Handheld air duct

Abstract

The handheld air duct comprises an air duct body and a fan assembly, the air duct body is provided with a holding part, an air inlet duct located in the holding part, an air guide part located at one end of the air inlet duct and an air duct wall, and the air guide part extends in the first direction perpendicular to the length direction of the holding part. The air duct wall surrounds the periphery of the air guide part at intervals so that an air outlet duct can be formed between the air duct wall and the air guide part, and the air inlet duct faces the position between one side of the air guide part and the air duct wall so that the air inlet duct can communicate with the air outlet duct; the fan assembly is arranged in the air inlet duct and used for driving airflow to sequentially flow through the air inlet duct and the air outlet duct. According to the technical scheme, airflow loss can be reduced, and the air outlet effect is improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, the structures and shapes of hair dryers are becoming more and more diverse. At present, there are more and more hair dryers on the market that use handle air inlet. In this type of hair dryer, since there is a 90° angle between the handle air duct and the upper air duct, when the air flow flows from the handle air duct to the upper air duct, a certain amount of turbulence will be generated, resulting in increased air flow loss and affecting the air outlet effect. Utility Model Content

[0003] The main purpose of the utility model is to provide a handheld hair dryer, aiming to reduce air flow loss.

[0004] To achieve the above-mentioned purpose, the handheld hair dryer proposed by the present invention comprises:

[0005] The air duct body comprises a grip portion, an air inlet duct located within the grip portion, an air guide portion located at one end of the air inlet duct, and an air duct wall, wherein the air guide portion extends in a first direction perpendicular to the length direction of the grip portion, the air duct wall surrounds the outer periphery of the air guide portion at intervals to form an air outlet duct between the air guide portion and the air duct wall, and the air inlet duct faces a position between one side of the air guide portion and the air duct wall to communicate with the air outlet duct; and

[0006] A fan assembly is provided in the air inlet duct, and is used to drive the air flow to flow through the air inlet duct and the air outlet duct in sequence.

[0007] Optionally, the air duct body has an air outlet, which is connected to one end of the air outlet duct away from the air inlet duct, and the air duct wall has a guide wall, which spirally extends from the air inlet duct toward the air outlet around the air guide part.

[0008] Optionally, the air duct main body includes an air duct shell and an air guide shell, the air duct shell has a first mounting port, a second mounting port and a connecting port, the connecting port is connected to the air inlet duct, the air duct wall is formed between the connecting port and the first mounting port, the second mounting port passes through the air duct wall and is opposite to the first mounting port; the air guide shell has the air guide part and an air outlet part connected to one end of the air guide part, the air outlet part covers the first mounting port and is provided with the air outlet, the air guide part extends to the second mounting port and is sealed with the second mounting port.

[0009] Optionally, the air duct shell further has an annular portion, which is located outside the air duct wall and is arranged around the second installation opening. The air guide portion extends into the annular portion and is sealed with the annular portion.

[0010] Optionally, the air duct body further comprises a shell, the shell comprising the grip portion and a mounting portion located at one end of the grip portion, one side of the mounting portion being flush with the grip portion, and the other side of the mounting portion being protruding relative to a side surface of the grip portion, the air duct housing and the air guide housing being disposed within the mounting portion;

[0011] Optionally, the first mounting port and the second mounting port are coaxially arranged, and the axis of the connecting port and the axis of the first mounting port are skew lines.

[0012] Optionally, the surface of the air guide portion located in the air outlet duct is a cylindrical surface.

[0013] Optionally, the air guide portion has a through hole, and the through hole passes through both ends of the air duct body along the first direction.

[0014] Optionally, the handheld hair dryer further includes a heating device, which is arranged between the fan assembly and the air outlet duct.

[0015] Optionally, the heating device includes a ceramic heating element, which is ring-shaped and has two wiring parts and two heating parts connected between the two wiring parts, and the two heating parts are symmetrically arranged about the line connecting the two wiring parts.

[0016] Optionally, the heating portion is bent in multiple sections in the circumferential direction of the ceramic heating element to form multiple ventilation grooves on the inner and outer sides of the heating portion, and the ventilation grooves are through-set at both ends in the length direction of the gripping portion.

[0017] Optionally, the heating device includes a battery, a main control board and a charging component, the battery, the charging component and the fan assembly are all electrically connected to the main control board, and the battery and the main control board are arranged in the air inlet duct.

