Hot air blower

Abstract

To realize a hot air blower in which a case hardly reaches a high temperature.SOLUTION: A head hair dryer (1) comprises: a first body (10) in which a wind passage (12) extending in a first direction (15) is formed; and a second body (20) comprising an internal space (22) connected to the downstream side of the wind passage, and discharge ports (21) provided outside an extension region (16) that is a virtual region obtained by extending the wind passage in the internal space. The second body includes a wall part (26) located in the extension region, and against which wind having flowed into the internal space from the wind passage hits. The wall part includes an inner wall part (26a) on the side of the internal space, and an outer wall part (26b) separated from the inner wall part.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a hot air blower. [Background technology]

[0002] Hair dryers that include a fan and a heater and blow hot air onto hair to dry it are widely used. For example, Patent Document 1 discloses a hair dryer in which a fan, a heater, and an air outlet are arranged in a straight line. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-47415 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, in order to improve the operability of hair dryers, hair dryers have been proposed that house a motor and / or heater in a grip that the user holds with his / her hand and have a compact head. In this type of hair dryer, the fan, heater, and air outlet are not aligned in a straight line, so it is necessary to change the direction of the hot air by blowing it against the wall inside the housing, and the housing is prone to becoming hot.

[0005] An object of one aspect of the present invention is to provide a hot air blower whose housing is unlikely to become too hot. [Means for solving the problem]

[0006] In order to solve the above problems, the hot air blower of the present invention comprises a first housing in which an air passage extending in a first direction is formed, and a second housing having an internal space connected to the downstream side of the air passage, and an outlet provided outside an extended area which is a virtual area obtained by extending the air passage in the internal space, the second housing being located in the extended area and including a wall portion which is hit by air flowing from the air passage into the internal space, the wall portion including an inner wall portion on the internal space side and an outer wall portion spaced apart from the inner wall portion.

[0007] In order to solve the above problems, the hot air blower of the present invention comprises a housing in which an air passage extending in a first direction is formed, and an electric blower housed in the air passage, the air passage having an outlet on its downstream side that opens toward a second direction different from the first direction, the housing including a wall portion at the downstream end of the air passage that guides air to the outlet, and the wall portion including an inner wall portion on the air passage side and an outer wall portion spaced apart from the inner wall portion. Effect of the Invention

[0008] According to one aspect of the present invention, a hot air blower whose housing is unlikely to become too hot is realized. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view showing the appearance of a hair dryer according to an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view of the hair dryer shown in FIG. 1 along the line AA. [Diagram 3] 2 is a block diagram showing the configuration of the main parts of the hair dryer; FIG. [Figure 4] FIG. 4 is a front view showing details of the blowing portion. [Diagram 5] 3 is a cross-sectional view of the second main body taken along line BB in FIG. 2. [Figure 6] 3 is a cross-sectional view of the second main body taken along line CC in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Embodiment] (hair dryer) In the present disclosure, a hair dryer whose housing does not easily become hot is realized, but first, the hair dryer in the present disclosure will be described. In the present disclosure, the term "hair dryer" refers to any device capable of drying hair with gas. Therefore, the hair dryer also includes a device capable of drying other objects (e.g., pet hair) in addition to hair, and a hot air blower that can be used for purposes other than drying hair.

[0011] The hair dryer includes, for example, a device capable of drying hair and blowing gas onto the skin to care for the skin. The temperature of the gas supplied by the hair dryer is not particularly limited. For example, the hair dryer may be capable of supplying at least hot air out of hot air and cold air.

[0012] Here, "cold air" is not defined by an absolute temperature, but refers to air supplied without substantially heating the gas supplied by a heating means such as a heater. In contrast, "hot air" refers to air supplied by heating the gas supplied by a heating means such as a heater.

[0013] The type of gas is not particularly limited. Examples of preferred gases include air, nitrogen, oxygen, argon, and carbon dioxide. These gases are preferably gases in the temperature range in which the hair dryer is used.

[0014] (Overview of Hair Dryer 1) An embodiment of the present invention will be described in detail below. Fig. 1 is a front view showing the appearance of a hair dryer 1 according to this embodiment. Fig. 2 is a cross-sectional view of the hair dryer 1 taken along line AA in Fig. 1.

