Hot air generating device

Abstract

The present invention discloses a hot air generating device, comprising a fan, a tube body, a bracket and an electric heating wire. The air outlet of the fan is connected to the tube body, the electric heating wire is wound on the bracket, the bracket is formed with an axial through hole, a core column is arranged through the axial through hole, a first support ring is sleeved outside a first fixing nut, a first support rod is screwed to the first support ring, the first fixing nut is screwed to one end of the core column, one end of the first support rod is close connected to the first fixing nut, and the other end of the first support rod is close connected to the inner wall of the tube body; the second support ring is sleeved outside the second fixing nut, the second support rod is screwed to the second support ring, the second fixing nut is screwed to the other end of the core column, one end of the second support rod is close connected to the second fixing nut, and the other end of the second support rod is close connected to the inner wall of the flange; the hot air generating device of the present invention has a reasonable structure and high performance.

Description

Technical Field

[0001] The invention relates to the field of hot air generators, and in particular to a hot air generating device. Background Art

[0002] In the furniture manufacturing industry, in order to cover the cutting edge of the board and make the board beautiful, the edge of the board needs to be painted. In some cases, the painted board also needs hot air drying. The existing hot air generator is used to generate hot air. The hot air generator mainly includes a fan and an electric heating wire. The electric heating wire is arranged in a section of the pipeline. In order to form a three-dimensional structure of the electric heating wire, the electric heating wire is wound on an insulating bracket. The airflow discharged from the air outlet of the fan flows through the pipeline provided with the electric heating wire, so the airflow is quickly heated to form hot air. In order to adapt to different application occasions, the inner diameter specifications of the pipeline are different, and the existing technology does not have a reasonable structure that can support the bracket in the pipeline. The electric heating wire and the bracket are difficult to be arranged in the middle position of the pipeline, resulting in a poor heating effect on the airflow. The performance of the hot air generator of the existing technology is low. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a hot air generating device which has a simple and reasonable structure and high performance.

[0004] The purpose of the present invention is achieved through the following technical solutions.

[0005] The hot air generating device disclosed in the present invention comprises a fan, a tube body, a bracket and a heating wire. The air outlet of the fan is connected to the tube body, the heating wire is wound on the bracket, and the bracket and the heating wire are arranged in the tube body.

[0006] The present invention also includes a first radial positioning component, a second radial positioning component, a flange and a core column. The bracket is formed with an axial through hole, the core column is arranged through the axial through hole, one end of the flange is connected to the fan, and the other end of the flange corresponding to the flange is connected to one end of the tube body.

[0007] The first radial positioning assembly includes a first support ring, a first fixing nut and a first strut for supporting the bracket, the first support ring is sleeved outside the first fixing nut, the number of the first struts is set to at least three, the first strut is threadedly connected to the first support ring, the first fixing nut is threadedly connected to one end of the core column, one end of the first strut is abuttedly connected to the first fixing nut, and the other corresponding end of the first strut is abuttedly connected to the inner wall of the tube body.

[0008] The second radial positioning assembly includes a second support ring, a second fixing nut and a second strut for supporting the bracket, the second support ring is sleeved outside the second fixing nut, the number of the second strut is set to at least three, the second strut is threadedly connected to the second support ring, the second fixing nut is threadedly connected to the other end corresponding to the core column, one end of the second strut is abuttedly connected to the second fixing nut, and the other end corresponding to the second strut is abuttedly connected to the inner wall of the flange.

[0009] The first support rods are evenly distributed around the circumference with the axis of the first support ring as the center, and the second support rods are evenly distributed around the circumference with the axis of the second support ring as the center.

[0010] The bracket is disposed between the first fixing nut and the second fixing nut.

[0011] Preferably, the flange is threaded with an axial positioning screw, the axial positioning screw is arranged through the flange, and the end of the axial positioning screw is abutted and connected with the end of the corresponding second support rod.

[0012] Preferably, the first radial positioning assembly further comprises a first locking nut, the first locking nut is threadedly connected to the corresponding first strut, and the first locking nut is abuttedly connected to the first support ring, and the second radial positioning assembly further comprises a second locking nut, the second locking nut is threadedly connected to the corresponding second strut, and the second locking nut is abuttedly connected to the second support ring.

