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 volute and a mounting plate, the volute is an injection molding part, the volute is provided with an air outlet, and the air outlet is located in the peripheral side wall of the volute. The mounting plate is arranged in the circumferential direction of the air outlet in a surrounding mode, and the mounting plate and the volute are integrally formed through injection molding. And the mounting plate and the volute are integrally formed through injection molding, so that the assembling procedure of the mounting plate and the volute is reduced. Due to the fact that the injection-molded part is formed through injection molding of the mold, the size precision is high, the flatness of the installation plate is higher, the installation plate is used for being connected with the combustion chamber, the situation that assembly cannot be achieved due to size tolerance superposition of parts is reduced, and the consistency of the installation size is guaranteed. According to the fan assembly, the assembling procedure of the fan assembly is simplified, the size precision is improved, and the consistency of the installation size of the fan assembly is guaranteed. In addition, the volute is arranged to be an injection molding part, compared with a sheet metal part, the corrosion resistance is better, and the competitiveness of the product 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. The fan's outlet is connected to the combustion chamber inside the gas water heater to provide sufficient oxygen for combustion.

[0003] Currently, the fan and combustion chamber are connected via a mounting plate, both of which are sheet metal parts. During assembly, the mounting plate is first fixed to the fan's outlet with a first screw, then fixed to the combustion chamber with a second screw, and finally the fan and combustion chamber are connected to the bottom shell of the gas water heater. This assembly process involves numerous steps, and the sheet metal parts are prone to overlapping dimensional tolerances, leading to misalignment between the first mounting holes of the combustion chamber and the bottom shell of the gas water heater; and / or misalignment between the second mounting holes of the fan and the bottom shell of the gas water heater. Repeated adjustments are required for successful assembly, and the consistency of the gas water heater's installation dimensions cannot be guaranteed. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a fan assembly that can effectively solve the problem that the assembly process of existing fan assemblies is complicated, cannot guarantee the consistency of installation dimensions, and therefore requires repeated adjustments to the assembly; thus achieving the purpose of simplifying the assembly process of the fan assembly and ensuring the consistency of installation dimensions.

[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 installation dimension consistency and low assembly efficiency of existing gas water heaters; and achieve the goal of ensuring the consistency of gas water heater installation dimensions and improving assembly efficiency.

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

[0007] Wind turbine components, including:

[0008] The volute is an injection-molded part, and the volute has an air outlet located on the peripheral sidewall of the volute.

[0009] An mounting plate is arranged around the circumference of the air outlet, and the mounting plate is integrally injection molded with the volute. The mounting plate is used to connect the combustion chamber.

[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 uses a volute as an injection-molded part, and a mounting plate is provided circumferentially around the air outlet on the peripheral sidewall of the volute. The mounting plate and the volute are integrally injection-molded, reducing the assembly process between the mounting plate and the volute. Because the injection-molded part is formed by a mold, it has high dimensional accuracy, and the mounting plate has higher flatness. When the air outlet is connected to the combustion chamber through the mounting plate, it reduces the occurrence of assembly failures caused by overlapping dimensional tolerances of parts, ensuring the consistency of installation dimensions. This fan assembly not only simplifies the assembly process but also improves dimensional accuracy, ensuring the consistency of installation dimensions. Furthermore, using an injection-molded volute provides better corrosion resistance compared to sheet metal parts, enhancing the product's competitiveness.

[0012] In one embodiment, the volute includes a volute body and a volute cover plate, and the fan assembly further includes a first U-shaped mounting frame and a second U-shaped mounting frame, wherein the first U-shaped mounting frame is integrally formed with the volute body and the second U-shaped mounting frame is integrally formed with the volute cover plate.

[0013] The volute cover plate is sealed to the volute body, so that the opening of the first U-shaped mounting frame and the opening of the second U-shaped mounting frame are aligned to form the air outlet.

[0014] 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.

[0015] In one embodiment, a first arc surface is provided at the connection between the first U-shaped mounting frame and the volute body, and the first arc surface extends along the height direction of the first U-shaped mounting frame.

