A side wall elevation injection package structure of a drum fan

Abstract

The present invention discloses a drum fan side wall vertical shot package structure, which includes a base, an upper cover and a side wall assembly. The side wall assembly is disposed between the base and the upper cover, and the side wall assembly is respectively snap-connected to the base and the upper cover. The side wall assembly includes an inner side wall, an outer side wall and a tongue portion. A plurality of clamping blocks are provided on the outer wall of the outer side wall. The beneficial effects of the present invention: The design of using a three-dimensional side wall vertical shot package structure instead of a two-dimensional side wall planar shot package structure can effectively increase the shot package bonding strength and enhance the overall structural strength of the fan. The internal part of the fan adopts an arc flow channel structure, which increases the air intake efficiency, improves the air volume and air pressure, and effectively reduces the generation of noise.

Description

Technical Field

[0001] The present invention relates to the technical field of drum fans, and specifically to a side wall vertical injection structure of a drum fan. Background Art

[0002] A drum fan is a device that electrically drives the fan blades to rotate around an axis to generate an air flow, and is widely used in fields such as calculators, communication optoelectronic products, frequency converters, refrigeration equipment, etc., for cooling and heat dissipation. Enough air volume of the drum fan is used to take away the heat generated by the equipment system, preventing the electrical or processing performance reduction and life loss caused by the increase in device temperature.

[0003] When the drum fan motor rotates to drive the fan impeller to rotate, the gas between the blades in the impeller also rotates, and these gases are thrown out under the action of centrifugal force. The gas flow rate increases, enabling the gas to convert kinetic energy into static pressure energy during flow, and then with the pressurization of the fluid, the static pressure energy is converted back into velocity energy, and the gas is discharged through the exhaust port. A certain negative pressure is formed in the middle of the impeller. Due to the negative pressure at the inlet, the outside gas is immediately supplemented under the action of atmospheric pressure. Under the continuous rotation of the impeller, gas is continuously discharged and supplemented, thereby achieving the purpose of continuous air blowing.

[0004] The outer frame of a conventional drum fan is mostly a side wall planar injection structure. During use, both the air volume and the air pressure are restricted to a certain extent, affecting the gas flow rate. Moreover, the bonding strength of the side wall planar structure is insufficient, and it is not possible to form rounded corners. The noise is relatively large and cannot be improved, affecting the service life. Summary of the Invention

[0005] The purpose of the present invention is to provide a side wall vertical injection structure of a drum fan to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A side wall vertical injection structure of a drum fan provided by the present invention includes a base, an upper cover, and a side wall assembly. The side wall assembly is disposed between the base and the upper cover, and the side wall assembly is respectively snap-connected to the base and the upper cover. The side wall assembly includes an inner side wall, an outer side wall, and a tongue portion. A plurality of locking blocks are provided on the outer wall of the outer side wall.

[0008] Further preferably, the upper cover includes a cover plate. A first bending portion is provided on one side of the cover plate close to the side wall assembly. A plurality of card slots matching the locking blocks are provided at the lower end of the first bending portion.

[0009] Further preferably, an arc transition is formed between the first bending portion and the cover plate, and the first bending portion and the card slots are located on the same plane.

[0010] Further preferably, one side of the base close to the side wall assembly has a second bending part, and an arc transition is formed between the second bending part and the base. A plurality of avoiding grooves and splicing grooves are formed in the second bending part, and the plurality of avoiding grooves are arranged corresponding to the clamping grooves.

[0011] Further preferably, the first bending part and the second bending part are respectively embedded in the upper and lower ends of the side wall assembly.

[0012] Further preferably, the upper end of the inner side wall protrudes from the outer side wall, and a plurality of splicing blocks are arranged on the inner wall of the inner side wall. The plurality of splicing blocks are arranged corresponding to the splicing grooves and are clamped with the splicing grooves.

[0013] Further preferably, there is a step between the lower end of the inner side wall and the outer side wall, and the plurality of splicing blocks are located at the lower end of the step and are fixedly connected to the outer side wall.

[0014] Further preferably, a plurality of installation grooves are formed in the outer side wall, and the plurality of clamping blocks are embedded in the installation grooves. The outer wall of the outer side wall and the outer wall of the clamping blocks are on the same plane.

[0015] Further preferably, the inner side wall, the outer side wall and the tongue part are of an integrally formed structure.

