High heat dissipation hair dryer

Abstract

The present invention discloses a high heat dissipation hair dryer, which belongs to the field of household appliance technology and is designed to solve the problems of poor heat dissipation of existing motor circuit boards. The high heat dissipation hair dryer of the present invention comprises a housing and a heating component, and an air inlet blocking portion is arranged in the housing. The air inlet blocking portion is at least partially located in the air duct of the hair dryer, and at least part of the air can be redirected when passing through the air inlet blocking portion and then flow through the heating component. The high heat dissipation hair dryer of the present invention utilizes part of the air flow to divert and take away the heat from the heating component, thereby solving the problem of poor heat dissipation effect of the circuit board in the existing device and improving the working stability of the hair dryer.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a high heat dissipation hair dryer. Background Art

[0002] A hair dryer is a household appliance that uses hot air to dry wet objects. The structure used to generate the air is a fan, the structure used to heat the air is a heating wire, and the structure used to drive the fan to rotate is a motor.

[0003] A brushless motor is a motor with a relatively stable working state. However, because the circuit board of the brushless motor (especially the MOS tube and thyristor thereon) generates a lot of heat, and it is inconvenient to directly install the circuit board in the air duct in order to reduce noise, the brushless motor installed in the hair dryer has poor heat dissipation effect and unstable working state, which restricts the application of brushless motors in hair dryers. Some hair dryers make the circuit board into a ring shape and set it on the outer peripheral surface of the air duct in order to use the incoming air to cool down, but the contact area between the incoming air and the circuit board in this structure is limited, especially the position on the leeward side of the circuit board is completely unable to contact the incoming air, and the heat dissipation capacity is insufficient. Summary of the invention

[0004] The purpose of the present invention is to provide a hair dryer which can improve the heat dissipation efficiency of a circuit board.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A high heat dissipation hair dryer comprises a shell and a heating component. An air inlet blocking portion is arranged in the shell. The air inlet blocking portion is at least partially located in the air duct of the hair dryer. At least part of the incoming air can be changed in direction when passing through the air inlet blocking portion and then flow through the heating component.

[0007] In particular, the air duct includes a front section of the air duct close to the air inlet and a rear section of the air duct close to the air outlet, the front section of the air duct is the annular space between the heating component and the motor, the rear section of the air duct is the annular space outside the inner cylinder close to the air outlet, and the air inlet blocking portion is located at the junction of the front section of the air duct and the rear section of the air duct.

[0008] In particular, the air inlet blocking portion is an end surface of the inner cylinder close to the air inlet.

[0009] In particular, an air inlet is provided on the air inlet blocking portion for allowing part of the airflow to enter the inner cylinder, and a functional element radiator and a functional air outlet are provided in the inner cylinder.

[0010] In particular, the ratio between the outer diameter L of the motor and the inner diameter H of the inner cylinder is between 0.65 and 1.

[0011] In particular, the air outlet includes an air inlet facing the air inlet direction and an air outlet facing the heating component, and the air inlet and the air outlet are separated.

[0012] In particular, the air outlet faces the root of the heating component.

[0013] In particular, the wind inlet blocking portion is a wind shielding surface arranged in the air duct, the wind shielding surface is a vertical surface or an inclined surface, and the wind shielding surface is located on a side of the heating component away from the air inlet.

[0014] In particular, the wind shielding surface and the heating component are respectively located on two opposite sides of the air duct.

[0015] In particular, the heat generating component comprises a circuit board.