[0018] The beneficial effects of the present invention are as follows: by providing an air guide portion and an air duct wall on the main body of the air duct, the air guide portion extends in a first direction perpendicular to the length direction of the grip portion, and the air duct wall surrounds the outer periphery of the air guide portion at intervals to form an air outlet duct between the air guide portion and the air duct wall. The air inlet duct located on the grip portion is then directed toward a position between one side of the air guide portion and the air duct wall. When the airflow in the air inlet duct flows toward the air outlet duct, the airflow can enter the air outlet duct from one side of the air guide portion. Compared to a situation where the air inlet duct directly faces the air guide portion and the airflow enters the air outlet duct from both sides of the air guide portion, this can reduce the collision of the two airflows on the side of the air guide portion away from the air inlet duct. Instead, the airflow spirals around the air guide portion in the air outlet duct toward the air outlet, reducing turbulence when the airflow flows from the air inlet duct to the air outlet duct, thereby reducing airflow loss, ensuring a large and stable air outlet volume, and achieving a better air outlet effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of an embodiment of the handheld hair dryer of the present utility model;

[0021] Figure 2 for Figure 1 Top view of the handheld hairdryer;

[0022] Figure 3 for Figure 2 Cross-sectional view at XX in the middle;

[0023] Figure 4 for Figure 1 Middle handheld hairdryer front view;

[0024] Figure 5 for Figure 4 Cross-sectional view at YY in the middle;

[0025] Figure 6 for Figure 5 Schematic diagram of the structure of the stroke shell;

[0026] Figure 7 for Figure 6 Schematic diagram of the structure of the stroke shell from another angle;

[0027] Figure 8 for Figure 5 Schematic diagram of the structure of the middle air guide shell;

[0028] Figure 9 for Figure 5 Schematic diagram of the structure of the ceramic heating element;

[0029] Figure 10 for Figure 9 Front view of the ceramic heating element.

[0030] Description of Figure Numbers:

[0031] 10. Air duct body; 11. Outer shell; 111. Grip; 112. Air inlet duct; 113. Mounting portion; 12. Duct shell; 121. First mounting port; 122. Second mounting port; 123. Connecting port; 124. Duct wall; 125. Guide wall; 126. Ring portion; 13. Air guide shell; 131. Air guide portion; 132. Through hole; 133. Air outlet portion; 134. Air outlet; 14. Air outlet duct; 15. Sealing gasket; 20. Fan assembly; 31. Ceramic heating element; 311. Wiring portion; 312. Heating portion; 313. Ventilation slot; 40. Battery; 50. Main control board.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The utility model provides a handheld hair dryer.

[0037] In the embodiment of the present utility model, Figures 1 to 10 As shown, the handheld hair dryer includes a hair dryer body 10 and a fan assembly 20. The hair dryer body 10 has a grip portion 111, an air inlet duct 112 located in the grip portion 111, an air guide portion 131 located at one end of the air inlet duct 112, and an air duct wall 124. The air guide portion 131 extends along a first direction perpendicular to the length direction of the grip portion 111, and the air duct wall 124 is spaced around the outer periphery of the air guide portion 131 to form an air outlet duct 14 between the air guide portion 131. The air inlet duct 112 is directed toward a position between one side of the air guide portion 131 and the air duct wall 124 to communicate with the air outlet duct 14; the fan assembly 20 is arranged in the air inlet duct 112, and the fan assembly 20 is used to drive the airflow to flow through the air inlet duct 112 and the air outlet duct 14 in sequence.

[0038] Specifically, the hair dryer body 10 has an air outlet 134, which is connected to the end of the air outlet duct 14 away from the air inlet duct 112. When in use, the air flow blown out from the air outlet 134 dries the hair or items. Figure 5 As can be understood from the direction indicated by the middle arrow Q, the air guide portion 131 is substantially parallel to the first direction.

[0039] The air inlet duct 112 is oriented toward a position between one side of the air guide portion 131 and the air duct wall 124, that is, the air inlet duct 112 is disposed toward one side of the air guide portion 131, so that when the air in the air inlet duct 112 flows toward the air outlet duct 14 ( Figure 3 The dotted arrow in the middle indicates the direction of air flow), which allows the air flow to enter the air outlet duct 14 from one side of the air guide portion 131 and spirally flow toward the air outlet 134 in the air outlet duct 14 around the air guide portion 131. This can reduce the turbulence of the air flow when it flows from the air inlet duct 112 to the air outlet duct 14, making the air outlet volume large and not chaotic.

