Fan assembly and gas water heater

Abstract

A fan assembly and a gas water heater. The fan assembly comprises: a fan housing (10), the fan housing (10) being provided with a volute air channel (101), and the volute air channel (101) having a volute inlet (1011) and a volute outlet (1012); and a freeze protection device (50), the freeze protection device (50) comprising an air pipe (51) and a blade (52), the air pipe (51) being connected to the fan housing (10) and being communicated with the volute outlet (1012), at least a part of the air pipe (51) being integrally formed with the fan housing (10), and the blade (52) being connected to the air pipe (51) and being configured to be unidirectionally opened in the air outlet direction of the volute air channel (101).

Description

Fan assembly and gas water heater

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411127910.6, filed on August 15, 2024, and Chinese Patent Application No. 202421989580.7, filed on August 15, 2024, the contents of which are incorporated by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of water heaters, and in particular to a fan assembly and a gas water heater. BACKGROUND

[0004] At present, water heaters are commonly used household appliances in people's daily life. Water heaters are divided into types such as gas water heaters and electric water heaters, among which, gas water heaters are widely used due to their convenient use. A conventional gas water heater usually includes a burner, a combustion chamber, a heat exchanger, and a smoke hood, etc. The burner burns gas in the combustion chamber to heat the water flowing through the heat exchanger, and the flue gas is discharged to the outdoor through the fan in the smoke hood. SUMMARY

[0005] One purpose of the present application is to provide a fan assembly and a gas water heater.

[0006] According to the fan assembly of the present application, the fan assembly comprises a fan housing, the fan housing is provided with a volute air duct, the volute air duct has a volute inlet and a volute outlet; an anti-freezing device, the anti-freezing device comprises a wind pipe and a blade, the wind pipe is connected to the fan housing and communicates with the volute outlet, at least a part of the wind pipe is integrally formed with the fan housing, the blade is connected to the wind pipe and is configured to open unidirectionally along the air outlet direction of the volute air duct.

[0007] According to the fan assembly of the present application, the anti-freezing device is provided to achieve the anti-freezing of the fan assembly and the gas water heater having the same, and at least a part of the wind pipe is integrally formed with the fan housing, thereby simplifying the structure of the fan assembly, reducing the air leakage, and improving the structural strength of the fan assembly.

[0008] In addition, the fan assembly according to the above embodiments of the present application can also have the following additional technical features:

[0009] In some embodiments, the wind pipe comprises a first pipe portion and a second pipe portion which are connected in a radial direction, the first pipe portion and the second pipe portion enclose the wind pipe, the blade is arranged between the first pipe portion and the second pipe portion, and the first pipe portion is integrally formed with at least a part of the fan housing.

[0010] In some embodiments, the second tube portion is integrally formed with at least a portion of the fan housing.

[0011] In some embodiments, the fan housing comprises a first housing and a second housing, the first housing and the second housing being connected along an axis of the volute duct, the volute duct being disposed between the first housing and the second housing, wherein the first tube portion is integrally formed with the first housing.

[0012] In some embodiments, the second tube portion is integrally formed with the second housing.

[0013] In some embodiments, the fan housing comprises a third housing and a fourth housing, the third housing and the fourth housing being connected along a predetermined direction, the volute duct being disposed between the third housing and the fourth housing, the predetermined direction being perpendicular to an axis of the volute outlet and an axis of the volute duct, wherein the first tube portion is integrally formed with the third housing.

[0014] In some embodiments, the second tube portion is integrally formed with the fourth housing.

[0015] In some embodiments, the fan housing comprises a fifth housing and a sixth housing, the fifth housing and the sixth housing being connected along an axis of the volute outlet, the volute duct being disposed between the fifth housing and the sixth housing, wherein one of the first tube portion and the second tube portion is integrally formed with the fifth housing.

[0016] In some embodiments, the duct comprises a third tube portion and a fourth tube portion being connected along an axis, the third tube portion being integrally formed with at least a portion of the fan housing, the blade being disposed in the third tube portion, in the fourth tube portion, or between the third tube portion and the fourth tube portion.

[0017] In some embodiments, the fan housing comprises a first housing and a second housing, the first housing and the second housing being connected along an axis of the volute duct, the volute duct being disposed between the first housing and the second housing, wherein the third tube portion is integrally formed with the first housing or the second housing.

[0018] In some embodiments, the fan housing comprises a third housing and a fourth housing, the third housing and the fourth housing being connected along a predetermined direction, the volute duct being disposed between the third housing and the fourth housing, the predetermined direction being perpendicular to an axis of the volute outlet and an axis of the volute duct, wherein the third tube portion is integrally formed with the third housing or the fourth housing.

[0019] In some embodiments, the fan housing comprises a fifth housing and a sixth housing, the fifth housing and the sixth housing are connected along an axis of the outlet of the volute, the volute duct is arranged between the fifth housing and the sixth housing, and the third pipe portion is integrally formed with the fifth housing.

[0020] In some embodiments, the air pipe is integrally formed with at least a portion of the fan housing, and the blade is arranged in the air pipe.

[0021] In some embodiments, the fan housing comprises a first housing and a second housing, the first housing and the second housing are connected along an axis of the volute duct, the volute duct is arranged between the first housing and the second housing, and the air pipe is integrally formed with the first housing or the second housing.

[0022] In some embodiments, the fan housing comprises a third housing and a fourth housing, the third housing and the fourth housing are connected along a predetermined direction, the volute duct is arranged between the third housing and the fourth housing, the predetermined direction is perpendicular to an axis of the outlet of the volute and an axis of the volute duct, and the air pipe is integrally formed with the third housing or the fourth housing.

[0023] In some embodiments, the fan housing comprises a fifth housing and a sixth housing, the fifth housing and the sixth housing are connected along an axis of the outlet of the volute, the volute duct is arranged between the fifth housing and the sixth housing, and the third pipe portion is integrally formed with the fifth housing.

[0024] In some embodiments, the fan housing is configured as a high-temperature-resistant shell, a plastic shell, a resin shell, and / or a BMC shell.

[0025] In some embodiments, the air pipe is configured as a high-temperature-resistant shell, a plastic shell, a resin shell, and / or a BMC shell.

[0026] In some embodiments, the blade is rotationally connected to the air pipe, the blade is located at a first position and opens the air pipe when an internal air pressure of the volute duct is higher than an external air pressure of the fan assembly by a predetermined value, and the blade is located at a second position and closes the air pipe when the internal air pressure of the volute duct is not higher than the external air pressure of the fan assembly.

[0027] In some embodiments, the anti-freezing device further comprises:

[0028] A seat body connected to the air pipe, the seat body being provided with an air outlet;

[0029] A rotating shaft is connected to the seat body, the vane is connected to the rotating shaft and rotatable around the rotating shaft, and the vane opens the air port in the first position and closes the air port in the second position.

[0030] In some embodiments, the seat body comprises a ring-shaped rib arranged in the air duct and along the peripheral wall of the air duct, and a strip-shaped rib having two ends respectively connected to opposite sides of the ring-shaped rib, the strip-shaped rib dividing the ring-shaped rib into a first air port and a second air port, the vane comprises a first sub-vane connected to the rotating shaft and rotatable to open and close the first air port, and a second sub-vane connected to the rotating shaft and rotatable to open and close the second air port.

[0031] In some embodiments, the rotating shaft is opposite to the strip-shaped rib along the air duct axis.

[0032] In some embodiments, the outer peripheral surface of the ring-shaped rib is provided with a clearance groove, and the end of the rotating shaft is arranged in the ring-shaped rib and located in the clearance groove.

[0033] In some embodiments, the outer peripheral surface of the ring-shaped rib is provided with a first flange portion, and the first flange portion is sleeved on the inner side surface of the air duct.

[0034] In some embodiments, the inner peripheral surface of the first air port and the inner peripheral surface of the second air port are provided with a second flange, and the vane is supported on the second flange in the second position.

[0035] In some embodiments, the seat body further comprises a blocking rib configured to limit the rotation angle of the first sub-vane and the second sub-vane.

[0036] In some embodiments, the air duct extends in the up-down direction and the lower end is connected to the fan housing, and when the air pressure in the volute air duct is not higher than the external air pressure of the fan assembly, the vane is supported on the seat body.

[0037] In some embodiments, the fan assembly is further provided with an air inlet duct in communication with the volute air duct.

[0038] In some embodiments, the fan housing comprises a first housing and a second housing, the first housing and the second housing are connected along the axis of the volute air duct, the volute air duct is arranged between the first housing and the second housing, and the air inlet duct is arranged in the first housing.

[0039] In some embodiments, the fan housing comprises a third housing and a fourth housing, the third housing and the fourth housing are connected along a predetermined direction, the volute air duct and the air inlet air duct are arranged between the third housing and the fourth housing, and the predetermined direction is perpendicular to the axis of the volute outlet and the axis of the volute air duct.

[0040] In some embodiments, the fan housing comprises a fifth housing and a sixth housing, the fifth housing and the sixth housing are connected along the axis of the volute outlet, and the volute air duct and the air inlet air duct are arranged between the fifth housing and the sixth housing.

[0041] The gas water heater according to the embodiments of the present application comprises the fan assembly described above; a combustion chamber connected with the fan assembly and in communication with the inlet of the volute air duct.

[0042] In some embodiments, the fan housing comprises a fume collecting hood, an air inlet air duct is formed in the fume collecting hood, the air inlet air duct is in communication with the volute air duct, and the air inlet air duct cover is arranged above the combustion chamber.

[0043] The gas water heater according to the embodiments of the present application comprises a combustion chamber and a fan assembly connected with the combustion chamber for discharging fume from the combustion chamber, and at least a part of the fan assembly is located outside the combustion chamber in horizontal projection.

[0044] The gas water heater according to the embodiments of the present application is beneficial to reducing the size of the gas water heater and optimizing the energy efficiency and space utilization of the gas water heater.

[0045] In addition, the gas water heater according to the above-mentioned embodiments of the present application can also have the following additional technical features:

[0046] In some embodiments, the fan assembly is connected to the upper end of the combustion chamber, and a containing space located below the fan assembly is arranged at the side of the combustion chamber.

[0047] In some embodiments, the gas water heater further comprises an electric control assembly arranged in the containing space.

[0048] In some embodiments, the gas water heater further comprises a water inlet pipe and a water outlet pipe, and at least one of the water inlet pipe and the water outlet pipe is arranged in the containing space.

[0049] In some embodiments, the gas water heater further comprises a water inlet valve arranged in the containing space.

[0050] In some embodiments, the gas water heater further comprises a water outlet valve arranged in the containing space.

[0051] In some embodiments, the fan assembly is connected to a lower end of the combustion chamber, and the combustion chamber is provided with a receiving space above the fan assembly.

