JP2826063B2 - Air fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply fan for supplying fresh outside air to a room.

[0002]

2. Description of the Related Art In recent years, houses have been made highly airtight in order to improve the cooling and heating effects and the soundproofing effect, and accordingly, the necessity of air supply has been regarded as important.

Conventionally, as shown in FIG. 3, this type of air supply fan is generally installed in an opening 102 provided in a room wall 101, and has a cylindrical air supply fan main body communicating the room 103 and the outside 104. An electric motor 107 to which an air supply blade 106 is fixed is provided inside 105. Further, a horn-shaped flange portion 109 extends outward along the chamber wall 101 around an end of the air supply fan main body 105 on the indoor 103 side. A main body frame 110 having a substantially rectangular cylindrical shape with an opening is integrally formed. In addition, the air supply fan body 10
5, the indoor side opening 1 of the main body frame 110
A grill 113 having a plurality of outlets 112 communicating with the indoor opening 111 is provided detachably.

In the above configuration, when the electric motor 107 is operated, fresh outside air of the outdoor 104 is sucked by the air supply blades 106, and the outdoor opening 114 of the air supply fan body 105.
Then, the air is drawn into the air supply fan main body 105, passes through the air supply fan main body 105 and the inside of the main body frame 110, and is supplied to the room 103 from the discharge port 112 of the grill 113.

[0005]

In such a conventional air supply fan, when a high temperature outside air is supplied to the room 103 cooled in the summer, the outside air is cooled by the indoor cooling. When passing through the inside of the frame 110, the main body frame 110
Is formed on the inner wall surface of the inside of the room, and the condensed water is dropped on the floor of the room 103 through the gap between the main body frame 110 and the grill 113 or through the outlet 112 of the grill 113. In the room 103 heated in winter,
When the outside air having a low temperature is continuously supplied, the temperature of the main body frame 110 is reduced by the outside air, and
However, there is a problem in that dew condensation occurs on the outer wall surface of the room and dew water is generated, and the dew water drops on a floor surface or the like and contaminates the room 103.

The present invention solves the above-mentioned problem. When the temperature difference between the outside air to be supplied and the room is large, dew condensation is generated on the inner wall surface or the outer wall surface of the main body frame and drops on the floor or the like. A first object is to provide an air supply fan that can prevent the interior of a room from being soiled.

A second object is to achieve the first object more reliably.

[0008]

The first means for achieving the first object of the present invention is provided on the indoor side of the room wall,
A box-shaped main body frame having a discharge port on the front side and an air supply port communicating to the outside of the room through an opening provided on the chamber wall on the rear side, and provided inside the main body frame, external air is supplied from the air supply port. A motor to which air supply blades for sucking into the inside of the main body frame and supplying air into the room through the discharge port are fixed, and a first portion which does not contact external air passing through the inside of the main body frame on a wall portion of the main body frame. This is a configuration of an air supply fan provided with a heat insulating space.

A second means for achieving the second object is to provide a cylindrical air guide tube portion which communicates with the air supply port, protruding into the inside of the main body frame. This is a configuration of an air supply fan provided with a second heat insulating space that does not come into contact with outside air passing through the air guide cylinder.

A third means for achieving the second object is that the air guide tube portion of the second means is formed in a double cylindrical shape comprising a large cylindrical portion and a small cylindrical portion, and A second heat insulating space is formed between the inner peripheral portion of the cylindrical portion and the outer peripheral portion of the small cylindrical portion, and the air supply fan has a configuration in which an electric motor is fixed inside the small cylindrical portion.

[0011]

According to the first aspect of the present invention, when outside air having a high temperature passes through the inside of the main body frame in summer, the outside air is interposed by the first heat insulating space, so that the outside air is cooled by indoor cooling. No longer makes direct contact with the
Also, when outside air having a low temperature passes through the inside of the body frame in winter, the outside air does not come into direct contact with the body frame, so that dew condensation is generated on the inner wall surface or the outer wall surface of the body frame. It can be prevented.

According to the structure of the second means, when the outside air passes through the inside of the main body frame, the outside air is supplied to the air guide tube provided in the air guide cylinder in addition to the first heat insulating space of the first means. Since the two heat insulating spaces are interposed, the generation of dew condensation on the inner wall surface or the outer wall surface of the main frame is further eliminated.

