JPH063323Y2 - Simultaneous suction and exhaust type ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a simultaneous intake / exhaust type ventilation fan configured to rotate an intake fan and an exhaust fan by a single motor.

(Prior Art) Conventionally, for example, in a simultaneous intake / exhaust type ventilation fan such as an air-conditioning ventilation fan, an intake fan 3 is provided in an intake passage 2 and an exhaust fan 5 is provided in an exhaust passage 4 in a main body case 1 as shown in FIG. There is provided a fan which is provided in each of which both of the fans 3 and 5 are rotationally driven by a single motor 7 which penetrates the partition member 6 between them. In this case, however, the motor 7 is of a double shaft type, and the fans 3 and 5 are individually attached to both end portions of the rotary shaft 7a.

Therefore, in the case of this one, the fans 3 and 5 are required when assembling.
It was troublesome to install by advancing from different directions, rear and front. Further, since the motor 7 is located between the rotating fans 3 and 5, it is necessary to make the wiring robust such that the wiring process or the like is performed on either side of the partition member 6 on the fan 3 side or the fan 5 side. Assembly was even more troublesome.

On the other hand, as shown in FIG.
And a fan 9 having an intake fan portion 9a and an exhaust fan portion 9b integrally attached to the rotary shaft 8a is used to drive the rotation (JP-A-60-17595).
No. 0). According to this, the fan 9 can be installed by advancing from only one direction in the front side, and the wiring process for the motor 8 and the like, such as the inner back surface 1a of the main body case 1, is essentially unrelated to the fan 9. It can be made in place and does not have to be as robust as the one shown in FIG. 4, so that assembly is generally easier.

(Problems to be solved by the invention) However, in the case of the above-mentioned one, the fan 9
Partition member 12 for partitioning between the intake passage 10 in which the intake fan portion 9a is located and the exhaust passage 11 in which the exhaust fan portion 9b is located
Has a large opening 13 through which the entire fan 9 passes, and the size of the opening 13 causes rotation of the fan 9 between the inner circumference of the opening 13 and the outer circumference of the fan 9. The total amount of the gap 14 for allowing the air flow is large, and since it is the place closest to the winglets of the fan 9, the intake and the exhaust gas are largely mixed through the gap 15 and the ventilation efficiency is low. It had a problem that it could not be done.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to easily assemble and also to reduce the mixing of intake air and exhaust gas, thereby improving ventilation efficiency. Providing a simultaneous intake and exhaust type ventilation fan.

[Means for Solving the Problem] (Means for Solving the Problems) In the simultaneous intake / exhaust type ventilation fan of the present invention, an intake fan located in the intake passage and an exhaust fan located in the exhaust passage are rotationally driven by a single-axis single motor. And a first engaged portion to be engaged with a first rotary engaging portion provided on the rotation shaft of the motor is provided at the center of one of the two fans. A second rotary engaging portion is also provided, and a second engaged portion that is engaged with the second rotary engaging portion is provided in the center portion of the other fan, and the two fan are engaged with each other by their engagement. It is characterized in that it is partitioned by a partition member having an opening through which the mating connection portion passes.

(Operation) According to the above means, the intake fan and the exhaust fan can be sequentially advanced with respect to the motor from one direction to be assembled.
Further, wiring processing for the motor can be performed at a place not facing both fans. Further, the partition member for partitioning between the two fans may have a small opening through which the engaging and connecting portions of the two fans pass, and this is also a part far from the wing pieces of the fan, so that the intake air Mixing with exhaust can be reduced.

(Embodiment) The first embodiment of the present invention applied to an air-conditioning ventilation fan will be described below.
This will be described with reference to FIGS.

First, in FIG. 1, reference numeral 21 is a main body case, and as shown in FIG.
2, the outdoor air discharge port 23 is formed at the left end, and the outdoor air suction port 24 and the indoor air discharge port 25 are formed on the rear surface so as to be adjacent to each other in the central portion. . Reference numeral 26 denotes a two-layer structure intake / exhaust duct having an intake passage 26a and an exhaust passage 26b connected to the outdoor air intake port 24 and the indoor air discharge port 25, and 27 is disposed on the left side inside the main body case 21. It is an orthogonal heat exchanger installed.

