Fan assembly and gas water heater

Abstract

The utility model discloses a fan assembly and a gas water heater, the fan assembly comprises a fan shell, a fan cover, a fan cover, a fan cover and a fan cover, the fan shell is provided with a volute air duct; the impeller device is rotatably arranged in the volute air duct; the motor shell is connected with the fan shell, and the motor shell is provided with a mounting cavity; the motor device is arranged in the mounting cavity and comprises a motor stator and a motor rotor, the motor rotor is in running fit with the motor stator, the motor stator is connected with the motor shell and is relatively static, and the motor rotor is in transmission connection with the impeller device. According to the draught fan assembly, the motor shell is connected with the draught fan shell, the structure of the draught fan assembly can be simplified, manufacturing and production of the draught fan assembly are facilitated, in addition, the motor rotor is connected with the impeller device, the motor stator can be used for driving the motor rotor to rotate, and the impeller device can be used for driving the motor rotor to rotate. Therefore, the impeller device is driven by the motor rotor to rotate, and air flow is driven.

Description

Technical Field

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

[0002] A fan is usually installed in a gas water heater. The fan is used to discharge the waste gas and waste heat generated during the use of the water heater, so as to reduce the influence of the waste gas and waste heat on the normal operation of the water heater. In the gas water heater of the related art, the motor is installed on the fan housing, and the installation process is complex, which affects the installation efficiency. Summary of the Utility Model

[0003] An object of the utility model is to provide a fan assembly and a gas water heater.

[0004] The fan assembly according to an embodiment of the utility model includes: a fan housing provided with a volute air duct; an impeller device rotatably arranged in the volute air duct; a motor housing connected to the fan housing, the motor housing being provided with an installation cavity; a motor device arranged in the installation cavity, the motor device including a motor stator and a motor rotor, the motor rotor being rotationally matched with the motor stator, the motor stator being connected to the motor housing and relatively stationary, and the motor rotor being drivingly connected to the impeller device.

[0005] For the fan assembly according to an embodiment of the utility model, connecting the motor housing and the fan housing can simplify the structure of the fan assembly, facilitate the manufacture and production of the fan assembly, etc. In addition, connecting the motor rotor and the impeller device can drive the motor rotor to rotate by using the motor stator, and then drive the impeller device to rotate by using the motor rotor to realize the driving of the air flow.

[0006] In addition, the fan assembly according to the above embodiment of the utility model may further have the following additional technical features:

[0007] In some embodiments, at least a part of the motor housing is integrally formed with the fan housing.

[0008] In some embodiments, the fan housing includes a first housing and a second housing, the first housing and the second housing are connected along the axis direction of the impeller device, and the volute air duct is constructed, and the motor housing is integrally formed with the first housing;

[0009] Alternatively, the blower housing includes a third housing and a fourth housing, the third housing and the fourth housing are connected along the radial direction of the impeller device, and the volute air duct is constructed. The motor housing is integrally formed with the third housing, integrally formed with the fourth housing, or a part of the motor housing is integrally formed with the third housing and another part is integrally formed with the fourth housing.

[0010] In some embodiments, at least a part of the motor housing is integrally injection-molded with the blower housing.

[0011] In some embodiments, the blower housing is configured as a high-temperature resistant housing; or, the motor housing is configured as a high-temperature resistant housing.

[0012] In some embodiments, the blower housing is configured as a plastic housing, a resin housing, and / or a BMC housing; or, the motor housing is configured as a plastic housing, a resin housing, and / or a BMC housing.

[0013] In some embodiments, the blower housing has opposite first and second ends.

[0014] Wherein, the first end of the blower housing extends into the volute air duct and the second end is connected to the end plate of the volute air duct; or, the first end of the blower housing is connected to the end plate of the volute air duct and the second end extends into the volute air duct.

[0015] In some embodiments, the blower housing penetrates through the end plate of the volute air duct. The blower housing has a first part extending into the volute air duct and a second part extending out of the volute air duct. The ratio of the first part to the second part is greater than 1 / 4 and less than or equal to 4.

[0016] In some embodiments, the volute air duct is provided with a first end plate and a second end plate opposite to each other along the axial direction. The motor housing is disposed on the first end plate, and the inlet of the volute air duct is disposed on the second end plate of the motor housing.

[0017] In some embodiments, the motor housing is configured as a cylindrical shape extending along the axis of the impeller device. Wherein, one end of the motor housing along the axis is open or provided with a first end cover, or the other end of the motor housing is open or provided with a second end cover.

[0018] In some embodiments, the first end cover is integrally formed with the motor housing; or, the second end cover is integrally formed with the motor housing.

[0019] In some embodiments, the motor stator and the motor housing are configured as an integral structure; and / or, the motor housing is injection-molded and wraps the motor stator.

