Heat dissipation structure of an electric hair dryer

Abstract

The utility model discloses a heat dissipation structure of electric hair dryer, including air cylinder, handle and the motor installation cylinder of setting in the air cylinder, be provided with circuit control module installation cavity on the handle, be provided with the through -line hole of intercommunication with circuit control module installation cavity between motor installation cylinder and handle, be provided with the air inlet hole of intercommunication with circuit control module installation cavity on the handle, the lateral wall of motor installation cylinder is provided with the air vent of alignment with through -line hole, the motor installation cylinder between the air cylinder of the rear side of air vent is provided with sealing washer. The heat dissipation structure of this electric hair dryer can effectively enhance the heat dissipation effect of circuit control module on the handle.

Description

Technical Field

[0001] This utility model belongs to the field of hair dryer technology, specifically a heat dissipation structure for a hair dryer. Background Technology

[0002] With the miniaturization trend in personal care appliances, portable hair dryers have gradually become mainstream products in the market. However, the significant reduction in overall size presents a serious challenge to their internal space layout. In existing technologies, the circuit control module is mostly installed inside the handle. The reduced overall size leads to more limited installation space for the circuit control module inside the handle, as well as a decrease in heat dissipation area. This results in the circuit control module operating at a sustained high temperature after the hair dryer has been running for a period of time, which can easily damage it.

[0003] Existing technologies also include designs that open heat dissipation holes on the handle to increase the heat dissipation effect of the circuit control module. Heat is dissipated through natural heat dissipation or by drawing air through the heat dissipation holes and passing it through the circuit control module during the operation of the hair dryer. However, due to the certain gap between the motor mounting tube and the blower tube, the amount of air drawn in through the heat dissipation holes is small, resulting in poor heat dissipation. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a heat dissipation structure for a hair dryer, which effectively enhances the heat dissipation of the circuit control module on the handle.

[0005] To solve the above-mentioned technical problems, this utility model provides a heat dissipation structure for a hair dryer, including a blower tube, a handle, and a motor mounting tube disposed within the blower tube. The handle has a circuit control module mounting cavity, and a through hole communicating with the circuit control module mounting cavity is provided between the motor mounting tube and the handle. The handle also has an air inlet communicating with the circuit control module mounting cavity. A vent aligned with the through hole is provided on the side wall of the motor mounting tube, and a sealing ring is provided between the motor mounting tube and the blower tube at the rear of the vent. In operation, air enters through the air inlet, passes through the circuit control module mounting cavity, and enters the blower tube, dissipating heat within the cavity. Simultaneously, the sealing ring seals the gap between the motor mounting tube and the blower tube, allowing airflow through this gap to flow forward from one side of the circuit control module mounting cavity via the vent, further enhancing the airflow through the cavity and thus improving the heat dissipation effect.

[0006] In the above technical solution, preferably, the outer wall of the motor mounting cylinder is provided with an annular groove, and the sealing ring is disposed within the annular groove. This structure makes the positioning of the sealing ring more reliable.

[0007] In the above technical solution, preferably, the air inlet is located at the bottom of the handle.

[0008] In the above technical solution, preferably, a power cord sleeve assembly is fixed to the bottom of the handle, and the power cord sleeve assembly is provided with a through hole communicating with the air inlet.

[0009] In the above technical solution, preferably, the motor mounting cylinder includes an upper semi-circular shell and a lower semi-circular shell. The upper and lower semi-circular shells are joined together to form a motor positioning cavity with an inner diameter larger than that on both sides. A motor is fixed inside the motor positioning cavity. A first positioning hole is provided at the bottom of the motor mounting cylinder. A positioning part is provided on the side of the air blower connected to the handle. A second positioning hole is provided on the positioning part. A screw is inserted and fixed between the first and second positioning holes. When assembling a hair dryer using this structure, the motor is placed into the motor positioning cavity of the upper or lower semi-circular shell. Then, the upper and lower semi-circular shells are joined together to form the motor mounting cylinder. The motor mounting cylinder is then inserted into the air blower. The first and second positioning holes are aligned, and a screw is inserted from the bottom of the second positioning hole and screwed into the first positioning hole to complete the assembly of the motor mounting cylinder. This design ensures impact resistance and reliability while also featuring a compact layout and convenient assembly.

