JPH07158922A - Heat exchanger type ventilating fan - Google Patents

Abstract

PURPOSE:To reduce manufacturing cost without spoiling coping property as well as workability for a building of highly sealed and highly insulated from heat and reduce the propagation of noise, generated from a ventilating device, into a room without deteriorating beautiful indoor appearance. CONSTITUTION:Forced simultaneous air supplying and discharging can be effected by one set of ventilating device 22 by a method wherein the inside of a frame body 1 is partitioned by a partitioning tube 6 into an exhaust air passage 8 and a supplying air passage 9 and a heat exchanger is provided in the indoor side of the inside of the frame body 1 while a ventilating device 22, equipped with air supplying vanes 21C and air supplying and discharging vanes 21, is provided in the outdoor side of the same. In this case, the ventilating device 22 is not positioned in the indoor side 4 whereby the size of projection of the ventilating device 22 out of the wall surface 2 is reduced and, further, noise, generated out of the ventilating device 22, is attenuated upon passing through the air supplying and discharging passages 8, 9 as well as the heat exchanger 14 and, thereafter, is propagated to the inside 4 of the room. On the other hand, the installation work of the fan can be completed by a simple work wherein the frame body l is inserted into and fixed to the mounting holes 3 thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange type ventilation fan mainly used for ventilation of houses and the like.

[0002]

2. Description of the Related Art In recent years, housing has become highly airtight, and as a result of this, the need for ventilation has increased, and at the same time supply and exhaust of air to match the amount exhausted by ventilation to stabilize the pressure in the room. There is an increasing demand for ventilation that reduces the energy loss by performing heat exchange between the air supply and exhaust, and there is a demand for even better workability.

For this reason, a conventional heat exchange type ventilation fan has been provided, for example, as shown in JP-A-5-157308. The configuration will be described below with reference to FIG.

As shown in the figure, a pipe (or a mounting hole) 102 penetrating through the wall member 100 is inserted and installed, and has a cylindrical shape that communicates between the indoor 103 side and the outdoor 104 side,
A cylindrical case 10 with one open end facing the indoor 103 side and the other open end facing the outdoor 104 side.
Inside the 5, a heat exchanger 106 having an air supply passage and an exhaust passage (not shown) is arranged. A supply air blower 109 including an electric motor 107 and blades 108 is provided at the opening of the cylindrical case 105 on the side of the room 103. The supply air blower 109 is connected to the air supply passage of the heat exchanger 106. There is. Further, an exhaust air blower 110 including an electric motor 107A and blades 108A is provided at the outdoor 104 side opening of the cylindrical case 105.
Are communicated with the exhaust passage of the heat exchanger 106.

A decorative cover 111 for covering the air supply / blowing device 109 is provided on the indoor side 103 side of the cylindrical case 105, while a hood for covering the exhaust / blowing device 110 on the outdoor side 104 side of the cylindrical case 105. 112 is provided.

In the above structure, when the heat exchange type ventilation fan is operated, the dirty air on the side of the room 103 is discharged by the exhaust blower 11.
0 is sucked, passes through the exhaust passage of the heat exchanger 106 and is discharged to the outdoor 104 side, while fresh air on the outdoor 104 side is sucked by the air supply / blowing device 109 to supply air to the heat exchanger 106. Air is supplied to the room 103 side through the passage. Then, when the indoor air and the outdoor air pass through the heat exchanger 106, heat is exchanged by the heat exchanger 106, energy loss due to ventilation during cooling and heating is reduced, and air to be exhausted and supply air are supplied. Since the air to be blown is forcibly blown by the blowers 109 and 110, respectively, it is possible to efficiently ventilate even in a building with high airtightness.
The tubular case 10 is attached to the pipe 102 provided on the wall member 100.
The construction work can be completed by a simple work of inserting and fixing the No. 5, which is effective for ventilation of a highly airtight and highly heat-insulating building and has good workability.

[0007]

In such a conventional heat exchange type ventilation fan, the supply air blower 109 and the exhaust blower 1 are provided.
10 and the inner side 103 side of the cylindrical case 105 and the outer side 104
Since the blower device for forced simultaneous air supply and exhaust is configured by separately disposing the blower device on the side, the number of parts of the blower device increases, the manufacturing cost thereof increases, and the air supply and blower device 1
Since 09 is located on the indoor side 103 side,
The amount of money from the wall surface of the decorative cover 111 increases, the aesthetic appearance of the room 103 decreases, and the air supply / blowing device 109
There is a problem that noise generated from the room propagates to the room 103.

