Hair dryer

Abstract

The utility model provides an air blower, which comprises a main body part, the main body part is provided with a main air duct, a heater air duct and an air outlet which are sequentially arranged from back to front and are communicated with each other, and the main air duct and the heater air duct are annular and are correspondingly communicated; the handle is provided with a handle air duct and an air inlet, the air inlet is formed in the end, away from the main body part, of the handle air duct, the handle air duct is communicated with the outer end part, in the radial direction, of the main body part, and the main air duct and the heater air duct are both communicated with the handle air duct at the outer end part; the heater is arranged in the heater air duct; and the partition plate is arranged at the outer end part, the partition plate is in a fan ring shape extending in the circumferential direction of the main body part, and communication between part of the main air duct and the heater air duct is blocked by the partition plate. The air outlet temperature of the communication position of the main air duct and the heater air duct can be reduced, and the uniformity of the air outlet temperature of the blower is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a hair dryer. Background Art

[0002] As a daily household appliance, hair dryers are mainly used for drying and styling hair and are widely used by people in daily life. With the development of relevant technologies and the improvement of people's requirements for the quality of life, people's requirements for the use of hair dryers are also increasing.

[0003] like Figure 1 , Figure 2 As shown, the existing handle air-inlet hair dryer generally includes a casing 11 and a handle 12 connected to the side wall of the casing 11, the handle 12 is provided with a handle air duct 121 extending along its length direction, the casing 11 is provided with a main air duct 111 extending along its axial direction, the handle air duct 121 is connected to the main air duct 111, and a heater 112 is provided in the casing 11 for heating the air from the handle air duct 121, and the heated air is discharged from the air outlet of the main air duct 111.

[0004] The heater used in the existing handle air inlet hair dryer is usually a ring heater. The distance between the main air duct 111 and the air outlet of the handle air duct 121 is different, and the wind pressure is different. The uneven wind pressure in the main air duct 111 will cause the air outlet temperature of the hair dryer at different air outlet positions to be greatly different, affecting the uniformity of the air outlet temperature distribution of the hair dryer. In addition, the existing hair dryer has the problems of unsmooth airflow and loud noise. Utility Model Content

[0005] In view of the above problems, the utility model provides a hair dryer, which can improve the uniformity of the air outlet temperature of the hair dryer.

[0006] The utility model provides a hair dryer, comprising a main body, a handle, a heater and a partition, wherein the main body has a main air duct, a heater air duct and an air outlet that are interconnected; the handle has a handle air duct and an air inlet, the air inlet is arranged at one end of the handle air duct away from the main body, the handle air duct is connected to the outer end of the main body, and, at the outer end, the main air duct and the heater air duct are both connected to the handle air duct; the heater is arranged in the heater air duct; the partition is arranged at the outer end, the partition is arranged along the circumferential direction of the main body, and part of the communication between the main air duct and the heater air duct is blocked by the partition.

[0007] According to the technical solution, the connection between part of the main air duct and the heater air duct is blocked by setting a partition, so that part of the wind at the handle air duct outlet enters the main air duct and flows. This part of the wind does not directly contact the heater during the flow of the main air duct, and is not heated by the heater. When this part of the wind flows out of the main air duct and flows to the position where the main air duct and the heater air duct are connected, it is heated by the heater in the heater air duct and discharged from the air outlet. In this way, the amount of heat absorbed by this part of the airflow in the path from the handle air duct outlet to the air outlet corresponding to the position where the main air duct and the heater air duct are connected can be reduced, thereby reducing the air outlet temperature at the position where the main air duct and the heater air duct are connected, and improving the uniformity of the air outlet temperature of the hair dryer.

[0008] In an optional technical solution of the utility model, the heater includes a heating wire and multiple thermal insulation sheets, the thermal insulation sheets extend along the radial plane of the main body, the multiple thermal insulation sheets are arranged spaced apart from each other in the circumferential direction of the heater air duct, and the heating wire is coiled around the outer edge of the thermal insulation sheet in the radial direction.

