Hair dryer

Abstract

To provide a heating device that is compact yet capable of blowing out a large volume of air. [Solution] A hair dryer (1), which is one form of a heating device, has a cylindrical inner tube portion (5) inside a main body (2). Inside the main body (2), a second air passage (20H) is formed through which air flows inside the inner tube portion (5) toward the air outlet (3), and a first air passage (20C) is formed through which air flows between the outer peripheral surface of the inner tube portion (5) and the inner surface of the main body (2) toward the air outlet (3). A first air blowing section (7) is provided at the suction port (4) of the main body (2) to send air into the inside of the main body (2). A second air blowing section (8) is provided at the inner tube portion (5) to send air into the inner tube portion (5), and a heating section (52) is provided to heat the air inside the tube.

Description

[Technical field]

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

[0002] Heating devices that dry objects using hot 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 that it has a "large air volume." For example, Patent Document 1 has 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 the main body of the hair dryer (dryer body) to be made smaller. However, when the main body of the hair dryer (dryer body) is made smaller, the size of the fan is inevitably 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, it is difficult to ensure the desired large air volume, although the air speed increases due to the high speed rotation. In other words, it can be said that ensuring air volume and realizing compactness are mutually exclusive at first glance.

[0004] In addition, conventional hair dryers are known to have various other functions. For example, the hair dryer in Patent Document 2 emits cold air (unheated air) simultaneously with hot air, and further includes an ion generating unit 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] JP 2004-208935 A Summary of the Invention [Problem to be solved by the invention]

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

[0007] One aspect of the present invention is that it is possible to blow out a large volume of air while keeping the size of the main body small. Hair dryer The purpose is to provide. [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 includes a main body having an air inlet and an air outlet, and a cylindrical inner cylinder portion disposed inside the main body. Inside the main body, a second air passage through which air flows inside the inner cylinder portion toward the air outlet, and a first air passage through which air flows between an outer peripheral surface of the inner cylinder portion and an inner surface of the main body toward the air outlet are formed. The air conditioner includes a main body having an air inlet and an air outlet, and a second air passage through which air flows inside the inner cylinder portion toward the air outlet. A first blade and a first motor for driving the first blade. A first blowing unit is provided in the inner cylinder, and a blowing unit blows air into the inner cylinder. A second blade and a second motor for driving the second blade. A second blower and a heating unit that heats the air inside the cylinder are provided. Effect 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 be provided. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram of a hair dryer, which is an embodiment of a heating device according to one aspect of the present invention. [Diagram 2] FIG. 2 is a diagram showing the hair dryer of FIG. 1 with a nozzle attached. [Diagram 3] 2 is a cross-sectional view of the hair dryer taken along line SS' shown in FIG. 1B. [Figure 4] FIG. 4 is a diagram of the area enclosed by the dotted line shown in FIG. [Diagram 5] 2A to 2C 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, showing a front grill and an inner cylinder portion mounted on the hair dryer of FIG. 1 disassembled. FIG. [Figure 7] FIG. 3 is a diagram showing a 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 a state in which a nozzle is attached to a main body via a front grill. [Figure 9] FIG. 2 is a view of the hair dryer from the air outlet side, similar to FIG. 1B (A in the figure), and a view showing the internal structure excluding the main body and inner cylinder part (B in the figure). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of a heating device according to an aspect of the present invention will be described in detail. 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. In other words, the heating device is included in one aspect of the present invention as long as it heats the intake air to generate hot air and blows the generated hot air from an outlet. In particular, the present invention can be suitably applied to a so-called dryer that dries an object by blowing out hot air.

[0012] Fig. 1 shows a side view (Fig. 1A) of a 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 body 2 of the hair dryer 1 can be seen.

[0013] As shown in FIG. 1, a 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 mainly cylindrical structure, and a cylindrical inner cylinder portion 5 is disposed inside the main body 2 having the cylindrical structure.

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

[0016] In the following description, the positional relationship of each component will be described using three-dimensional coordinates of the XYZ system, in which the central axis of the cylindrical main body 2 is defined as the Y axis, the extension direction of the gripping 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. These three-dimensional coordinates are also shown in each drawing.