[0010] In the above technical solution, preferably, the handle includes a central stem portion integrally formed with the handle, an opening is provided on the rear side of the central stem portion, a rear stem portion is covered by the opening, and the positioning part is located at the top of the opening. This structure makes the opening position convenient for screw installation tools to operate, making installation more convenient.

[0011] In the above technical solution, preferably, the rear handle and the middle handle are fixed by screws.

[0012] In the above technical solution, preferably, the upper semicircular shell and the lower semicircular shell are fastened together by a snap fastener.

[0013] In the above technical solution, preferably, an air guide tube is provided inside the air duct, one end of which abuts against a convex ring on the inner wall of the air duct, and the other end of which abuts against the motor mounting cylinder. This structure fixes both the motor mounting cylinder and the air guide tube simultaneously, facilitating the assembly of the air guide tube.

[0014] In the above technical solution, preferably, the inner wall of the air duct is provided with an elastic limiting protrusion, and the outer wall of the motor mounting cylinder is provided with a limiting ring, the side of the limiting ring away from the air duct abutting against the elastic limiting protrusion. This structure further improves the installation stability between the air duct and the motor mounting cylinder.

[0015] Compared with the prior art, this utility model has the following beneficial effects: When the hair dryer is running, air enters from the air inlet, passes through the circuit control module mounting cavity, and enters the air duct, realizing heat dissipation in the circuit control module mounting cavity. The airflow between the motor mounting cylinder behind the sealing ring and the air duct can only flow from one side of the circuit control module mounting cavity through the vent to the front, further enhancing the airflow through the circuit control module mounting cavity, thereby enhancing the heat dissipation effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is an exploded structural diagram of an embodiment of the present utility model.

[0018] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the power cord sleeve assembly without the power cord sleeve in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the outer casing of the power cord sleeve assembly in an embodiment of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the air duct in an embodiment of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the air duct from another direction in an embodiment of this utility model.

[0023] Figure 8 This is a schematic diagram of the structure of the motor mounting cylinder in an embodiment of this utility model. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1 to 8A heat dissipation structure for a hair dryer includes a blower tube 1, a handle 2, and a motor mounting tube 3 disposed within the blower tube 1. The handle 2 has a circuit control module mounting cavity 15. A through-hole 12 communicating with the circuit control module mounting cavity 15 is provided between the motor mounting tube 3 and the handle 2. An air inlet 20 communicating with the circuit control module mounting cavity 15 is provided on the handle 2. A vent 21 aligned with the through-hole 12 is provided on the side wall of the motor mounting tube 3. A sealing ring 19 is provided between the motor mounting tube 3 and the blower tube 1 behind the vent 21. In operation, air enters through the air inlet 20, passes through the circuit control module mounting cavity 15, and enters the blower tube, dissipating heat within the cavity. Airflow between the motor mounting tube 3 and the blower tube 1 behind the sealing ring 19 can only flow from one side of the circuit control module mounting cavity 15, through the vent 21, and forward, further enhancing the airflow through the cavity and thus improving the heat dissipation effect.

[0025] In this embodiment, an annular groove 18 is provided on the outer wall of the motor mounting cylinder 3, and a sealing ring 19 is provided inside the annular groove 18. This structure makes the positioning of the sealing ring 19 more reliable.

[0026] In this embodiment, the air inlet 20 is located at the bottom of the handle 2.

