Fan assembly and water heater

Abstract

The utility model relates to the technical field of water heaters, and particularly discloses a fan assembly and a water heater, the fan assembly comprises an exhaust fume collecting hood, a fume exhaust cavity is arranged on the exhaust fume collecting hood, a fume outlet pipe is arranged on the fume exhaust cavity, two volutes are arranged between the exhaust fume collecting hood and the fume exhaust cavity, an impeller is arranged in each volute, and the two volutes are communicated with the exhaust fume collecting hood. Air inlets of the volutes are communicated with an inner cavity of the exhaust fume collecting hood, air outlets of the volutes are communicated with the exhaust fume discharging cavity, and the fan assembly further comprises a motor which drives the impellers in the two volutes to rotate at the same time. According to the fan assembly, on the premise that enough air volume can be provided, high-speed operation of the impeller can be avoided, noise is effectively reduced, and meanwhile the wind resistance can be improved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a fan assembly in a water heater and a water heater having the fan assembly. Background Technology

[0002] As a common household appliance, gas water heaters rely heavily on a fan as one of their core components. The fan's main function is to provide sufficient air to the combustion chamber and exhaust the combustion gases. Currently, gas water heater fans typically employ a single-impeller structure. While this structure is simple, it presents several problems in practical use: 1. To provide sufficient airflow, a single-impeller fan often requires increasing the impeller's rotational speed. However, as the speed increases, the fan noise significantly increases, especially during high-load operation, severely impacting the user experience; 2. The single-impeller fan has a relatively small airflow. External wind interference or partial blockage of the exhaust port can easily lead to incomplete combustion or poor exhaust, affecting the normal operation of the water heater. This problem is particularly pronounced in high-rise buildings or in strong wind environments. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a fan assembly with a double impeller, which can provide sufficient air volume while avoiding high-speed operation of the impeller, effectively reducing noise, and improving wind resistance; the present invention also provides a water heater with the fan assembly.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] The present invention discloses a fan assembly comprising a smoke collection hood, a smoke exhaust chamber on the smoke collection hood, a smoke outlet pipe on the smoke exhaust chamber, two volutes between the smoke collection hood and the smoke exhaust chamber, an impeller disposed in each volute, an air inlet of the volute communicating with the inner cavity of the smoke collection hood, and an air outlet of the volute communicating with the smoke exhaust chamber. The fan assembly further comprises a motor that simultaneously drives the impellers in the two volutes to rotate.

[0006] The fan assembly described in this utility model features two impellers, both driven simultaneously by a single motor. This ensures the impellers rotate at the same speed, creating a negative pressure inside the volute that draws in air. This air is then supplied for the combustion of gas in the water heater. Simultaneously, the generated exhaust gas enters through the fume hood, passes through the volute, and is collected in the exhaust chamber before being discharged uniformly. Because it has two impellers rotating at the same speed, the airflow is increased, avoiding the need to increase impeller speed to increase airflow and effectively reducing noise during operation. Furthermore, compared to a fan assembly with only one impeller, the two impellers allow for a more even distribution of intake pressure, further ensuring complete combustion of the gas and reducing CO emissions. In addition, the increased airflow not only ensures complete combustion but also enhances the water heater's wind resistance, improving its safety during use.

[0007] Furthermore, the motor is located between the two volutes, and the two ends of the motor's output shaft extend into the interior of the corresponding volute and are connected to the impeller inside the corresponding volute. The smoke hood is provided with two outlets, and the two volutes and the motor are located between the two outlets of the smoke hood, and the air inlet of each volute is connected to the outlet of the corresponding smoke hood.

[0008] Furthermore, the motor includes a motor housing, which is connected to one of the volutes by a plurality of connectors. A heat sink is provided on one side of the connectors and between the motor housing and the volute, and the heat sink is sleeved on the output shaft of the motor.

[0009] Furthermore, the heat sink includes a mounting bracket sleeved on the output shaft of the motor, and multiple heat sinks are arranged in a circular array on the mounting bracket, with the heat sinks extending toward the motor.

[0010] Furthermore, the exhaust chamber is provided with two inlets, and the two volutes correspond one-to-one with the two inlets of the exhaust chamber. The air outlet of each volute is connected to the corresponding inlet on the exhaust chamber.

[0011] Furthermore, a smoke outlet pipe is provided on the smoke exhaust chamber to connect to the inside of the smoke exhaust chamber. There are two smoke outlet pipes, which are spaced apart.

[0012] Furthermore, the volute includes a first housing and a second housing, the air inlet is disposed on the first housing, the first housing and the second housing are connected to form the volute, and a portion of the air outlet of the volute is located on the first housing, while the remaining portion is located on the second housing.

[0013] Furthermore, the impeller includes two rotating disks spaced apart, with multiple blades spaced apart between the two rotating disks. The blades are arc-shaped, and the bending direction of each blade faces the rotation direction of the impeller.

[0014] The water heater of this utility model includes a burner and a heat exchanger connected to the burner. The heat exchanger is connected to the top of the burner. It also includes the aforementioned fan assembly, and the inlet of the smoke hood in the fan assembly is connected to the heat exchanger.