[0017] The suction inlet 4 and the outlet 3 are located at both ends along the Y axis of the main body 2. Specifically, the suction inlet 4 is provided at the end of the main body 2 on the negative side of the Y axis, and the 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 A of Fig. 1, air outside the hair dryer 1 is sucked into the main body 2 by the suction inlet 4, and air that has passed through an air passage inside the main body 2 is blown out from the 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 be used with the nozzle 6 attached. By attaching the nozzle, the air can be further narrowed and the air pressure is faster, improving the quick drying performance. The nozzle 6 will be described later.

[0019] Fig. 3 is a cross-sectional view of the hair dryer 1 taken along 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 in which air sucked from the suction port 4 flows through the inside of the inner tube portion 5 toward the air outlet 3, and a first air passage 20C in which air flows between the outer circumferential surface 5a of the inner tube 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 circumferential surface of the inner tube portion 5. In short, the second air passage 20H and the first air passage 20C are separated by the cylindrical body of the inner tube portion 5, and the main body 2 and the inner tube portion 5 of the main body 2 form two air passages 20H and 20C in a double-pipe-like configuration.

[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 has a first blade 71, a first cylinder 73 enclosing the first blade 71, and a first motor 75 to drive 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 about the rotation axis. Accordingly, air outside the hair dryer 1 is drawn toward the inside of 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 described above.

[0022] Here, Fig. 4 is a diagram of the portion enclosed by a dotted line in Fig. 3, and is a diagram showing the suction port 4 as viewed from the front. For ease of explanation, Fig. 4 shows a state in which a filter separately attached to the suction port 4 has been removed. The filter will be described later. As shown in Fig. 4, the aperture of the suction port 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 cylinder 73. As a result, a gap is formed between the inner circumference of the suction port 4 and the first blower 7 (first cylinder 73). In this way, the space formed between the inner circumference of the suction port 4 and the first blower 7 (first cylinder 73) serves as a passage for air drawn from the outside of the hair dryer into the inside of the main body 2. Note that although this passage itself does not have a structure for drawing air, air is drawn from the passage at the same time that the first blower 7 draws air through the first cylinder 73 at the center side of the suction port 4.

[0024] In the example of Fig. 4, the first motor 75 has a first cylinder 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 cylinder 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 cylinder 73, the shape of the passage in front view does not have to be a continuous circular ring as shown in Fig. 4, and multiple arc-shaped passages may be lined up on the outer periphery of the square first cylinder 73.

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

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

[0027] The second blowing section 8 has a second blade 81, and the second blade 81 is wrapped in a second cylinder 83. The second blowing section 8 employs a motor (e.g., a brushless motor) capable of high-speed rotation, and has a straightening plate (not shown) on the outlet 3 side of the second blade 81. The second blowing section 8 has a second motor 85 that drives the second blade 81. The second motor 85 drives the second blade 81, so that the second blade 81 rotates about the rotation axis. As a result, air from the inner cylinder 5 and the suction port 4 (first blowing section 7) inside the main body 2 is drawn into the cylinder of the inner cylinder 5. The air drawn into the cylinder of the inner cylinder 5 becomes the wind flowing through the second air passage 20H described above. In addition, when passing through the second cylinder 83, the air is also drawn into the cylinder of the inner cylinder 5 through the second cylinder 83. The air drawn into the interior of inner cylinder 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 installation of the second motor 85.

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

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

[0031] The air heated to a predetermined temperature flows only inside the inner cylinder portion 5. That is, the heated air flows only through the 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, the first blower 7 installed near the suction port 4 of the main body 2 and the second blower 8 installed in the inner cylinder 5 will be further described. The first blower 7 and the second blower 8 both 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 a 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 is a diagram of the first blade and the second blade mounted on the hair dryer of Fig. 1. Each of the first blades 71 is made of resin, and each of the second blades 81 is made of metal. The rotation speed of the first blower section 7 is, for example, 7000 to 8000 rpm, and the rotation speed of the second blower section 8 is 75000 to 80000 rpm at maximum. The second blade of the second blower section 8 is made of metal because it rotates at a higher speed.

[0036] The second blower section 8 has a higher rotation speed of the blades than the first blower section 7. By increasing the rotation speed of the second blower section 8 in this manner, the air drawn into the inside of the main body 2 by the first blower section 7 can be efficiently guided into the cylinder of the inner tube section 5. Furthermore, the rotation speed is much faster than that of the first blower section 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 wind speed and improving the quick-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 (driving). When the power switch 13 is operated from ON to OFF, both the first motor 75 and the second motor 85 are turned OFF (driving stopped).