[0027] In this embodiment, a power cord sleeve assembly 22 is fixed to the bottom of the handle 2. The power cord sleeve assembly 22 is provided with a through hole 23 communicating with the air inlet 20. The power cord sleeve assembly 22 includes an inner sleeve and an outer sleeve. The inner sleeve is fitted over the power cord and secured to the bottom of the handle 2. The inner wall of the outer sleeve is provided with a protrusion, and the outer wall of the inner sleeve is provided with a limiting groove. The outer sleeve is fixed to the inner sleeve by inserting the protrusion into the limiting groove. The through hole 23 is provided on the outer sleeve.

[0028] In existing technologies, there are generally two types of installation structures for the motor mounting cylinder and the air duct. One type involves aligning and assembling the motor mounting cylinder with a positioning groove or limiting ring on the outer wall and a pre-set elastic buckle on the inner wall of the air duct. While this structure offers the advantage of convenient assembly, stress concentration can easily occur at the interface between the buckle and the groove when the product is subjected to accidental drop impact, leading to buckle breakage or plastic deformation and posing a risk of the motor assembly detaching from the air duct. The other type is a screw-fastened positioning ring structure: to improve fixing reliability, some models use a positioning ring fitted around the outer circumference of the motor, which is then locked to the inner wall of the air duct by multiple circumferentially distributed screws. Although this solution enhances structural rigidity, it introduces significant drawbacks. The addition of the positioning ring and screws forces an increase in the radial dimension of the air duct, and the narrow internal operating space of the air duct restricts the accessibility of assembly tools, significantly impacting production efficiency.

[0029] In this embodiment, the motor mounting cylinder 3 includes an upper semi-circular shell 4 and a lower semi-circular shell 5. The upper semi-circular shell 4 and the lower semi-circular shell 5 are joined together to form a motor positioning cavity 6 with an inner diameter larger than that on both sides. A motor 7 is fixed inside the motor positioning cavity 6. A first positioning hole 8 is provided at the bottom of the motor mounting cylinder 3. A positioning part 9 is provided on the side of the blower 1 that is connected to the handle 2. A second positioning hole 10 is provided on the positioning part 9. A screw is inserted and fixed between the first positioning hole 8 and the second positioning hole 10. When assembling the hair dryer using this structure, the motor is placed into the motor positioning cavity 6 of the upper semi-circular shell 4 or the lower semi-circular shell 5. Then, the upper semi-circular shell 4 and the lower semi-circular shell 5 are joined together to form the motor mounting cylinder 3. The motor mounting cylinder 3 is then installed into the blower 1. The first positioning hole 8 and the second positioning hole 10 are aligned, and a screw is inserted from the bottom of the second positioning hole 10 and screwed into the first positioning hole 8 to complete the assembly of the motor mounting cylinder 3. This design ensures impact resistance and reliability while also featuring a compact layout and convenient assembly.

[0030] In this embodiment, the upper semicircular shell 4 and the lower semicircular shell 5 are arranged vertically after assembly, and the two first positioning holes 8 are located on the lower semicircular shell 5. In other embodiments, the upper semicircular shell 4 and the lower semicircular shell 5 can also be arranged horizontally, and the first positioning holes 8 can be set at the bottom of the upper semicircular shell 4 and the lower semicircular shell 5.

[0031] In this embodiment, the handle 2 includes a central handle portion 11 integrally formed with the handle 2. An opening 13 is provided on the rear side of the central handle portion 11, and a rear handle portion 14 is provided on the opening 13. The positioning portion 9 is located on the top of the opening 13. This structure makes the position of the opening 13 convenient for screw installation tools to operate, making installation more convenient.

[0032] In this embodiment, the rear handle 14 and the middle handle 11 are fixed together by screws. Of course, in other embodiments, the rear handle 14 and the middle handle 11 can also be fixed together by clips.

[0033] In this embodiment, the upper semicircular shell 4 and the lower semicircular shell 5 are fastened together by a snap fastener.