[0016] A second arc surface is provided at the connection between the second U-shaped mounting frame and the volute cover plate, and the second arc surface extends along the length direction of the second U-shaped mounting frame.

[0017] In one embodiment, a connecting block is provided at the end of the first U-shaped mounting frame away from the second U-shaped mounting frame, the connecting block being used to be inserted and fixed to the connecting end of the combustion chamber; a connecting plate is provided at the end of the second U-shaped mounting frame away from the first U-shaped mounting frame, the connecting plate being used to be fastened to the connecting end of the combustion chamber.

[0018] In one embodiment, a seal is adhered to the mounting plate, the seal being disposed around the circumference of the air outlet.

[0019] In one embodiment, the mounting plate is provided with a sealing groove, the sealing groove surrounds the circumference of the air outlet and communicates with the air outlet, and the sealing element is disposed in the sealing groove.

[0020] In one embodiment, two positioning posts are provided in the sealing groove, and the two positioning posts are respectively provided on opposite sides of the air outlet; the sealing element is provided with two positioning holes, and the two positioning posts and the two positioning holes are tightly fitted in a one-to-one correspondence.

[0021] In one embodiment, the height h of the positioning post is less than the depth d1 of the positioning hole, and h = d1 / 2 to 2d1 / 3;

[0022] And / or, the thickness t of the seal is greater than the depth d2 of the sealing groove, and d2 = t / 2 to 2t / 3.

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

[0024] A gas water heater includes a combustion chamber and a fan assembly as described in any of the above embodiments, wherein the air outlet of the fan assembly is connected to the combustion chamber via the mounting plate.

[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 utilizes the aforementioned fan assembly. The volute of this fan assembly is injection molded integrally with the mounting plate. The mounting plate connects the air outlet of the fan assembly to the combustion chamber, improving dimensional accuracy and reducing assembly steps. This ensures the consistency of the fan assembly's installation dimensions, thereby guaranteeing more stable operation and reducing resonance between the fan assembly and the bottom shell of the gas water heater, resulting in lower noise. Furthermore, the fan assembly exhibits better corrosion resistance, enhancing the product's competitiveness. 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 fan assembly provided in a specific embodiment of this utility model;

[0029] Figure 2 This is an exploded view of the volute provided in a specific embodiment of this utility model;

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

[0031] Figure 4 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.

[0032] In the picture:

[0033] 1. Volute housing; 11. Volute housing body; 111. Positioning female stop; 112. First connecting lug; 1121. First connecting hole; 113. Mounting groove; 114. Mounting foot; 12. Volute housing cover plate; 121. Positioning male stop; 122. Second connecting lug; 1221. Second connecting hole; 123. Air inlet; 13. Air outlet; 14. Fastening components;

[0034] 2. Mounting plate; 21. First U-shaped mounting frame; 211. Connecting block; 22. Second U-shaped mounting frame; 221. Connecting plate; 2211. Third connecting hole; 23. Sealing groove; 231. Positioning post;

[0035] 31. First arc surface; 32. Second arc surface;

[0036] 4. Sealing element; 41. Locating hole;

[0037] 5. Wind turbine;

[0038] 6. Motor; 61. Rotor; 62. Stator. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] like Figures 1-3As shown, this embodiment provides a fan assembly, including a volute 1, a rotor 5, and a motor 6. The rotor 5 is disposed inside the volute 1, and the shaft of the motor 6 is connected to the rotor 5. The volute 1 has an air inlet 123 and an air outlet 13. An air duct is formed between the rotor 5 and the inner wall of the volute 1. The air duct is connected to both the air inlet 123 and the air outlet 13. The motor 6 drives the rotor 5 to rotate, which can draw external air into the volute 1 from the air inlet 123. The air duct is used to collect the gas discharged from the rotor 5, converting the kinetic energy of the gas into static pressure energy, and at the same time guiding the airflow to the air outlet 13, so that the airflow flows out smoothly.