[0020] In some embodiments, the fan assembly is further provided with an air inlet duct, and the air inlet duct is communicated with the volute duct.

[0021] In some embodiments, the fan housing includes a first housing and a second housing, the first housing and the second housing are connected along the axial direction of the impeller device, and the volute duct is constructed, and the air inlet duct is arranged in the first housing;

[0022] Alternatively, the fan housing includes a third housing and a fourth housing, the third housing and the fourth housing are connected along the radial direction of the impeller device, and the volute duct and the air inlet duct are constructed.

[0023] The gas water heater according to an embodiment of the present invention includes: the aforementioned fan assembly; a combustion chamber, the combustion chamber is connected to the fan assembly and communicated with the inlet of the volute duct.

[0024] In some embodiments, the fan housing includes a smoke collecting hood, an air inlet duct is constructed in the smoke collecting hood, the air inlet duct is communicated with the volute duct, and the air inlet duct covers the upper part of the combustion chamber. Description of the Drawings

[0025] Figure 1 is a schematic diagram of a fan assembly according to an embodiment of the present invention in one direction.

[0026] Figure 2 is a schematic diagram of a fan assembly according to an embodiment of the present invention in another direction.

[0027] Figure 3 is a cross-sectional view of a fan assembly according to an embodiment of the present invention.

[0028] Figure 4 is a cross-sectional view of the mating structure of the fan housing and the motor housing of a fan assembly according to an embodiment of the present invention.

[0029] Figure 5 is a cross-sectional view of the mating structure of the fan housing and the motor housing of a fan assembly according to another embodiment of the present invention.

[0030] Figure 6 is a cross-sectional view of the mating structure of the fan housing and the motor housing of a fan assembly according to still another embodiment of the present invention.

[0031] Figure 7 is a schematic diagram of a fan assembly according to another embodiment of the present invention.

[0032] Figure 8 is a schematic diagram of a fan assembly according to still another embodiment of the present invention.

[0033] Reference Numerals:

[0034] The fan assembly 100 includes a fan housing 10, a volute air duct 101, a volute inlet 1011, a volute outlet 1012, an air inlet duct 102, an air outlet duct 103, a transition section 1031, an air outlet section 1032, a first housing 111, a first side plate 1111, a first end plate 1112, a second housing 112, a second side plate 1121, a second end plate 1122, a flanging 1123, a third side plate 1124, a third housing 113, a fourth housing 114, a motor housing 20, a first end cover 21, a second end cover 22, a cylindrical body portion 23, an impeller device 30, a motor device 40, a motor stator 41, and a motor rotor 42. Specific embodiments

[0035] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] As Figures 1 to 8 , the fan assembly 100 according to an embodiment of the present invention includes: a fan housing 10 and an impeller device 30. The fan housing 10 is provided with a volute air duct 101, and a volute inlet 1011 and a volute outlet 1012 are provided. The volute air duct 101 is disposed between the volute inlet 1011 and the volute outlet 1012. The impeller device 30 is disposed in the volute air duct 101, and the impeller device 30 is rotatable and can drive the air flow to flow from the volute inlet 1011 to the volute outlet 1012 by rotation, so as to realize the driving of the air flow.

[0037] The fan assembly 100 further includes a motor housing 20 and a motor device 40. The motor housing 20 is connected to the fan housing 10. The motor housing 20 is provided with an installation cavity. The motor device 40 is disposed in the installation cavity. The motor device 40 includes a motor stator 41 and a motor rotor 42. The motor rotor 42 is rotationally matched with the motor stator 41. The motor stator 41 is connected to the motor housing 20 and is relatively stationary. The motor rotor 42 is drivingly connected to the impeller device 30.

[0038] For the fan assembly 100 according to an embodiment of the present invention, connecting the motor housing 20 to the fan housing 10 can simplify the structure of the fan assembly 100, facilitate the manufacture and production of the fan assembly 100, etc. In addition, connecting the motor rotor 42 to the impeller device 30 can drive the motor rotor 42 to rotate by using the motor stator 41, and then drive the impeller device 30 to rotate by using the motor rotor 42, so as to realize the driving of the air flow.

[0039] Optionally, referring to the attached Figure 1 and Figure 2, the fan assembly 100 of the present utility model can have front-back direction, up-down direction and left-right direction that are perpendicular to each other. Among them, the fan assembly 100 has an air inlet duct 102, a volute duct 101 and an air outlet duct 103. The air inlet duct 102 and the air outlet duct 103 communicate with the volute duct 101. Airflow can enter the volute duct 101 through the air inlet duct 102, and after passing through the volute duct 101, it is sent out from the air outlet duct 103. Among them, one end plate of the volute duct 101 along the axial direction is provided with a volute inlet 1011 and the peripheral wall is provided with a volute outlet 1012. The air inlet duct 102 communicates with the volute inlet 1011, and the air outlet duct 103 communicates with the volute outlet 1012. Of course, in the present utility model, the orientation is mainly described according to the drawings, which is not a limitation on the protection scope of the present utility model. The technical solutions obtained after adjusting the direction according to the solution of the present utility model are still within the protection scope of the present utility model. For example, swapping the left-right direction in the drawings, etc.

