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 device, the driving device is at least provided with a first output end and a second output end, and the first output end and the second output end are configured to be capable of independently outputting power; the fan assembly comprises a wind wheel in driving connection with the first output end, and the driving device drives the wind wheel to rotate through the first output end; and the water pump assembly comprises a pump wheel in driving connection with the second output end, and the driving device drives the pump wheel to rotate through the second output end. According to the technical scheme, the fan and the water pump can be integrated into a whole and share one driving device, and when the driving device 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] 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 the related art, some water heaters are equipped with both a fan and a water pump, and the fan and the water pump need to be separately configured with a set of driving devices for driving respectively. For example, the fan 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. In this way, the cost of the water heater is relatively high, and the two sets of driving devices need to occupy a large installation space inside the water heater, resulting in a relatively large volume of the water heater, and also affecting the assembly efficiency of the whole water heater. Summary of the Utility Model

[0003] The main object 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 devices, so that when applied to a water heater, the cost of the water heater can be reduced, the volume of the water heater can be decreased, and the assembly efficiency of the water heater can be improved.

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

[0005] A driving device, the driving device has at least a first output end and a second output end, and the first output end and the second output end are configured to be able to output power independently of each other;

[0006] A fan assembly, the fan assembly includes a wind wheel drivingly connected to the first output end, and the driving device drives the wind wheel to rotate through the first output end; and

[0007] A water pump assembly, the water pump assembly includes a pump wheel drivingly connected to the second output end, and the driving device drives the pump wheel to rotate through the second output end.

[0008] In an embodiment, the driving device includes a dual-rotor motor and an electronic control system electrically connected to the dual-rotor motor, and the dual-rotor motor includes:

[0009] A first rotor, the first rotor defines the first output end;

[0010] A second rotor, the second rotor defines the second output end; and

[0011] A stator assembly, the stator assembly and the first rotor jointly define a first magnetic circuit to drive the first rotor and the wind wheel to rotate, and the stator assembly and the second rotor jointly define a second magnetic circuit to drive the second rotor and the pump wheel to rotate.

[0012] In one embodiment, the stator assembly includes a stator core sleeved around the periphery of the second rotor, and a winding coil wound around the stator core. The winding coil is electrically connected to the electric control system, and the first rotor is sleeved around the periphery of the stator assembly.

[0013] In one embodiment, the stator core is provided with a plurality of stator slots in the circumferential direction, and the winding coil is wound in the plurality of stator slots. The number of magnetic poles of the first rotor is different from the number of magnetic poles of the second rotor, so that the pole-slot ratio of the first rotor to the stator core is different from the pole-slot ratio of the second rotor to the stator core.

[0014] In one embodiment, the dual-rotor motor further includes a shielding cover assembly. The shielding cover assembly includes a shielding cover. The stator assembly is sleeved around the periphery of the shielding cover, the first rotor is sleeved around the periphery of the stator assembly and is rotatably connected to the shielding cover, and the second rotor is rotatably installed in the shielding cover.

[0015] In one embodiment, the shielding cover is provided with a first accommodating cavity and a first port communicating with the first accommodating cavity. A bearing is arranged in the first accommodating cavity. The first rotor includes a rotor shell, a first magnetic ring and a first rotating shaft. The rotor shell is sleeved around the periphery of the stator assembly. The first magnetic ring is fixedly arranged on the inner circumferential surface of the rotor shell and is oppositely arranged with the stator assembly. One end of the first rotating shaft is connected to the bearing, and the other end extends out of the first port and is connected to the rotor shell. The wind wheel is connected to the rotor shell.

[0016] In one embodiment, the wind wheel and the rotor shell are integrally formed.

[0017] In one embodiment, the shielding cover is further provided with a second accommodating cavity and a second port communicating with the second accommodating cavity. The second rotor is rotatably installed in the second accommodating cavity. One end of the second rotor extends out of the second port and is connected to the pump impeller. The water pump assembly further includes a pump cover. The pump cover is arranged at one end of the shielding cover provided with the second port. The pump cover and the shielding cover enclose to form a pump cavity for accommodating the pump impeller. The pump cover is provided with a liquid inlet and a liquid outlet respectively communicating with the pump cavity.

[0018] In one embodiment, a sealing member is arranged between the pump cover and the shielding cover, and the sealing member is used for sealingly connecting the mating parts of the pump cover and the shielding cover.

[0019] In one embodiment, the shield assembly further includes a fixed shaft. One end of the fixed shaft is connected to the pump cover, and the other end is inserted into the second accommodation cavity and connected to the shield. The second rotor includes a shaft sleeve, a second rotating shaft, and a second magnetic ring that are sequentially sleeved around the fixed shaft from the inside to the outside. One end of the second rotating shaft facing the second port is connected to the pump impeller.