[0009] According to this technical solution, the setting of the thermal insulation sheet can not only provide a support for the arrangement of the heating wire, but also increase the distance between the heating wire and the main body, reduce the heat transfer from the heating wire to the main body, keep the temperature of the main body within a reasonable range, and extend the service life of the main body.

[0010] In an optional technical solution of the utility model, some of the heat insulation sheets have through holes. According to this technical solution, by providing through holes in the heat insulation sheets, the heat generated by the heating wire is transferred to adjacent areas of the heat insulation sheets, which is conducive to improving the uniformity of air temperature distribution between different heat insulation sheets.

[0011] In an optional technical solution of the utility model, a diverter tip is arranged at the outer end of the main air duct, and the tip of the diverter tip is arranged toward the handle air duct.

[0012] According to the technical solution, the provision of the diverter tip can reduce the collision between the wind at the handle air duct outlet and the inner ring of the main air duct, reduce the rebound of the airflow, and can guide the wind at the handle air duct outlet to be evenly diverted to the opposite sides of the diverter tip. By guiding and diverting the wind through the diverter tip, the turbulence of the wind and the noise of the hair dryer can be reduced.

[0013] In an optional technical solution of the utility model, the splitter tip is formed by two inclined surfaces intersecting each other in an inclined manner. When viewed from the front-to-back direction, the extending direction of the inclined surface is tangent to the inner ring of the annular main air duct.

[0014] According to the technical solution, the extension direction of the inclined surface is tangent to the inner ring of the annular main air duct, which can improve the smoothness of the airflow, reduce the surface collision between the airflow and the inner ring of the main air duct, and reduce the noise of the hair dryer.

[0015] In an optional technical solution of the utility model, a flared portion is provided at the connection between the main air duct and the handle air duct, and the opening size of the flared portion gradually increases along the airflow direction at the flared portion.

[0016] According to the technical solution, in the direction of airflow, the opening size of the flared portion gradually increases, and the flared portion and the outer ring of the main air duct tend to be smoothly transitioned and connected, which improves the stability of the airflow, reduces the generation of turbulence, and is conducive to reducing the noise of the hair dryer. Moreover, a shape with a gradually shrinking diameter can be formed between the flared portion and the inner ring or the diverter tip of the main air duct, which can guide the compression of the airflow and improve the stability of the airflow.

[0017] In an optional technical solution of the utility model, an inner wall portion of an inner ring constituting the annular main air duct is provided with a first opening portion on one side of the splitter tip and adjacent to the splitter tip.

[0018] According to this technical solution, the wind from the handle air duct outlet, in an unheated state, flows into the internal space of the main body through the first opening, and can dissipate the heat of the components in the main body, or carry particles or ions generated by the components in the main body and blow them out with the airflow.

[0019] In an optional technical solution of the present invention, a second opening is provided on the rear wall portion constituting the main air duct at a position corresponding to the tip of the splitter tip.

[0020] According to the technical solution, the wind from the handle air duct outlet enters the rear wall portion of the main air duct through the second opening portion in an unheated state, and can dissipate the heat of the rear wall portion of the main air duct and components near the rear wall portion, thereby ensuring the heat dissipation effect of the components near the rear wall portion of the main air duct.

[0021] In an optional technical solution of the present invention, viewed from the front-to-back direction, a guide plate is further provided at one end of the main air duct away from the outer end.

[0022] According to this technical solution, the guide plate can change the flow path of the wind, avoiding direct collision between the high-speed airflow and the outer ring wall of the main air duct, and making the wind flow along the guide plate, reducing the generation of turbulence, which is beneficial to reducing the noise of the hair dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the internal heater of the hair dryer in the prior art.

[0024] Figure 2 for Figure 1 Schematic diagram of the cross-section along the AA section line.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the hair dryer in the embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the main body in an embodiment of the utility model.

