Fan water pump assembly and water heater

Abstract

The invention discloses a draught fan water pump assembly and a water heater, and relates to the technical field of water heaters, the draught fan water pump assembly comprises a driving motor, the driving motor comprises a stator assembly and a rotor assembly capable of rotating relative to the stator assembly, and the rotor assembly is provided with a first output end and a second output end which are opposite in the axial direction; the fan assembly comprises a wind wheel which is in driving connection with the first output end; the water pump assembly comprises a pump wheel which is in driving connection with the second output end; a magnetic loop is formed between the stator assembly and the rotor assembly and used for driving the rotor assembly to rotate and driving the wind wheel and the pump wheel to rotate. According to the technical scheme, the draught fan and the water pump can be integrated into a whole and share one driving motor, and when the driving motor is applied to the water heater, the cost of the water heater can be reduced, the size of the water heater is reduced, and the assembling efficiency of the water heater is improved.

Description

Technical Field

[0001] This invention 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, some water heaters contain both a fan and a water pump. The fan and water pump need to be driven by separate motors, and each motor requires a corresponding electrical control system. This makes the water heater more expensive, and the two motors occupy a large installation space inside the water heater, resulting in a larger size and affecting the overall assembly efficiency of the water heater. Summary of the Invention

[0003] The main objective of this invention is to propose a fan and water pump assembly and a water heater, which integrates the fan and water pump into one unit with a common drive motor. When applied to a water heater, this can reduce the cost and size of the water heater and improve its assembly efficiency.

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

[0005] A drive motor includes a stator assembly and a rotor assembly rotatable relative to the stator assembly, the rotor assembly having a first output end and a second output end that are axially opposed to each other;

[0006] The wind turbine assembly includes a wind turbine that is driven and connected to the first output terminal; and

[0007] The water pump assembly includes a pump impeller that is driven to be connected to the second output terminal;

[0008] A magnetic circuit is formed between the stator assembly and the rotor assembly to drive the rotor assembly to rotate, and to drive the wind turbine and the pump wheel to rotate.

[0009] In one embodiment, the rotor assembly includes a rotor shaft, a first rotor and a second rotor connected to the rotor shaft, a first magnetic circuit is formed between the stator assembly and the first rotor, a second magnetic circuit is formed between the stator assembly and the second rotor, the first rotor has the same number of magnetic poles as the second rotor, the first rotor and the second rotor rotate to drive the rotor shaft to rotate, and the impeller and the pump impeller are respectively located at both ends of the rotor shaft.

[0010] In one embodiment, the drive motor further includes a shield, the rotor shaft passes through the shield and is rotatably connected to the shield, the stator assembly is sleeved around the shield, the first rotor is sleeved around the stator assembly, the second rotor is disposed inside the shield and sleeved around the rotor shaft, the first rotor is connected to one end of the rotor shaft, the first rotor serves as the first output end for connecting to the wind turbine, and the end of the rotor shaft away from the wind turbine serves as the second output end for connecting to the pump impeller.

[0011] In one embodiment, the rotor shaft is made of metal, the pump wheel is made of injection molded material, the pump wheel has a mounting hole, a nut is embedded in the mounting hole, and the rotor shaft is threadedly connected to the nut.

[0012] In one embodiment, the first rotor includes a rotor housing and a first magnetic ring. The rotor housing is sleeved around the stator assembly. The first magnetic ring is fixed on the inner circumferential surface of the rotor housing at a position opposite to the stator assembly. One end of the rotor shaft is connected to the rotor housing, and the impeller is fixed to the rotor housing.

[0013] In one embodiment, the shield has a first accommodating cavity at one end near the impeller and a second accommodating cavity at one end near the pump impeller. The shield has a partition separating the first accommodating cavity and the second accommodating cavity. The rotor shaft passes through the partition. The first accommodating cavity is provided with a first bearing sleeved around the rotor shaft. The second accommodating cavity is provided with a second rotor.

[0014] In one embodiment, the second rotor includes a rotor sleeve and a second magnetic ring that are sequentially fitted around the rotor shaft from the inside out. The rotor shaft, the rotor sleeve, and the second magnetic ring are formed into an integral structure by injection molding.

[0015] In one embodiment, the second accommodating cavity has an opening on the side opposite to the partition. The drive motor further includes an end cover, which is connected to the shield and covers the opening of the second accommodating cavity. The end cover has a through hole for the rotor shaft to pass through. One end of the rotor shaft that passes through the end cover is connected to the pump wheel. The partition and / or the end cover are provided with a second bearing, which is sleeved around the rotor shaft.

[0016] In one embodiment, the second bearing is a graphite bearing or a ceramic bearing;

[0017] And / or, the partition and the end cover are respectively provided with bearing chambers on their opposite sides, each bearing chamber is provided with a second bearing, and a gasket is provided between each second bearing and the second rotor.