The present invention solves the above-mentioned problems, and reduces the manufacturing cost by reducing the number of parts of the air blower as much as possible without impairing the adaptability to a highly airtight and highly insulating building and the workability. A first object of the present invention is to provide a heat exchange type ventilation fan capable of eliminating the deterioration of the aesthetics of the room and reducing the propagation of noise generated by the air blower into the room 103.

The second purpose is that due to the influence of outside wind,
This is to prevent the exhaust efficiency from decreasing even if the outdoor pressure of the ventilated building rises above the indoor pressure.

A third object is to reduce the mixing of the exhaust gas with the supply air and improve the ventilation efficiency.

A fourth object is to reduce air mixing between the exhaust ventilation passage and the supply air ventilation passage.

A fifth object is to realize the fourth object at a lower cost. A sixth object is to prevent pollutants such as dust and pollen contained in the outdoor air from being mixed with the outdoor air and supplied to the room.

[0013]

A first means for achieving the above first object of the present invention is a cylindrical shape that is inserted and installed in a mounting hole that penetrates a wall surface and that connects the indoor side and the outdoor side. And a partitioning tube that is provided inside the frame and has a tubular shape that forms an exhaust ventilation path between the outer peripheral portion of the frame and the inner peripheral portion of the frame, and that uses the interior as a supply ventilation path. A heat exchanger provided inside the frame body on the indoor side for exchanging heat between the air passing through the exhaust ventilation passage and the air supply ventilation passage; and the partition tube provided on the outdoor side inside the frame body. And a supply / exhaust blade having an air supply blade inside the blade partitioning cylinder, and an electric motor having the supply / exhaust blade fixed thereto. And a partitioning device for the interior side of the blade partitioning cylinder and the partitioning device. The space between the outer peripheral portion of the blade partitioning cylinder and the inner peripheral portion of the frame is made to be an exhaust air passage continuous with the exhaust air passage by making the outer side end portion of the cylinder close to each other, and the blade is also provided. A heat exchange type ventilation fan has a structure in which the interior of the partition tube is an air supply ventilation passage continuous with the air supply ventilation passage.

A second means for achieving the second object is a heat exchange type ventilation fan in which a part of the exhaust blade of the air supply / exhaust blade is projected from the outdoor side end of the frame. is there.

Further, a third means for achieving the third object is a spiral shape for guiding and converging the indoor air discharged from the exhaust vanes to the outdoor side end of the frame body and discharging the indoor air. A scroll is provided, and a heat exchange type ventilation fan is provided in which the orifice for guiding the outdoor air is formed in the air supply blade at the center of the scroll.

A fourth means for achieving the fourth object is to provide a small blade for blowing air in a direction opposite to the exhaust blade on the outer peripheral side of the blade partition tube of the air supply / exhaust blade on the indoor side. The heat exchanging type ventilation fan has a structure in which a part is arranged close to the inner peripheral part of the partition tube.

A fifth means for achieving the fifth object is a structure of a heat exchange type ventilation fan in which the shape of a gap formed by adjoining the ends of the partition cylinder and the blade partition cylinder is bent. It is what

A sixth means for achieving the sixth object is a heat exchange type ventilation fan having a filter in the air supply passage.

[0019]

According to the present invention, by the structure of the above-mentioned first means, the inside of the cylindrical frame is divided into the exhaust ventilation passage and the supply ventilation passage by the cylindrical partition tube, and the outdoor side of these ventilation passages. Since the air blower consisting of the air supply / exhaust vanes having the exhaust vanes and the air supply vanes and the electric motor is provided, forced air supply / exhaust can be performed by one air blower, and the air blower is not located inside the room. In addition, there is little margin from the wall surface, and the noise generated from the blower is attenuated when passing through the air supply / exhaust ventilation passage and the heat exchanger, and then propagates indoors. Further, the construction work can be completed by a simple work of inserting and fixing the frame body into the mounting hole provided in the wall surface.

Further, according to the structure of the second means, a part of the exhaust blade of the air supply / exhaust blade is projected from the outdoor side end portion of the frame body, and this projected portion functions as a centrifugal blower blade, and ventilation is performed. Even when the outdoor pressure of the building is higher than the indoor pressure, the indoor air can be efficiently discharged to the outside.

