JP2016214570A - Air blowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air blowing device that can restrain a temperature rise of a case.SOLUTION: In an air blowing device 1, an air blower 2 and a heater 4 are arranged inside a housing (case) 10 including an air suction port 10a and a discharge port 10b. Air sucked from the suction port 10a by the operation of the air blower 2 is heated by the heater 4, and the heated air is discharged from the discharge port 10b. In addition, the air blowing device 1 is provided with a return air passage that returns air introduced from an introduction port 53 provided upstream of the heater 4, to the side of the suction port 10a along an inner surface of the housing 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a blower that heats air sucked from a suction port of a housing and blows out the heated air from a blowout port of the housing.

An air blower for blowing warm air to dry human hair, a so-called dryer, is widely used (see, for example, Patent Document 1).
The air blower described in Patent Literature 1 includes a cylindrical housing (housing), and an air suction port and a blowout port are provided on each end surface of the housing. A blower and a heater are disposed in the housing. The blower and the heater are sequentially arranged from the suction port side toward the blowout port side.

  By the operation of the blower, air is sucked into the housing from the suction port, and air is blown out from the blowout port. The heater heats the air sucked into the housing by the operation of the blower. Thereby, the heated air is blown out from the blowout opening. Further, air is sucked into the housing through the net. The net body functions as a filter and prevents foreign matters such as hair and dust from entering the housing.

Japanese Patent No. 4410309

  The heater has, for example, a heating wire, and heats the air by supplying electric power to the heating wire to generate heat. The heating wire of the heater exchanges heat with the air sucked into the housing by the operation of the blower. Thereby, air is heated.

  In the air blower as described in Patent Document 1, when foreign matter adheres to the net body, the amount of air flowing through the heating wire of the heater is insufficient, and the amount of heat exchanged by the heating wire of the heater Decreases. At this time, since the heating value of the heating wire per unit time is maintained, the temperature of the heater rises.

  When the temperature of the heater rises, heat is transferred from the heater to the housing, and the temperature of the housing also rises. The housing can be touched by the user. For this reason, in the air blower described in Patent Document 1, it is necessary to suppress the temperature rise of the housing.

  This invention is made | formed in view of such a situation, The place made into the objective is to provide the air blower which can suppress the temperature rise of a housing | casing.

  The blower according to the present invention includes a blower and a heater in a housing having an air suction port and a blowout port, and the air sucked from the suction port by the operation of the blower is heated by the heater to form the blowout port. The air blower that blows out from the heater has an inlet on the upstream side of the heater, and includes a return air passage that returns the air introduced from the inlet to the inlet side along the inner surface of the housing. It is characterized by that.

  The blower device according to the present invention includes an ion generator for generating ions in the housing, and the return air passage further includes a second introduction port opened downstream of the ion generator. Features.

  The blower according to the present invention comprises a cover plate having an opening through which air sucked from the suction port passes upstream of the blower, and the outlet of the return air passage is located upstream of the cover plate. It is characterized by being established.

  The blower according to the present invention includes a filter on the upstream side of the blower through which air sucked from the suction port passes, and the outlet of the return air passage is opened on the upstream side of the filter. It is characterized by that.

  The blower device according to the present invention is characterized in that the return air passage extends from the introduction port to the blowout port side and is folded back to the suction port side.

  The blower according to the present invention is characterized in that the casing has a cylindrical shape, is provided in the casing, and includes a cylindrical body that forms the return air passage between the casing and the casing.

  The blower device according to the present invention includes an insertion portion provided at a peripheral portion of the suction port, and an insertion member that is partially inserted into the insertion portion and can support the housing. Features.

  According to the present invention, the temperature rise of the housing can be suppressed.