[0052] In some embodiments, the fan assembly comprises a fan housing, an impeller device and a motor device, the fan housing is configured with a volute air duct connected to the combustion chamber, the impeller device is arranged in the fan housing, and the motor device is drivingly connected to the impeller device, at least a part of the fan housing is located outside the combustion chamber in horizontal projection.

[0053] In some embodiments, the fan housing comprises a fume hood and a volute, one end of the fume hood covers the combustion chamber, the other end of the fume hood is connected to the volute, the impeller device is arranged in the volute, and the volute is arranged at an end of the combustion chamber in horizontal projection.

[0054] In some embodiments, at least a part of the volute is located outside the combustion chamber in horizontal projection, and the lower end is lower than the upper edge of the combustion chamber.

[0055] In some embodiments, the axis of the volute is inclined upward in the direction from the fume hood to the volute.

[0056] In some embodiments, the top wall of the fume hood is inclined upward in the direction from the fume hood to the volute, and is connected to the volute.

[0057] In some embodiments, the extension direction of the top wall of the fume hood is the same as the extension direction of the axis of the volute.

[0058] In some embodiments, the inlet and outlet of the volute are arranged above the combustion chamber.

[0059] In some embodiments, the fume hood is connected to the end plate of the volute and surrounds the inlet of the volute.

[0060] In some embodiments, the fan housing further comprises a smoke exhaust pipe, and the smoke exhaust pipe is connected to the outlet of the volute.

[0061] In some embodiments, the smoke exhaust pipe is arranged to extend in the up-down direction.

[0062] In some embodiments, the smoke exhaust pipe has a transition section and an air outlet section, the air outlet section extends in the up-down direction, one end of the transition section is connected to the volute, and the other end is connected to the air outlet section.

[0063] In some embodiments, the fan assembly comprises: a fan housing, the fan housing being provided with a volute air duct; an impeller device, the impeller device being rotatably provided in the volute air duct; a motor housing, the motor housing being connected with the fan housing, at least a portion of the motor housing being integrally formed with the fan housing, the motor housing being provided with a mounting cavity; a motor device, the motor device being provided in the mounting cavity, the motor device comprising a motor stator and a motor rotor, the motor rotor being rotatably connected with the motor stator, the motor stator being connected with the motor housing and being relatively static, the motor rotor being drivingly connected with the impeller device.

[0064] In some embodiments, the fan housing comprises a first housing and a second housing, the first housing and the second housing being connected and configured to form the volute air duct.

[0065] In some embodiments, the seventh housing and the eighth housing are connected along an axis of the volute.

[0066] In some embodiments, the seventh housing and the eighth housing are connected along a predetermined direction, the predetermined direction being perpendicular to an outlet axis of the volute and the axis of the volute.

[0067] In some embodiments, the seventh housing and the eighth housing are connected along an outlet axis of the volute.

[0068] In some embodiments, at least one of the seventh housing and the eighth housing is configured as a high-temperature-resistant housing, a plastic housing, a resin housing and / or an EMC housing.

[0069] In some embodiments, the seventh housing is integrally formed.

[0070] In some embodiments, the eighth housing is integrally formed. BRIEF DESCRIPTION OF DRAWINGS

[0071] FIG. 1 is a schematic view of a fan assembly according to an embodiment of the present application.

[0072] FIG. 2 is a sectional view of a fan assembly according to an embodiment of the present application.

[0073] FIG. 3 is an exploded view of a fan assembly according to an embodiment of the present application.

[0074] FIG. 4 is a perspective view of a fan assembly according to an embodiment of the present application.

[0075] FIG. 5 is a perspective view of a fan assembly according to another embodiment of the present application.

[0076] FIG. 6 is a perspective view of a fan assembly according to yet another embodiment of the present application.

[0077] Fig. 7 is a schematic view of the anti-freezing device of the fan assembly according to an embodiment of the present application.

[0078] Fig. 8 is an assembly view of the seat body, the rotating shaft and the blades of the anti-freezing device of the fan assembly according to an embodiment of the present application.

[0079] Fig. 9 is a schematic view of the seat body of the anti-freezing device of the fan assembly according to an embodiment of the present application.

[0080] Fig. 10 is a schematic view of a gas water heater according to an embodiment of the present application.

[0081] Fig. 11 is a schematic view of a gas water heater according to an embodiment of the present application.

[0082] Fig. 12 is a schematic view of a fan assembly of a gas water heater according to an embodiment of the present application.

[0083] Fig. 13 is a sectional view of a fan assembly of a gas water heater according to an embodiment of the present application.

[0084] Fig. 14 is a schematic view of a fan housing of a fan assembly of a gas water heater according to an embodiment of the present application.

[0085] Fig. 15 is a schematic view of a fan housing of a fan assembly of a gas water heater according to another embodiment of the present application.

[0086] Fig. 16 is a schematic view of a fan housing of a fan assembly of a gas water heater according to still another embodiment of the present application.

[0087] Fig. 17 is a sectional view of a fan assembly of a gas water heater according to an embodiment of the present application.

[0088] Reference signs: gas water heater 1000, fan assembly 100, fan housing 10, volute 11, smoke collecting cover 12, smoke exhaust pipe 13, volute air duct 101, volute inlet 1011, volute outlet 1012, air inlet duct 102, first housing 111, second housing 112, third housing 113, fourth housing 114, fifth housing 115, sixth housing 116, smoke collecting cover 12, motor housing 20, impeller device 30, motor device 40, anti-freezing device 50, air pipe 51, first pipe portion 511, second pipe portion 512, third pipe portion 513, fourth pipe portion 514, blade 52, first sub-blade 521, second sub-blade 522, seat body 53, annular rib 531, strip rib 532, blocking rib 533, first air outlet 501, second air outlet 502, accommodation groove 503, first flange portion 504, second flange portion 505, rotating shaft 54, combustion chamber 200, casing 300, accommodation space 301, electric control assembly 400, water inlet pipe 601, water outlet pipe 602, water inlet valve 603, water outlet valve 604. DETAILED DESCRIPTION

[0089] A fan is usually installed in a gas water heater, which is used to exhaust the exhaust gas and waste heat generated during the use of the water heater, so as to reduce the impact of the exhaust gas and waste heat on the normal operation of the water heater. In the related art gas water heater, outdoor airflow is prone to backflow, affecting the stability of the operation of the gas water heater, especially in cold winter, cold air backflow can easily cause the gas water heater to freeze and fail to start.

[0090] In order to prevent cold air backflow from causing the gas water heater to freeze and fail to start, a fan assembly provided with an anti-freezing device is provided in the related art, which usually includes a wind pipe and a blade, wherein the wind pipe is connected to the volute, and the blade is arranged in the wind pipe for opening and closing the wind pipe. In the related art, the wind pipe and the volute are usually provided in a split structure, and the wind pipe and the volute are molded separately and then assembled together, which can affect the structural strength of the fan housing, and at the same time, gaps can exist at the connection between the wind pipe and the volute, causing smoke to leak from the connection between the wind pipe and the volute, affecting the use of the gas water heater. In addition, since the wind pipe and the volute are molded separately, both the wind pipe and the volute will have machining errors, and these machining errors will be stacked when the wind pipe and the volute are assembled together, which can cause the volute and the wind pipe to be difficult to assemble together, affecting the yield of the fan assembly. Moreover, since the wind pipe and the volute are molded separately and then assembled, the strength of the connection between the wind pipe and the volute is relatively weak, affecting the connection strength and stability of the fan assembly, and affecting the service life of the fan assembly.

[0091] Therefore, the present application provides a fan assembly, at least a part of the wind pipe and the volute of which are integrally molded. The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0092] As shown in FIGS. 1-3, the fan assembly 100 according to an embodiment of the present application includes a fan housing 10, which is provided with a volute air duct 101 and is provided with a volute inlet 1011 and a volute outlet 1012, and the volute air duct 101 is arranged between the volute inlet 1011 and the volute outlet 1012.

[0093] The fan assembly 100 further includes an anti-freezing device 50, which includes a wind pipe 51 and a blade 52, the wind pipe 51 is connected to the fan housing 10 and communicates with the volute outlet 1012, and the blade 52 is connected to the wind pipe 51 and is configured to open in one direction along the air outlet direction of the volute air duct 101, that is, after the airflow or smoke in the volute air duct 101 is sent out from the volute outlet 1012, it can be sent out of the fan assembly 100 through the anti-freezing device 50; and the airflow outside the fan assembly 100 is difficult to flow back into the fan assembly 100 through the anti-freezing device 50.

[0094] In addition, the fan assembly 100 further comprises an impeller device 30 and a motor device 40, the impeller device 30 is arranged in the volute air duct 101, and the impeller device 30 is rotatable and can drive the airflow to flow from the volute inlet 1011 to the volute outlet 1012 through rotation, so as to realize the driving of the airflow. The motor device 40 is connected with the impeller device 30 and is used for driving the impeller device 30 to rotate. Optionally, the motor device 40 can comprise a motor stator and a motor rotor, the motor rotor is in rotational cooperation with the motor stator, the motor stator is connected with the motor housing and is relatively static, and the motor rotor is in transmission connection with the impeller device 30.

[0095] According to the fan assembly 100 provided by the embodiment of the present application, the anti-freezing device 50 is arranged and is in communication with the volute air duct 101 through the air pipe 51. In use, under the suction of the fan assembly 100, the flue gas and the like can enter the air pipe 51 and open the blade 52 to discharge the flue gas. When the external air flows back along the air pipe 51, the blade 52 will hinder the airflow from flowing back, so that the discharged flue gas and the like can be prevented from flowing back to the fan assembly 100. In addition, when the outdoor temperature is low, the anti-freezing device 50 can be used to prevent the cold air in the external environment from flowing back to the fan assembly 100, so as to realize the anti-freezing of the fan assembly 100 and the gas water heater 1000 provided with the fan assembly 100.

[0096] Optionally, with reference to FIGS. 1 to 3, the fan assembly 100 provided by the present application can have a front-rear direction, an up-down direction and a left-right direction which are perpendicular to each other. The fan assembly 100 has an air inlet duct 102 and a volute air duct 101, the air inlet duct 102 is in communication with the volute air duct 101, the airflow can pass through the air inlet duct 102 and enter the volute air duct 101, and then pass through the volute air duct 101 and be sent out from the volute outlet 1012. The volute air duct 101 is provided with the volute inlet 1011 on one end plate along the axial direction and is provided with the volute outlet 1012 on the peripheral wall, and the air inlet duct 102 is in communication with the volute inlet 1011. Of course, the orientation is mainly described according to the drawings in the present application, which is not a limitation on the protection scope of the present application. The technical solutions obtained by adjusting the orientation according to the scheme of the present application are still within the protection scope of the present application, for example, the left-right direction in the drawings is reversed.