With the structure of the third means, the indoor air discharged from the exhaust blades of the air supply / exhaust blades to the outside is efficiently guided by the scroll and is converged and discharged to the outside. It becomes difficult to mix with the outdoor air flowing into the air blades, and the outdoor air is
It will be efficiently guided to the air supply blades.

Further, according to the structure of the fourth means, the pressure of the supply air passage rises above the exhaust air passage due to the action of the exhaust blade and the air supply blade of the supply / exhaust blade, and the air in the supply air passage is partitioned. The small blade pushes back the leaking air to the exhaust ventilation passage through the gap between the cylinder and the blade partitioning cylinder.

Further, according to the constitution of the fifth means, the ventilation resistance of the gap formed between the respective ends of the partition cylinder and the blade partition cylinder is increased, and the air in the supply air passage passes through this gap. Therefore, the leakage of air into the exhaust ventilation passage is greatly reduced.

According to the structure of the sixth means, when the outdoor air passes through the air supply ventilation passage, contaminants such as dust and pollen are collected by the filter and then supplied to the room. Becomes

[0025]

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 figure, reference numeral 1 denotes a cylindrical frame body, which is inserted into the mounting hole 3 formed in the wall surface 2 from the room 4 side and is formed on the outer periphery of the end on the room 4 side. 5 is fixed to the wall surface 2 by fixing means such as screws (not shown). Inside the frame body 1, a tubular partition tube 6 is fixed by ribs 7 integrally formed on the inner peripheral portion of the frame body 1. The outer peripheral portion of the partition barrel 6 and the inner peripheral portion of the frame body 1 are fixed to each other. An exhaust air passage 8 and a partition air supply passage 9 are defined as a space between them. Also,
The outdoor 10 side of the partition tube 6 is formed into a cylindrical cylindrical portion 11 positioned concentrically with the frame body 1, and the indoor 4 side of the partition tube 6 is provided with an air supply element of a heat exchanger 14 described later. It inclines upward toward the inflow port 13B of the ventilation passage 13.

An orthogonal heat exchanger 14 in which a plurality of exhaust element ventilation passages 12 and a plurality of air supply element ventilation passages 13 are orthogonal to each other is arranged on the side of the room 4 inside the frame 1. . The heat exchanger 14 includes the outlet 12 of the exhaust element ventilation passage 12.
A communicates with the exhaust ventilation passage 8 and an inflow port 12B communicates with the room 4 side, and the inflow port 13B of the air supply element ventilation passage 13 communicates with the supply air ventilation passage 9 and the outflow port 13A communicates with the indoor room 4 side. At the same time, the exhaust element ventilation passage 12 is supported by a partition rib 15 projecting on the inner peripheral portion of the frame body 1 so as to incline downward toward the outdoor side 10.

A decorative cover 16 for covering the opening of the frame 1 on the side of the room 4 is detachably provided on the side of the frame 1 on the side of the room 4, and a partition rib 16A provided on the decorative cover 16 is provided. The tip of the heat exchanger 14 to the exhaust element ventilation passage 12
Inlet 12B and outlet 13A of the air supply element ventilation passage 13
The indoor side suction port 17 that connects the inflow port 12B of the exhaust element ventilation passage 12 and the room 4 by abutting on the ridge portion between the exhaust air passage 12 and the indoor air inlet 13B of the air supply element ventilation path 13 4 and the indoor-side discharge port 18 that communicates with the No. 4 are defined.

