Fan water pump assembly and water heater

Abstract

The utility model 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 provided by the utility model, the fan and the water pump can be integrated into a whole to share one set of driving motor, and when the driving motor is applied to the water heater, the cost of the water heater can be reduced, the volume of the water heater is reduced, and the assembly efficiency of the water heater is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly relates to a fan and water pump assembly and a water heater. Background Art

[0002] In related technologies, some water heaters contain a fan and a water pump at the same time. The fan and the water pump need to be separately configured with a set of motors for driving, and each motor needs to be correspondingly provided with a set of electronic control systems. This makes the cost of the water heater relatively high, and the two motors need to occupy a large installation space inside the water heater, making the volume and size of the water heater relatively large, and also affecting the assembly efficiency of the whole water heater. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a fan and water pump assembly and a water heater, aiming to integrate the fan and the water pump into one body and share a set of driving motors. When applied to a water heater, it can reduce the cost of the water heater, reduce the volume of the water heater, and improve the assembly efficiency of the water heater.

[0004] To achieve the above purpose, the fan and water pump assembly proposed by the utility model includes:

[0005] A driving motor, including a stator assembly and a rotor assembly rotatable relative to the stator assembly. The rotor assembly has a first output end and a second output end axially opposite to each other;

[0006] A fan assembly, including a wind wheel drivingly connected to the first output end; and

[0007] A water pump assembly, including a pump wheel drivingly connected to the second output end;

[0008] A magnetic circuit is configured between the stator assembly and the rotor assembly to drive the rotation of the rotor assembly and drive the rotation of the wind wheel and the pump wheel.

[0009] In an 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 configured between the stator assembly and the first rotor, and a second magnetic circuit is configured between the stator assembly and the second rotor. The number of magnetic poles of the first rotor is the same as that of the second rotor. The first rotor and the second rotor rotate to drive the rotation of the rotor shaft, and the wind wheel and the pump wheel are respectively arranged at both ends of the rotor shaft.

[0010] In one embodiment, the drive motor also includes a shielding cover, the rotor shaft passes through the shielding cover and is rotatably connected to the shielding cover, the stator assembly is sleeved on the periphery of the shielding cover, the first rotor is sleeved on the periphery of the stator assembly, the second rotor is arranged in the shielding cover and sleeved on the periphery of the rotor shaft, the first rotor is connected to one end of the rotor shaft, the first rotor serves as the first output end to connect to the wind wheel, and the end of the rotor shaft away from the wind wheel serves as the second output end to connect to the pump wheel.

[0011] In one embodiment, the rotor shaft is made of metal, the pump wheel is made of injection molding, the pump wheel is provided with 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 shell and a first magnetic ring, the rotor shell is sleeved on the periphery of the stator assembly, the first magnetic ring is fixed to the inner circumference of the rotor shell at a position opposite to the stator assembly, one end of the rotor shaft is connected to the rotor shell, and the wind wheel is fixed to the rotor shell.

[0013] In one embodiment, the shielding cover is provided with a first accommodating chamber at one end close to the wind wheel, and a second accommodating chamber is provided at one end close to the pump wheel. The shielding cover has a partition separating the first accommodating chamber and the second accommodating chamber, and the rotor shaft passes through the partition. The first accommodating chamber is provided with a first bearing sleeved on the outer periphery of the rotor shaft, and the second accommodating chamber is provided with the second rotor.

[0014] In one embodiment, the second rotor includes a rotor sleeve and a second magnetic ring which are sequentially sleeved on the periphery of the rotor shaft from the inside to the outside, and the rotor shaft, the rotor sleeve and the second magnetic ring are formed into an integrated structure by injection molding.

[0015] In one embodiment, the second accommodating chamber has an opening on a side away from the partition, and the drive motor also includes an end cover, which is connected to the shielding cover and covers the opening of the second accommodating chamber, and the end cover is provided with a through hole for the rotor shaft to pass through, and the rotor shaft passes through one end of the end cover and is connected to the pump wheel, and the partition and / or the end cover are provided with a second bearing, and the second bearing is sleeved on the outer periphery of the rotor shaft.

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

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

[0018] In one embodiment, the water pump assembly further includes a pump cover, which is disposed on a side of the end cover facing away from the shielding cover, and the pump cover and the end cover enclose a pump chamber for accommodating the pump wheel, and the pump cover is provided with a liquid inlet and a liquid outlet respectively connected to the pump chamber.

[0019] In one embodiment, a first seal is provided between the shielding cover and the end cover, and the first seal is used to seal and connect the matching parts of the shielding cover and the end cover;

[0020] And / or, a second seal is provided between the end cover and the pump cover, and the second seal is used for sealingly connecting the matching parts of the end cover and the pump cover.