[0018] In one embodiment, the pump assembly further includes a pump cover disposed on the side of the end cover away from the shield, the pump cover and the end cover forming a pump cavity for accommodating the pump impeller, the pump cover having an inlet and an outlet respectively communicating with the pump cavity.

[0019] In one embodiment, a first sealing member is provided between the shield and the end cap, the first sealing member being used to seal the mating parts of the shield and the end cap.

[0020] And / or, a second sealing element is provided between the end cap and the pump cover, the second sealing element being used to seal the mating parts of the end cap and the pump cover.

[0021] The present invention also proposes a water heater, comprising:

[0022] A flue system is used to circulate flue gas.

[0023] A heat exchanger, located in the flue system, is used for heat exchange with the flue gas within the flue system; and

[0024] A water system, connected to the heat exchanger; and

[0025] As described above, in the fan and pump assembly, the fan assembly is connected to the flue system and is used to drive airflow along the flue system, and the pump assembly is connected to the water system and is used to drive water flow along the water system.

[0026] The fan-pump assembly of this invention integrates the functions of both the fan and pump by sharing a single drive motor. The rotor assembly has a first output end connected to the impeller of the fan assembly and a second output end connected to the pump impeller of the pump assembly. Thus, when the drive motor rotates the rotor assembly, the first and second output ends synchronously output the same torque, thereby driving the impeller and pump impeller to rotate at the same speed. Therefore, only one drive motor and electronic control system are needed to achieve simultaneous operation of the fan and pump at the same speed. When this fan and pump assembly is applied to a water heater, only one drive motor is needed to perform both fan and pump functions, reducing the cost of the water heater. Furthermore, the higher integration of the fan and pump assembly reduces the number of drive motors, saving internal installation space and reducing the overall size of the water heater. During assembly, the fan and pump assembly can be installed onto the water heater body in one go, compared to traditional water heaters where the fan and pump need to be installed separately. This simplifies the installation process and improves assembly efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 An exploded structural diagram of an embodiment of the fan and water pump assembly provided by the present invention;

[0029] Figure 2 A cross-sectional structural schematic diagram of an embodiment of the fan and water pump assembly provided by the present invention;

[0030] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of the central province after removing the wind turbine;

[0031] Figure 4 An exploded view of an embodiment of the stator assembly provided by the present invention.

[0032] Figure 5 This is an exploded structural diagram of an embodiment of the rotor assembly provided by the present invention;

[0033] Figure 6 This is a schematic diagram of a shielding cover according to an embodiment of the present invention.

[0034] Explanation of icon numbers:

[0035] 11. Stator assembly; 111. Stator core; 112. Winding coil; 12. Rotor assembly; 12a. First output terminal; 12b. Second output terminal; 121. Rotor shaft; 122. First rotor; 1221. Rotor housing; 1222. First magnetic ring; 123. Second rotor; 1231. Rotor sleeve; 1232. Second magnetic ring; 13. Shielding cover; 131. First accommodating cavity; 132. Second accommodating cavity; 133. Partition; 134. Annular cavity; 13a. Body; 13b. Extension; 14. End cover; 15. First bearing; 16. Second bearing; 17. Gasket; 21. Impeller; 31. Pump wheel; 32. Nut; 33. Pump cover; 41. First seal; 42. Second seal.

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] Furthermore, if the embodiments of this invention 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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. When 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 invention.

[0040] In related technologies, some water heaters contain both a fan and a water pump, each requiring a separate motor for drive. For example, each fan and water pump has its own motor, and each motor requires a corresponding electrical control system. This increases the cost of the water heater, and the two motors occupy a significant amount of internal installation space, resulting in a larger water heater size and impacting the overall assembly efficiency.

[0041] This invention proposes a fan and water pump assembly that integrates the fan and water pump into one unit with a common drive motor. When applied to water heaters, this assembly can reduce the cost and size of the water heater and improve its assembly efficiency.

[0042] Please see Figures 1 to 3In one embodiment of the present invention, the fan-pump assembly includes a drive motor, a fan assembly, and a pump assembly. The drive motor includes a stator assembly 11 and a rotor assembly 12 rotatable relative to the stator assembly 11. The rotor assembly 12 has a first output end 12a and a second output end 12b that are axially opposite each other. The fan assembly includes a fan wheel 21 that is driven to be connected to the first output end 12a. The pump assembly includes a pump wheel 31 that is driven to be connected to the second output end 12b. A magnetic circuit is formed between the stator assembly 11 and the rotor assembly 12 to drive the rotor assembly 12 to rotate, thereby driving the fan wheel 21 and the pump wheel 31 to rotate.