[0034] In this embodiment, an air guide duct 21 is provided inside the air duct 1. One end of the air guide duct 21 abuts against the protruding ring 22 on the inner wall of the air duct 1, and the other end of the air guide duct 21 abuts against the motor mounting cylinder 3. This structure fixes the air guide duct 21 while fixing the motor mounting cylinder 3, which facilitates the assembly of the air guide duct 21.

[0035] In this embodiment, the inner wall of the air duct 1 is provided with an elastic limiting protrusion 17, and the outer wall of the motor mounting cylinder 3 is provided with a limiting ring 16. The side of the limiting ring 16 away from the air guide duct 21 abuts against the elastic limiting protrusion 17. This structure further improves the installation stability between the air duct 1 and the motor mounting cylinder 3.

[0036] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A heat dissipation structure for a hair dryer, comprising a blower tube (1), a handle (2), and a motor mounting tube (3) disposed within the blower tube (1), wherein the handle (2) is provided with a circuit control module mounting cavity (15), characterized in that: A through hole (12) communicating with the circuit control module mounting cavity (15) is provided between the motor mounting cylinder (3) and the handle (2). An air inlet (20) communicating with the circuit control module mounting cavity (15) is provided on the handle (2). A vent (21) aligned with the through hole (12) is provided on the side wall of the motor mounting cylinder (3). A sealing ring (19) is provided between the motor mounting cylinder (3) and the air duct (1) on the rear side of the vent (21).

2. The heat dissipation structure of a hair dryer as described in claim 1, characterized in that: The outer wall of the motor mounting cylinder (3) is provided with an annular groove (18), and the sealing ring (19) is provided in the annular groove (18).

3. The heat dissipation structure of a hair dryer as described in claim 1, characterized in that: The air inlet (20) is located at the bottom of the handle (2).

4. The heat dissipation structure of a hair dryer as described in claim 3, characterized in that: The bottom of the handle (2) is fixed with a power cord sleeve assembly (22), and the power cord sleeve assembly (22) is provided with a through hole (23) that communicates with the air inlet (20).

5. The heat dissipation structure of a hair dryer as described in claim 1, characterized in that: The motor mounting cylinder (3) includes an upper semi-circular shell (4) and a lower semi-circular shell (5). The upper semi-circular shell (4) and the lower semi-circular shell (5) are joined together to form a motor positioning cavity (6) with an inner diameter larger than the two sides. A motor (7) is fixed in the motor positioning cavity (6). A first positioning hole (8) is provided at the bottom of the motor mounting cylinder (3). A positioning part (9) is provided on the side of the air duct (1) connected to the handle (2). A second positioning hole (10) is provided on the positioning part (9). A screw is inserted and fixed between the first positioning hole (8) and the second positioning hole (10).

6. The heat dissipation structure of a hair dryer as described in claim 5, characterized in that: The handle (2) includes a central stem portion (11) integrally formed with the handle (2), an opening (13) is provided on the rear side of the central stem portion (11), a rear stem portion (14) is covered on the opening (13), and the positioning portion (9) is located on the top of the opening (13).

7. The heat dissipation structure of a hair dryer as described in claim 6, characterized in that: The rear handle (14) and the middle handle (11) are fixed together by screws.

8. The heat dissipation structure of a hair dryer as described in claim 5, characterized in that: The upper semicircular shell (4) and the lower semicircular shell (5) are fastened together by snap fasteners.

9. The heat dissipation structure of a hair dryer as described in claim 1, characterized in that: A guide tube (21) is provided inside the air duct (1). One end of the guide tube (21) abuts against the protruding ring (22) on the inner wall of the air duct (1), and the other end of the guide tube (21) abuts against the motor mounting cylinder (3).

10. The heat dissipation structure of a hair dryer as described in claim 9, characterized in that: The inner wall of the air duct (1) is provided with an elastic limiting protrusion (17), and the outer wall of the motor mounting cylinder (3) is provided with a limiting ring (16). The side of the limiting ring (16) away from the air duct (21) abuts against the elastic limiting protrusion (17).

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