Fan impeller for low-noise gas water heater

Abstract

The utility model discloses a low-noise fan impeller for a gas water heater, which is assembled in a volute connected with a motor and comprises a first fixing plate, a second fixing plate and a plurality of impeller blades. The impeller blades are assembled between the first fixing plate and the second fixing plate, and vortex eliminating holes used for eliminating vortex are formed in the second fixing plate. The impeller of the fan is assembled in the volute connected with the motor, so that the impeller can stably and efficiently rotate under the driving of the motor; due to the design of the volute, airflow can be guided, the air volume and the air pressure can be improved, and noise can be reduced; the first fixing plate and the second fixing plate enable the impeller to be kept stable during rotation and not prone to deformation or damage; the vortex eliminating holes are formed in the second fixing plate, so that vortex formation can be effectively destroyed, noise is reduced, and the performance of the fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a fan impeller for a low-noise gas water heater. Background Art

[0002] At present, some gas water heaters on the market have high operating noise. The water heater noise mainly comes from fan noise, combustion noise and water flow noise in the heat exchanger, and the fan operation noise often accounts for a high proportion. Fan noise includes aerodynamic noise and mechanical noise. Aerodynamic noise is composed of two parts: periodic exhaust noise and eddy current noise. When the fan impeller operates under certain pressure conditions, it periodically squeezes the gas and collides with the gas molecules, causing the gas around the impeller to produce velocity and pressure pulsations, and radiate to the impeller in the form of sound waves, which produces periodic exhaust noise.

[0003] In the "impeller for a gas water heater fan" disclosed in the prior art, there are two identical bottom plates and multiple blades, and it is characterized by having four fixing elements; in the assembled state, the two identical bottom plates are opposite to each other, and the blades are embedded in the corresponding embedding grooves of the upper and lower bottom plates, and the fixing elements fix the blades and the two bottom plates to form an integrated impeller for a gas water heater fan. The above device has a simpler structure, higher assembly efficiency, lower cost, and more convenient storage and procurement, but when the impeller runs at high speed, a large number of gas vortices will form on its surface. When these gas vortices separate on the impeller surface, vortex noise will be generated, affecting the product experience effect. Summary of the invention

[0004] The utility model provides a fan impeller for a low-noise gas water heater which can eliminate eddy currents and reduce noise.

[0005] The technical solution of the utility model is as follows: a fan impeller for a low-noise gas water heater is assembled in a volute connected to a motor, and comprises a first fixed plate, a second fixed plate and a plurality of impeller blades; the plurality of impeller blades are assembled between the first fixed plate and the second fixed plate, and the second fixed plate is provided with a vortex elimination hole for eliminating vortex, an impeller center hole and a shaft sleeve mounting hole; the second fixed plate is mounted in the volute through the impeller center hole and the shaft sleeve mounting hole.

[0006] Preferably, the impeller center hole is opened at the center of the second fixed plate, and a plurality of vortex-eliminating holes are provided, and the plurality of vortex-eliminating holes are arranged circumferentially with the impeller center hole as the center.

[0007] Preferably, the vortex elimination hole is in a trapezoidal shape, with the narrow end of the trapezoid facing the central hole of the impeller.

[0008] Preferably, the trapezoidal corners of the vortex-eliminating hole are arc-shaped.

[0009] Preferably, the plurality of impeller blades are curved surfaces, and the plurality of impeller blades are fixed equidistantly between the first fixing plate and the second fixing plate by screws.

[0010] Preferably, a shaft sleeve for connection and fixation is provided between the second fixing plate and the motor.

[0011] Preferably, a plurality of shaft sleeve mounting holes are provided, and the plurality of shaft sleeve mounting holes are circumferentially arranged with the impeller center hole as the center.

[0012] Preferably, a sleeve center hole is provided at the center of the sleeve, and the sleeve is assembled on a motor shaft provided by the motor through the sleeve center hole.

[0013] Preferably, the shaft sleeve is provided with a plurality of bosses, which are arranged circumferentially with the central hole of the shaft sleeve as the center.

