Hair dryer

Abstract

To realize a heating device that can blow a large amount of wind while realizing size reduction.SOLUTION: A hair dryer (1) according to one embodiment of a heating device comprises a cylindrical inner cylinder part (5) inside a main body (2). A second air passage (20H) through which air flows in a cylinder of the inner cylinder part (5) toward a blowing port (3), and a first air passage (20C) through which air flows between an outer peripheral surface of the inner cylinder part (5) and an inner surface of the main body (2) toward the blowing port (3) are formed inside the main body (2). A first air blowing part (7) for sending air to the inside of the main body (2) is installed in a suction port (4) of the main body (2). A second air blowing part (8) for sending air into the cylinder of the inner cylinder part (5), and a heating part (52) for heating air in the cylinder are installed in the inner cylinder part (5).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention provides Hair dryer Regarding. [Background technology]

[0002] Heating devices that dry objects using warm air are known. A typical example is a hair dryer. Hair dryers are required to be able to dry hair in a short time (quick drying). Therefore, one of the important functions of a hair dryer is to have a "large air volume." For example, Patent Document 1 discloses a configuration in which two sets of motors and fans rotated by the motors are arranged along the axial direction to blow out a large volume of air.

[0003] In addition, there is a demand for smaller hair dryer bodies. However, when the body of a hair dryer is made smaller, the size of the fan inevitably becomes smaller, making it difficult to ensure a large air volume. Even when two fans are used and the fans rotate at high speed as mentioned above, although the air speed increases due to the high speed rotation, it is difficult to ensure the desired large air volume. In other words, it can be said that ensuring air volume and realizing compactness are mutually exclusive at first glance.

[0004] Furthermore, conventional hair dryers are known to have various other functions. For example, Patent Document 2 shows a hair dryer that simultaneously emits hot air and cold air (unheated air), and also has an ion generator that emits negative ions in the cold air flow path. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 3-131207 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-208935 Summary of the Invention [Problem to be solved by the invention]

[0006] When trying to make the body of a hair dryer smaller, the size (outer diameter) of the fan becomes smaller, which reduces the air volume and the area through which the air passes, making it difficult to ensure a large air volume. This is because even if two fans are connected together and rotated at high speed as in Patent Document 1, it is difficult to ensure the desired air volume.

[0007] One aspect of the present invention is a fan that can blow out a large volume of air while keeping the size of the main body small. Hair dryer The purpose is to provide the following. [Means for solving the problem]

[0008] In order to solve the above problems, according to one aspect of the present invention, Hair dryer The air conditioner comprises a main body having an air intake port and an air outlet port, and a cylindrical inner cylinder portion disposed inside the main body, and inside the main body, a second air passage through which air flows inside the inner cylinder portion toward the air outlet port, and a first air passage through which air flows between the outer peripheral surface of the inner cylinder portion and the inner surface of the main body toward the air outlet port, and the air intake port of the main body is connected to a second air passage through which air flows inside the main body toward the air outlet port. a first blade and a first motor that drives the first blade; A first blower is provided in the inner cylinder, and the first blower blows air into the inner cylinder. a second blade and a second motor that drives the second blade; A second blower and a heater for heating the air in the cylinder are provided. [Effects of the Invention]