[0015] As shown in Fig. 1, the hair dryer (hot air blower) 1 includes a first body (first housing) 10 having a substantially cylindrical shape that is held by a user, and a second body (second housing) 20 having a substantially cylindrical shape connected to one end of the first body 10. The shape of the first body 10 is not limited to a substantially cylindrical shape, and may be a polygonal columnar shape as long as it is columnar, and the corners of the polygonal columnar shape may be rounded. Similarly, the shape of the second body 20 is not limited to a substantially cylindrical shape, and may be a polygonal columnar shape as long as it is columnar, and the corners of the polygonal columnar shape may be rounded.

[0016] In the drawings, the direction in which the first main body 10 extends is indicated as the Z direction, the direction perpendicular to the Z direction is indicated as the X direction, and the direction perpendicular to the X and Z directions is indicated as the Y direction.

[0017] The first main body 10 has a shape extending in one direction (Z direction in the figure) and has a gripping part 14 that is gripped by a user. The first main body 10 is provided with an operation part 60 composed of a plurality of switches. In addition, the second main body is connected to one end of the first main body 10, and a power cable 80 is connected to the other end.

[0018] An air intake 13 is disposed between the power cable 80 and the grip portion 14 in the first main body 10. The cross-sectional shape of the air intake 13 may be, for example, elongated or dot-shaped.

[0019] The second body 20 has a shape extending in a direction (Y direction in the figure) substantially perpendicular to the direction in which the first body 10 extends, and one end of the second body 20 is closed. On the other hand, a blowing section 25 is disposed at the other end of the second body 20. The blowing section 25 is provided with a plurality of blowing ports 21. Gas passes from the intake port 13 through the first body 10 and the second body 20 to the blowing section 25. The blowing section 25 is also provided with a distance sensor 23 that measures the distance to the object to be dried.

[0020] The distance sensor 23 may be, for example, of a TOF (Time Of Flight) type, and may have a light emitting section and a light receiving section made of semiconductor lasers. However, the distance sensor 23 is not limited to a TOF type, and may be of another type. The distance sensor 23 measures the distance from the position where the distance sensor 23 is provided to an object (at least a part of the human body (e.g., the scalp, hair, etc.) or a member) that exists in front of the distance sensor 23. When the hair is dried by the hair dryer 1, the distance sensor 23 measures the distance to the hair. Note that the distance sensor 23 does not necessarily have to be provided.

[0021] As shown in Fig. 2, the hair dryer 1 is provided therein with at least one ion generating unit 24 for supplying ions to the gas to be blown, and a cylindrical member 40. The ion generating unit 24 is provided on the rear side of the blowing section 25, and has an electrode 24A protruding toward a hollow portion (internal space 22 described below) inside the second main body 20. The second main body 20 has a hole 27 used for cleaning the electrode 24A of the ion generating unit 24 in a region facing the electrode 24A of the ion generating unit 24 (see Fig. 5).

[0022] In addition, reference numeral 22 in FIG. 2 indicates the schematic shape of the internal space by a dashed line, and the cross-sectional view of FIG. 2 shows the schematic overall shape of the internal space including a space portion that is not actually shown.

[0023] The ion generating unit 24 is a unit that generates ions. The ion generating unit 24 may generate at least one of negative ions and positive ions, or may generate both. For example, the ion generating unit 24 may include, as the electrode 24A, a needle-shaped discharge electrode and a ring-shaped induction electrode that surrounds the periphery of the discharge electrode. In this case, a voltage is applied between the discharge electrode and the induction electrode to generate a corona discharge, and H + Positive ions such as (HO)m and O 2-It is also possible to generate both positive and negative ions such as (H2O)n. The generated positive ions and negative ions are released together with the air blown out from the air outlet 21. Note that the ion generating unit 24 is not essential and may not be provided.

[0024] The ion generating unit 24 according to one embodiment of the present invention is an example of a charged particle supply (generation) mechanism. The charged particle supply (generation) mechanism is a mechanism that supplies (generates) charged particles.