[0014] Preferably, a plurality of bosses are nested in a plurality of sleeve mounting holes.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] A low-noise fan impeller for a gas water heater is installed in a volute connected to a motor, which ensures that the impeller can rotate stably and efficiently under the drive of the motor. The design of the volute helps to guide the airflow, increase the air volume and air pressure, and also helps to reduce noise; the first fixing plate and the second fixing plate enable the impeller to remain stable during rotation and not easily deformed or damaged; by opening a vortex elimination hole on the second fixing plate, the formation of vortex can be effectively destroyed, thereby reducing noise and improving the performance of the fan.

[0017] Furthermore, the design of multiple vortex elimination holes also helps to increase the ventilation area of ​​the impeller, improve the smoothness of the airflow through the impeller, and reduce the airflow resistance, thereby further reducing noise and improving the efficiency of the fan. The vortex elimination holes are arranged circumferentially with the impeller center hole as the center. It can eliminate vortices more effectively. Since vortices are usually formed around rotating parts, by providing vortex elimination holes on the second fixed plate, the formation of vortices can be destroyed to prevent them from affecting the entire flow field.

[0018] Furthermore, the trapezoidal design makes the vortex elimination hole gradually narrow in the direction toward the center hole of the impeller, which helps to better guide the airflow, reduce the sudden changes of the airflow at the hole mouth, and reduce the noise generation; the trapezoidal structure can also effectively disperse the vortex energy, avoid the vortex from being too concentrated in a local area, and further reduce the impact of the vortex on the performance of the fan. The design of the narrow end of the trapezoid facing the center hole of the impeller is conducive to guiding the airflow to the central area and enhancing the flow effect of the airflow in the central area. This can improve the wind collection capacity of the fan impeller, make the airflow more evenly distributed on the entire impeller, and improve the overall performance of the fan.

[0019] Furthermore, firstly, the arc corner can effectively reduce the impact and turbulence of the airflow when passing through the vortex elimination hole. Compared with sharp corners, the arc corner is smoother, and the airflow can transition more smoothly when passing through, thereby reducing the generation of noise and energy loss; when the fan impeller rotates at high speed, the airflow will produce a large impact force and vibration on the vortex elimination hole. The arc corner can better disperse these forces and reduce stress concentration, thereby improving the durability and service life of the vortex elimination hole.

[0020] Furthermore, the impeller blades with a curved surface design can better adapt to the flow characteristics of the airflow. During the operation of the fan, when the airflow passes through the impeller blades, the curved surface shape can guide the airflow to flow more smoothly, reducing the separation of the airflow and the generation of vortices; using screws for fixing is not only simple and reliable, but also convenient for maintenance and replacement.

[0021] Furthermore, a shaft sleeve for connection and fixing is provided between the second fixing plate and the motor, which can ensure the stability and efficient operation of the fan system, reduce the damage to the system caused by vibration and impact force, and facilitate installation and maintenance.

[0022] Furthermore, the circumferentially arranged sleeve mounting holes provide precise positioning and evenly distributed support for the sleeve installation. The circumferentially equidistant layout can effectively avoid vibration and imbalance problems caused by improper installation positions, thereby improving the stability and reliability of the entire fan system.

[0023] Furthermore, the sleeve can be assembled on the motor shaft provided by the motor through the sleeve center hole, thereby realizing effective connection between the fan impeller and the motor. This connection method is not only simple and reliable, but also can ensure the stability and balance of the fan impeller during rotation.

[0024] Furthermore, the nested structure of the boss and the sleeve mounting hole can achieve a tighter fit. The shape and size of the boss match the sleeve mounting hole, and the sleeve can be accurately positioned and fixed on the fixing plate through nested installation. This tight fit can effectively prevent the sleeve from shifting or loosening during the operation of the fan, ensuring the stable operation of the fan impeller.