[0009] According to one aspect of the present invention, it is possible to blow out a large volume of air while keeping the size of the main body small. Hair dryer can provide. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram of a hair dryer, which is an embodiment of a heating device according to an aspect of the present invention. [Figure 2] FIG. 2 is a diagram showing the hair dryer of FIG. 1 with a nozzle attached. [Figure 3] 2 is a cross-sectional view of the hair dryer taken along the line SS' shown in FIG. 1B. [Figure 4] FIG. 4 is a diagram of the area enclosed by the dotted line in FIG. 3. [Figure 5] 2A and 2B are side views of a first blade and a second blade mounted on the hair dryer of FIG. 1; [Figure 6] 2 is a view of the hair dryer of FIG. 1 seen from the air outlet side, with the front grill and inner cylinder part mounted on the hair dryer of FIG. 1 disassembled. FIG. [Figure 7] FIG. 3 is a diagram showing the configuration of a nozzle of the hair dryer shown in FIG. 2. [Figure 8] FIG. 3 is a diagram showing details of the hair dryer shown in FIG. 2, and is a partially enlarged view showing how the nozzle is attached to the main body via the front grill. [Figure 9] 1B, a view of the hair dryer from the air outlet side (A in the figure), and a view of the internal structure excluding the main body and inner cylinder part (B in the figure). DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of a heating device according to one aspect of the present invention will be described in detail below. In this embodiment, a hair dryer will be described as an example of a heating device, but the heating device is not limited to a hair dryer. That is, any heating device that heats intake air to generate warm air and blows the generated warm air from an outlet is included in one aspect of the present invention. In particular, the present invention can be suitably applied to a so-called dryer that dries an object by blowing out warm air.

[0012] Figure 1 shows a side view (Fig. 1A) of the hair dryer 1 of this embodiment, a view from the side of the air outlet 3 from which air is blown out (Fig. 1B), and a view from the side of the air inlet 4 (Fig. 1C). For ease of explanation, Fig. 1A is a partially see-through view so that the inside of the main body 2 of the hair dryer 1 can be seen.

[0013] As shown in FIG. 1, the hair dryer 1 includes a main body 2 having an air inlet 4 and an air outlet 3 .

[0014] The main body 2 constitutes the outer shell of the hair dryer as a housing. The main body 2 has a cylindrical structure, and a cylindrical inner cylinder portion 5 is disposed inside the main body 2 having the cylindrical structure.

[0015] The main body 2 is fitted with a grip 11 that is held by the user of the hair dryer 1 while in use. The grip 11 also has a power switch 13 for turning the dryer on and off, and an air volume adjustment switch (slide switch) 14 for changing the air volume from the air outlet 3. A front grill 30 is also provided at the air outlet 3. A display (for example, a half-mirror coated digital display) may also be provided on the side of the main body to inform the user of the usage status of the hair dryer 1.

[0016] In the following explanation, the positional relationship of each component will be explained using a three-dimensional coordinate system of XYZ, where the central axis of the cylindrical main body 2 is defined as the Y axis, the extension direction of the grip portion 11 is defined as the Z axis, and the axis perpendicular to both the Y axis and the Z axis is defined as the X axis. This three-dimensional XYZ coordinate system is also shown in each figure.

[0017] The air inlet 4 and the air outlet 3 are located at both ends along the Y axis of the main body 2. Specifically, the air inlet 4 is provided at the end of the main body 2 on the negative side of the Y axis, and the air outlet 3 is provided at the end of the main body 2 on the positive side of the Y axis. As shown by the arrow in Fig. 1A, air outside the hair dryer 1 is drawn into the main body 2 by the air inlet 4, and air that has passed through an air passage inside the main body 2 is blown out from the air outlet 3.

[0018] As shown in Figure 1, the hair dryer 1 can be used without attaching a nozzle to the main body 2, but as shown in Figure 2, which shows a hair dryer with a nozzle installed, the nozzle 6 can be detachably attached to the air outlet 3 of the main body 2 of the hair dryer 1, and the hair dryer can also be used with the nozzle 6 attached. By attaching the nozzle, the air can be further narrowed, increasing the air pressure and improving quick drying. The nozzle 6 will be described later.

[0019] Fig. 3 is a cross-sectional view of the hair dryer 1 taken along the cutting line SS' shown in Fig. 1B. The air passage inside the main body 2 will be further described with reference to Fig. 3.

