Fan assembly and gas water heater

Abstract

The utility model discloses a fan assembly and a gas water heater, and relates to the technical field of gas water heaters. The fan assembly comprises a shell and a sealing piece, the shell comprises a volute body and a volute cover plate, and the volute cover plate covers the opening side of the volute body so that an air channel can be formed in the shell. The sealing piece is arranged between the volute body and the volute cover plate, and the sealing piece, the volute body and / or the volute cover plate are integrated in an injection molding mode. According to the fan assembly, accurate positioning of the sealing piece can be achieved, the sealing performance of the air channel formed in the shell is guaranteed, and then the problem that the service life of the fan assembly is affected by air leakage of the air channel is solved; and the procedure of installing a sealing piece during assembling is omitted, and the assembling efficiency of the fan assembly is improved.

Description

Technical Field

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

[0002] The fan is a key component of a gas water heater, and the sealing of the air duct inside the fan affects the performance and lifespan of the gas water heater. If the air duct of the fan is poorly sealed and there is air leakage, the fan will operate under overload to compensate for the air leakage, increasing the stress on the impeller and easily causing malfunctions such as impeller deformation, wear, or even breakage.

[0003] The volute assembly of a blower is typically a sheet metal part, with upper and lower cover plates riveted together to form the air duct. Due to the poor flatness of the sheet metal, gaps often exist after assembly, leading to air leakage during blower operation and affecting performance. Furthermore, manufacturing and assembly errors result in variations in the sealing performance of each blower, causing poor performance consistency, such as inconsistent air pressure and speed, thus affecting product stability. In existing technology, to ensure consistent blower performance, sealing gaskets are adhered to the mating surfaces of the upper and lower cover plates during assembly. However, this is prone to incomplete adhesion, failing to guarantee sealing performance and significantly reducing production efficiency. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a fan assembly that can effectively solve the problems of poor sealing performance and low production efficiency of existing fan assemblies; thereby achieving the goal of improving the sealing performance and assembly efficiency of the fan assembly.

[0005] The second technical problem solved by this utility model is to provide a gas water heater that can effectively solve the problems of poor sealing and low production efficiency of existing gas water heaters; and achieve the purpose of improving the sealing of the fan assembly, ensuring the performance and production efficiency of the gas water heater.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] Wind turbine components, including:

[0008] The housing includes a volute body and a volute cover plate, wherein the volute cover plate is disposed on the opening side of the volute body to form an air duct inside the housing;

[0009] A sealing element is disposed between the volute body and the volute cover plate, and the sealing element is injection molded integrally with the volute body and / or the volute cover plate.

[0010] The fan assembly described in this utility model has the following advantages compared with the prior art:

[0011] The fan assembly provided by this utility model includes a volute body and a volute cover plate. A sealing element is provided between the volute body and the volute cover plate, and the sealing element is injection molded onto the volute body and / or the volute cover plate. This not only achieves precise positioning of the sealing element and ensures the airtightness of the air duct formed inside the housing, thus solving the problem of air leakage in the air duct affecting the service life of the fan assembly, but also eliminates the step of installing the sealing element during assembly, improving the production efficiency of the fan assembly.

[0012] In one embodiment, the seal includes a first seal that is integrally injection molded with the volute body.

[0013] In one embodiment, a female positioning stop is provided on the opening side of the volute body, and a male positioning stop is provided on the outer periphery of the volute cover plate. The female positioning stop and the male positioning stop cooperate for positioning.

[0014] The first sealing element includes a sealing strip, which is injection molded above the protrusion of the positioning nut stop.

[0015] In one embodiment, an air outlet groove is provided on the periphery of the volute body, and an air outlet cover plate is provided on the volute cover plate corresponding to the air outlet groove. The air outlet cover plate is placed on the air outlet groove to form an air outlet on the periphery of the housing.

[0016] The female positioning stop and the sealing strip both extend to the top end face of the air outlet groove; the male positioning stop extends to the surface of the air outlet cover that is in contact with the top end face of the air outlet groove.