1 is an external view of a blower device according to Embodiment 1. FIG. It is a fragmentary sectional view of an air blower. It is explanatory drawing of the positional relationship of three cylinders. It is an external view of the air blower seen from the suction inlet side. It is a perspective view which shows a part of air blower. It is explanatory drawing of accommodation of an air blower. It is explanatory drawing of the usage example of an air blower. It is a fragmentary sectional view of the air blower in Embodiment 2. FIG. 6 is a partial cross-sectional view of a blower device according to Embodiment 3. It is a perspective view which shows a part of air blower in Embodiment 4. It is explanatory drawing of the usage example of the air blower in Embodiment 5. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is an external view of the air blower in the first embodiment. The blower 1 is a dryer having a cylindrical housing 10. One end of a rod-like grip 11 is connected to the outside of the peripheral surface of the housing 10 by a hinge. Since the hinge is used, the posture of the grip 11 can be changed to a posture rising with respect to the housing 10 or a posture along the housing 10 (see FIG. 6).

  A power cord 12 is connected to the grip 11. The connection portion of the power cord 12 is covered with a cord bush 13. The connection part between the housing 10 and the grip 11, and the grip 11 are each provided with a push button type operation changeover switch 14 and a slide type operation / stop switch 15 used by the user to operate the blower 1. It has been.

  FIG. 2 is a partial cross-sectional view of the blower 1. FIG. 2 shows the inside of the housing 10. The housing 10 is provided with an air suction port 10a that opens to substantially the entire surface of one side end portion, and an air outlet 10b that opens to the center portion of the other side end portion. Further, for the purpose of preventing hand insertion from the suction port 10a into the housing 10, the suction port 10a is covered with a cover plate 16 having a plurality of openings 16a, 16a,. Further, the outlet 10 b of the housing 10 is covered with a net body 17. The net 17 prevents foreign matter such as hair and dust from entering the housing 10 from the outlet 10b.

In the housing 10, the blower 2, the ion generator 3, and the heater 4 are arranged in this order from the suction port 10a side to the blowout port 10b side.
The blower 2 includes a motor 21 and an impeller 22 that is rotationally driven by the motor 21. The rotational axis of the impeller 22 is along the axis of the housing 10. The operation / stop switch 15 indicates an operation when it is slid to the housing 10 side, and indicates a stop when the operation / stop switch 15 is slid to the cord bush 13 side.

  The blower 2, that is, the motor 21, operates when the operation / stop switch indicates operation. By the operation of the blower 2, air is sucked into the housing 10 from the suction port 10a, and the sucked air flows through the housing 10 and is blown out from the blowout port 10b. The blower 2, that is, the motor 21, stops operation when the operation / stop switch indicates stop.

  Similar to the blower 2, the ion generator 3 operates when the operation / stop switch 15 indicates operation, and generates ions, specifically positive ions and negative ions. The ions generated by the ion generator 3 are contained in the air flowing through the housing 10 by the operation of the blower 2, and the air containing the ions is blown out from the outlet 10b. Charging is prevented at locations where ions are attached. For example, when air containing ions is blown onto the hair, for example, the ions adhere to the hair, preventing the generation of static electricity in the hair. Similar to the blower 2, the ion generator 3 stops the generation of ions when the operation / stop switch 15 indicates stop.

  The heater 4 has a plurality of heating wires. When the operation / stop switch 15 indicates the operation in the state in which the operation changeover switch 14 is on, power is supplied to the plurality of heating wires of the heater 4. As a result, the plurality of heating wires generate heat and exchange heat with the air flowing through the housing 10. By the heat exchange with the heater 4, the air sucked from the suction port 10a is heated, and warm air is blown from the blower port 10b. When the operation / stop switch 15 shows an operation in the state where the operation changeover switch 14 is off, the blower 2 is activated and the heater 4 is stopped, so that cold air is blown out from the outlet 10b.

The air blower 1 is characterized in that a return air passage is provided in the housing 10 for returning air from the outlet 10b side to the inlet 10a side. Hereinafter, this feature will be described.
Cylindrical bodies 50, 51 and 52 are arranged in the housing 10.