[0020] As shown in Fig. 3, inside the main body 2, there are formed a second air passage 20H through which air drawn in from the air inlet 4 flows inside the inner cylindrical portion 5 toward the air outlet 3, and a first air passage 20C through which air flows between the outer peripheral surface 5a of the inner cylindrical portion 5 and the inner surface 2a of the main body 2 toward the air outlet 3. When viewed from the air outlet 3 side, the first air passage 20C can be said to be configured in a circular ring shape along the outer periphery of the inner cylindrical portion 5. In short, the second air passage 20H and the first air passage 20C are separated by the cylindrical body of the inner cylindrical portion 5, and the main body 2 and the inner cylindrical portion 5 of the main body 2 form a double-pipe-like configuration, forming the two air passages 20H and 20C.

[0021] The main body 2 is provided with a first blower 7 at the inlet 4 to send air into the main body 2. The first blower 7 includes a first blade 71, a first cylinder 73 enclosing the first blade 71, and a first motor 75 for driving the first blade 71. A brushless motor can be used as the first blower 7. The first motor 75 drives the first blade 71, causing the first blade 71 to rotate around its axis of rotation. As a result, air outside the hair dryer 1 is drawn into the main body 2 through the inlet 4. The air drawn into the main body 2 by the first blower 7 flows through the second air passage 20H and the first air passage 20C.

[0022] 4 is a diagram of the area enclosed by a dotted line in FIG. 3, and is a front view of the air inlet 4. For ease of explanation, FIG. 4 shows the air inlet 4 with the filter separately attached thereto removed. The filter will be described later. As shown in FIG. 4, the diameter of the air inlet 4 is larger than the outer diameter of the first blower section 7.

[0023] Specifically, the diameter of the suction port 4 is larger than the outer diameter of the first cylindrical body 73. As a result, a gap is formed between the inner periphery of the suction port 4 and the first blower unit 7 (first cylindrical body 73). In this way, the space formed between the inner periphery of the suction port 4 and the first blower unit 7 (first cylindrical body 73) serves as a passageway for air to be drawn from the outside of the hair dryer into the inside of the main body 2. Note that although this passageway itself does not have any structure for drawing air, when the first blower unit 7 draws air through the first cylindrical body 73 at the center side of the suction port 4, air is also drawn through the passageway.

[0024] 4, the first motor 75 has a first cylindrical body 73 that is cylindrical in front view, and therefore a circular passage is formed on the outer periphery of the first motor 75. However, the shape of the first cylindrical body 73 of the first motor 75 is not limited to a cylindrical shape and may be, for example, a rectangular shape such as a square shape in front view. In the case of a square first cylindrical body 73, the shape of the passage in front view does not have to be a continuous circular shape as shown in FIG. 4, and multiple arc-shaped passages may be lined up on the outer periphery of the square first cylindrical body 73.

[0025] As shown in Fig. 3, a second blower 8, which is different from the first blower 7 that sends air into the interior of the inner cylinder 5, is installed in the inner cylinder 5 of the main body 2. The second blower 8 is disposed at the end of the inner cylinder 5 on the side of the inlet 4. Furthermore, a heating unit 52, which will be described later, is disposed in a position where it heats the air flowing from the second blower 8, and the air heated by the heating unit 52 is blown out from the outlet 3.

[0026] Furthermore, second blower 8 may have second cylindrical body 83, which is a cylindrical outer shell. Second cylindrical body 83 is arranged so that its central axis is coaxial with the central axis of inner cylindrical portion 5, and second cylindrical body 83 and inner cylindrical portion 5 are connected via an appropriate connecting member. Note that second blower 8, which blows air into second air passage 20H, is arranged inside inner cylindrical portion 5. Furthermore, second blower 8 may be arranged inside second cylindrical body 83, which is configured as a separate body inside inner cylindrical portion 5.

[0027] The second blower 8 has second blades 81, which are enclosed by a second cylindrical body 83. The second blower 8 employs a motor (e.g., a brushless motor) capable of high-speed rotation and includes a rectifying vane (not shown) on the outlet 3 side of the second blades 81. The second blower 8 also has a second motor 85 that drives the second blades 81. The second motor 85 drives the second blades 81, causing the second blades 81 to rotate around the rotation axis. As a result, air from the inner cylinder 5 and the air inlet 4 (first blower 7) inside the main body 2 is drawn into the inner cylinder 5. The air drawn into the inner cylinder 5 becomes the air flowing through the second air passage 20H described above. When the air passes through the second cylindrical body 83, the air is also drawn into the inner cylinder 5 via the second cylindrical body 83. The air drawn into the interior of inner cylindrical portion 5 becomes the air flowing through second air passage 20H described above.