[0021] The utility model also provides a water heater, comprising:

[0022] Flue system for the circulation of smoke;

[0023] a heat exchanger, provided in the flue system, for exchanging heat with the flue gas in the flue system; and

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

[0025] In the fan-water pump assembly as described above, the fan component is connected to the flue system to drive the airflow to flow along the flue system, and the water pump component is connected to the water system to drive the water flow to flow along the water system.

[0026] The fan-water pump assembly of the technical solution of the utility model can integrate the fan function and the water pump function by sharing a set of drive motors for the fan assembly and the water pump assembly. Among them, the rotor assembly has a first output end connected to the wind wheel of the fan assembly, and a second output end connected to the pump wheel of the water pump assembly. In this way, when the drive motor drives the rotor assembly to rotate, the first output end and the second output end can synchronously output torques of the same magnitude, thereby driving the wind wheel and the pump wheel to rotate at the same speed. In this way, only one set of drive motors and electronic control systems are needed to achieve the same speed operation of the fan and the water pump. When the fan-water pump assembly is applied to a water heater, only one set of drive motors needs to be configured to realize both the fan and water pump functions, which can reduce the cost of the water heater; and the fan-water pump assembly has a higher degree of integration, which reduces the number of drive motors, thereby saving the internal installation space of the water heater and helping to reduce the volume of the water heater; and when assembling the water heater, only the fan-water pump assembly needs to be installed on the water heater body at one time. Compared with traditional water heaters that need to install the fan and water pump separately on the water heater body during assembly, this solution can simplify the installation steps, thereby improving the assembly efficiency of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0028] Figure 1 Schematic exploded view of an embodiment of the fan and pump assembly provided by the present invention;

[0029] Figure 2 Schematic cross-sectional view of an embodiment of the fan and pump assembly provided by the present invention;

[0030] Figure 3 For Figure 2 Cross-sectional view of the structure with the wind wheel omitted;

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

[0032] Figure 5 Schematic exploded view of an embodiment of the rotor assembly provided by the present invention;

[0033] Figure 6 Schematic structure diagram of an embodiment of the shielding cover provided by the present invention.

[0034] Explanation of the reference numerals in the drawings:

[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 part; 14. End cover; 15. First bearing; 16. Second bearing; 17. Gasket; 21. Wind wheel; 31. Pump impeller; 32. Nut; 33. Pump cover; 41. First seal; 42. Second seal.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

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

[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] In related technologies, some water heaters contain both a blower and a water pump at the same time, and the blower and the water pump need to be separately equipped with a set of motors for driving. For example, the blower and the water pump are respectively equipped with a motor, and each motor needs to be correspondingly provided with a set of electronic control systems, which makes the cost of the water heater relatively high. In addition, the two sets of motors need to occupy a relatively large installation space inside the water heater, making the volume and size of the water heater relatively large, and also affecting the assembly efficiency of the whole water heater.

[0041] The present utility model provides a blower and water pump assembly, which can integrate the blower and the water pump into one body and share a set of driving motors. When applied to a water heater, it can reduce the cost of the water heater, reduce the volume of the water heater, and improve the assembly efficiency of the water heater.

[0042] Please refer to Figures 1 to 3, in an embodiment of the present utility model, the fan and water pump assembly includes a driving motor, a fan assembly, and a water pump assembly. The driving motor includes a stator assembly 11 and a rotor assembly 12 that can rotate 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; the fan assembly includes a wind wheel 21 drivingly connected to the first output end 12a; the water pump assembly includes a pump wheel 31 drivingly connected to the second output end 12b; a magnetic circuit is configured between the stator assembly 11 and the rotor assembly 12 for driving the rotor assembly 12 to rotate and driving the wind wheel 21 and the pump wheel 31 to rotate.

[0043] In this embodiment, the driving motor is used to provide power for the fan assembly and the water pump assembly. The driving motor includes a stator assembly 11 and a rotor assembly 12. The stator assembly 11 and the rotor assembly 12 are sleeved and fitted, and a magnetic circuit is formed between the stator assembly 11 and the rotor assembly 12 through an air gap. The rotor assembly 12 may include a single rotor or may include two or more rotors. Optionally, the rotor assembly 12 includes at least two rotors, which can improve the motor power density and increase the output torque. As Figure 4 shown, the stator assembly 11 may include a stator core 111 and a winding coil 112 wound around the stator core 111. The winding coil 112 is electrically connected to an electric control system. When the coil winding is energized, it can generate a magnetic field, thereby driving the rotor assembly 12 to rotate. Among them, the stator core 111 may include a stator iron core and an insulation system covering the surface of the stator iron core. Through the insulation system, the coil winding can be separated from the stator iron core to avoid scratching the coil winding or the risk of short circuit. Among them, the insulation system can be realized by spraying an insulating layer on the surface of the stator iron core or by assembling an insulating skeleton outside the stator iron core. The rotor assembly 12 has a first output end 12a and a second output end 12b that are axially opposite. The first output end 12a is drivingly connected to the wind wheel 21 of the fan assembly, and the second output end 12b is drivingly connected to the pump wheel 31 of the water pump assembly. When the driving motor drives the rotor assembly 12 to rotate, the first output end 12a and the second output end 12b can synchronously output the same torque, thereby driving the wind wheel 21 and the pump wheel 31 to rotate at the same speed. In this way, only one set of driving motor and electric control system is needed to realize the same rotational speed operation of the fan and the water pump, and the rotational speeds of the fan and the water pump are the same, reducing the control difficulty of the electric control system.