[0027] Figure 5 In the implementation mode of the utility model Figure 3 Schematic diagram of the cross-section along the BB line.

[0028] Figure 6 In the implementation mode of the utility model Figure 3 Schematic cross-sectional view along the CC section line.

[0029] Figure 7 It is a cross-sectional schematic diagram of the connection position between the handle air duct and the main air duct in the prior art.

[0030] Reference numerals:

[0031] Existing technology:

[0032] Housing 11; main air duct 111; heater 112; handle 12; handle air duct 121;

[0033] This application:

[0034] Main body 2; main air duct 21; inner ring 211; first opening 2111; outer ring 212; second opening 2121; heater air duct 22; air outlet 23; outer end 24; handle 3; handle air duct 31; air inlet 32; heater 4; heat insulation sheet 41; heating wire 42; partition 5; connecting hole 51; baffle 6. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] <First Embodiment>

[0037] Figure 3 1 is a structural appearance diagram of a hair dryer provided by the first embodiment of the utility model. Figure 3 As shown, this embodiment provides a hair dryer, including a main body 2 and a handle 3. The main body 2 is in a slightly deformed cylindrical shape as a whole, and an air outlet 23 is provided at one end in the axial direction. The main body 2 is connected to the handle 3 at its outer end 24 in the radial direction, starting from the central axis of the main body 2 and perpendicular to the axial direction, i.e., the radial direction.

[0038] The main body 2 and the handle 3 have a hollow shell, and a chamber or airflow channel is formed inside to accommodate electrical components. Specifically, the main body 2 accommodates a heater 4, and the handle 3 accommodates a blower. The blower can drive air to enter the hair dryer from the air inlet 32 ​​set at the lower end of the handle 3, pass through the handle air duct 31 inside the handle 3, enter the main body 2, and after being heated by the heater 4, blow out through the air outlet 23, thereby supplying hot air.

[0039] Figure 4 It is a schematic diagram (stereoscopic diagram) of the structure of the air duct-related portion obtained after a part of the outer shell structure of the main body 2 is removed in an embodiment of the present utility model. Figure 5 yes Figure 3 The cross-sectional view obtained by cutting along the BB section line. Figure 4 and Figure 5 The main body 2 has a main air duct 21 and a heater air duct 22 (such as Figure 4 The solid arrow without a number is the flow direction of the wind in the main air duct 21, and the dotted arrow is the flow direction of the wind in the heater air duct 22) and the air outlet 23. The main air duct 21 and the heater air duct 22 are both annular and connected to each other. Among them, the main air duct 21 is an annular air duct directly connected to the handle air duct 31, and the heater 4 is arranged in the heater air duct 22. After the airflow of the main air duct 21 enters the heater air duct 22, it is divided into multiple branches by the heat insulation sheet 41 and blown forward through the air outlet 23.

[0040] like Figure 3 , Figure 5 As shown, the handle air duct 31 is connected to the outer end 24 of the main body 2 in the radial direction, and, at the outer end 24, the main air duct 21 and the heater air duct 22 are both connected to the handle air duct 31. The partition 5 is arranged at the outer end 24, in a fan-shaped shape extending in the circumferential direction of the main body 2, and the connection between part of the main air duct 21 and the heater air duct 22 is blocked by the partition 5. In other words, at the outer end 24, the handle air duct 31 and the main air duct 21 are interconnected to provide an airflow blown out from the upper part of the main body 2; the handle air duct 31 and the heater air duct 22 are interconnected to provide an airflow blown out from the lower part of the main body 2; the main air duct 21 and the heater air duct 22 are blocked by the partition 5, and the two are not connected or the air volume is limited. The terms "upper" and "lower" when indicating directions refer to Figure 5 The up and down directions are indicated in the figure.