[0042] The volute 1 is an injection molded part, made of plastic material. For example, the plastic material is thermoplastic or thermosetting plastic. In this embodiment, the volute 1 is injection molded from bulk or granular plastic (BMC). BMC is a thermosetting plastic that is resistant to high temperature, has good thermal stability, strong corrosion resistance, and high dimensional accuracy after integral molding.

[0043] The fan assembly provided in this embodiment also includes a mounting plate 2. The air outlet 13 is located on the peripheral sidewall of the volute 1. The mounting plate 2 surrounds the circumference of the air outlet 13 and is integrally injection molded with the volute 1. The mounting plate 2 is used to connect the combustion chamber. This fan assembly not only simplifies the assembly process but also improves dimensional accuracy, ensuring the consistency of the fan assembly's installation dimensions. In addition, the volute 1 is made of injection molded material, which has better corrosion resistance than sheet metal parts, improving the product's competitiveness.

[0044] In one embodiment, the volute 1 includes a volute body 11 and a volute cover plate 12. During production, the volute body 11 and the volute cover plate 12 are injection molded separately. One side of the volute body 11 is set as an open side. During assembly, the impeller 5 is installed inside the volute body 11 through the open side, and then the volute cover plate 12 is sealed to the volute body 11. The fan assembly also includes a first U-shaped mounting frame 21 and a second U-shaped mounting frame 22. The first U-shaped mounting frame 21 is integrally formed with the volute body 11, and the second U-shaped mounting frame 22 is integrally formed with the volute cover plate 12. The volute cover plate 12 is sealed to the volute body 11, so that the opening of the first U-shaped mounting frame 21 and the opening of the second U-shaped mounting frame 22 are aligned to form an air outlet 13. The injection-molded first U-shaped mounting frame 21 and the second U-shaped mounting frame 22 have high dimensional accuracy, thus ensuring the dimensional accuracy of the mounting plate 2 formed after alignment, thereby ensuring the installation consistency of the fan assembly.

[0045] In one embodiment, a female positioning stop 111 is provided on the opening side of the volute body 11, and a male positioning stop 121 is provided on the outer periphery of the volute cover plate 12. The female positioning stop 111 and the male positioning stop 121 cooperate for positioning; this ensures the accuracy of the connection position between the volute cover plate 12 and the volute body 11, thereby ensuring the accuracy of the docking position between the opening of the first U-shaped mounting frame 21 and the opening of the second U-shaped mounting frame 22, and further improving the consistency of the installation dimensions of the mounting plate 2.

[0046] Specifically, the fan assembly also includes a fastening component 14. A first connecting lug 112 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 112 and the second connecting lug 122 are fitted together and then fixed by the fastening component 14. The first connecting lug 112 is provided with a first connecting hole 1121, and the second connecting lug 122 is provided with a second connecting hole 1221. 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 112 and the second connecting lug 122 are fitted together, the first connecting hole 1121 and the second connecting hole 1221 are aligned. A sealing ring is provided between the volute body 11 and the volute cover plate 12. The fastening component 14 includes a fastening bolt and a nut. The fastening bolt passes through the first connecting hole 1121 and the second connecting hole 1221 in sequence and is then fixed by the nut, which squeezes the sealing ring 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.

[0047] Before the volute body 11 and volute cover plate 12 are fixed by the fastening component 14, the positioning female stop 111 and the positioning male stop 121 are matched for positioning to achieve axial positioning of the volute body 11 and volute cover plate 12; then the first connecting hole 1121 and the second connecting hole 1221 are aligned to achieve circumferential positioning of the volute body 11 and volute cover plate 12, and finally fixed by the fastening component 14 to ensure the accuracy of the connection position of the volute cover plate 12 and volute body 11, further ensuring the airtightness of the air duct, as well as the accuracy of the docking position of the opening of the first U-shaped mounting frame 21 and the opening of the second U-shaped mounting frame 22.