[0044] When the fan and water pump assembly is applied to a water heater, the fan assembly can be connected to the flue system of the water heater to drive the air flow to flow along the flue system, and the water pump assembly can be connected to the water circuit system of the water heater to drive the water flow to flow along the water circuit system. For example, the water heater includes a burner, a combustion chamber box body, a heat exchanger and a smoke collecting hood arranged in sequence, and the heat exchanger is connected with a water inlet pipe and a water outlet pipe. Among them, the flue gas flow path between the burner and the smoke collecting hood constitutes the flue system, and the water inlet pipe is communicated with the water outlet pipe through the heat exchanger to constitute the water circuit system. The fan assembly can be connected to the inlet end of the flue system or the outlet end of the flue system; the water pump assembly can be connected in series to the water inlet pipe or the water outlet pipe. For example, when the fan and water pump assembly is applied to a forced draft gas water heater, the air outlet of the fan assembly can be connected to the burner (that is, the fan assembly is connected to the inlet end of the flue system). At this time, the fan assembly driven by the drive motor can realize the function of a forced draft blower. On the one hand, it can drive the high-temperature flue gas generated by the combustion of the burner to flow through the combustion chamber box body to the heat exchanger for heat exchange, and drive the flue gas after heat exchange to be collected by the smoke collecting hood and discharged outside the water heater; on the other hand, the fan assembly can also be used to convey air into the burner to supplement the secondary air required for combustion. Another example is that when the fan and water pump assembly is applied to a forced exhaust gas water heater, the air inlet of the fan assembly can be connected to the smoke collecting hood (that is, the fan assembly is connected to the outlet end of the flue system). At this time, the fan assembly driven by the drive motor can realize the function of a forced exhaust fan, and can suck the high-temperature flue gas generated by the combustion of the burner in the direction of the smoke collecting hood, and finally discharge it outside the water heater from the air outlet of the fan assembly. The water pump assembly can be connected in series in the water circuit system, and the water pump assembly driven by the drive motor can play the role of increasing the water pressure and flow rate in the water circuit and realize the water pump function.

[0045] The fan and water pump assembly of the technical solution of the utility model integrates the fan function and the water pump function by sharing a set of drive motors for the fan assembly and the water pump assembly. Among them, the rotor assembly 12 has a first output end 12a drivingly connected to the wind wheel 21 of the fan assembly and a second output end 12b drivingly connected to the pump wheel 31 of the water pump assembly. In this way, 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 torque, and then can drive the wind wheel 21 and the pump wheel 31 to rotate at the same speed. In this way, only one set of drive motors and electronic control systems are needed to realize the same rotational speed operation of the fan and the water pump. When the fan and water pump assembly is applied to a water heater, only one set of drive motors need to be configured to realize the functions of both the fan and the water pump, which can reduce the cost of the water heater; and the integration degree of the fan and water pump assembly is higher, the number of drive motors is reduced, and then the internal installation space of the water heater can be saved, which is beneficial to reducing the volume of the water heater; and when assembling the water heater, only the fan and water pump assembly needs to be installed on the water heater body 13a at one time. Compared with the traditional water heater that needs to install the fan and the water pump on the water heater body 13a separately during assembly, this solution can simplify the installation steps and thus improve the assembly efficiency of the water heater.

[0046] In addition, the above-mentioned fan and water pump assembly enables the fan and the water pump to share a set of drive motors, which can cool the drive motor when the water pump passes through cold water, which is beneficial to reducing the temperature rise of the drive motor and improving the service life. And when the volume of the water heater remains unchanged, the above-mentioned fan and water pump assembly saves a set of drive motors, saves the internal installation space of the water heater, and enables more installation space to be vacated inside the water heater for the installation of other expansion function modules.