[0013] Preferably, the first fixing nut and the second fixing nut are both configured as external hexagonal nuts, and the number of the first support rod and the number of the second support rod are each set to three.

[0014] Preferably, the first support ring is closely connected to one end of the bracket, and the second support ring is closely connected to the other end of the bracket corresponding to the bracket.

[0015] Preferably, the bracket includes a first plate portion and a second plate portion, a middle portion of the first plate portion is integrally connected with a middle portion of the second plate portion, and the first plate portion is perpendicular to the second plate portion.

[0016] Preferably, the first plate portion and the second plate portion are respectively formed with positioning grooves for accommodating the heating wire.

[0017] Preferably, the tube body is wrapped with heat insulating cotton.

[0018] Preferably, the air inlet of the fan is provided with an air inlet filter.

[0019] Compared with the prior art, the present invention has the following beneficial effects: by providing the first radial positioning assembly and the second radial positioning assembly, the bracket wrapped with the heating wire is supported in the tube body, the structure is simple and reasonable, and the performance of the hot air generating device of the present invention is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the hot air generating device of the present invention.

[0021] Figure 2 It is a left-side structural schematic diagram of the hot air generating device of the present invention.

[0022] Figure 3 It is a schematic cross-sectional structural diagram of the combination of the flange, the tube body, the bracket, the heating wire, the first radial positioning component and the second radial positioning component of the present invention.

[0023] Figure 4 It is a schematic top view of the structure of the tube body, the bracket and the first radial positioning component combination of the present invention.

[0024] Figure 5 It is a schematic diagram of the top view of the structure of the combination of the bracket and the heating wire of the present invention.

[0025] Explanation of reference numerals: 1-fan; 2-flange; 21-flange pipe; 22-flange plate; 3-tube body; 31-insulation cotton; 4-bracket; 41-first plate; 42-second plate; 401-positioning groove; 402-axial through hole; 5-heating wire; 6-first radial positioning assembly; 61-first support ring; 62-first fixing nut; 63-first strut; 64-first locking nut; 7-second radial positioning assembly; 71-second support ring; 72-second fixing nut; 73-second strut; 74-second locking nut; 8-core column; 9-axial positioning screw; 10-elbow; 11-air duct; 12-mounting seat; 13-air inlet filter. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] The hot air generating device of the present invention is as follows Figures 1 to 3 As shown, it includes a fan 1, a tube body 3, a bracket 4 and a heating wire 5. The fan 1 can be a centrifugal fan. The air outlet of the fan 1 is connected to the tube body 3. The heating wire 5 is spirally wound on the bracket 4. The material of the bracket 4 can be ceramic. The bracket 4 and the heating wire 5 are arranged in the tube body 3.

[0028] like Figures 1 to 3As shown, the hot air generating device of the present invention further includes a first radial positioning component 6, a second radial positioning component 7, a flange 2 and a core column 8. The bracket 4 is formed with an axial through hole 402, and the core column 8 is adapted to pass through the axial through hole 402. One end of the flange 2 is connected to the fan 1, as shown in FIG. Figure 1 As shown, the flange 2 may include a flange pipe portion 21 and a flange plate portion 22, and the flange pipe portion 21 and the flange plate portion 22 may be fixedly connected by corresponding screws; specifically, the flange plate portion 22 is fixedly connected to the edge of the air outlet of the fan 1 by corresponding screws; the other corresponding end of the flange 2 is connected to one end of the tube body 3, specifically, the flange pipe portion 21 is screwed to one end of the tube body 3.