[0020] In one embodiment, the second rotating shaft and the pump impeller are integrally formed;

[0021] And / or, the shaft sleeve, the second rotating shaft, and the second magnetic ring are formed into an integral structure by injection molding.

[0022] The present utility model further provides a water heater, including:

[0023] A flue gas system for allowing flue gas to flow through;

[0024] A heat exchanger disposed in the flue gas system for exchanging heat with the flue gas in the flue gas system; and

[0025] A water circuit system communicated with the heat exchanger; and

[0026] The fan and water pump assembly as described above, wherein the fan assembly is communicated with the flue gas system for driving air flow to flow along the flue gas system, and the water pump assembly is communicated with the water circuit system for driving water flow to flow along the water circuit system.

[0027] The fan and water pump assembly of the technical solution of the present utility model integrates the fan function and the water pump function by sharing a set of driving devices for the fan assembly and the water pump assembly. Among them, the driving device has at least a first output end drivingly connected to the wind wheel of the fan assembly and a second output end drivingly connected to the pump wheel of the water pump assembly, and the first output end and the second output end are configured to be able to output power independently of each other. In this way, when the driving device works, the power output by the first output end is transmitted to the wind wheel to drive the wind wheel to rotate, so that the fan assembly can operate normally; the power output by the second output end is transmitted to the pump wheel to drive the pump wheel to rotate, so that the water pump assembly can operate normally. Moreover, the first output end and the second output end output power independently of each other, so that the wind wheel and the pump wheel can operate independently of each other, thus meeting different usage conditions. When the fan and water pump assembly is applied to a water heater, only one set of driving devices needs to be configured when realizing the two functions of 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 driving devices is reduced, and further 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 at one time. Compared with the traditional water heater that needs to install the fan and the water pump on the water heater body separately during assembly, this solution can simplify the installation steps, thereby improving the assembly efficiency of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0029] Figure 1 is a schematic exploded view of an embodiment of the fan and water pump assembly provided by the present utility model;

[0030] Figure 2 is a schematic cross-sectional view of an embodiment of the fan and water pump assembly provided by the present utility model;

[0031] Figure 3 is Figure 2 the cross-sectional structure diagram after omitting the wind wheel in;

[0032] Figure 4 is a schematic exploded view of an embodiment of the first rotor provided by the present utility model;

[0033] Figure 5 is a schematic structural diagram of an embodiment of the second rotor provided by the present utility model;

[0034] Figure 6 Schematic structural diagram of an embodiment of the stator assembly provided by the present utility model;

[0035] Figure 7 Schematic structural diagram of an embodiment of the shielding cover assembly provided by the present utility model;

[0036] Figure 8 is Figure 7 Schematic structural diagram of another perspective of the shielding cover in

[0037] Explanation of the reference numerals in the drawings:

[0038] 101. First output terminal; 102. Second output terminal; 11. First rotor; 111. Rotor housing; 112. First magnetic ring; 113. First rotating shaft; 12. Second rotor; 121. Sleeve; 122. Second rotating shaft; 123. Second magnetic ring; 13. Stator assembly; 131. Stator core; 132. Winding coil; 14. Shielding cover assembly; 141. Shielding cover; 1411. First accommodating cavity; 1412. Second accommodating cavity; 1413. Annular cavity; 141a. Body; 141b. Extension part; 142. Fixed shaft; 15. Bearing; 16. Wave spring; 17. First retaining ring; 18. Second retaining ring; 19. Gasket; 21. Wind wheel; 31. Pump wheel; 32. Pump cover; 40. Sealing member.

[0039] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0041] 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.

[0042] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed 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 a 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.

[0043] In the related art, some water heaters contain both a blower and a water pump, and the blower and the water pump need to be separately equipped with a set of driving devices for driving respectively. 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. This makes the cost of the water heater relatively high, and the two sets of driving devices 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 entire water heater.

[0044] 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 devices. 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.

[0045] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the blower and water pump assembly includes a driving device, a blower assembly, and a water pump assembly. The driving device has at least a first output end 101 and a second output end 102, and the first output end 101 and the second output end 102 are configured to be able to output power independently of each other; the blower assembly includes a wind wheel 21 drivingly connected to the first output end 101, and the driving device drives the wind wheel 21 to rotate via the first output end 101; the water pump assembly includes a pump wheel 31 drivingly connected to the second output end 102, and the driving device drives the pump wheel 31 to rotate via the second output end 102.