On the outdoor 10 side inside the frame 1, an electric motor 20 supported by a supporting rib 19 projecting inward from the inner circumference of the cylindrical portion 11 of the partition tube 6, and the outdoor 10 of the electric motor 20. Supply / exhaust blade 2 fixed to a rotary shaft 20A facing toward the side
A blower device 22 composed of 1 and 1 is provided. The air supply / exhaust blade 21 has a cylindrical blade partition cylinder 21A having substantially the same outer diameter dimension as the cylindrical portion 11 of the partition cylinder 6, and a plurality of exhaust blades 21B are provided on the outer peripheral portion of the blade partition cylinder 21A.
A plurality of air supply blades 21C are integrally formed on the inner peripheral portion, and at the time of rotation, the exhaust air blades 21B and the air supply blades 21C are formed so as to blow air in mutually opposite directions. Also, the electric motor 20
The rotary shaft 20A of the partition cylinder 6 is positioned on the central axis of the cylindrical part 11 of the partition cylinder 6 to arrange the blade partition cylinder 21A and the cylindrical part 11 of the partition cylinder 6 concentrically, and the interior of the blade partition cylinder 21A. Cylindrical part 1 of the partition cylinder 6 at the 4 side end
The space between the outer peripheral portion of the blade partitioning cylinder 21A and the inner peripheral portion of the frame 1 and the inside of the blade partitioning cylinder 21A are respectively brought closer to the outdoor 10 side end of the partitioning cylinder 6 and the outer peripheral side of the partitioning cylinder 6 and An exhaust ventilation passage 8 and an air supply ventilation passage 9 which are continuous inside are formed.

A bell-shaped bell mouth 26 is supported by a plurality of supporting ribs 23 projecting from the end of the frame 1 on the outdoor 10 side to the outdoor 10 side.
By bringing the end portion on the indoor side 4 side of the above into close proximity to the end portion on the outdoor 10 side of the blade partitioning cylinder 21A, the air supply ventilation passage 9 and the outdoor 10
An outdoor side suction port 24 that communicates with the outdoor side suction port 24 and an outdoor side discharge port 25 that communicates the exhaust ventilation passage 8 and the outdoor side 10 are defined.

In the above structure, the electric motor 20 is energized,
When the air supply / exhaust blade 21 is rotated, the dirty indoor air 27 in the room 4 passes through the indoor suction port 17 and the heat exchanger 1 by the suction action of the exhaust blade 21B, as indicated by the solid arrow.
4 is sucked into the exhaust air passage 12 from the inflow port 12B, passes through the exhaust air passage 12 into the exhaust air passage 8 from the outlet 12A, and further passes through the exhaust air passage 8. Then, the gas is discharged from the outdoor outlet 25 to the outdoor 10. On the other hand, by the suction action of the air supply blade 21C,
Fresh outdoor air 28 outside the room 10 is sucked into the air supply ventilation passage 9 from the outdoor suction port 24 as shown by the dotted arrow, and then passes through the air supply ventilation passage 9 to pass through the heat exchanger 14. The air is sucked into the air supply element ventilation passage 13 from the inflow port 13B, and further passes through the air supply element ventilation passage 13 to reach the outflow port 1
Air is supplied to the room 4 through the room-side discharge port 18 from 3A. The indoor air 27 and the outdoor air 28 are heated by the heat exchanger 14.
The heat is exchanged when passing through, and energy loss due to ventilation during cooling and heating is reduced.

Further, when the temperature of the indoor air 27 becomes extremely higher than that of the outdoor air 28 due to indoor heating such as in winter,
The indoor air 27 is rapidly cooled and condensed when passing through the exhaust element ventilation passage 12 of the heat exchanger 14, and condensed water (not shown) adheres to the inner wall surface of the exhaust element ventilation passage 12, The exhaust element ventilation passage 12 inclines downward toward the outdoor side 10 and the outlet 12A communicates with the exhaust ventilation passage 8. Therefore, the dew condensation water travels along the inner wall surface of the exhaust element ventilation passage 12. It flows into the exhaust ventilation passage 8 and is discharged from the outdoor discharge port 25 to the outdoor 10 by the suction action of the exhaust blade 21B.

Further, noises such as wind noise generated by the air supply / exhaust blades 21 and electric noise generated by the electric motor 20 are bent in their traveling direction when passing through the air supply / exhaust ventilation passage and the heat exchanger 14. After being attenuated as a result, it propagates to the room 4.

The decorative cover 16 may have a thickness sufficient to cover the opening of the frame 1 on the indoor side 4 side,
The amount of projection of the decorative cover 16 from the wall surface 2 toward the interior 4 can be significantly reduced.

Next, the construction work of the heat exchange type ventilation fan configured as described above will be described below.

First, the frame body 1 is inserted into the mounting hole 3 from the room 4 side, and the flange portion 5 of the frame body 1 is fixed to the wall surface 2 by the fixing means to open the frame body 1 on the room 4 side. The construction work can be completed by a simple work of covering the makeup cover 16 with the makeup cover 16.