  FIG. 3 is an explanatory diagram of the positional relationship between the three cylinders 50, 51, 52. Each of the cylinders 50, 51, 52 has a cylindrical shape, and both end faces of each of the cylinders 50, 51, 52 are open. The cylinders 51 and 52 are coaxially arranged in the axial direction, and are arranged coaxially in the cylinder 50. The cylinder 50 covers the outer side over the entire length of each of the cylinders 51 and 52. The cylindrical body 51 has a larger diameter than the cylindrical body 52, and a gap in the axial length direction and the radial direction (introduction port 53) is formed between the cylindrical bodies 51 and 52.

  As shown in FIG. 2, the cylindrical body 50 is disposed coaxially in the housing 10. At this time, the cylinder 51 is located on the suction port 10a side, and the cylinder 52 is located on the outlet 10b side. The cylinder 50 has a larger diameter than the cylinders 51 and 52, and the housing 10 has a larger diameter than the cylinder 50. Thereby, an annular first air passage communicating with the introduction port 53 is formed between the cylinders 50 and 52, and an annular second air passage is formed between the housing 10 and the cylinder 50.

  A gap (introduction port 54) communicating with the first air passage is formed between the peripheral edge of the outlet 10b and the cylindrical body 52. A gap is also formed between the peripheral edge of the outlet 10b and the cylindrical body 50, so that the first air path and the second air path communicate with each other. Further, a gap (outlet port 55) communicating with the second air passage is formed between the peripheral edge of the suction port 10a and the cylinder 50.

  The blower 2 is supported by the cylinder 51, and the ion generator 3 and the heater 4 are supported by the cylinder 52. The open surface of the cylinder 50 facing the suction port 10 a of the housing 10 is covered with the net 18.

  In the blower device 1, the air is sucked into the housing 10 from the suction port 10 a through the plurality of openings 16 a, 16 a,. Further, the air sucked from the suction port 10a passes through the cylinders 51 and 52 in order through the mesh body 18, and the air that has flowed through the cylinder body 52 passes through the mesh body 18 and from the outlet port 10b. Be blown out. The ions generated by the ion generator 3 are included in the air flowing through the cylindrical body 52, and the heater 4 heats the air flowing through the cylindrical body 52. The net 18 functions as a filter and prevents foreign matter such as hair and dust from entering the housing 10.

  Due to the operation of the blower 2, a part of the air flowing in the cylinder 51 is introduced from the introduction port 53 into the first air passage formed between the cylinders 50 and 52, and blows out the first air passage. It flows toward the mouth 10b side. In addition, due to the operation of the blower 2, a part of the air flowing through the cylindrical body 52 is introduced into the first air passage from the introduction port 54, and merges with the air introduced from the introduction port 53 and flowing through the first air passage. The merged air flows through the second air passage formed between the housing 10 and the cylindrical body 50 from the blowout port 10b side to the suction port 10a side. In the second air path, air flows along the inner surface of the housing 10. The air flowing through the second air passage is led out from the outlet 55 and flows through the cylinder 51 through the net 18.

  As described above, the first air passage and the second air passage constitute a return air passage that returns the air introduced from the introduction port 53 to the suction port 10 a side along the inner surface of the housing 10. As can be seen from the above-described content, the inlet 53 of the return air passage is opened downstream of the blower 2 and upstream of the heater 4. A return air inlet 54 is provided downstream of the ion generator 3 and the heater 4. The net 18 is provided upstream of the blower 2. The outlet 55 for the return air passage is opened on the upstream side of the net 18. Further, the return air passage extends from the introduction port 53 toward the blowout port 10 b and is folded back toward the suction port 10 a in the vicinity of the blowout port 10 b in the housing 10.