[0048] In one embodiment, continue to refer to Figure 2The connection between the first U-shaped mounting frame 21 and the volute body 11 is configured as a first arc surface 31, which extends along the height direction of the first U-shaped mounting frame 21; the connection between the second U-shaped mounting frame 22 and the volute cover plate 12 is configured as a second arc surface 32, which extends along the length direction of the second U-shaped mounting frame 22. Since the mounting plate 2 is used to connect with the combustion chamber, the first arc surface 31 and the second arc surface 32 are set perpendicularly to reduce stress concentration between the mounting plate 2 and the volute 1, and to prevent the mounting plate 2 from being subjected to excessive force, which could cause the connection between the mounting plate 2 and the volute 1 to break.

[0049] In one embodiment, a connecting block 211 is provided at the end of the first U-shaped mounting frame 21 away from the second U-shaped mounting frame 22. The connecting block 211 is used to insert and fix it to the connection end of the combustion chamber. A connecting plate 221 is provided at the end of the second U-shaped mounting frame 22 away from the first U-shaped mounting frame 21. The connecting plate 221 is used to fasten to the connection end of the combustion chamber. The connecting block 211 is arranged parallel to the plane of the first U-shaped mounting frame 21, and the connecting plate 221 is arranged perpendicular to the plane of the second U-shaped mounting frame 22. Third connecting holes 2211 are provided at both ends of the connecting plate 2211. The connection end of the combustion chamber is provided with a connecting groove adapted to the connecting block 211 and a connecting lug corresponding to the third connecting hole 2211. When the blower assembly is installed at the connection end of the combustion chamber, the connecting block 211 is inserted into the connecting groove, and then two screws are passed through the third connecting hole 2211 and the fourth connecting hole on the connecting lug, and then fixed with a nut. The assembly is simple and the assembly efficiency is improved.

[0050] To ensure the sealing between the mounting plate 2 and the combustion chamber, a sealing element 4 is adhered to the mounting plate 2, and the sealing element 4 surrounds the air outlet 13.

[0051] In one embodiment, such as Figure 1 and Figure 3 As shown, the mounting plate 2 is provided with a sealing groove 23, which surrounds and communicates with the air outlet 13. The sealing element 4 is disposed within the sealing groove 23. The sealing groove 23 provides a certain limiting effect on the sealing element 4, preventing poor sealing caused by inconsistent bonding positions of the sealing element 4. Since the sealing groove 23 communicates with the air outlet 13, the sealing element 4 can surround the circumference of the air outlet 13, further improving the sealing performance.

[0052] In one embodiment, two positioning posts 231 are provided in the sealing groove 23, and the two positioning posts 231 are respectively located on opposite sides of the air outlet 13; the sealing element 4 is provided with two positioning holes 41, and the two positioning posts 231 and the two positioning holes 41 are tightly fitted in a one-to-one correspondence. Through the tight fit between the positioning posts 231 and the positioning holes 41, the sealing element 4 can be quickly and accurately bonded during the production process, which plays a role in preventing mistakes, greatly reducing the production error rate, and improving production efficiency.

[0053] To avoid the positioning post 231 being too high and the sealing groove 23 being too deep, which would affect the compression of the seal 4 and thus its sealing performance, in one embodiment, the height h of the positioning post 231 is less than the depth d1 of the positioning hole 41, and h = d1 / 2 to 2d1 / 3; and / or, the thickness t of the seal 4 is greater than the depth d2 of the sealing groove 23, and d2 = t / 2 to 2t / 3. After the mounting plate 2 is connected and fixed to the connection end of the combustion chamber, the seal 4 is squeezed between the connection end of the mounting plate 2 and the combustion chamber. The seal 4 is compressed, and its thickness is reduced, thus improving the sealing performance.

[0054] In one embodiment, such as Figure 3 and Figure 4 As shown, the impeller 5 is also an injection molded part. The motor 6 includes a rotor 61 and a stator 62. The rotor 61 and the impeller 5 are injection molded as one piece. The impeller 5 has a multi-blade structure. The rotor 61 is a plastic magnetic rotor. The plastic magnetic rotor is a multi-stage integrated injection molded magnetic ring. The plastic magnetic rotor and the shaft are placed in the injection mold and injection molded to form the impeller rotor. The stator 62 is injection molded as one piece with the volute 1.

