Fan water pump assembly and water heater

Abstract

The utility model discloses a fan water pump assembly and a water heater, and relates to the technical field of water heaters. Wherein the fan water pump assembly comprises a base, a stator assembly, a first rotor, a second rotor, a wind wheel and a water wheel, the stator assembly is arranged on the base, the stator assembly is provided with a first winding and a second winding which can be independently controlled, and at least one of the first winding and the second winding is a single-phase winding; the first rotor corresponds to the first winding, and the second rotor corresponds to the second winding; one of the wind wheel and the water wheel is in driving connection with the first rotor, and the other is in driving connection with the second rotor. According to the technical scheme, the fan and the water pump can be integrated and share the same driving device, the size is reduced, the installation space is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a fan and water pump assembly and a water heater. Background Technology

[0002] In related technologies, when electrical equipment has multiple conveying systems, each conveying system is typically equipped with an independent drive motor as a power source to achieve the conveying function. Taking a water heater as an example, it contains both a flue system and a water circuit system. The flue system uses a fan to drive the air flow within it, while the water circuit system uses a water pump to drive the water flow within it. Each fan and water pump is equipped with a drive motor, and each drive motor requires a corresponding electrical control system, thus increasing the cost of the water heater. Furthermore, the two drive motors occupy a significant amount of installation space inside the water heater, resulting in a large size and requiring two separate installations, leading to low assembly efficiency. Utility Model Content

[0003] The main purpose of this utility model is to propose a fan and water pump assembly that integrates the fan and water pump into one unit, sharing the same drive device, reducing volume, minimizing installation space, and improving assembly efficiency.

[0004] To achieve the above objectives, the present invention provides a fan and water pump assembly comprising:

[0005] Base;

[0006] A stator assembly is disposed on the base, the stator assembly having a first winding and a second winding that can be controlled independently of each other, at least one of the first winding and the second winding being a single-phase winding;

[0007] A first rotor and a second rotor, wherein the first rotor is configured corresponding to the first winding, and the second rotor is configured corresponding to the second winding; and

[0008] A wind turbine and a water turbine, one of which is driven and connected to the first rotor, and the other is driven and connected to the second rotor.

[0009] In one embodiment of this application, the stator assembly further includes a stator core, the stator core having a plurality of internal teeth and a plurality of external teeth respectively disposed on its radial inner and outer sides, the first winding being wound on the plurality of external teeth, and the second winding being wound on the plurality of internal teeth.

[0010] The first rotor is located on the periphery of the stator assembly and is opposite to the external teeth, while the second rotor is located on the radially inner side of the stator assembly and is opposite to the internal teeth.

[0011] In one embodiment of this application, the number of internal teeth and the number of external teeth are both multiples of 2.

[0012] In one embodiment of this application, both the first winding and the second winding are single-phase windings.

[0013] In one embodiment of this application, the number of one of the internal teeth and the external teeth is a multiple of 2, and the number of the other is a multiple of 3.

[0014] In one embodiment of this application, one of the first winding and the second winding is a single-phase winding, and the other is a three-phase winding.

[0015] In one embodiment of this application, the fan and water pump assembly further includes:

[0016] A volute, connected to and enclosing one side of the base to form a wind cavity, wherein the first rotor and the impeller are disposed within the wind cavity; and

[0017] The pump casing is connected to and encloses the side of the base away from the volute to form a water cavity, and the second rotor and the water wheel are disposed in the water cavity.

[0018] In one embodiment of this application, the base includes:

[0019] An end face flange, wherein the wind turbine and the water turbine are respectively located on opposite axial sides of the end face flange; and

[0020] An annular support is provided at one end of the end face flange near the wind turbine. The annular support has a first receiving groove and a second receiving groove that are spaced apart along the axial direction. The first receiving groove communicates with the air cavity, and the second receiving groove communicates with the water cavity.

[0021] The stator assembly is located on the outer periphery of the annular bracket corresponding to the second receiving groove. The first rotor is supported by a first support shaft installed in the first receiving groove, and the second rotor is installed in the second receiving groove.

[0022] 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.

