Air duct heating structure of fan

Abstract

An air duct heating structure of a fan belongs to the technical field of fans and comprises a side plate, a support, a motor, a motor shaft, shaft bearing rubber, a volute, a volute tongue and an impeller, and the motor and the side plate are fixedly connected with the support. The volute and the volute tongue are fixedly connected with the side plate; the inner wall of the volute is of a heating layer structure, the heating layer structure is of a composite layer structure, and the composite layer structure sequentially comprises a volute body layer, an insulating layer A, a heating film layer and an insulating layer B from outside to inside; the insulating layer A is connected with the volute body layer in a spraying mode, the heating film layer is connected with the insulating layer A in a spraying mode, and the insulating layer B is connected with the heating film layer in a spraying mode. The thickness of the heating layer is 0.2 to 0.5 mm; the heating film layer is a whole heating film layer or a back-and-forth bending heating film layer; a power line A and a power line B are arranged at the two ends of the heating film layer respectively and connected with the positive electrode and the negative electrode of an external power source respectively. The utility model has the advantages of simple structure and low production cost, and is beneficial to popularization.

Description

Technical Field

[0001] The utility model discloses a warm air structure of a fan, in particular to an air duct heating structure of the fan, belonging to the technical field of fans. Background Art

[0002] The heaters currently on the market that use cross-flow fans usually install heating devices before or after the fan wheel of the cross-flow fan, so that the heating devices affect the air intake of the fan and the wind speed; and the overall product size is too large, affecting the appearance and being very inconvenient to carry.

[0003] In order to overcome the defects of the above-mentioned cross-flow fan heater, the publication number is CN 117847776 A, and the utility model name is a self-heating wind wheel and heater, which provides a technical solution: wherein the self-heating wind wheel includes a rotating power component, a self-heating blowing component and two rotating conductive mounting structures, the rotating conductive mounting structure includes an insulating sleeve, a conductive sleeve, a heat sink, a conductive ring, a heat sink ring and a conductive ring fixing component, the self-heating blowing component includes a connecting shaft, two mounting plates, a mounting chassis, a plurality of self-heating blades and a conductive metal sheet, and both ends of each self-heating blade are connected to the corresponding conductive metal sheet. The conductive ring connects external electrical energy to the conductive metal sheet through the conductive sleeve, and introduces it into the plurality of self-heating blades through the conductive metal sheet, so that the plurality of self-heating blades can generate heat, and the plurality of self-heating blades can generate heat while rotating.

[0004] The structures of the above-mentioned self-heating fan wheel and heater are too complicated, which greatly increases the production cost and is not conducive to promotion and application. Utility Model Content

[0005] The purpose of the present utility model is to provide a duct heating structure for a fan, which can achieve a simple structure, significantly reduce production costs, and be conducive to the purpose of promotion and application, in order to address the defects in the existing technology of the above-mentioned fan heater, such as overly complex structure, which greatly increases production costs and is not conducive to promotion and application.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a duct heating structure of a fan, comprising a side plate, a bracket, a motor, a motor shaft, a shaft support rubber, a volute, a volute tongue and an impeller, wherein the motor is fixedly connected to the bracket from the outside of the side plate through the motor shaft; the ends of the volute and the volute tongue are fixedly connected to the inside of the side plate, the volute and the volute tongue are arranged opposite to each other, and an air cavity is formed between the volute and the volute tongue;

[0007] The inner wall of the volute is a heating layer structure, and the heating layer structure is a composite layer structure, which is composed of a volute body layer, an insulating layer A, a heating film layer, and an insulating layer B from the outside to the inside.

[0008] The insulating layer A is connected to the volute body layer by spraying, the heating film layer is connected to the insulating layer A by spraying, and the insulating layer B is connected to the heating film layer by spraying;

[0009] The thickness S of the heating layer is 0.2 to 0.5 mm;

[0010] The heating film layer is a whole heating film layer or a heating film layer that is bent back and forth; the two ends of the heating film layer are respectively provided with a power line A and a power line B, and the power line A and the power line B are respectively connected to the positive and negative poles of the external power supply;

[0011] In this way, a heating film layer is added to the inner surface of the volute of the cross-flow fan without changing the structure of the cross-flow fan, thereby achieving the purpose of arranging a heating structure in the air duct of the cross-flow fan at a low cost.

[0012] The side panel is provided with a flower hole, and the bracket is provided with a rotating foot. The bracket is tightened by rotating the rotating foot and the flower hole and is tightly matched with the side panel; the lower part of the shaft rubber is fixedly connected to the inner side of the side panel, and the motor shaft passes through the center hole of the side panel and enters the air cavity. The center hole of the shaft rubber is sleeved on the motor shaft and tightly connected; the impeller is sleeved on the step in the middle section of the shaft rubber through the impeller disk and is tightly connected; when the motor is started, the motor shaft drives the impeller to rotate through the shaft rubber.