[0043] In this embodiment, the drive motor provides power to the fan assembly and the water pump assembly. The drive motor includes a stator assembly 11 and a rotor assembly 12, which are sleeved together, forming a magnetic circuit between them through an air gap. The rotor assembly 12 may include a single rotor or two or more rotors. Optionally, the rotor assembly 12 may include at least two rotors, which can improve the motor's power density and increase the output torque. Figure 4 As shown, the stator assembly 11 may include a stator core 111 and a winding coil 112 wound on the stator core 111. The winding coil 112 is electrically connected to the electronic control system. When the winding coil is energized, it can generate a magnetic field, thereby driving the rotor assembly 12 to rotate. The stator core 111 may include a stator iron core and an insulation system covering the surface of the stator iron core. The insulation system separates the winding coil from the stator iron core to avoid scratching the winding coil or causing a short circuit. The insulation system can be implemented by spraying an insulating layer onto the surface of the stator iron core, or by assembling an insulating frame around the stator iron core. The rotor assembly 12 has a first output end 12a and a second output end 12b that are axially opposite each other. The first output end 12a is driven to the impeller 21 of the fan assembly, and the second output end 12b is driven to the pump wheel 31 of the water pump assembly. When the drive motor drives the rotor assembly 12 to rotate, the first output end 12a and the second output end 12b can output the same torque synchronously, thereby driving the impeller 21 and the pump wheel 31 to rotate at the same speed. In this way, only one drive motor and electronic control system are needed to achieve the same speed operation of the fan and the water pump, and the fan and the water pump rotate at the same speed, which reduces the control difficulty of the electronic control system.

[0044] When this fan and pump assembly is used in a water heater, the fan assembly can be connected to the water heater's flue system to drive airflow along the flue system, and the pump assembly can be connected to the water heater's water system to drive 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 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 the flue system, and the inlet pipe is connected to the outlet pipe via the heat exchanger to constitute the water system. The fan assembly can be connected to either the inlet or outlet end of the flue system; the pump assembly can be connected in series with either the inlet or outlet pipe. For example, when this fan-pump assembly is applied to a forced-draft gas water heater, the air outlet of the fan assembly can be connected to the burner (i.e., the fan assembly is connected to the inlet end of the flue system). In this case, the fan assembly driven by the drive motor can function as a forced-draft fan. On one hand, it can drive the high-temperature flue gas generated by the burner through the combustion chamber to the heat exchanger for heat exchange, and then drive the heat-exchanged flue gas to be collected by the fume hood and discharged outside the water heater. On the other hand, the fan assembly can also be used to deliver air into the burner to supplement the secondary air required for combustion. As another example, when this fan-pump assembly is applied to a forced-extraction gas water heater, the air inlet of the fan assembly can be connected to the fume hood (i.e., the fan assembly is connected to the outlet end of the flue system). In this case, the fan assembly driven by the drive motor 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 fan assembly. The water pump assembly can be connected in series in the water system. The water pump assembly driven by the drive motor can realize the function of water pressure increase and flow increase, thus realizing the water pump function.

[0045] The fan-pump assembly of this invention integrates the functions of both the fan and pump by sharing a single drive motor. The rotor assembly 12 has a first output end 12a, which is driven and connected to the impeller 21 of the fan assembly, and a second output end 12b, which is driven and connected to the pump impeller 31 of the pump assembly. Thus, when the drive motor drives the rotor assembly 12 to rotate, the first output end 12a and the second output end 12b can synchronously output the same amount of torque, thereby driving the impeller 21 and the pump impeller 31 to rotate at the same speed. Therefore, only one drive motor and electronic control system are needed to achieve the same operating speed for both the fan and the pump. When this fan and pump assembly is applied to a water heater, only one drive motor is needed to perform both fan and pump functions, which reduces the cost of the water heater. Furthermore, the fan and pump assembly has a higher degree of integration, reducing the number of drive motors and thus saving internal installation space in the water heater, which helps to reduce the size of the water heater. Moreover, when assembling the water heater, the fan and pump assembly only needs to be installed on the water heater body 13a at one time. Compared with traditional water heaters, which require the fan and pump to be installed separately on the water heater body 13a during assembly, this solution simplifies the installation steps and improves the assembly efficiency of the water heater.

[0046] Furthermore, the aforementioned fan and pump assembly allows the fan and pump to share a single drive motor. When the pump passes through cold water, it cools the drive motor, reducing temperature rise and extending its lifespan. Moreover, without changing the overall size of the water heater, this fan and pump assembly saves internal installation space by eliminating the need for a separate drive motor, freeing up more space for installing other expansion modules.

[0047] like Figure 2 As shown, in one embodiment, the rotor assembly 12 includes a rotor shaft 121, and a first rotor 122 and a second rotor 123 connected to the rotor shaft 121. A first magnetic circuit is formed between the stator assembly 11 and the first rotor 122, and a second magnetic circuit is formed between the stator assembly 11 and the second rotor 123. The number of magnetic poles of the first rotor 122 is the same as the number of magnetic poles of the second rotor 123. The first rotor 122 and the second rotor 123 rotate to drive the rotor shaft 121 to rotate. The impeller 21 and the pump impeller 31 are respectively located at both ends of the rotor shaft 121.