[0097] With reference to FIG. 1 and FIG. 2, the axis of the volute air duct 101 is configured to be inclined 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 pipe 51 is parallel to the up-down direction. In this way, the air flow can pass into the air inlet duct 102 through the inlet of the air inlet duct 102 in the up-down direction; under the flow guiding or flow collecting effect of the air inlet duct 102, the air flow passes into the volute air duct 101 through the volute inlet 1011; then the air flow passes into the anti-freezing device 50 through the volute outlet 1012 of the volute air duct 101, and finally is sent out from the anti-freezing device 50. The whole process is smooth and the air resistance is small, which can effectively improve the energy efficiency of the fan assembly 100.

[0098] Optionally, the volute inlet 1011 is provided with a flange structure, which is configured to extend in the direction from the air inlet duct 102 to the volute air duct 101. In this way, the air inlet duct 102 and the volute air duct 101 are conveniently connected, and the volute air duct 101 is connected with the air inlet duct 102 through the inlet, which facilitates smoke exhaust. In addition, the flange structure can form a flow guiding structure to guide the flue gas, further reduce the air resistance at the volute inlet 1011, and further gather the flue gas, which facilitates smoke exhaust. The flange structure cooperates to form an annular structure extending along the periphery of the volute inlet 1011.

[0099] Optionally, in some embodiments, at least a part of the air pipe 51 is integrally formed with the fan housing 10. Through the integral structure of the air pipe 51 and the fan housing 10, the problems of weak structural strength or stress concentration at the connection between the air pipe 51 and the fan housing 10 can be avoided, the connection strength between the air pipe 51 and the fan housing 10 can be improved, and thus the service life of the fan assembly can be improved. Moreover, since at least a part of the air pipe 51 is integrally formed with the fan housing 10, the problem that the air pipe 51 and the fan housing 10 are difficult to assemble due to the accumulation of errors at the connection between the air pipe 51 and the fan housing 10 can be avoided or reduced, and thus the yield and assembly efficiency of the fan assembly can be improved.

[0100] It should be further noted that through the integral forming mode, the possibility of a gap at the connection can be avoided or reduced, and the leakage of flue gas from the connection between the air pipe 51 and the fan housing 10 can be avoided.

[0101] In the related art, the air duct and the fan shell are in a split structure, so the air duct and the fan shell need to be made separately, resulting in a relatively complex process. For example, the air duct is provided with two half pipes, and the fan shell is provided with two parts. In the processing of the fan assembly in the related art, at least four parts need to be made separately and then assembled together, and the assembly is relatively complex. When either of the two half pipes is integrally formed with the fan shell, at least one part of the processing process can be reduced. For example, the two half pipes are integrally formed with the two parts of the fan shell, so only two parts need to be made, and the two parts can be assembled together, thereby simplifying the processing process of the fan assembly 100 and improving the production efficiency of the fan assembly 100.

[0102] In the related art, the volute is formed by sheet metal forming, which is difficult to form a complex shape. Therefore, the volute in the related art is difficult to be provided in an integrated structure with the air duct. The applicant of the present application has made a breakthrough by providing the fan shell and the air duct in a material such as BMC, resin, or high-temperature-resistant plastic, which can more conveniently form a relatively complex shape. Therefore, the fan shell in the present application is more likely to be formed in a complex shape, and at least a part of the air duct is provided in an integrated structure with the fan shell.

[0103] In the present application, the cooperation structure of the air duct 51 and the fan shell 10 includes but is not limited to the following embodiments.

[0104] Embodiment one

[0105] As shown in FIG. 3, the air duct 51 includes a first pipe portion 511 and a second pipe portion 512 that are connected in the radial direction. The first pipe portion 511 and the second pipe portion 512 enclose the air duct 51, and the blade 52 is arranged between the first pipe portion 511 and the second pipe portion 512. In the assembly process, the blade 52 can be arranged between the first pipe portion 511 and the second pipe portion 512. After the first pipe portion 511 and the second pipe portion 512 are assembled together, the blade 52 will be positioned between the first pipe portion 511 and the second pipe portion 512, thereby achieving stable assembly of the anti-freezing device 50.

[0106] Optionally, the first pipe portion 511 is integrally formed with at least a part of the fan shell 10; and / or, the second pipe portion 512 is integrally formed with at least a part of the fan shell 10.

[0107] Example one, as shown in FIG. 3 and FIG. 4, the fan shell 10 includes a first shell 111 and a second shell 112, the first shell 111 and the second shell 112 are connected along the axis of the volute air duct 101, and the volute air duct 101 is arranged between the first shell 111 and the second shell 112.

[0108] Optionally, the first shell 111 comprises a first sub-shell and a third sub-shell, and the second shell 112 comprises a second sub-shell and a fourth sub-shell, the volute air duct 101 is arranged between the first sub-shell and the second sub-shell, and the volute outlet 1012 is arranged between the third sub-shell and the fourth sub-shell. The first sub-shell can comprise a first side plate and a first end plate, the first side plate can be configured in a cylindrical shape, and the first end plate is connected to one side edge of the first side plate; the second sub-shell can comprise a second side plate and a second end plate, the second side plate can be configured in a cylindrical shape, and the second end plate is connected to one side edge of the second side plate. The other side edge of the first side plate and the other side edge of the second side plate are connected to form the volute air duct 101. The third sub-shell is connected to the first side plate, and the fourth sub-shell is connected to the second side plate, and the third sub-shell and the fourth sub-shell are connected to form the volute outlet 1012.

[0109] In addition, the fan shell 10 is also provided with an air inlet air duct 102, the air inlet air duct 102 is arranged in the first shell 111, the first end plate can be provided with a volute inlet 1011, and the first shell 111 can further comprise a third side plate, the third side plate is configured as a fume hood 12, the air inlet air duct 102 is formed in the inside of the fume hood 12, and the third side plate can be connected with the first end plate. The third side plate can be cylindrical, square cylindrical, triangular cylindrical or other shapes. In the assembly process of the fan assembly 100, the impeller can be installed in the volute air duct 101, and the volute air duct 101 is formed by splicing the first shell 111 and the second shell 112, which can facilitate the installation of the impeller, and the second end plate can provide support for the impeller device 30. Through this setting form, the installation efficiency of the impeller can be improved.

[0110] In some embodiments of the present application, the first shell 111 is configured to be integrally formed. Through integral forming, the processing efficiency of the first shell 111 can be improved, the processing cost of the first shell 111 can be reduced, and the first shell 111 can have higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the second shell 112 can also be configured to be integrally formed. When the first shell 111 and the second shell 112 are both configured to be integrally formed, the service life and energy efficiency of the fan assembly 100 can be further improved, and the stress concentration at the connection between the first shell 111 and the second shell 112 due to thermal expansion and cold contraction of the first shell 111 and the second shell 112 can be avoided.

[0111] At least one of the first shell 111 and the second shell 112 in the present application can be provided as a plastic shell, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. In addition, in combination with the foregoing, the air duct structure is constructed by connecting the first shell 111 and the second shell 112 in the front-rear direction in the present application, which can simplify the structure of the first shell 111 and the second shell 112, so that the first shell 111 and the second shell 112 are conveniently formed by plastic, thereby effectively reducing the cost of the fan assembly 100 and improving the forming efficiency of the fan assembly 100.

[0112] In the present application, the first shell 111 and the second shell 112 can be made of high-temperature-resistant materials and can be installed in the special environment of the water heater. For example, the first shell 111 and the second shell 112 can be respectively formed by die casting and injection molding. The first shell 111 and the second shell 112 are connected together after forming, that is, the original multiple sheet metals are simplified to form a shell composed of two parts, thereby simplifying the process flow and reducing the processing cost.

[0113] In addition, at least one of the first shell 111 and the second shell 112 in the present application can be configured as a BMC shell. BMC is essentially a semi-dry process for manufacturing glass fiber reinforced thermosetting products. 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 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0114] In addition, at least one of the first shell 111 and the second shell 112 can also be made of metal materials.

[0115] In the present application, the first shell 111 and the second shell 112 are connected by a connecting piece. Specifically, the connecting piece can be a bolt, and in other embodiments, the connecting piece can also be a wire or the like for connection. In addition, the first shell 111 and the second shell 112 can also be connected by adhesive. The first shell 111 and the second shell 112 can be connected by adhesive, and the above connection method is relatively simple and convenient to operate.

[0116] In the present application, the first shell 111 and the second shell 112 are connected by a connecting piece. Specifically, the connecting piece can be a bolt, and in other embodiments, the connecting piece can also be a wire or the like for connection. In addition, the first shell 111 and the second shell 112 can also be connected by adhesive. The first shell 111 and the second shell 112 can be connected by adhesive, and the above connection method is relatively simple and convenient to operate.

[0116] In the present application, the first shell 111 and the second shell 112 are connected by a connecting piece. Specifically, the connecting piece can be a bolt, and in other embodiments, the connecting piece can also be a wire or the like for connection. In addition, the first shell 111 and the second shell 112 can also be connected by adhesive. The first shell 111 and the second shell 112 can be connected by adhesive, and the above connection method is relatively simple and convenient to operate.

[0117] In the second example, as shown in FIG. 5, the fan housing 10 comprises a third housing 113 and a fourth housing 114, the third housing 113 and the fourth housing 114 are connected along a predetermined direction, the volute air duct 101 is arranged between the third housing 113 and the fourth housing 114, and the predetermined direction is perpendicular to the axis of the volute outlet 1012 and the axis of the volute air duct 101.

[0118] Optionally, the third housing 113 comprises a fifth sub-housing and a seventh sub-housing, the fourth housing 114 comprises a sixth sub-housing and an eighth sub-housing, the volute air duct 101 is arranged between the fifth sub-housing and the sixth sub-housing, the volute outlet 1012 is arranged between the seventh sub-housing and the eighth sub-housing, the fifth sub-housing can comprise a third end plate, a fourth end plate and a fourth side plate, the sixth sub-housing can comprise a fifth end plate, a sixth end plate and a fifth side plate, the fourth side plate is connected between the third end plate and the fourth end plate, the fifth side plate is connected between the fifth end plate and the sixth end plate, the third end plate and the fifth end plate are connected into a flat plate, the fourth end plate and the sixth end plate are connected into a flat plate, the fourth side plate and the fifth side plate are connected into a surrounding plate, and the third end plate, the fourth end plate, the fourth side plate, the fifth end plate, the sixth end plate and the fifth side plate form the volute air duct 101 therebetween. The seventh sub-housing is connected to the fourth side plate, the eighth sub-housing is connected to the fifth side plate, and the seventh sub-housing and the eighth sub-housing are connected to form the volute outlet 1012.