[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 able to switch between multiple levels of air volume. In one example, the second blower 8 can switch between five levels of air volume.

[0039] Even the minimum rotation speed for the airflow of the second motor 85 is set to be 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, each of the first blades 71 and each of the second blades 81 rotate in the same direction, so that a large volume of air can be blown out from the air outlet 3. As an example, when the nozzle 6 is not attached, the air outlet 3 can blow out a large volume of air at a distance of 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] Each of the first blades 71 and each of the second blades 81 may have the same shape or different shapes. Also, the number of blades may be different as shown in FIG. 5, or may be the same.

[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] Fig. 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 blowing portion of the air that has passed through inner cylinder 5, i.e., the outlet of second air passage 20H. Plate 55 has a mesh structure with a large area through which the air passes, and is structured to pass the air blowing out from the outlet of second air passage 20H without blocking it. Plate 55 may be fixed to inner cylinder 5.

[0046] The front grill 30 is disposed adjacent to the plate 55 on the Y-axis positive side of the plate 55. The front grill 30 may also be fixed to the inner cylinder 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 facing the outlet of first air passage 20C and second outlet 33H provided at a position facing the outlet of second air passage 20H.

[0048] As described above, first air passage 20C is configured in an annular shape along the outer periphery (5a) of inner cylinder portion 5 when viewed from air outlet 3. Therefore, in front grill 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 area through which air passes, similar to the plate 55. Furthermore, the first outlet 33C is formed in a shape divided into a plurality of sections, and the second outlet 33H is also formed in a shape divided into a plurality of 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 not limited to those shown in FIG. 6.

[0050] Furthermore, the front grill 30 has a wall portion 35 at the boundary between the first outlet 33C and the second outlet 33H, facing the outside of the main body 2. More specifically, the wall portion 35 has a shape that protrudes in the direction in which air blows out.

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

[0052] The wall portion has a groove 37 formed on a surface 35C on the first outlet 33C side. The surface 35C on the first outlet 33C side is the outer circumferential 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 along the outer circumferential surface of the cylindrical wall portion 35. Note that the groove portion 37 is not limited to being formed all around, 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 shows an example of the rotation direction of the outer nozzle 6a.

[0055] 7C is a diagram showing the outer nozzle 6a and the inner nozzle 6b combined together, as viewed from the wind blowing side of the nozzle 6. The outer nozzle 6a has wind blowing portions 6aa, 6ab at three locations.

[0056] 7D is a front view of the inner nozzle 6b as viewed from the base 61 side. The inner nozzle 6b has an opening 62 at its center. The wind 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] When the outer nozzle 6a is in a predetermined position relative to the inner nozzle 6b, the outer nozzle 6a can blow air over a wide area depending on how the air outlets 6aa, 6ab of the outer nozzle 6a overlap with the opening 62 of the inner nozzle 6b. Also, when the position of the outer nozzle 6a is rotated relative to the inner nozzle 6b, the outer nozzle 6a can blow air with a higher wind speed and stronger wind pressure over a narrower area than the previous area.

[0058] The inner nozzle 6b is fitted into the inner periphery 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. Since 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 so as to wrap around the outer periphery of the cylindrical wall 35, and the base 61 of the inner nozzle 6b has a protrusion 67 that engages with the groove 37 provided in the wall 35. The protrusions 67 are provided at two locations symmetrical with respect to the center of the base 61 (the center K shown imaginarily in FIG. 7D). Each of the protrusions 67 protrudes toward the center K. Each of the protrusions 67 protruding inward in this manner can engage with the groove 37 provided in the wall 35, and by engaging with the groove 37, the nozzle 6 is detachably attached to the air outlet 3 of the main body 2 via the front grill 30 in FIG. 6.

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

[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 wind blown out from the first outlet 33C is air that has passed through the first air passage 20C surrounded by the outer peripheral surface 5a of the inner cylinder and the inner surface 2a of the main body, and is not heated. Therefore, the unheated wind, in other words, the cold wind, blows out from the first outlet 33C and flows along the outer peripheral surface 6s of the nozzle 6. The flow of the wind is shown by arrows in FIG. 8. According to this embodiment, it is possible to prevent the nozzle 6 from being excessively heated. The wind blown out from the first outlet 33C flows between the outer peripheral surface 6s of the outer nozzle 6a and the front cover 12 installed on the air outlet 3 side of the main body 2 shown in FIG. 1 and FIG. 3.