[0040] Combined with the attached Figure 1 and Figure 2 , the axis of the volute duct 101 is configured to be inclined in the direction from the lower left to the upper right. The inlet axis of the air inlet duct 102 is parallel to the up-down direction, and the outlet axis of the air outlet duct 103 is parallel to the up-down direction. Among them, airflow can enter the air inlet duct 102 through the inlet of the air inlet duct 102 in the direction from bottom to top; under the guiding or collecting action of the air inlet duct 102, it enters the volute duct 101 through the volute inlet 1011; then it enters the air outlet duct 103 through the volute outlet 1012 of the volute duct 101, and finally is sent out from the outlet of the air outlet duct 103. The whole process is smooth and the air resistance is small, which can effectively improve the energy efficiency of the fan assembly 100.

[0041] Optionally, the air outlet duct 103 is inclined in the direction away from the volute duct 101 and towards the direction away from the air inlet duct 102. Further, as Figures 3 to 6 , the air outlet duct 103 has a transition section 1021 and an air outlet section 1022. The air outlet section 1022 is inclined in the direction away from the volute duct 101 and towards the direction away from the volute inlet. One end of the transition section 1021 is connected to the volute duct 101 and communicates with the volute outlet 1012, and the other end is connected to the air outlet section 1022. Among them, the axis of one end of the transition section 1021 is generally parallel to the axis of the volute outlet 1012, and the axis of the other end is generally parallel to the axis of the air outlet section 1022.

[0042] Optionally, a flanging 1123 is provided at the periphery of the volute inlet 1011. The flanging 1123 is configured to extend obliquely along the direction from the air inlet duct 102 to the volute duct 101, which can facilitate the connection between the air inlet duct 102 and the volute duct 101, and connect the volute duct 101 with the air inlet duct 102 through this inlet to facilitate smoke exhaust. In addition, the flanging 1123 can form a flow guiding structure to guide the flue gas, further reducing the wind resistance at the volute inlet 1011 and further gathering the flue gas to facilitate smoke exhaust. Among them, the flanging 1123 cooperates to form an annular shape extending along the periphery of the volute inlet 1011.

[0043] Such as Figures 3 to 6 , in some embodiments, at least a part of the motor housing 20 is integrally formed with the fan housing 10. Through the integrally formed structure, the connection strength between the motor housing 20 and the fan housing 10 can be improved, and the structure of the fan assembly 100 can be simplified. In addition, the structure and stability of the fan assembly 100 can also be simplified. For example, the motor housing 20 can be integrally formed with the fan housing 10; or a part of the motor housing 20 can be integrally formed with the fan housing 10; or a part of the motor housing 20 can be integrally formed with a part of the fan housing 10, etc. The structural forms of the motor housing 20 and the fan housing 10 of the present utility model can include but are not limited to the following embodiments.

[0044] Embodiment 1, such as Figures 3 to 6 , the fan housing 10 includes a first housing 111 and a second housing 112. The first housing 111 and the second housing 112 are connected along the axial direction of the impeller device 30 and construct the volute duct 101.

[0045] For example, the fan housing 10 is further provided with an air inlet duct 102 and an air outlet duct 103. The air inlet duct 102 is provided on the second housing 112, the volute duct 101 is provided between the first housing 111 and the second housing 112, and the air outlet duct 103 can also be provided between the first housing 111 and the second housing 112. Optionally, the first housing 111 can include a first side plate 1111 and a first end plate 1112. The first side plate 1111 can be configured as a cylinder, and the first end plate 1112 is connected to one side edge of the first side plate 1111; the second housing 112 can include a second side plate 1121 and a second end plate 1122. The second side plate 1121 can be configured as a cylinder, and the second end plate 1122 is connected to one side edge of the second side plate 1121. The other side edge of the first side plate 1111 and the other side edge of the second side plate 1121 are connected to construct the volute duct 101. The above-mentioned way of constructing the volute duct 101 is only some implementation ways of the present utility model, and is not a limitation on the protection scope of the present utility model. In the present utility model, it can also be set in other forms, such as not setting the first side plate 1111; or not setting the second side plate 1121, etc.

