JPS6248141B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchange ventilation system using a so-called counterflow type heat exchanger.

Conventionally, in this type of ventilation system, exhaust and intake shafts are provided at positions facing both end surfaces of a counterflow type heat exchanger body in which first and second ventilation passages are formed alternately. One with a flowing fan is known. However, in the above configuration, the thickness of both axial fans is added to the axial length of the heat exchanger body, so the overall thickness becomes large, and the fan shaft that connects the two axial fans also becomes long. However, there were problems in that the processability was reduced and run-out was likely to occur.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat exchange ventilation system in which the overall thickness can be made as small as possible and the fan shaft can be shortened.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a room wall that partitions the inside and outside of the room, 2 an opening formed in this room wall 1 for installing a ventilation fan, Reference numeral 3 denotes a cylindrical outer casing that is attached to this opening 2 and forms an exhaust port 4 on the end face on the outdoor B side, and has an open end on the indoor A side, and 5 is a peripheral wall of the outer casing 3 that projects toward the outdoor B side. 6 is an indoor air intake port formed approximately in the center of a decorative hood 7 attached to the end of the outer casing 3 on the indoor A side; 8 is an indoor air intake port formed intermittently in the interior A side of the interior This is an outlet for outdoor air that is intermittently formed on the peripheral surface of the vent. Reference numeral 9 denotes a mounting frame that is fitted and fixed inside the outer casing 3, and approximately in the center thereof has a cylindrical frame portion 10 that bulges out from the outdoor B side end of the outer casing 3 toward the indoor A side end. is forming. Reference numeral 11 denotes a heat exchanger main body disposed inside the outer casing 3, which has a double cylindrical shape with an inner cylindrical wall 12 and an outer cylindrical wall 13, as shown in FIG. First and second air passages 1 that extend in the axial direction and are alternately partitioned by a large number of heat exchange walls 14 that extend in the radial direction.
5 and 16 are formed. In this embodiment, the first air passage 15 is open at both ends of the inner cylindrical wall 12, with the opening on the indoor A side being the first inlet 17 and the opening on the outdoor B side being the first inlet. Outlet 1
8, and the second ventilation path 16 is open at both ends of the outer cylinder wall 13 in this embodiment, with the opening on the outdoor B side serving as the second inlet port 19 and the opening on the indoor A side serving as the second inlet port 19. A second outlet 20 is provided. 21 and 2
Reference numeral 2 denotes an annular front end plate and rear end plate that close both front and rear open ends of the heat exchanger main body 11. Thus, the heat exchanger main body 11 configured as described above has an inner cylinder wall 12.
is fitted into the cylindrical frame portion 10 of the mounting frame 9 to form the outer casing 3.
The first inlet 17 and the second outlet 20 are communicated with the room A via the intake port 6 and the outlet 8, respectively, and the first outlet 18 and the second outlet The inlet 19 is communicated with the outdoors B via the exhaust port 4 and the intake port 5, respectively. 23 is the inner cylinder wall 1
2, which is fixed to the closing plate part 10a of the cylindrical frame part 10. 24
2 is an exhaust fan which is a first centrifugal fan fitted on the rotating shaft 23a of this motor 23. This fan is disposed inside the end of the inner cylinder wall 12 on the indoor A side, and its blades 24a group are connected to the first centrifugal fan. It faces the first inflow port 17 group. Reference numeral 25 designates an intake fan as a second centrifugal fan, which has a rotary shaft 25b fixed to the center of its end plate 25a integrated with that of the exhaust fan 24, and has a large number of holes on one side of the end plate 25a. The blades 26 are arranged in a circular manner to surround the end of the outer cylinder wall 13 on the indoor A side, and the group of blades 26 is connected to the second outlet 2.
It is arranged to face the 0 group. Reference numeral 27 denotes a number of approximately fan-shaped openings formed along the circumferential direction at approximately the center of the end plate 25 a of the intake fan 25 , which allows air from the indoor A side to be drawn into the inner cylinder wall 12 by the exhaust fan 24 . It has become possible to absorb it. Reference numeral 28 denotes a reinforcing ring connected to extend around the outer periphery of the tip of each blade 26 of the intake fan 25.