[0028] In addition, a motor frame and a motor bracket may be provided for installing the second motor 85.

[0029] Furthermore, the main body 2 has a heating section 52 disposed in the inner cylindrical section 5 for heating the air inside the cylinder.

[0030] This heating section 52 may be made up of, for example, an electric heating wire or the like, and may be a heating section means mounted on a conventionally known hair dryer. More specifically, the heating section 52 (including, for example, an electric heating wire or heater) is installed around an insulating substrate 51 that extends along the central axis of the inner cylinder 5 to the air outlet 3. Incidentally, the insulating substrate 51 is made up of two insulating substrates forming a cross, but it may also be made up of three insulating substrates 51. The air drawn into the inner cylinder 5 by the second air blower 8 is heated by this heating section to a predetermined temperature.

[0031] The air heated to a predetermined temperature flows only inside the cylinder of inner cylinder portion 5. That is, the heated air flows only through second air passage 20H.

[0032] There is no heating section 52 in the first air passage 20C, and the air flowing through the first air passage 20C is only unheated air drawn in from outside the hair dryer 1 by the first blower section 7.

[0033] Here, we will further explain the first blower 7 installed near the air inlet 4 of the main body 2 and the second blower 8 installed in the inner cylinder 5. Both the first blower 7 and the second blower 8 have blades, but the first blower 7 and the second blower 8 are physically separated from each other. The separation distance is 10% or more longer than the radius of the blades of the second blower 8 (for example, a separation distance of 2 to 3 cm).

[0034] Furthermore, the rotating shafts of the motors are each connected to the corresponding blade (for example, the first motor 75 is connected to the first blade 71, and the second motor 85 is connected to the second blade 81), in other words, the motor shafts are not shared directly or indirectly with each other.

[0035] Fig. 5 shows the first and second blades mounted on the hair dryer of Fig. 1. Each blade of the first blade 71 is made of resin, and each blade of the second blade 81 is made of metal. The rotation speed of the first blower unit 7 is, for example, 7000 to 8000 rpm, and the maximum rotation speed of the second blower unit 8 is 75000 to 80000 rpm. The second blade of the second blower unit 8 is made of metal because it rotates at a higher speed.

[0036] The second air blower 8 has a higher blade rotation speed than the first air blower 7. By increasing the rotation speed of the second air blower 8 in this way, the air drawn into the main body 2 by the first air blower 7 can be efficiently guided into the inner tube 5. Furthermore, the rotation speed is significantly faster than that of the first air blower 7, and air can be pushed out of the air outlet 3 in one go with high air pressure, which has the effect of increasing the air speed and improving the drying speed.

[0037] When the power switch 13 is operated from OFF to ON, both the first motor 75 and the second motor 85 are turned ON (driven). When the power switch 13 is operated from ON to OFF, both the first motor 75 and the second motor 85 are turned OFF (stopped driving).

[0038] Furthermore, the first motor of the first blower 7 installed near the air inlet 4 of the main body 2 is controlled to keep the air volume constant. On the other hand, the second blower 8 installed in the inner cylinder 5 does not keep the air volume constant, but is configured to be switchable between multiple levels of air volume. In one example, the second blower 8 can switch the air volume between five levels.

[0039] Even when the second motor 85 is at the minimum rotation speed for the airflow rate, the rotation speed is set higher than the rotation speed of the first motor 75.