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

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

[0065] FIG. 9 shows the hair dryer 1 as seen from the air outlet 3 side (A of FIG. 9) as in B of FIG. 1, and a perspective view (B of FIG. 9) of the state in which the main body and the inner cylinder part are removed. As shown in A of FIG. 9, an ion generating part 9 that generates negative ions is provided in the center part of the air outlet 3. As shown in B of FIG. 9, the ion generating part 9 has a plurality of needle electrodes 91 at the tip part of the insulating substrate 51 having the heating part 52 on the air outlet 3 side. That is, the ion generating part 9 is provided 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 part 52 and are released to the outside from the air outlet 3 on the wind passing through the second air passage 20H.

[0066] As described above, according to the configuration of this embodiment, It 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, it is possible to achieve a large air volume while reducing the volume ratio of the main body 2 by 40% and the weight by 20% compared to conventional products.

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

[0068] [Additional Note 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] [Additional Note 2] According to the first aspect of the present invention Hair dryerThe air conditioner includes a main body having an air inlet and an air outlet, and a cylindrical inner cylinder portion disposed inside the main body. Inside the main body, a second air passage through which air flows inside the inner cylinder portion toward the air outlet, and a first air passage through which air flows between an outer peripheral surface of the inner cylinder portion and an inner surface of the main body toward the air outlet are formed. The air conditioner includes a main body having an air inlet and an air outlet, and a second air passage through which air flows inside the inner cylinder portion toward the air outlet. A first blade and a first motor for driving the first blade. A first blowing unit is provided in the inner cylinder, and a blowing unit blows air into the inner cylinder. A second blade and a second motor for driving the second blade. A second blower and a heating unit that heats the air inside the cylinder are provided.

[0070] According to the configuration of the first aspect, not only can the second blower blow air into the inner cylinder, but the first blower installed in the intake port of the main body can also blow air to the outside of the inner cylinder (first air passage), increasing the amount of air from the outlet. This allows the dryer to dry quickly despite its small 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 an 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 aspect 2, air can be sucked in from the gap between the inner circumference of the suction port and the first blowing section, and the amount of air intake can be increased compared to the amount of air intake that can be achieved by 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 aspect 1 or aspect 2, a front grill is provided at the air outlet of the main body, and the front grill has 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 grill may be configured to 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 a surface on the first outlet side.

[0076] According to the configuration of the fourth aspect, the nozzle can be engaged by 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, and the nozzle having a protrusion that engages with the groove portion, and the nozzle may be 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 portion 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 a 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 grill, the outer peripheral surface of the nozzle may form an air path for air blowing out from the first outlet of the front grill.

[0082] According to the configuration of the seventh aspect, the outer circumferential 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 unlikely 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 circumferential surface of inner cylinder 6 Nozzles 6a Outer nozzle 6aa, 6ab, wind outlet 6b Inner nozzle 6s Nozzle outer surface 7 First Blower Section 8 Second blower section 9 Ion generating unit 11 Gripping part 12 Front cover 13 Power Switch 14 Airflow adjustment switch 20C First Airway 20H Second Airway 30 Front Grill 33C 1st Exit 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 The 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 is 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 hair dryer in which a first air blowing unit having a first blade that sends air into the inside of the main body and a first motor that drives the first blade is installed at the suction port of the main body, and a second air blowing unit having a second blade that sends air into the inside of the inner cylindrical portion and a second motor that drives the second blade, and a heating unit that heats the air in the cylindrical portion are installed in the inner cylindrical portion.

2. A hair dryer as described in claim 1, wherein the diameter of the suction port is larger than the outer diameter of the first air blowing section, and there is a gap between the inner circumference of the suction port and the first air blowing section.

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, 3. The hair dryer according to claim 2, wherein the front grill has a wall portion protruding outward from the main body at a boundary between the second outlet and the first outlet.

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

5. 5. The hair dryer 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 removably attached to the air outlet of the main body via the front grill by engaging the protrusion with the groove portion.

6. 2. The hair dryer according to claim 1, further comprising an insulating substrate extending along a central axis of the inner cylindrical portion to the air outlet, the insulating substrate further comprising an ion generating unit for generating negative ions disposed at a tip of the insulating substrate on the air outlet side.

7. 6. The hair dryer 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 passage for air blown out from the first outlet of the front grill.

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