[0048] In this embodiment, the rotor assembly 12 includes a first rotor 122 and a second rotor 123. The arrangement of the first rotor 122, the second rotor 123, and the stator assembly 11 can be varied. For example, the first rotor 122 and the second rotor 123 can be arranged radially along the stator assembly 11, or they can be arranged axially along the stator assembly 11, etc. The stator assembly 11 and the first rotor 122 form a first magnetic circuit through an air gap. When the coil windings of the stator assembly 11 are energized, the first rotor 122 can be driven to rotate by the magnetic field of the first magnetic circuit. The stator assembly 11 and the second rotor 123 form a second magnetic circuit through an air gap. When the coil windings of the stator assembly 11 are energized, the second rotor 123 can be driven to rotate by the magnetic field of the second magnetic circuit, thereby causing the rotor shaft 121 to rotate through the first rotor 122 and the second rotor 123. Since the first rotor 122 and the second rotor 123 have the same number of magnetic poles, the pole-to-slot ratio of the first rotor 122 to the stator assembly 11 is the same as that of the second rotor 123 to the stator assembly 11. Therefore, when the drive motor is working, it can drive the first rotor 122 and the second rotor 123 to rotate at the same speed. This, in turn, causes the first rotor 122 and the second rotor 123 to simultaneously drive the rotor shaft 121 to rotate, allowing both ends of the rotor shaft 121 to output the same torque synchronously. Consequently, the impeller 21 and the pump impeller 31 can rotate at the same speed. Compared to a traditional single-stator single-rotor motor, the drive motor in this solution includes at least two rotors, the first rotor 122 and the second rotor 123, which can improve the motor's power density and increase the output torque. Furthermore, since the first rotor 122 and the second rotor 123 share a single stator assembly 11, compared to a dual-stator dual-rotor motor, one stator is eliminated, resulting in a simpler overall structure, lower cost, and smaller size.

[0049] like Figure 2 As shown, in one embodiment, the drive motor further includes a shield 13, a rotor shaft 121 passing through the shield 13 and rotatably connected to the shield 13, a stator assembly 11 sleeved around the shield 13, a first rotor 122 sleeved around the stator assembly 11, and a second rotor 123 disposed inside the shield 13 and sleeved around the rotor shaft 121. The first rotor 122 is connected to one end of the rotor shaft 121, and the first rotor 122 serves as a first output end 12a to connect to the impeller 21. The end of the rotor shaft 121 away from the impeller 21 serves as a second output end 12b to connect to the pump wheel 31.

[0050] In this embodiment, the shield 13 serves as a mounting carrier for the stator assembly 11 and the rotor assembly 12, providing stable support for them. The stator assembly 11 is fitted around the shield 13, and the stator assembly 11 and the shield 13 can be fixed by potting (e.g., potting epoxy resin material) or BMC injection molding. The first rotor 122 is an outer rotor rotatably fitted around the stator assembly 11, and the second rotor 123 is an inner rotor rotatably disposed within the shield 13. This arrangement of the first rotor 122 and the second rotor 123 along the radial direction of the stator assembly 11 results in a simple overall arrangement structure. Both the first rotor 122 and the second rotor 123 can be rotatably connected to the shield 13 via the rotor shaft 121. The first rotor 122 can serve as the first output end 12a of the rotor assembly 12 to drive the impeller 21 to rotate, and the end of the rotor shaft 121 away from the impeller 21 can serve as the second output end 12b of the rotor assembly 12 to drive the pump wheel 31 to rotate.

[0051] In one embodiment, the rotor shaft 121 is made of metal, the pump wheel 31 is made of injection molded material, the pump wheel 31 is provided with a mounting hole, a nut 32 is embedded in the mounting hole, and the rotor shaft 121 is threadedly connected to the nut 32.

[0052] In this embodiment, since the first rotor 122 and the second rotor 123 share a single rotor shaft 121, to ensure overall structural strength, the rotor shaft 121 can be made of metal to prevent deformation or breakage during rotation, thus ensuring the reliability of the fan-pump assembly. The pump wheel 31 is made of injection-molded material, which reduces its weight and facilitates the insertion of a nut 32 into the mounting hole of the pump wheel 31 via insert injection molding. The nut 32 can be made of metal. The outer circumferential surface of the end of the rotor shaft 121 connected to the pump wheel 31 has external threads. During assembly, the nut 32 on the pump wheel 31 is simply threaded onto the rotor shaft 121, simplifying the installation structure. Furthermore, this installation method allows for easy replacement of the pump wheel 31 when it is damaged, without needing to replace the rotor shaft 121 or even the entire rotor assembly 12, thus facilitating pump assembly maintenance and reducing maintenance costs.