[0029] like Figure 3 and Figure 4 As shown, the first radial positioning assembly 6 includes a first support ring 61, a first fixing nut 62 and a first strut 63 for supporting the bracket 4. The number of the first struts 63 is set to be at least three. The first support ring 61 is sleeved outside the first fixing nut 62. The first strut 63 is screwed to the first support ring 61. The first fixing nut 62 is screwed to one end of the core column 8. One end of the first strut 63 is closely connected to the first fixing nut 62. The first strut 63 can be tightened against the first fixing nut 62 by rotating each first strut 63. The first strut 63 is set to a suitable length so that the other end of the first strut 63 is closely connected to the inner wall of the tube body 3. In order to make the first strut 63 play a stable supporting role for the bracket 4, Figure 4 In the observation direction, the first support rods 63 should be dispersed over a range of more than 180°. If the first support ring 61 is screwed with a plurality of first support rods 63, and all the first support rods 63 are concentrated in a range less than 180°, then the bracket 4 can be biased toward the side not supported by the first support rods 63. Figure 3 As shown, the second radial positioning assembly 7 includes a second support ring 71, a second fixing nut 72 and a second support rod 73 for supporting the bracket 4. The number of the second support rods 73 is set to be at least three. The second support ring 71 is sleeved outside the second fixing nut 72. The second support rod 73 is screwed to the second support ring 71. The second fixing nut 72 is screwed to the other end corresponding to the core column 8. One end of the second support rod 73 is close to the second fixing nut 72, and the other end corresponding to the second support rod 73 is close to the inner wall of the flange 2. The bracket 4 is arranged between the first fixing nut 62 and the second fixing nut 72. The first fixing nut 62 and the second fixing nut 72 can be tightened so that the first fixing nut 62 and the second fixing nut 72 clamp and fix the bracket 4 to prevent the core column 8 and the bracket 4 from being relatively displaced. The first support rod 63 and the second support rod 73 can both use hexagon socket screws.

[0030] like Figure 3As shown, the assembly process of the hot air generating device of the present invention can be: first, the core column 8 can be passed through the bracket 4, and then the first fixing nut 62 and the second fixing nut 72 are installed to make the core column 8 and the bracket 4 form a whole, and then the heating wire 5 is wound around the bracket 4; each first support rod 63 is screwed and installed with the first support ring 61, and then the first support ring 61 is put on the first fixing nut 62, and each first support rod 63 is tightened to make each first support rod 63 press against the first fixing nut 62, and similarly, the second support rod 73 is screwed and installed with the second support ring 71 to make the second support rod 73 press against the second fixing nut 72; the flange 2 is screwed with the pipe body 3, and then the first radial positioning assembly 6, the second radial positioning assembly 7, the bracket 4 and the heating wire 5 are inserted into the pipe body 3 together; the flange 2 is installed and connected with the fan 1; in order to enable the hot air blown out by the hot air generating device of the present invention to be blown to the workpiece that needs hot air drying, such as Figure 1 and Figure 2 As shown, in actual application, the pipe body 3 can be screwed with an elbow 10, and the elbow 10 can be screwed with an air duct 11. The specific size and arrangement of the air duct 11 depend on the actual application. Figure 4 As shown, since the first support rod 63 supports the first fixing nut 62, the second support rod 73 supports the second fixing nut 72, and the core column 8 passes through the bracket 4, the first support rod 63 and the second support rod 73 can support the bracket 4 and the electric heating wire 5 to maintain the middle position of the tube body 3, so that when the airflow generated by the operation of the fan 1 passes through the tube body 3, the airflow can be evenly heated by the electric heating wire 5, so that the airflow heating effect is good, and the electric heating wire 5 is prevented from being biased to one side close to the tube body 3, which causes the tube wall temperature of the tube body 3 to be too high. The excessively high tube wall temperature of the tube body 3 will cause heat to be lost through the tube body 3, affecting the effect of heating the airflow. The above-mentioned support structure of the bracket 4 and the electric heating wire 5 of the present invention is simple and reasonable, which is conducive to improving the performance of the hot air generating device of the present invention.

[0031] Furthermore, if Figure 3 As shown, the flange 2 is threaded with an axial positioning screw 9, which passes through the flange 2. The end of the axial positioning screw 9 is in close contact with the end of the corresponding second support rod 73, that is, the axial positioning screw 9 is aligned with one of the second support rods 73, so when the axial positioning screw 9 is tightened, the axial positioning screw 9 can press the outer end of the second support rod 73 on the other side against the inner wall of the flange 2, so that the second support rod 73 on the other side and the inner wall of the flange 2 generate a static friction force for preventing the bracket 4 from moving along the axial direction of the tube body 3, thereby positioning the bracket 4 and the tube body 3 relatively along the axial direction of the tube body 3, so when the tube body 3 needs to be erected for use, relative displacement of the bracket 4 and the tube body 3 is avoided.