[0017] In one embodiment, the seal further includes a second seal disposed at the air outlet;

[0018] The second sealing element includes a U-shaped sealing ring and an inverted U-shaped sealing ring. The U-shaped sealing ring is disposed on the volute body, and the inverted U-shaped sealing ring is disposed on the volute cover plate. After the volute cover plate is placed on the volute body, the inverted U-shaped sealing ring and the U-shaped sealing ring are joined to form the second sealing element.

[0019] In one embodiment, the U-shaped sealing ring is injection molded integrally with the volute body; the inverted U-shaped sealing ring is injection molded integrally with the air outlet cover.

[0020] In one embodiment, the U-shaped sealing ring and the sealing strip are an integral structure.

[0021] In one embodiment, the air outlet cover includes a horizontal extension plate and a vertical plate vertically disposed at one end of the horizontal extension plate, the positioning male stop extends to the connection between the horizontal extension plate and the vertical plate, the U-shaped sealing ring is disposed on the end face of the air outlet, and the inverted U-shaped sealing ring is disposed on the side of the vertical plate facing away from the horizontal extension plate.

[0022] In one embodiment, the fan assembly further includes a fastening component. A first connecting lug is provided on the outer periphery of the opening side of the volute body, and a second connecting lug is provided on the outer periphery of the volute cover. The first connecting lug and the second connecting lug are fitted together and then fixed by the fastening component.

[0023] The second technical problem mentioned above is solved by the following technical solution:

[0024] A gas water heater that includes a fan assembly as described in any of the above embodiments.

[0025] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0026] The gas water heater provided by this utility model uses the aforementioned fan assembly, which integrates the sealing element with the volute body and / or volute cover plate by injection molding. This avoids air leakage in the duct caused by improper installation of the sealing element during assembly, which would affect the performance and service life of the fan assembly and improve assembly efficiency. In this way, the performance and production efficiency of the gas water heater are guaranteed, while the service life of the gas water heater is extended. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the shell provided in a specific embodiment of this utility model;

[0029] Figure 2 This is a cross-sectional view of the connection between the motor and the wind turbine provided in a specific embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the volute body provided in a specific embodiment of this utility model;

[0031] Figure 4This is an exploded view of the fan assembly provided in a specific embodiment of this utility model.

[0032] In the picture:

[0033] 1. Shell; 11. Volute body; 111. Positioning nut; 112. Air outlet slot; 113. First connecting lug; 1131. First connecting hole; 12. Volute cover plate; 121. Air outlet cover plate; 1211. Horizontal extension plate; 1212. Vertical plate; 122. Second connecting lug; 1221. Second connecting hole; 123. Air inlet;

[0034] 2. Sealing element; 21. First sealing element; 22. Second sealing element; 221. U-shaped sealing ring; 222. Inverted U-shaped sealing ring;

[0035] 3. Electric motor;

[0036] 4. Wind turbine;

[0037] 5. Air outlet. Detailed Implementation

[0038] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] like Figures 1-4 As shown, this embodiment provides a fan assembly, including a housing 1, a motor 3, and a fan wheel 4. The fan wheel 4 is disposed inside the housing 1, and the rotating shaft of the motor 3 is connected to the fan wheel 4. The housing 1 has an air inlet 123 and an air outlet 5. An air duct is formed between the fan wheel 4 and the inner wall of the housing 1. The air duct is connected to both the air inlet 123 and the air outlet 5. The motor 3 drives the fan wheel 4 to rotate, which can draw external air into the housing 1 through the air inlet 123. The air duct is used to collect the gas discharged from the fan wheel 4, converting the kinetic energy of the gas into static pressure energy, and at the same time guiding the airflow to the air outlet 5, so that the airflow flows out smoothly.