[0046] In addition, the second end plate 1122 may be provided with a volute inlet 1011. The second housing 112 may further include a third side plate 1124, which is configured as a smoke collecting hood. An air inlet duct 102 is formed inside the smoke collecting hood. The third side plate 1124 may be connected to the second end plate 1122. The third side plate 1124 may be cylindrical, square cylindrical, triangular cylindrical or of other shapes. During the assembly process of the fan assembly 100, the impeller can be installed in the volute air duct 101. The volute air duct 101 is formed by splicing the first housing 111 and the second housing 112, which facilitates the installation of the impeller. Moreover, the cooperation between the first end plate 1112 and the second end plate 1122 can be utilized to support the impeller. With this arrangement, the installation efficiency of the impeller can be improved.

[0047] Wherein, a connecting member is connected between the first housing 111 and the second housing 112. Specifically, the connecting member may be a bolt. In other embodiments, the connecting member may also be a wire for connection or the like. In addition, the first housing 111 and the second housing 112 may also be connected by gluing. The first housing 111 and the second housing 112 can be connected in a glued form. The above connection method is relatively simple and convenient to operate.

[0048] The aforementioned first housing 111 may be integrally formed, and the second housing 112 may also be integrally formed.

[0049] The motor housing 20 and the second housing 112 may be integrally formed. By integral forming, the processing efficiency of the fan assembly 100 can be improved, the processing costs of the first housing 111 and the motor housing 20 can be reduced, and moreover, higher structural strength and sealing effect of the first housing 111 and the motor housing 20 can be ensured, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the second housing 112 may also be configured to be integrally formed. When both the first housing 111 and the second housing 112 are integrally formed structures, the service life and energy efficiency of the fan assembly 100 can be further improved.

[0050] Wherein, the motor housing 20 may have opposite first and second ends. For example, Figure 6 , the first end of the motor housing 20 can be extended into the inner side of the second housing 112 and the second end is connected to the second housing 112; for example, Figure 4 , the first end of the motor housing 20 can also be connected to the second housing 112 and the second end extends to the outer side of the second housing 112; for example, Figure 5 , the motor housing 20 may also pass through the second housing 112. The motor housing 20 has a first part extending into the inner side of the second housing 112 and a second part extending out to the outer side of the second housing 112.

[0051] In addition, the motor stator 41 of the present utility model can also be configured as an integral structure with the motor housing 20. Optionally, the second housing 112, the motor housing 20, and the motor stator 41 are integrally formed.

[0052] Embodiment 2

[0053] As Figure 7 and Figure 8 , the fan housing 10 includes a third housing 113 and a fourth housing 114. The third housing 113 and the fourth housing 114 are connected along the radial direction of the impeller device 30 and construct a volute air duct 101.

[0054] As Figure 7 , in some examples, the third housing 113 and the fourth housing 114 are joined in the front-rear direction, and an air inlet duct 102, a volute air duct 101, and an air outlet duct 103 are constructed between the third housing 113 and the fourth housing 114. Through the connection of the third housing 113 and the fourth housing 114, the air inlet duct 102 and the volute air duct 101 are formed, which can facilitate the molding of the third housing 113 and the fourth housing 114. For example, the third housing 113 may include a first air duct shell and a second air duct shell, and the fourth housing 114 may include a third air duct shell and a fourth air duct shell. Among them, the first air duct shell and the second air duct shell are connected, and the third air duct shell and the fourth air duct shell are connected. The first air duct shell and the third air duct shell are joined in the front-rear direction, and the first air duct shell and the third air duct shell are configured as a smoke collecting hood, and an air inlet duct 102 is constructed in the smoke collecting hood, and the first air duct shell and the second air duct shell are respectively half of the smoke collecting hood; the second air duct shell and the fourth air duct shell are joined in the front-rear direction, and the second air duct shell and the fourth air duct shell are configured as a volute, and a volute air duct 101 is constructed in the volute, and the volute and the second air duct shell are respectively half of the second air duct body.

[0055] In some embodiments of the present utility model, the third housing 113 is configured to be integrally formed. By integrally forming, the processing efficiency of the third housing 113 can be improved, the processing cost of the third housing 113 can be reduced, and it can also ensure that the third housing 113 has higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the fourth housing 114 can also be configured to be integrally formed. When both the third housing 113 and the fourth housing 114 are integrally formed structures, the service life and energy efficiency of the fan assembly 100 can be further improved, and problems such as stress concentration at the connection between the third housing 113 and the fourth housing 114 caused by thermal expansion and contraction of the third housing 113 and the fourth housing 114 can be avoided.

[0056] At least one of the third housing 113 and the fourth housing 114 in the present utility model can be set as a plastic housing, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. Additionally, in combination with the foregoing, in the present utility model, the air duct structure is constructed by connecting the third housing 113 and the fourth housing 114 in the front-rear direction, which can simplify the structures of the third housing 113 and the fourth housing 114, facilitate plastic molding of the third housing 113 and the fourth housing 114, thereby effectively reducing the cost of the fan assembly 100 and improving the molding efficiency of the fan assembly 100.