[0023] In one embodiment of this application, the first rotor includes:

[0024] The rotor housing includes a first cylindrical section, a second cylindrical section, and a third cylindrical section connected sequentially in a stepped manner along the axial direction. The first cylindrical section is correspondingly sleeved around the stator assembly, the second cylindrical section is correspondingly sleeved around the first receiving groove, and the third cylindrical section is located on the side of the first receiving groove that is axially opposite to the second receiving groove. The impeller is mounted outside the second and third cylindrical sections. The first support shaft passes through the third cylindrical section and is fixed to the impeller by a locking member.

[0025] The first magnetic ring is disposed on the inner circumferential surface of the first cylindrical portion.

[0026] 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.

[0027] And / or, the outer diameter of the first rotor is smaller than the outer diameter of the wind turbine.

[0028] In one embodiment of this application, the impeller is disposed on the side of the stator assembly away from the end face flange. The part of the first rotor used to install the impeller is defined as the mounting part. The outer periphery of the mounting part is gradually widened in a trumpet shape from the end away from the end face flange to the side close to the stator assembly.

[0029] 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;

[0030] 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.

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

[0032] Flue system;

[0033] A water system for heat exchange with the flue system; and

[0034] 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.

[0035] The fan and pump assembly of this application integrates the fan and pump into one unit and can be driven by the same drive device, resulting in a higher degree of integration. 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 the installation of other expansion modules while maintaining the same water heater size. On the other hand, during water heater assembly, the fan and pump assembly only needs to be installed onto the water heater body once, which simplifies the installation process and improves assembly efficiency compared to the traditional method of installing the fan and pump separately. Furthermore, in the aforementioned fan and pump assembly, at least one of the first and second windings of the stator assembly is a single-phase winding. Compared with a dual-rotor three-phase motor, the structure is simpler, smaller, and lighter, further improving the integration of the fan and pump assembly and saving installation space. Attached Figure Description

[0036] 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.

[0037] Figure 1 This is a schematic diagram of the external structure of an embodiment of the fan and water pump assembly of this application;

[0038] Figure 2 and Figure 3 This is a full sectional view of the structure of an embodiment of the fan and water pump assembly of this application;

[0039] Figure 4 This is a full sectional view of another embodiment of the fan and water pump assembly of this application;

[0040] Figure 5 This is a schematic diagram of the dynamic engagement between the stator assembly and the first and second rotors in this application;

[0041] Figure 6 This is a schematic diagram of the structure of the stator core with 4 internal and 4 external teeth in an embodiment of this application;

[0042] Figure 7 for Figure 6 An exploded view of the stator core, the first winding, and the second winding in the embodiment;

[0043] Figure 8 for Figure 6A schematic diagram illustrating the engagement of the stator core with the first and second rotors in this embodiment;

[0044] Figure 9 This is a schematic diagram of the structure of the stator core in this embodiment of the application when there are 4 internal teeth and 6 external teeth;

[0045] Figure 10 This is a schematic diagram of the structure of the stator core in this embodiment of the application when there are 6 internal teeth and 4 external teeth.

[0046] Explanation of icon numbers:

[0047]

[0048]

[0049] 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

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," 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 indicated technical features. Therefore, features defined with "first" or "second" 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.

[0054] This utility model proposes a fan and water pump assembly that integrates the fan and water pump into one unit, sharing a single drive device, thus reducing size, installation space, and assembly efficiency. When applied to water heaters, it can reduce water heater costs, decrease water heater size, and improve assembly efficiency. The structure of the fan and water pump assembly will be described below with reference to embodiments.

[0055] In the embodiments of this utility model, such as Figures 1 to 4 as well as Figure 6 and Figure 9 As shown, the fan-pump assembly includes a base 1, a stator assembly 2, a first rotor 3, a second rotor 4, a wind turbine 61, and a water turbine 71. The stator assembly 2 is mounted on the base 1 and has a first winding 23 and a second winding 24 that can be controlled independently. At least one of the first winding 23 and the second winding 24 is a single-phase winding. The first rotor 3 is configured corresponding to the first winding 23, and the second rotor 4 is configured corresponding to the second winding 24. One of the wind turbine 61 and the water turbine 71 is driven and connected to the first rotor 3, and the other is driven and connected to the second rotor 4.