[0041] Motor 3 generates strong power for the rapid operation of impeller 4, which, in conjunction with the casing 1, produces airflow. Impeller 4 has a multi-blade structure with good aerodynamic performance. Motor 3 drives impeller 4 to rotate, and the blades do work on the gas, giving it kinetic and pressure energy, which is discharged from the periphery of impeller 4 and creates pressure between the impeller and the inner wall of casing 1. During the use of the fan assembly, poor duct sealing can lead to air leakage, reducing the actual effective airflow of the fan assembly and causing a drop in pressure within the duct. To maintain the required air pressure, motor 3 needs to output more power, increasing energy consumption. Furthermore, prolonged high-load operation of motor 3 causes it to overheat, accelerating the aging of the insulation layer and shortening its lifespan. Simultaneously, the fan assembly overworks to compensate for air leakage, increasing the stress on impeller 4 and making it prone to deformation, wear, or even breakage, further shortening the lifespan of the fan assembly.

[0042] To ensure the airtightness of the fan assembly's duct and increase its service life, this embodiment provides a fan assembly whose housing 1 includes a volute body 11 and a volute cover plate 12. The volute cover plate 12 covers the opening side of the volute body 11, forming an air duct inside the housing 1. A sealing element 2 is disposed between the volute body 11 and the volute cover plate 12, and the sealing element 2 is injection molded integrally with the volute body 11 and / or the volute cover plate 12. This design achieves precise positioning of the sealing element 2, ensuring the airtightness of the air duct formed inside the housing 1, thus solving the problem of air leakage affecting the service life of the fan assembly; it also eliminates the need for the installation of the sealing element 2 during assembly, improving the production efficiency of the fan assembly.

[0043] Specifically, the volute body 11, the volute cover plate 12, and the impeller 4 are all molded parts made of plastic. For example, the plastic material is thermoplastic or thermosetting plastic. In this embodiment, the volute body 11 and the volute cover plate 12 are both injection molded from bulk or granular plastic (BMC). BMC is a thermosetting plastic that is resistant to high temperatures, has good thermal stability, strong corrosion resistance, and high dimensional accuracy after integral molding.

[0044] The seal 2 is made of elastic material. Before injection molding the volute body 11 or volute cover plate 12, the seal 2 is precisely positioned on the injection mold and injection molded into an integral structure with the volute body 11 and / or volute cover plate 12.

[0045] In one embodiment, the fan assembly further includes a fastening component. A first connecting lug 113 is provided on the outer periphery of the opening side of the volute body 11, and a second connecting lug 122 is provided on the outer periphery of the volute cover plate 12. The first connecting lug 113 and the second connecting lug 122 are fitted together and then fixed by the fastening component. A first connecting hole 1131 is provided on the first connecting lug 113, and a second connecting hole 1221 is provided on the second connecting lug 122. Due to the high dimensional accuracy of the injection molded part, the flatness of the contact surface between the volute body 11 and the volute cover plate 12 can be ensured. After the first connecting lug 113 and the second connecting lug 122 are fitted together, the first connecting hole 1131 and the second connecting hole 1221 are aligned. The fastening components include fastening bolts and nuts. The fastening bolts pass through the first connecting hole 1131 and the second connecting hole 1221 in sequence and are then fixed by the nuts, pressing the sealing element 2 between the volute body 11 and the volute cover plate 12 to ensure the airtightness of the air duct formed after the volute body 11 and the volute cover plate 12 are fixed.

[0046] Of course, in other embodiments, the fastening component may also be a magnetic component or an adhesive component.

[0047] In one embodiment, the sealing element 2 includes a first sealing element 21, which is integrally injection molded with the volute body 11. The first sealing element 21 is used to ensure the airtightness of the air duct formed inside the housing 1 after the volute cover plate 12 is fixed to the volute body 11, and to prevent gas in the air duct from flowing out through the gap between the volute cover plate 12 and the volute body 11.

[0048] Specifically, a female positioning stop 111 is provided on the open side of the volute body 11, and a male positioning stop is provided on the outer periphery of the volute cover plate 12. The female positioning stop 111 and the male positioning stop cooperate for positioning. Before the volute body 11 and the volute cover plate 12 are fixed by fastening components, the female positioning stop 111 and the male positioning stop cooperate for positioning, thereby achieving axial positioning of the volute body 11 and the volute cover plate 12. Then, the first connecting hole 1131 and the second connecting hole 1221 are aligned to achieve circumferential positioning of the volute body 11 and the volute cover plate 12. Finally, they are fixed by fastening components to ensure the accuracy of the connection position between the volute cover plate 12 and the volute body 11, and further ensure the airtightness of the air duct.

