JP3234751U - Circulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulator capable of efficiently heating air sucked from the outside. SOLUTION: A circulator 1 is a blade housing 21 including a rotating shaft 31 extending in the front-rear direction, an intake port 215 and an air outlet 216, and a plurality of blades fixed to the rotating shaft 31. A plurality of blades 32 that suck air from the outside of the housing 21 into the blade housing 21 from the intake port and send the sucked air from the air outlet 216 to the outside of the blade housing 21, and the blade housing 21 from the intake port 215. It is provided with a heating unit 4 that heats the air sucked into the inside of the above, and a rectifying unit 6 that rectifies the air sent from the plurality of blades 32 and supplies the air to the heating unit 4. The position of the heating portion 4 along the extending direction DN of the rotating shaft 31 is in front of the positions of the plurality of blades 32 along the extending direction DN of the rotating shaft 31. The heating unit 4 includes an insulating portion fixed to the blade housing 21 and a heat generating element wound around the insulating portion. [Selection diagram] Fig. 3

Description

The present invention relates to a circulator, and more specifically to a circulator provided with a heating unit.

Circulators are known as home appliances that circulate the air in the space in which they are installed. Circulators are used for purposes such as ventilating a room, improving the efficiency of cooling or heating, and promoting the drying of laundry.

The following Patent Document 1 discloses an electric stove that also serves as a fan that heats air sucked from the outside with a heater by rotating a plurality of blades around a rotation axis and blows the heated air to the outside. .. This electric stove that also serves as an electric fan includes a reflector placed on the front of the main body, a fan provided in the substantially central part of the reflector at a distance from the reflector, and a motor that rotationally drives the fan. It includes a heater provided near the outside of the fan and a control unit that controls forward and reverse rotation of the motor. This electric stove that also serves as a fan sucks in outside air from the central part and discharges it from the outside when the heater is energized, and sucks in outside air from the outside and discharges from the central part when shutting off the heater.

Japanese Unexamined Patent Publication No. 2013-209794

As a method of further promoting the drying of the laundry or a method of using the circulator itself as heating, a method of mounting a heating unit on the circulator can be considered. However, when the heating unit is mounted on the circulator, the air sucked from the outside cannot be efficiently heated by the heating unit, and the temperature of the blown air is low.

The present invention is for solving the above problems, and an object of the present invention is to provide a circulator capable of efficiently heating air sucked from the outside.

A circulator according to one aspect of the present invention is provided on a rotating shaft extending in the front-rear direction, an intake port provided on a rear surface in the extending direction of the rotating shaft, and a front surface in the extending direction of the rotating shaft. A housing including an provided air outlet and a plurality of blades fixed to a rotating shaft, and air outside the housing is sucked into the inside of the housing from the intake port, and the sucked air is sucked from the air outlet to the housing. It is equipped with a plurality of blades sent to the outside of the body, a heating unit that heats the air sucked into the housing from the intake port, and a rectifying unit that rectifies the air sent from the plurality of blades and supplies it to the heating unit. , The position of the heating part along the extending direction of the rotating shaft is in front of the positions of the plurality of blades along the extending direction of the rotating shaft, and the heating part is fixed to the housing and extends the rotating shaft. It includes an insulating portion that surrounds the circumference of the rotating shaft when viewed from the current direction, and a heat generating element wound around the insulating portion.

In the above circulator, preferably, the housing blocks the inflow of air outside the housing to the heating unit from a direction orthogonal to the extending direction of the rotation axis of the heating unit.

The circulator preferably includes a support portion that is fixed to the housing and supports the insulating portion.

In the above circulator, preferably, when viewed from the extending direction of the rotating shaft, the heat generating element has a longer portion existing on the outer diameter side than the insulating portion than a portion existing on the inner diameter side of the insulating portion. ..

In the above circulator, the position of the front end portion of the intake port along the extending direction of the rotating shaft is preferably located behind the position of the front end portion of the plurality of blades along the extending direction of the rotating shaft.

The circulator preferably includes a rectifying unit provided at a position on the front side of the positions of the plurality of blades along the extending direction of the rotation axis and at a position on the rear side of the heating unit, and the rectifying unit is provided. , A plurality of guard portions for colliding the air sent from the plurality of blades, and each of the plurality of guard portions has an arc shape when viewed from the extending direction of the rotation axis.

