JP3297564B2 - Simultaneous supply and exhaust ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous supply / discharge type ventilation fan mainly used for ventilation of a house or the like.

[0002]

2. Description of the Related Art In recent years, the degree of airtightness of homes has been increased, and as a result, the necessity of ventilation has been increased, and there has been a demand for one that can realize effective and comfortable ventilation.

In order to realize effective ventilation in a highly airtight house, there is an increasing demand for a simultaneous supply / exhaust type ventilation fan that supplies air in proportion to the amount of air exhausted by ventilation and stabilizes the indoor pressure. Is coming.

Hitherto, a simultaneous supply / discharge type ventilation fan of this type has been provided as disclosed in Japanese Utility Model Laid-Open No. 185526/1984. The configuration is described below with reference to FIGS.
This will be described with reference to FIG.

[0005] As shown in the figure, a ventilation fan 100 is attached to a through-hole 101A of a wall 101 of a building.
A motor 103 is attached to the frame 102 of the “0”, and a blade 104 is attached to the motor 103.
An orifice 106 and a front cover 105 are attached to the frame body 102 so as to surround the blades 104 on the outside. The front cover 105 is provided with an upper opening 105A for air supply and a left and right opening 105B for exhaust at a rising portion from the wall surface thereof. The opening 105A for air supply and the opening 105A for exhaust are respectively provided. A partition 106A is provided in the orifice 106 so as to separate the opening 105B. Further, an opening 106 </ b> B communicating with the inside of the frame body 102 is opened in the air supply side portion of the partition 106 </ b> A of the orifice 106.

In the above configuration, when the electric motor 103 is operated, the blades 104 rotate to suck the air in the room 107 from the opening 105B of the front cover 105 and exhaust it to the outside 109 as shown by an arrow 108. At this time, since the pressure in the room is reduced due to the exhaust, the fresh air from the outside of the room is indicated by an arrow 1.
As shown in FIG. 10, air is supplied to the room 107 through the air supply opening 106B of the front cover 105 through the air supply opening 106B of the orifice 106 (this air supply method is called a natural air supply method). .). The partition 106A provided in the orifice 106 inside the front cover 105 prevents the exhaust air and the supply air from being short-circuited and mixed inside the apparatus. Further, since the air supplied to the room 107 blows out only above the front cover 105, the air exhausted from the left, right, and below is less likely to be mixed near the device, and the ventilation can be performed efficiently.

There is also a ventilating fan which forcibly supplies air at the same time as the exhaust (this type of system is called a simultaneous simultaneous exhausting system), for example, as disclosed in Japanese Utility Model Laid-Open No. 55-3266. Was. Hereinafter, the configuration will be described with reference to FIGS.

As shown in FIG. 1, reference numeral 201 denotes a frame, and an exhaust pipe 2 forming an air supply passage 202 with the frame 201.
And a bell mouth 2 composed of a tubular portion and a trumpet portion having substantially the same diameter as the exhaust tube 203.
An exhaust axial flow fan 204B is provided inside 04A, and an air supply centrifugal fan 204C is integrally formed outside.
An electric motor 205 for driving the air supply / exhaust fan 204
Is mounted inside the exhaust pipe 203, and this exhaust pipe 2
03 forms an exhaust path 207, and the front cover 206
Has opened an exhaust port 206A at the front so as to guide the bell mouth 204A of the air supply / exhaust fan 204, and opened an air supply port 206B at its rising portion.

In the above configuration, the air supply / exhaust fan 204 is rotated by the driving of the electric motor 205, and the air in the room 208 is sucked from the exhaust port 206A of the front cover 206 by the exhaust axial flow fan 204B inside the fan. Road 207
And exhaust to the outdoor 209 as indicated by an arrow 210. At the same time, the outside air supply fan 204C causes the outdoor 20
9 is sucked from the air supply passage 202 and passes through the air supply port 206B of the front cover 206, as indicated by an arrow 211 in the room 208.
To supply air. The air to be exhausted is sucked from the front surface of the front cover 206, and the supplied air blows out above and to the left and right of the rising portion of the front cover 206, so that air is less mixed inside the room and efficient ventilation can be performed. .