[0025] The term "charged particles" refers to particles that are not electrically neutral, or active species that have been activated to a non-electrically neutral state. Charged particles are not limited to particles that have an electric charge, and include, for example, particles such as atoms and molecules that have no electric charge but have unpaired electrons. Specifically, charged particles include, for example, ions with positive or negative charges, complexes of ions with positive or negative charges, radicals, electrons, protons, and the like.

[0026] The charged particle supply (generation) mechanism may be, for example, a mechanism that supplies (generates) only one type of charged particle, or may be a mechanism that supplies (generates) multiple types of charged particles. The charged particle supply (generation) mechanism may be, for example, a mechanism that supplies (generates) both positive ions or complexes of positive ions (for example, complexes in which positive ions are coordinated with polar molecules such as water molecules) and negative ions or complexes of negative ions (for example, complexes in which negative ions are coordinated with polar molecules such as water molecules). The charged particle supply (generation) mechanism may be, for example, a mechanism that supplies (generates) only one of the complexes of positive ions and negative ions.

[0027] The cylindrical member 40 is a cylindrical member that communicates from the air passage 12 of the first main body 10 to the internal space 22 of the second main body 20. The cylindrical member 40 is formed of a flame-retardant material. The heater 41 is accommodated in the cylindrical member 40. A cylindrical sheet (not shown) is provided between the cylindrical member 40 and the heater 41, and the cylindrical sheet is formed using flame-retardant mica as a main material. In this embodiment, the cylindrical member 40, the heater 41, and the cylindrical sheet have approximately the same length in the first direction 15 (Z direction). It is preferable that the cylindrical member 40 and the cylindrical sheet are longer than the heater 41. In addition, more than half of the total length (total length) of the cylindrical member 40 and the heater 41 in the first direction 15 is located in the internal space 22. The tip of the cylindrical member 40 and the heater 41 on the internal space 22 side is located above the midpoint of the internal space 22 in the Z direction.

[0028] An area inside first main body 10 is referred to as air passage 12. Air passage 12 may be formed from the position of fan 11 (electric blower) housed in first main body 10, or may be formed from air intake port 13. Air passage 12 is formed by extending in first direction (Z direction) 15. In addition, a space formed inside second main body 20 is referred to as internal space 22. Internal space 22 is connected to the downstream side of air passage 12.

[0029] The cylindrical member 40 is housed in a partition wall portion 28 (see Figs. 5 and 6) formed in the second main body 20. The partition wall portion 28 is formed in the second main body 20 to match the outer shape of the cylindrical member 40. That is, the partition wall portion 28 has a generally cylindrical shape with openings at both ends. That is, the heater 41 is located in the air passage 12 and the internal space 22 via the cylindrical member 40. As a result, the partition wall portion 28 is provided around the heater 41 in the second main body 20 so as to extend the air passage 12. Due to the presence of the cylindrical member 40, the wind passes through the inside of the cylindrical member 40, and therefore the wind can be blown without leaking from the joint between the first main body 10 and the second main body 20.

[0030] In the hair dryer 1, air is sucked in through the air intake 13, blown by the fan 11, passes through the air passage 12, and is heated by the heater 41, and then hot or cold air is blown out from the air outlet 21 to the items to be dried. A substrate is disposed inside the first body 10 between the fan 11 and the air intake 13, and the substrate is cooled by the air flow generated by the rotation of the fan 11.

[0031] FIG. 3 is a block diagram showing the configuration of the main parts of the hair dryer 1. The operation unit 60 includes an ON / OFF switch 61, a one-shot cold air switch 62, a mode change switch 63, and an air volume change switch 64. When the ON / OFF switch 61 is turned on, power from the power cable 80 is supplied to each part of the hair dryer 1. When the ON / OFF switch 61 is turned off, power supply to each part of the hair dryer 1 is stopped. In addition, the one-shot cold air switch 62 transmits a signal notifying the control unit 50 that the switch has been operated every time the switch is operated. The control unit 50 alternately controls the heater 41 to be on / off every time the control unit 50 receives a signal from the one-shot cold air switch 62. Note that the control unit 50 may alternately connect and cut off the power from the power cable 80 to the heater 41 every time the one-shot cold air switch 62 is pressed, without going through the control unit 50. The mode change switch 63 and the air volume change switch 64 transmit a signal notifying the control unit 50 that the switch has been operated every time the switch is operated. The control unit 50 controls the rotation speed of the fan 11, the heat output of the heater 41, and the on / off of the ion generating unit 24 in response to signals from the mode change switch 63 and the air volume change switch 64. Each switch may be, for example, a button. That is, the control unit 50 controls each part of the hair dryer 1 in an integrated manner.