  In the air blower 1 configured as described above, the air introduced from the introduction port 53 flows through the return air passage in a state where it is not heated by the heater 4, so that the user may come into contact with it. The temperature rise of the housing 10 is suppressed. Further, the return air path extends from the inlet 53 to the outlet 10b side, is folded back to the inlet 10a, and the non-heated air introduced from the inlet 53 contacts the entire peripheral surface of the housing 10. For this reason, the temperature rise of the wide area | region of the housing 10 is suppressed.

  Moreover, when the air blower 2 is operating, the ion generator 3 is also operating. For this reason, the air introduced into the return air passage from the inlet 54 contains ions generated by the ion generator 3. The air introduced from each of the introduction ports 53 and 54 flows through the second air passage formed by the housing 10 and the cylindrical body 50 toward the suction port 10 a and is led out from the outlet port 55. For this reason, the ions come into contact with peripheral members provided on the suction port 10 a side of the housing 10. Since the places where ions are attached are difficult to be charged, the number of foreign matters attached to the peripheral member on the suction port 10a side is small.

  The air led out from the outlet 55 hits the net 18. For this reason, ions adhere to the net body 18 and the number of foreign matters such as hair or dust adhering to the net body 18 is small. For this reason, the net 18 is not easily clogged, and the amount of air flowing through the housing 10 is sufficiently maintained. Thereby, the temperature rise of the heater 4 is suppressed.

  FIG. 4 is an external view of the blower 1 as viewed from the suction port 10a side. As described above, the suction port 10a of the housing 10 is covered with the cover plate 16 having a plurality of openings 16a, 16a,... For the purpose of preventing hand insertion into the housing 10. In the peripheral part of the cover plate 16, three insertion ports 16b, 16b, 16b are further provided outside the formation area of the plurality of openings 16a, 16a,. The two insertion openings 16 b and 16 b are arranged side by side in the direction perpendicular to the longitudinal direction of the grip 11 in a state of standing on the housing 10 on the grip 11 side of the cover plate 16. The other insertion port 16b is provided at a position farther from the grip 11 than the two insertion ports 16a described above.

FIG. 5 is a perspective view showing a part of the blower 1. A part of the three insertion members 60, 60, 60 is inserted into each of the three insertion ports 16a, 16a, 16a.
The insertion member 60 protrudes from the column body 60a, one end surface of the column body 60a, and protrudes from the other end surface of the column body 60a. And a columnar protrusion 60c. One of the protrusions 60b and 60c is inserted into the insertion port 16b. Thereby, the insertion member 60 is attached to the cover plate 16. The protrusion lengths of the protrusions 60b and 60c are different from each other.
FIG. 1 shows the insertion members 60, 60, 60 in which the protruding portions 60b are inserted into the insertion ports 16b, 16b, 16b, respectively.

  FIG. 6 is an explanatory diagram of the storage of the blower 1. The protrusions 60b of the insertion members 60, 60, 60 are inserted into the insertion ports 16b, 16b, 16b, and the posture of the grip 11 is changed to a posture along the housing 10. In this state, the blower 1 can be placed so that the end surfaces of the insertion members 60, 60, 60 face the mounting table P1. In this manner, the blower 1 can be accommodated in a narrow space by supporting the housing 10 on the insertion members 60, 60, 60. Similarly, when the protruding portions 60c of the insertion members 60, 60, 60 are inserted into the insertion ports 16b, 16b, 16b, the blower 1 can be similarly placed on the mounting table P1 and accommodated in a narrow space. be able to.

  FIG. 7 is an explanatory diagram of a usage example of the blower 1. In FIG. 7, the protrusions 60 b of the insertion members 60, 60 are inserted into the insertion ports 16 b, 16 b on the grip 11 side, and the posture of the grip 11 is changed to a posture rising with respect to the housing 10. In this state, the blower 1 can be placed on the mounting table P <b> 2 so that the insertion members 60, 60 and the grip 11 support the housing 10. When the air blower 1 is placed in this way, the axial direction of the housing 10 is inclined from the direction perpendicular to the mounting surface of the mounting table P2, and the user does not hold the grip 11 but mounts the mounting table P2. Air can be blown to the blower 1 at a fixed angle with respect to the placement surface.