[0119] In addition, the fan housing 10 is also provided with an air inlet duct 102, and the volute inlet 1011 is formed between the third end plate and the fourth end plate. The third housing 113 further comprises a sixth side plate, and the fourth housing 114 further comprises a seventh side plate. The sixth side plate can be connected to the third end plate, and the seventh side plate can be connected to the fifth end plate. The sixth side plate and the seventh side plate can be configured into a fume hood 12, and the air inlet duct 102 is formed inside the fume hood 12. The fume hood 12 can be in the shape of a cylinder, a square cylinder, a triangular cylinder or other shapes. During the assembly of the fan assembly 100, the impeller can be installed in the volute air duct 101, and the third housing 113 and the fourth housing 114 are spliced to form the volute air duct 101, which can facilitate the installation of the impeller. In addition, the fourth end plate and the sixth end plate can be used to support the impeller. Through this arrangement, the installation efficiency of the impeller can be improved.

[0120] In some embodiments of the present application, the third shell 113 is configured to be integrally formed. By being integrally formed, the processing efficiency of the third shell 113 can be improved, the processing cost of the third shell 113 can be reduced, and the third shell 113 can have higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the fourth shell 114 can also be configured to be integrally formed. When the third shell 113 and the fourth shell 114 are both configured to be integrally formed, the service life and energy efficiency of the fan assembly 100 can be further improved, and stress concentration at the connection between the third shell 113 and the fourth shell 114 due to thermal expansion and contraction of the third shell 113 and the fourth shell 114 can be avoided.

[0121] At least one of the third shell 113 and the fourth shell 114 in the present application can be a plastic shell, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. In addition, in combination with the foregoing, the third shell 113 and the fourth shell 114 in the present application are connected in the front-rear direction to form an air duct structure, which can simplify the structure of the third shell 113 and the fourth shell 114, making it easier to form the third shell 113 and the fourth shell 114 from plastic, thereby effectively reducing the cost of the fan assembly 100 and improving the forming efficiency of the fan assembly 100.

[0122] In the present application, the third shell 113 and the fourth shell 114 can be made of high-temperature-resistant materials and can be installed in the special environment of a water heater. For example, the third shell 113 and the fourth shell 114 can be formed by die casting, and the formed third shell 113 and the fourth shell 114 are connected together, i.e., the original multiple sheet metals are simplified to form a shell composed of two parts, thereby simplifying the process flow and reducing the processing cost.

[0123] In addition, at least one of the third shell 113 and the fourth shell 114 in the present application can be configured as a BMC shell. BMC is essentially a semi-dry method for manufacturing glass fiber reinforced thermosetting products. 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 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in a water heater, it will not melt due to overheating.

[0124] In addition, at least one of the third shell 113 and the fourth shell 114 can also be made of metal materials.

[0125] In addition, a connecting piece is connected between the third shell 113 and the fourth shell 114. Specifically, the connecting piece can be a bolt, and in other embodiments, the connecting piece can also be a wire or the like for connection. The third shell 113 and the fourth shell 114 are additionally provided with the connecting piece, so that the connection between the third shell 113 and the fourth shell 114 is more stable, and the connection stability of the third shell 113 and the fourth shell 114 is strengthened, and the sealing effect of the connection between the third shell 113 and the fourth shell 114 is better. The third shell 113 and the fourth shell 114 can also be connected by gluing.

[0126] The first pipe part 511 is integrally formed with the third shell 113, and the second pipe part 512 can be provided as a separate part and connected to the third shell 113, the fourth shell 114, and the first pipe part 511. Alternatively, the second pipe part 512 is integrally formed with the fourth shell 114, and the first pipe part 511 can be provided as a separate part and connected to the third shell 113, the fourth shell 114, and the second pipe part 512. Alternatively, the first pipe part 511 is integrally formed with the third shell 113, and the second pipe part 512 is integrally formed with the fourth shell 114.

[0127] In example three, the fan shell 10 includes a fifth shell 115 and a sixth shell 116, and the fifth shell 115 and the sixth shell 116 are connected along the axis of the volute outlet 1012. The volute air duct 101 is arranged between the fifth shell 115 and the sixth shell 116.

[0128] Optionally, the fifth shell 115 includes a ninth sub-shell and a tenth sub-shell, and the volute air duct 101 is arranged between the ninth sub-shell and the sixth shell 116. The tenth sub-shell surrounds the volute outlet 1012. The ninth sub-shell can include a seventh end plate, an eighth end plate, and an eighth side plate. The sixth shell 116 can include a ninth end plate, a tenth end plate, and a ninth side plate. The eighth side plate is connected between the seventh end plate and the eighth end plate, and the ninth side plate is connected between the ninth end plate and the tenth end plate. The seventh end plate and the ninth end plate are connected to form a flat plate, the eighth end plate and the tenth end plate are connected to form a flat plate, the eighth side plate and the ninth side plate are connected to form a surrounding plate, and the seventh end plate, the eighth end plate, the eighth side plate, the ninth end plate, the tenth end plate, and the ninth side plate form the volute air duct 101. The sixth shell 116 is connected to the eighth side plate, and the inner side of the tenth sub-shell surrounds the volute outlet 1012.

[0129] In addition, the fan shell 10 is further provided with an air inlet duct 102, and a volute inlet 1011 is formed between the seventh end plate and the ninth end plate. The fifth shell 115 further comprises a tenth side plate, and the sixth shell 116 further comprises an eleventh side plate. The tenth side plate can be connected to the seventh end plate, and the eleventh side plate can be connected to the ninth end plate. The tenth side plate and the eleventh side plate can be configured as a fume hood 12. The fume hood 12 is internally provided with the air inlet duct 102, and the fume hood 12 can be cylindrical, square, triangular, or other shapes. During assembly of the fan assembly 100, the impeller can be installed in the volute duct 101. The fifth shell 115 and the sixth shell 116 are spliced to form the volute duct 101, which facilitates installation of the impeller and provides support for the impeller through cooperation of the eighth end plate and the tenth end plate. This configuration improves the installation efficiency of the impeller.

[0130] In some embodiments of the present application, the fifth shell 115 is configured to be integrally formed. Integrally forming the fifth shell 115 improves the processing efficiency of the fifth shell 115, reduces the processing cost of the fifth shell 115, and ensures that the fifth shell 115 has higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the sixth shell 116 can also be configured to be integrally formed. When the fifth shell 115 and the sixth shell 116 are both configured to be integrally formed, the service life and energy efficiency of the fan assembly 100 can be further improved, and stress concentration at the connection between the fifth shell 115 and the sixth shell 116 due to thermal expansion and contraction of the fifth shell 115 and the sixth shell 116 can be avoided.

[0131] At least one of the fifth shell 115 and the sixth shell 116 in the present application can be a plastic shell, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. In addition, as described above, the fifth shell 115 and the sixth shell 116 are connected in the front-rear direction to form a duct structure, which simplifies the structure of the fifth shell 115 and the sixth shell 116, making it easier to form the fifth shell 115 and the sixth shell 116 from plastic. This effectively reduces the cost of the fan assembly 100 and improves the molding efficiency of the fan assembly 100.

[0132] In the present application, the fifth shell 115 and the sixth shell 116 can be made of high-temperature-resistant materials and can be installed in special environments of water heaters. For example, the fifth shell 115 and the sixth shell 116 can be formed by die casting, and the formed fifth shell 115 and the sixth shell 116 are connected together, i.e., the original multiple sheet metals are simplified to form a shell composed of two parts, which simplifies the process flow and reduces the processing cost.

[0133] In addition, at least one of the fifth shell 115 and the sixth shell 116 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to make glass fiber reinforced thermosetting products, which can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0134] In addition, at least one of the fifth shell 115 and the sixth shell 116 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to make glass fiber reinforced thermosetting products, which can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0135] In addition, the fifth shell 115 and the sixth shell 116 are connected by a connecting piece. Specifically, the connecting piece can be a bolt, and in other embodiments, the connecting piece can be a wire or the like for connection. The fifth shell 115 and the sixth shell 116 are provided with connecting pieces, so that the connection between the fifth shell 115 and the sixth shell 116 is more stable, and the connection stability of the fifth shell 115 and the sixth shell 116 is strengthened. The sealing effect of the connection between the fifth shell 115 and the sixth shell 116 is better. The fifth shell 115 and the sixth shell 116 can also be connected by gluing.

[0136] In addition, at least one of the fifth shell 115 and the sixth shell 116 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to make glass fiber reinforced thermosetting products, which can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0137] In addition, at least one of the fifth shell 115 and the sixth shell 116 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to make glass fiber reinforced thermosetting products, which can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0138] In addition, at least one of the fifth shell 115 and the sixth shell 116 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to make glass fiber reinforced thermosetting products, which can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 200-280℃, and it can be used at a temperature of 130℃ for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0139] As shown in FIG. 6, the air pipe 51 includes a third pipe portion 513 and a fourth pipe portion 514 connected along an axis, and the third pipe portion 513 is integrally formed with at least a portion of the fan shell 10. Optionally, the blade 52 can be provided on the third pipe portion 513. The blade 52 can also be provided on the fourth pipe portion 514. The blade 52 can also be provided between the third pipe portion 513 and the fourth pipe portion 514.

[0140] Example one, 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 axis of the volute air duct 101, the volute air duct 101 is arranged between the first housing 111 and the second housing 112, wherein the third pipe part 513 is integrally formed with the first housing 111; or the third pipe part 513 is integrally formed with the second housing 112. The assembly and structure of the first housing 111 and the second housing 112 can refer to the first embodiment.

[0141] Example two, 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 a predetermined direction, the volute air duct 101 is arranged between the third housing 113 and the fourth housing 114, the predetermined direction is perpendicular to the axis of the volute outlet 1012 and the axis of the volute air duct 101, wherein the third pipe part 513 is integrally formed with the third housing 113; or the third pipe part 513 is integrally formed with the fourth housing 114. The assembly and structure of the third housing 113 and the fourth housing 114 can refer to the first embodiment.

[0142] Example three, as shown in FIG. 6, the fan housing 10 includes a fifth housing 115 and a sixth housing 116, the fifth housing 115 and the sixth housing 116 are connected along the axis of the volute outlet 1012, the volute air duct 101 is arranged between the fifth housing 115 and the sixth housing 116, wherein the third pipe part 513 is integrally formed with the fifth housing 115. The assembly and structure of the fifth housing 115 and the sixth housing 116 can refer to the first embodiment.

[0143] Example three

[0144] The air pipe 51 is integrally formed with at least a part of the fan housing 10, and the blade 52 is arranged in the air pipe 51.