[0056] The base 1 supports and mounts the stator assembly 2, the first rotor 3, and the second rotor 4. The stator assembly 2 has a first winding 23 and a second winding 24 that can be independently controlled. The first winding 23 cooperates with the first rotor 3 to drive the first rotor 3 to rotate, and the second winding 24 cooperates with the second rotor 4 to drive the second rotor 4 to rotate. One of the wind turbine 61 and the water turbine 71 is driven and connected to the first rotor 3, and the other is driven and connected to the second rotor 4. Thus, the wind turbine 61 and the water turbine 71 can be driven to rotate independently, realizing the functions of a fan and a water pump to meet different air volume and water volume requirements. Specifically, the wind turbine 61 can operate alone, the water turbine 71 can operate alone, or the wind turbine 61 and the water turbine 71 can operate simultaneously. When the wind turbine 61 and the water turbine 71 operate simultaneously, they can rotate synchronously or asynchronously, and their speeds can be the same or different. They rotate independently without interference. Optionally, the wind turbine 61 can be a centrifugal wind turbine 61 or a cross-flow wind turbine 61, etc.; the water turbine 71 can be a flow channel impeller, a spiral centrifugal impeller, or a swirl impeller, etc.

[0057] The specific structure of the stator assembly 2 can be determined according to the actual situation. For example, it can be two independent stator structures that cooperate with the first rotor 3 and the second rotor 4 respectively, or it can be a stator core 21 equipped with two independent first windings 23 and second windings 24 that cooperate with the first rotor 3 and the second rotor 4 respectively, etc., as long as it can drive the two rotors to rotate independently and achieve independent torque output. Understandably, the arrangement of the first winding 23 and the second winding 24 can be determined according to the actual situation. For example, they can be distributed radially along the stator assembly 2, with one winding surrounding the radial periphery of the other, which can reduce the overall axial dimension of the stator assembly 2 and the fan and pump assembly. In this case, the first rotor 3 and the second rotor 4 can be located on the radial sides of the stator assembly 2 respectively; or they can be distributed axially along the stator assembly 2, in which case the first rotor 3 and the second rotor 4 can be located on the axial sides of the stator assembly 2 respectively.

[0058] At least one of the first winding 23 and the second winding 24 of the stator assembly 2 is a single-phase winding. This can be understood as either only the first winding 23 being a single-phase winding, or only the second winding 24 being a single-phase winding, or both the first winding 23 and the second winding 24 being single-phase windings. Compared with the dual-rotor three-phase motors of related technologies, the stator assembly 2 and the cooperation structure of the two rotors in this embodiment are more suitable for driving light starting loads such as airflow and water flow. The structure is simple, the size is small and the weight is light, and it is easier to control and install.

[0059] 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 a water system to increase water pressure and flow, thus functioning as a water pump.

[0060] Therefore, the fan and pump assembly of this embodiment integrates the fan and pump into one unit and can be driven by the same drive device, resulting in higher integration. 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 keeping the water heater size unchanged. On the other hand, when assembling the water heater, the fan and pump assembly only needs to be installed onto the water heater body at once. Compared with the traditional water heater assembly scheme that requires separate installation of the fan and pump onto the water heater body, this scheme simplifies the installation steps and improves assembly efficiency. In addition, in the above-mentioned fan and pump assembly, at least one of the first winding 23 and the second winding 24 of the stator assembly 2 is a single-phase winding. Compared with a dual-rotor three-phase motor, the structure is simpler, smaller, and lighter, which can further improve the integration of the fan and pump assembly and save installation space.

[0061] Please see Figures 2 to 5In one embodiment of this application, the stator assembly 2 further includes a stator core 21. The stator core 21 has a plurality of internal teeth 212 and a plurality of external teeth 213 respectively disposed on its radial inner and outer sides. A first winding 23 is wound on the plurality of external teeth 213, and a second winding 24 is wound on the plurality of internal teeth 212. A first rotor 3 is disposed on the periphery of the stator assembly 2 opposite to the external teeth 213, and a second rotor 4 is disposed on the radial inner side of the stator assembly 2 opposite to the internal teeth 212.