[0025] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a fan impeller for a low-noise gas water heater of the utility model;

[0028] Figure 2 This is a schematic diagram of the installation of a fan impeller for a low-noise gas water heater of the utility model;

[0029] The following are the descriptions of the reference numerals:

[0030] The first fixing plate 1, the second fixing plate 2, the impeller blade 4, the motor 5, the volute 6, the vortex elimination hole 2-1, the impeller center hole 2-2, the shaft sleeve 3, the shaft sleeve mounting hole 2-3, the shaft sleeve center hole 3-1, the motor shaft 5-1, and the boss 3-2. DETAILED DESCRIPTION

[0031] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0032] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0033] like Figure 1 , Figure 2 As shown, a low-noise fan impeller for a gas water heater includes a first fixing plate 1, a second fixing plate 2 and a plurality of impeller blades 4; the plurality of impeller blades 4 are assembled between the first fixing plate 1 and the second fixing plate 2 to form a complete fan impeller, and the first fixing plate 1 and the second fixing plate 2 enable the impeller blades 4 to remain stable during rotation and are not easily deformed or damaged. The second fixing plate 2 is provided with a vortex elimination hole 2-1 for eliminating vortexes, and the vortex elimination hole 2-1 effectively destroys the formation of vortexes, thereby reducing noise and improving the performance of the fan.

[0034] The center of the second fixing plate 2 is provided with an impeller center hole 2-2, which allows the motor shaft 5-1 of the motor to pass through, thereby connecting with the motor 5 to ensure that the fan impeller can rotate smoothly and continuously. At the same time, the impeller center hole 2-2 also plays a supporting and positioning role to ensure the stability and reliability of the entire impeller.

[0035] Furthermore, a plurality of vortex elimination holes 2-1 are provided, and these vortex elimination holes 2-1 are arranged circumferentially with the impeller center hole 2-2 as the center. The circumferentially arranged vortex elimination holes 2-1 can eliminate vortices more effectively. The circumferential arrangement can ensure that the effect of the vortex elimination holes 2-1 is evenly distributed on the entire impeller, further improving the effect of eliminating vortices. The design of multiple vortex elimination holes 2-1 also helps to increase the ventilation area of ​​the fan impeller, improve the smoothness of the airflow through the impeller blades 4, and reduce the airflow resistance, thereby further reducing noise and improving the efficiency of the fan.

[0036] The vortex elimination hole 2-1 is in a trapezoidal shape, and the narrow end of the trapezoid faces the central hole 2-2 of the impeller, so that the vortex elimination hole 2-1 gradually narrows in the direction toward the central hole 2-2 of the impeller, which helps to better guide the airflow, reduce the sudden change of the airflow at the hole, and reduce the noise. The trapezoidal structure can also effectively disperse the vortex energy, avoid the vortex from being too concentrated in a local area, and further reduce the impact of the vortex on the performance of the fan.

[0037] Furthermore, the trapezoidal corners of the vortex elimination hole 2-1 are arc-shaped, and the arc-shaped corners can effectively reduce the impact and turbulence of the airflow when passing through the vortex elimination hole 2-1. Compared with sharp corners, the arc-shaped corners are smoother, and the airflow can transition more smoothly when passing through, thereby reducing the generation of noise and energy loss; it also enhances the structural strength of the vortex elimination hole 2-1. When the fan impeller rotates at high speed, the airflow will produce a large impact force and vibration on the vortex elimination hole 2-1. The arc-shaped corners can better disperse these forces and reduce stress concentration, thereby improving the durability and service life of the entire device.

[0038] The shape of several impeller blades 4 is a curved surface, and they are fixed between the first fixing plate 1 and the second fixing plate 2 at equal intervals by screws; the curved impeller blades 4 can better adapt to the flow characteristics of the airflow. During the operation of the fan, when the airflow passes through the impeller blades 4, the curved surface shape can guide the airflow to flow more smoothly, reducing the separation of the airflow and the generation of vortices. This design can reduce energy loss and improve the efficiency of the fan. Fixing with screws is not only simple and reliable, but also convenient for maintenance and replacement. The screw connection has high strength and stability, which can ensure that the impeller blades will not loosen or fall off when rotating at high speed. At the same time, if the impeller blades need to be replaced or repaired, it can be easily completed by removing the screws, which improves the maintainability of the equipment.

[0039] The fan impeller is assembled in the volute 6 connected to the motor 5, and a shaft sleeve 3 for connection and fixing is provided between the second fixing plate 2 and the motor 5. The second fixing plate 2 is provided with a plurality of shaft sleeve mounting holes 2-3, and the plurality of shaft sleeve mounting holes 2-3 are arranged circumferentially with the impeller center hole 2-2 as the center; the circumferentially arranged shaft sleeve mounting holes 2-3 provide precise positioning and evenly distributed support for the installation of the shaft sleeve 3, and the shaft sleeve 3 is usually used to fix and support the bearing to ensure smooth and stable rotation of the impeller.