According to the present invention, it is possible to provide a circulator capable of efficiently heating the air sucked from the outside.

It is a front view which shows typically the structure of the circulator 1 in one Embodiment of this invention. It is a back view which shows typically the structure of the circulator 1 in one Embodiment of this invention. It is sectional drawing which shows the internal structure of the blade housing 21 and the like. It is sectional drawing which shows the internal structure of the blade housing 21 and the like. It is a front view which shows typically the structure of the heating part 4 and the support part 5. It is a front side perspective view which shows typically the structure of the heating part 4 and the support part 5. It is a side view which shows typically the structure of the heating part 4 and the support part 5. It is a front view which shows typically the structure of the rectifying part 6. It is a front side perspective view which shows typically the structure of the rectifying part 6. It is a figure which shows the relationship between the air which goes from the intake port 215 to the air outlet 216, and the heat generating elements 421 and 422 in one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the direction from the intake port 214 to the air intake port 216 along the extension direction DN of the rotating shaft 31 is forward, and the air intake port 216 to the intake port 214 along the extension direction DN of the rotation shaft 31. The direction toward is described later.

1 and 2 are diagrams schematically showing the configuration of the circulator 1 according to the embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a rear view.

With reference to FIGS. 1 and 2, the circulator 1 (an example of a circulator) includes a housing 2, a blower 3, a heating part 4 (an example of a heating part), and a support part 5 (an example of a support part). , A circulator 6 (an example of a rectifier) and a control unit 7 are provided. Inside the housing 2, a blower unit 3, a heating unit 4, a support unit 5, a rectifying unit 6, and a control unit 7 are provided.

The housing 2 includes a blade housing 21 (an example of the housing), a neck portion 22, and a stand 23. Inside the blade housing 21, a blower portion 3, a heating portion 4, a support portion 5, and a rectifying portion 6 are provided. The blade housing 21 can swing around the shaft AX1 with respect to the neck portion 22 as indicated by the arrow AR1. The blade housing 21 may be rotated around the shaft AX1 by the electric power supplied from the control unit 7 so as to be blown in an appropriate direction, or may be rotated around the shaft AX1 by the user of the circulator 1. You may.

The neck portion 22 is provided at the lower part of the blade housing 21. The neck portion 22 connects the stand 23 and the blade housing 21. The neck 22 extends upward from the stand 23. The blade housing 21 and the neck portion 22 can swing around the shaft AX2 with respect to the stand 23 as shown by the arrow AR2 by the electric power supplied from the control unit 7. The function of the blade housing 21 and the neck portion 22 swinging around the axis AX2 with respect to the stand 23 as indicated by the arrow AR2 is called a swing function.

The stand 23 is provided below the neck portion 22. The stand 23 houses the control unit 7. An operation unit 231 is provided on the side surface of the stand 23. The operation unit 231 accepts the operation of the user of the circulator 1. The operation unit 231 uses, for example, an operation of turning on and off the power of the circulator 1, an operation of adjusting the air volume, an operation of switching the operating state of the circulator 1 between the heating mode, the clothes drying mode, and the ventilation mode, and the power supply of the circulator 1. It accepts an operation of setting an on or on time, an operation of turning on or off the swing function of the blade housing 21, and the like.

The control unit 7 controls the operation of the entire circulator 1 based on the setting or operation received by the operation unit 231.

FIG. 3 is a cross-sectional view showing the internal configuration of the blade housing 21 and the like. FIG. 4 is a cross-sectional perspective view showing the internal configuration of the blade housing 21 and the like. 3 and 4 show a cross section along lines III-III of FIG.

With reference to FIGS. 1 to 4, the blade housing 21 includes an inner case 211, an outer case 212, a connection portion 213, an intake port 214, an intake port 215 (an example of an intake port), and an air outlet 216. (Example of air outlet) and is included.

The inner case 211 has a substantially cylindrical shape, and constitutes the space SP1 inside the blade housing 21.

The outer case 212 has a substantially cylindrical shape and covers the inner case 211 with a space SP2 in between. The outer case 212 is connected to the neck 22.

The connecting portion 213 connects the inner case 211 and the outer case 212. The outer case 212 fixes the inner case 211 via the connecting portion 213.