As described above, according to the heat exchange type ventilation fan of the first embodiment of the present invention, the air supply and the exhaust can be forcibly and efficiently performed by one air blower 22, so that the number of parts of the air blower can be reduced. However, the manufacturing cost can be reduced and the power consumption can be reduced. Further, since the exhaust element ventilation passage 12 of the heat exchanger 14 is inclined downward toward the outdoor side 10 and the outlet 12A is communicated with the exhaust ventilation passage 8, dew condensation generated in the heat exchanger 14 is generated. Water can be surely prevented from flowing into the room 4, and
A heat exchanger 14 is provided inside the frame 1 on the side of the room 4 and outside 10
Since the blower 22 is disposed on the side, the noise generated from the blower 22 and propagating to the room 4 can be attenuated, and the amount of protrusion of the decorative cover 16 on the side of the room 4 is reduced. Can improve the aesthetics of
Furthermore, the construction work can be easily completed.

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

As shown in the figure, this embodiment is different from the first embodiment in that the outdoor 10 of the exhaust blade 21B of the air supply / exhaust blade 21 is used.
It is characterized in that the end portion on the side is projected from the end portion on the outdoor 10 side of the frame 1.

With the above structure, the portion of the exhaust blade 21B projecting from the end of the frame 1 is like a turbo fan.
The centrifugal force acts as a high-pressure centrifugal blower blade that expels the indoor air to the outer peripheral direction of the exhaust blade 21B, and even when the pressure outside the building to be ventilated is higher than the indoor air, the indoor air is discharged to the outside. It can be efficiently discharged.

As described above, according to the heat exchange type ventilation fan of the second embodiment of the present invention, even if the outdoor pressure of the building to be ventilated rises above the indoor pressure due to the influence of, for example, the outside wind.
It is possible to exhaust efficiently.

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

As shown in the figure, this embodiment is different from the second embodiment in that the exhaust blade 21 is provided at the end of the frame 1 on the outdoor 10 side.
A spiral scroll 30 that guides and converges the air discharged from B and discharges to the outdoor 10 side, and an orifice 31 that guides the outdoor air to the air supply blade 21C is formed at the center of the scroll 30. Is characterized by.

With the above structure, the indoor air 27 discharged from the exhaust blade 21B to the outdoor 10 is efficiently guided by the scroll 30, converged and discharged to the outdoor 10, and flows into the air supply blade 21C. Outdoor air 28
Therefore, the outdoor air 28 is efficiently guided to the air supply blade 21C by the orifice 31.

As described above, according to the heat exchange type ventilation fan of the third embodiment of the present invention, the exhausted indoor air 27 is scrolled by the scroll 3.
At 0, the supplied outdoor air 28 is efficiently guided to each by the orifices 31 and the mixing of the indoor air 27 discharged to the outdoor 10 with the supplied outdoor air 28 is reduced. The efficiency can be improved.

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

As shown in the figure, this embodiment is different from the second embodiment in that the outer diameter of the blade partition cylinder 21A is the same as that of the partition cylinder 6.
The inner diameter of the small blade 32 is smaller than that of the exhaust blade 21B, and a small blade 32 that blows air in a direction opposite to the exhaust blade 21B is provided on the outer periphery of the chamber 4 side. It is characterized in that it is located close to the inner peripheral portion of the cylindrical portion 11 of No. 6.

In the above structure, the supply air passage 9 becomes + pressure because the outdoor air 28 is sent by the supply blade 21C, and the exhaust air passage 8 becomes −pressure because it is sucked by the exhaust blade 21B. The pressure of the air ventilation passage 9 rises above the exhaust ventilation passage 8, and the air of the supply air ventilation passage 9 tries to leak to the exhaust ventilation passage 8 through the gap between the partition cylinder 6 and the blade partition cylinder 21A. Is pushed back by the small blade 32.

As described above, according to the heat exchange type ventilation fan of the fourth embodiment of the present invention, the air in the air supply ventilation passage 9 is discharged from the exhaust ventilation passage 8 through the gap between the partition cylinder 6 and the blade partition cylinder 21A.
It is possible to reduce the leakage.

Next, the fifth embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG.