[0055] In one embodiment, such as Figure 1 and Figure 3 As shown, an installation groove 113 is provided on the outer periphery of the volute body 11, and an installation foot 114 is provided in the installation groove 113. The fan assembly is connected to the bottom shell of the gas water heater through the installation foot 114.

[0056] This embodiment also provides a gas water heater, including a combustion chamber and a fan assembly as described above. The air outlet 13 of the fan assembly is connected to the combustion chamber via a mounting plate 2. The volute 1 of the fan assembly and the mounting plate 2 are injection molded as a single unit, improving dimensional accuracy and reducing assembly steps; ensuring the consistency of the fan assembly's installation dimensions, thereby ensuring more stable operation of the fan assembly, reducing the resonance problem between the fan assembly and the bottom shell of the gas water heater, and resulting in lower noise. In addition, the fan assembly has better corrosion resistance, improving the product's competitiveness.

[0057] 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 volute (1) is an injection molded part, and the volute (1) has an air outlet (13) located on the peripheral sidewall of the volute (1). Mounting plate (2) is arranged around the circumference of the air outlet (13), and the mounting plate (2) is integrally injection molded with the volute (1). The mounting plate (2) is used to connect the combustion chamber.

2. The wind turbine assembly according to claim 1, characterized in that, The volute (1) includes a volute body (11) and a volute cover plate (12). The fan assembly also includes a first U-shaped mounting frame (21) and a second U-shaped mounting frame (22). The first U-shaped mounting frame (21) is integrally formed with the volute body (11), and the second U-shaped mounting frame (22) is integrally formed with the volute cover plate (12). The volute cover plate (12) is sealed to the volute body (11), so that the opening of the first U-shaped mounting frame (21) and the opening of the second U-shaped mounting frame (22) are connected to form the air outlet (13).

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 (121) on its outer periphery. The female positioning stop (111) and the male positioning stop (121) are positioned together.

4. The wind turbine assembly according to claim 2, characterized in that, A first arc surface (31) is provided at the connection between the first U-shaped mounting frame (21) and the volute body (11), and the first arc surface (31) extends along the height direction of the first U-shaped mounting frame (21); A second arc surface (32) is provided at the connection between the second U-shaped mounting frame (22) and the volute cover plate (12), and the second arc surface (32) extends along the length direction of the second U-shaped mounting frame (22).

5. The wind turbine assembly according to claim 2, characterized in that, A connecting block (211) is provided at the end of the first U-shaped mounting frame (21) away from the second U-shaped mounting frame (22), and the connecting block (211) is used to be inserted and fixed to the connecting end of the combustion chamber; a connecting plate (221) is provided at the end of the second U-shaped mounting frame (22) away from the first U-shaped mounting frame (21), and the connecting plate (221) is used to be fastened to the connecting end of the combustion chamber.

6. The wind turbine assembly according to claim 1, characterized in that, A sealing element (4) is adhered to the mounting plate (2), and the sealing element (4) surrounds the circumference of the air outlet (13).

7. The wind turbine assembly according to claim 6, characterized in that, The mounting plate (2) is provided with a sealing groove (23), which surrounds the air outlet (13) and communicates with the air outlet (13). The sealing element (4) is provided in the sealing groove (23).

8. The wind turbine assembly according to claim 7, characterized in that, The sealing groove (23) is provided with two positioning posts (231), which are respectively located on opposite sides of the air outlet (13); the sealing member (4) is provided with two positioning holes (41), and the two positioning posts (231) and the two positioning holes (41) are tightly fitted in a one-to-one correspondence.

9. The wind turbine assembly according to claim 8, characterized in that, The height h of the positioning post (231) is less than the depth d1 of the positioning hole (41), and h = d1 / 2 ~ 2d1 / 3; And / or, the thickness t of the seal (4) is greater than the depth d2 of the sealing groove (23), and d2 = t / 2 ~ 2t / 3.

10. A gas-fired water heater, characterized in that, It includes a combustion chamber and a fan assembly as described in any one of claims 1-9, wherein the air outlet (13) of the fan assembly is connected to the combustion chamber via the mounting plate (2).

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