[0053] like Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, the first rotor 122 includes a rotor housing 1221 and a first magnetic ring 1222. The rotor housing 1221 is sleeved on the periphery of the stator assembly 11. The first magnetic ring 1222 is fixed on the inner circumferential surface of the rotor housing 1221 at a position opposite to the stator assembly 11. One end of the rotor shaft 121 is connected to the rotor housing 1221, and the impeller 21 is fixed to the rotor housing 1221.

[0054] In this embodiment, a first magnetic loop is formed between the first magnetic ring 1222 and the stator assembly 11 through an air gap. When the drive motor is working, the magnetic field in the first magnetic loop drives the first magnetic ring 1222 to rotate, which in turn drives the rotor housing 1221 and the rotor shaft 121 to rotate. The impeller 21 of the fan assembly is connected and fixed to the rotor housing 1221 of the first rotor 122. The rotation of the rotor housing 1221 drives the impeller 21 to rotate. During assembly, the first magnetic ring 1222 can be fixed to the inner circumferential surface of the rotor housing 1221 by means of adhesive or fasteners. The impeller 21 and the rotor housing 1221 can be integrally formed or can be separate structures that are then assembled and fixed.

[0055] Optionally, in one embodiment, the rotor housing 1221 has an end plate and a side plate disposed around the periphery of the end plate and extending to one side. The side plate surrounds the periphery of the stator assembly 11. A first magnetic ring 1222 is fixed on the inner circumferential surface of the side plate opposite to the stator assembly 11. The end plate is disposed opposite to one end of the shield 13. The end plate has a through hole for the rotor shaft 121 to be inserted into, and the rotor shaft 121 is interference-fitted with the through hole. To ensure the structural strength of the assembly of the rotor shaft 121 and the through hole, the end plate may optionally have a flange extending axially around the periphery of the through hole. The flange surrounds the periphery of the rotor shaft 121 to increase the contact area of ​​the interference fit with the rotor shaft 121 and improve the structural strength of the rotor housing 1221.

[0056] Optionally, such as Figure 2 As shown, one end of the impeller 21 has a cavity, and the rotor housing 1221 is at least partially housed within the cavity of the impeller 21. This allows for a tighter fit between the impeller 21 and the rotor housing 1221, and also helps to reduce the axial dimension of the fan-pump assembly, thereby reducing the volume of the fan-pump assembly. Optionally, the rotor housing 1221 and the impeller 21 are assembled by stamping to form an interference fit.

[0057] In one embodiment, the impeller 21 and the rotor housing 1221 are integrally formed. For example, the impeller 21 and the rotor housing 1221 can be integrally injection molded, which simplifies the installation structure of the impeller 21 and ensures the reliability of the connection between the impeller 21 and the rotor housing 1221, thereby ensuring the stability of the impeller 21's operation. Of course, in other embodiments, the impeller 21 and the rotor housing 1221 can also be assembled and fixed by means of snap-fit ​​connection, threaded connection, etc.

[0058] In one embodiment, the fan assembly further includes a volute, and the drive motor further includes a housing. The first rotor 122, the second rotor 123, and the stator assembly 11 are housed within the housing. The volute and the housing enclose a fan cavity, and the impeller 21 is disposed within the fan cavity. The volute also has an air inlet and an air outlet respectively communicating with the fan cavity. Thus, when the first rotor 122 drives the impeller 21 to rotate, a negative pressure is generated at the air inlet to draw external airflow into the fan cavity and then discharge it through the air outlet, thereby realizing the fan function.

[0059] like Figure 3 As shown, in one embodiment, the shield 13 has a first receiving cavity 131 at one end near the impeller 21 and a second receiving cavity 132 at one end near the pump impeller 31. The shield 13 has a partition 133 that separates the first receiving cavity 131 and the second receiving cavity 132. The rotor shaft 121 passes through the partition 133. The first receiving cavity 131 is provided with a first bearing 15 sleeved around the rotor shaft 121. The second receiving cavity 132 is provided with a second rotor 123.

[0060] In this embodiment, the first bearing 15 supports the rotor shaft 121, allowing the rotor shaft 121 to be rotatably connected to the shield 13. Optionally, at least two first bearings 15 are provided along the axial direction of the rotor shaft 121, which can provide more stable support for the rotor shaft 121, thereby ensuring the smooth rotation of the rotor assembly 12. The second rotor 123 is disposed in the second accommodating cavity 132, and the second rotor 123 is separated from the stator assembly 11 by the shield 13.