[0010]

In such a conventional simultaneous supply / discharge type ventilation fan, in the former case, the front cover 105 is provided in order to prevent the supply air and exhaust air from being mixed near the equipment. Air supply opening 1 at the rise
05A and the exhaust opening 105B are provided, it is required that the mounting position of the ventilation fan 100 has no obstruction in the vertical and horizontal directions. In other words, there is a problem that this type of ventilation fan cannot be used at the corner of the wall of the room 107 or near the ceiling.

In the latter case as well, since the air supply port 206B is provided at the rising portion of the front cover 206 as described above, there is a problem that the mounting position is restricted.

The present invention solves the above-mentioned problem, and can prevent the supply air (hereinafter referred to as supply air) from being short-circuited to the exhaust port side near the front grill, thereby reducing the ventilation efficiency. A first object is to provide a simultaneous supply / discharge type ventilation fan.

A second object is to reduce the pressure loss at the front grille of the air supply. The third purpose is to prevent short-circuit between the air supply and exhaust near the front grill,
The purpose is to improve ventilation efficiency.

[0014]

In order to achieve the first object, a simultaneous supply / discharge type ventilation fan according to the present invention comprises a frame in which a supply passage and an exhaust passage are formed by a partition plate inside. Body, an air supply blower provided in the air supply flow path, an exhaust blower provided in the exhaust flow path, a heat exchanger mounting frame provided on the indoor side of the frame body, and a heat exchanger mounting A heat exchanger in which two air flow paths communicating with the air supply flow path and the exhaust flow path are formed orthogonal to each other in the frame, and the air flow path is disposed so as to be inclined; A front grille provided with a supply port and an exhaust port communicating with the flow path separated by an abutting portion abutting on a corner of the heat exchanger, and a rising portion formed to cover a front side of the heat exchanger; And a supply air flow that collides with a rising portion between a supply opening end portion of the front grille and a rising portion. A structure in which a recess made.

Further, in order to achieve the second object,
The second means has a configuration in which a small hole is opened at the bottom of the concave portion provided in the front grille to allow the supply air colliding with the concave portion to escape.

Further, in order to achieve the third object,
A third means is to provide a grid inclining in a straight line between the air supply port and the exhaust port across the contact portion formed between the air supply port and the exhaust port of the front grill, and to supply the air in the inclined direction of the grid. Conversely with mouth and exhaust.

[0017]

According to the first aspect of the present invention, when the supply air supplied by the recess provided in the front grill passes through the front grill, a part of the supply air flows to the rising portion of the front grill. As the overall direction of the supply air is not bent, the supply air is drawn into the room from the front grill and is sucked into the exhaust port side adjacent to the air inlet of the front grill to prevent reflection due to oblique collision. Therefore, the ventilation efficiency is prevented from lowering.

According to the configuration of the second means, the pressure loss in the front grill portion on the air supply side caused by a part of the supply air colliding with the concave portion of the front grill is reduced by the small size provided at the bottom of the concave portion. By reducing the supply air that has collided through the hole, the amount is reduced.

According to the configuration of the third means, the direction of the supply air is regulated by the inclined grid provided on the front grille, and the inclination of the grid of the adjacent exhaust port is made to be opposite to that of the air supply side. The suction direction of the supplied air is opposite to the supply air, so that the supplied air is less likely to be short-circuited to the exhaust side, and the ventilation efficiency can be improved.

[0020]

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, an air supply passage 2 and an exhaust passage 3 are formed inside by a partition plate 1 and a frame 6 attached to a ventilation port 5 provided in a wall portion 4 is provided. 2 is provided with an air blower 7, and the exhaust passage 3 is provided with an exhaust blower 8, and two air passages 9 a, which communicate with the air supply passage 2 and the exhaust passage 3.
The heat exchanger 9 is formed so that the heat exchanger 9 is formed in a substantially rhombic shape so that the heat energy of the exhaust air passing through one air flow passage 9a is recovered into the supply air passing through the other air flow passage 9b. 6 are accommodated in a heat exchanger mounting frame 11 provided on the side of the room 10 so that the air flow paths 9a and 9b are inclined, and one corner of the heat exchanger 9 abuts on the end 1a of the partition plate 1. Let it.