According to the third means, the electric motor is fixed inside the small cylindrical portion of the double cylindrical air guide tube, so that the fixing strength of the electric motor is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.

As shown in the drawing, a rear plate 4A of a box-shaped main body frame 4 which is installed on the wall of the room wall 1 on the side of the room 2 and has a front opening and a discharge port 3 is formed. An air supply port 7 communicating with the outdoor 6 through a pipe 5A provided in an opening 5 formed in the wall 1 is opened. Also, inside the main body frame 4,
External air is sucked into the main body frame 4 from the air supply port 7 and the discharge port 3
An electric motor 9 is provided to which an air supply blade 8 for supplying air to the room 2 is provided. The orifice 10 for guiding the air to the air supply blade 8 projects from the peripheral edge of the air supply port 7 into the inside of the main body frame 4. Has been established.

Further, inside the main body frame 4, a rectangular main body tube 11 is integrally formed from the outer peripheral end of the rear plate 4 A of the main body frame 4 along the upper, lower, left and right inner peripheral wall surfaces of the main body frame 4. The outside air to be supplied by integrally connecting the outer peripheral end of the main body cylinder 11 on the indoor side to the inner peripheral end near the discharge port 3 of the main body frame 4 through a closing flange 12. The first heat-insulating space 13 that does not come into contact with the main body frame 4 is formed in the upper, lower, left and right walls. On the indoor 2 side of the main body frame 4, a grill 15 covering the discharge port 3 and having a plurality of grill discharge ports 14 communicating with the discharge port 3 is provided detachably.

In the above configuration, when the electric motor 9 is operated, fresh outside air of the outdoor 6 is sucked by the air supply blade 8 and is sucked into the main body frame 4 from the air supply port 7 through the pipe 5A. , And is supplied into the room 2 from the discharge port 14 of the grill 15.

Even if high-temperature outside air is supplied to the room 2 cooled in summer, the first heat insulating space 13 is interposed between the ventilation path and the outer wall surface of the main body frame 4. Outside air
When passing through the inside of the main body frame 4, it does not directly touch the main body frame 4, does not cause dew condensation on the inner wall surface of the main body frame 4 cooled by the indoor cooling, and supplies low-temperature outside air to the room 2 heated in winter. Even if air supply is continued, when outside air passes through the inside of the main body frame 4, the temperature of the outer wall surface of the main body frame 4 is also unlikely to decrease, so that room air does not condense on the outer wall surface of the main body frame 4. Become.

As described above, according to the air supply fan of the first embodiment of the present invention, when the temperature difference between the outside air to be supplied and the room is large, dew water is generated on the inner wall surface or the outer wall surface of the main body frame 4. Thus, it is possible to prevent the room 2 from being soiled and dropped on the floor surface.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the drawing, this embodiment is different from the first embodiment in that a circular opening 16 formed in the rear plate 4A of the main body frame 4 extends from the periphery to the inside of the main body frame 4 and the discharge port. The cylindrical large cylindrical portion 17 extending to the third side and the inner peripheral end of the large cylindrical portion 17 are connected to the inner peripheral end of the large cylindrical portion 17 through the closed flange portion 18 through the closed flange portion 18. A double cylindrical air guide tube portion 20 including a small cylindrical portion 19 disposed inside is provided, and the small cylindrical portion 1 of the air guide tube portion 20 is provided.
9 is communicated with the indoor side opening of the pipe 5A, the air supply port 7 communicating with the outdoor 6 through the pipe 5A, the inner peripheral part of the large cylindrical part 17 and the outer peripheral part of the small cylindrical part 19 Is formed as a second heat insulating space 21 not in contact with the external air to be supplied, and the electric motor 9 is fixed inside the small cylindrical portion 19, and the capacitor 22 and the electric wire for the electric motor 9 are fixed. It is characterized in that an electric transmission component 25 such as a crimp terminal 24 connecting the components 23 is disposed below the air guide tube 20.

In the above configuration, when the electric motor 9 is operated, fresh outside air of the outdoor 6 is sucked by the air supply blades 8 and is passed through the pipe 5A from the air supply port 7 to the air guide cylinder 20.
While being sucked into the inside, it passes through the air guide tube portion 20, and a part thereof goes around to the space between the upper and lower, left and right inner wall portions of the main body frame 4 and the outer peripheral portion of the air guide tube portion 20,
The room 2 is supplied with air from the outlet 14 of the grill 15.