[0016] Further preferably, the tongue part is arranged on the inner wall of the inner side wall, and the upper and lower ends of the tongue part are respectively in contact connection with the upper cover and the base.

[0017] Beneficial effects: For a side wall vertical surface injection structure of a drum fan, the design of using a three-dimensional side wall vertical surface injection structure to replace the original two-dimensional side wall plane injection structure can effectively increase the injection bonding strength, enhance the overall structural strength of the fan, and extend the service life; the internal part of the fan adopts an arc flow channel structure, which increases the air intake efficiency, improves the air volume and air pressure, and effectively reduces the generation of noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is an exploded schematic diagram of the overall structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the base structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the upper cover structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the side wall assembly structure of the present invention;

[0023] Figure 6 This is the air volume and air pressure test report of the drum fan of the present invention;

[0024] Figure 7 This is the noise test report of the drum fan of the present invention.

[0025] Reference numerals

[0026] 1 - Base, 11 - Second bending part, 111 - Avoidance groove, 112 - Splicing groove, 2 - Upper cover, 21 - Cover plate, 22 - First bending part, 221 - Card slot, 3 - Side wall assembly, 31 - Inner side wall, 311 - Splicing block, 32 - Outer side wall, 321 - Card block, 322 - Installation groove, 33 - Tongue part. Detailed implementation manners

[0027] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0028] Embodiment

[0029] As Figures 1-5 shown, a side wall elevation shooting package structure of a drum fan includes a base 1, an upper cover 2 and a side wall assembly 3. The side wall assembly 3 is arranged between the base 1 and the upper cover 2, and the side wall assembly 3 is respectively clamped with the base 1 and the upper cover 2. The side wall assembly 3 includes an inner side wall 31, an outer side wall 32 and a tongue part 33. A plurality of card blocks 321 are arranged on the outer wall of the outer side wall 32.

[0030] In the first embodiment, the upper cover 2 includes a cover plate 21. A first bending part 22 is arranged on the side of the cover plate 21 close to the side wall assembly 3. A plurality of card slots 221 matching the card blocks 321 are arranged at the lower end of the first bending part 22. The number of the plurality of card blocks 321 is 3, which are respectively arranged at the front end and both sides of the side wall assembly 3. When the upper cover 2 and the side wall assembly 3 are assembled, a stable connection is formed by buckling the card slots 221 corresponding to the card blocks 321. An arc transition is formed between the first bending part 22 and the cover plate 21, and the first bending part 22 and the card slots 221 are located on the same plane. After assembly, the outer sides of the first bending part 22 and the card slots 221 are flush, and the lower end of the first bending part 22 is embedded between the inner side wall 31 and the outer side wall 32 of the side wall assembly 3.

[0031] Embodiment 2: One side of the base 1 close to the side wall assembly 3 has a second bending part 11. There is an arc transition between the second bending part 11 and the base 1. The first bending part 22 and the second bending part 11 are respectively perpendicular to the cover plate 21 of the upper cover 2 and the base 1. A plurality of avoidance grooves 111 and splicing grooves 112 are formed on the second bending part 11. The plurality of avoidance grooves 111 are correspondingly arranged with the clamping grooves 221. When the base 1 and the side wall assembly 3 are assembled, they are correspondingly embedded into the splicing blocks 311 through the plurality of splicing grooves 112 on the second bending part 11, and the avoidance grooves 111 are used to form a plug connection with the installation groove 322 part on the outer side wall 32, so that the inner wall of the assembled drum fan is flat. The first bending part 22 and the second bending part 11 are respectively embedded at the upper and lower ends of the side wall assembly 3.