[0032] (Blowout section 25) FIG. 4 is a front view showing the details of the blowing section 25. The blowing section 25 is provided at a downstream end facing the internal space 22, where the wind flowing through the air passage 12 blows out. The blowing section 25 is provided with three or more blowing outlets 21, which communicate with the internal space 22. Specifically, in this embodiment, four blowing outlets 21 are provided. The centroids of the respective blowing outlets 21 on the plane on which the blowing section 25 is arranged are represented by centroids P1 to P4. Also, a quadrangle formed by connecting the centroids P1 to P4 with straight lines is a square, and the centroid of the square is represented by centroid C. The plane on which the blowing section 25 is arranged is perpendicular to the flow direction of the gas in the blowing section 25. Also, the region of the blowing section 25 where no blowing outlet 21 exists is a closed region from which gas is not blown out.

[0033] Moreover, the air outlet 21 opens toward a second direction 21a (Y direction) different from the first direction 15. The angle between the first direction 15 and the second direction 21a may be 90°, but is not limited to this. Therefore, the wind flowing through the air passage 12 in the first direction needs to be bent toward the second direction. The structure for this purpose will be described below.

[0034] (Structure of internal space 22) Fig. 5 is a cross-sectional view taken along line BB of the second body 20 in Fig. 2. Fig. 6 is a cross-sectional view taken along line CC of the second body 20 in Fig. 2. The second body 20 has an internal space 22, which is a hollow portion. The internal space 22 includes a curved surface with a gentle curvature change. This is to allow the flow of air to change smoothly. As a result, air can be blown with little pressure loss.

[0035] Air outlet 21 is provided outside extension area 16, which is a virtual area in internal space 22 to which air passage 12 is extended.

[0036] The second main body 20 includes a wall portion 26 located in an extension region 16 located on an extension of the air passage 12. The wall portion 26 is hit by the wind that flows from the air passage 12 into the internal space 22, and includes an inner wall portion 26a and an outer wall portion 26b. It is not necessary for all the wind that flows from the air passage 12 into the internal space 22 to hit the wall portion 26, and the wall portion 26 guides the wind that does not hit the wall portion 26 along the wall portion 26. The inner wall portion 26a is a wall that faces the internal space 22. The outer wall portion 26b is a wall that is spaced away from the inner wall portion 26a toward the outside of the second main body 20.

[0037] The inner wall portion 26a has an inclined portion 26e inclined in a third direction 26d at an angle different from the first direction 15. That is, the inner wall portion 26a has an inclined portion 26e inclined at an angle with respect to the first direction 15. The angle θ formed between the first direction 15 and the third direction 26d is an acute angle (θ<90°).

[0038] The inner wall portion 26a has an inclined portion 26e (first inclined portion) located on one side of a plane 43 passing through the flow path center of the air passage 12, and an inclined portion 26e (second inclined portion) located on the other side. The plane 43 is a YZ plane passing through the flow path center of the air passage 12, and may be a plane on which the air outlet 21 is disposed symmetrically with respect to the plane 43. In addition, the inner wall portion 26a has a ridge portion 26g formed on a ridge line where the two inclined portions 26e intersect. That is, the inclined portion 26e (first inclined portion) located on one side and the inclined portion 26e (second inclined portion) located on the other side form the ridge portion 26g protruding toward the air passage 12 side. The distance between the tip of the heater 41 on the internal space 22 side in the first direction 15 and the ridge portion 26g is shorter than the distance between the tip and the joint between the first main body 10 and the second main body 20. Therefore, the hot air passing through air passage 12 hits inner wall portion 26a forming ridge portion 26g without dissipating much heat.