[0061] Optionally, such as Figure 3 and Figure 6As shown, the shield 13 includes a body 13a and an extension 13b. The body 13a is a cylindrical shape with open ends. A partition 133 is provided inside the body 13a, dividing the inner cavity of the body 13a into a first accommodating cavity 131 and a second accommodating cavity 132. A first port is formed at the end of the first accommodating cavity 131 facing away from the partition 133, and a second port is formed at the end of the second accommodating cavity 132 facing away from the partition 133. A first bearing 15 can be assembled into the first accommodating cavity 131 through the first port, and a second rotor 123 can be assembled into the second accommodating cavity 132 through the second port. The second rotor 123 is separated from the first bearing 15 by the partition 133. The partition 133 has a through hole for the rotor shaft 121 to pass through, and the rotor shaft 121 passes through the partition 133 and engages with the first bearing 15 and the second rotor 123. An extension portion 13b is disposed on the outer periphery of the second port, and an annular cavity 134 is formed between the extension portion 13b and the outer peripheral surface of the body 13a. For example, the extension portion 13b may include a first folded edge extending outward from the outer edge of the second port, and a second folded edge extending towards the first port from the outer edge of the first folded edge, the gap between the second folded edge and the outer peripheral surface of the body 13a forming the annular cavity 134. The stator assembly 11 is sleeved on the periphery of the body 13a, and one end of the stator assembly 11 near the second port is accommodated in the annular cavity 134. After the stator assembly 11 is sleeved on the periphery of the body 13a, one end of the stator assembly 11 can be accommodated in the annular cavity 134 to position the stator, and the stator assembly 11 can also be fixed to the shielding cover 13 by potting glue in the annular cavity 134. In order to ensure that the end face of the stator assembly 11 is spaced from the bottom wall of the annular cavity 134, optionally, the inner peripheral wall of the annular cavity 134 facing the first port is provided with a positioning step that abuts against the end face of the stator assembly 11.

[0062] like Figure 3 and Figure 5 As shown, in one embodiment, the second rotor 123 includes a rotor sleeve 1231 and a second magnetic ring 1232, which are sequentially fitted around the rotor shaft 121 from the inside out. The rotor shaft 121, rotor sleeve 1231, and second magnetic ring 1232 are integrally formed by injection molding. In this embodiment, the rotor shaft 121, rotor sleeve 1231, and second magnetic ring 1232 are fixed together to achieve synchronous rotation. The rotor shaft 121 and second magnetic ring 1232 can be made of metal, and the rotor sleeve 1231 can be made of injection molded parts. These three components can be constructed into an integral structure through insert injection molding, making the overall structure more stable.

[0063] like Figure 3As shown, in one embodiment, the second accommodating cavity 132 has an opening on the side opposite to the partition 133. The drive motor also includes an end cover 14, which is connected to the shield 13 and covers the opening of the second accommodating cavity 132. The end cover 14 is provided with a through hole for the rotor shaft 121 to pass through. The rotor shaft 121 passes through one end of the end cover 14 and is connected to the pump wheel 31.

[0064] In this embodiment, the end cap 14 and the shield 13 can be connected by means of threaded connection, welding, etc. When the second rotor 123 is assembled in the second accommodating cavity 132, connecting the end cap 14 and the shield 13 can confine the second rotor 123 within the second accommodating cavity 132, thereby ensuring the installation reliability of the entire rotor assembly 12 and the shield 13. The end cap 14 is provided with a through hole, and one end of the rotor shaft 121 can pass through the through hole to the side of the end cap 14 away from the shield 13, thereby connecting with the pump wheel 31.

[0065] To further improve the rotational stability of the rotor assembly 12, optionally, the partition 133 and / or the end cover 14 are provided with a second bearing 16, which is sleeved around the rotor shaft 121. In this way, multiple parts of the rotor shaft 121 can be supported simultaneously by the first bearing 15 and the second bearing 16, making the rotation of the rotor shaft 121 more stable, thereby improving the rotational stability of the rotor assembly 12. Optionally, the partition 133 and the end cover 14 are each provided with a second bearing 16.

[0066] In practical applications, water from the pump assembly may enter the second accommodating cavity 132 through the perforation in the end cover 14. Optionally, the second bearing 16 can be a graphite bearing or a ceramic bearing. This gives the second bearing 16 good wear resistance and corrosion resistance, and the water entering the second accommodating cavity 132 will also lubricate the second bearing 16 to ensure the rotational stability of the second rotor 123.

[0067] To ensure the installation stability of the second bearing 16 and the second rotor 123, optionally, such as Figure 3 As shown, bearing chambers are respectively provided on the opposing sides of the partition 133 and the end cover 14. Each bearing chamber is equipped with a second bearing 16, and a shim 17 is provided between each second bearing 16 and the second rotor 123. The shim 17 can limit the axial movement of the second bearing 16 and the second rotor 123. Optionally, the shim 17 is a ceramic shim 17, which has high wear resistance and corrosion resistance, and can also be lubricated when immersed in water, reducing frictional resistance.