  As described above, the protrusion length of the protrusion 60b is different from the protrusion length of the protrusion 60c. For this reason, a user changes the protrusion part of the insertion member 60 inserted in the insertion port 16b of the cover board 16, and places the air blower 1 on the mounting base P2 as shown in FIG. Can be changed.

  The insertion members 60, 60, 60 are preferably made of rubber. In this case, since the insertion members 60, 60, 60 also function as slip stoppers, when the blower 1 is placed on the mounting table P1 as shown in FIG. 6, the blower 1 is placed in a stable state. Further, the vibration of the housing 10 generated when the blower 1 is placed on the mounting table P2 as shown in FIG. 7 and the blower 1 is used is absorbed by the insertion members 60 and 60. For this reason, the sound produced by the vibration of the housing 10 is small.

  In addition, the number of each of the insertion port 60 and the insertion member 60 is not limited to 3, and may be 4 or more. Even when the number of the insertion ports 60 and the insertion members 60 is two, when the two insertion ports 60, 60 and the two insertion members 60, 60 on the grip 11 side are provided, the blower device 1 can be arranged as shown in FIG.

(Embodiment 2)
FIG. 8 is a partial cross-sectional view of the blower device 1 according to the second embodiment. FIG. 8 shows the inside of the housing 10 as in FIG.
In the following, the differences between the second embodiment and the first embodiment will be described. Since the other configuration except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

The blower 2 and the ion generator 3 are supported by the cylindrical body 51 with the ion generator 3 as the suction port 10a side. There is only the heater 4 in the cylindrical body 52. Moreover, the end surface of the cylindrical body 52 on the outlet 10b side is in contact with the peripheral edge of the outlet 10b.
The ion generator 3 is located on the upstream side of the blower 2, and the introduction port 53 is located on the downstream side of the blower 2 and the ion generator 3.

  In the air blower 1 configured as described above, when the operation / stop switch 15 indicates the operation, the air blower 2 and the ion generator 3 are activated, and the ion generator 3 is supplied to the air flowing through the cylindrical body 51. Is included. For this reason, the air introduced into the return air passage from the inlet 53 is not heated by the heater 4 and is also air containing ions. On the other hand, with respect to the air flowing through the cylindrical body 52, that is, the air heated by the heater 4, the entire amount is blown out from the outlet 10b and is not introduced into the return air passage. For this reason, the temperature rise of the housing 10 can be prevented more reliably.

(Embodiment 3)
FIG. 9 is a partial cross-sectional view of the blower device 1 according to the third embodiment. FIG. 9 shows the inside of the housing 10 as in FIG.
In the following, the differences between the third embodiment and the first embodiment will be described. Since the other configuration except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

  In the blower device 1 according to the third embodiment, the cover plate 16 covers not the suction port 10a of the housing 10 but the upstream open surface of the cylindrical body 50 from the suction port 10a side, and the return air passage outlet 55 is It is established on the upstream side of the cover plate 16.

  In the air blower 1 configured as described above, when the operation / stop switch 15 is activated, the air blower 2 and the ion generator 3 are activated, and the air sucked from the air inlet 10a is a plurality of openings of the cover plate 16. After passing through 16a, 16a,..., They pass through the net 18 in order into the cylinders 51, 52. The air flowing through the second air passage is led out from the outlet 55 and flows through the cylindrical body 51 through the openings 16a, 16a,.

  The air derived from the outlet 55 contains ions. For this reason, the ions adhere to the cover plate 16. As described above, since the portion to which ions are attached is difficult to be charged, the number of foreign matters such as hair or dust attached to the cover plate 16 is small.