[0040] Among them, the center of the sleeve 3 is provided with a sleeve center hole 3-1, and the sleeve 3 is assembled on the motor shaft 5-1 provided on the motor 5 through the sleeve center hole 3-1, and the sleeve center hole 3-1 realizes the connection between the sleeve 3 and the motor 5; the sleeve 3 is provided with a plurality of bosses 3-2, and the plurality of bosses 3-2 are arranged circumferentially with the sleeve center hole 3-1 as the center. The plurality of bosses 3-2 are nested in the plurality of sleeve mounting holes 2-3, and the plurality of bosses 3-2 provide more connection points and support points. Each boss 3-2 can be nested and connected with the corresponding sleeve mounting hole 2-3, which increases the redundancy and reliability of the connection, and further enhances the connection stability and reliability between the fan impeller and the motor 5.

[0041] The vortex-eliminating hole 2-1, the impeller center hole 2-2 and the sleeve mounting hole 2-3 are all opened on the second fixed plate 2, and need to be aligned and adjusted with other components during the installation process. In this embodiment, in order to better install and adjust, the vortex-eliminating hole 2-1, the impeller center hole 2-2 and the sleeve mounting hole 2-3 are in the same plane.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A fan impeller for a low-noise gas water heater, mounted in a volute (6) connected to a motor (5), Features: The invention comprises a first fixing plate (1), a second fixing plate (2) and a plurality of impeller blades (4); the plurality of impeller blades (4) are assembled between the first fixing plate (1) and the second fixing plate (2); the second fixing plate (2) is provided with a vortex elimination hole (2-1) for eliminating vortex, an impeller center hole (2-2) and a shaft sleeve mounting hole (2-3); the second fixing plate (2) is installed in a volute (6) through the impeller center hole (2-2) and the shaft sleeve mounting hole (2-3).

2. A fan impeller for a low-noise gas water heater according to claim 1, Features: The impeller center hole (2-2) is opened at the center of the second fixed plate (2), and a plurality of vortex elimination holes (2-1) are provided. The plurality of vortex elimination holes (2-1) are arranged circumferentially with the impeller center hole (2-2) as the center.

3. A fan impeller for a low-noise gas water heater according to claim 1, Features: The vortex elimination hole (2-1) is in the shape of a trapezoid, with the narrow end of the trapezoid facing the central hole (2-2) of the impeller.

4. A fan impeller for a low-noise gas water heater according to claim 3, Features: The trapezoidal corners of the vortex elimination holes (2-1) are arc-shaped.

5. A fan impeller for a low-noise gas water heater according to claim 1, Features: The plurality of impeller blades (4) are curved surfaces, and the plurality of impeller blades (4) are fixed at equal intervals between the first fixing plate (1) and the second fixing plate (2) by means of screws.

6. A fan impeller for a low-noise gas water heater according to claim 1, Features: A shaft sleeve (3) for connection and fixation is provided between the second fixing plate (2) and the motor (5).

7. A fan impeller for a low-noise gas water heater according to claim 2, Features: A plurality of the shaft sleeve mounting holes (2-3) are provided, and the plurality of shaft sleeve mounting holes (2-3) are arranged circumferentially with the impeller central hole (2-2) as the center.

8. A fan impeller for a low-noise gas water heater according to claim 6, Features: A sleeve center hole (3-1) is provided at the center of the sleeve (3), and the sleeve (3) is assembled on a motor shaft (5-1) provided on the motor (5) through the sleeve center hole (3-1).

9. A fan impeller for a low-noise gas water heater according to claim 6, Features: The shaft sleeve (3) is provided with a plurality of bosses (3-2), and the plurality of bosses (3-2) are arranged circumferentially with the shaft sleeve center hole (3-1) as the center.

10. A fan impeller for a low-noise gas water heater according to claim 9, Features: The plurality of bosses (3-2) are nested in the plurality of shaft sleeve mounting holes (2-3).

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