[0047] As Figure 2 shown, in an 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 configured between the stator assembly 11 and the first rotor 122, and a second magnetic circuit is configured between the stator assembly 11 and the second rotor 123. The number of magnetic poles of the first rotor 122 is the same as that of the second rotor 123. The first rotor 122 and the second rotor 123 rotate to drive the rotor shaft 121 to rotate. The wind wheel 21 and the pump wheel 31 are respectively arranged 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. Among them, there are various arrangements between the first rotor 122, the second rotor 123 and the stator assembly 11. For example, the first rotor 122 and the second rotor 123 can be arranged radially along the stator assembly 11, or the first rotor 122 and the second rotor 123 are arranged axially along the stator assembly 11 and so on. The stator assembly 11 and the first rotor 122 form a first magnetic circuit through an air gap. After the coil winding of the stator assembly 11 is 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. After the coil winding of the stator assembly 11 is energized, the second rotor 123 can be driven to rotate by the magnetic field of the second magnetic circuit, and then the rotor shaft 121 is driven to rotate by the first rotor 122 and the second rotor 123. Since the number of magnetic poles of the first rotor 122 and the second rotor 123 is the same, the pole-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. In this way, when the drive motor works, the first rotor 122 and the second rotor 123 can be driven to rotate at the same speed, and then the rotor shaft 121 is simultaneously driven to rotate by the first rotor 122 and the second rotor 123, so that the same magnitude of torque can be synchronously output at both ends of the rotor shaft 121, and further the wind wheel 21 and the pump wheel 31 can rotate at the same speed. Compared with the traditional single-stator single-rotor motor, the drive motor in this solution includes at least two rotors, namely the first rotor 122 and the second rotor 123, which can improve the power density of the motor and increase the output torque. In addition, the first rotor 122 and the second rotor 123 share a stator assembly 11. Compared with the double-stator double-rotor motor, one stator can be omitted, the overall structure is simpler, the cost is lower, and the volume is smaller.

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

[0050] In this embodiment, the shielding cover 13 can serve as the mounting carrier for the stator assembly 11 and the rotor assembly 12, providing a stable supporting effect on the stator assembly 11 and the rotor assembly 12. The stator assembly 11 is sleeved around the periphery of the shielding cover 13, and the stator assembly 11 and the shielding cover 13 can be fixed by potting (such as potting epoxy resin material) or BMC injection molding. The first rotor 122 is an outer rotor rotatably sleeved around the periphery of the stator assembly 11, and the second rotor 123 is an inner rotor rotatably arranged in the shielding cover 13. In this way, the first rotor 122 and the second rotor 123 are arranged radially along the stator assembly 11, and the overall arrangement structure is simple. Moreover, both the first rotor 122 and the second rotor 123 can be rotatably connected to the shielding cover 13 through the rotor shaft 121. The first rotor 122 can serve as the first output end 12a of the rotor assembly 12 to drive the wind wheel 21 to rotate, and one end of the rotor shaft 121 away from the wind wheel 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 a metal part, the pump wheel 31 is made of an injection molded part, the pump wheel 31 is provided with a mounting hole, and a nut 32 is embedded in the mounting hole. 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 rotor shaft 121, in order to ensure the overall structural strength, the rotor shaft 121 can be made of a metal shaft made of a metal part to prevent deformation or fracture during rotation, so as to ensure the reliability of the operation of the fan and water pump assembly. The pump wheel 31 is made of an injection molded part, which can reduce the weight of the pump wheel 31. At the same time, it is also convenient to embed a nut 32 in the mounting hole of the pump wheel 31 by insert injection molding. The nut 32 can be a metal nut 32. The outer peripheral surface of one end of the rotor shaft 121 connected to the pump wheel 31 is provided with an external thread. During assembly, the nut 32 on the pump wheel 31 is threadedly connected to the rotor shaft 121, and the installation structure is simple. And with this installation method, when the pump wheel 31 is damaged, the pump wheel 31 can be removed and replaced separately without replacing the rotor shaft 121 or even the entire rotor assembly 12, which is convenient for the maintenance of the water pump assembly and reduces the maintenance cost.

[0053] As Figure 2 、 Figure 3 and Figure 5 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 around the periphery of the stator assembly 11, and the first magnetic ring 1222 is fixedly arranged at a position on the inner peripheral surface of the rotor housing 1221 opposite to the stator assembly 11. One end of the rotor shaft 121 is connected to the rotor housing 1221, and the wind wheel 21 is fixed to the rotor housing 1221.

[0054] In this embodiment, a first magnetic circuit is formed between the first magnetic ring 1222 and the stator assembly 11 through an air gap. When the driving motor operates, the magnetic field in the first magnetic circuit drives the first magnetic ring 1222 to rotate, and then drives the rotor housing 1221 and the rotor shaft 121 to rotate through the first magnetic ring 1222. The wind wheel 21 of the fan assembly is fixedly connected to the rotor housing 1221 of the first rotor 122, and the rotation of the rotor housing 1221 can drive the wind wheel 21 to rotate. During assembly, the first magnetic ring 1222 can be fixed to the inner peripheral surface of the rotor housing 1221 by means of gluing or fastening with fasteners. The wind wheel 21 and the rotor housing 1221 can be integrally formed, or can be a split structure and then assembled and fixed.