The intake port 214 is provided on the back surface of the inner case 211 (the rear surface of the rotating shaft 31 in the extending direction DN). The intake port 214 extends forward from the back surface of the inner case 211, and reaches a part of a side surface of the inner case 211 (a surface existing in a direction orthogonal to the extending direction DN of the rotation axis 31). .. The intake port 214 is composed of, for example, a plurality of holes having an arc shape.

The intake port 215 is provided on the back surface of the outer case 212 (the rear surface of the rotating shaft 31 in the extending direction DN). The intake port 215 extends forward from the back surface of the outer case 212, and reaches a part of the side surface of the outer case 212 (a surface existing in a direction orthogonal to the extending direction DN of the rotation axis 31). .. The intake port 215 is composed of, for example, a plurality of holes having an arc shape. The air outside the blade housing 21 passes through each of the intake ports 215 and 214 in this order and is supplied to the inside of the blade housing 21.

Each of the intake ports 214 and 215 may be provided only on the back surface of each of the inner case 211 and the outer case 212, and may not reach a part of each side surface of the inner case 211 and the outer case 212. good.

The air outlet 216 is provided on the front surface of the inner case 211 (the surface on the front side of the rotating shaft 31 in the extending direction DN). The air outlet 216 covers the opening on the front end side of the inner case 211. The air outlet 216 is composed of, for example, a plurality of holes having an arc shape.

The air outlet 216 is provided on the front surface of the inner case 211 (the surface on the front side of the rotating shaft 31 in the extending direction DN). The air outlet 216 covers the opening on the front end side of the inner case 211. The air outlet 216 is composed of, for example, a plurality of holes having an arc shape.

The intake port 214 or 215 may be detachably provided with a filter for preventing dust or the like in the air from entering the heating unit 4.

The blower portion 3 includes a rotating shaft 31 (an example of a rotating shaft), a plurality of blades 32 (an example of a plurality of blades), a motor 33, a female screw 34, and a sleeve 35. The rotation shaft 31 extends in the front-rear direction. The rear end of the rotating shaft 31 is fixed to the motor 33, and the rotating shaft 31 projects forward from the motor 33.

Each of the plurality of blades 32 is integrated with the sleeve 35 and is fixed to the rotating shaft 31. Each of the plurality of blades 32 extends from the sleeve 35 to the outer diameter side. The sleeve 35 is fixed to the rotating shaft 31, and the plurality of blades 32 and the sleeve 35 rotate together with the rotating shaft 31. The plurality of blades 32 suck the air outside the blade housing 21 into the inside of the blade housing 21 through the intake ports 214 and 215, and the sucked air is sucked into the blade housing from the air outlet 216 via the rectifying unit 6 and the heating unit 4. Send to the outside of the body 21. The arrow AR3 indicates the air flow due to the rotation of the plurality of blades 32.

When each of the intake ports 214 and 215 reaches a part of each side surface of the inner case 211 and the outer case 212, the front ends of the intake ports 214 and 215 along the extending direction DN of the rotating shaft 31. The position PO1 exists behind the position PO2 at the front end of the plurality of blades 32 along the extending direction DN of the rotation shaft 31. As a result, while increasing the areas of the intake ports 214 and 215, the inflow of air outside the blade housing 21 into the heating unit 4 from the direction orthogonal to the extending direction DN of the rotating shaft 31 (as indicated by the arrow AR4). The inflow of air) can be suppressed.

The motor 33 rotationally drives the rotary shaft 31 by the electric power supplied from the control unit 7.

The female screw 34 is fitted into the male screw formed at the tip of the rotating shaft 31 by a screwing action. The female screw 34 fixes the positions of the plurality of blades 32 and the sleeve 35 along the rotation shaft 31 by sandwiching the sleeve 35 with the motor 33.

The heating unit 4 heats the air sucked into the blade housing 21 through the intake ports 214 and 215. The position of the heating unit 4 is in front of the positions of the plurality of blades 32 and the sleeve 35 along the extending direction DN of the rotating shaft 31.

The support portion 5 is fixed to the blade housing 21 through the rectifying portion 6. The support portion 5 supports the heating portion 4.

The rectifying unit 6 rectifies the air sent from the plurality of blades 32 and sends it to the heating unit 4. The rectifying unit 6 has a substantially circular shape when viewed from the extending direction DN of the rotating shaft 31, and its outer peripheral end is fixed to the inner case 211. The rectifying unit 6 is located at a position in front of the position PO2 of the front end of the plurality of blades 32 along the extending direction DN of the rotating shaft 31, and at a position rearward of the position PO3 of the rear end of the heating unit 4. It is provided. The rectifying unit 6 divides the space SP1 inside the blade housing 21 into a space provided with a plurality of blades 32 and a space provided with the heating unit 4. The rectifying unit 6 includes a plurality of holes having an arc shape, for example, as holes for passing air.