[0039] Therefore, the wind flowing through air passage 12 is split by ridge 26g and guided along inclined portion 26e of inner wall portion 26a in third direction 26d, which is the two directions on the left and right sides of ridge 26g. As a result, the wind can be guided in a desired direction so as to follow internal space 22. In addition, since the angle between first direction 15 and third direction 26d is an acute angle, the wind flowing through air passage 12 is not sharply turned in direction, but can be turned in direction gently. Therefore, the wind can be guided with low pressure loss, and highly efficient air blowing can be achieved.

[0040] Furthermore, the wind guided by the inclined portion 26e passes through the internal space 22 and is blown out from the air outlet 21. The internal space 22 faces a curved surface that is convex toward the outside. In other words, the internal space 22 has a shape in which a tapered tube with a closed tip is rolled into a semicircular ring shape. The air outlet 21 is an opening that opens toward the front side of the internal space 22.

[0041] Therefore, the internal space 22 can gently bend and guide the wind, and the wind can be supplied with low pressure loss to all of the air outlets 21 formed on the front surface of the second main body 20. In other words, the inner surface of the internal space 22 is formed to change gently on a curved surface, and the wind in the first direction 15 can be bent into the third direction 26d and the second direction 21a with low pressure loss.

[0042] (Inner housing piece 29a and outer housing piece 29b) The second main body 20 includes an inner housing piece 29a and an outer housing piece 29b. The inner housing piece 29a is a member that forms the internal space 22 and includes the wall portion 26. It is preferable to use a resin with high heat resistance (a flame-retardant resin) as the inner housing piece 29a. The outer housing piece 29b is a member that is provided on the outside of the inner housing piece 29a and constitutes the outer surface of the second main body 20. It is preferable to use an inexpensive resin that is easy to decorate as the outer housing piece 29b, but this is not limited to this. For example, the outer housing piece 29b may be made of a resin with high heat resistance like the inner housing piece 29a, or an expensive resin that is easy to decorate, or a resin other than these may be used.

[0043] Furthermore, the inner housing piece 29a is connected to the inclined portion 26e and includes a curved surface that is curved convexly toward the outside of the internal space 22.

[0044] (Space 26c) A space 26c may be formed between the inner wall portion 26a and the outer wall portion 26b. The space 26c may not be hollow, but may be filled with a heat insulating material, or may have a boss or the like used for assembling the second main body 20. In consideration of heat insulation, it is preferable not to provide a boss or the like, but if a boss or the like is provided in the space 26c, it is preferable that the boss or the like is spaced apart from the inner wall portion 26a on which the inclined portion 26e is formed. Alternatively, the boss or the like may be configured to be spaced apart from the outer wall portion 26b.

[0045] The space 26c forms an insulating space in the wall 26. The wind blown by the fan 11 and warmed by the heater 41 passes through the air passage 12 and hits the wall 26. Since the space 26c, which is an insulating space, is formed in the wall 26, the heat of the warm air is less likely to be transmitted to the top of the outer housing piece 29b in the extension region 16 located on the extension of the air passage 12 (the part of the outer housing piece 29b that contacts the wall 26), and the top of the head can be prevented from becoming hot. This reduces the possibility that the user will feel hot when touching the top of the head. In other words, the housing of the hair dryer 1 is less likely to become hot.

[0046] In addition, through holes 26f may be formed to communicate space 26c with the outside. Through holes 26f communicate space 26c with the outside air, and heat exchange occurs, resulting in temperature equilibrium, and heating in space 26c can be reduced. As a result, heating of the top of the head can also be reduced. Although through holes 26f are illustrated in FIG. 5, if through holes 26f are not provided, through holes 26f are eliminated, and a hair dryer with excellent design can be realized.

[0047] In addition, when the hair dryer 1 is viewed from above, the area occupied by the space 26c is preferably larger than the area occupied by the air passage 12. This is because if there is space 26c for an area that is directly exposed to the hot air sent from the air passage 12 and heated, it is easy to ensure insulation.