[0055] Optionally, in one embodiment, the rotor housing 1221 has an end plate and a side enclosure plate provided at the periphery of the end plate and extending toward one side. The side enclosure plate surrounds the periphery of the stator assembly 11. A first magnetic ring 1222 is fixedly provided at a position on the inner peripheral surface of the side enclosure plate opposite to the stator assembly 11. The end plate is disposed opposite to one end of the shielding cover 13. The end plate is provided with a through hole for the rotor shaft 121 to be inserted, and the rotor shaft 121 is in interference fit with the through hole. To ensure the structural strength of the assembly of the rotor shaft 121 and the through hole, optionally, the end plate is provided with a flange extending axially along 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, as Figure 2 shown, one end of the wind wheel 21 has a concave cavity, and at least a part of the rotor housing 1221 is received in the concave cavity of the wind wheel 21. In this way, the cooperation between the wind wheel 21 and the rotor housing 1221 is closer, and it is also beneficial to reduce the axial dimension of the fan and water pump assembly, thereby reducing the volume of the fan and water pump assembly. Optionally, the rotor housing 1221 and the wind wheel 21 are assembled by stamping and form an interference fit.

[0057] In one embodiment, the wind wheel 21 and the rotor housing 1221 are integrally formed. For example, the wind wheel 21 and the rotor housing 1221 can be integrally injection molded by injection molding. In this way, the installation structure of the wind wheel 21 can be simplified, and the connection reliability between the wind wheel 21 and the rotor housing 1221 can be ensured, thereby ensuring the stability of the operation of the wind wheel 21. Of course, in other embodiments, the wind wheel 21 and the rotor housing 1221 can also be assembled and fixed by means of snap connection, threaded connection, etc.

[0058] In one embodiment, the fan assembly further includes a volute casing, and the drive motor further includes a motor housing. The first rotor 122, the second rotor 123, and the stator assembly 11 are accommodated in the motor housing. The volute casing and the motor housing enclose a fan chamber. The impeller 21 is disposed in the fan chamber. The volute casing is further provided with an air inlet and an air outlet that are respectively communicated with the fan chamber. Thus, when the first rotor 122 drives the impeller 21 to rotate, a negative pressure can be generated at the air inlet to suck external air flow into the fan chamber and then discharge it from the air outlet, so as to achieve the fan function.

[0059] As Figure 3 shown, in one embodiment, a first accommodation cavity 131 is provided at one end of the shielding cover 13 close to the impeller 21, a second accommodation cavity 132 is provided at one end of the shielding cover 13 close to the pump impeller 31, the shielding cover 13 has a partition plate 133 that separates the first accommodation cavity 131 and the second accommodation cavity 132, the rotor shaft 121 penetrates through the partition plate 133, the first accommodation cavity 131 is provided with a first bearing 15 sleeved around the outer periphery of the rotor shaft 121, and the second rotor 123 is disposed in the second accommodation cavity 132.

[0060] In this embodiment, the first bearing 15 can support the rotor shaft 121, so that the rotor shaft 121 is rotatably connected to the shielding cover 13. Optionally, at least two first bearings 15 are provided along the axial direction of the rotor shaft 121, which can provide a more stable support for the rotor shaft 121, thereby ensuring the rotational stability of the rotor assembly 12. The second rotor 123 is disposed in the second accommodation cavity 132, and the second rotor 123 and the stator assembly 11 are separated by the shielding cover 13.

[0061] Optionally, as Figure 3 and Figure 6As shown, the shielding cover 13 includes a body 13a and an extension portion 13b. The body 13a is in the shape of a cylinder with both ends open. A partition 133 is provided inside the body 13a. The partition 133 divides the inner cavity of the body 13a into a first accommodation cavity 131 and a second accommodation cavity 132. A first port is formed at one end of the first accommodation cavity 131 facing away from the partition 133, and a second port is formed at one end of the second accommodation cavity 132 facing away from the partition 133. The first bearing 15 can be assembled into the first accommodation cavity 131 through the first port, and the second rotor 123 can be assembled into the second accommodation cavity 132 through the second port. The second rotor 123 and the first bearing 15 are separated by the partition 133. The partition 133 is provided with a through hole for the rotor shaft 121 to pass through. The rotor shaft 121 passes through the partition 133 and is inserted and matched with the first bearing 15 and the second rotor 123. The extension portion 13b is provided at the outer peripheral edge of the second port. 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 toward 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 forms the annular cavity 134. The stator assembly 11 is sleeved on the periphery of the body 13a. One end of the stator assembly 11 close to the second port is accommodated in the annular cavity 134. After the stator assembly 11 is sleeved on the outer periphery of the body 13a, one end of the stator assembly 11 can be accommodated in the annular cavity 134 to position the stator. The stator assembly 11 and the shielding cover 13 can also be fixed by potting in the annular cavity 134. Optionally, in order to ensure that there is a certain interval between the end face of the stator assembly 11 and the bottom wall of the annular cavity 134, a positioning step for abutting and cooperating with the end face of the stator assembly 11 is provided at one end of the inner peripheral wall of the annular cavity 134 facing the first port.