The control unit 7 may control the operating state of the circulator 1 according to the set mode as follows.

The heating mode is a mode in which a small amount of air having a relatively high temperature is blown. When the operating state of the circulator 1 is set to the heating mode, the control unit 7 sets the rotation speed of the plurality of blades 32 to the first speed (low speed), thereby reducing the amount of air blown by the blower unit 3 to a small amount. Control. The control unit 7 heats the heating unit 4 by supplying electric power to the heating unit 4. As a result, a relatively small amount of air is blown from the air outlet 216 at a relatively high temperature.

The clothes drying mode is a mode in which a large amount of air at a relatively low temperature is blown. When the operating state of the circulator 1 is set to the clothes drying mode, the control unit 7 blows air by setting the rotation speed of the plurality of blades 32 to a second speed (high speed) faster than the first speed. A large amount of air is controlled in the unit 3. The control unit 7 heats the heating unit 4 by supplying electric power to the heating unit 4. In the case of the clothes drying mode, as a result, a relatively large amount of air is blown from the air outlet 216 at a relatively low temperature (higher than room temperature).

The blowing mode is a mode in which air at room temperature is blown. When the operating state of the circulator 1 is set to the blowing mode, the control unit 7 controls the blowing amount of the blowing unit 3 to the set amount. The control unit 7 stops the supply of electric power to the heating unit 4. As a result, the air at room temperature sucked from the intake port 215 is blown as it is from the air outlet 216.

5 to 7 are diagrams schematically showing the configurations of the heating unit 4 and the support unit 5. 5 is a front view, FIG. 6 is a perspective view of the front side, and FIG. 7 is a side view. Note that in FIGS. 5 and 6, the illustration of each portion of the heat generating elements 421 and 422 existing on the inner diameter side of the insulating portions 411 and 412 is omitted.

With reference to FIGS. 3 to 7, the heating unit 4 includes the insulating parts 411 and 412 (an example of the first and second insulating parts) and the heat generating elements 421 and 422 (an example of the first and second heat generating elements). ) And is included.

Each of the insulating portions 411 and 412 is made of an insulator, is supported by the supporting portion 5, and is fixed to the blade housing 21 via the supporting portion 5. Each of the insulating portions 411 and 412 holds each of the heat generating elements 421 and 422 in a state of being insulated from the housing 2. Each of the insulating portions 411 and 412 has, for example, an annular shape when viewed from the extending direction DN of the rotating shaft 31, and surrounds the circumference of the rotating shaft 31. The insulating portion 412 surrounds the rotating shaft 31 at a position rearward from the position of the insulating portion 411 along the extending direction DN of the rotating shaft 31. The extending direction of each of the insulating portions 411 and 412 is orthogonal to the extending direction DN of the rotating shaft 31.

Each of the heat generating elements 421 and 421 is a conducting wire, and is spirally wound around each of the insulating portions 411 and 412. A current flows through each of the heat generating elements 421 and 422 by the electric power supplied by the control unit 7. As a result, each of the heat generating elements 421 and 422 generates heat and heats the air inside the blade housing 21. Each of the heating elements 421 and 422 is made of, for example, a nichrome wire. The heat generating element 421 is fixed to the insulating portion 411 by sandwiching the insulating portion 411 from the front-rear direction at the fixing position 423. The heat generating element 422 is fixed to the insulating portion 412 by sandwiching the insulating portion 412 from the front-rear direction at the fixing position 424.

When viewed from the extending direction DN of the rotating shaft 31, each of the fixed positions 423 and 424 is provided on the inner diameter side of each of the heat generating elements 421 and 422 with respect to the central portion in the radial direction. In other words, the heat generating elements 421 and 422 existing on the outer diameter side of the insulating portions 411 and 421 with respect to the respective parts of the heat generating elements 421 and 422 existing on the inner diameter side of each of the insulating portions 411 and 412. Each part is longer. As a result, each of the heat generating elements 421 and 422 protrudes into the space on the outer diameter side of each of the insulating portions 411 and 412, so that most of the air from the intake port 214 to the air outlet 216 passes through the heat generating elements 421 and 422. Will come to do. As a result, the air can be efficiently heated inside the blade housing 21.