  In the air blower 1 according to the second embodiment, as in the third embodiment, the cover plate 16 covers the open surface of the cylindrical body 50 covered with the net 18 from the suction port 10a side, and the outlet port. 55 may be established on the upstream side of the cover plate 16. Even in this case, since the air derived from the outlet 55 contains ions, the number of foreign matters adhering to the cover plate 16 is small.

  In the first, second, and third embodiments, the return air passage does not have to extend from the introduction port 53 to the blowout port 10b. The return air path may be an air path that returns the air introduced from the introduction port 53 to the suction port 10 a side along the inner surface of the housing 10. Even in this case, a temperature rise in a part of the housing 10 can be suppressed. Further, the outlet 55 for leading the air from the return air passage may be provided on the downstream side of the net 18.

(Embodiment 4)
FIG. 10 is a perspective view showing a part of the blower 1 in the fourth embodiment.
Hereinafter, the differences between the fourth embodiment and the first embodiment will be described. Since the other configuration except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

In the fourth embodiment, instead of the three insertion members 60, 60, 60, part of the two insertion members 70, 71 are inserted into the three insertion ports 16b, 16b, 16b.
The insertion member 70 includes a columnar body 70a and a columnar protruding portion 70b that protrudes from one end surface of the columnar body 70a and is substantially coaxial with the columnar body 70a. The other end surface of the columnar body 70a is substantially perpendicular to the axis of the columnar body 70a. The protrusion 70 b is inserted into the insertion port 16 b of the cover plate 16.

  The insertion member 71 has a rectangular parallelepiped base 71a and two protrusions 71b and 71b protruding from the same surface of the base 71a in a direction perpendicular to the one surface, and two protrusions 71b and 71b. Is substantially the same as the interval between the two insertion ports 16b, 16b provided on the grip 11 side of the cover plate 16. The protruding portions 71b and 71b are inserted into the insertion ports 16b and 16b provided on the grip 11 side in the cover plate 16, respectively. The length of the columnar body 70a in the axial direction is substantially the same as the distance between the one surface of the columnar body 71a where the protrusions 71b and 71b are provided and the one surface.

  Also in the fourth embodiment, as in the first embodiment, the blower 1 can be placed on the mounting table P1 in the state shown in FIG. In this case, not the three insertion members 60, 60, 60 but the insertion members 70, 71 support the housing 10. Also in this case, the blower 1 can be stored in a narrow space as in the first embodiment.

  Further, similarly to the first embodiment, the blower 1 can be placed on the mounting table P1 in the state shown in FIG. In this case, not the two insertion members 60 and 60 but the insertion member 71 supports the housing 10. At this time, since the insertion member 71 supports the housing 10 with the full length of the base 71a, the attitude | position of the air blower 1 is more stable. Even when the blower 1 is placed in this way, the axial direction of the housing 10 is inclined from the direction perpendicular to the mounting surface of the mounting table P2, and the user does not have the grip 11 and the user does not have the grip 11. Air can be blown to the blower 1 at a fixed angle with respect to the mounting surface.

  Moreover, it is preferable that the insertion members 70 and 71 are comprised with rubber | gum similarly to Embodiment 1. FIG. In this case, since the insertion members 70 and 71 also function as a slip stopper, when the blower 1 is placed on the mounting table P1 as shown in FIG. 6, the blower 1 is placed in a stable state. Further, the vibration of the housing 10 generated when the blower 1 is placed on the mounting table P2 as shown in FIG. For this reason, the sound produced by the vibration of the housing 10 is small.

In the fourth embodiment, the number of insertion members 70 is not limited to 1 and may be 2 or more. Moreover, the number of the protrusion parts 71b provided in the base 71a is not limited to 2, and may be 1 or 3 or more. In this case, the insertion port 16b according to the sum total of the number of the insertion members 70 and the number of the protrusion parts 71b provided in the base 71a is provided.
Moreover, in the air blower 1 in Embodiment 4, the structure in the housing 10 may be the same as that of the air blower 1 in Embodiment 2.