[0032] Furthermore, if Figure 3 and Figure 4As shown, the first radial positioning assembly 6 also includes a first locking nut 64, which is threadedly connected to the corresponding first support rod 63, and the first locking nut 64 is closely connected to the first support ring 61, and the second radial positioning assembly 7 also includes a second locking nut 74, which is threadedly connected to the corresponding second support rod 73, and the second locking nut 74 is closely connected to the second support ring 71. After tightening each first support rod 63 to press the first fixing nut 62, each first locking nut 64 is rotated to press the first locking nut 64 on the outer wall of the first support ring 61, so that the first support rod 63 cannot rotate, so that the first support rod 63 and the first support ring 61 are reliably positioned relative to each other, and the second support rod 73 and the second support ring 71 are reliably positioned relative to each other, so that the assembly structure is reliable and firm.

[0033] Furthermore, if Figure 4 As shown, the first support rods 63 are evenly distributed circumferentially around the axis of the first support ring 61; similarly, the second support rods 73 are evenly distributed circumferentially around the axis of the second support ring 71, which helps to ensure that the bracket 4 is evenly supported radially along the tube body 3, and helps to stabilize the structure of the hot air generating device of the present invention.

[0034] Furthermore, if Figure 4 As shown, the first fixing nut 62 and the second fixing nut 72 are both configured as external hexagonal nuts, and the number of the first support rod 63 and the number of the second support rod 73 are each set to three. Since the external hexagonal nut has a regular hexagonal shape, the three first support rods 63 can be respectively abutted against three planes of the first fixing nut 62, so that the first support rod 63 and the first fixing nut 62 can be reliably fixed relative to each other. The first fixing nut 62 and the second fixing nut 72 are easy to obtain and have low cost.

[0035] Furthermore, if Figure 3 As shown, the first support ring 61 is closely connected to one end of the bracket 4 , and the second support ring 71 is closely connected to the other end of the bracket 4 , thereby further preventing the first radial positioning assembly 6 and the second radial positioning assembly 7 from axial relative displacement with the bracket 4 .

[0036] like Figure 4As shown, the bracket 4 includes a first plate portion 41 and a second plate portion 42. The middle portion of the first plate portion 41 is connected to the middle portion of the second plate portion 42, and the first plate portion 41 is perpendicular to the second plate portion 42. Therefore, the heating wire 5 is wound around the outer ends of the first plate portion 41 and the second plate portion 42. The above structure simply supports the spiral structure of the heating wire 5, and also forms a sufficient channel for airflow between the first plate portion 41 and the second plate portion 42. The axial through hole 402 is thus arranged at the intersection of the first plate portion 41 and the second plate portion 42. The axial through hole 402 is preferably arranged in the middle of the bracket 4. If the axial through hole 402 is not in the middle of the bracket 4, it is necessary to change the length setting of each first support rod 63 accordingly so that the bracket 4 is coaxial with the tube body 3.

[0037] Furthermore, if Figure 3 As shown, the first plate portion 41 and the second plate portion 42 are respectively formed with positioning grooves 401 for accommodating the heating wire 5. Specifically, the first plate portion 41 and the second plate portion 42 are respectively formed with convex teeth, and positioning grooves 401 are formed between adjacent convex teeth. The position of each positioning groove 401 is adapted to the heating wire 5 wound into a spiral line. By providing the positioning grooves 401, the heating wire 5 is facilitated to be stably supported.

[0038] In some embodiments, Figure 1 As shown, the tube body 3 is wrapped with heat insulation cotton 31 (it should be noted that only Figure 1 The heat insulation cotton 31 is schematically drawn). The heat insulation cotton 31 is a prior art, and the heat insulation cotton 31 can be a heat insulation cotton with double-sided aluminum foil and foam rubber. Since the temperature of the tube body 3 is relatively high when the hot air generating device of the present invention is working, the heat loss of the tube body 3 and the electric heating wire 5 can be effectively avoided by providing the heat insulation cotton 31, which is beneficial to improving the hot air generating performance of the hot air generating device of the present invention.

[0039] In some embodiments, Figure 1 and Figure 2 As shown, the air inlet of the fan 1 is provided with an air inlet filter 13. The air inlet filter 13 is a prior art, and a filter cotton for filtering dust particles is provided inside the air inlet filter 13, thereby preventing dust particles from being blown toward the workpiece that needs hot air drying.