[0046] In this embodiment, the driving device is used to provide power for the fan assembly and the water pump assembly. The driving device has a first output end 101 and a second output end 102, the first output end 101 is drivingly connected to the wind wheel 21, and the second output end 102 is drivingly connected to the pump wheel 31. The first output end 101 and the second output end 102 are configured to be able to output power independently of each other, that is, the power output by the first output end 101 and the second output end 102 is independent of each other and not interfered with. For example, the first output end 101 and the second output end 102 can output the same amount of power or different amounts of power; for another example, the first output end 101 and the second output end 102 can output power simultaneously, or one of them can output power while the other does not work. When the driving device works, the power output by the first output end 101 is transmitted to the wind wheel 21 to drive the wind wheel 21 to rotate, so that the fan assembly can operate normally; the power output by the second output end 102 is transmitted to the pump wheel 31 to drive the pump wheel 31 to rotate, so that the water pump assembly can operate normally. It can be understood that the power output by the first output end 101 and the second output end 102 is independent of each other, so that the wind wheel 21 and the pump wheel 31 can operate independently of each other. For example, the wind wheel 21 and the pump wheel 31 can rotate synchronously or non-synchronously, and for another example, the rotational speeds of the wind wheel 21 and the pump wheel 31 can be the same or different. Among them, the driving device includes, but is not limited to, a double-rotor single-stator motor, a double-rotor double-stator motor, or a driving mechanism with a double output end formed by a single-rotor single-stator motor cooperating with other transmission mechanisms, etc., as long as the two output ends of the driving device can achieve independent torque output.

[0047] 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, 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 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 type 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 driving device 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 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 transport 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 type 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 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 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 driving device can play the role of increasing the water pressure and flow rate in the water circuit and realize the water pump function.

[0048] 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 driving devices for the fan assembly and the water pump assembly. Among them, the driving device has at least a first output end 101 drivingly connected to the wind wheel 21 of the fan assembly and a second output end 102 drivingly connected to the pump wheel 31 of the water pump assembly. The first output end 101 and the second output end 102 are configured to be able to output power independently of each other. In this way, when the driving device works, the power output by the first output end 101 is transmitted to the wind wheel 21 to drive the wind wheel 21 to rotate, so that the fan assembly can operate normally; the power output by the second output end 102 is transmitted to the pump wheel 31 to drive the pump wheel 31 to rotate, so that the water pump assembly can operate normally. Moreover, the first output end 101 and the second output end 102 output power independently of each other, so that the wind wheel 21 and the pump wheel 31 can operate independently of each other, thus meeting different usage conditions. When this fan and water pump assembly is applied to a water heater, only one set of driving devices needs 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 driving devices is reduced, and thus 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 at one time. Compared with the traditional water heater that needs to install the fan and the water pump on the water heater body separately during assembly, this solution can simplify the installation steps, thereby improving the assembly efficiency of the water heater.

[0049] In addition, the above-mentioned fan and water pump assembly enables the fan and the water pump to share a set of driving devices, which can cool the driving device when the water pump passes through cold water, is beneficial to reducing the temperature rise of the driving device, 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 driving devices due to the space saved in the internal installation of the water heater, enabling more installation space to be vacated inside the water heater for the installation of other expansion function modules.

[0050] As Figures 1 to 3 shown, in one embodiment, the driving device includes a dual-rotor motor and an electronic control system electrically connected to the dual-rotor motor. The dual-rotor motor includes a first rotor 11, a second rotor 12, and a stator assembly 13. The first rotor 11 defines the first output end 101, the second rotor 12 defines the second output end 102, and the stator assembly 13 and the first rotor 11 jointly define a first magnetic circuit to drive the first rotor 11 and the wind wheel 21 to rotate. The stator assembly 13 and the second rotor 12 jointly define a second magnetic circuit to drive the second rotor 12 and the pump wheel 31 to rotate.

[0051] In this embodiment, the driving device includes a dual-rotor motor and an electronic control system electrically connected to the dual-rotor motor. The two rotors of the dual-rotor motor are respectively drivingly connected to the wind wheel 21 and the pump wheel 31. In this way, only one set of electronic control system is needed to control the operation of the dual-rotor motor, and the wind wheel 21 and the pump wheel 31 can be driven to rotate by the dual-rotor motor, thereby realizing the normal operation of the fan assembly and the water pump assembly. Among them, there are various arrangements between the first rotor 11, the second rotor 12 and the stator assembly 13. For example, the first rotor 11 and the second rotor 12 can be arranged radially along the stator assembly 13, or the first rotor 11 and the second rotor 12 can be arranged axially along the stator assembly 13 and so on. The stator assembly 13 and the first rotor 11 form a first magnetic circuit through an air gap. After the coil winding of the stator assembly 13 is energized, the first rotor 11 can be driven to rotate by the magnetic field of the first magnetic circuit, and then the wind wheel 21 can be driven to rotate by the first rotor 11. The stator assembly 13 and the second rotor 12 form a second magnetic circuit through an air gap. After the coil winding of the stator assembly 13 is energized, the second rotor 12 can be driven to rotate by the magnetic field of the second magnetic circuit, and then the pump wheel 31 can be driven to rotate by the second rotor 12.

