In this embodiment, a pump chamber for accommodating the water turbine 71 is formed by a sealed connection between the end flange 11 and the pump casing 72. The pump chamber is connected to the second receiving groove 102. This allows the second rotor 4, installed in the second receiving groove 102, to be easily connected to the water turbine 71. This structural design also facilitates the design of the second rotor 4 and the water turbine 71 as an integrated structure. When the second rotor 4 rotates, it drives the water turbine 71 to rotate, allowing external liquid to be drawn into the pump chamber through the inlet and discharged through the outlet, thus realizing the pump function.

[0191] In one embodiment, the partition 13 is provided with a first mounting hole 103, and the pump housing 72 is provided with a second mounting hole 721 opposite to the first mounting hole 103. The two ends of the second support shaft 58 are respectively inserted into the second mounting hole 721 and the first mounting hole 103. This design allows both ends of the second support shaft 58 to be supported and fixed. Compared with the cantilever method, this embodiment can improve the support strength of the second support shaft 58 and improve the installation stability of the second rotor 4.

[0192] Optionally, the second support shaft 58 is interference-fitted with the first mounting hole 103; alternatively, the second support shaft 58 is interference-fitted with the second mounting hole 721.

[0193] Furthermore, two washers 59 are fitted onto the second support shaft 58, and the second rotor 4 is fitted onto the outer circumference of the second support shaft 58. The two washers 59 are located on opposite sides of the second rotor 4. This design reduces the frictional force caused by the axial movement of the second rotor 4. During assembly, one washer 59 can be installed on the second support shaft 58 first, then the second rotor 4 can be fitted onto the second support shaft 58, followed by the installation of the second washer 59. Finally, the pump casing 72 is covered to achieve pump-side installation.

[0194] Optionally, considering the aquatic environment, the gasket 59 in this embodiment can be a ceramic gasket 59, which has good wear resistance and corrosion resistance.

[0195] Please see Figure 14 , Figure 15 , Figure 18 as well as Figure 20 In one embodiment of this application, the second rotor 4 includes a bushing 41, a second rotating shaft 42, and a second magnetic ring 43, which are sequentially sleeved on the second support shaft 58 from the inside out. The second magnetic ring 43 is located in the second receiving groove 102 and is disposed opposite to the stator assembly 2. The second rotating shaft 42 extends out of the second receiving groove 102 and is connected to the water wheel 71.

[0196] In this embodiment, the second support shaft 58 is fixed relative to the base 1 and the pump casing 72. The bushing 41 is rotatably fitted around the second support shaft 58. The second rotating shaft 42 is fixed around the bushing 41. The second magnetic ring 43 is fixed around the second rotating shaft 42. The second magnetic ring 43 and the stator assembly 2 form a second magnetic circuit through an air gap 2113a. During operation, the magnetic field in the second magnetic circuit drives the second magnetic ring 43 to rotate, which in turn drives the second rotating shaft 42 to rotate. The second rotating shaft 42 then drives the water turbine 71 to rotate, thereby realizing the water pump function.

[0197] Optionally, the bushing 41 can be made of graphite, which has good wear resistance and corrosion resistance, and can reduce the friction between the bushing 41 and the second support shaft 58.

[0198] Please see Figure 23 In one embodiment, the second rotating shaft 42 and the water wheel 71 are integrally formed. For example, the second rotating shaft 42 and the water wheel 71 can be integrally formed by injection molding, which simplifies the installation structure of the water wheel 71 and ensures the reliability of the connection between the water wheel 71 and the second rotating shaft 42, thereby ensuring the stability of the operation of the water wheel 71. Of course, in other embodiments, the water wheel 71 and the second rotating shaft 42 can also be assembled and fixed by means of snap-fit ​​connection, threaded connection, etc. It is worth noting that when the water wheel 71 is composed of multiple parts, the second rotating shaft 42 can be integrally formed with one part of the water wheel 71. For example, the water wheel 71 may include a first disc body and a second bypass body arranged opposite and spaced apart, and blades disposed between the first disc body and the second disc body, wherein the second rotating shaft 42 can be integrally formed with the first disc body.