[0016] At least part of the incoming air in the high heat dissipation hair dryer of the present invention can be redirected when passing through the air inlet blocking portion and then flow through the heating component, thereby taking away the heat from the heating component, solving the problem of poor heat dissipation effect of the circuit board in the existing device and improving the working stability of the hair dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of a hair dryer provided in a specific embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0019] In the figure:

[0020] 1. Shell; 2. Heat generating component; 3. Motor; 4. Inner tube; 5. Heating wire; 6. Air outlet; 11. Air duct; 41. Functional element radiator; 42. Functional air outlet; 111. Front section of air duct; 112. Rear section of air duct. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0022] This embodiment discloses a high heat dissipation hair dryer. Figure 1 and Figure 2 As shown, the hair dryer includes a housing 1 and a heating component 2 disposed in the housing 1. The heating component 2 may be, but is not limited to, a circuit board of a motor, but is not a heating wire used to heat the airflow in a conventional hair dryer. An air inlet blocking portion is disposed in the housing 1, and the air inlet blocking portion is at least partially located in the air duct 11 of the hair dryer. After the airflow enters the air duct 11, it is at least partially blocked by the air inlet blocking portion, thereby changing the flow direction, blowing toward the heating component 2 and taking away heat from its surface. The problem of excessive heat generation and difficulty in heat dissipation of the brushless motor circuit board is solved.

[0023] The specific location of the air inlet blocking part is not limited. Preferably, the air duct 11 includes a front section 111 of the air duct near the air inlet and a rear section 112 of the air duct near the air outlet. The front section 111 of the air duct is the annular space between the heating component 2 and the motor 3, and the rear section 112 of the air duct is the annular space outside the inner tube 4 near the air outlet (multiple heating wires 5 are installed on the outer wall of the inner tube 4, and the heating wires 5 extend along the air inlet direction, and the airflow passes through the heating wires 5). The air inlet blocking part is located at the junction of the front section 111 of the air duct and the rear section 112 of the air duct. The distance between this position and the heating component 2 is relatively close, and the airflow with a changed blowing direction is easy to blow to the heating component 2, which can take away more heat.

[0024] The air inlet blocking portion is preferably the end surface of the inner cylinder 4 close to the air inlet. Because the diameter of the inner cylinder 4 is larger than the diameter of the motor 3, part of the air inlet will hit the end surface of the inner cylinder 4. Figure 1 and Figure 2 As shown by the solid line with an arrow in the middle, the route is then changed, that is, this part of the airflow is turned and blows directly to the leeward side and root of the heating component 2. The airflow carrying the heat from the heating component 2 is then hit and turned by the heating component 2, and is blown out from the air outlet of the hair dryer together with the normal airflow (shown by the dotted line with an arrow in the figure).

[0025] In the above process, this part of the diverted airflow will turn again after hitting the leeward side or root of the heating component 2, flowing towards the direction of the air outlet, and then generate a certain negative pressure at the root of the heating component 2, thereby driving more air to flow through here to take away the heat from the heating component 2 and reduce the temperature of the heating component 2.

[0026] On the end surface of the inner cylinder 4 (i.e., the air inlet blocking portion), there is an air inlet 6 for part of the air flow to enter the inner cylinder 4. The inner cylinder 4 is provided with a functional element heat sink 41, a functional air outlet 42 and a functional element (not shown). The functional element may be, but is not limited to, a water ion generator and a negative ion generator. A part of the air inlet of the hair dryer will enter the inner cylinder 4 from the air inlet 6. Figure 1 and Figure 2 As shown by the dotted line with an arrow in the middle, this part of the airflow continues to move forward for a distance in the inner cylinder 4, and the airflow blown out from the functional air outlet 42 after passing through the functional element carries water ions and / or negative ions, thereby increasing the function of the hair dryer.

[0027] The width of the air outlet 6 and the width of the end surface of the inner cylinder 4 are not limited, as long as the air can enter smoothly and the incoming air can be impacted and changed in direction. Preferably, the ratio between the outer diameter L of the motor 3 and the inner diameter H of the inner cylinder 4 is between 0.65 and 1, and a suitable proportion of the entire original airflow will enter the inner cylinder 4, which can generate a sufficient amount of functional wind carrying water ions and / or negative ions, and a part of the airflow will be impacted and turned to the direction of the heating component 2, while not affecting the normal use of the hair dryer.