[0049] Preferably, the first sealing element 21 includes a sealing strip, which is injection molded above the protrusion of the positioning female stop 111. The protrusion of the positioning female stop 111 corresponds to the recess of the positioning male stop, and the recess of the positioning male stop is located on the outer periphery of the volute cover plate 12. Placing the sealing strip on the outer side of the mating surface between the volute cover plate 12 and the volute body 11 can better ensure the sealing performance of the air duct. Before injection molding the volute body 11, the sealing strip is laid along the protrusion of the positioning female stop 111. The protrusion of the positioning female stop 111 guides and positions the sealing strip, ensuring the accuracy of the sealing strip's position and further ensuring the sealing performance of the air duct.

[0050] In one embodiment, an air outlet groove 112 is provided on the periphery of the volute body 11, and an air outlet cover plate 12 is provided on the volute cover plate 121 corresponding to the air outlet groove 112. The air outlet cover plate 121 covers the air outlet groove 112 to form an air outlet 5 on the periphery of the housing 1. In this embodiment, an air inlet 123 is provided at the center of the volute cover plate 12 corresponding to the impeller 4, and the air inlet 123 is set at a 90° angle to the air outlet 5.

[0051] The female positioning stop 111 and the sealing strip both extend to the top end face of the air outlet groove 112; the male positioning stop extends to the surface of the air outlet cover 121 that fits against the top end face of the air outlet groove 112, so as to ensure the integrity of the seal along the extension direction of the air duct.

[0052] Specifically, the air outlet cover 121 includes a horizontal extension plate 1211 and a vertical plate 1212 vertically disposed at one end of the horizontal extension plate 1211, and the positioning male stop extends to the connection between the horizontal extension plate 1211 and the vertical plate 1212.

[0053] The air outlet 5 of the fan assembly is connected to a component in the gas water heater. To ensure the sealing between the air outlet 5 of the fan assembly and the component in the gas water heater, in one embodiment, the sealing element 2 further includes a second sealing element 22, which is disposed at the air outlet 5. The second sealing element 22 includes a U-shaped sealing ring 221 and an inverted U-shaped sealing ring 222. The U-shaped sealing ring 221 is disposed on the volute body 11, and the inverted U-shaped sealing ring 222 is disposed on the volute cover plate 12. After the volute cover plate 12 is placed over the volute body 11, the inverted U-shaped sealing ring 222 and the U-shaped sealing ring 221 are joined to form the second sealing element 22.

[0054] A U-shaped sealing ring 221 is disposed on the end face of the air outlet 5, and an inverted U-shaped sealing ring 222 is disposed on the side of the vertical plate 1212 away from the horizontal extension plate 1211. A second sealing element 22 is disposed on the front face of the air outlet 5. When the air outlet 5 is connected to a component in the gas water heater, the connection end of the component in the gas water heater is provided with a sealing groove, which mates with the second sealing element 22. This not only ensures the sealing performance of the connection between the air outlet 5 and the component in the gas water heater, but also simplifies assembly.

[0055] To further improve the production efficiency of the gas water heater, the U-shaped sealing ring 221 is injection molded integrally with the volute body 11; the inverted U-shaped sealing ring 222 is injection molded integrally with the air outlet cover 121. Before injection molding the volute body 11, the U-shaped sealing ring 221 is placed on the end face of the air outlet groove 112 of the injection mold of the volute body 11 and injection molded together; correspondingly, before injection molding the volute cover 12, the inverted U-shaped sealing ring 222 is precisely positioned on the front end face of the air outlet cover 121 of the injection mold of the volute cover 12 and injection molded integrally with the volute cover 12.