[0052] Moreover, the first rotor 11 and the second rotor 12 of the dual-rotor motor can output torque independently of each other. Only by selecting a certain pole-slot ratio between the first rotor 11 and the stator assembly 13 and between the second rotor 12 and the stator assembly 13, the wind wheel 21 and the pump wheel 31 can be operated at the same speed or different speeds by using one set of electronic control system. For example, when the pole-slot ratio of the first rotor 11 and the stator assembly 13 is different from that of the second rotor 12 and the stator assembly 13, the wind wheel 21 and the pump wheel 31 can be operated at different speeds. When the pole-slot ratios of the two are the same, the wind wheel 21 and the pump wheel 31 can be operated at the same speed. In addition, in this embodiment, the first rotor 11 and the second rotor 12 of the dual-rotor motor share a stator assembly 13. Compared with a dual-stator dual-rotor motor, one stator can be omitted, the overall structure is simpler, the cost is lower, and the volume is smaller.

[0053] As Figure 3 and Figure 6 shown, in one embodiment, the stator assembly 13 includes a stator core 131 sleeved around the second rotor 12, and a winding coil 132 wound around the stator core 131. The winding coil 132 is electrically connected to the electronic control system, and the first rotor 11 is sleeved around the stator assembly 13.

[0054] In this embodiment, the stator assembly 13 is generally arranged in a ring shape. The first rotor 11 is an outer rotor rotatably sleeved around the outer periphery of the stator assembly 13, and the second rotor 12 is an inner rotor rotatably arranged in the inner cavity of the stator assembly 13. In this way, the first rotor 11 and the second rotor 12 are arranged radially along the stator assembly 13, and the overall arrangement structure is simple, which is beneficial to reducing the axial size of the dual-rotor motor. Moreover, the first rotor 11 and the second rotor 12 are respectively located on the inner and outer sides of the stator assembly 13 and are separated by the stator assembly 13, which can prevent the first rotor 11 and the second rotor 12 from interfering with each other. The stator assembly 13 includes a stator core 131 and a winding coil 132 wound around the stator core 131. The winding coil 132 is electrically connected to the electric control system. When the winding coil 132 is energized, it can generate a magnetic field, thereby driving the first rotor 11 and the second rotor 12 to rotate. Among them, the stator core 131 may include a stator iron core and an insulating system covering the surface of the stator iron core. The insulating system can separate the coil winding from the stator iron core to avoid scratching the coil winding or the risk of short circuit. Among them, the insulating 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.

[0055] It can be understood that the stator core 131 is provided with a plurality of stator slots along the circumferential direction, and the coil winding is wound in the stator slots. Among them, the pole-slot ratio between the first rotor 11 and the stator assembly 13 is the ratio of the number of magnetic poles of the first rotor 11 to the number of stator slots, and the pole-slot ratio between the second rotor 12 and the stator assembly 13 is the ratio of the number of magnetic poles of the second rotor 12 to the number of stator slots. Considering that in actual applications, the wind wheel 21 and the pump wheel 31 generally require different speeds, optionally, the number of magnetic poles of the first rotor 11 is different from the number of magnetic poles of the second rotor 12. In this way, the pole-slot ratio between the first rotor 11 and the stator core 131 is different from the pole-slot ratio between the second rotor 12 and the stator core 131, so that the wind wheel 21 and the pump wheel 31 can operate at different speeds to meet different working conditions requirements.

[0056] As Figure 2 shown, in one embodiment, the dual-rotor motor further includes a shielding cover assembly 14. The shielding cover assembly 14 includes a shielding cover 141. The stator assembly 13 is sleeved around the outer periphery of the shielding cover 141. The first rotor 11 is sleeved around the outer periphery of the stator assembly 13 and is rotatably connected to the shielding cover 141. The second rotor 12 is rotatably installed in the shielding cover 141.

[0057] In this embodiment, the shielding cover 141 can serve as the installation carrier for the stator assembly 13, the first rotor 11, and the second rotor 12, facilitating the installation of the three components. Moreover, since the second rotor 12 needs to be connected to the pump impeller 31, a part of the water will enter the second rotor 12 when the water pump assembly is operating. By providing the shielding cover 141, the second rotor 12 can be separated from the stator assembly 13, playing a role in wet-dry isolation to prevent the water in the water pump assembly from entering the stator assembly 13 and ensuring the safety of the dual-rotor motor.