[0028] Preferably, the air vent 6 includes an air inlet facing the air inlet direction and an air outlet facing the heating component 2, and the air inlet and the air outlet are separated. A part of the original airflow enters the inner tube 4 from the air inlet, hits the functional element radiator 41, and then blows out from the air outlet. The air inlet and the air outlet will not collide at the air vent 6, so as to avoid the airflow being dispersed by the functional element radiator 41 and being blocked in the inner tube 4 for a long time, thereby affecting the subsequent air inlet.

[0029] The air outlet is preferably directed toward the root of the heating component 2. The root of the heating component 2 is located far away from the center of the air duct 11 and is the most difficult structure to cool down in the existing device. The airflow blown out from the air outlet and the airflow turned after being blocked by the air inlet blocking part can blow directly toward the root of the heating component 2, taking away the heat there to the greatest extent, and the cooling effect is obvious.

[0030] Of course, the structure of the air inlet blocking portion is not limited to the above form, and can also be a windshield surface set in the air duct 11. The windshield surface is a vertical surface or an inclined surface, and is located on the side of the heating component 2 away from the air inlet. Part of the airflow hits the windshield surface and then turns, flows through the surface of the heating component 2, and then blows out from the air outlet. In order to allow more airflow to blow directly to the leeward side and the root of the heating component 2, preferably, the windshield surface and the heating component 2 are respectively located on opposite sides of the air duct 11.

[0031] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A high heat dissipation hair dryer, comprising a housing (1), a motor (3) arranged inside the housing (1), a heating wire (5) and a heating component (2), characterized in that: An air inlet blocking portion is also provided in the housing (1), and the air inlet blocking portion is at least partially located in the air duct (11) of the hair dryer. At least part of the air can be changed in direction when passing through the air inlet blocking portion, and then flow through the heating component (2) arranged around the motor (3) and then flow through the heating wire (5).

2. The high heat dissipation hair dryer according to claim 1, characterized in that: The air duct (11) comprises a front section (111) of the air duct close to the air inlet and a rear section (112) of the air duct close to the air outlet, the front section (111) of the air duct being an annular space between the heating component (2) and the motor (3), the rear section (112) of the air duct being an annular space outside the inner cylinder (4) close to the air outlet, and the air inlet blocking portion being located at the junction of the front section (111) of the air duct and the rear section (112) of the air duct.

3. The high heat dissipation hair dryer according to claim 2, characterized in that: The air inlet blocking portion is an end surface of the inner cylinder (4) close to the air inlet.

4. The high heat dissipation hair dryer according to claim 2, characterized in that: An air inlet (6) is provided on the air inlet blocking portion for allowing part of the air flow to enter the inner cylinder (4), and a functional element heat sink (41) and a functional air outlet (42) are provided in the inner cylinder (4).

5. The high heat dissipation hair dryer according to claim 4, characterized in that: The ratio between the outer diameter L of the motor (3) and the inner diameter H of the inner cylinder (4) is between 0.65 and 1.

6. The high heat dissipation hair dryer according to claim 4, characterized in that: The air outlet (6) comprises an air inlet facing the air inlet direction and an air outlet facing the heating component (2), and the air inlet and the air outlet are separated.

7. The high heat dissipation hair dryer according to claim 6, characterized in that: The air outlet faces the root of the heating component (2).

8. The high heat dissipation hair dryer according to claim 1, characterized in that: The wind inlet blocking portion is a wind shielding surface arranged in the wind duct (11); the wind shielding surface is a vertical surface or an inclined surface; and the wind shielding surface is located on a side of the heating component (2) away from the air inlet.

9. The high heat dissipation hair dryer according to claim 8, characterized in that: The wind shielding surface and the heating component (2) are respectively located on two opposite sides of the air duct (11).

10. The high heat dissipation hair dryer according to any one of claims 1 to 8, characterized in that: The heating component (2) comprises a circuit board.

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