[0048] (Hair dryer 1 assembly process) The steps for assembling the hair dryer 1 will now be described. 1: The second main body 20 is assembled by inserting the inner housing piece 29a into the outer housing piece 29b. 2: An opening communicating with the partition wall 28 of the assembled second main body 20 is formed in the outer housing piece 29b on the opposite side of the ridge 26g in the Z direction of the second main body 20, and the tubular member 40, into which the heater 41 and the tubular sheet are inserted, is inserted. When the insertion of the tubular member 40 is completed, a part of the tubular member 40 protrudes outside the second main body 20. 3: The cylindrical member 40 protruding outside the second body 20 is inserted into the first body 10. In this manner, the hair dryer 1 is assembled.

[0049] The outer housing piece 29b may have a shape having a protruding portion that covers the portion of the tubular member 40 that has been completely inserted and that protrudes outside the second body 20. In this case, the protruding portion of the outer housing piece 29b that covers the tubular member 40 that protrudes outside the second body 20 is inserted into the first body 10.

[0050] In addition, instead of inserting the tubular member 40 protruding outside the second body 20 into the first body 10, the first body 10 may be assembled so as to cover the tubular member 40 protruding outside the second body 20.

[0051] Also, instead of inserting the protruding portion of outer housing piece 29b into first main body 10, a structure in which first main body 10 is assembled so as to cover the protruding portion of outer housing piece 29b may be used.

[0052] [Modifications] (Angle θ between first direction 15 and third direction 26d) In the embodiment, the angle θ between the first direction 15 and the third direction 26d is an acute angle, but the present invention is not limited to this. That is, the angle θ may be an obtuse angle (180°>θ>90°). Even in this case, the wind flowing through the air passage 12 is guided in the direction of the inclined portion 26e (third direction 26d). In this case, the ridge portion 26g is not formed by the two inclined portions 26e, and instead, a valley portion recessed toward the air passage 12 side is formed.

[0053] In this case, the space 26c becomes thinnest at the portion where the pair of inclined portions 26e intersect. Instead, the volume of the space 26c can be made larger than that of the embodiment.

[0054] (Shape of the internal space 22) Internal space 22 is not limited to a shape symmetrical about the center of air passage 12. For example, internal space 22 may be formed as a flow passage that rotates in one direction in an annular shape from air passage 12.

[0055] (Space between inner housing piece 29a and outer housing piece 29b) A space may be provided between the inner housing piece 29a and the outer housing piece 29b. In this case, the space functions as a space having a heat insulating function. A through hole may be opened in the space to take in outside air. Furthermore, the outer wall portion 26b of the wall portion 26 may not be provided, and in this case, the outer housing piece 29b substantially plays the same role as the outer wall portion 26b.

[0056] [Modifications] In the embodiment, the hair dryer 1 is disclosed in which the second body 20 is provided for the first body 10, but the present modification is directed to a hair dryer formed only with a single body (housing). The body has, for example, a cylindrical shape extending in the first direction, which is the longitudinal direction, but is not limited to a cylindrical shape and may have a polygonal tubular shape.

[0057] An opening is formed as an air intake port in a portion of one end of the main body. The other end of the main body is closed. The main body has an air passage oriented in the longitudinal direction. The air passage may be formed from the position of a fan (electric blower) housed in the main body, or may be formed from the air intake port. The air intake port is provided upstream of the fan.

[0058] The air passage has an outlet that opens toward a second direction different from the first direction downstream of the fan. The main body includes a wall portion at the downstream end of the air passage, which guides the air to the outlet. The air flowing along the wall surface that constitutes the circumferential surface of the air passage passes through the fan, the wall portion, and the outlet in this order. The wall portion may be a wall surface that covers the air passage and is gently curved from the first direction to the second direction. The wall portion may be a flat surface that is perpendicular to the first direction. In this case, the wall portion blocks the air that has traveled in the first direction, and the air comes out from the second direction. The air flowing along the air passage wall surface may be changed in direction from the first direction to the second direction by hitting the wall portion. Similarly, the air flowing through the air passage is changed in direction from the first direction to the second direction so as to follow the shape of the wall portion. The wall portion includes an inner wall portion on the air passage side and an outer wall portion spaced apart from the inner wall portion. That is, a wall portion is formed at the other end of the main body on the side where the intake port is not formed.