[0032] Embodiment 3: The upper end of the inner side wall 31 protrudes from the outer side wall 32. A plurality of splicing blocks 311 are arranged on the inner wall of the inner side wall 31. The plurality of splicing blocks 311 are correspondingly arranged with the splicing grooves 112 and are mutually clamped with the splicing grooves 112. The splicing grooves 112 and the splicing blocks 311 are designed in a triangular shape. The flatness of the vertical surface of the assembled drum fan is ensured through the mutually engaged structure, and it has the effect of increasing the bonding strength. There is a step between the lower end of the inner side wall 31 and the outer side wall 32 to avoid the installation space of the second bending part 11 through the step. The plurality of splicing blocks 311 are located at the lower end of the step and are fixedly connected with the outer side wall 32. A plurality of installation grooves 322 are formed on the outer side wall 32. A plurality of clamping blocks 321 are embedded in the installation grooves 322. The size of the installation groove 322 is larger than the size of the clamping groove 221, so that the clamping groove 221 can still be embedded in the installation groove 322 after being buckled into the clamping block 321. The outer wall of the outer side wall 32 and the outer wall of the clamping block 321 are on the same plane. The inner side wall 31, the outer side wall 32 and the tongue part 33 are integrally formed. The tongue part 33 is arranged on the inner wall of the inner side wall 31. The upper and lower ends of the tongue part 33 are respectively in contact connection with the cover plate 21 and the base 1. After the base 1, the upper cover 2 and the side wall assembly 3 are assembled, the verticality of the inner and outer side wall vertical surfaces of the drum fan is ensured, and the structural strength is increased and it is not easy to loosen.

[0033] As Figure 6 shown in the fan air volume and air pressure test report, under the test condition of a set voltage of 12V, as shown in the static pressure and air flow curve graph, the air volume of the side wall vertical surface jet package structure is increased by 1.9%, the air pressure is increased by 1.7%, and the jet package strength is increased by 22.8%, effectively improving the air volume and air pressure and increasing the structural strength.

[0034] As Figure 7As shown, in the fan noise test report, under the test conditions of a set voltage of 12V and a test distance of 0.5M, the rotational speeds of the side wall facade injection package structure and the conventional design structure are 2800 RPM and 3000 RPM respectively. As shown in the test spectrogram, the generated noise ratio is 45.3 dB(A):47.2 dB(A). Therefore, the noise generated by the drum fan side wall facade injection package structure in this technical solution is significantly less than that of the conventional design structure, with the noise reduced by 4.7%, effectively reducing the noise.

[0035] In this technical solution, by adopting the combined structure of injection coating formed by the extension of the peripheries of the upper cover and the base to the facade and then combining with the side wall assembly 3, replacing the structure of side wall flat rubber coating in the conventional design, it breaks through the existing solidified design, increases the structural strength, and uses the design of the arc flow channel to effectively increase the air intake efficiency, improve the air volume and air pressure, and reduce the noise.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A side wall vertical surface jet package structure of a drum fan, characterized in that: It includes a base (1), an upper cover (2) and a side wall assembly (3). The side wall assembly (3) is arranged between the base (1) and the upper cover (2), and the side wall assembly (3) is respectively clamped with the base (1) and the upper cover (2). The side wall assembly (3) includes an inner side wall (31), an outer side wall (32) and a tongue part (33). A plurality of clamping blocks (321) are arranged on the outer wall of the outer side wall (32). The upper cover (2) includes a front plate (21). A first bending part (22) is arranged on one side of the front plate (21) close to the side wall assembly (3). A plurality of clamping grooves (221) matching the clamping blocks (321) are arranged at the lower end of the first bending part (22). An arc transition is formed between the first bending part (22) and the front plate (21), and the first bending part (22) and the clamping grooves (221) are located on the same plane. One side of the base (1) close to the side wall assembly (3) has a second bending part (11). An arc transition is formed between the second bending part (11) and the base (1). A plurality of avoidance grooves (111) and splicing grooves (112) are formed on the second bending part (11). The plurality of avoidance grooves (111) are arranged corresponding to the clamping grooves (221). The first bending part (22) and the second bending part (11) are respectively embedded at the upper and lower ends of the side wall assembly (3). The upper end of the inner side wall (31) protrudes from the outer side wall (32). A plurality of splicing blocks (311) are arranged on the inner wall of the inner side wall (31). The plurality of splicing blocks (311) are arranged corresponding to the splicing grooves (112) and are clamped with the splicing grooves (112). A step is formed between the lower end of the inner side wall (31) and the outer side wall (32). The plurality of splicing blocks (311) are located at the lower end of the step and are fixedly connected with the outer side wall (32). A plurality of installation grooves (322) are formed on the outer side wall (32). The plurality of clamping blocks (321) are embedded in the installation grooves (322). The outer wall of the outer side wall (32) and the outer wall of the clamping blocks (321) are located on the same plane. The inner side wall (31), the outer side wall (32) and the tongue part (33) are of an integrally formed structure. The tongue part (33) is arranged on the inner wall of the inner side wall (31). The upper and lower ends of the tongue part (33) are respectively in contact connection with the upper cover (2) and the base (1).

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