[0057] Among them, the first housing and the second housing in the present utility model can be made of heat-resistant materials and can be installed in the special environment of the water heater. For example, the third housing 113 and the fourth housing 114 can be respectively formed by die-casting through injection molding. After molding, the third housing 113 and the fourth housing 114 are connected together, that is, the original multiple sheet metals are simplified into a housing composed of two components, which simplifies the process flow and reduces the processing cost.

[0058] In addition, at least one of the third housing 113 and the fourth housing 114 in the present utility model can be configured as a BMC housing. BMC is essentially a molding intermediate material for manufacturing glass fiber-reinforced thermosetting products by a semi-dry method. It can be molded and injection-molded, and its heat resistance is better than that of general engineering plastics. Its heat distortion temperature HDT is up to degrees Celsius. Therefore, when the housing made of BMC material is installed in the water heater, it will not melt due to overheating.

[0059] In addition, at least one of the third housing 113 and the fourth housing 114 can also be made of metal material.

[0060] In addition, a connecting member is connected between the third housing 113 and the fourth housing 114. Specifically, the connecting member can be a bolt. In other embodiments, the connecting member can also be a wire for connection, etc. By adding a connecting member on the third housing 113 and the fourth housing 114, the connection between the third housing 113 and the fourth housing 114 is more stable, strengthening the connection stability between the third housing 113 and the fourth housing 114, and then the sealing effect of the connection between the third housing 113 and the fourth housing 114 is better. The third housing 113 and the fourth housing 114 can also be connected by gluing.

[0061] Such as Figure 8 , in some other examples, the first housing 111 and the second housing 112 are butted in the left-right direction.

[0062] In the foregoing example, the fan housing 10 is divided into a third housing 113 and a fourth housing 114. The motor housing 20 can be integrally formed with the third housing 113, or the motor housing 20 can be integrally formed with the fourth housing 114. Among them, a shaft hole can be constructed between the third housing 113 and the fourth housing 114 for the rotating shaft of the motor device 40 to pass through and extend into the volute air duct 101 to communicate with the impeller device 30; alternatively, the shaft hole can be provided on one of the third housing 113 and the fourth housing 114. The foregoing third housing 113 can be integrally formed, and the fourth housing 114 can also be integrally formed.

[0063] In addition, a part of the motor housing 20 can be integrally formed with the third housing 113, and another part can be integrally formed with the fourth housing 114. That is to say, the motor housing 20 is divided into a first half and a second half. The first half is integrally formed with the third housing 113, and the second half is integrally formed with the fourth housing 114. When the third housing 113 and the fourth housing 114 are connected to construct the volute air duct 101, the first half and the second half are connected to form the motor housing 20. The first half can be provided in a semi-circular arc shape, and the second half can be provided in a semi-circular arc shape. Through integral forming, the processing efficiency of the fan assembly 100 can be improved, the processing costs of the third housing 113 and the motor housing 20 can be reduced, and the third housing 113 and the motor housing 20 can also be ensured to have higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the fourth housing 114 can also be configured to be integrally formed. When the third housing 113 and the fourth housing 114 are both integrally formed structures, the service life and energy efficiency of the fan assembly 100 can be further improved, and problems such as stress concentration at the connection between the third housing 113 and the fourth housing 114 caused by thermal expansion and contraction of the third housing 113 and the fourth housing 114 can be avoided.

[0064] Among them, taking the example of the motor housing 20 being integrally formed with the third housing 113, the motor housing 20 can have opposite first and second ends. The first end of the motor housing 20 can extend into the inner side of the third housing 113 and the second end is connected to the third housing 113; alternatively, the first end of the motor housing 20 can be connected to the third housing 113 and the second end extends to the outer side of the third housing 113; the motor housing 20 can also pass through the third housing 113, and the motor housing 20 has a first part extending into the inner side of the third housing 113 and a second part extending to the outer side of the third housing 113.

[0065] In addition, the motor stator 41 of the present utility model can also be constructed into an integral structure with the motor housing 20.

[0066] Optionally, the third housing 113 further includes a fourth side plate, and the fourth housing further includes a fifth side plate. The fifth side plate and the fourth side plate are connected to construct the air outlet duct 103.

[0067] In some embodiments, the integral molding in the foregoing embodiments may be integral plastic molding, such as integral injection molding, integral thermoforming, etc. For example, at least a part of the motor housing 20 in the present utility model and the blower housing 10 are integrally plastic molded. For example, at least a part of the motor housing 20 and the blower housing 10 are integrally injection molded, integrally thermoformed, etc. By integrally molding plastic parts, the molding of the motor housing 20 and the blower housing 10 can be simplified, the production and assembly of the blower assembly 100 can be simplified, the production cost can be reduced and the efficiency can be improved. Moreover, the sealing effect between the motor housing 20 and the blower housing 10 can also be optimized, and the possibility of external water, dust and other impurities contacting the motor device 40 can be reduced, thereby improving the stability and service life of the blower assembly 100.