[0199] To ensure the overall stability of the second rotor 4, the bushing 41, the second shaft 42, and the second magnetic ring 43 can optionally be injection molded into a single unit. It is understood that when the materials of the bushing 41, the second shaft 42, and the second magnetic ring 43 are different, they can be injection molded together as a single unit using insert injection molding.

[0200] To achieve the above objectives, this application also proposes a water heater comprising a flue system, a water system, and a fan-pump assembly. The specific structure of the fan-pump assembly is as described in the above embodiments. Since this water heater adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The fan-pump assembly is connected to both the flue system and the water system. The impeller 61 drives the airflow along the flue system, and the water impeller 71 drives the water flow along the water system.

[0201] Taking a gas water heater as an example, the water heater includes a burner, a combustion chamber housing, a heat exchanger, and a fume hood arranged sequentially. The heat exchanger is connected to an inlet pipe and an outlet pipe. The flue gas flow channel between the burner and the fume hood constitutes a flue gas system, and the inlet pipe is connected to the outlet pipe via the heat exchanger to form a water outlet system. The impeller 61 can be connected to either the inlet or outlet end of the flue gas system; the water impeller 71 can be connected in series with either the inlet or outlet pipe. For example, when this fan and pump assembly is applied to a forced-draft gas water heater, the air outlet of the impeller 61 can be connected to the burner (i.e., the impeller 61 is connected to the inlet end of the flue system). In this case, the impeller 61 can function as a forced-draft fan, driving the high-temperature flue gas generated by the burner through the combustion chamber to the heat exchanger for heat exchange, and driving the flue gas after heat exchange to be collected by the fume hood and discharged outside the water heater. On the other hand, the impeller 61 can also be used to deliver air into the burner to supplement the secondary air required for combustion. As another example, when this fan and pump assembly is applied to a forced-extraction gas water heater, the air inlet of the impeller 61 can be connected to the fume hood (i.e., the impeller 61 is connected to the outlet end of the flue system). In this case, the impeller 61 can function as a forced-extraction fan, drawing the high-temperature flue gas generated by the burner towards the fume hood, and finally discharging it outside the water heater through the air outlet of the impeller 61. The water turbine 71 can be connected in series in a water system to increase water pressure and flow, thus functioning as a water pump.

[0202] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stator assembly characterized by, The stator core comprises a ring-shaped yoke, a plurality of inner teeth arranged at the inner periphery of the ring-shaped yoke, and a plurality of outer teeth arranged at the outer periphery of the ring-shaped yoke, a first stator slot is formed between two adjacent outer teeth, a second stator slot is formed between two adjacent inner teeth, and the slot opening width of the first stator slot is equal to the slot opening width of the second stator slot; a first winding corresponding to the outer teeth; and a second winding corresponding to the inner teeth, and the first winding and the second winding are configured to be independently controllable. The ring-shaped yoke comprises:

2. The stator assembly of claim 1, wherein, a first yoke, a plurality of outer teeth are arranged around the outer periphery of the first yoke; a second yoke arranged at the inner periphery of the first yoke, a plurality of inner teeth are arranged around the outer periphery of the second yoke; and a magnetic barrier structure arranged between the first yoke and the second yoke. The magnetic barrier structure is a plurality of air gaps formed between the first yoke and the second yoke, and the plurality of air gaps are distributed along the circumferential direction of the ring-shaped yoke; 3. The stator assembly of claim 2, wherein, two adjacent air gaps have a magnetic separation bridge connecting the first yoke and the second yoke. The stator core is a chain structure formed by connecting a plurality of core parts end to end, the core part has a yoke and the inner teeth and the outer teeth arranged on both sides of the yoke, and a plurality of yokes are rolled to form the ring-shaped yoke.