[0015] The water heater described in this utility model has all the beneficial technical effects it brings because it has the above-mentioned fan assembly, which will not be described in detail here. Attached Figure Description

[0016] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0017] Figure 1 This is a perspective view of the fan assembly of this utility model.

[0018] Figure 2 This is a schematic diagram of the heat sink.

[0019] Figure 3 This is a cross-sectional view of the wind turbine assembly.

[0020] Figure 4 A 3D view of a wind turbine assembly with one of its volutes removed.

[0021] Figure 5 This is the main view of the wind turbine assembly.

[0022] Figure 6 for Figure 5 Screenshot from the AA direction.

[0023] Figure 7 This is a schematic diagram of the structure of the water heater in this utility model.

[0024] The components include: 1. Smoke hood; 2. Smoke exhaust chamber; 3. Smoke outlet pipe; 4. Volute; 41. First housing; 42. Second housing; 5. Impeller; 51. Rotary disc; 52. Blade; 6. Motor; 7. Inlet; 8. Burner; 9. Output shaft; 10. Connector; 11. Heat sink; 111. Mounting bracket; 112. Heat sink; 12. Heat exchanger. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings.

[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] This utility model specifically provides an implementation method for a wind turbine assembly, see [link to relevant documentation]. Figure 1 The system includes a smoke hood 1, a smoke exhaust chamber 2 on the smoke hood 1, a smoke outlet pipe 3 on the smoke exhaust chamber 2, and two volutes 4 between the smoke hood 1 and the smoke exhaust chamber 2. An impeller 5 is installed inside each volute 4. The air inlet of the volute 4 communicates with the inner cavity of the smoke hood 1, and the air outlet of the volute 4 communicates with the smoke exhaust chamber 2. The fan assembly also includes a motor 6 that simultaneously drives the impellers 5 in both volutes 4. Specifically, the smoke hood 1 is U-shaped, with the two volutes 4 and the motor 6 all located in the groove of the smoke hood 1. An inlet 7 is located at the bottom of the smoke hood 1 for connection to the burner 8 of the water heater. The smoke exhaust chamber 2 is located above the groove of the smoke hood 1. The smoke exhaust chamber 2 has two inlets, with each of the two volutes 4 corresponding to one of the two inlets of the smoke exhaust chamber 2. The air outlet of each volute 4 communicates with the corresponding inlet on the smoke exhaust chamber 2. This fan assembly features two impellers 5, both driven by a single motor 6. The identical rotational speed of the two impellers creates a negative pressure inside the volute 4, drawing in air to provide the necessary air for gas combustion in the water heater. Simultaneously, exhaust gases enter through the fume hood 1, pass through the volute 4, and are collected in the exhaust chamber 2 before being discharged. The presence of two impellers 5, rotating at the same speed, increases airflow without requiring a change in impeller speed, effectively reducing noise during operation. Compared to a fan assembly with only one impeller 5, the two impellers provide a more even distribution of intake pressure, ensuring more complete combustion and reducing CO emissions. Furthermore, the increased airflow not only ensures more complete combustion but also enhances the water heater's wind resistance, improving safety during use.

[0029] In the preferred embodiment, see Figure 1The motor 6 is located between the two volutes 4. The output shaft 9 of the motor 6 extends into the corresponding volutes 4 at both ends and connects to the impeller 5 inside the corresponding volutes 4. The smoke hood 1 has two outlets, specifically located on the two side walls of the groove in the smoke hood 1. The two volutes 4 and the motor 6 are located between the two outlets of the smoke hood 1, and the air inlet of each volute 4 is connected to the outlet of the corresponding end of the smoke hood 1. By setting the smoke hood 1 in a U-shape, and combining the two volutes 4 and the motor 6 located between the two outlets of the smoke hood 1, with the motor 6 positioned between the two volutes 4, the overall structure of the fan assembly can be made more compact. At the same time, it ensures a more uniform distribution of the air pressure entering the two volutes 4 from the two outlets of the smoke hood 1, further ensuring complete combustion of the gas and reducing CO emissions.

[0030] In the preferred embodiment, see Figure 1 and 2 The motor 6 includes a motor housing, which is connected to one of the volutes 4 by multiple connectors 10. In this embodiment, three connectors 10 are used to ensure that the motor 6 can be stably connected to the corresponding volute 4, while avoiding the complex connection relationship caused by using more connectors 10. A heat sink 11 is provided on one side of the connector 10 and between the motor housing and the corresponding volute 4. The heat sink 11 is sleeved on the output shaft 9 of the motor 6. When the output shaft 9 of the motor 6 rotates, it will drive the heat sink 11 to rotate together, thereby dissipating the heat of the motor 6 and ensuring that the motor 6 works normally.

[0031] In the preferred embodiment, see Figure 2 The heat sink 11 includes a mounting bracket 111 sleeved on the output shaft 9 of the motor 6. Multiple heat sinks 112 are arranged in a ring array on the mounting bracket 111. The heat sinks 112 extend toward the motor 6. By extending the heat sinks 112 toward the motor 6, the motor 6 can receive greater airflow and achieve better heat dissipation.