(Embodiment 5)
FIG. 11 is an explanatory diagram of a usage example of the blower 1 in the fifth embodiment.
In the following, the difference between the fifth embodiment and the first embodiment will be described. Since the other configuration except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

  On the peripheral surface of the grip 11 in the blower 1 in a state where the posture of the grip 11 is raised with respect to the housing 10, a block-like support leg 8 protruding in the same direction as the insertion members 60, 60, 60 is attached. . The support leg 8 is made of rubber.

  In the fifth embodiment, as in the first embodiment, as shown in FIG. 6, the blower 1 can be placed on the mounting table P1. In this case, the two insertion members 60 and 60 on the grip 11 side and the support leg 8 support the housing 10. Since the support leg 8 is made of rubber, the housing 10 is supported in a more stable state. Even when the blower 1 is placed in this way, the axial direction of the housing 10 is inclined from the direction perpendicular to the mounting surface of the mounting table P2, and the user does not have the grip 11 and the user does not have the grip 11. Air can be blown to the blower 1 at a fixed angle with respect to the mounting surface.

  In addition, in the air blower 1 in Embodiment 5, the structure in the housing 10 may be the same as that of the air blower 1 in Embodiment 2.

  In the first to fifth embodiments, the insertion port 16 b is provided on the cover plate 16 provided for the purpose of preventing the hand from being inserted into the housing 10. However, in the air blower 1 in which the net body 18 also functions as the cover plate 16, an insertion portion into which a part of the insertion member is inserted may be provided at the peripheral portion of the suction port 10a.

  In the first to fifth embodiments, the housings 10, 50, 51, and 52 are not limited to cylindrical shapes. Each of the housings 10, 50, 51, 52 may have a polygonal cross section, for example.

  The blower according to the present invention includes a blower (2) and a heater (4) in a housing (10) having an air suction port (10a) and a blowout port (10b), and the operation of the blower (2). In the blower (1), the air sucked from the suction port (10a) is heated by the heater (4) and blown from the blowout port (10b), and is introduced upstream of the heater (4). It has a mouth (53), and is provided with a return air passage which returns the air introduced from the inlet (53) to the inlet (10a) side along the inner surface of the case (10). To do.

  In the present invention, the blower (2) and the heater (4) are provided in the housing (10). The heater (4) heats the air sucked from the suction port (10a) by the operation of the blower (2). The air heated by the heater (4) is blown out from the blowout port (10b). In the return air passage, the air introduced from the introduction port (53) opened upstream from the heater (4) is returned to the suction port (10a) side along the inner surface of the housing (10). For this reason, since the air which is not heated with the heater (4) flows along the inner surface of a housing | casing (10), the temperature rise of a housing | casing (10) is suppressed.

  The blower according to the present invention includes an ion generator (3) for generating ions in the casing (10), and the return air passage is opened downstream of the ion generator (3). A second introduction port (53, 54) is further provided.

  In the present invention, the second introduction port (53, 54) of the return air passage is opened downstream of the ion generator (3) provided in the housing (10). For this reason, the air containing the ions generated by the ion generator (3) is introduced from the second introduction port (54) into the return air passage, flows through the return air passage, and the suction port ( Ions adhere to peripheral members provided on the 10a) side. Locations where ions are attached are difficult to charge. Therefore, the number of foreign matters adhering to the peripheral member on the suction port (10a) side is small.

  The blower according to the present invention includes a cover plate (16) having an opening (16a) through which air sucked from the suction port (10a) passes, on the upstream side of the blower (2), and the return air passage The outlet port (55) is provided on the upstream side of the cover plate (16).