[0145] Example one, 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 axis of the volute air duct 101, the volute air duct 101 is arranged between the first housing 111 and the second housing 112, wherein the third pipe part 513 is integrally formed with the first housing 111; or the third pipe part 513 is integrally formed with the second housing 112. The assembly and structure of the first housing 111 and the second housing 112 can refer to the first embodiment.

[0146] In the second example, the fan housing 10 comprises a third housing 113 and a fourth housing 114, the third housing 113 and the fourth housing 114 are connected along a predetermined direction, the volute air duct 101 is arranged between the third housing 113 and the fourth housing 114, the predetermined direction is perpendicular to the axis of the volute outlet 1012 and the axis of the volute air duct 101, wherein the air pipe 51 is integrally formed with the third housing 113; or the air pipe 51 is integrally formed with the fourth housing 114. The assembly and structure of the third housing 113 and the fourth housing 114 can refer to the first example.

[0147] In the third example, the fan housing 10 comprises a fifth housing 115 and a sixth housing 116, the fifth housing 115 and the sixth housing 116 are connected along the axis of the volute outlet 1012, the volute air duct 101 is arranged between the fifth housing 115 and the sixth housing 116, wherein the air pipe 51 is integrally formed with the fifth housing 115. The assembly and structure of the fifth housing 115 and the sixth housing 116 can refer to the first example.

[0148] In addition, the integral molding in the foregoing examples can be integral plastic molding, such as integral injection molding, integral vacuum molding, etc. By integral molding of the plastic part, the molding process can be simplified, the production and assembly of the fan assembly 100 can be simplified, the production cost can be reduced and the efficiency can be improved. Moreover, the sealing effect can also be optimized, thereby improving the stability and service life of the fan assembly 100.

[0149] In some examples, the fan housing 10 and / or the air pipe 51 can be configured as a high-temperature-resistant shell. It can be installed in the special environment of the water heater. In addition, the fan housing 10 and / or the air pipe 51 can also be provided as a plastic shell, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. The fan housing 10 and / or the air pipe 51 can also be a BMC shell. BMC is essentially a semi-dry process for manufacturing glass fiber reinforced thermosetting products. It can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, with a heat distortion temperature HDT of 200-280°C, and it can be used at a temperature of 130°C for a long time. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0150] Of course, the fan housing 10 and / or the air pipe 51 of the present application can also be provided as other forms of shells, for example, the fan housing 10 can also be provided as a resin shell.

[0151] In some embodiments, the vane 52 is rotatably connected with the air duct 51, and when the air pressure inside the volute air duct 101 is higher than the air pressure outside the fan assembly 100 by a predetermined value, the vane 52 is in the first position and opens the air duct 51; when the air pressure inside the volute air duct 101 is not higher than the air pressure outside the fan assembly 100, the vane 52 is in the second position and closes the air duct 51. In this way, the vane 52 can have a certain opening pressure to facilitate smooth smoke exhaust, and the opening pressure can be a value suitable for the weight and rotational resistance of the vane 52.

[0152] As shown in FIGS. 7-9, the anti-freezing device 50 further includes a seat body 53 connected with the air duct 51, and the seat body 53 is provided with an air opening. The seat body 53 can provide support for the vane 52 to facilitate rotation of the vane 52 to open and close the air duct 51; the anti-freezing device 50 further includes a rotating shaft 54 connected with the seat body 53, and the vane 52 is connected with the rotating shaft 54 and rotatable about the rotating shaft 54, and the vane 52 opens the air opening in the first position and closes the air opening in the second position. The vane 52 can be rotatably connected with the rotating shaft 54; alternatively, the vane 52 can be relatively stationary with respect to the rotating shaft 54, and the rotating shaft 54 can be rotatably connected with the seat body 53. This can facilitate opening and closing of the air duct 51 by the vane 52, simplify the structure of the anti-freezing device 50, and improve the stability of the anti-freezing device 50.

[0153] Optionally, as shown in FIGS. 8 and 9, the seat body 53 includes an annular rib 531 arranged inside the air duct 51 along the peripheral wall of the air duct 51, and a strip-shaped rib 532 having two ends respectively connected with opposite sides of the annular rib 531, and the strip-shaped rib 532 divides the annular rib 531 into a first air opening 501 and a second air opening 502. The vane 52 includes a first vane 521 and a second vane 522, the first vane 521 is connected with the rotating shaft 54 and rotatable to open and close the first air opening 501, and the second vane 522 is connected with the rotating shaft 54 and rotatable to open and close the second air opening 502. The first air opening 501 and the second air opening 502 are formed by the annular rib 531 and the strip-shaped rib 532, which can facilitate opening and closing of the vane 52 and solve the problem of interference between the vane 52 and the air duct 51.

[0154] The rotating shaft 54 and the strip-shaped rib 532 are opposite along the air duct 51 axis, and the strip-shaped rib 532 can be used to block the airflow from passing through the gap between the first vane 521 and the second vane 522 when the vane 52 is not opened, which can improve the anti-freezing effect and structural stability of the anti-freezing device 50.

[0155] Optionally, as shown in FIG. 8 and FIG. 9, the outer circumferential surface of the annular rib 531 is provided with a clearance slot 503, the end of the rotating shaft 54 is arranged in the annular rib 531 and located in the clearance slot 503, so that the interference between the rotating shaft 54 and the air duct 51 can be avoided, and during the assembly process, the seat body 53 and the air duct 51 can be assembled together, so that the assembly efficiency and stability of the anti-freezing device 50 can be improved.

[0156] Optionally, as shown in FIG. 9, the outer circumferential surface of the annular rib 531 is provided with a first flange portion 504, the first flange portion 504 is sleeved on the inner side surface of the air duct 51, so that the assembly stability and structural strength between the seat body 53 and the air duct 51 can be improved, and the problems such as overturning of the seat body 53 can be avoided. In addition, the inner circumferential surface of the first air port 501 and the inner circumferential surface of the second air port 502 are provided with a second flange, and the blade 52 is supported on the second flange at the second position. The stable cooperation between the blade 52 and the seat body 53 can be facilitated, so that the sealing performance between the blade 52 and the seat body 53 can be improved when the blade 52 closes the first air port 501 and the second air port 502. In addition, the first sub-blade 521 is provided with a first recess portion, and the first recess portion can be embedded into the first air port 501; the second sub-blade 522 is provided with a second recess portion, and the second recess portion can be embedded into the second air port 502.

[0157] In addition, the seat body 53 further comprises a blocking rib 533, and the blocking rib 533 is arranged to limit the rotation angle of the first sub-blade 521 and the second sub-blade 522. Specifically, the blocking rib 533 is arranged at the rotation track of the first sub-blade 521 and the second sub-blade 522, that is, when the first sub-blade 521 is turned to a predetermined angle, the blocking rib 533 will limit the first sub-blade 521 from continuing to rotate, so as to avoid that the first sub-blade 521 cannot return to the closed position due to the excessively large rotation angle. In addition, when the second sub-blade 522 is turned to a predetermined angle, the blocking rib 533 will limit the second sub-blade 522 from continuing to rotate, so as to avoid that the second sub-blade 522 cannot return to the closed position due to the excessively large rotation angle. Optionally, the blocking rib 533 is arranged above the rotating shaft 54; or the blocking rib 533 is arranged above the strip-shaped rib 532. Optionally, the rotation angle of the first sub-blade 521 and the second sub-blade 522 is not greater than °; or when the first sub-blade 521 and the second sub-blade 522 contact the blocking rib 533, the angle between the first sub-blade 521 and the second sub-blade 522 and the horizontal plane is maintained to be less than 90° during the rotation process.

[0158] In some embodiments, the air duct 51 extends in the up-down direction, and the lower end is connected to the fan housing 10. When the air pressure in the volute air duct 101 is not higher than the external air pressure of the fan assembly 100, the blade 52 is supported on the seat body 53. The smoke exhaust can be facilitated, and the possibility of air flow backflow can be reduced.

[0159] As shown in FIG. 10, the gas water heater 1000 according to the embodiment of the present application includes the aforementioned fan assembly 100 and the combustion chamber 200, the combustion chamber 200 is connected with the fan assembly 100 and communicates with the volute inlet 1011 of the volute air duct 101. Wherein, the combustion chamber 200 can be provided with a burner, the burner can produce flue gas during combustion, under the suction 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 fan assembly 100 in the present application has small air resistance and is easy to form, which can improve the production efficiency of the fan assembly 100 while ensuring the flue gas flow.

[0160] In some embodiments, the combustion chamber 200 and the fan assembly 100 are distributed along the left-right direction, and the left-right direction is parallel to the axis of the volute air duct 101. The flue gas resistance can be reduced, the smoke exhaust performance can be improved, so as to provide a better combustion environment for the combustion chamber 200, realize full combustion of the gas, save energy and protect the environment. For example, the air inlet duct 102 can be arranged above the combustion chamber 200.

[0161] Optionally, the fan housing 10 includes a smoke collecting hood 12, the air inlet duct 102 is constructed in the smoke collecting hood 12, the air inlet duct 102 communicates with the volute air duct 101, and the air inlet duct 102 is arranged above the combustion chamber 200. The smoke collecting hood 12 can be used to collect flue gas and realize smoke exhaust, thereby improving the safety and stability of the gas water heater 1000.

[0162] At present, the water heater is a household appliance commonly used in people's daily life. The water heater is divided into types such as gas water heater and electric water heater, among which the gas water heater is widely used because of its convenient use. The conventional gas water heater usually includes a burner, a combustion chamber, a heat exchanger and a smoke collecting hood, etc. The burner burns gas in the combustion chamber to heat the water flowing through the heat exchanger, and the flue gas is discharged to the outdoor through the fan in the smoke collecting hood.

[0163] As shown in FIG. 11, the present application also provides another embodiment of a gas water heater 100, which can include a combustion chamber 200, the combustion chamber 200 can be provided with a burner, the burner can be arranged to heat by using gas, specifically, the burner can be supplied with gas, and the burner can heat the heat exchanger arranged in the combustion chamber 200 by using the gas, so as to heat the fluid passing through the heat exchanger, thereby realizing the heating of the fluid.

[0164] In addition, the gas water heater 1000 can further include a fan assembly 100. The fan assembly 100 can be the fan assembly 100 in the foregoing embodiments or other fan assemblies in the related art. The fan assembly 100 is connected to the combustion chamber 200 and is used for discharging smoke from the combustion chamber 200. In use, the smoke generated by the combustion chamber 200 can be discharged by the airflow driving action of the fan assembly 100, so as to improve the safety and combustion efficiency of the gas water heater 1000. In addition, at least a part of the fan assembly 100 is located outside the combustion chamber 200 in the horizontal projection (i.e., the projection on the water surface in the up-down direction).