[0058] To ensure the installation stability of the stator assembly 13, optionally, the stator assembly 13 and the shielding cover 141 can be fixed by potting (such as potting epoxy resin material) or BMC injection molding.

[0059] Please refer to Figure 3 、 Figure 4 and Figure 8 For the convenience of installing the first rotor 11, in one embodiment, the shielding cover 141 is provided with a first accommodation cavity 1411 and a first port communicating with the first accommodation cavity 1411. A bearing 15 is provided in the first accommodation cavity 1411. The first rotor 11 includes a rotor housing 111, a first magnetic ring 112, and a first rotating shaft 113. The rotor housing 111 is sleeved on the periphery of the stator assembly 13. The first magnetic ring 112 is fixed on the inner peripheral surface of the rotor housing 111 and is disposed opposite to the stator assembly 13. One end of the first rotating shaft 113 is connected to the bearing 15, and the other end extends out of the first port and is connected to the rotor housing 111. The wind wheel 21 is connected to the rotor housing 111.

[0060] In this embodiment, a first magnetic circuit is formed between the first magnetic ring 112 and the stator assembly 13 through an air gap. When the dual-rotor motor is operating, the magnetic field in the first magnetic circuit drives the first magnetic ring 112 to rotate, and then drives the rotor housing 111 and the first rotating shaft 113 to rotate through the first magnetic ring 112. The wind wheel 21 of the fan assembly is fixedly connected to the rotor housing 111 of the first rotor 11, and the rotation of the rotor housing 111 can drive the wind wheel 21 to rotate. During assembly, the first magnetic ring 112 can be fixed to the inner peripheral surface of the rotor housing 111 by gluing or connecting with fasteners, etc. One end of the first rotating shaft 113 is connected to the bearing 15 in the first accommodation cavity 1411, and the other end of the first rotating shaft 113 can be connected and fixed to the rotor housing 111 by connecting with fasteners or interference fit, etc. The bearing 15 can play a role in stably supporting the first rotor 11 to ensure the stability of the rotation of the first rotor 11. The wind wheel 21 and the rotor housing 111 can be integrally formed or can be a split structure and then assembled and fixed.

[0061] Optionally, in one embodiment, the rotor housing 111 has an end plate and a side enclosure plate provided at the periphery of the end plate and extending towards one side. The side enclosure plate surrounds the periphery of the stator assembly 13. A first magnetic ring 112 is fixedly provided at a position on the inner peripheral surface of the side enclosure plate opposite to the stator assembly 13. The end plate is disposed opposite to the first port. The end plate is provided with a perforation for inserting the first rotating shaft 113, and the first rotating shaft 113 is in interference fit with the perforation. Optionally, in order to ensure the structural strength of the assembly between the first rotating shaft 113 and the perforation, the end plate is provided with a flange extending axially along the periphery of the perforation. The flange surrounds the periphery of the first rotating shaft 113 to increase the contact area of the interference fit with the first rotating shaft 113 and improve the structural strength of the rotor housing 111.

[0062] In order to further improve the rotational stability of the first rotor 11, optionally, as Figure 3 shown, in one embodiment, at least two bearings 15 arranged axially along the first rotor 11 are provided in the first accommodation cavity 1411. A first retaining ring 17 is provided between two adjacent bearings 15. A second retaining ring 18 is provided at the outer end face of the outermost bearing 15. A wave spring 16 is provided between the innermost bearing 15 and the bottom wall of the first accommodation cavity 1411. The first rotating shaft 113 is inserted into the inner rings of a plurality of bearings 15 at the same time. In this way, the plurality of bearings 15 can stably support the first rotating shaft 113, and further ensure the rotational stability of the first rotor 11. Optionally, the inner wall surface of the first accommodation cavity 1411 is provided with a first card slot for accommodating the outer edge of the first retaining ring 17. The outer peripheral surface of the first rotating shaft 113 is provided with a second card slot for accommodating the inner edge of the second retaining ring 18. In this way, the installation reliability of the bearings 15 can be further improved, and the axial displacement of the bearings 15 can be avoided.

[0063] Optionally, one end of the wind wheel 21 has a concave cavity, and at least a part of the rotor housing 111 is accommodated in the concave cavity of the wind wheel 21. In this way, the cooperation between the wind wheel 21 and the rotor housing 111 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 111 and the wind wheel 21 are assembled by stamping and form an interference fit.

[0064] In one embodiment, the wind wheel 21 and the rotor housing 111 are integrally formed. For example, the wind wheel 21 and the rotor housing 111 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 111 can be ensured, and further the stability of the operation of the wind wheel 21 can be ensured. Of course, in other embodiments, the wind wheel 21 and the rotor housing 111 can also be assembled and fixed by snap connection, threaded connection and other methods.