[0041] In this embodiment, the connection between part of the main air duct 21 and the heater air duct 22 is blocked by setting the partition 5, so that the flow path of the wind entering the main body 2 is divided into two layers, upper and lower. In the first layer of the flow path, i.e., the lower layer of the flow path, the wind at the outlet of the handle air duct 31 directly enters the heater air duct 22 and is heated by the heater 4 before being discharged. In the second layer of the flow path, i.e., the upper layer of the flow path, part of the wind at the outlet of the handle air duct 31 enters the main air duct 21 and flows upward. This part of the wind does not directly contact the heater 4 during the flow in the main air duct 21 and is not heated by the heater 4. When this part of the wind flows out of the main air duct 21 and flows to the position where the main air duct 21 and the heater air duct 22 are connected (the position where the main air duct 21 and the heater air duct 22 are not separated by the partition 5), it is heated by the heater 4 in the heater air duct 22 and discharged from the air outlet 23. In this way, the wind pressure of the first layer flow channel and the second layer flow channel can be balanced. Moreover, because the first layer flow channel and the second layer flow channel are isolated, the airflow in the main air duct 21 can be prevented from being heated along the circumferential flow of the heater 4, so that the wind temperature of the first layer flow channel and the second layer flow channel is basically equal or the difference is within a controllable range, thereby improving the uniformity of the air outlet temperature of the hair dryer.

[0042] It should be noted that, in the present embodiment, the outer contour of the main body 2 is roughly cylindrical, and the "circumferential direction", "axial direction" and "radial direction" described in the present embodiment are based on the main body 2 as a reference, and the "circumferential direction", "axial direction" and "radial direction" refer to the circumferential direction, axial direction and radial direction of the main body 2 respectively.

[0043] Continue reading Figure 4 In a preferred embodiment of the present invention, the partition 5 is arranged corresponding to the air outlet of the handle air duct 31 or the air inlet of the main air duct 21, so that the air at the outlet of the handle air duct 31 is stratified when entering the main body 2, which is beneficial to improve the uniformity of the air outlet temperature of the hair dryer. Figure 1 In the prior art shown, when the wind from the handle air duct 121 outlet is discharged from the upper end of the hair dryer, it needs to pass through 1 / 2 circumference of the heater 112 (the wind is heated in this process). The wind discharged from the upper end of the hair dryer provided in this embodiment does not need to go through the above heating process, which can reduce the air outlet temperature of the upper end of the hair dryer and avoid red heat at the upper end of the hair dryer.

[0044] In some embodiments, the partition 5 has a connecting hole 51 near the air inlet of the main body 2, so that the heater air duct 22 and the main air duct 21 are connected through the connecting hole 51 at a position near the air inlet of the main body 2. Part of the wind at the outlet of the handle air duct 31 enters the heater air duct 22 through the connecting hole 51, rather than being completely blocked from entering the main air duct 21, which can further balance the outlet air temperature of the air ducts at different circumferential positions. It should be noted that technicians can adjust the shape and size of the connecting hole 51 according to actual working conditions to adjust the air volume entering the heater air duct 22.

[0045] In a preferred embodiment of the utility model, the heater 4 includes: a plurality of heat-insulating sheets 41 and a heating wire 42, the heat-insulating sheets 41 extend along the radial plane of the main body 2, and the plurality of heat-insulating sheets 41 are arranged spaced apart from each other in the circumferential direction of the heater air duct 22; the heating wire 42 is coiled around the outer edge of the heat-insulating sheet 41 in the radial direction (in order to clearly show the structure of the heater 4, the figure only schematically shows a small section of the heating wire 42 coiled around the outer edge of the heat-insulating sheet 41, and the technicians can control the number of windings of the heating wire 42 around the outer edge of the heat-insulating sheet 41 and the distance between the heating wires 42 of different layers according to actual needs, which is not limited in this embodiment). The provision of the heat-insulating sheet 41 can not only provide a support for the arrangement of the heating wire 42, but also increase the distance between the heating wire 42 and the main body of the heater 4, reduce the heat transfer between the heating wire 42 and the main body of the heater 4, keep the temperature of the main body of the heater 4 within a reasonable range, and extend the service life of the main body 2.