[0040] like Figure 1 and Figure 2 As shown, the motor of the fan 1 is fixedly connected to a mounting base 12 via corresponding screws, and the mounting base 12 is used for mounting and connecting with the frame of a processing equipment on which the hot air generating device of the present invention needs to be installed.

[0041] In summary, the hot air generating device of the present invention has the advantages of simple structure, low cost and high performance.

Claims

1. A hot air generating device, comprising a fan (1), a tube (3), a bracket (4) and a heating wire (5), wherein the air outlet of the fan (1) is connected to the tube (3), the heating wire (5) is wound around the bracket (4), and the bracket (4) and the heating wire (5) are arranged in the tube (3); Features: It also comprises a first radial positioning component (6), a second radial positioning component (7), a flange (2) and a core column (8), the bracket (4) being formed with an axial through hole (402), the core column (8) being arranged through the axial through hole (402), one end of the flange (2) being connected to the fan (1), and the other end of the flange (2) being connected to one end of the tube body (3); The first radial positioning assembly (6) comprises a first supporting ring (61), a first fixing nut (62) and a first support rod (63) for supporting the bracket (4); the first supporting ring (61) is sleeved outside the first fixing nut (62); the number of the first support rods (63) is set to be at least three; the first support rod (63) is screwed to the first supporting ring (61); the first fixing nut (62) is screwed to one end of the core column (8); one end of the first support rod (63) is in close contact with the first fixing nut (62); and the other end of the first support rod (63) is in close contact with the inner wall of the tube body (3); The second radial positioning assembly (7) comprises a second support ring (71), a second fixing nut (72) and a second support rod (73) for supporting the bracket (4); the second support ring (71) is sleeved outside the second fixing nut (72); the number of the second support rods (73) is set to be at least three; the second support rod (73) is screwed to the second support ring (71); the second fixing nut (72) is screwed to the other end corresponding to the core column (8); one end of the second support rod (73) is abutted against the second fixing nut (72); and the other end corresponding to the second support rod (73) is abutted against the inner wall of the flange (2); The first support rods (63) are evenly distributed in the circumference with the axis of the first support ring (61) as the center, and the second support rods (73) are evenly distributed in the circumference with the axis of the second support ring (71) as the center; The bracket (4) is arranged between the first fixing nut (62) and the second fixing nut (72).

2. The hot air generating device according to claim 1, characterized in that: The flange (2) is threaded with an axial positioning screw (9), the axial positioning screw (9) is arranged through the flange (2), and the end of the axial positioning screw (9) is abutted against the end of the corresponding second support rod (73).

3. The hot air generating device according to claim 1, characterized in that: The first radial positioning assembly (6) further comprises a first locking nut (64), the first locking nut (64) being threadedly connected to the corresponding first support rod (63), and the first locking nut (64) being abuttingly connected to the first support ring (61). The second radial positioning assembly (7) further comprises a second locking nut (74), the second locking nut (74) being threadedly connected to the corresponding second support rod (73), and the second locking nut (74) being abuttingly connected to the second support ring (71).

4. The hot air generating device according to claim 1, characterized in that: The first fixing nut (62) and the second fixing nut (72) are both external hexagonal nuts, and the number of the first support rod (63) and the number of the second support rod (73) are three respectively.

5. The hot air generating device according to claim 1, characterized in that: The first support ring (61) is abuttingly connected to one end of the bracket (4), and the second support ring (71) is abuttingly connected to the other end of the bracket (4) corresponding to the bracket.

6. The hot air generating device according to claim 1, characterized in that: The bracket (4) comprises a first plate portion (41) and a second plate portion (42), the middle portion of the first plate portion (41) and the middle portion of the second plate portion (42) being connected as one body, and the first plate portion (41) is perpendicular to the second plate portion (42).

7. The hot air generating device according to claim 6, characterized in that: The first plate portion (41) and the second plate portion (42) are respectively formed with corresponding positioning grooves (401) for accommodating the heating wire (5).

8. The hot air generating device according to claim 1, characterized in that: The tube body (3) is wrapped with heat insulating cotton (31).

9. The hot air generating device according to claim 1, characterized in that: An air inlet filter (13) is provided at the air inlet of the fan (1).

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