[0062] As Figure 3 and Figure 5 shown, in one embodiment, the second rotor 123 includes a rotor sleeve 1231 and a second magnetic ring 1232 sleeved on the periphery of the rotor shaft 121 in sequence from inside to outside. The rotor shaft 121, the rotor sleeve 1231 and the second magnetic ring 1232 are integrally formed by injection molding. In this embodiment, the rotor shaft 121, the rotor sleeve 1231 and the second magnetic ring 1232 are fixed together to achieve synchronous rotation. Among them, the rotor shaft 121 and the second magnetic ring 1232 can be made of metal parts, and the rotor sleeve 1231 can be made of injection molded parts. The three can be constructed into an integral structure by insert injection molding, making the overall structure more stable.

[0063] As Figure 3As shown, in one embodiment, the side of the second accommodation cavity 132 facing away from the partition 133 has an opening. The drive motor further includes an end cap 14. The end cap 14 is connected to the shielding cover 13 and covers the opening of the second accommodation cavity 132. The end cap 14 is provided with a perforation for the rotor shaft 121 to pass through. One end of the rotor shaft 121 extending out of the end cap 14 is connected to the pump impeller 31.

[0064] In this embodiment, the end cap 14 and the shielding cover 13 can be connected by means such as threaded connection or welding. When the second rotor 123 is assembled in the second accommodation cavity 132 and the end cap 14 is connected to the shielding cover 13, the second rotor 123 can be limited in the second accommodation cavity 132 to ensure the installation reliability of the entire rotor assembly 12 and the shielding cover 13. The end cap 14 is provided with a perforation, and one end of the rotor shaft 121 can pass through the perforation and extend out of the side of the end cap 14 facing away from the shielding cover 13, so as to be connected to the pump impeller 31.

[0065] To further improve the rotational stability of the rotor assembly 12, optionally, the partition 133 and / or the end cap 14 are provided with a second bearing 16. The second bearing 16 is sleeved around the rotor shaft 121. In this way, the first bearing 15 and the second bearing 16 can simultaneously support multiple parts of the rotor shaft 121, so that the rotor shaft 121 rotates more stably, and further the rotational stability of the rotor assembly 12 can be improved. Optionally, the partition 133 and the end cap 14 are respectively provided with a second bearing 16.

[0066] In actual application, the water in the water pump assembly may enter the second accommodation cavity 132 through the perforation of the end cap 14. Optionally, the second bearing 16 is made of a graphite bearing or a ceramic bearing. So that the second bearing 16 has good wear resistance and corrosion resistance, and the water entering the second accommodation cavity 132 in the water pump assembly will also play a lubricating role on 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, as Figure 3 shown, the partition 133 and the end cap 14 are respectively provided with a bearing chamber on the facing side. Each bearing chamber is provided with a second bearing 16, and a gasket 17 is provided between each second bearing 16 and the second rotor 123. The axial movement of the second bearing 16 and the second rotor 123 can be limited by the gasket 17. Optionally, the gasket 17 is a ceramic gasket 17, which has high wear resistance and corrosion resistance, and can also be lubricated when immersed in water to reduce the frictional resistance.

[0068] As Figure 3As shown, in one embodiment, the water pump assembly further includes a pump cover 33, which is disposed on the side of the end cover 14 away from the shielding cover 13, and the pump cover 33 and the end cover 14 enclose a pump cavity for accommodating the pump wheel 31, and the pump cover 33 is provided with a liquid inlet and a liquid outlet respectively connected to the pump cavity. In this embodiment, the pump cavity for accommodating the pump wheel 31 can be enclosed by the cooperation of the end cover 14 and the pump cover 33, and the pump wheel 31 is driven to rotate when the rotor shaft 121 rotates, so that the external liquid can be sucked into the pump cavity through the liquid inlet, and then discharged from the liquid outlet, so as to realize the water pump function.