[0165] According to the gas water heater 1000 in the embodiments of the present application, the part of the fan assembly 100 is arranged outside the combustion chamber 200, so as to reduce the part of the fan assembly 100 overlapping with the combustion chamber 200 in the horizontal projection, thereby reducing the size of the fan assembly 100 in the up-down direction, reducing the height of the gas water heater, and further reducing the volume of the gas water heater 1000 and improving the integration of the gas water heater 1000. In addition, the arrangement of the devices in the gas water heater 1000 can be more compact.

[0166] As shown in FIG. 11, in some embodiments, the fan assembly 100 is connected to the upper end of the combustion chamber 200, and the combustion chamber 200 is provided with a containing space 301 below the fan assembly 100. The fan assembly 100 can be extended to the side of the combustion chamber 200, and the containing space 301 can be constructed on the side of the combustion chamber 200, so as to facilitate the arrangement of the devices in the gas water heater 1000. In addition, the arrangement of the devices in the gas water heater 1000 can be facilitated, the arrangement of the devices in the gas water heater 1000 can be optimized, and the integration of the gas water heater 1000 can be improved.

[0167] Specifically, the gas water heater 1000 can further include functional devices. The functional devices can be arranged in the containing space 301.

[0168] For example, as shown in FIG. 11, in some examples, the gas water heater 1000 can further include an electric control assembly 400 arranged in the containing space 301. The gas water heater 1000 can further include a casing 300. The combustion chamber 200 and the fan assembly 100 can be arranged in the casing 300. The casing 300 can be provided with a mounting seat arranged in the casing 300 and located in the containing space 301. The electric control assembly 400 can be mounted on the mounting seat, so as to realize stable mounting of the electric control assembly 400.

[0169] As shown in FIG. 12 and FIG. 17, in some examples, the gas water heater 1000 further comprises a water inlet pipe 601 and a water outlet pipe 602, at least one of the water inlet pipe 601 and the water outlet pipe 602 is arranged in the accommodating space 301. Specifically, a heat exchanger can be arranged in the combustion chamber 200, the water inlet pipe 601 and the water outlet pipe 602 can be connected to the heat exchanger, the water inlet pipe 601 is used to pass water into the heat exchanger, and the water outlet pipe 602 is used to discharge water in the heat exchanger. Wherein, the water inlet pipe 601 and the water outlet pipe 602 can be arranged on the outside of the combustion chamber 200, the water inlet pipe 601 and the water outlet pipe 602 can be arranged on the same side of the combustion chamber 200 along the left-right direction, at this time, the water inlet pipe 601 and the water outlet pipe 602 can be arranged in the accommodating space 301; or, the water inlet pipe 601 can be arranged on one side of the combustion chamber 200, and the water outlet pipe 602 can be arranged on the other side of the combustion chamber 200, wherein one of the water inlet pipe 601 and the water outlet pipe 602 can be arranged in the accommodating space 301.

[0170] In addition, as shown in FIG. 13, the gas water heater 1000 in the present application can further comprise a water inlet valve 603 and / or a water outlet valve 604, wherein the water inlet valve 603 and / or the water outlet valve 604 can also be arranged in the accommodating space 301. Thus, the devices in the gas water heater 1000 can be accommodated in the accommodating space 301, so as to facilitate the assembly and maintenance of the gas water heater 1000, and improve the structural stability of the gas water heater 1000, and facilitate the assembly and maintenance.

[0171] In another embodiment of the present application, the fan assembly 100 is connected to the lower end of the combustion chamber 200, and the accommodating space 301 is arranged above the fan assembly 100 on the side of the combustion chamber 200.

[0172] As shown in FIG. 12 and FIG. 17, the fan assembly 100 of the embodiment of the present application can comprise a fan housing 10, an impeller device 30 and a motor device 40, a volute air duct 101 connected to the combustion chamber 200 is constructed in the fan housing 10, the impeller device 30 is arranged in the fan housing 10, and the motor device 40 is drivingly connected with the impeller device 30. The motor device 40 can drive the impeller device 30 to rotate, and the rotation of the impeller device 30 can drive the airflow in the volute air duct 101, wherein the airflow can flow from the inlet to the outlet of the volute air duct 101, so as to realize the smoke exhaust in the gas water heater 1000 by using the fan assembly 100. Wherein, at least a part of the fan housing 10 is located outside the combustion chamber 200 in the horizontal projection, which can facilitate reducing the size of the fan housing 10 along the up-down direction, thereby reducing the size of the gas water heater 1000 and improving the integration of the gas water heater 1000.

[0173] In some embodiments, as shown in FIG. 12 and FIG. 13, the fan assembly 100 comprises a fume hood 12 and a volute 11, one end of the fume hood 12 covers the combustion chamber 200, preferably, the one end of the fume hood 12 covers the top of the combustion chamber 200, for collecting the flue gas generated during the heating process of the combustion chamber 200. The other end of the fume hood 12 is communicated with the volute 11, and the impeller device 30 is arranged in the volute 11. During the rotation of the impeller device 30, negative pressure is generated at the inlet of the volute 11, which is transmitted to the fume hood 12, thereby facilitating the fume hood 12 to collect flue gas. In the water projection, the volute 11 is arranged at the end of the combustion chamber 200. The impeller device 30 will suck flue gas from the end of the combustion chamber 200, wherein the flue gas can be arranged to flow into the fume hood 12 from bottom to top, and then converge through the fume hood 12 towards the volute 11 located at the end of the combustion chamber 200, and finally sent out through the outlet of the volute 11. By arranging the volute 11 at the end of the combustion chamber 200, compared with the scheme that the volute 11 is arranged above the combustion chamber 200, the size of the gas water heater in the up-down direction can be reduced, thereby fully utilizing the space on the side of the combustion chamber 200 and improving the space utilization.

[0174] Optionally, at least a portion of the volute 11 is arranged outside the combustion chamber 200 in the horizontal projection, and the lower end is lower than the upper edge of the combustion chamber. Thus, the height of the volute 11 can be further reduced, thereby reducing the height of the fan assembly 100, and further reducing the size of the gas water heater 1000 in the up-down direction, and improving the space utilization of the gas water heater 1000. Optionally, a portion of the volute 11 overlaps with the combustion chamber 200 in the horizontal projection, and another portion is arranged outside the combustion chamber 200,

[0175] Optionally, as shown in FIG. 11 to FIG. 13, the axis of the volute 11 is arranged to be inclined upward in the direction from the fume hood 12 to the volute 11, wherein the volute 11 is arranged to intake air in the axial direction, and the inlet of the volute 11 is arranged on the end plate of the volute 11. The inlet of the volute 11 is arranged to extend in the same direction as the axis, that is, the inlet of the volute 11 faces the combustion chamber and is inclined upward in the direction from the fume hood 12 to the volute 11, thereby reducing the corner during the flue gas flow, thereby reducing the air resistance in the volute air duct 101, and facilitating the flue gas to flow into the volute.

[0176] The top wall of the smoke hood 12 is inclined upward in the direction from the smoke hood 12 to the volute 11, and is connected to the volute 11. Optionally, the extension direction of the top wall of the smoke hood 12 is the same as the extension direction of the axis of the volute 11. By setting any of the above forms, the smoke discharge can be facilitated. Specifically, under the action of the negative pressure generated by the impeller device 30 and the spontaneous upward flow of the high-temperature smoke in the combustion chamber 200, the smoke generated during the heating process of the combustion chamber 200 will flow into the smoke hood 12. By setting the top wall of the smoke hood 12 to be inclined, the smoke flowing into the smoke hood 12 will flow to the volute 11 under the guide of the top wall of the smoke hood 12, and then flow into the volute 11 through the inlet of the volute 11. Under the action of the impeller device 30, the smoke can be discharged through the outlet. By setting the top wall of the smoke hood 12 to be inclined and / or the axis of the volute 11 to be inclined, the smoke can be conveniently guided, the resistance in the flow process of the smoke is reduced, and the occurrence of turbulence and other phenomena is avoided, thereby effectively improving the smoke discharge efficiency and effect of the fan assembly 100, and improving the performance of the gas water heater 1000.

[0177] Optionally, the inclination angle of the axis of the volute 11 with respect to the up-down direction is greater than 0° and less than 90°. Preferably, the inclination angle of the axis of the volute 11 with respect to the up-down direction is greater than or equal to 200° and less than or equal to 60°. For example, the inclination angle of the axis of the volute 11 with respect to the up-down direction can be set to 15°, 25°, 200°, 46°, 60°, 65°, or 79°, etc.

[0178] As shown in FIG. 11, in some embodiments, the inlet and outlet of the volute 11 are arranged above the combustion chamber 200; and / or, one end of the smoke hood 12 is arranged above the combustion chamber 200, and the other end is connected to the end plate of the volute 11 and surrounds the inlet of the volute 11. Specifically, the volute 11 has a first end plate, a second end plate, and a peripheral wall, wherein the first end plate and the second end plate are arranged along the axis of the volute 11, and the first end plate faces the smoke hood 12, and the inlet of the volute 11 is arranged on the first end plate; the outlet of the volute 11 is arranged on the peripheral wall of the volute 11. By arranging the inlet of the volute 11 above the combustion chamber 200, the smoke hood 12 can be connected to the first end plate of the volute 11 and the inlet arranged on the first end plate, thereby reducing the flow path of the smoke and reducing the wind resistance. In addition, the volute 11 can be arranged to guide the axial air inlet to be discharged radially through the rotation of the impeller device 30. By arranging the outlet of the volute 11 above the combustion chamber 200, the smoke can be conveniently discharged, thereby optimizing the smoke discharge efficiency and effect of the fan assembly 100. In addition, the smoke hood 12 is connected to the first end plate of the volute 11 and surrounds the inlet of the volute 11, which can facilitate the discharge of the smoke in the smoke hood 12 into the volute 11, and can reduce the volume of the fan assembly 100 and improve the space utilization.

[0179] In some embodiments, the inlet axis of the fume hood 12 is arranged to extend in the up-down direction. The fume hood 12 can be conveniently connected to the combustion chamber 200, so that the flue gas in the combustion chamber 200 flows into the fume hood 12, facilitating the flue gas discharge.

[0180] In some embodiments, the fan housing 10 further comprises a flue gas discharge pipe 13 connected to the outlet of the volute 11. Through the flue gas discharge pipe 13, the flue gas in the fan housing 10 can be conveniently discharged, improving the flue gas discharge efficiency and effect of the fan assembly 100 and optimizing the performance of the fan assembly 100.

[0181] Optionally, the flue gas discharge pipe 13 is arranged to extend in the up-down direction. In addition, the flue gas discharge pipe 13 can further have a transition section and an air outlet section, the air outlet section extending in the up-down direction, and one end of the transition section being connected to the volute 11 and communicating with the outlet of the volute 11, and the other end being connected to the air outlet section. Thus, the air resistance can be further reduced, and the flue gas discharge efficiency can be improved.