[0062] Specifically, the stator core 21 includes an annular stator yoke 211, with multiple internal teeth 212 disposed on the inner circumference of the stator yoke 211. A second stator slot 212a is formed between each pair of adjacent internal teeth 212. Multiple external teeth 213 are disposed on the outer circumference of the stator yoke 211, with a first stator slot 213a formed between each pair of adjacent external teeth 213. A first winding 23 is wound around the multiple external teeth 213 through the first stator slot 213a, and a second winding 24 is wound around the multiple internal teeth 212a through the second stator slot 212a. When current is passed through the first winding 23 and the second winding 24 respectively, two independent magnetic fields can be generated on the radial outer and inner sides of the stator core 21, which can drive the corresponding second rotor 4 and first rotor 3 to run 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 run respectively without the need to set up two separate motors, thereby reducing the overall size and installation space.

[0063] The stator core 21 can be an integral structure formed by stamping; or the stator core 21 can be a chain structure formed by connecting multiple core sections end to end.

[0064] Understandably, single-phase windings typically consist of two sets of windings (main winding and auxiliary winding), while three-phase windings typically consist of three sets of windings. Different types of windings have different winding methods, and the corresponding number of stator teeth on the stator core 21 also differs.

[0065] In one embodiment, please refer to Figures 6 to 8 The number of internal teeth 212 and the number of external teeth 213 are both multiples of 2.

[0066] This design allows the stator core 21 to be used for single-phase windings both radially inner and radially outer. For example, both the first winding 23 and the second winding 24 can be single-phase windings. In this case, the number of internal teeth 212 can be 2, 4, 6, 8, etc., and the number of external teeth 213 can also be 2, 4, 6, 8, etc. The number of internal teeth 212 can be the same as or different from the number of external teeth 213. When the number of internal teeth 212 is the same as the number of external teeth 213, the internal teeth 212 and external teeth 213 are opposite or misaligned. Of course, in this embodiment, the number of internal teeth 212 or external teeth 213 may also be a multiple of 3, such as 6, 12, etc., in which case both single-phase and three-phase windings can be used.

[0067] In one embodiment, please refer to Figure 9 and Figure 10 The number of one of the internal teeth 212 and the external teeth 213 is a multiple of 2, and the number of the other is a multiple of 3.

[0068] In this design, one of the first winding 23 and the second winding 24 is a single-phase winding, and the other is a three-phase winding. For example, when the number of internal teeth 212 is a multiple of 2 and the number of external teeth 213 is a multiple of 3, the first winding 23 is a three-phase winding and the second winding 24 is a single-phase winding. In this case, the number of internal teeth 212 can be 2, 4, 6, 8, etc., and the number of external teeth 213 can be 3, 6, 9, etc. Alternatively, when the number of internal teeth 212 is a multiple of 3 and the number of external teeth 213 is a multiple of 2, the second winding 24 is a three-phase winding and the first winding 23 is a single-phase winding. In this case, the number of internal teeth 212 can be 3, 6, 9, etc., and the number of external teeth 213 can be 2, 4, 6, 8, etc. It should be noted that in the drive module of this embodiment, one side is equivalent to a single-phase motor, which can be used for low-load and low-power scenarios, while the other side is equivalent to a three-phase motor, which can be used for high-load and high-power scenarios. In this way, it can adapt to more application scenarios and meet more different power needs.

[0069] Please see Figures 1 to 4 In one embodiment of this application, the fan pump assembly further includes a volute 62 and a pump housing 72. The volute 62 is connected to one side of the base 1 and encloses it to form a wind cavity A. The first rotor 3 and the impeller 61 are disposed in the wind cavity A. The pump housing 72 is connected to the side of the base 1 away from the volute 62 and encloses it to form a water cavity B. The second rotor 4 and the impeller 71 are disposed in the water cavity B.