[0040] Furthermore, the first blower 7 and the second blower 8 are configured to rotate their blades in the same direction. In this way, the individual blades of the first blades 71 and the individual blades of the second blades 81 rotate in the same direction, so that a large volume of air can be blown out from the outlet 3. As an example, when the nozzle 6 is not attached, the airflow can be 1.5 m 3 / min (measured according to the method based on JIS C 9613) or more of air can be blown out from the air outlet 3.

[0041] Note that the individual blades of first blades 71 and the individual blades of second blades 81 may have the same shape or different shapes. Also, the number of blades may be different as shown in Fig. 5, but may also be the same number.

[0042] Next, the configuration of the nozzle 6 and the manner in which the nozzle 6 is attached to the main body 2 will be described.

[0043] First, in FIG. 2, the nozzle 6 is attached to the air outlet 3 of the main body 2. As shown in FIG.

[0044] 6 is an exploded perspective view of the front grill 30, the plate 55, and the inner cylinder portion 5 as viewed from the air outlet 3 side. For ease of explanation, FIG. 6 shows the state in which the main body 2 is removed.

[0045] 6, plate 55 is attached to the outlet of second air passage 20H, i.e., the outlet of inner cylinder 5. Plate 55 has a mesh structure with a large area through which air passes, allowing the air blowing out from the outlet of second air passage 20H to pass through without being blocked. Plate 55 may be fixed to inner cylinder 5.

[0046] The front grille 30 is disposed adjacent to the plate 55 on the Y-axis positive side of the plate 55. The front grille 30 may also be fixed to the inner cylindrical portion 5, similar to the plate 55.

[0047] Front grill 30 is open to allow passage of the air blown out from air outlet 3. Specifically, front grill 30 has first outlet 33C provided at a position opposite the outlet of first air passage 20C and second outlet 33H provided at a position opposite the outlet of second air passage 20H.

[0048] As described above, first air passage 20C is configured in a circular ring shape along the outer periphery (5a) of inner cylinder portion 5 when viewed from air outlet 3. Therefore, in front grille 30, second outlet 33H is formed in a substantially circular shape at the center, similar to the positional relationship between air passages 20H and 20C.

[0049] The first outlet 33C is concentric with the circular second outlet 33H and is formed in an annular shape around the outer periphery of the second outlet 33H. The front grille 30 also has a mesh-like structure with a large airflow area, similar to the plate 55. The first outlet 33C is divided into multiple sections, and the second outlet 33H is also divided into multiple sections. The respective divided shapes of the first outlet 33C and the second outlet 33H are not limited to those shown in FIG. 6. The respective shapes of the first outlet 33C and the second outlet 33H are also not limited to those shown in FIG. 6.

[0050] The front grille 30 also has a wall portion 35 at the boundary between the first outlet 33C and the second outlet 33H, facing outward from the main body 2. Specifically, the wall portion 35 has a shape that protrudes in the direction in which the air blows out.

[0051] As shown in Figure 6, when the front grille 30 is viewed from the air outlet side (viewed from the Y-axis positive side toward the Y-axis negative side), the wall portion 35 is annular and located between the outer peripheral edge of the circular second outlet 33H and the inner peripheral edge of the annular first outlet 33C, and has a tubular (cylindrical) configuration that protrudes from the Y-axis positive side surface of the front grille 30 toward the Y-axis positive side.

[0052] The wall portion has a groove 37 formed on a surface C on the first outlet 33C side. The surface C on the first outlet 33C side is the outer peripheral surface of the cylindrical wall portion .

[0053] The groove portion 37 is recessed into the cylindrical wall portion 35 on the outer circumferential surface, and is provided all around the outer circumferential surface of the cylindrical wall portion 35. Note that the groove portion 37 is not limited to being formed all around the circumference, and may be provided piecemeal.

[0054] FIG. 7 is a diagram showing the configuration of the nozzle 6. The nozzle 6 functions as an air collector, and as shown in FIGS. 7A and 7B, is configured by combining an outer nozzle 6a and an inner nozzle 6b. The outer nozzle 6a and the inner nozzle 6b have a concentric structure, and when the outer nozzle 6a and the inner nozzle 6b are combined, the outer nozzle 6a rotates relative to the inner nozzle 6b. The arrow in FIG. 7A indicates an example of the rotation direction of the outer nozzle 6a.