[0056] In one embodiment, the U-shaped sealing ring 221 and the sealing strip are an integral structure. By making the U-shaped sealing ring 221 and the sealing strip into an integral structure, that is, before injection molding, the U-shaped sealing ring 221 and the sealing strip are a complete annular rubber strip. This annular rubber strip can be positioned on the injection mold of the volute body 11 in one go, making the operation more convenient and further improving the assembly efficiency.

[0057] This embodiment also provides a gas water heater, including the fan assembly described above. The fan assembly integrates the seal 2 with the volute body 11 and / or the volute cover plate 12 through injection molding, preventing air leakage in the duct due to improper installation of the seal 2 during assembly, which would affect the performance and service life of the fan assembly; it also improves assembly efficiency; thus ensuring the performance and production efficiency of the gas water heater, while extending its service life.

[0058] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fan assembly, characterized in that, include: The housing (1) includes a volute body (11) and a volute cover plate (12), wherein the volute cover plate (12) is disposed on the opening side of the volute body (11) so that an air duct is formed inside the housing (1); A sealing element (2) is disposed between the volute body (11) and the volute cover plate (12), and the sealing element (2) is injection molded integrally with the volute body (11) and / or the volute cover plate (12).

2. The wind turbine assembly according to claim 1, characterized in that, The sealing element (2) includes a first sealing element (21), which is injection molded integrally with the volute body (11).

3. The wind turbine assembly according to claim 2, characterized in that, The volute body (11) has a female positioning stop (111) on its open side, and the volute cover plate (12) has a male positioning stop on its outer periphery. The female positioning stop (111) and the male positioning stop cooperate to position the volute body (12). The first seal (21) includes a sealing strip, which is injection molded above the protrusion of the positioning nut stop (111).

4. The wind turbine assembly according to claim 3, characterized in that, The volute body (11) is provided with an air outlet groove (112) on its periphery, and the volute cover plate (12) is provided with an air outlet cover plate (121) corresponding to the air outlet groove (112). The air outlet cover plate (121) is placed on the air outlet groove (112) to form an air outlet (5) on the periphery of the housing (1). The female positioning stop (111) and the sealing strip both extend to the top end face of the air outlet groove (112); the male positioning stop extends to the surface of the air outlet cover (121) that is in contact with the top end face of the air outlet groove (112).

5. The wind turbine assembly according to claim 4, characterized in that, The sealing element (2) further includes a second sealing element (22), which is disposed at the air outlet (5); The second sealing element (22) includes a U-shaped sealing ring (221) and an inverted U-shaped sealing ring (222). The U-shaped sealing ring (221) is disposed on the volute body (11), and the inverted U-shaped sealing ring (222) is disposed on the volute cover plate (12). After the volute cover plate (12) covers the volute body (11), the inverted U-shaped sealing ring (222) and the U-shaped sealing ring (221) are connected to form the second sealing element (22).

6. The wind turbine assembly according to claim 5, characterized in that, The U-shaped sealing ring (221) is injection molded integrally with the volute body (11); the inverted U-shaped sealing ring (222) is injection molded integrally with the air outlet cover (121).

7. The wind turbine assembly according to claim 6, characterized in that, The U-shaped sealing ring (221) and the sealing strip are an integral structure.

8. The wind turbine assembly according to claim 5, characterized in that, The air outlet cover (121) includes a horizontal extension plate (1211) and a vertical plate (1212) vertically disposed at one end of the horizontal extension plate (1211). The positioning male stop extends to the connection between the horizontal extension plate (1211) and the vertical plate (1212). The U-shaped sealing ring (221) is disposed on the end face of the air outlet (5). The inverted U-shaped sealing ring (222) is disposed on the side of the vertical plate (1212) facing away from the horizontal extension plate (1211).

9. The wind turbine assembly according to any one of claims 1-8, characterized in that, The fan assembly also includes a fastening component. A first connecting lug (113) is provided on the outer periphery of the opening side of the volute body (11), and a second connecting lug (122) is provided on the outer periphery of the volute cover plate (12). The first connecting lug (113) and the second connecting lug (122) are fitted together and then fixed by the fastening component.

10. A gas-fired water heater, characterized in that, Includes the wind turbine assembly as described in any one of claims 1-9.

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