[0059] As described above, even in a hair dryer having a single cylindrical main body, by providing a wall portion including an inner wall portion and an outer wall portion spaced apart from the inner wall portion on the other end side of the main body, it is possible to reduce the heat felt by the user when touching the other end. In addition, since the hair dryer according to this modification does not have the head in the above-mentioned embodiment, it is possible to easily move the hair dryer and easily dry hair.

[0060] The shape of the air outlet may be vertically long or circular. In other words, the shape of the air outlet is not particularly limited. The number of air outlets may be one or more (for example, two to four).

[0061] 〔summary〕 The hot air blower according to aspect 1 of the present invention comprises a first housing having an air passage extending in a first direction, an internal space connected to the downstream side of the air passage, and a second housing having an outlet provided outside an extended area, which is a virtual area formed by extending the air passage in the internal space, the second housing being located in the extended area and including a wall portion that is hit by air flowing from the air passage into the internal space, the wall portion including an inner wall portion on the internal space side and an outer wall portion spaced apart from the inner wall portion.

[0062] According to the above configuration, the wind passing through the air passage hits the wall of the second housing. Even if the wind is hot, the wall has a double structure of an inner wall and an outer wall spaced apart from the inner wall, so that a heat insulating effect is obtained. Therefore, the outside of the second housing corresponding to the wall is unlikely to become hot.

[0063] A hot air blower according to a second aspect of the present invention may be configured in the above-mentioned first aspect such that the air outlet opens in a second direction different from the first direction.

[0064] According to the above configuration, since the first direction and the second direction are different, it is necessary to guide the hot air that has passed through the air passage so that it flows in different directions.

[0065] A hot air blower according to a third aspect of the present invention may be configured in such a way that, in the above-mentioned first or second aspect, the second housing comprises an inner housing piece including the wall portion that forms the internal space, and an outer housing piece that is provided outside the inner housing piece and forms the outer surface of the second housing.

[0066] According to the above configuration, only the inner housing piece that contacts the internal space that becomes hot is made of a material with high heat resistance, and the outer housing piece that becomes colder than the inner housing piece is made of a material with low heat resistance. Therefore, in addition to reducing costs, a material that is easy to decorate can be used for the outer housing piece, and a hot air blower with excellent design can be realized.

[0067] A hot air blower according to a fourth aspect of the present invention is any one of the first to third aspects, wherein the inner wall portion has an inclined portion that is inclined at an angle with respect to the first direction.

[0068] According to the above-mentioned configuration, the inclined portion of the inner wall portion guides the wind flowing through the air passage in the direction of the inclined portion, so that the wind can be guided in a desired direction.

[0069] A hot air blower according to a fifth aspect of the present invention may be configured in such a way that, in the above-mentioned fourth aspect, the inclined portion includes a first inclined portion located on one side of a plane passing through the flow path center of the air passage, and a second inclined portion located on the other side.

[0070] According to the above configuration, since there are two inclined portions in different directions, the wind flowing through the air passage can be split into two directions and blown therein.

[0071] A hot air blower according to a sixth aspect of the present invention may be configured in accordance with the fifth aspect, wherein the first inclined portion and the second inclined portion form a ridge that protrudes towards the air passage.

[0072] According to the above configuration, the ridges split the wind flowing through the air passage and guide it along the two inclined sections. In addition, because the section formed between the two inclined sections is the ridge, the wind flowing through the air passage is not abruptly redirected, but can be gently redirected. Therefore, the wind can be guided with low pressure loss, and highly efficient airflow can be achieved.

[0073] A hot air blower according to a seventh aspect of the present invention may be configured in any one of the first to sixth aspects above, so that the second housing is connected to the inclined portion and includes a curved surface that is convexly curved toward the outside of the internal space.

[0074] According to the above configuration, the internal space is formed into a curved surface that is curved outwardly in a convex shape, so that the wind flowing gently through the internal space can be curved and guided, and thus the wind can be easily guided to the multiple air outlets.