[0070] A wind cavity A is formed between the volute 62 and the base 1, and a water cavity B is formed between the pump casing 72 and the base 1. The base 1 is located between the wind cavity A and the water cavity B, which can separate the wind cavity A and the water cavity B, play the role of dry and wet separation, and prevent water from flowing into the wind cavity A and contacting the stator assembly 2, causing a short circuit fault.

[0071] Understandably, the air chamber A is enclosed by the volute 62 and the base 1. When the volute 62 and base 1 are assembled, one end face of the base 1 can cover the opening of the volute 62, thus eliminating the need for the end face of the volute 62. This helps save materials, reduce costs, and decrease the volume of the fan-pump assembly. The water chamber B is formed by the pump housing 72 and the base 1. When the pump housing 72 and base 1 are assembled, the other end face of the base 1 can act as a cover plate for the pump housing 72, thus eliminating the need for the pump housing 72 cover plate. This also helps save materials, reduce costs, and decrease the volume of the fan-pump assembly. Optionally, a sealing structure is provided at the connection between the pump housing 72 and the base 1 to ensure the sealing performance of the water chamber B.

[0072] Furthermore, the stator assembly 2 is mounted on the base 1, allowing the first rotor 3 and the second rotor 4 to be positioned near the center within the fan-pump assembly housing. This facilitates the connection between the first rotor 3 and the impeller 61, and between the second rotor 4 and the water impeller 71, shortening the transmission distance, improving rotational stability, and resulting in a more compact structural layout and reduced overall size. Optionally, the stator assembly 2 is mounted on the side of the base 1 closest to the air chamber A.

[0073] In practical applications, the volute 62, stator assembly 2, and base 1 can be installed according to the actual situation:

[0074] Optionally, please refer to Figure 2 and Figure 3 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.

[0075] Optionally, please refer to Figure 2 and Figure 3 The volute 62, stator assembly 2, and base 1 are packaged into a single structure. In this method, the base 1 and stator assembly 2 can be placed in a BMC (Bulk Molding Compound) mold to form the volute 62 while simultaneously sealing it into a single structure. This simplifies the assembly steps of the volute 62, stator assembly 2, and base 1, improving assembly efficiency.

[0076] Optionally, please refer to Figure 4The 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, with the encapsulated component connecting 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.

[0077] Please see Figures 2 to 4 In one embodiment of this application, the base 1 includes an end flange 11 and an annular bracket 12. The impeller 61 and the water impeller 71 are respectively disposed on opposite axial sides of the end flange 11. The annular bracket 12 is disposed at one end of the end flange 11 near the impeller 61. The annular bracket 12 is provided with a first receiving groove 101 and a second receiving groove 102 distributed axially. The first receiving groove 101 communicates with the wind chamber A, and the second receiving groove 102 communicates with the water chamber B. The stator assembly 2 is disposed on the outer periphery of the annular bracket 12 corresponding to the second receiving groove 102. The first rotor 3 is supported by a first support shaft 51 installed in the first receiving groove 101, and the second rotor 4 is installed in the second receiving groove 102.

[0078] The end flange 11 serves to separate the air chamber A and the water chamber B. The impeller 61 and the water impeller 71 are located on opposite axial sides of the end flange 11. The annular bracket 12 is located at one axial end of the end flange 11. It can be understood that the annular bracket 12 extends axially outward from the side of the end flange 11 closest to the air chamber A. The annular bracket 12 has a partition 13 inside, which divides the inner cavity of the annular bracket 12 into a second receiving groove 102 and a first receiving groove 101. The outer circumferential surface of the annular bracket 12 is used for the stator assembly 2 to be fitted and installed. 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 through the 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 the stability during operation. The second rotor 4 and the stator assembly 2 are located on the radial inner and outer sides of the annular bracket 12, respectively. That is, the second rotor 4 and the stator assembly 2 are separated by the annular bracket 12, preventing water from entering the stator assembly 2 side and ensuring dry-wet separation. By fitting the stator assembly 2 onto the outer periphery of the corresponding second receiving groove 102 on the annular bracket 12, the stator assembly 2 is positioned opposite the second rotor 4 within the second receiving groove 102, allowing for smooth rotation of the second rotor 4. This enables the independent operation of the impeller 61 and the water flow.