[0055] 7C is a view of the nozzle 6, in which the outer nozzle 6a and the inner nozzle 6b are combined, as viewed from the air blowing side. The outer nozzle 6a has air blowing portions 6aa, 6ab at three locations.

[0056] 7D is a front view of the inner nozzle 6b as seen from the base 61 side. The inner nozzle 6b has an opening 62 in its center. The air blown out from the air outlet 3 of the main body 2 enters the nozzle 6 from the base 61 side of the inner nozzle 6b of the nozzle 6, and is blown outward from the air outlets 6aa, 6ab of the outer nozzle 6a.

[0057] Depending on the overlap between the air blowing portions 6aa, 6ab of the outer nozzle 6a and the opening 62 of the inner nozzle 6b, when the outer nozzle 6a is in a predetermined position relative to the inner nozzle 6b, air can be blown out from the outer nozzle 6a over a wide area. Furthermore, by rotating the position of the outer nozzle 6a relative to the inner nozzle 6b, air with a higher wind speed and stronger wind pressure can be blown out from the outer nozzle 6a over a narrower area than the previous range.

[0058] The inner nozzle 6b is fitted into the inner circumferential portion of the outer nozzle 6a. The inner diameter of the nozzle 6 is larger than the outer diameter of the wall portion 35 in FIG.

[0059] The inner diameter of the nozzle 6 referred to here is the inner diameter of the base 61 of the inner nozzle 6b. Because the inner diameter of the nozzle 6 is larger than the outer diameter of the wall 35, the nozzle 6 is attached to the wall 35 by wrapping around the outer periphery of the cylindrical wall 35. The base 61 of the inner nozzle 6b has protrusions 67 that engage with grooves 37 provided in the wall 35. The protrusions 67 are provided at two locations symmetrical with respect to the center of the base 61 (center K shown imaginarily in FIG. 7D). Each protrusion 67 protrudes toward the center K. Each protrusion 67 protruding inward in this manner can engage with the grooves 37 provided in the wall 35, and by this engagement, the nozzle 6 is detachably attached to the air outlet 3 of the main body 2 via the front grill 30 shown in FIG. 6.

[0060] 8 is a partially enlarged view showing the nozzle 6 attached to the main body 2 via the front grill 30. For ease of explanation, the main body 2 is removed and the outer circumferential surface of the inner cylinder 5 is exposed.

[0061] As shown in FIG. 8, when the nozzle 6 is attached to the main body 2 via the front grill 30, the outer peripheral surface of the nozzle 6 is exposed to the wind blowing out from the first outlet 33C of the front grill 30.

[0062] The outer peripheral surface of the nozzle 6 is the outer peripheral surface 6s of the outer nozzle 6a. The air blown out from the first outlet 33C is unheated air that has passed through the first air passage 20C, which is surrounded by the outer peripheral surface 5a of the inner cylinder and the inner surface 2a of the main body. Therefore, unheated air, in other words, cool air, blows out from the first outlet 33C and flows along the outer peripheral surface 6s of the nozzle 6. The air flow is indicated by arrows in FIG. 8. This configuration prevents the nozzle 6 from overheating. The air blown out from the first outlet 33C flows between the outer peripheral surface 6s of the outer nozzle 6a and the front cover 12, which is installed on the air outlet 3 side of the main body 2, as shown in FIGS. 1 and 3.

[0063] This is because the protrusion 67 of the inner nozzle 6b, which is installed facing inward, engages with the groove 37 on the outside of the wall 35 of the front grille 30. As a result, even when the nozzle 6 is attached to the main body 2, the first outlet 33C of the front grille 30 is not covered by the nozzle 6.

[0064] 1C, a mesh frame is fixed closer to the main body 2, and a finely processed metal mesh filter (microfilter) fixed to the main body 2 is attached above the mesh frame (on the outside air side), and a washable filter is detachably attached above that. The first blower 7 is installed closer to the main body 2 than the main frame fixed to the main body 2.