When high-temperature outside air passes through the interior of the main body frame 4 in the room 2 cooled in summer, the outside air
Since the second heat insulating space portion 21 provided in the air guide tube portion 20 is interposed in addition to the first heat insulating space portion 13, the dew condensation does not occur more on the inner wall surface of the main body frame 4 and the room is heated in winter. 2
Even if the outside air having a low temperature is continuously supplied, the outside air is
Similarly, when passing through the inside, the temperature of the outer wall surface of the main body frame is less likely to decrease, so that room air is less condensed on the outer wall surface of the main body frame 4.

Thus, according to the second embodiment of the present invention,
When the temperature difference between the supplied outside air and the room is large, dew water is generated on the inner wall surface or the outer wall surface of the main body frame 4 and dripped on the floor surface, thereby more reliably preventing the room 2 from being contaminated. Can be.

Further, since the electric motor 9 is fixed inside the small cylindrical portion 19 of the air guide tube portion 20, there is no need to provide a large motor fixing portion.
Are formed in a double cylindrical shape, so that the strength of the fixed portion of the electric motor 9 is improved.

In addition, even if the low-temperature outside air is continuously supplied to the room 2 heated in winter for a long period of time, and the air inside the second heat insulating space 21 is dewed to form dew condensation water, the heat insulating space 2 is kept. Since the interior 2 side of the portion 21 is closed by the closing flange portion 18, the dew condensation water does not flow out into the main body frame 4 and drip onto the transmission component 25, and therefore, the transmission component 25 The mounting position can be freely selected.

[0027]

As is apparent from the above embodiments, according to the present invention, the first heat insulating space which does not come into contact with the outside air passing through the inside of the main frame is provided on the wall of the main frame. When the temperature difference between the outside air to be supplied and the room is large,
It is possible to provide an air supply fan capable of preventing dew condensation water from being generated on the inner wall surface or the outer wall surface of the main body frame and dripping on the floor surface or the like, thereby preventing the room from being soiled.

Further, a cylindrical air guide tube portion communicating with the air supply port is provided so as to protrude inside the main body frame, and a second heat insulating member which does not come into contact with the outside air passing through the air guide tube portion is provided on the air guide tube portion. By providing the space, it is possible to more reliably prevent the occurrence of dew condensation on the inner wall surface or the outer wall surface of the main body frame.

Further, by fixing the electric motor inside the small cylindrical portion of the double cylindrical air guide cylinder, the fixing strength of the electric motor can be improved while exhibiting the above-mentioned effects.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an installation state of an air supply fan according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an installation state of an air supply fan of the second embodiment.

FIG. 3 is a vertical cross-sectional view showing an installation state of a conventional air supply fan.

[Explanation of Signs] 1 room wall 2 room 3 discharge port 4 main body frame 5 opening 6 outdoor 7 air supply port 8 air supply blade 9 motor 13 first heat insulation space 17 large cylindrical section 19 small cylindrical section 20 air guide cylinder Part 21 Second heat insulation space

Claims (3)

(57) [Claims] 1. A box-shaped main body frame provided on a room side of a room wall and having a discharge port on the front surface and an air supply port on the rear surface communicating with the outside through an opening provided on the room wall. A motor provided inside the main body frame, and fixed to an air supply blade that sucks outside air into the main body frame from the air supply port and supplies air into the room through the discharge port, and a wall portion of the main body frame, An air supply fan provided with a first heat insulating space that does not come into contact with outside air passing through the inside of the main body frame. 2. A second heat insulating member which is provided with a cylindrical air guide tube communicating with an air supply port and protrudes inside the main body frame and which does not come into contact with outside air passing through the air guide tube. The air supply fan according to claim 1, wherein a space portion is provided. 3. The air guide cylinder portion is formed in a double cylinder shape including a large cylinder portion and a small cylinder portion, and a second cylinder is provided between an inner periphery of the large cylinder portion and an outer periphery of the small cylinder portion. 3. The air supply fan according to claim 2, wherein said heat supply space is formed so as to form a heat insulating space, and an electric motor is fixed inside said small cylindrical portion.