[0040] The present invention provides an air guide portion 131 and an air duct wall 124 on the air duct body 10, such that the air guide portion 131 extends in a first direction perpendicular to the length of the grip portion 111. The air duct wall 124 surrounds the outer periphery of the air guide portion 131 at intervals, forming an air outlet duct 14 between the air guide portion 131 and the air duct wall 124. The air inlet duct 112 located on the grip portion 111 is then directed toward a position between one side of the air guide portion 131 and the air duct wall 124. When airflow within the air inlet duct 112 flows toward the air outlet duct 14, it can enter the air outlet duct 14 from one side of the air guide portion 131. Compared with the situation where the air inlet duct 112 is directly opposite the air guide portion 131 and the air flow enters the air outlet duct 14 from both sides of the air guide portion 131, this can reduce the collision of the two air flows on the side of the air guide portion 131 away from the air inlet duct 112. Instead, the air flow spirals around the air guide portion 131 in the air outlet duct 14 to flow toward the air outlet 134, which can reduce the turbulence of the air flow when flowing from the air inlet duct 112 to the air outlet duct 14, thereby reducing the air flow loss, making the air outlet volume large and not chaotic, and the air outlet effect better.

[0041] In some embodiments, the air duct wall 124 has a guide wall 125, which spirally extends from the air inlet duct 112 toward the air outlet 134 around the air guide portion 131, that is, the guide wall 125 is set as a smooth curved surface, which can better guide the airflow and reduce the possibility of the airflow hitting the air duct wall 124 and generating turbulence.

[0042] In some embodiments, the air duct body 10 includes a duct shell 12 and an air guide shell 13, the duct shell 12 has a first mounting port 121, a second mounting port 122 and a connecting port 123, the connecting port 123 is connected to the air inlet duct 112, and a duct wall 124 is formed between the connecting port 123 and the first mounting port 121, the second mounting port 122 passes through the duct wall 124 and is opposite to the first mounting port 121; the air guide shell 13 has an air guide portion 131 and an air outlet portion 133 connected to one end of the air guide portion 131, the air outlet portion 133 covers the first mounting port 121 and is provided with an air outlet 134, the air guide portion 131 extends to the second mounting port 122 and is sealed between the second mounting port 122. Specifically, the air duct housing 12 and the air guide housing 13 are formed separately and then assembled together. When air in the air inlet duct 112 flows into the connecting port 123, the airflow is blocked by the air guide portion 131 from the second mounting port 122 and can only flow toward the first mounting port 121 before finally flowing out of the air outlet 134. This facilitates the separate molding of the air duct housing 12 and the air guide housing 13, reducing production difficulty and cost.

[0043] In some embodiments, the first mounting port 121 and the second mounting port 122 are coaxially arranged, and the axis of the connecting port 123 and the axis of the first mounting port 121 are skew lines, that is, the axis of the connecting port 123 and the axis of the first mounting port 121 are not in the same plane. This makes it convenient to form a guide wall 125 between the connecting port 123 and the first mounting port 121, and can make the shape of the air duct shell 12 consistent with the shape of the air duct wall 124, thereby avoiding the situation where the external dimensions of the air duct shell 12 are too large.

[0044] In some embodiments, the air duct shell 12 further has an annular portion 126, which is located outside the air duct wall 124 and is arranged around the second mounting opening 122. The air guide portion 131 extends into the annular portion 126 and is sealed with the annular portion 126. This arrangement can increase the matching length of the air guide portion 131 and the air duct shell 12, and can improve the connection stability between the air duct shell 12 and the air guide shell 13. Optionally, a sealing gasket 15 is provided between the annular portion 126 and the air guide portion 131, that is, during design and production, the gap between the annular portion 126 and the air guide portion 131 can be made larger, and during assembly, the gap between the annular portion 126 and the air guide portion 131 is sealed by the sealing gasket 15. In this way, the matching accuracy requirements between the annular portion 126 and the air guide portion 131 can be reduced, which can reduce production costs.

[0045] In some embodiments, the hair duct body 10 also includes an outer shell 11, which has a grip portion 111 and a mounting portion 113 located at one end of the grip portion 111. One side of the mounting portion 113 is flush with the grip portion 111, and the other side of the mounting portion 113 is protruding compared to the side of the grip portion 111. A duct shell 12 and an air guide shell 13 are provided in the mounting portion 113.