[0065] In one embodiment, the fan assembly further includes a volute casing, and the dual-rotor motor further includes a motor housing. The first rotor 11, the second rotor 12, and the stator assembly 13 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 11 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 realize the fan function.

[0066] As Figure 3 and Figure 7 shown, in one embodiment, the shielding cover 141 is further provided with a second accommodation cavity 1412 and a second port communicated with the second accommodation cavity 1412. The second rotor 12 is rotatably installed in the second accommodation cavity 1412. One end of the second rotor 12 extends out of the second port and is connected to the pump impeller 31. The water pump assembly further includes a pump cover 32. The pump cover 32 is disposed at one end of the shielding cover 141 where the second port is provided. The pump cover 32 and the shielding cover 141 enclose a pump cavity for accommodating the pump impeller 31. The pump cover 32 is provided with a liquid inlet and a liquid outlet that are respectively communicated with the pump cavity.

[0067] In this embodiment, the shielding cover 141 and the pump cover 32 cooperate to enclose a pump cavity for accommodating the pump impeller 31. The pump cavity is communicated with the second accommodation cavity 1412 of the shielding cover 141 through the second port. Thus, the second rotor 12 installed in the second accommodation cavity 1412 can be conveniently connected to the pump impeller 31. Such a structural design is also beneficial to designing the second rotor 12 and the pump impeller 31 as an integral structure. When the second rotor 12 rotates, it drives the pump impeller 31 to rotate, so that 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.

[0068] To ensure the sealing reliability between the shielding cover 141 and the pump cover 32, as Figure 3 shown, in one embodiment, a seal 40 is provided between the pump cover 32 and the shielding cover 141. The seal 40 is used to seal and connect the mating parts of the pump cover 32 and the shielding cover 141. Thus, it can prevent the water in the pump cavity from leaking out to the side of the stator assembly 13 from the mating part of the pump cover 32 and the shielding cover 141, so as to ensure the safety of the dual-rotor motor.

[0069] Optionally, in one embodiment, the shielding cover 141 is provided with a positioning groove at one end close to the second port for accommodating the open end of the pump cover 32. The positioning groove has a first positioning surface that abuts against the end surface of the pump cover 32 and a second positioning surface that abuts against the inner peripheral surface of the pump cover 32. The inner peripheral surface of the pump cover 32 and the second positioning surface are sealed and connected through the seal 40. Among them, the seal 40 includes but is not limited to using a sealing ring, sealant, etc. Optionally, the inner peripheral surface of the pump cover 32 is provided with a sealing groove, and the seal 40 is accommodated in the sealing groove.

[0070] Please refer to Figure 3 and Figure 5 In order to facilitate the installation of the second rotor 12, in one embodiment, the shield assembly 14 further includes a fixed shaft 142. One end of the fixed shaft 142 is connected to the pump cover 32, and the other end is inserted into the second accommodation cavity 1412 and connected to the shield 141. The second rotor 12 includes a sleeve 121, a second rotating shaft 122, and a second magnetic ring 123 that are sequentially sleeved around the fixed shaft 142 from the inside out. One end of the second rotating shaft 122 facing the second port is connected to the pump impeller 31.

[0071] In this embodiment, the fixed shaft 142 remains fixed relative to the shield 141 and the pump cover 32. The sleeve 121 is rotatably sleeved around the fixed shaft 142. The second rotating shaft 122 is fixed to the outer periphery of the sleeve 121, and the second magnetic ring 123 is fixed to the outer periphery of the second rotating shaft 122. A second magnetic circuit is formed between the second magnetic ring 123 and the stator assembly 13 through an air gap. When the dual-rotor motor operates, the magnetic field in the second magnetic circuit drives the second magnetic ring 123 to rotate, and then drives the second rotating shaft 122 to rotate through the second magnetic ring 123, and drives the pump impeller 31 to rotate through the second rotating shaft 122, thereby realizing the water pump function.

[0072] To facilitate the installation of the fixed shaft 142, optionally, the shield 141 and the pump cover 32 are correspondingly provided with insertion holes for the end portion of the fixed shaft 142 to be inserted. The fixed shaft 142 is in interference fit with the insertion holes to ensure the installation stability of the fixed shaft 142.

[0073] In one embodiment, the second rotating shaft 122 and the pump impeller 31 are integrally formed. For example, the second rotating shaft 122 and the pump impeller 31 can be integrally injection molded by injection molding. In this way, the installation structure of the pump impeller 31 can be simplified, and the connection reliability between the pump impeller 31 and the second rotating shaft 122 can be ensured, thereby ensuring the stability of the operation of the pump impeller 31. Of course, in other embodiments, the pump impeller 31 and the second rotating shaft 122 can also be assembled and fixed by means of snap connection, threaded connection, etc. It should be noted that when the pump impeller 31 is composed of multiple parts, the second rotating shaft 122 can be integrally formed with one part of the pump impeller 31. For example, the pump impeller 31 can include a first disk body and a second bypass that are opposite and spaced apart, and blades provided between the first disk body and the second disk body. Among them, the second rotating shaft 122 can be integrally formed with the first disk body.