4. The stator assembly of claim 1, wherein, The outer teeth comprise a tooth part and an outer pole shoe part, the tooth part is connected with the yoke, and the outer pole shoe part is inserted and assembled with the outer side wall of the tooth part.

5. The stator assembly of claim 4, wherein, The inner diameter D2 of the inner tooth and the outer diameter D1 of the outer tooth satisfy: 0.35≤D2 / D1≤0.55; 6. A stator assembly as claimed in any one of claims 1 to 5, wherein, and / or, the inner diameter D2 of the inner tooth satisfies: 20mm≤D2≤40mm; and / or, the outer diameter D1 of the outer tooth satisfies: 40mm≤D1≤70mm; and / or, the slot opening width B2 of the second stator slot and the inner diameter D2 of the inner tooth satisfy: 0.06≤B2 / D2≤0.

1. The stator assembly further comprises a stator skeleton, the stator skeleton comprises two skeleton bodies respectively mounted at opposite ends of the stator core, and the skeleton body comprises:

7. A stator assembly as claimed in any one of claims 1 to 5, wherein, a ring-shaped support covering the ring-shaped yoke; a plurality of first slot insulation parts distributed on the outer periphery of the ring-shaped support and inserted into the first stator slot; and a plurality of second slot insulation parts distributed on the inner periphery of the ring-shaped support and inserted into the second stator slot; the first winding is arranged on the first slot insulation part, and the second winding is arranged on the second slot insulation part. An axially extending end surface of the ring-shaped support is provided with a wiring slot, an outer side slot wall of the wiring slot is provided with a first wire passing port, and an inner side slot wall of the wiring slot is provided with a second wire passing port, the first wire passing port communicates the inner cavity of the first slot insulation part with the wiring slot, and the second wire passing port communicates the inner cavity of the second slot insulation part with the wiring slot.

8. The stator assembly of claim 7, wherein, The first wire passing port and the second wire passing port are oppositely arranged.

9. The stator assembly of claim 8, wherein, ​ 10. The stator assembly of claim 7, wherein, A first winding part is arranged between two adjacent first slot insulation parts, one end of the first winding part is connected with the outer peripheral wall of the annular support, and the other end extends radially outwardly towards the annular support; one end of the first winding part away from the annular support is provided with a first insulation cover for covering the outer tooth end part; And / or, a second winding part is arranged between two adjacent second slot insulation parts, one end of the second winding part is connected with the inner peripheral wall of the annular support, and the other end extends towards the center of the annular support; one end of the second winding part away from the annular support is provided with a second insulation cover for covering the inner tooth end part.

11. The stator assembly of claim 7, wherein, The annular support is arranged to be arranged in a circumferential direction by a plurality of sub-modules, and each of the sub-modules is correspondingly provided with the first slot insulation part and the second slot insulation part on the outer side and the inner side in the radial direction, respectively. Alternatively, the stator framework is an integral structure.

12. A drive apparatus characterized by comprising: Comprising: a base including an end face flange and an annular support arranged at one end of the end face flange in the axial direction, the annular support being provided with first accommodating grooves and second accommodating grooves arranged in the axial direction at intervals; The stator assembly according to any one of claims 1 to 11 is sleeved on the outer periphery of the annular support corresponding to the part of the second accommodating groove; a first rotor arranged at the periphery of the stator assembly and opposite to the outer teeth, the first rotor being supported by a first support shaft arranged in the first accommodating groove; and a second rotor arranged in the second accommodating groove and opposite to the inner teeth.

13. The drive apparatus according to claim 12, wherein In the axial direction of the end face flange, the stator assembly has a first side close to the end face flange and a second side away from the end face flange, and the first accommodating groove protrudes axially from the second side of the stator assembly.

14. A fan pump assembly, characterized by, Comprising: The driving device according to claim 12 or 13; a wind wheel drivingly connected with the first rotor; and a water wheel drivingly connected with the second rotor. The water wheel and the wind wheel are respectively arranged on the opposite sides of the end face flange in the axial direction.