[0032] In the preferred embodiment, see Figure 1 The exhaust chamber 2 is equipped with two exhaust pipes 3 that connect to the interior of the exhaust chamber 2. The two exhaust pipes 3 are spaced apart. By setting two exhaust pipes 3, if one exhaust pipe 3 becomes blocked, the other exhaust pipe 3 can still ensure that the water heater works normally, thus improving the water heater's environmental adaptability.

[0033] In the preferred embodiment, see Figure 3The volute 4 includes a first housing 41 and a second housing 42. The air inlet is located on the first housing 41. The first housing 41 and the second housing 42 are joined together to form the volute 4. A portion of the air outlet of the volute 4 is located on the first housing 41, and the remainder is located on the second housing 42. The volute 4 is formed by joining the first housing 41 and the second housing 42, which facilitates the installation of the impeller 5 in the first housing 41 or the second housing 42, and then joining the first housing 41 and the second housing 42 together to enclose the impeller 5 internally, thus promoting rapid assembly of the impeller 5.

[0034] In the preferred embodiment, see Figure 5 and 6 The impeller 5 includes two rotating disks 51 spaced apart, with a plurality of blades 52 spaced between the two rotating disks 51. The blades 52 are arc-shaped, and the curvature direction of each blade 52 faces the rotation direction of the impeller 5. In this embodiment, the rotation direction of the impeller 5 is described in [reference needed]. Figure 6 The direction indicated by the middle arrow is the bending direction of blade 52 at this time. Figure 6 As shown, when the rotation direction of the impeller 5 is reversed, the bending direction of the blades 52 also reverses, thereby generating a greater negative pressure when the impeller 5 rotates. Furthermore, the number of blades 52 on the two impellers 5 can be the same or different, and their shapes can be identical or different. When it is necessary to adjust the airflow speed at the air outlets of the two volutes 4, this can be achieved by adjusting the number and / or shape of the blades 52 on the impellers 5.

[0035] This utility model also provides a specific embodiment of a water heater, which is a gas water heater; see [link / reference]. Figure 7 The water heater includes a burner 8 and a heat exchanger 12 connected to the burner 8. The heat exchanger 12 is connected to the top of the burner 8. It also includes the aforementioned fan assembly, with the inlet 7 of the smoke hood 1 in the fan assembly connected to the heat exchanger 12. Because the water heater in this embodiment has the aforementioned fan assembly, it possesses all the beneficial technical effects it brings, which will not be elaborated upon here.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fan assembly comprising a fume hood, a fume discharge cavity being provided on the fume hood, and a fume discharge pipe being provided on the fume discharge cavity, characterized in that: Two volutes are arranged between the fume hood and the fume exhaust chamber, and an impeller is arranged in each volute, the air inlet of the volute is communicated with the inner cavity of the fume hood, the air outlet of the volute is communicated with the fume exhaust chamber, and the fan assembly further comprises a motor for simultaneously driving the rotation of the impellers in the two volutes.

2. The fan assembly of claim 1, wherein: The motor is located between the two volutes, the output shaft of the motor extends into the corresponding volute, and the impeller in the corresponding volute is connected; two outlets are arranged on the fume hood, the two volutes and the motor are located between the two outlets of the fume hood, and the air inlet of each volute is communicated with the outlet of the corresponding fume hood.

3. The fan assembly of claim 2, wherein: The motor comprises a motor housing, the motor housing is connected to one of the volutes through a plurality of connecting pieces, a heat dissipation piece is arranged on the side of the connecting piece and between the motor housing and the volute, and the heat dissipation piece is sleeved on the output shaft of the motor.

4. The fan assembly of claim 3, wherein: The heat dissipation piece comprises a mounting bracket sleeved on the output shaft of the motor, and a plurality of heat dissipation fins are arranged on the mounting bracket in an annular array, and the heat dissipation fins extend towards the motor.

5. The fan assembly of claim 1, wherein: Two inlets are arranged on the fume exhaust chamber, and the two volutes and the two inlets of the fume exhaust chamber are one-to-one corresponding, and the air outlet of each volute is communicated with the corresponding inlet of the fume exhaust chamber.

6. The fan assembly of claim 1, wherein: Two smoke outlets are arranged on the fume exhaust chamber and communicated with the inside of the fume exhaust chamber, and the two smoke outlets are arranged at intervals.

7. The fan assembly of claim 1, wherein: The volute comprises a first housing and a second housing, the air inlet is arranged on the first housing, the first housing and the second housing are abutted to form the volute, and a part of the air outlet of the volute is located on the first housing, and the remaining part is located on the second housing.

8. The fan assembly of claim 1, wherein: The impeller comprises two rotating discs arranged at intervals, a plurality of blades are arranged between the two rotating discs, the blades are arc-shaped, and the bending direction of each blade is towards the rotating direction of the impeller.

9. A water heater comprising a burner and a heat exchanger connected to the burner, the heat exchanger being connected to the top of the burner, characterized in that: Further comprising the fan assembly according to any one of claims 1-8, and the inlet of the fume hood in the fan assembly is connected with the heat exchanger.

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