[0068] In some embodiments, the blower housing 10 is configured as a high-temperature resistant housing; or, the motor housing 20 is configured as a high-temperature resistant housing. It can be installed in the special environment of a water heater.

[0069] In addition, at least one of the blower housing 10 and the motor housing 20 can also be set as a plastic housing, which can further improve the processing efficiency of the blower assembly 100 and reduce the cost of the blower assembly 100.

[0070] At least one of the blower housing 10 and the motor housing 20 can also be a BMC housing. BMC is essentially a molding intermediate material for manufacturing glass fiber reinforced thermosetting products by a semi-dry method. It can be molded and injection molded, and its heat resistance is better than that of general engineering plastics. Its heat distortion temperature HDT is up to degrees Celsius. Therefore, the housing made of BMC material will not melt due to overheating when installed in a water heater.

[0071] Of course, the blower housing 10 and the motor housing 20 of the present utility model can also be set as other forms of housings. For example, at least one of the blower housing 10 and the motor housing 20 can also be set as a resin housing. In addition, the two integrally molded components can be of the same material or different materials.

[0072] Such as Figure 6 , in some embodiments, the motor housing 20 has opposite first and second ends. The first end of the motor housing 20 can be extended into the volute air duct 101 and the second end is connected to the end plate of the volute air duct 101, so that the size of the blower assembly 100 can be reduced, which is beneficial to the miniaturization of the blower assembly 100 and the water heater having the blower assembly 100, etc. Moreover, it can also facilitate the formation of a flow guiding structure for the air flow from the volute inlet 1011 to the volute outlet 1012, effectively improving the stability of the blower assembly 100 and reducing the turbulence.

[0073] In addition, such as Figure 4, the first end of the motor housing 20 can also be connected to the end plate of the volute air duct 101 and the second end extends into the volute air duct 101. This can reduce the influence of the motor housing 20 on the internal space of the volute air duct 101, optimize the air flow rate, reduce the wind resistance, and thus improve the smoke exhaust effect of the water heater with the blower assembly 100.

[0074] In some other embodiments, such as Figure 5 , the blower housing 10 passes through the end plate of the volute air duct 101. The blower housing 10 has a first part extending into the volute air duct 101 and a second part extending out of the volute air duct 101. Additionally, the ratio of the first part to the second part can be set to be greater than 1 / 4 and less than or equal to 4. For example, setting the ratio of the first part to the second part to 1 / 4, 1 / 2, 1, 3, 3.5, or 4, etc., can balance reducing the size of the blower assembly 100 and increasing the internal volume of the volute air duct 101, and while achieving stable air supply, reduce the size of the blower assembly 100.

[0075] In some embodiments, the volute air duct 101 is provided with a first end plate 1112 and a second end plate 1122 opposite to each other along the axial direction. The motor housing 20 is disposed on the first end plate 1112, and the inlet of the volute air duct 101 is disposed on the second end plate 1122 of the motor housing 20. Disposing the motor housing 20 on one end plate of the volute air duct 101 can facilitate the placement of the motor device 40 and facilitate driving the impeller device 30 to rotate by the motor device 40, simplify the transmission structure between the motor device 40 and the impeller device 30, thereby improving the transmission stability and transmission efficiency. Additionally, by simplifying the structure, it also helps with the miniaturized design of the blower assembly 100.

[0076] Such as Figures 4 to 6 , in some embodiments, the motor housing 20 includes a cylindrical part 23 extending along the axis of the impeller device 30. The cylindrical part 23 has one end and the other end opposite to each other along the axial direction. Among them, one end of the cylindrical part 23 is closer to the volute air duct 101 than the other end. The shape of the motor housing 20 includes but is not limited to the following examples.

[0077] In the first example, one end of the cylindrical part 23 along the axis is open, and the other end is also open.

[0078] In the second example, a first end cover 21 is provided at one end of the cylindrical part 23 along the axis, and the other end is open. Optionally, the first end cover 21 is provided with a shaft hole for the rotating shaft of the motor device 40 to pass through and extend into the volute air duct 101 to connect to the impeller device 30. Additionally, the first end cover 21 and the cylindrical part 23 can be integrally formed.

[0079] In the third example, one end of the cylindrical body portion 23 is open along the axis, and a second end cover 22 is provided at the other end. Optionally, the second end cover 22 covers the cylindrical body portion 23 of the motor housing 20 to prevent external impurities such as water and dust from entering the installation cavity, thereby improving the operating stability of the motor device 40. Additionally, the second end cover 22 and the cylindrical body portion 23 can be integrally formed.