[0065] 9A shows the hair dryer 1 as seen from the air outlet 3 side, similar to FIG. 1B (FIG. 9A), and a perspective view of the hair dryer 1 with the main body and inner cylinder removed (FIG. 9B). As shown in FIG. 9A, an ion generating unit 9 that generates negative ions is installed in the center of the air outlet 3. As shown in FIG. 9B, the ion generating unit 9 has multiple needle electrodes 91 at the tip of an insulating substrate 51 that has a heating unit 52 and faces the air outlet 3. That is, the ion generating unit 9 is installed on the insulating substrate 51. A well-known method can be used to generate negative ions using the needle electrodes 91. The generated negative ions are heated by the heating unit 52 and released to the outside from the air outlet 3 by the air that passes through the second air passage 20H.

[0066] As described above, according to the configuration of this embodiment, The device has an inner tube portion 5 inside the main body 2, a first air blowing section 7 near the inlet of the main body 2, and a second air blowing section 8 in the inner tube portion 5.Furthermore, when in operation, the rotation speed of the second air blowing section 8 is higher than the rotation speed of the first air blowing section 7, so that, for example, the volume ratio of the main body 2 can be reduced by 40% and the weight by 20% compared to conventional products, while still achieving a large air volume.

[0067] Furthermore, since the cold air is blown out while hitting the outer peripheral surface 6s of the nozzle 6, the nozzle 6 does not become abnormally hot.

[0068] [Appendix 1] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0069] [Appendix 2] According to the first aspect of the present invention Hair dryerThe air conditioner comprises a main body having an air intake port and an air outlet port, and a cylindrical inner cylinder portion disposed inside the main body, and inside the main body, a second air passage through which air flows inside the inner cylinder portion toward the air outlet port, and a first air passage through which air flows between the outer peripheral surface of the inner cylinder portion and the inner surface of the main body toward the air outlet port, and the air intake port of the main body is connected to a second air passage through which air flows inside the main body toward the air outlet port. a first blade and a first motor that drives the first blade; A first blower is provided in the inner cylinder, and the first blower blows air into the inner cylinder. a second blade and a second motor that drives the second blade; A second blower and a heater for heating the air in the cylinder are provided.

[0070] According to the configuration of the first aspect, not only can the second blower blow air into the inner tube, but the first blower installed at the intake port of the main body can also blow air to the outside of the inner tube (first air passage), thereby increasing the air volume from the outlet. This allows for quick drying despite the compact size.

[0071] According to the second aspect of the present invention Hair dryer In the configuration of the first aspect, before The diameter of the suction port may be larger than the outer diameter of the first blower section, and an inner periphery of the suction port and the first blower section may be at least partially separated from each other.

[0072] According to the configuration of the second aspect, air can be drawn in from the gap between the inner circumference of the intake port and the first blower section, and the amount of air intake can be increased compared to the diameter of the first cylindrical body 73 of the first motor 75 alone.

[0073] According to the third aspect of the present invention Hair dryer In the configuration of the first or second aspect, a front grille may be installed at the air outlet of the main body, and the front grille may have a second outlet provided at a position opposite the outlet of the second air passage and a first outlet provided at a position opposite the outlet of the first air passage, and the front grille may have a wall portion protruding toward the outside of the main body at the boundary between the second outlet and the first outlet.

[0074] According to the configuration of the third aspect, a passage for air passing through the front grille can be formed, and the second air passage and the first air passage can be maintained by the wall portion.

[0075] According to the fourth aspect of the present invention Hair dryer In the configuration of the third aspect, the wall portion may have a groove on the surface on the first outlet side.

[0076] According to the configuration of the fourth aspect, the nozzle can be engaged using the groove portion.