The same components as those in the second embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in the drawing, this embodiment is different from the second embodiment in that an annular groove 33 opened to the partition cylinder 6 side is provided at the end of the blade partition cylinder 21A on the indoor 4 side and It is characterized in that the insertion piece 34 is extended over the entire circumference at the end portion of the cylinder 6 on the outdoor 10 side, and the insertion piece 34 is inserted in the groove 33 so as not to contact.

In the above structure, due to the reason described in the fourth embodiment, the air in the air supply ventilation passage 9 is about to leak to the exhaust ventilation passage 8 through the gap between the partition cylinder 6 and the blade partition cylinder 21A. However, since the narrow gap formed between the groove 33 and the insertion piece 34 has a complicated shape that is bent and has a large air flow resistance, leakage from this portion is greatly reduced.

As described above, according to the heat exchange type ventilation fan of the fifth embodiment of the present invention, the leakage of the air in the air supply ventilation passage 9 to the exhaust ventilation passage 8 can be greatly reduced, and the partition tube 6 is also provided. This can be achieved by a simple configuration in which the groove 33 is provided at the end of the blade partition tube and the insertion piece 34 is provided at the end of the blade partitioning cylinder 21A.

In this embodiment, the groove 33 is provided in the blade partition tube 21A, the insertion piece 34 is provided in the partition tube 6, and by combining them, the gap between the partition tube 6 and the blade partition tube 21A is reduced. Is bent so that the cross-sectional shape becomes a substantially U shape, but the shape is not limited to this, and the shape of the groove and the insertion piece may be changed, or these may be divided into the partition cylinder 6 or the blade partition cylinder. 21A, there is no difference in the action and effect, and if the shape of the gap is bent in a more complicated manner, the air in the air supply ventilation passage 9 can be further prevented from leaking to the exhaust ventilation passage 8. It will be possible.

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

As shown in the figure, the present embodiment is characterized in that a filter 36 is provided in the air supply ventilation passage 9 in comparison with the first embodiment.

With the above structure, when the outdoor air 28 passes through the air supply ventilation passage 9, contaminants such as dust and pollen are collected by the filter 36 and then supplied to the indoor space 4.

As described above, according to the heat exchange type ventilation fan of the sixth embodiment of the present invention, contaminants such as dust and pollen contained in the outdoor air 28 can be removed and the indoor air 4 can be supplied with air. Can create a unique environment.

[0060]

As is apparent from the above embodiments, according to the present invention, the inside of the cylindrical frame is divided into the exhaust ventilation passage and the supply ventilation passage by the cylindrical partition tube, and the frame is also provided. It is possible to perform forced simultaneous air supply / exhaust with one air blower by providing a heat exchanger inside the room and a blower consisting of an air supply / exhaust vane having an exhaust vane and an air supply vane and an electric motor outside the room. In addition, since the air blower is not located inside the room, there is little margin from the wall surface.Furthermore, the noise generated from the air blower is attenuated when passing through the air supply / exhaust ventilation passage and heat exchanger, and then In addition, since the construction work can be completed by a simple work of inserting and fixing the frame body into the mounting hole provided in the wall surface, it is applicable to a building with high airtightness and heat insulation, and workability. The number of parts of the blower is reduced without compromising It is possible to reduce the manufacturing cost of eliminating a reduction in the interior of aesthetics, also the noise generated by the blower can be provided the heat exchanger type ventilation fan capable of reducing the propagation of the room.

By projecting a part of the exhaust blades of the air supply / exhaust blades from the outdoor side end of the frame, the outdoor pressure of the building to be ventilated rises above the indoor pressure due to the influence of outside wind. Also, it is possible to prevent the exhaust performance from deteriorating.

Further, a spiral scroll for guiding and converging the indoor air discharged from the exhaust blades and discharging it to the outside is provided at the outdoor end of the frame, and the air supply blades are provided at the center of the scroll. By forming the orifice for guiding the outdoor air, it is possible to improve the ventilation efficiency because the dirty indoor air to be exhausted is less mixed with the outdoor air to be supplied.

Further, a small blade for blowing air in the opposite direction to the exhaust blade is formed on the inner peripheral side of the blade partitioning cylinder of the air supply / exhaust blade, and the outer peripheral side end of the small blade is the inner periphery of the cylindrical part of the partitioning cylinder. By bringing the air into the air supply ventilation passage, it is possible to reduce the leakage of the air in the air supply ventilation passage from the gap between the partition cylinder and the blade partition cylinder into the exhaust air ventilation passage.