The air passages 9a, 9b of the heat exchanger 9
An air supply port 12 and an exhaust port 13 communicating with the heat exchanger 9 are separated by a contact portion 14 that contacts the other corner of the heat exchanger 9.
A front grille 17 having a rising portion 16 formed around a supply port 12 and an exhaust port 13 via a concave portion 15 so as to cover the front side of the heat exchanger 9, and an abutting portion 14 on the other corner of the heat exchanger 9. The heat exchanger 9 is attached to the heat exchanger attachment frame 11 in a state where the heat exchanger 9 is kept in contact with the heat exchanger 9.

In the above configuration, when the simultaneous supply / discharge type ventilation fan is operated, the air in the room 10 is exhausted by the exhaust blower 8.
The air is sucked from the exhaust port 13 of the front grill 17, passes through the heat exchanger 9 as shown by an arrow 18, and is discharged from the exhaust channel 3 to the outside 19. In addition, the air outside 19 is supplied from the air supply blower 7 through the heat exchanger 9 from the air supply passage 2 as shown by the arrow 20 to the room 10 through the air supply port 12 of the front grill 17 and is supplied to the heat exchanger. 9 recovers the heat energy of the room air being exhausted into the supplied air. At this time, a part of the supplied air that has flowed out from the outlet of the heat exchanger 9 collides with the rising portion 16 of the front grille 17, but is not reflected by the recess 15 and forms a vortex. As a result, as in the case where there is no recess 15, a part of the air supply reflected by the rising portion 16 of the front grille 17 causes the direction of the entire supply air 20 exiting from the air supply opening 12 into the room 10 to the air supply opening 12. It is pushed to the adjacent exhaust port 13 side and short-circuited due to the action of suction of the exhaust port 13, so that ventilation efficiency is not reduced and the direction of the supply air 20 is not affected.

As described above, according to the simultaneous supply / discharge type ventilation fan of the first embodiment of the present invention, the air supply port 1 opened adjacent to the front surface is provided.
Even when the air outlet 2 and the air outlet 13 are provided, a short circuit between the air supply and the air exhaust can be prevented, and efficient ventilation can be realized.

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 figure, the recess 1A is formed at the bottom of the recess 15A formed by the rising portion 16 of the front grill 17A.
A configuration is provided in which a small hole 21 for letting out the supply air colliding with 5A is provided.

With the above configuration, the supply air which is swirled in the recess 15A is converted into an airflow like 20a by the small holes 21 and escapes from the front grill 17A into the room 10, and the air is supplied to the recess 1A.
5A partially prevents the pressure from increasing, and as a result, the pressure loss of the supply air can be reduced. And small hole 2
The airflow 20a of the air supplied from 1 blows out at right angles to the small holes 21 and does not affect the direction of the supplied air 20.

As described above, according to the simultaneous supply / discharge type ventilation fan according to the second embodiment of the present invention, short-circuiting of supplied air to the exhaust side is prevented, pressure loss of supplied air is reduced, and efficient ventilation is achieved. Can be realized.

Next, a third embodiment of the present invention 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 figure, a grid 22 provided in a straight line across the contact portion 14A formed between the air inlet 12A and the air outlet 13A of the front grill 17B is provided with a lattice 22 on the side of the air inlet 12A. The air supply side grid 22a and the exhaust side grid 22b are formed such that the inclination directions are opposite on the exhaust port 13A side.

With the above configuration, the direction of the supply air flow blown into the room from the air supply port 12A and the direction of the flow of the indoor air sucked into the exhaust port 13A are determined by the air supply side lattice 22a and the exhaust side lattice 22b provided respectively. Direction, the direction is reversed, and the air supplied from the front grille 17B is
The number of short circuits to the A side is extremely reduced. In addition, by reversing the direction of the supplied air and the direction of the exhausted air, the indoor air can be efficiently circulated.

As described above, according to the simultaneous supply / discharge type ventilation fan according to the third embodiment of the present invention, the short-circuit of the supplied air to the exhaust side can be extremely reduced, and the circulation of the indoor air can be promoted. Ventilation efficiency can be improved.