[0069] like Figure 2 As shown, in order to improve the sealing performance of the fan water pump assembly, in one embodiment, a first seal 41 is provided between the shielding cover 13 and the end cover 14, and the first seal 41 is used to seal and connect the matching parts of the shielding cover 13 and the end cover 14. By providing the first seal 41, the shielding cover 13 and the end cover 14 are sealed and matched, and the water in the shielding cover 13 is prevented from leaking out from the matching parts of the two. And / or, a second seal 42 is provided between the end cover 14 and the pump cover 33, and the second seal 42 is used to seal and connect the matching parts of the end cover 14 and the pump cover 33. By providing the second seal 42, the end cover 14 and the pump cover 33 are sealed and matched, and the water in the pump cavity is prevented from leaking out from the matching parts of the two. Among them, the first seal 41 and the second seal 42 include but are not limited to the use of sealing rings, sealants, 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 one side of the shielding cover 13, a through hole is provided in the middle of the cover plate for the rotor shaft 121 to pass through, and a bearing chamber for installing the second bearing 16 may also be provided at the portion of the cover plate facing the second accommodating cavity 132. Optionally, a first positioning groove is provided on the end surface of the shielding cover 13 for inserting the first flange of the end cover 14. Optionally, a first sealing groove is provided on the inner circumference of the first flange for accommodating the first sealing member 41 to ensure the installation reliability of the first sealing member 41.

[0071] Optionally, in one embodiment, the end cover 14 further includes a second flange disposed on the side of the end cover 14 facing away from the shielding cover 13, and a second positioning groove is disposed on the side of the end cover 14 facing the pump cover 33, the open end of the pump cover 33 is inserted into the second positioning groove, and the inner circumference of the pump cover 33 is limitedly abutted against the second flange. Optionally, the inner circumference of the pump cover 33 is provided with a second sealing groove for accommodating the second sealing member 42 to ensure the installation reliability of the second sealing member 42.

[0072] The present utility model also provides a water heater, which comprises a flue system, a heat exchanger, a water circuit system and a fan and water pump assembly. The flue system is used for allowing flue gas to flow through; the heat exchanger is arranged in the flue system and is used for exchanging heat with the flue gas in the flue system; the water circuit system is communicated with the heat exchanger; the fan and water pump assembly includes a driving motor, a fan assembly and a water pump assembly. The driving 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 opposite to each other; the fan assembly includes a wind wheel 21 drivingly connected to the first output end 12a; the water pump assembly includes a pump wheel 31 drivingly connected to the second output end 12b; a magnetic circuit is configured between the stator assembly 11 and the rotor assembly 12 for driving the rotor assembly 12 to rotate and driving the wind wheel 21 and the pump wheel 31 to rotate. The fan assembly is communicated with the flue system for driving air flow to flow along the flue system, and the water pump assembly is communicated with the water circuit system for driving water flow to flow along the water circuit system. The specific structure of the fan and water pump assembly refers to the above embodiments. Since this water heater adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. Among them, the water heater includes, but is not limited to, gas water heaters, wall-mounted boilers, etc. Gas water heaters include, but are not limited to, forced-draft gas water heaters, forced-exhaust gas water heaters, etc.

[0073] Taking a gas water heater as an example, the water heater includes a burner, a combustion chamber box body, a heat exchanger and a smoke collecting hood arranged in sequence. The heat exchanger is connected with a water inlet pipe and a water outlet pipe. Among them, the flue gas flow path between the burner and the smoke collecting hood configures the flue system, and the water inlet pipe is communicated with the water outlet pipe via the heat exchanger to configure the water circuit system. The fan assembly can be communicated with the inlet end of the flue system or the outlet end of the flue system; the water pump assembly can be connected in series with the water inlet pipe or the water outlet pipe. For example, when the fan and water pump assembly is applied to a forced-draft gas water heater, the air outlet of the fan assembly can be communicated with the burner (that is, the fan assembly is communicated with the inlet end of the flue system). At this time, the fan assembly driven by the driving device can realize the function of a forced blower. On the one hand, it can drive the high-temperature flue gas generated by the combustion of the burner to flow through the combustion chamber box body to the heat exchanger for heat exchange, and drive the heat-exchanged flue gas to be collected by the smoke collecting hood and discharged outside the water heater; on the other hand, the fan assembly can also be used to transport air into the burner to supplement the secondary air required for combustion of the burner. Another example is that when the fan and water pump assembly is applied to a forced-exhaust gas water heater, the air inlet of the fan assembly can be communicated with the smoke collecting hood (that is, the fan assembly is communicated with the outlet end of the flue system). At this time, the fan assembly driven by the driving device can realize the function of a forced exhaust fan, and can suck the high-temperature flue gas generated by the combustion of the burner towards the direction of the smoke collecting hood, and finally discharge it outside the water heater from the air outlet of the fan assembly. The water pump assembly can be connected in series in the water circuit system, and the water pump assembly driven by the driving device can realize the function of increasing the pressure and flow rate of the water circuit and realize the water pump function.