[0080] In the fourth example, a first end cover 21 is provided at one end of the cylindrical body portion 23 along the axis, and a second end cover 22 is provided at the other end. Optionally, the first end cover 21 is provided with a shaft hole for the rotating shaft of the motor device 40 to pass through and extend into the volute air duct 101 to connect with the impeller device 30; the second end cover 22 covers the cylindrical body portion 23 to prevent external impurities such as water and dust from entering the installation cavity, thereby improving the operating stability of the motor device 40. Additionally, the first end cover 21 and the cylindrical body portion 23 can be integrally formed, and the second end cover 22 and the cylindrical body portion 23 can be integrally formed.

[0081] Furthermore, the motor stator 41 of the present utility model can also be constructed as an integral structure with the motor housing 20. This can simplify the structure of the motor device 40, achieve stable cooperation between the motor device 40 and the motor housing 20, improve the structural strength of the motor device 40, and extend the service life of the motor device 40.

[0082] Among them, the motor housing 20 is plastic-molded and wraps the motor stator 41. The motor housing 20 can be set to be injection-molded integrally. During the molding process, the motor stator 41 can be positioned in the mold, and the motor housing 20 can be molded by methods such as potting, thereby realizing the integral injection molding of the motor housing 20 and the motor positioning. Of course, the motor housing 20 and the motor stator 41 of the present utility model can also be set to other molding methods. Additionally, the motor stator 41 of the present utility model can include structures such as a stator coil and a stator core, that is to say, the stator coil and the stator core can be integrally formed with the motor housing 20.

[0083] Such as Figures 1 to 8 , in some embodiments, the blower assembly 100 is further provided with an air inlet duct 102, and the air inlet duct 102 is communicated with the volute air duct 101. This can simplify the structure of the blower assembly 100, enable the blower assembly 100 to quickly and stably exhaust smoke, improve the smoke exhaust efficiency of the blower assembly 100, and thereby improve the working efficiency of the water heater.

[0084] Optionally, in combination with some of the foregoing embodiments, the fan housing 10 includes a first housing 111 and a second housing 112. The first housing 111 and the second housing 112 are connected along the axial direction of the impeller device 30 and construct a volute air duct 101. The air inlet duct 102 is provided in the first housing 111. In combination with the foregoing embodiments, the first housing 111 can be integrally formed, preferably, the first housing 111 is integrally injection molded; the second housing 112 can also be integrally formed, preferably, the second housing 112 is integrally injection molded. This can simplify the structure of the fan housing 10 and facilitate the molding of the fan housing 10.

[0085] In addition, in combination with some other foregoing embodiments, the fan housing 10 includes a third housing 113 and a fourth housing 114. The third housing 113 and the fourth housing 114 are connected along the radial direction of the impeller device 30 and construct a volute air duct 101 and an air inlet duct 102.

[0086] The gas water heater according to the embodiment of the present invention includes: the foregoing fan assembly 100; a combustion chamber, the combustion chamber is connected to the fan assembly 100 and is communicated with the volute inlet 1011 of the volute air duct 101.

[0087] In some embodiments, the fan housing 10 includes a smoke collecting hood. An air inlet duct 102 is constructed in the smoke collecting hood. The air inlet duct 102 is communicated with the volute air duct 101, and the air inlet duct 102 covers the upper part of the combustion chamber.

[0088] The gas water heater according to the embodiment of the present invention includes: the foregoing fan assembly 100 and a combustion chamber. The combustion chamber is connected to the fan assembly 100 and is communicated with the volute inlet 1011 of the volute air duct 101. Wherein, a burner can be arranged in the combustion chamber. Flue gas will be generated during the combustion process of the burner. Under the suction action of the fan assembly 100, the flue gas can be collected through the air inlet duct 102 and sent out from the outlet of the fan assembly 100. The air resistance of the fan assembly 100 in the present invention is small and it is easy to mold, which can improve the production efficiency of the fan assembly 100 while ensuring the flue gas circulation.

[0089] In some embodiments, the combustion chamber and the fan assembly 100 are distributed in the left-right direction, and the left-right direction is parallel to the axis of the volute air duct 101. This can reduce the flue gas resistance and improve the smoke exhaust performance, so as to provide a better combustion environment for the combustion chamber, realize the full combustion of gas, and save energy and protect the environment. For example, the air inlet duct 102 can be arranged above the combustion chamber.

[0090] Optionally, the blower housing 10 includes a smoke collecting hood. An air inlet duct 102 is configured inside the smoke collecting hood. The air inlet duct 102 communicates with the volute duct 101 and is disposed above the combustion chamber. This can facilitate the collection of flue gas by the smoke collecting hood to achieve smoke exhaust, thereby improving the safety and stability of the gas water heater.