[0033]

As is apparent from the above embodiments, according to the present invention, a frame having an air supply passage and an exhaust passage formed therein by a partition plate, and an air supply blower provided in the air supply passage. An exhaust blower provided in the exhaust flow path, a heat exchanger mounting frame provided on the indoor side of the frame, and the heat exchanger mounting frame communicating with the air supply flow path and the exhaust flow path. A heat exchanger in which two air flow paths are formed orthogonally and the air flow paths are inclined, and an air supply port and an exhaust port communicating with the air flow path of the heat exchanger are connected to the heat exchanger. A front grill provided with a rising portion so as to cover a front side of the heat exchanger, provided separately by an abutting portion abutting on a corner of the exchanger;
Since the supply air that collides with the rising portion forms a vortex between the end portion of the front grill and the rising portion, the supply air is short-circuited to the exhaust side near the front grill, and the ventilation efficiency is reduced. It is possible to provide a simultaneous supply / discharge type ventilation fan which can prevent the exhaust fan from being operated.

In addition, since a small hole is provided at the bottom of the concave portion provided on the front grille to allow the supply air colliding with the concave portion to escape, the pressure loss of the supply air at the front grill portion can be reduced.

Further, a grid is provided which is linearly inclined at the air supply port and the exhaust port across the contact portion formed between the air supply port and the exhaust port of the front grill, and the inclination direction of the grid is changed to the air supply port. Since the side and the exhaust port are configured to be reversed, it is possible to prevent the supply air and the exhaust from being short-circuited in the vicinity of the front grill and to improve the ventilation efficiency.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an installation state of a simultaneous supply / discharge type ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a front grill portion of the simultaneous supply / discharge type ventilation fan according to the second embodiment;

FIG. 3 is a perspective view showing a front grill of the simultaneous supply / discharge type ventilation fan according to the third embodiment;

FIG. 4 is a sectional view showing an installation state of a conventional simultaneous supply / discharge type ventilation fan.

FIG. 5 is a front view showing the simultaneous supply / discharge type ventilation fan;

FIG. 6 is a sectional view showing another simultaneous supply / discharge type ventilation fan;

FIG. 7 is a perspective view showing a front cover of the simultaneous supply / discharge type ventilation fan;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Partition plate 2 Air supply flow path 3 Exhaust flow path 6 Frame 7 Air supply blower 8 Exhaust air blower 9 Heat exchanger 9a Air flow path 9b Air flow path 11 Heat exchanger mounting frame 12 Air supply port 12A Air supply port 13 Exhaust port 13A Exhaust port 14 Contact portion 14A Contact portion 15 Recess 15A Recess 16 Rising portion 17 Front grill 17A Front grill 17B Front grill 21 Small hole 22 Grid

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 7/08 101 F24F 7/10

Claims (3)

(57) [Claims] A frame having an air supply passage and an exhaust passage formed therein by a partition plate; an air blower provided in the air supply passage; an exhaust blower provided in the exhaust passage; A heat exchanger mounting frame provided on the indoor side of the frame, and two air flow paths communicating with the air supply flow path and the exhaust flow path intersectingly formed in the heat exchanger mounting frame; A heat exchanger disposed so that a path is inclined, and an air supply port and an exhaust port communicating with an air flow path of the heat exchanger are separated by a contact portion that comes into contact with a corner of the heat exchanger. A front grill having a rising portion formed so as to cover the front side of the heat exchanger, and between an air supply port end and the rising portion of the front grill ,
A simultaneous supply / discharge type ventilation fan having a concave portion which opens rearward and in which the supply air colliding with the rising portion forms a vortex. 2. The simultaneous supply / discharge type ventilation fan according to claim 1, wherein a small hole is formed at the bottom of the concave portion provided on the front grille to release the supply air colliding with the concave portion. 3. A grid that is linearly inclined between the air supply port and the exhaust port across the contact portion formed between the air supply port and the exhaust port of the front grill, and the inclination direction of the grid is changed to the air supply. The simultaneous supply / discharge type ventilation fan according to claim 1 or 2, wherein the ventilation port is configured to be reversed on the mouth side and the exhaust port side.