[0074] To ensure the stability of the overall structure of the second rotor 12, optionally, the sleeve 121, the second rotating shaft 122, and the second magnetic ring 123 are injection molded into an integral structure. It can be understood that when the materials of the sleeve 121, the second rotating shaft 122, and the second magnetic ring 123 are different, they can be injection molded into one body by insert injection molding.

[0075] Optionally, the fixed shaft 142 is made of a ceramic shaft. In this way, the fixed shaft 142 has good wear resistance and corrosion resistance, and the water in the pump chamber entering the second accommodation chamber 1412 of the shield 141 can also lubricate the fixed shaft 142 to ensure the rotational stability of the second rotor 12.

[0076] Optionally, the shaft sleeve 121 is made of a graphite shaft sleeve 121. In this way, the shaft sleeve 121 has good wear resistance and corrosion resistance, and the water in the pump chamber entering the second accommodation chamber 1412 of the shield 141 can also lubricate the shaft sleeve 121 to ensure the rotational stability of the second rotor 12.

[0077] To prevent the shaft sleeve 121 from sliding axially along the fixed shaft 142, optionally, two gaskets 19 are provided at intervals along the axial direction of the fixed shaft 142. The shaft sleeve 121 is located between the two gaskets 19, and the axial movement of the shaft sleeve 121 is restricted by the two gaskets 19.

[0078] Optionally, as Figure 3 、 Figure 7 and Figure 8 shown, in an embodiment, the shield 141 includes a main body 141a and an extension part 141b. The main body 141a is provided with a first accommodation chamber 1411 and a second accommodation chamber 1412. The extension part 141b is provided on the outer periphery of the second port. An annular chamber 1413 is formed between the extension part 141b and the outer peripheral surface of the main body 141a. The stator assembly 13 is sleeved on the periphery of the main body 141a, and one end of the stator assembly 13 close to the second port is accommodated in the annular chamber 1413. The extension part 141b and the pump cover 32 jointly enclose the pump chamber.

[0079] In this embodiment, the first accommodation cavity 1411 and the second accommodation cavity 1412 are arranged at intervals along the axial direction of the main body 141a. The first port and the second port are respectively provided at both axial ends of the main body 141a. The extension part 141b includes 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 main body 141a forms an annular cavity 1413. After the stator assembly 13 is sleeved on the outer periphery of the main body 141a, one end of the stator assembly 13 can be accommodated in the annular cavity 1413 to position the stator, and the stator assembly 13 and the shielding cover 141 can also be fixed by potting in the annular cavity 1413. In order to ensure that there is a certain interval between the end face of the stator assembly 13 and the bottom wall of the annular cavity 1413, optionally, a positioning step for abutting and cooperating with the end face of the stator assembly 13 is provided at one end of the inner peripheral wall of the annular cavity 1413 facing the first port. The open end of the pump cover 32 abuts and cooperates with the extension part 141b of the shielding cover 141, so as to enclose a pump cavity for accommodating the pump impeller 31 between the pump cover 32 and the extension part 141b. Optionally, a positioning groove for accommodating the open end of the pump cover 32 is provided at the joint of the first folded edge and the second folded edge of the extension part 141b.

[0080] The present utility model also provides a water heater, which includes a flue gas system, a heat exchanger, a water circuit system and a fan and water pump assembly. The flue gas system is used for the flow of flue gas; the heat exchanger is arranged in the flue gas system and is used for exchanging heat with the flue gas in the flue gas system; the water circuit system is communicated with the heat exchanger; the fan and water pump assembly includes a driving device, a fan assembly and a water pump assembly. The driving device has at least a first output end 101 and a second output end 102, and the first output end 101 and the second output end 102 are configured to be able to output power independently of each other; the fan assembly includes a wind wheel 21 drivingly connected to the first output end 101, and the driving device drives the wind wheel 21 to rotate via the first output end 101; the water pump assembly includes a pump impeller 31 drivingly connected to the second output end 102, and the driving device drives the pump impeller 31 to rotate via the second output end 102. The fan assembly is communicated with the flue gas system and is used for driving the air flow to flow along the flue gas system, and the water pump assembly is communicated with the water circuit system and is used for driving the water flow to flow along the water circuit system. The specific structure of the fan and water pump assembly refers to the above embodiment. Since this water heater adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the water heater includes but is not limited to gas water heaters, wall-hung boilers, etc. Gas water heaters include but are not limited to forced-draft gas water heaters, forced-exhaust gas water heaters, etc.