As shown in FIG. 3, the outer diameter side end portion of the heating portion 4 (the end portion in the direction orthogonal to the extending direction DN of the rotating shaft 31) is covered by the inner case 211 and the outer case 212. ing. No holes are formed in the inner case 211 and the outer case 212 that cover the outer diameter side end of the heating portion 4. As a result, the inflow of air outside the blade housing 21 (inflow of air as indicated by the arrow AR4) into the heating unit 4 from the direction orthogonal to the extending direction DN of the rotating shaft 31 is the inner case 211 and the outer case. It is blocked by 212.

The support portion 5 includes a rear portion 51, an arm portion 52, and an anterior portion 53. The rear portion 51 has a plate shape and is fixed to the rectifying portion 6 by using a screw (not shown) or the like. In this way, the support portion 5 is fixed to the blade housing 21 through the rectifying portion 6. The rear portion 51 is located on the rear side of the heating portion 4. When viewed from the extending direction DN of the rotating shaft 31, the rear portion 51 has, for example, a hexagonal shape.

There are six arms 52 here. Each of the six arms 52 projects forward from the rear 51. Each of the six arm portions 52 projects parallel to the extending direction DN of the rotation shaft 31. Each of the six arm portions 52 supports each of the insulating portions 411 and 412 from the inner diameter side of each of the insulating portions 411 and 412.

The front portion 53 has an annular shape when viewed from the front and is connected to the front end of each of the six arm portions 52.

8 and 9 are diagrams schematically showing the configuration of the rectifying unit 6. FIG. 8 is a front view, and FIG. 9 is a perspective view of the front side.

With reference to FIGS. 3, 4, 8, and 9, the rectifying section 6 includes an inner diameter section 61, a plurality of guard sections 62 (an example of a plurality of guard sections), and an outer diameter section 63. There is. The inner diameter portion 61 is provided at a position where it overlaps with the rotating shaft 31 when viewed from the front. The rear portion 51 of the support portion 5 is fixed to the inner diameter portion 61.

Each of the plurality of guard portions 62 extends radially from the inner diameter portion 61, and connects the inner diameter portion 61 and the outer diameter portion 63. Each of the plurality of guard portions 62 has an arc shape when viewed from the extending direction DN of the rotating shaft 31, and the distance between the adjacent guard portions 62 increases as the distance from the inner diameter portion 61 increases. Each of the plurality of guard portions 62 serves to collide the air sent from the plurality of blades 32, and forms a plurality of holes 64 for passing the air.

The outer diameter portion 63 has an annular shape and surrounds the outer circumference of the inner diameter portion 61. The outer diameter portion 63 constitutes the outer diameter side end portion of the rectifying portion 6, and is fixed to the blade housing 21.

Since the air sent from the plurality of blades 32 is rotating, it is likely to diffuse in the outer diameter direction (direction away from the position of the rotation shaft 31 when viewed from the front) due to centrifugal force. By providing the rectifying unit 6 including a plurality of guard portions 62 having an arc shape when viewed from the extending direction DN of the rotating shaft 31, the air sent from the plurality of blades 32 collides with each of the guard portions 62. , It stays in a swirling shape near the position of the rotating shaft 31 when viewed from the front. Diffusion of air sent from the plurality of blades 32 in the outer diameter direction is suppressed. As a result, the air sent from the plurality of blades 32 to the heating unit 4 is concentrated near the center (near the rotation shaft 31 when viewed from the front), easily passes through the heating unit 4, and the air sucked from the outside is efficiently sucked. Can be heated.

[Effect of Embodiment]

FIG. 10 is a diagram showing the relationship between the air from the intake port 215 to the air outlet 216 and the heat generating elements 421 and 422 in one embodiment of the present invention.

With reference to FIG. 10, in the present embodiment, as shown by the arrow AR3, the air outside the blade housing 21 passes through the intake ports 215 and 214 of the blade housing 21 due to the rotation of the plurality of blades 32. It is sucked into the inside, passes through the plurality of blades 32, the rectifying unit 6, and the heating unit 4 in this order, and is sent from the air outlet 216 to the outside of the blade housing 21. The air sent from the plurality of blades 32 is rectified when passing through the rectifying unit 6, and is heated when passing through the heating unit 4. The heated air is immediately sent from the air outlet 216 to the outside of the blade housing 21. As a result, it is possible to avoid a situation in which the heat of the high-temperature air after passing through the heating unit 4 is taken away by the plurality of blades 32, and the air sucked from the outside can be efficiently heated.