  In the present invention, the air sucked from the suction port (10a) passes through the opening (16a) of the cover plate (16) provided on the upstream side of the blower (2). And the return port (55) of the return air path through which the air containing an ion flows is provided in the upstream of the cover board (16). For this reason, ions adhere to the cover plate (16), and the number of foreign substances attached to the cover plate (16) is small.

  The blower according to the present invention includes a filter (18) through which air sucked from the suction port (10a) passes upstream of the blower (2), and the outlet (55) of the return air passage. Is established upstream of the filter (18).

  In the present invention, the air sucked from the suction port (10a) passes through the filter (18) provided on the upstream side of the blower (2). The outlet (55) of the return air passage through which air containing ions flows is provided on the upstream side of the filter (18). For this reason, ions adhere to the filter (18), and the number of foreign matters such as hair or dust adhering to the filter (18) is small. For this reason, the filter (18) is not easily clogged, and the amount of air flowing through the housing (10) is sufficiently maintained. Thereby, the temperature rise of a heater (4) is suppressed.

  The blower according to the present invention is characterized in that the return air passage extends from the introduction port (53) toward the blowout port (10b) and is folded back toward the suction port (10a).

  In the present invention, the return air passage extends from the introduction port (53) to the blowout port (10b) side and is folded back to the suction port (10a) side, so that it is heated by the heater (4). The area of the housing (10) where there is no air contact is wide. For this reason, the temperature rise of the wide area | region of a housing | casing (10) is suppressed.

  In the blower according to the present invention, the casing (10) has a cylindrical shape, is disposed in the casing (10), and forms a return air passage between the casing (10) and the casing (10). (50).

  In this invention, the cylinder (50) is arrange | positioned in a cylindrical housing | casing (10), and the return air path is formed between the housing | casing (10) and the cylinder (50).

  The blower according to the present invention supports the casing (10) by inserting a part (16b) provided at a peripheral edge of the suction port (10a) and a part of the insertion part (16b). And an insertion member (60, 70, 71) that can be used.

  In this invention, a part of insertion member (60,70,71) is inserted in the insertion part (16b) provided in the peripheral part of the suction inlet (10a). The housing (10) can be supported by the insertion members (60, 70, 71). By supporting the housing (10) on the insertion members (60, 70, 71), for example, the device can be stored in a narrow space.

  The disclosed first to fifth embodiments are examples in all respects and should be considered not to be restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Blower 10a Inlet 10b Outlet 10 Housing (housing)
16 Cover plate 16b Insertion slot (insertion part)
18 Net (filter)
2 Blower 3 Ion generator 4 Heater 50 Tubular body 53 Inlet 54 Inlet (second inlet)
55 Outlet 60, 70, 71 Insertion member

Claims (7)

In the air blower that includes a blower and a heater in a housing having an air suction port and a blowout port, heats the air sucked from the suction port by the operation of the blower and blows out from the blowout port,
An air blower comprising an inlet on the upstream side of the heater, and a return air path for returning the air introduced from the inlet to the inlet along the inner surface of the housing. . An ion generator for generating ions is provided in the housing,
The blower according to claim 1, wherein the return air passage further includes a second introduction port opened downstream of the ion generator. A cover plate having an opening through which air sucked from the suction port passes is provided upstream of the blower,
The blower according to claim 2, wherein the outlet of the return air passage is opened on the upstream side of the cover plate. On the upstream side of the blower, a filter through which air sucked from the suction port passes,
The blower according to claim 2 or 3, wherein the outlet of the return air passage is opened on the upstream side of the filter. The blower according to any one of claims 1 to 4, wherein the return air passage extends from the introduction port to the blowout port side and is folded back to the suction port side. The housing has a cylindrical shape,
The blower according to any one of claims 1 to 5, further comprising a cylindrical body that is disposed in the housing and forms the return air passage between the housing and the housing. An insertion portion provided at a peripheral portion of the suction port;
The blower according to any one of claims 1 to 6, further comprising: an insertion member partially inserted into the insertion portion and capable of supporting the housing.

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