[0079] Further, please refer to Figures 2 to 4In the axial direction of the end face flange 11, 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, and the first receiving groove 101 protrudes axially from the second side of the stator assembly 2.

[0080] 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.

[0081] 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.

[0082] To further improve rotational stability, please refer to Figures 2 to 4 Optionally, the first receiving groove 101 is provided with at least two rolling bearings 52 arranged axially. A first retaining ring 54 is provided between two adjacent rolling bearings 52. A second retaining ring 55 is provided on the outer end face of the outermost rolling bearing 52. A wave spring 56 is provided between the innermost rolling bearing 52 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 52. In this way, the multiple rolling bearings 52 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 52 and prevent the bearings 52 from axially moving. Optionally, the first support shaft 51 is a metal shaft, which is interference-fitted with the inner ring of the rolling bearing 52.

[0083] Please see Figures 2 to 4 In one embodiment of this application, one end of the first support shaft 51 is installed in the first receiving groove 101, and the other end extends axially out of the first receiving groove 101 and is fixed to the first rotor 3 and / or the impeller 61; at least part of the first rotor 3 axially protrudes from the first receiving groove 101, and the impeller 61 is connected to the part of the first rotor 3 that axially protrudes from the stator assembly 2.

[0084] This design allows the impeller 61 and stator assembly 2 to be axially offset, reducing the radial dimension of the air cavity AA and the overall radial dimension of the fan and pump assembly. Furthermore, when the impeller 61 rotates, the stator assembly 2 does not obstruct airflow, effectively reducing wind resistance and increasing air volume.

[0085] Please see Figures 2 to 4 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.

[0086] In this embodiment, a first magnetic loop is formed between the first magnetic ring 32 and the stator assembly 2 through an air gap. 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.

[0087] 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.

[0088] Please see Figures 2 to 4In 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 52 passes through the third cylindrical portion 313 and is fixed to the impeller 61 by a locking member 53.

[0089] 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.

[0090] The end of the first support shaft 51 facing away from the rolling bearing 52 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 52 is provided with an external thread. The first support shaft 51 and the rotor housing 31 are fixedly assembled by the nut engaging with the external thread. 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 is provided with a third groove for accommodating the third retaining ring 57. This can further improve the connection reliability between the rotor housing 31 and the first support shaft 51.

[0091] Please see Figures 2 to 4 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] Please see Figures 2 to 4 In one embodiment of this application, a second support shaft 58 is fixedly installed in the second receiving groove 102, and the second rotor 4 and / or water wheel 71 are slidably fitted on the outer periphery of the second support shaft 58.

[0096] 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.

[0097] Optionally, 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. Both ends of the second support shaft 58 are respectively inserted into the second mounting hole 721 and the first mounting hole 103. This design ensures that both ends of the second support shaft 58 are supported and fixed. Compared to a cantilever design, this embodiment can improve the support strength of the second support shaft 58 and enhance the installation stability of the second rotor 4. 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.

[0098] 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.

[0099] 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.

[0100] Please see ​ 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.

[0101] 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, 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. 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.

[0102] 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.

[0103] 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. This 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 water wheel 71's operation. 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.

[0104] 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.

[0105] This utility model also proposes a water heater, which includes 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 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. The water system is used for heat exchange with the flue system. The fan-pump assembly is connected to both the flue system and the water system. The impeller 61 is used to drive airflow along the flue system, and the water impeller 71 is used to drive water flow along the water system.

[0106] Taking a gas water heater as an example, the water heater includes a burner, a combustion chamber housing, a heat exchanger, and a flue 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 flue hood constitutes a flue system, and the inlet pipe connects 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 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.

[0107] 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 fan and water pump assembly, characterized in that, include: Base; A stator assembly is disposed on the base, the stator assembly having a first winding and a second winding that can be controlled independently of each other, at least one of the first winding and the second winding being a single-phase winding; A first rotor and a second rotor, wherein the first rotor is configured to correspond to the first winding and the second rotor is configured to correspond to the second winding; as well as A wind turbine and a water turbine, one of which is driven and connected to the first rotor, and the other is driven and connected to the second rotor.