[0075] A hot air blower according to aspect 8 of the present invention is any one of aspects 1 to 7 above, wherein the wall portion has a through hole that connects the space formed by the inner wall portion and the outer wall portion with the outside.

[0076] According to the above-mentioned configuration, the space in the wall portion communicates with the outside of the hot air blower through the through hole, so that the air in the space exchanges heat with the low-temperature air outside. Therefore, it is possible to suppress a temperature rise in the space, and high insulation performance is exhibited.

[0077] A hot air blower according to a ninth aspect of the present invention comprises a housing having an air passage formed therein extending in a first direction, and an electric blower housed in the air passage, the air passage having an outlet on its downstream side that opens toward a second direction different from the first direction, the housing including a wall portion at the downstream end of the air passage that guides air to the outlet, the wall portion including an inner wall portion on the air passage side and an outer wall portion spaced apart from the inner wall portion.

[0078] According to the above-mentioned configuration, wind hits the wall of the housing. Even if the wind is hot, the wall has a double structure of an inner wall and an outer wall spaced apart from the inner wall, so that a heat insulating effect is obtained. Therefore, the outside of the housing corresponding to the wall is unlikely to become hot.

[0079] [Additional Notes] The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the embodiment. Furthermore, new technical features can be formed by combining the technical means disclosed in the embodiment. [Explanation of symbols]

[0080] 1 Hair dryer (hot air blower) 10 First main body (first housing) 11 Fan (electric blower) 12 Wind path 15 1st direction 16 Extension area (area) 20 Second main body (second housing) 21 Air outlet 21a 2nd direction 22 Interior Space 26 Wall 26a Inner wall 26b Exterior wall 26c space 26d 3rd direction 26e Slope section 26g Minebe 28 Bulkhead 29a Inner housing piece 29b Outer housing piece 40 Cylindrical member 41 Heater

Claims

1. A first housing having an air passage extending in a first direction; a second housing having an internal space connected to a downstream side of the air passage and an air outlet provided outside an extended area that is a virtual area obtained by extending the air passage in the internal space, the second housing is located in the extension area and includes a wall portion that is hit by the wind that has flowed into the internal space from the air passage; The wall portion includes an inner wall portion on the interior space side and an outer wall portion spaced apart from the inner wall portion.

2. The hot air blower according to claim 1 , wherein the air outlet is open in a second direction different from the first direction.

3. 3. The hot air blower according to claim 2, wherein the second housing comprises an inner housing piece including the wall portion that forms the internal space, and an outer housing piece that is provided outside the inner housing piece and constitutes an outer surface of the second housing.

4. The hot air blower according to claim 1 , wherein the inner wall portion has an inclined portion that is inclined at an angle with respect to the first direction.

5. 5. The hot air blower according to claim 4, wherein the inclined portion includes a first inclined portion located on one side of a plane passing through a flow path center of the air passage, and a second inclined portion located on the other side.

6. The hot air blower according to claim 5 , wherein the first inclined portion and the second inclined portion form a ridge that protrudes toward the air passage.

7. The hot air blower according to claim 6 , wherein the second housing includes a curved surface that is connected to the inclined portion and that is curved convexly toward an outside of the internal space.

8. The hot air blower according to claim 1 or 2, wherein the wall portion has a through hole that communicates a space defined by the inner wall portion and the outer wall portion with the outside.

9. The hot air blower according to claim 1 , wherein the second housing comprises an inner housing piece including the wall portion that forms the internal space, and an outer housing piece that is provided outside the inner housing piece and constitutes an outer surface of the second housing.

10. The hot air blower according to claim 4 , wherein the second housing includes a curved surface that is connected to the inclined portion and that is curved convexly toward an outside of the internal space.

11. A housing having an air passage extending in a first direction; an electric blower accommodated in the air passage; The air passage has an air outlet on a downstream side thereof that opens toward a second direction different from the first direction, the housing includes a wall portion at a downstream end of the air passage that guides air to the air outlet, The wall portion includes an inner wall portion on the air passage side and an outer wall portion spaced apart from the inner wall portion.

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