[0046] In a preferred embodiment of the utility model, at least a portion of the heat insulation sheet 41 has a through hole 411 on the inner edge in the radial direction. By providing the through hole 411 in the heat insulation sheet 41, the airflow can be transferred between adjacent areas of the heat insulation sheet 41, which is beneficial to improve the uniformity of the air temperature distribution between different heat insulation sheets 41 and prevent local overheating. Furthermore, the partition 5 has multiple heat insulation sheets 5 in the extended area in the circumferential direction, and part of the heat insulation sheets 5 can also be configured as a baffle 6 without through holes. The baffle 6 is arranged corresponding to the air inlet of the outer end 24 of the main body 2, which can block the wind at the outlet of the handle air duct 31, so that the wind at the outlet of the handle air duct 31 first enters the main air duct 21 for diversion and then enters the heater air duct 22, rather than directly entering the heater air duct 22, to ensure the uniformity of the air outlet temperature of the hair dryer.

[0047] like Figure 6 As shown, the main air duct 21 of the hair dryer is provided with a diverter tip 7 at the outer end 24, and the tip of the diverter tip 7 is arranged toward the handle air duct 31. The arrangement of the diverter tip 7 can reduce the collision between the wind at the outlet of the handle air duct 31 and the inner ring of the main air duct 21, reduce the rebound of the airflow, and can guide the wind at the outlet of the handle air duct 31 to be evenly diverted to the opposite sides of the diverter tip 7. By guiding and diverting the wind through the diverter tip 7, the turbulence of the wind and the noise of the hair dryer can be reduced.

[0048] Furthermore, the splitter tip 7 is formed by two inclined surfaces intersecting each other obliquely. Figure 6The extending direction of the inclined surface is tangent to the inner ring 211 of the annular main air duct 21, thereby improving the stability of the air flow and reducing the noise of the hair dryer. It should be noted that the extending direction of the inclined surface here can be basically tangent to the inner ring 211 of the annular main air duct 21, and does not require strict tangency in geometric relationship, and can have a deviation within 10°.

[0049] Furthermore, a flared portion 8 is provided at the connection between the main air duct 21 and the handle air duct 31, and the opening size of the flared portion 8 is along the airflow direction at the flared portion 8 ( Figure 6 The flared portion 8 is gradually enlarged in the direction of the arrow in the handle air duct 31 shown in FIG. 1 . Specifically, in the airflow direction, the opening size of the flared portion 8 is gradually enlarged, and the flared portion 8 and the outer ring 212 of the main air duct 21 tend to be smoothly transitioned and connected, which improves the stability of the airflow flow, reduces the generation of turbulence, and is conducive to reducing the noise of the hair dryer. Moreover, a shape with a gradually shrinking caliber can be formed between the flared portion 8 and the inner ring 211 of the main air duct 21 or the diverter tip 7, which can guide the compression of the airflow and improve the stability of the airflow.

[0050] In contrast, Figure 7 In the prior art shown, the handle air duct 121 is a vertical air duct, and the main air duct 111 is a ring-shaped air duct. When the wind at the outlet of the handle air duct 121 enters the main air duct 111, it will collide and rebound with the inner ring of the main air duct 111, and the wind will cause turbulence between the inner ring and the outer ring of the main air duct 111, causing noise.

[0051] In this embodiment, the flared portion 8 is in a bell-shaped shape, and the wind flows along the arc-shaped inner wall of the bell-shaped mouth to the outer ring 212 of the main air duct 21 and flows along the inner ring 211 of the main air duct 21 after being diverted from the diverter tip 7, which is beneficial to reducing noise.