[0046] In some embodiments, the surface of the air guide portion 131 located in the air outlet duct 14 is a cylindrical surface, which can make the structure of the air guide portion 131 simple and easy to shape. At the same time, it can allow the airflow to flow better around the air guide portion 131, avoiding the air guide portion 131 causing disturbances to the airflow.

[0047] In some embodiments, the air guide portion 131 has a through hole 132 that passes through both ends of the air duct body 10 along the first direction. That is, the portion of the air duct body 10 located at one end of the grip portion 111 is hollow, which can simplify the structure of the air guide portion 131, facilitate molding, and reduce production costs.

[0048] In some embodiments, the handheld hair dryer further includes a heating device, which is positioned between the fan assembly 20 and the air outlet duct 14. This position of the heating device close to the air outlet 134 shortens the flow path of the hot air within the hair dryer body 10, reducing heat loss. It also prevents the hot air from flowing through the fan assembly 20, thus preventing overheating of the fan assembly 20. Of course, in other embodiments, the heating device can also be positioned on the side of the fan assembly 20 away from the air outlet duct 14.

[0049] In some embodiments, the heating device includes a ceramic heating element 31, which is annular and has two wiring portions 311 and two heating portions 312 connected between the two wiring portions 311, and the two heating portions 312 are symmetrically arranged about the line connecting the two wiring portions 311. Specifically, the ceramic heating element 31 is a heating structure as a whole, and the handheld hair dryer also includes a main control board 50. The two wiring portions 311 are electrically connected to the main control board 50, one of the wiring portions 311 is used to connect to the positive pole of the power supply, and the other wiring portion 311 is used to connect to the negative pole of the power supply. After the power is turned on, current flows through the two heating portions 312, thereby converting electrical energy into thermal energy. When air flows through the surface of the heating portion 312, the air flow can be heat-exchanged with the heating portion 312, thereby heating the air flow flowing through the ceramic heating element 31. Compared with electric heating wires, the ceramic heating element 31 has a high heating efficiency, which can make the size of the ceramic heating element 31 smaller, thereby reducing the overall size of the heating device. Moreover, the ceramic heating element 31 will not melt even if used for a long time, and has a longer service life. In addition, by arranging the two heating parts 312 symmetrically about the line connecting the two wiring parts 311, the lengths and cross-sections of the two heating parts 312 can be made roughly the same. When current is passed through, the two heating parts 312 can be heated evenly, so that the air flow in the air outlet duct 14 is heated evenly, thereby improving the air outlet effect.

[0050] Optionally, the heating portion 312 is bent in multiple sections along the circumferential direction of the ceramic heating element 31, so as to form a plurality of ventilation slots 313 on both the inner and outer sides of the heating portion 312. The ventilation slots 313 are provided at both ends along the length of the grip portion 111. This can increase the surface area of ​​the heating portion 312, thereby improving the heat exchange efficiency. In other embodiments, the heating portion 312 is provided with multiple vias, each of which is provided at both ends along the length of the grip portion 111.

[0051] Of course, in other embodiments, the ceramic heating element 31 includes an inner ring portion, an outer ring portion with a spacer ring disposed outside the inner ring portion, and multiple connecting portions connecting the inner and outer ring portions. The multiple connecting portions are spaced apart circumferentially around the inner ring portion, and heat exchange holes are formed between any two adjacent connecting portions. This increases the surface area of ​​the ceramic heating element and improves heat exchange efficiency.

[0052] In some embodiments, the ceramic heating element 31 is a silicon carbide ceramic heating element 31. Specifically, the silicon carbide ceramic heating element 31 is made of silicon carbide ceramic material. By adopting the silicon carbide ceramic heating element 31 as the ceramic heating element 31, the heating efficiency of the ceramic heating element 31 can be improved and the heating rate can be increased. Among them, the silicon carbide ceramic heating element 31 can use silicon carbide powder as the main sintering phase raw material and mix it with one or more conductive phase raw materials of titanium nitride powder, zirconium nitride powder, titanium carbonitride powder, titanium carbide powder, zirconium carbide powder, thallium carbide powder, hafnium carbide powder, titanium boride powder, zirconium boride powder, molybdenum silicide powder and tungsten carbide powder, and then shape and sinter it according to the designed shape. For example, silicon carbide powder, yttrium oxide powder, aluminum oxide powder and titanium boride powder can be uniformly mixed in a certain mass ratio, and then water is added as a solvent, and the mixture is uniformly mixed using a ball mill, and then spray-dried. The dry powder is heated and mixed with paraffin wax in a certain mass ratio, and poured into a hot die casting machine to complete the hot die casting. After the green body is dried, it is placed in a sintering furnace for sintering to obtain the silicon carbide ceramic heating element 31. Of course, in other embodiments, zirconium oxide, aluminum oxide, yttrium oxide, silicon oxide or silicon nitride can also be used as the main sintering phase raw materials.