[0013] The thickness S of the heating layer is 0.3 mm.

[0014] The heating film layer is a whole heating film layer. At this time, the power line A and the power line B are arranged at both sides of one end of the whole heating film layer. Of course, the power line A and the power line B can also be arranged at the diagonal ends of the two ends of the whole heating film layer.

[0015] The heating film layer is a back-and-forth bending heating film layer. In this case, the power line A and the power line B are arranged at both sides of one end of the back-and-forth bending heating film layer.

[0016] The insulating layer A and the insulating layer B are polyurethane primer or epoxy resin primer.

[0017] The heating layer is a metal electric heating layer, a PTC electric heating layer, a graphene electric heating layer or a carbon nanotube thin mold layer.

[0018] The heating layer is a metal electric heating layer, specifically an aluminum alloy electric heating layer, and the insulating layer A and the insulating layer B are both polyurethane primers.

[0019] Working principle: When power cord A and power cord B are connected to an external power supply, the heating film layer is energized and heated, and the generated heat diffuses into the air duct and impeller. At the same time, the impeller rotates driven by the motor to form hot air, which is blown out from the air outlet between the volute air guide plate at the front end of the volute and the vortex tongue air guide plate at the front end of the vortex tongue to the room for people to keep warm.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) Directly design the inner wall of the fan's volute to be a heating composite layer structure. When the heating layer is powered on, the heating film layer is heated by electricity, and the generated heat diffuses into the air duct and impeller. At the same time, the impeller rotates under the drive of the motor, forming hot air. In this way, a heating film layer is added to the inner surface of the fan's volute without changing the fan's structure, and the purpose of setting up a heating structure in the fan's air duct is achieved. It is low cost and easy to promote and apply.

[0022] (2) This heating composite layer structure can be applied to any fan with a volute, such as a cross-flow fan and a centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Yes: A three-dimensional diagram of the present invention (without impeller, without insulation layer B, and the heating film layer is a whole heating film layer);

[0024] Figure 2 Yes: A three-dimensional diagram of Example 2 (without impeller, without insulation layer B, and the heating film layer is a heating film layer that is bent back and forth);

[0025] Figure 3 Yes: A three-dimensional diagram of the utility model (with an impeller and a whole heating film layer);

[0026] Figure 4 Yes: an enlarged left view of the utility model;

[0027] Figure 5 yes: Figure 4 Magnified view of part A.

[0028] Explanation of the accompanying drawings: side panel 1, bracket 2, motor 3, motor shaft 4, shaft bearing rubber 5, volute 6, volute tongue 7, impeller 8, volute body layer 9, insulation layer A10, heating film layer 11, insulation layer B12, flower hole 13, power cord A14, power cord B15. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The "left, right, front, and back" described in this embodiment are for the convenience of description. Technical solutions with opposite directions and the same structure are all within the scope of protection of this application.

[0030] Example 1:

[0031] like Figures 1 to 5 As shown, a fan duct heating structure, such as Figures 1 to 4 As shown, it includes a side plate 1, a bracket 2, a motor 3, a motor shaft 4, a shaft support rubber 5, a volute 6, a vortex tongue 7 and an impeller 8. The motor 3 is fixedly connected to the bracket 2 from the outside of the side plate 1 through the motor shaft 4; the ends of the volute 6 and the vortex tongue 7 are fixedly connected to the inside of the side plate 1, and the volute 6 and the vortex tongue 7 are arranged opposite to each other, and a wind cavity is formed between the volute 6 and the vortex tongue 7;

[0032] like Figure 5 As shown, the inner wall of the volute 6 is a heating layer structure, and the heating layer structure is a composite layer structure, which is composed of a volute body layer 9, an insulating layer A10, a heating film layer 11, and an insulating layer B12 from the outside to the inside.

[0033] The insulating layer A10 is connected to the volute body layer 9 by spraying, the heating film layer 11 is connected to the insulating layer A10 by spraying, and the insulating layer B12 is connected to the heating film layer 11 by spraying;

[0034] The thickness S of the heating layer is 0.3 mm;

[0035] The heating film layer 11 is a whole heating film layer; power lines A14 and B15 are respectively provided at the two ends of the heating film layer, and the power lines A14 and B15 are respectively connected to the positive and negative poles of an external power supply.

[0036] In this way, a heating film layer 11 is added to the inner surface of the volute 6 of the cross-flow fan without changing the structure of the cross-flow fan, thereby achieving the purpose of arranging a heating structure in the air duct of the cross-flow fan at a low cost.