In addition, in the present embodiment, each of the two heat generating elements 421 and 422 arranged in the extending direction of the rotating shaft 31 is wound around each of the insulating portions 411 and 412 surrounding the circumference of the rotating shaft 31. ing. As a result, most of the air from the intake port 215 to the air outlet 216 (air flowing in the direction indicated by the arrow AR3) passes through the four heat generating elements 422a, 422b, 421a, and 421b in this order. As a result, the air sucked from the outside can be efficiently heated.

[others]

The heating portion may include only one insulating portion fixed to the housing and surrounding the circumference of the rotating shaft, and only one heat generating element wound around the insulating portion. The rectifying unit may be omitted.

The embodiments and modifications described above should be considered exemplary and not restrictive in all respects. The scope of the present invention is indicated not by the above description but by the scope of the utility model registration claims, and is intended to include all changes within the meaning and scope equivalent to the scope of the utility model registration claims.

1 Circulator (an example of a circulator)
2 Housing 3 Blower 4 Heating unit (example of heating unit)
5 Support part (an example of support part)
6 Rectifier (example of rectifier)
7 Control unit 21 Blade housing (example of housing)
22 The neck of the housing 23 The stand of the housing 31 The rotating shaft of the blower (an example of the rotating shaft)
32 Blower blades (an example of multiple blades)
33 Blower motor 34 Blower female screw 35 Blower sleeve 51 Support rear 52 Support arm 53 Support front 61 Rectifier inner diameter 62 Rectifier guard (multiple guards One case)
63 Outer diameter part of the rectifying part 64 Hole of the rectifying part 211 Inner case of the blade housing 212 Outer case of the blade housing 213 Connection part of the blade housing 214,215 Intake port of the blade housing (an example of the intake port)
216 Blower (an example of a blower)
231 Stand operation part 411,412 Insulation part of heating part (example of first and second insulation part)
421, 422, 421a, 421b, 422a, 422b Heat-generating element of heating unit (example of first and second heat-generating elements)
423,424 Fixed position of heat generating element SP1, SP2 Space

Claims (6)

It ’s a circulator,
A rotation axis that extends in the front-back direction,
A housing including an intake port provided on the rear surface of the rotating shaft in the extending direction and an air outlet provided on the front surface of the rotating shaft in the extending direction.
A plurality of blades fixed to the rotating shaft, in which air outside the housing is sucked into the inside of the housing from the intake port, and the sucked air is sent from the air outlet to the outside of the housing. Feathers and
A heating unit that heats the air sucked into the housing from the intake port, and
A rectifying unit that rectifies the air sent from the plurality of blades and supplies the air to the heating unit is provided.
The position of the heating portion along the extending direction of the rotating shaft is in front of the positions of the plurality of blades along the extending direction of the rotating shaft.
The heating part is
An insulating portion fixed to the housing and surrounding the circumference of the rotating shaft when viewed from the extending direction of the rotating shaft.
A circulator including a heat generating element wound around the insulating portion. The circulator according to claim 1, wherein the housing blocks the inflow of air outside the housing to the heating unit from a direction orthogonal to the extending direction of the rotation axis of the heating unit. The circulator according to claim 1 or 2, further comprising a support portion fixed to the housing and supporting the insulating portion. When viewed from the extending direction of the rotating shaft, the portion of the heat generating element located on the outer diameter side of the insulating portion is longer than the portion existing on the inner diameter side of the insulating portion. Item 4. The circulator according to any one of Items 1 to 3. Claims 1 to 1 that the position of the front end portion of the intake port along the extending direction of the rotating shaft exists behind the position of the front end portion of the plurality of blades along the extending direction of the rotating shaft. The circulator according to any one of 4. A rectifying unit provided at a position on the front side of the position of the plurality of blades along the extending direction of the rotation axis and at a position on the rear side of the heating unit is further provided.
The rectifying unit includes a plurality of guard units for colliding air sent from the plurality of blades.
The circulator according to any one of claims 1 to 5, wherein each of the plurality of guard portions has an arc shape when viewed from the extending direction of the rotation axis.

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