[0182] In some embodiments, the fan assembly 1000 comprises a fan housing 10 and an impeller device 30, the fan housing 10 is provided with a volute air duct 101, and is provided with a volute inlet 1011 and a volute outlet 1012, the volute air duct 101 being arranged between the volute inlet 1011 and the volute outlet 1012. The impeller device 30 is arranged in the volute air duct 101, and the impeller device 30 is rotatable, and can drive the airflow to flow from the volute inlet 1011 to the volute outlet 1012 by rotating to achieve the driving of the airflow. The fan assembly 1000 further comprises 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 a mounting cavity, and the motor device 40 is arranged in the mounting cavity. The motor device 40 comprises a motor stator 41 and a motor rotor 42, the motor rotor 42 is in rotational cooperation with the motor stator 41, the motor stator 41 is connected to the motor housing 20 and is relatively stationary, and the motor rotor 42 is drivingly connected to the impeller device 30. According to the fan assembly 1000 of the embodiments of the present application, the motor housing 20 is connected to the fan housing 10, which can simplify the structure of the fan assembly 1000, facilitate the manufacturing and production of the fan assembly 1000, and the like. In addition, the motor rotor 42 is connected to the impeller device 30, which can drive the motor rotor 42 to rotate by using the motor stator 41, so as to drive the impeller device 30 to rotate by using the motor rotor 42, thereby achieving the driving of the airflow.

[0183] In some embodiments, the fan assembly 100 comprises a seventh housing 117 and an eighth housing 118, the seventh housing 117 and the eighth housing 118 are connected and construct the volute air duct 101. The connection structure of the seventh housing 117 and the eighth housing 118 includes but is not limited to the following embodiments.

[0184] Embodiment one

[0185] As shown in FIG. 14, the seventh shell 117 and the eighth shell 118 are connected along the axial direction of the impeller device 30.

[0186] Optionally, the seventh shell 117 comprises a first sub-shell and a third sub-shell, and the eighth shell 118 comprises a second sub-shell and a fourth sub-shell, the first sub-shell and the second sub-shell are cooperatively configured to form the volute 11, and the outlet of the volute 11 is arranged between the third sub-shell and the fourth sub-shell. The first sub-shell can comprise a first side plate and a first end plate, the first side plate can be configured as a cylindrical shape, and the first end plate is connected to one side edge of the first side plate; the second sub-shell can comprise a second side plate and a second end plate, the second side plate can be configured as a cylindrical shape, and the second end plate is connected to one side edge of the second side plate. The other side edge of the first side plate and the other side edge of the second side plate are connected to form the volute 11. The third sub-shell is connected to the first side plate, and the fourth sub-shell is connected to the second side plate, and the third sub-shell and the fourth sub-shell are connected to form the outlet of the volute 11.

[0187] In addition, the fan shell 10 is further provided with an air inlet duct 102, the air inlet duct 102 is arranged in the seventh shell 117, the first end plate can be provided with the inlet of the volute 11, and the seventh shell 117 can further comprise a third side plate, the third side plate is configured as the fume hood 12, the air inlet duct 102 is formed in the inside of the fume hood 12, and the third side plate can be connected with the first end plate. The third side plate can be configured as a cylindrical shape, a square cylindrical shape, a triangular cylindrical shape or other shapes. In the assembly process of the fan assembly 100, the impeller device 30 can be installed in the volute 11, and the volute 11 is formed by splicing the seventh shell 117 and the eighth shell 118, which can facilitate the installation of the impeller device 30, and the impeller device 30 can be supported by the second end plate. Through this arrangement, the installation efficiency of the impeller device 30 can be improved.

[0188] Embodiment two

[0189] As shown in FIG. 15, the seventh shell 117 and the eighth shell 118 are connected along a predetermined direction, the seventh shell 117 comprises a fifth sub-shell and a seventh sub-shell, the eighth shell 118 comprises a sixth sub-shell and an eighth sub-shell, the fifth sub-shell and the sixth sub-shell are cooperatively configured to form the volute 11, and the outlet of the volute 11 is arranged between the seventh sub-shell and the eighth sub-shell, and the predetermined direction is perpendicular to the axial direction of the outlet of the volute 11 and the axis of the impeller device 30.

[0190] The fifth sub-shell can include a third end plate, a fourth end plate and a fourth side plate, the sixth sub-shell can include a fifth end plate, a sixth end plate and a fifth side plate, the fourth side plate is connected between the third end plate and the fourth end plate, the fifth side plate is connected between the fifth end plate and the sixth end plate, the third end plate and the fifth end plate are connected into a flat plate, the fourth end plate and the sixth end plate are connected into a flat plate, the fourth side plate and the fifth side plate are connected into a surrounding plate, the third end plate, the fourth end plate, the fourth side plate, the fifth end plate, the sixth end plate and the fifth side plate are matched to form the volute 11. The seventh sub-shell is connected to the fourth side plate, the eighth sub-shell is connected to the fifth side plate, the seventh sub-shell and the eighth sub-shell are connected and the outlet of the volute 11 is formed.

[0191] In addition, the fan housing 10 is further provided with an air inlet duct 102, the third end plate and the fourth end plate form the inlet of the volute 11, the seventh shell 117 further includes a sixth side plate, the eighth shell 118 further includes a seventh side plate, the sixth side plate can be connected to the third end plate, the seventh side plate can be connected to the fifth end plate, and the sixth side plate and the seventh side plate can be configured into a smoke hood 12, the air inlet duct 102 is formed inside the smoke hood 12, and the smoke hood 12 can be cylindrical, square cylindrical, triangular cylindrical or other shapes. In the assembly process of the fan assembly 100, the impeller device 30 can be installed in the volute 11, and the volute 11 is formed by splicing the seventh shell 117 and the eighth shell 118, which can facilitate the installation of the impeller device 30, and the fourth end plate and the sixth end plate can be matched to support the impeller device 30. Through this arrangement, the installation efficiency of the impeller device 30 can be improved.

[0192] Embodiment three

[0193] As shown in FIG. 16, the seventh shell 117 and the eighth shell 118 are connected along the axis direction of the outlet of the volute 11, the seventh shell 117 includes a ninth sub-shell and a tenth sub-shell, the ninth sub-shell is matched with the eighth shell 118 to form the volute 11, and the tenth sub-shell surrounds the outlet of the volute 11.

[0194] The ninth sub-shell can include a seventh end plate, an eighth end plate and an eighth side plate, the eighth shell 118 can include a ninth end plate, a tenth end plate and a ninth side plate, the eighth side plate is connected between the seventh end plate and the eighth end plate, the ninth side plate is connected between the ninth end plate and the tenth end plate, the seventh end plate and the ninth end plate are connected into a flat plate, the eighth end plate and the tenth end plate are connected into a flat plate, the eighth side plate and the ninth side plate are connected into a surrounding plate, and the seventh end plate, the eighth end plate, the eighth side plate, the ninth end plate, the tenth end plate and the ninth side plate are matched to form the volute 11. The eighth shell 118 is connected to the eighth side plate, and the inside of the tenth sub-shell surrounds the outlet of the volute 11.

[0195] In addition, the fan shell 10 is further provided with an air inlet duct 102, and the inlet of the volute 11 is formed between the seventh end plate and the ninth end plate. The seventh shell 117 further comprises a tenth side plate, and the eighth shell 118 further comprises an eleventh side plate. The tenth side plate can be connected to the seventh end plate, and the eleventh side plate can be connected to the ninth end plate. The tenth side plate and the eleventh side plate can be configured as a fume hood 12. The fume hood 12 is internally configured as the air inlet duct 102, and the fume hood 12 can be cylindrical, square, triangular or other shapes. During the assembly of the fan assembly 100, the impeller device 30 can be installed in the volute 11, and the volute 11 can be formed by splicing the seventh shell 117 and the eighth shell 118. This can facilitate the installation of the impeller device 30, and the eighth end plate and the tenth end plate can be used to support the impeller device 30. Through this arrangement, the installation efficiency of the impeller device 30 can be improved.

[0196] In some embodiments of the present application, the seventh shell 117 is configured as an integral molding. Through integral molding, the processing efficiency of the seventh shell 117 can be improved, the processing cost of the seventh shell 117 can be reduced, and the seventh shell 117 can have higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the fan assembly 100. In addition, the eighth shell 118 can also be configured as an integral molding. When the seventh shell 117 and the eighth shell 118 are both configured as an integral molding structure, the service life and energy efficiency of the fan assembly 100 can be further improved, and stress concentration at the connection between the seventh shell 117 and the eighth shell 118 due to thermal expansion and contraction can be avoided.

[0197] At least one of the seventh shell 117 and the eighth shell 118 in the present application can be a plastic shell, which can further improve the processing efficiency of the fan assembly 100 and reduce the cost of the fan assembly 100. In addition, as described above, the air duct structure is formed by connecting the seventh shell 117 and the eighth shell 118 in the front-rear direction. This can simplify the structure of the seventh shell 117 and the eighth shell 118, making it easier to mold plastic, thereby effectively reducing the cost of the fan assembly 100 and improving the molding efficiency of the fan assembly 100.

[0198] In the present application, the seventh shell 117 and the eighth shell 118 can be made of high-temperature-resistant materials and can be installed in special environments of water heaters. For example, the seventh shell 117 and the eighth shell 118 can be formed by die casting, and the seventh shell 117 and the eighth shell 118 are connected after molding, i.e., the original multiple sheet metals are simplified to form a shell composed of two parts, thereby simplifying the process flow and reducing the processing cost.

[0199] In addition, at least one of the seventh shell 117 and the eighth shell 118 can be configured as a BMC shell. BMC is essentially a kind of semi-dry process to manufacture glass fiber reinforced thermosetting products. It can be molded and injection molded, and its heat resistance is better than that of general engineering plastics, and its heat distortion temperature HDT is 120-140 DEG C. Therefore, when the shell made of BMC material is installed in the water heater, it will not melt due to overheating.

[0200] In addition, at least one of the seventh shell 117 and the eighth shell 118 can also be made of metal material.

[0201] In addition, the seventh shell 117 and the eighth shell 118 can be connected by glue. The seventh shell 117 and the eighth shell 118 can be connected by glue. The above connection method is relatively simple and convenient to operate.

[0202] In the description of the present application, 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0203] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0204] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0205] In this application, unless otherwise explicitly specified and limited, a first feature is "on", "above", or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact with an intermediate medium. Moreover, the first feature "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "below", "under", and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0206] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means 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 application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0207] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A fan assembly, wherein, The application relates to an anti-freezing device for a fan housing. The anti-freezing device comprises a wind pipe and a vane, the wind pipe is connected with the fan housing and communicates with the volute outlet, at least a part of the wind pipe is integrally formed with the fan housing, and the vane is connected with the wind pipe and is configured to be opened in one direction along the air outlet direction of the volute air duct. The wind pipe comprises a first pipe part and a second pipe part which are connected in a radial direction, the first pipe part and the second pipe part enclose the wind pipe, and the vane is arranged between the first pipe part and the second pipe part.