[0068] like Figure 3As shown, in one embodiment, the water pump assembly further includes a pump cover 33, which is located on the side of the end cover 14 away from the shield 13. The pump cover 33 and the end cover 14 enclose a pump chamber for accommodating the pump impeller 31. The pump cover 33 has an inlet and an outlet that communicate with the pump chamber. In this embodiment, the end cover 14 and the pump cover 33 cooperate to form a pump chamber for accommodating the pump impeller 31. When the rotor shaft 121 rotates, it drives the pump impeller 31 to rotate, allowing external liquid to be drawn into the pump chamber through the inlet and discharged through the outlet, thereby realizing the water pump function.

[0069] like Figure 2 As shown, to improve the sealing performance of the fan-pump assembly, in one embodiment, a first sealing element 41 is provided between the shield 13 and the end cover 14. The first sealing element 41 is used to seal the mating parts of the shield 13 and the end cover 14. By providing the first sealing element 41, the shield 13 and the end cover 14 are sealed together, preventing water inside the shield 13 from leaking out from the mating parts. And / or, a second sealing element 42 is provided between the end cover 14 and the pump cover 33. The second sealing element 42 is used to seal the mating parts of the end cover 14 and the pump cover 33. By providing the second sealing element 42, the end cover 14 and the pump cover 33 are sealed together, preventing water inside the pump chamber from leaking out from the mating parts. The first sealing element 41 and the second sealing element 42 include, but are not limited to, sealing rings, sealant, etc.

[0070] Optionally, in one embodiment, the end cover 14 includes a cover plate and a first flange extending from the periphery of the end cover 14 toward the shield 13. The cover plate has a through hole in the middle for the rotor shaft 121 to pass through, and the portion of the cover plate facing the second receiving cavity 132 may also have a bearing chamber for mounting the second bearing 16. Optionally, the end face of the shield 13 has a first positioning groove for inserting the first flange of the end cover 14. Optionally, the inner circumferential surface of the first flange has a first sealing groove for receiving the first seal 41 to ensure the reliable installation of the first seal 41.

[0071] Optionally, in one embodiment, the end cap 14 further includes a second flange on the side of the end cap 14 facing away from the shield 13, and a second positioning groove is provided on the side of the end cap 14 facing the pump cover 33. The open end of the pump cover 33 is inserted into the second positioning groove, and the inner circumferential surface of the pump cover 33 is limited and abutted against the second flange. Optionally, the inner circumferential surface of the pump cover 33 is provided with a second sealing groove for accommodating the second sealing member 42 to ensure the reliable installation of the second sealing member 42.

[0072] The present invention also proposes a water heater comprising a flue system, a heat exchanger, a water system, and a fan-pump assembly. The flue system is used for the circulation of flue gas; the heat exchanger is located in the flue system for exchanging heat with the flue gas within the flue system; the water system is connected to the heat exchanger; the fan-pump assembly includes a drive motor, a fan assembly, and a pump assembly. The drive motor includes a stator assembly 11 and a rotor assembly 12 rotatable relative to the stator assembly 11. The rotor assembly 12 has a first output end 12a and a second output end 12b axially opposed to each other; the fan assembly includes a fan wheel 21 drivenly connected to the first output end 12a; the pump assembly includes a pump wheel 31 drivenly connected to the second output end 12b; a magnetic circuit is formed between the stator assembly 11 and the rotor assembly 12 to drive the rotor assembly 12 to rotate, thereby driving the fan wheel 21 and the pump wheel 31 to rotate. The fan assembly is connected to the flue system to drive airflow along the flue system, and the pump assembly is connected to the water system to drive water flow along the water system. The specific structure of the fan and 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 water heater includes, but is not limited to, gas water heaters and wall-hung boilers. Gas water heaters include, but are not limited to, forced-draft gas water heaters and forced-extraction gas water heaters.

[0073] 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 the flue gas system, and the inlet pipe connects to the outlet pipe via the heat exchanger to form the outlet water system. The fan assembly can be connected to either the inlet or outlet end of the flue gas system; the water pump assembly 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 fan assembly can be connected to the burner (i.e., the fan assembly is connected to the inlet end of the flue system). In this case, the fan assembly driven by the drive unit can function as a forced-draft fan. On one hand, it can drive the high-temperature flue gas generated by the burner combustion through the combustion chamber to the heat exchanger for heat exchange, and then drive the heat-exchanged flue gas to be collected by the fume hood and discharged outside the water heater. On the other hand, the fan assembly 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 fan assembly can be connected to the fume hood (i.e., the fan assembly is connected to the outlet end of the flue system). In this case, the fan assembly driven by the drive unit can function as a forced-extraction fan, drawing the high-temperature flue gas generated by the burner combustion towards the fume hood, and finally discharging it outside the water heater through the air outlet of the fan assembly. The water pump assembly can be connected in series in the water system. The water pump assembly driven by the drive device can realize the function of water pressure increase and flow increase, and realize the function of water pump.