2. The fan and water pump assembly as described in claim 1, characterized in that, The stator assembly further includes a stator core, which has a plurality of internal teeth and a plurality of external teeth respectively disposed on its radial inner and outer sides. The first winding is wound on the plurality of external teeth, and the second winding is wound on the plurality of internal teeth. The first rotor is located on the periphery of the stator assembly and is opposite to the external teeth, while the second rotor is located on the radially inner side of the stator assembly and is opposite to the internal teeth.

3. The fan and water pump assembly as described in claim 2, characterized in that, The number of internal teeth and the number of external teeth are both multiples of 2.

4. The fan and water pump assembly as described in claim 3, characterized in that, Both the first winding and the second winding are single-phase windings.

5. The fan and water pump assembly as described in claim 2, characterized in that, The number of one of the internal teeth and the external teeth is a multiple of 2, and the number of the other is a multiple of 3.

6. The fan and water pump assembly as described in claim 5, characterized in that, One of the first winding and the second winding is a single-phase winding, and the other is a three-phase winding.

7. The fan and pump assembly as described in any one of claims 2 to 6, characterized in that, The fan and water pump assembly also includes: A volute, connected to and enclosing one side of the base to form a wind cavity, wherein the first rotor and the impeller are disposed within the wind cavity; and The pump casing is connected to and encloses the side of the base away from the volute to form a water cavity, and the second rotor and the water wheel are disposed in the water cavity.

8. The fan and water pump assembly as described in claim 7, characterized in that, The base includes: An end face flange, wherein the wind turbine and the water turbine are respectively located on opposite axial sides of the end face flange; and An annular support is provided at one end of the end face flange near the wind turbine. The annular support has a first receiving groove and a second receiving groove that are spaced apart along the axial direction. The first receiving groove communicates with the air cavity, and the second receiving groove communicates with the water cavity. The stator assembly is located on the outer periphery of the annular bracket corresponding to the second receiving groove. The first rotor is supported by a first support shaft installed in the first receiving groove, and the second rotor is installed in the second receiving groove.

9. The fan and water pump assembly as described in claim 8, characterized in that, 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 receiving groove protrudes axially from the second side of the stator assembly.

10. The fan and water pump assembly as described in claim 9, characterized in that, The first rotor includes: The rotor housing includes a first cylindrical section, a second cylindrical section, and a third cylindrical section connected sequentially in a stepped manner along the axial direction. The first cylindrical section is correspondingly sleeved around the stator assembly, the second cylindrical section is correspondingly sleeved around the first receiving groove, and the third cylindrical section is located on the side of the first receiving groove that is axially opposite to the second receiving groove. The impeller is mounted outside the second and third cylindrical sections. The first support shaft passes through the third cylindrical section and is fixed to the impeller by a locking member. The first magnetic ring is disposed on the inner circumferential surface of the first cylindrical portion.

11. The fan and pump assembly as described in claim 10, characterized in that, The outer diameter of the stator assembly is larger than the outer diameter of the second cylindrical section, and the outer diameter of the stator assembly is smaller than the outer diameter of the wind turbine. And / or, the outer diameter of the first rotor is smaller than the outer diameter of the wind turbine.

12. The fan and water pump assembly as described in claim 9, characterized in that, The impeller is located on the side of the stator assembly away from the end face flange. The part of the first rotor used to install the impeller is defined as the mounting part. The outer periphery of the mounting part gradually expands in a trumpet shape from the end away from the end face flange to the side close to the stator assembly.

13. The fan and water pump assembly as described in claim 8, characterized in that, A second support shaft is fixedly installed in the second receiving groove, and the second rotor and / or the water wheel slide in cooperation with the outer periphery of the second support shaft; 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.

14. A water heater, characterized in that, include: Flue system; A water system is used for heat exchange with the flue system; as well as The fan and water pump assembly as described in any one of claims 1 to 13, wherein the fan and water pump assembly is connected to both the flue system and the water system, the fan wheel is used to drive airflow along the flue system, and the water wheel is used to drive water flow along the water system.

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