[0037] like Figures 1 to 4 As shown, the side panel 1 is provided with a flower hole 13, and the bracket 2 is provided with a rotating foot. The bracket 2 is tightened by rotating the rotating foot and the flower hole and is tightly matched with the side panel 1; the lower part of the shaft-bearing rubber 5 is fixedly connected to the inner side of the side panel 1, and the motor shaft 4 passes through the center hole of the side panel 1 and enters the wind cavity. The center hole of the shaft-bearing rubber 5 is sleeved on the motor shaft 4 and tightly connected; the impeller 8 is sleeved on the step in the middle section of the shaft-bearing rubber 5 through the impeller 8 disk and is tightly connected; when the motor is started, the motor shaft 4 drives the impeller 8 to rotate through the shaft-bearing rubber 5.

[0038] like Figure 1 As shown, when the heating film layer 11 is a whole heating film layer, the power line A14 and the power line B15 are arranged at both sides of one end of the whole heating film layer. Of course, the power line A14 and the power line B15 can also be arranged at the diagonally opposite ends of the whole heating film layer 11.

[0039] like Figure 5As shown, the heating layer is an aluminum alloy electric heating layer, and the insulating layer A10 and the insulating layer B12 are both polyurethane primers.

[0040] Working principle: Figure 3 As shown, when the power cord A14 and the power cord B15 are connected to an external power supply, the heating film layer 11 is energized and heated, and the generated heat diffuses into the air duct and the impeller 8. At the same time, the impeller 8 rotates under the drive of the motor 3 to form hot air, which is blown out from the air outlet between the volute 6 air guide plate at the front end of the volute 6 and the vortex tongue 7 air guide plate at the front end of the vortex tongue 7 to the room for people to keep warm.

[0041] Example 2:

[0042] like Figure 2 As shown, the heating film layer 11 is a back-and-forth bending heating film layer 11 . At this time, the power line A 14 and the power line B 15 are arranged on both sides of one end of the back-and-forth bending heating film layer 11 .

[0043] The rest is the same as Example 1.

[0044] The embodiments described above are only preferred implementations of the present invention. Any common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan duct heating structure, comprising a side panel, a bracket, a motor, a motor shaft, a shaft support rubber, a volute, a volute tongue, and an impeller, wherein the motor is fixedly connected to the bracket from the outside of the side panel via the motor shaft; the ends of the volute and volute tongue are fixedly connected to the inside of the side panel, the volute and volute tongue are arranged opposite each other, and an air cavity is formed between the volute and volute tongue; and characterized in that: The inner wall of the volute is a heating layer structure, and the heating layer structure is a composite layer structure, which is composed of a volute body layer, an insulating layer A, a heating film layer, and an insulating layer B from the outside to the inside. The insulating layer A is connected to the volute body layer by spraying, the heating film layer is connected to the insulating layer A by spraying, and the insulating layer B is connected to the heating film layer by spraying; The thickness of the heating layer is 0.2 to 0.5 mm; The heating film layer is a whole heating film layer or a heating film layer bent back and forth; the two ends of the heating film layer are respectively provided with a power line A and a power line B, and the power line A and the power line B are respectively connected to the positive and negative poles of the external power supply.

2. The air duct heating structure of a fan according to claim 1, characterized in that: The side panel is provided with a flower hole, and the bracket is provided with a rotating foot. The bracket is tightened by rotating the rotating foot and the flower hole and is tightly matched with the side panel; the lower part of the shaft rubber is fixedly connected to the inner side of the side panel, and the motor shaft passes through the center hole of the side panel and enters the air cavity. The center hole of the shaft rubber is sleeved on the motor shaft and tightly connected; the impeller is sleeved on the step of the middle section of the shaft rubber through the impeller disk and is tightly connected.

3. The air duct heating structure of a fan according to claim 1, characterized in that: The thickness of the heating layer is 0.3 mm.

4. The air duct heating structure of a fan according to claim 1, characterized in that: The heating film layer is a whole heating film layer, and the power line A and the power line B are arranged on both sides of one end of the whole heating film layer.

5. The air duct heating structure of a fan according to claim 1, characterized in that: The heating film layer is a back-and-forth bending heating film layer, and the power line A and the power line B are arranged at both sides of one end of the back-and-forth bending heating film layer.

6. The air duct heating structure of a fan according to claim 1, characterized in that: The insulating layer A and the insulating layer B are polyurethane primer or epoxy resin primer.

7. The air duct heating structure of a fan according to claim 1, characterized in that: The heating layer is a metal electric heating layer, a PTC electric heating layer, a graphene electric heating layer or a carbon nanotube thin mold layer.

8. The air duct heating structure of a fan according to any one of claims 6 or 7, characterized in that: The heating layer is an aluminum alloy electric heating layer, and the insulating layer A and the insulating layer B are both polyurethane primers.

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