[0074] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fan pump assembly, characterized by, The utility model relates to a kind of drive motor, including: drive motor, including stator assembly and the rotatable rotor assembly of stator assembly, the rotor assembly has axially opposite first output end and second output end;Fan assembly, including the fan wheel of the first output end driving connection;AndWater pump assembly, including the pump wheel of the second output end driving connection;The magnetic circuit between the stator assembly and the rotor assembly is constructed, for driving the rotor assembly rotates, and drives the fan wheel and the pump wheel rotation. The rotor assembly includes rotor shaft, and first rotor and second rotor connected with the rotor shaft, the stator assembly and the first rotor are constructed first magnetic circuit, the stator assembly and the second rotor are constructed second magnetic circuit, the magnetic pole number of the first rotor is same with the magnetic pole number of the second rotor, the first rotor and the second rotor rotate to drive the rotor shaft rotates, and the fan wheel and the pump wheel are respectively arranged at both ends of the rotor shaft. The drive motor further includes shield, the rotor shaft passes through the shield and is rotatably connected with the shield, the stator assembly is sleeved on the periphery of the shield, the first rotor is sleeved on the periphery of the stator assembly, the second rotor is arranged in the shield and is sleeved on the periphery of the rotor shaft, one end of the rotor shaft is connected with the first rotor, the first rotor is connected with the fan wheel as the first output end, and the end of the rotor shaft away from the fan wheel is connected with the pump wheel as the second output end. The rotor shaft is made of metal, the pump wheel is made of injection molding, the pump wheel is provided with mounting hole, nut is embedded in the mounting hole, and the rotor shaft is threadedly connected with the nut. The first rotor includes rotor shell and first magnetic ring, the rotor shell is sleeved on the periphery of the stator assembly, the first magnetic ring is fixedly arranged on the inner circumferential surface of the rotor shell and opposite to the stator assembly, one end of the rotor shaft is connected with the rotor shell, and the fan wheel is fixed to the rotor shell. The end of the shield close to the fan wheel is provided with first accommodating cavity, the end of the shield close to the pump wheel is provided with second accommodating cavity, the shield has partition plate separating the first accommodating cavity and the second accommodating cavity, the rotor shaft penetrates the partition plate, the first accommodating cavity is provided with first bearing sleeved on the periphery of the rotor shaft, and the second accommodating cavity is provided with the second rotor.

2. The fan pump assembly of claim 1, wherein, The second rotor includes rotor sleeve and second magnetic ring, which are sequentially sleeved on the periphery of the rotor shaft from inside to outside, and the rotor shaft, the rotor sleeve and the second magnetic ring are integrally formed by injection molding.

3. The fan pump assembly of claim 2, wherein, The second accommodating cavity has an opening on the side away from the partition plate, the drive motor further includes end cover, the end cover is connected with the shield and covers the opening of the second accommodating cavity, the end cover is provided with through hole for the rotor shaft to pass through, one end of the rotor shaft penetrating out of the end cover is connected with the pump wheel, the partition plate and / or the end cover is provided with second bearing, and the second bearing is sleeved on the periphery of the rotor shaft.

4. The fan pump assembly of claim 3, wherein, The second bearing is made of graphite bearing or ceramic bearing.

5. The fan pump assembly of claim 3, wherein, ​ 6. The fan pump assembly of any one of claims 3 to 5, wherein, ​ 7. The fan pump assembly of claim 6, wherein, ​ 8. The fan pump assembly of claim 6, wherein, ​ 9. The fan pump assembly of claim 8, wherein, ​ And / or, the opposite sides of the partition plate and the end cover are respectively provided with bearing chambers, each of which is provided with the second bearing.

10. The fan pump assembly of claim 8, wherein, The water pump assembly further comprises a pump cover, which is arranged on the side of the end cover away from the shield cover, and a pump cavity for accommodating the pump wheel is formed between the pump cover and the end cover, the pump cover is provided with a liquid inlet and a liquid outlet which are respectively in communication with the pump cavity.

11. The fan pump assembly of claim 10, wherein, A first sealing member is arranged between the shield cover and the end cover, and is used to seal and connect the fitting parts of the shield cover and the end cover; And / or, a second sealing member is arranged between the end cover and the pump cover, and is used to seal and connect the fitting parts of the end cover and the pump cover.

12. A water heater, characterized by Comprise: A flue system for passing flue gas flow; A heat exchanger arranged in the flue system for exchanging heat with the flue gas in the flue system; And A water system in communication with the heat exchanger; And The fan water pump assembly according to any one of claims 1 to 11, the fan assembly is in communication with the flue system for driving the airflow to flow along the flue system, and the water pump assembly is in communication with the water system for driving the water flow to flow along the water system.

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