Next, the operation of the above configuration will be explained. When the motor 23 is driven, the exhaust and intake fans 2
4 and 25 rotate together. Then, the indoor air is sucked by the exhaust fan 24 through the intake port 6 of the cosmetic hood 7 as shown by arrow C in FIG. The air is introduced from the inlet 17, flows out from the second outlet 18, and is discharged to the outside B through the exhaust port 4 of the outer casing 3. On the other hand, outside air is sucked into the second air passage 16 from the second inflow port 19 through the air intake port 5 of the outer casing 3 by the air intake fan 25 as shown by arrow D in FIG. After passing through, it is discharged into the room A through the second outlet 20 and the exhaust port 8 of the makeup hood 7. In this process, the indoor air and the outdoor air flowing in opposite directions through the adjacent first and second ventilation passages 15 and 16 exchange heat through the heat exchange wall 14, so the room temperature in the room A hardly changes. Room A can be ventilated.

FIGS. 3 and 4 show second and third embodiments of the present invention, respectively. The same parts as in the first embodiment are given the same reference numerals and explanations will be omitted, and only the different parts will be described. In both embodiments, the heat exchanger body 1
The second inlet 29 of the second air passage 16 of No. 1 is formed in the rear end plate 22 of the heat exchanger 11, whereas the outdoor air intake port 30 is formed in the end surface of the outer casing 3 on the indoor B side. is forming. In the second embodiment shown in FIG. 3, an exhaust fan 31 serving as a first centrifugal fan is used.
is arranged inside the end portion of the inner cylinder wall 12 on the indoor A side, and has its wing pieces 31a group facing the first inlet port 17 group, and contrary to the first embodiment, its end plate portion 31
b is located on the motor 23 side. With this configuration, it is not necessary to form a ventilation opening in the end plate portion 31b. Further, in the third embodiment shown in FIG. 4, the exhaust fan 32, which is the first centrifugal fan, is
A group of blades 32a is provided on an end plate 25a of an intake fan 25, which is a second centrifugal fan, so as to protrude inward from the inner cylinder wall 12. With this configuration, the intake fan 25 and the exhaust fan 32 can be integrated, and the structure can be simplified.

As described above, the present invention forms a counterflow type heat exchange air body into a double cylindrical shape, and the opening through which air flows into the first and second air passages is provided at one end side of the heat exchanger body. It is characterized in that the first and second centrifugal fans are formed on the inner cylinder wall and the outer cylinder wall, respectively, and are arranged inside the inner cylinder wall and outside the outer cylinder wall, respectively, and as a result, It is not necessary to arrange each fan in a part facing both end surfaces of the heat exchanger body,
In addition, since the motor can be built into the inner cylinder wall, the overall thickness can be reduced and the design can be made thinner.Moreover, since both fans are located on the same side, the rotation axis of the motor, etc. Since there is no need to make the fan shaft long, it is possible to provide a heat exchange ventilation device that is excellent in workability and has effects such as being able to solve the problem of runout.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is an overall vertical sectional view, FIG. 2 is a perspective view of the heat exchanger main body, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a diagram corresponding to FIG. 1 showing an example, and FIG. 4 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention. In the figure, 11 is the heat exchanger body, 12 is the inner cylinder wall, 1
3 is an outer cylinder wall, 14 is a heat exchange wall, 15 and 16 are first and second air passages, 23 is a motor, 24, 31
and 32 is an exhaust fan (first centrifugal fan);
25 is an intake fan (second centrifugal fan).

Claims (1)

[Claims] 1 A heat exchanger main body having a double cylindrical shape having an inner cylinder wall and an outer cylinder wall, and a space between the inner and outer cylinder walls alternately divided by heat exchange walls, each having one end connected to the heat exchanger. first and second air passages that are open at one end of the main body and whose other ends are opened at the inner and outer cylinder walls of the other end of the heat exchanger main body, respectively; and the inside of the other end of the inner cylinder wall. a first centrifugal fan disposed on the wall for causing air to flow into the first ventilation passage; and a second centrifugal fan disposed coaxially with the first centrifugal fan so as to surround the other end of the outer cylindrical wall. A heat exchange ventilation device comprising: a second centrifugal fan that sucks air from a passageway; and a motor disposed inside the inner cylinder wall and driving the first and second centrifugal fans.