[0052] In the preferred embodiment of the present invention, Figure 4 As shown, the inner wall of the inner ring 211 constituting the annular main air duct 21 is provided with a first opening 2111 on one side of the diverter tip 7 and adjacent to the diverter tip 7. Thus, the wind from the outlet of the handle air duct 31 flows into the internal space of the main body 2 through the first opening 2111 in an unheated state, and can dissipate heat for the components in the main body 2, ensure the use stability of the components in the main body 2, or carry particles or ions generated by the components in the main body 2 so that the particles or ions are blown out with the airflow. In some embodiments, technicians can adjust the position of the first opening 2111 as needed, such as setting it apart from the diverter tip 7, and this embodiment does not limit this.

[0053] In some embodiments, the rear wall portion constituting the main air duct 21 is provided with a second opening portion 2121 at a position corresponding to the tip of the diverter tip 7. Thus, the wind from the outlet of the handle air duct 31 enters the rear wall portion of the main air duct 21 through the second opening portion without being heated, and can dissipate heat from the rear wall portion of the main air duct 21 and components near the rear wall portion, thereby ensuring the heat dissipation effect of the components near the rear wall portion of the main air duct 21.

[0054] In a preferred embodiment of the utility model, from the front-to-back direction, the main air duct 21 is further provided with a guide plate 9 at one end away from the outer end portion 24. The guide plate 9 can change the flow path of the wind, avoid the direct collision of the high-speed airflow with the wall surface of the outer ring 212 of the main air duct 21, and make the wind flow along the guide plate 9, reduce the generation of turbulence, and at the same time, the wind blows on the guide plate 9, which can reduce the wind speed, thereby helping to reduce the noise of the hair dryer. In this embodiment, the guide plate 9 includes 6 pieces, which are symmetrically arranged on both sides of the axial direction of the main body 2 to ensure the uniformity of the wind flowing on both sides of the axial direction.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hair dryer, characterized in that: include: A main body, wherein the main body has a main air duct, a heater air duct and an air outlet that are interconnected; A handle having a handle air duct and an air inlet, wherein the air inlet is arranged at one end of the handle air duct away from the main body, the handle air duct is connected to an outer end of the main body, and at the outer end, the main air duct and the heater air duct are both connected to the handle air duct; a heater, disposed in the heater air duct; and A partition is arranged at the outer end portion, and the partition is arranged along the circumferential direction of the main body portion. The communication between part of the main air duct and the heater air duct is blocked by the partition.

2. The hair dryer according to claim 1, characterized in that The heater comprises: A plurality of heat-insulating sheets, the heat-insulating sheets extending along the radial plane of the main body, and the plurality of heat-insulating sheets being arranged spaced apart from each other in the circumferential direction of the heater air duct; The heating wire is coiled around the outer edge of the heat insulation sheet in the radial direction.

3. The hair dryer according to claim 2, characterized in that: Some of the heat insulation sheets have through holes.

4. The hair dryer according to claim 1, characterized in that: The main air duct is provided with a diverter tip at the outer end, and the tip of the diverter tip is arranged toward the handle air duct.

5. The hair dryer according to claim 4, characterized in that: The splitter tip is formed by two inclined surfaces intersecting each other obliquely. When viewed from the front-to-back direction, the extending direction of the inclined surface is tangent to the inner ring of the annular main air duct.

6. The hair dryer according to claim 1 or 4, characterized in that: A flared portion is provided at the connection between the main air duct and the handle air duct, and the opening size of the flared portion gradually increases along the airflow direction at the flared portion.

7. The hair dryer according to claim 4, characterized in that: The inner wall portion of the inner ring constituting the annular main air duct is provided with a first opening portion on one side of the flow splitter tip and adjacent to the flow splitter tip.

8. The hair dryer according to claim 4, characterized in that: The rear wall portion constituting the main air duct is provided with a second opening at a position corresponding to the tip of the splitter tip.

9. The hair dryer according to claim 1, characterized in that: Viewed from the front-to-back direction, the main air duct is further provided with a guide plate at one end away from the outer end portion.

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