[0074] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A fan water pump assembly, characterized in that: include: A driving motor, comprising a stator assembly and a rotor assembly rotatable relative to the stator assembly, wherein the rotor assembly has a first output end and a second output end opposite to each other in the axial direction; A fan assembly, comprising a wind wheel drivingly connected to the first output end; as well as A water pump assembly, comprising a pump wheel drivingly connected to the second output end; A magnetic circuit is constructed between the stator assembly and the rotor assembly, which is used to drive the rotor assembly to rotate and drive the wind wheel and the pump wheel to rotate.

2. The fan water pump assembly according to claim 1, characterized in that: The rotor assembly includes a rotor shaft, and a first rotor and a second rotor connected to the rotor shaft, a first magnetic circuit is constructed between the stator assembly and the first rotor, and a second magnetic circuit is constructed between the stator assembly and the second rotor, the number of magnetic poles of the first rotor is the same as the number of magnetic poles of the second rotor, the first rotor and the second rotor rotate to drive the rotor shaft to rotate, and the wind wheel and the pump wheel are respectively arranged at both ends of the rotor shaft.

3. The fan water pump assembly according to claim 2, characterized in that: The driving motor also includes a shielding cover, the rotor shaft passes through the shielding cover and is rotatably connected to the shielding cover, the stator assembly is sleeved on the periphery of the shielding cover, the first rotor is sleeved on the periphery of the stator assembly, the second rotor is arranged in the shielding cover and sleeved on the periphery of the rotor shaft, the first rotor is connected to one end of the rotor shaft, the first rotor serves as the first output end to connect to the wind wheel, and the end of the rotor shaft away from the wind wheel serves as the second output end to connect to the pump wheel.

4. The fan water pump assembly according to claim 3, characterized in that: The rotor shaft is made of metal, the pump wheel is made of injection molding, the pump wheel is provided with a mounting hole, a nut is embedded in the mounting hole, and the rotor shaft is threadedly connected to the nut.

5. The fan water pump assembly according to claim 3, characterized in that: The first rotor includes a rotor shell and a first magnetic ring. The rotor shell is sleeved on the periphery of the stator assembly. The first magnetic ring is fixed to the inner circumference of the rotor shell at a position opposite to the stator assembly. One end of the rotor shaft is connected to the rotor shell, and the wind wheel is fixed to the rotor shell.

6. The fan water pump assembly according to any one of claims 3 to 5, characterized in that: The shielding cover is provided with a first accommodating chamber at one end close to the wind wheel, and a second accommodating chamber at one end close to the pump wheel. The shielding cover has a partition separating the first accommodating chamber and the second accommodating chamber, and the rotor shaft passes through the partition. The first accommodating chamber is provided with a first bearing sleeved on the outer periphery of the rotor shaft, and the second accommodating chamber is provided with the second rotor.

7. The fan water pump assembly according to claim 6, characterized in that: The second rotor comprises a rotor sleeve and a second magnetic ring which are sequentially sleeved on the periphery of the rotor shaft from the inside to the outside, and the rotor shaft, the rotor sleeve and the second magnetic ring are formed into an integrated structure by injection molding.

8. The fan water pump assembly according to claim 6, characterized in that: The second accommodating chamber has an opening on the side away from the partition, and the drive motor also includes an end cover, which is connected to the shielding cover and covers the opening of the second accommodating chamber. The end cover is provided with a through hole for the rotor shaft to pass through, and one end of the rotor shaft passing through the end cover is connected to the pump wheel. The partition and / or the end cover are provided with a second bearing, and the second bearing is sleeved on the outer periphery of the rotor shaft.

9. The fan water pump assembly according to claim 8, characterized in that: The second bearing is a graphite bearing or a ceramic bearing; And / or, the partition plate and the end cover are respectively provided with bearing chambers on the facing sides thereof, each bearing chamber is provided with the second bearing, and a gasket is provided between each second bearing and the second rotor.

10. The fan water pump assembly according to claim 8, characterized in that: The water pump assembly also includes a pump cover, which is arranged on a side of the end cover away from the shielding cover. The pump cover and the end cover enclose a pump cavity for accommodating the pump wheel. The pump cover is provided with a liquid inlet and a liquid outlet respectively connected to the pump cavity.

11. The fan water pump assembly according to claim 10, characterized in that: A first sealing member is provided between the shielding cover and the end cover, and the first sealing member is used to seal and connect the matching parts of the shielding cover and the end cover; And / or, a second seal is provided between the end cover and the pump cover, and the second seal is used for sealingly connecting the matching parts of the end cover and the pump cover.

12. A water heater, characterized in that: include: Flue system for the circulation of smoke; a heat exchanger, arranged in the flue system, for exchanging heat with the flue gas in the flue system; as well as A water system, connected to the heat exchanger; as well as The fan-water pump assembly according to any one of claims 1 to 11, wherein the fan component is connected to the flue system for driving the airflow to flow along the flue system, and the water pump component is connected to the water system for driving the water flow to flow along the water system.

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