15. The fan pump assembly of claim 14, wherein, The first rotor comprises:

16. The fan pump assembly of claim 15, wherein, a rotor shell sleeved on the periphery of the stator assembly and fixedly connected with the wind wheel; one end of the first support shaft is arranged in the first accommodating groove, and the other end is fixedly connected with the rotor shell and / or the wind wheel; and a first magnetic ring arranged on the inner peripheral surface of the rotor shell and arranged opposite to the outer teeth. The rotor shell comprises a first cylinder portion, a second cylinder portion and a third cylinder portion connected in sequence in the axial direction, the first cylinder portion is correspondingly sleeved on the periphery of the stator assembly, the first magnetic ring is arranged on the inner peripheral surface of the first cylinder portion, the second cylinder portion is correspondingly sleeved on the periphery of the first accommodating groove, and the third cylinder portion is located on the side of the first accommodating groove axially away from the second accommodating groove; 17. The fan pump assembly of claim 16, wherein, The wind wheel is arranged outside the second cylinder portion and the third cylinder portion; The first support shaft is arranged in the third cylinder portion and fixedly connected with the wind wheel by a locking member. The outer diameter of the stator assembly is greater than the outer diameter of the second cylinder portion, and the outer diameter of the stator assembly is smaller than the outer diameter of the wind wheel.

18. The fan pump assembly of claim 17, wherein, The outer diameter of the first rotor is smaller than the outer diameter of the wind wheel.

19. The fan pump assembly of claim 16, wherein, ​ 20. The fan pump assembly of claim 16, wherein, The part of the rotor shell for mounting the wind wheel is defined as a mounting part, and the outer periphery of the mounting part is arranged in a trumpet shape gradually expanding from one end away from the end face flange to the side close to the stator assembly.

21. The fan pump assembly of any one of claims 16 to 20, wherein, The rotor shell and the wind wheel are integrated structures. Alternatively, the first rotor and the wind wheel are fixed as an integrated structure.

22. The fan pump assembly of any one of claims 14 to 20, wherein, A volute shell is further included, which forms a wind cavity together with the base, and the wind wheel, the stator assembly, and the first rotor are all located in the wind cavity. The volute shell and the stator assembly are encapsulated as an integrated structure, or the volute shell, the stator assembly, and the base are encapsulated as an integrated structure, or the stator assembly and the base are encapsulated as an integrated structure.

23. The fan pump assembly of any one of claims 14 to 20, wherein, A second support shaft is fixedly installed in the second accommodating groove, and the second rotor and / or the water wheel is / are slidingly fitted on the outer periphery of the second support shaft. The second rotor includes, from inside to outside, a shaft sleeve, a second rotating shaft, and a second magnetic ring, which are successively sleeved on the outer periphery of the second support shaft, the second magnetic ring is located in the second accommodating groove and is arranged opposite to the stator assembly, and the second rotating shaft extends from the second accommodating groove and is connected with the water wheel.

24. The fan pump assembly of claim 23, wherein, A pump shell is further included, which is sealingly connected with the end face flange to form a pump cavity for accommodating the water wheel. A partition plate is arranged in the annular support to separate the first accommodating groove from the second accommodating groove, the partition plate is provided with a first mounting hole, the pump shell is provided with a second mounting hole opposite to the first mounting hole, and the two ends of the second support shaft are respectively inserted into the first mounting hole and the second mounting hole.

25. The fan pump assembly of claim 23, wherein, The second rotating shaft and the water wheel are an integrated structure. Alternatively, the second rotor and the water wheel are injection molded as an integrated structure.

26. A water heater, comprising: It includes: a flue system; a waterway system for heat exchange with the flue system; and a fan water pump assembly as claimed in any one of claims 14 to 25, which is connected with the flue system and the waterway system, the wind wheel is used to drive airflow to flow along the flue system, and the water wheel is used to drive water flow to flow along the waterway system.

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