[0081] 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, a flue gas flow path between the burner and the smoke collecting hood constitutes a flue gas system, and the water inlet pipe is communicated with the water outlet pipe via the heat exchanger to constitute a water path system. The fan assembly can be connected to the inlet end of the flue gas system or the outlet end of the flue gas 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 type 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 gas system). At this time, the fan assembly driven by the driving device can realize the function of a forced draft fan. 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 transport air into the burner to supplement the secondary air required for combustion for the burner. Another example is that when the fan and water pump assembly is applied to a forced exhaust type 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 gas 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 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 to the water path system, and the water pump assembly driven by the driving device can play a role in increasing the pressure and flow rate of the water path and realize the function of the water pump.

[0082] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A fan water pump assembly, characterized in that: include: A driving device, the driving device having at least a first output end and a second output end, wherein the first output end and the second output end are configured to be able to output power independently of each other; A fan assembly, the fan assembly comprising a wind wheel drivingly connected to the first output end, the driving device driving the wind wheel to rotate via the first output end; as well as A water pump assembly comprises a pump wheel drivingly connected to the second output end, and the driving device drives the pump wheel to rotate via the second output end.

2. The fan water pump assembly according to claim 1, characterized in that: The driving device includes a dual-rotor motor and an electric control system electrically connected to the dual-rotor motor, wherein the dual-rotor motor includes: a first rotor, wherein the first rotor forms the first output end; a second rotor, the second rotor configuring the second output end; and A stator assembly, wherein the stator assembly and the first rotor together form a first magnetic circuit to drive the first rotor and the wind wheel to rotate, and the stator assembly and the second rotor together form a second magnetic circuit to drive the second rotor and the pump wheel to rotate.

3. The fan water pump assembly according to claim 2, characterized in that: The stator assembly includes a stator core sleeved on the periphery of the second rotor, and a winding coil wound on the stator core, the winding coil is electrically connected to the electric control system, and the first rotor is sleeved on the periphery of the stator assembly.

4. The fan water pump assembly according to claim 3, characterized in that: The stator core is provided with a plurality of stator slots along the circumferential direction, the winding coils are wound in the plurality of stator slots, the number of magnetic poles of the first rotor is different from the number of magnetic poles of the second rotor, so that the pole-slot ratio of the first rotor to the stator core is different from the pole-slot ratio of the second rotor to the stator core.

5. The fan water pump assembly according to claim 3, characterized in that: The dual-rotor motor also includes a shielding cover assembly, which includes a 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 and is rotatably connected to the shielding cover. The second rotor is rotatably installed in the shielding cover.

6. The fan water pump assembly according to claim 5, characterized in that: The shielding cover is provided with a first accommodating chamber and a first port communicated with the first accommodating chamber, a bearing is provided in the first accommodating chamber, the first rotor comprises a rotor shell, a first magnetic ring and a first rotating shaft, the rotor shell is sleeved on the periphery of the stator assembly, the first magnetic ring is fixed on the inner circumference of the rotor shell and arranged opposite to the stator assembly, one end of the first rotating shaft is connected to the bearing, and the other end extends out of the first port and is connected to the rotor shell, and the wind wheel is connected to the rotor shell.

7. The fan water pump assembly according to claim 6, characterized in that: The wind wheel and the rotor shell are integrally formed.

8. The fan water pump assembly according to any one of claims 5 to 7, characterized in that: The shielding cover is also provided with a second accommodating chamber and a second port connected to the second accommodating chamber, the second rotor is rotatably installed in the second accommodating chamber, one end of the second rotor extends out of the second port and is connected to the pump wheel, the water pump assembly also includes a pump cover, the pump cover is provided at one end of the shielding cover provided with the second port, the pump cover and the shielding cover surround 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.

9. The fan water pump assembly according to claim 8, characterized in that: A sealing member is provided between the pump cover and the shielding cover, and the sealing member is used for sealingly connecting the matching parts of the pump cover and the shielding cover.

10. The fan water pump assembly according to claim 8, characterized in that: The shielding cover assembly also includes a fixed shaft, one end of which is connected to the pump cover, and the other end is inserted into the second accommodating cavity and connected to the shielding cover. The second rotor includes a sleeve, a second rotating shaft and a second magnetic ring which are sequentially sleeved on the periphery of the fixed shaft from the inside to the outside, and the second rotating shaft is connected to the pump wheel at one end facing the second port.

11. The fan water pump assembly according to claim 10, characterized in that: The second rotating shaft and the pump wheel are integrally formed; And / or, the shaft sleeve, the second rotating shaft, and the second magnetic ring are formed into an integrated structure by injection molding.

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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