2. The fan assembly of claim 1, wherein, The first pipe part is integrally formed with at least a part of the fan housing, and / or the second pipe part is integrally formed with at least a part of the fan housing. The fan housing comprises a first housing and a second housing which are connected along the axis of the volute air duct, and the volute air duct is arranged between the first housing and the second housing, wherein the first pipe part is integrally formed with the first housing, and / or the second pipe part is integrally formed with the second housing.

3. The fan assembly of claim 2, wherein, The fan housing comprises a third housing and a fourth housing which are connected along a predetermined direction, the volute air duct is arranged between the third housing and the fourth housing, and the predetermined direction is perpendicular to the axis of the volute outlet and the axis of the volute air duct, wherein the first pipe part is integrally formed with the third housing, and / or the second pipe part is integrally formed with the fourth housing. The fan housing comprises a fifth housing and a sixth housing which are connected along the axis of the volute outlet, and the volute air duct is arranged between the fifth housing and the sixth housing, wherein one of the first pipe part and the second pipe part is integrally formed with the fifth housing. The wind pipe comprises a third pipe part and a fourth pipe part which are connected along an axis, the third pipe part is integrally formed with at least a part of the fan housing, and the vane is arranged in the third pipe part, arranged in the fourth pipe part or arranged between the third pipe part and the fourth pipe part.

4. The fan assembly of any one of claims 1-3, wherein, ​ The fan shell comprises a first shell and a second shell, the first shell and the second shell are connected along an axis of the volute air duct, the volute air duct is arranged between the first shell and the second shell, wherein the third pipe part is integrally formed with the first shell or the second shell; or the fan shell comprises a third shell and a fourth shell, the third shell and the fourth shell are connected along a predetermined direction, the volute air duct is arranged between the third shell and the fourth shell, the predetermined direction is perpendicular to the axis of the volute outlet and the axis of the volute air duct, wherein the third pipe part is integrally formed with the third shell or the fourth shell; or the fan shell comprises a fifth shell and a sixth shell, the fifth shell and the sixth shell are connected along the axis of the volute outlet, the volute air duct is arranged between the fifth shell and the sixth shell, wherein the third pipe part is integrally formed with the fifth shell.

5. The fan assembly of any one of claims 1-4, wherein, The fan shell is integrally formed with at least a part of the air pipe, and the blades are arranged in the air pipe. Or, the fan shell comprises a first shell and a second shell, the first shell and the second shell are connected along an axis of the volute air duct, the volute air duct is arranged between the first shell and the second shell, wherein the third pipe part is integrally formed with the first shell or the second shell; Or, the fan shell comprises a third shell and a fourth shell, the third shell and the fourth shell are connected along a predetermined direction, the volute air duct is arranged between the third shell and the fourth shell, the predetermined direction is perpendicular to the axis of the volute outlet and the axis of the volute air duct, wherein the third pipe part is integrally formed with the third shell or the fourth shell; Or, the fan shell comprises a fifth shell and a sixth shell, the fifth shell and the sixth shell are connected along the axis of the volute outlet, the volute air duct is arranged between the fifth shell and the sixth shell, wherein the third pipe part is integrally formed with the fifth shell.

6. The fan assembly of any one of claims 1-5, wherein, The fan shell is configured as a high-temperature-resistant shell, a plastic shell, a resin shell and / or a BMC shell; and / or, the air pipe is configured as a high-temperature-resistant shell, a plastic shell, a resin shell and / or a BMC shell.

7. The fan assembly of any one of claims 1-6, wherein, The blades are rotationally connected to the air pipe, and when the internal pressure of the volute air duct is higher than the external pressure of the fan assembly by a predetermined value, the blades are located at a first position and open the air pipe; when the internal pressure of the volute air duct is not higher than the external pressure of the fan assembly, the blades are located at a second position and close the air pipe.

8. The fan assembly of any one of claims 1-7, wherein, The anti-freezing device further comprises: a seat body connected to the air pipe, the seat body being provided with an air outlet; a rotating shaft connected to the seat body, the blades being connected to the rotating shaft and being rotatable about the rotating shaft, the blades opening the air outlet at a first position and closing the air outlet at a second position; The seat body comprises a ring-shaped rib and a strip-shaped rib. The ring-shaped rib is arranged in the air duct and is arranged along the peripheral wall of the air duct. The two ends of the strip-shaped rib are respectively connected to the opposite sides of the ring-shaped rib. The strip-shaped rib divides the ring-shaped rib into a first air port and a second air port. The blade comprises a first sub-blade and a second sub-blade. The first sub-blade is connected to the rotating shaft and is rotatable to open and close the first air port. The second sub-blade is connected to the rotating shaft and is rotatable to open and close the second air port.

9. The fan assembly of claim 8, wherein, The rotating shaft is opposite to the strip-shaped rib along the air duct axis. The outer peripheral surface of the ring-shaped rib is provided with a clearance groove. The end of the rotating shaft is arranged in the ring-shaped rib and is located in the clearance groove. The outer peripheral surface of the ring-shaped rib is provided with a first flanging portion. The first flanging portion is sleeved on the inner side surface of the air duct. The inner peripheral surface of the first air port and the inner peripheral surface of the second air port are provided with a second flanging portion. The blade is supported on the second flanging portion at the second position. The seat body further comprises a blocking rib. The blocking rib is configured to limit the rotation angle of the first sub-blade and the second sub-blade.

10. The fan assembly of any one of claims 8-9, wherein, The air duct extends in the up-down direction and the lower end is connected to the fan housing. When the air pressure in the volute air duct is not higher than the external air pressure of the fan assembly, the blade is supported on the seat body.

11. The fan assembly of any one of claims 1-10, wherein, The fan assembly is further provided with an air inlet air duct. The air inlet air duct is in communication with the volute air duct. The fan housing comprises a first housing and a second housing. The first housing and the second housing are connected along the axis of the volute air duct. The volute air duct is arranged between the first housing and the second housing. The air inlet air duct is arranged in the first housing. Alternatively, the fan housing comprises a third housing and a fourth housing. The third housing and the fourth housing are connected along a predetermined direction. The volute air duct and the air inlet air duct are arranged between the third housing and the fourth housing. The predetermined direction is perpendicular to the axis of the volute outlet and the axis of the volute air duct. Alternatively, the fan housing comprises a fifth housing and a sixth housing. The fifth housing and the sixth housing are connected along the axis of the volute outlet. The volute air duct and the air inlet air duct are arranged between the fifth housing and the sixth housing.

12. A gas water heater wherein, The fan assembly comprises: The fan assembly according to any one of claims 1-11; A combustion chamber is connected to the fan assembly and is in communication with the inlet of the volute air duct. The fan housing comprises a fume collecting hood. The air inlet air duct is formed in the fume collecting hood. The air inlet air duct is in communication with the volute air duct. The air inlet air duct is arranged above the combustion chamber.

13. A gas water heater wherein, The fan assembly comprises a combustion chamber and a fan assembly. The fan assembly is connected to the combustion chamber and is used for exhausting smoke from the combustion chamber. At least a part of the fan assembly is located outside the combustion chamber in the horizontal projection.

14. The gas water heater of claim 13, wherein, The fan assembly is connected to the upper end of the combustion chamber. The side of the combustion chamber is provided with a containing space located below the fan assembly.

15. The gas water heater of claim 14, wherein, The gas water heater further comprises an electric control assembly arranged in the accommodating space; and / or, the gas water heater further comprises a water inlet pipe and a water outlet pipe, at least one of which is arranged in the accommodating space; and / or, the gas water heater further comprises a water inlet valve arranged in the accommodating space. And / or, the gas water heater further comprises a water outlet valve arranged in the accommodating space.

16. The gas water heater according to any one of claims 13-15 wherein, The fan assembly is connected to the lower end of the combustion chamber, and the combustion chamber is provided with an accommodating space above the fan assembly.

17. The gas water heater according to any one of claims 13-16 wherein, The fan assembly comprises a fan housing, an impeller device and a motor device, the fan housing is internally formed with a volute air duct connected to the combustion chamber, the impeller device is arranged in the fan housing, and the motor device is drivingly connected to the impeller device, at least a part of the fan housing is located outside the combustion chamber in horizontal projection.

18. The gas water heater of claim 17, wherein, The fan housing comprises a fume collecting hood and a volute, one end of the fume collecting hood covers the combustion chamber, the other end of the fume collecting hood communicates with the volute, the impeller device is arranged in the volute, and the volute is arranged at the end of the combustion chamber in horizontal projection.

19. The gas water heater of claim 18, wherein, At least a part of the volute is arranged outside the combustion chamber in horizontal projection, and the lower end is lower than the upper edge of the combustion chamber; and / or, the axis of the volute is arranged to be upwardly inclined in the direction from the fume collecting hood to the volute; and / or, the top wall of the fume collecting hood is upwardly inclined in the direction from the fume collecting hood to the volute and is connected to the volute; And / or, the extension direction of the top wall of the fume collecting hood is the same as the extension direction of the axis of the volute; And / or, the inlet and outlet of the volute are arranged above the combustion chamber; And / or, the fume collecting hood is connected to the end plate of the volute and surrounds the inlet of the volute.

20. The gas water heater according to any one of claims 13-19 wherein, The fan assembly comprises: 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, at least a part of the motor housing is integrally formed with the fan housing, and the motor housing is provided with a mounting cavity; a motor device arranged in the mounting cavity, the motor device comprises a motor stator and a motor rotor, the motor rotor is in rotational cooperation with the motor stator, the motor stator is connected to the motor housing and is relatively stationary, and the motor rotor is drivingly connected to the impeller device.

21. The gas water heater of claim 20, wherein, The fan housing comprises a seventh housing and an eighth housing, the seventh housing and the eighth housing are connected and form the volute air duct.

22. The gas water heater of claim 21, wherein, The seventh housing and the eighth housing are connected along the axis of the fan housing; or, the seventh housing and the eighth housing are connected along a predetermined direction, the predetermined direction is perpendicular to the outlet axis of the fan housing and the axis of the fan housing; or, the seventh housing and the eighth housing are connected along the outlet axis of the fan housing.

23. The gas water heater according to claim 21 or 22, wherein, At least one of the seventh housing and the eighth housing is configured as a high-temperature-resistant housing, a plastic housing, a resin housing, and / or an EMC housing; and / or, the seventh housing is integrally formed; and / or, the eighth housing is integrally formed.

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