[0091] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0092] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. It may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0095] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0096] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A fan assembly (100), characterized in that, Comprising: A fan housing (10), the fan housing (10) being provided with a volute air duct (101); An impeller device, the impeller device being rotatably arranged in the volute air duct (101); A motor housing (20), the motor housing (20) being connected to the fan housing (10), at least a part of the motor housing (20) being integrally formed with the fan housing (10), the motor housing (20) being provided with an installation cavity; A motor device, the motor device being arranged in the installation cavity, the motor device including a motor stator and a motor rotor, the motor rotor being in rotational cooperation with the motor stator, the motor stator being connected to the motor housing (20) and being relatively stationary, the motor rotor being drivingly connected to the impeller device.

2. The blower assembly (100) according to claim 1, wherein, At least a part of the motor housing (20) is integrally formed by plastic with the fan housing (10).

3. The blower assembly (100) according to claim 1, characterized in that, The fan housing (10) includes a first housing (111) and a second housing (112), the first housing (111) and the second housing (112) being connected along the axial direction of the impeller device and constructing the volute air duct (101), the motor housing (20) being integrally formed with the second housing (112); Or, the fan housing (10) includes a third housing (113) and a fourth housing (114), the third housing (113) and the fourth housing (114) being connected along the radial direction of the impeller device and constructing the volute air duct (101), wherein, the motor housing (20) is integrally formed with the third housing (113); or the motor housing (20) is integrally formed with the fourth housing (114); or a part of the motor housing (20) is integrally formed with the third housing (113) and another part is integrally formed with the fourth housing (114).

4. The fan assembly (100) according to any one of claims 1-3, characterized in that, The fan housing (10) is configured as a high-temperature resistant housing; or, the motor housing (20) is configured as a high-temperature resistant housing.

5. The fan assembly (100) according to any one of claims 1-3, characterized in that, The fan housing (10) is configured as a plastic housing or a resin housing; or, the motor housing (20) is configured as a plastic housing or a resin housing.

6. The fan assembly (100) according to any one of claims 1-3, characterized in that, The fan housing (10) is configured as a BMC housing; or, the motor housing (20) is configured as a BMC housing.

7. The fan assembly (100) according to any one of claims 1-3, characterized in that, The fan housing (10) has opposite first and second ends, wherein, the first end of the fan housing (10) extends into the volute air duct (101) and the second end is connected to the end plate of the volute air duct (101); or, the first end of the fan housing (10) is connected to the end plate of the volute air duct (101) and the second end extends into the volute air duct (101).

8. The fan assembly (100) according to any one of claims 1-3, characterized in that, The fan housing (10) penetrates through the end plate of the volute air duct (101), the fan housing (10) having a first part extending into the volute air duct (101) and a second part extending out of the volute air duct (101), the ratio of the first part to the second part being greater than 1 / 4 and less than or equal to 4.

9. The fan assembly (100) according to any one of claims 1-3, characterized in that, The volute air duct (101) is provided with a first end plate (1112) and a second end plate (1122) that are opposite to each other in the axial direction. The motor housing (20) is arranged on the first end plate (1112), and the inlet of the volute air duct (101) is arranged on the second end plate (1122) of the motor housing (20).

10. The fan assembly (100) according to any one of claims 1-3, characterized in that, The motor housing (20) includes a cylindrical body portion (23) extending along the axis of the impeller device. Among them, one end of the cylindrical body portion (23) along the axis is open or provided with a first end cover (21); and / or the other end of the cylindrical body portion (23) is open or provided with a second end cover (22).

11. The fan assembly (100) according to claim 10, characterized in that, The first end cover (21) is integrally formed with the motor housing (20); or, the second end cover (22) is integrally formed with the motor housing (20).

12. The fan assembly (100) according to claim 1, wherein, The motor stator and the motor housing (20) are constructed as an integral structure; and / or, the motor housing (20) is formed by plastic molding and wraps the motor stator.

13. The fan assembly (100) according to claim 1, wherein, The fan assembly (100) is further provided with an air inlet duct (102), and the air inlet duct (102) is communicated with the volute air duct (101). Among them, the fan housing (10) includes a first housing (111) and a second housing (112). The first housing (111) and the second housing (112) are connected in the axial direction of the impeller device and construct the volute air duct (101). The air inlet duct (102) is arranged in the first housing (111); or, the fan housing (10) includes a third housing (113) and a fourth housing (114). The third housing (113) and the fourth housing (114) are connected in the radial direction of the impeller device and construct the volute air duct (101) and the air inlet duct (102).

14. A gas water heater, characterized in that, Comprising: The fan assembly (100) according to any one of claims 1-13; A combustion chamber, the combustion chamber is connected to the fan assembly (100) and communicated with the inlet of the volute air duct (101); the fan housing (10) includes a smoke collecting hood, an air inlet duct (102) is constructed in the smoke collecting hood, the air inlet duct (102) is communicated with the volute air duct (101), and the air inlet duct (102) covers the upper part of the combustion chamber.

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