Further, by bending the shape of the gap formed by the end portions of the partition cylinder and the blade partition cylinder being close to each other, the air in the air supply ventilation passage is discharged from the gap in the vicinity of the partition cylinder and the blade partition cylinder. Leakage to the exhaust ventilation passage can be reduced at a lower cost.

Further, by providing a filter in the air supply ventilation passage, it is possible to prevent pollutants such as dust and pollen contained in the outdoor air from being mixed with the outdoor air and supplied to the room.

[Brief description of drawings]

FIG. 1 is a sectional view showing the installation of a heat exchange type ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a fan, a frame and a partition tube of the heat exchange type ventilation fan of the second embodiment.

FIG. 3 is a partially cutaway perspective view of a fan, a frame, a partition tube and a scroll of the heat exchange type ventilation fan of the third embodiment.

FIG. 4 is a partially cutaway perspective view of an air blower, a frame and a partition tube of the heat exchange type ventilation fan of the fourth embodiment.

FIG. 5 is a cross-sectional view of a fan, a frame and a partition tube of the heat exchange type ventilation fan of the fifth embodiment.

FIG. 6 is an enlarged cross-sectional view of a gap formed by a partition tube and a blade partition tube adjacent to each other in the heat exchange type ventilation fan of the fifth embodiment.

FIG. 7 is a sectional view showing the installation of a heat exchange type ventilation fan of the sixth embodiment.

FIG. 8 is a sectional view of installation of a conventional heat exchange type ventilation fan.

[Explanation of symbols]

 1 Frame 2 Wall Surface 3 Mounting Hole 4 Indoor 6 Partition Tube 8 Exhaust Ventilation Path 9 Air Supply Ventilation Path 10 Outdoor 14 Heat Exchanger 20 Electric Motor 21 Air Supply / Exhaust Blade 21A Blade Partition Tube 21B Exhaust Blade 21C Air Supply Blade 22 Scroller 30 Scroll 31 Orifice 32 Small blade 36 Filter

Claims (6)

[Claims] 1. A cylindrical frame body that is inserted and installed in a mounting hole that penetrates a wall surface and that connects the indoor side and the outdoor side, and a cylindrical shape provided inside the frame body, and the outer peripheral portion and the frame body. An exhaust air passage is formed between the inner peripheral portion of the frame and a partition tube having an air supply air passage inside, and is provided on the indoor side inside the frame and passes through the exhaust air passage and the air supply air passage. And a heat exchanger for exchanging heat between the air, and an exhaust blade provided on the outer side of a cylindrical blade partition cylinder provided outside the interior of the frame body and concentric with the cylindrical portion of the partition cylinder. And an air supply device including an air supply / exhaust blade provided with an air supply blade inside the blade partition tube, and an air blower composed of an electric motor to which the air supply / exhaust blade is fixed, the indoor side end portion of the blade partition tube and the chamber of the partition tube. The outer peripheral portion of the blade partition tube is brought close to the outer end portion. And a space between the inner peripheral portion of the frame body and an exhaust ventilation passage that is continuous with the exhaust ventilation passage, and the inside of the blade partition tube is a heat exchange air passage that is continuous with the supply ventilation passage. Shaped ventilation fan. 2. The heat exchange type ventilation fan according to claim 1, wherein a part of the exhaust blade of the air supply / exhaust blade is projected from the outdoor end of the frame. 3. A spiral scroll for guiding and converging the indoor air discharged from the exhaust blade and discharging it to the outside is provided at the outdoor end of the frame, and the air supply blade is provided at the center of the scroll. The heat exchange type ventilation fan according to claim 1 or 2, wherein an orifice that guides outdoor air is formed. 4. A small blade that blows air in a direction opposite to the exhaust blade is provided on the outer peripheral side of the blade partition tube of the air supply / exhaust blade, and the outer peripheral part of the small blade is close to the inner peripheral part of the partition tube. The heat exchange type ventilation fan according to 1, 2, or 3. 5. The heat exchange type ventilation fan according to claim 1, 2 or 3, wherein the shape of a gap formed by adjoining the ends of the partition cylinder and the blade partition cylinder is bent. 6. The heat exchange type ventilation fan according to claim 1, 2, 3, 4, or 5, wherein a filter is provided in the air supply ventilation passage.