[0077] According to the fifth aspect of the present invention Hair dryer In the configuration of aspect 4, the air conditioner may further include a nozzle, the wall portion being cylindrical, the inner diameter of the nozzle being larger than the outer diameter of the wall portion, the nozzle having a protrusion that engages with the groove portion, and the nozzle being removably attached to the air outlet of the main body via the front grille by engaging the protrusion with the groove portion.

[0078] According to the configuration of the fifth aspect, the nozzle can be engaged with the wall of the front grille.

[0079] According to the sixth aspect of the present invention Hair dryer In the first aspect, an ion generating unit that generates negative ions may be provided at a tip of an insulating substrate that extends to the air outlet along the central axis of the inner cylindrical portion and is located on the air outlet side.

[0080] According to the configuration of the sixth aspect, it is possible to realize a configuration in which air containing negative ions is blown out.

[0081] According to the seventh aspect of the present invention Hair dryerIn the configuration of aspect 5, when the nozzle is attached to the air outlet of the main body via the front grille, the outer surface of the nozzle may form an air path for the air blown out from the first outlet of the front grille.

[0082] According to the configuration of the seventh aspect, the outer peripheral surface of the nozzle may form an air passage for unheated air (cold air) passing through the first air passage inside the main body, thereby realizing a configuration in which the nozzle is less likely to become excessively hot. [Explanation of symbols]

[0083] 1 Hair dryer (heating device) 2 Main unit 2a Inner surface 3 Air outlet 4 Intake port 5 Inner cylinder 5a outer surface of inner cylinder 6 nozzles 6a Outer nozzle 6aa, 6ab, wind outlet 6b Inner nozzle 6s Nozzle outer surface 7 First air blower 8 Second blower 9 Ion generating unit 11 Gripping part 12 Front cover 13 Power switch 14 Air volume adjustment switch 20C First Wind Channel 20H Second Airway 30 Front Grill 33C Exit 1 33H 2nd Exit 35 Wall 35C surface 37 Groove 51 Insulating substrate 52 Heating section 55 Plate 61 Base 62 Opening 67 Protrusion 71 First Feather 73 First Cylinder 75 First Motor 81 Second Feather 83 Second Cylinder 85 Second Motor 91 Needle electrode

Claims

1. a main body having an air inlet and an air outlet; a cylindrical inner cylinder portion disposed inside the main body, A second air passage through which air flows inside the inner cylindrical portion toward the air outlet, and a first air passage through which air flows between an outer peripheral surface of the inner cylindrical portion and an inner surface of the main body toward the air outlet are formed inside the main body, A heating device in which a first blowing unit that sends air into the inside of the main body is installed at the intake port of the main body, and a second blowing unit that sends air into the inside of the inner cylinder and a heating unit that heats the air inside the cylinder are installed in the inner cylinder.

2. 2. The heating device according to claim 1, wherein the first blower has a first blade and a first motor that drives the first blade, the diameter of the intake port is larger than the outer diameter of the first blower, and there is a gap between the inner circumference of the intake port and the first blower.

3. A front grill is provided at the air outlet of the main body, the front grille has a second outlet provided at a position facing the outlet of the second air passage and a first outlet provided at a position facing the outlet of the first air passage, The heating device according to claim 2 , wherein the front grill has a wall portion that protrudes outward from the main body at a boundary between the second outlet and the first outlet.

4. The heating device according to claim 3 , wherein the wall portion has a groove in a surface on the first outlet side.

5. 5. The heating device according to claim 4, further comprising a nozzle, the wall portion being cylindrical, the inner diameter of the nozzle being larger than the outer diameter of the wall portion, the nozzle having a protrusion that engages with the groove portion, and the nozzle being detachably attached to the air outlet of the main body via the front grille by engaging the protrusion with the groove portion.

6. The heating device according to claim 5 , wherein the heating unit is provided with an ion generating unit that generates negative ions.

7. 6. The heating device according to claim 5, wherein when the nozzle is attached to the air outlet of the main body via the front grill, the outer peripheral surface of the nozzle forms an air path for air blown out from the first outlet of the front grill.

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