[0053] In some embodiments, the heating device includes a battery 40, a main control board 50 and a charging component. The battery 40, the charging component and the fan assembly 20 are all electrically connected to the main control board 50, and the battery 40 and the main control board 50 are arranged in the air inlet duct 112. That is, the fan assembly 20 and the heating device can be powered by the battery 40, which reduces the constraints of the power cord and is convenient for use in environments such as outdoors where wiring is inconvenient. Moreover, when the heating device adopts a ceramic heating element 31, the power consumption of the handheld hair dryer can be lower. When powered by the battery 40, the battery life is longer, which is convenient for users to use. Among them, the charging component can be an interface socket (such as a Type-C socket) or a wireless charging coil, etc.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A handheld hair dryer, characterized in that: include: The air duct body comprises a grip portion, an air inlet duct located within the grip portion, an air guide portion located at one end of the air inlet duct, and an air duct wall, wherein the air guide portion extends in a first direction perpendicular to the length direction of the grip portion, the air duct wall surrounds the outer periphery of the air guide portion at intervals to form an air outlet duct between the air guide portion and the air duct wall, and the air inlet duct faces a position between one side of the air guide portion and the air duct wall to communicate with the air outlet duct; and A fan assembly is provided in the air inlet duct, and is used to drive the air flow to flow through the air inlet duct and the air outlet duct in sequence.

2. The handheld hairdryer according to claim 1, wherein: The air duct body has an air outlet, which is connected to one end of the air outlet duct away from the air inlet duct. The air duct wall has a guide wall, which spirally extends from the air inlet duct toward the air outlet around the air guide portion.

3. The handheld hairdryer according to claim 2, wherein: The air duct main body includes an air duct shell and an air guide shell, the air duct shell has a first mounting port, a second mounting port and a connecting port, the connecting port is connected to the air inlet duct, the air duct wall is formed between the connecting port and the first mounting port, the second mounting port passes through the air duct wall and is opposite to the first mounting port; the air guide shell has the air guide part and an air outlet part connected to one end of the air guide part, the air outlet part covers the first mounting port and is provided with the air outlet, the air guide part extends to the second mounting port and is sealed with the second mounting port.

4. The handheld hairdryer according to claim 3, wherein: The air duct shell further has an annular portion, which is located outside the air duct wall and is arranged around the second installation opening. The air guide portion extends into the annular portion and is sealed with the annular portion.

5. The handheld hairdryer according to claim 3, wherein: The air duct body further includes a housing having the grip portion and a mounting portion located at one end of the grip portion, one side of the mounting portion being flush with the grip portion, and the other side of the mounting portion being protruding relative to the side of the grip portion, wherein the air duct housing and the air guide housing are disposed within the mounting portion; And / or, the first mounting port and the second mounting port are coaxially arranged, and the axis of the connecting port and the axis of the first mounting port are skew lines.

6. The handheld hairdryer according to any one of claims 1 to 5, characterized in that: The surface of the air guide portion located in the air outlet duct is a cylindrical surface; And / or, the air guide portion has a through hole, and the through hole passes through both ends of the air duct body along the first direction.

7. The handheld hairdryer according to claim 1, wherein: The handheld hairdryer further comprises a heating device, which is arranged between the fan assembly and the air outlet duct.

8. The handheld hairdryer according to claim 7, wherein: The heating device includes a ceramic heating element, which is ring-shaped and has two connecting parts and two heating parts connected between the two connecting parts. The two heating parts are symmetrically arranged about the line connecting the two connecting parts.

9. The handheld hairdryer according to claim 8, wherein: The heating portion is bent in multiple sections in the circumferential direction of the ceramic heating element to form a plurality of ventilation grooves on the inner and outer sides of the heating portion. The ventilation grooves are through-set at both ends in the length direction of the gripping portion.

10. The handheld hairdryer according to claim 7, wherein: The heating device includes a battery, a main control board and a charging component. The battery, the charging component and the fan assembly are all electrically connected to the main control board. The battery and the main control board are arranged in the air inlet duct.

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