On the other hand, 28 is a single motor which is arranged at the right rear part inside the main body case 21 and is fixed to the boss 29 with a screw 30 by a single shaft type in which the rotary shaft 28a is projected only forward. As shown in FIG. 3, the rotary shaft 28a is provided with a pin 31 as a first rotary engaging portion radially attached to the projecting base portion. Reference numeral 32 denotes an intake casing that constitutes the intake passage 33, and has a vent hole 34 on the rear surface thereof. The intake casing 32 is inserted and disposed in the right rear part inside the casing 21 and the motor 28 is provided at the center of the vent hole 34. It is located. The reference numeral 35 designates an intake fan, which has a central cylindrical portion 3
A slot-like groove 36 is provided as a first engaged portion corresponding to the pin 31 (first rotation engaging portion) at the rear end portion of the shaft 5a, and a second groove is provided at the front end portion of the shaft tubular portion 35a. Protrusions 37 are provided as rotational engagement portions so as to protrude on both sides in the radial direction. 38
Is an exhaust fan, and a central portion of the shaft tubular portion 38a has a second end corresponding to the projection 37 (second rotational engaging portion) at the rear end.
A groove 39 is provided as an engaged portion of the. 40 is the exhaust path 4
In the exhaust casing constituting part 1, the rear surface portion of the exhaust casing is a partition member 42, and the shaft tubular portion 38a of the exhaust fan 38 is simply inserted through the central portion thereof.
An opening 43 having a slightly larger diameter is formed.

Here, regarding the intake fan 35, the exhaust fan 37, and the exhaust casing 40, after the intake casing 32 is inserted into the main body case 21, first, the intake fan 35 is advanced from the front side so that the shaft cylinder portion 35a is connected to the motor 28. Rotating shaft 28
The groove 36 is engaged with the pin 31. Next, the exhaust casing 40 is also advanced from the front to fit the opening portion 43 into the shaft tubular portion 35a of the intake fan 35,
The partition member 42 is applied to the intake casing 32, and is screwed 45 to the boss 44 in the main body case 21. Thus, the exhaust casing 40 and the intake casing 32 are fixed, and then the exhaust fan 38 is further advanced from the front,
The shaft tubular portion 38a is fitted into the shaft tubular portion 35a of the intake fan 35 and also fitted into the opening 43 of the exhaust casing 40 (partitioning member 42), and the groove 39 is engaged with the projection 37. As a result, the shaft cylinder portion 38a of the exhaust fan 38, in other words, the engaging connection portion of the intake fan 35 and the exhaust fan 38 by the projection 37 and the groove 39 is provided in the opening 43 of the exhaust casing 40 (partitioning member 42). It has been passed through,
An intake fan 35 is provided in the intake casing 32 (intake passage 33).
Is located, and the exhaust fan 38 is located in the exhaust casing 40 (exhaust path 41). A set screw 46 is screwed into the tip of the rotary shaft 28a of the motor 28 to prevent the exhaust fan 38 and the intake fan 35 from coming off.

Now, in the case of the configuration as described above, when the motor 28 is started, the intake fan 35 is rotated through the engagement structure of the pin 31 and the groove 36, and at the same time, the engagement structure of the projection 37 and the groove 39 is formed. Through this, the exhaust fan 38 is rotated. Then, due to the rotation of the intake fan 35, the outdoor air behind the main body case 21 is sucked into the main body case 21 from the outdoor air intake port 24 through the intake passage 26a of the intake / exhaust duct 26, and is sucked from the ventilation port 34. Casing 32
After entering the inside, it further passes through the heat exchanger 27 and is supplied to the room in front of the main body case 21 from the indoor air discharge port 23. On the other hand, by the rotation of the exhaust fan 38, the air in the room is sucked into the main body case 21 from the indoor air intake port 22, enters the exhaust casing 40, and further passes through the heat exchanger 27.
The air is discharged from the indoor air discharge port 25 to the outside through the exhaust passage 26b of the intake / exhaust duct 26.

In the configuration that functions as described above, the intake fan 35 and the exhaust fan 38 can be assembled by sequentially advancing in one direction only relative to the motor 28 as described above. There is no need for troublesome things like assembling, and wiring processing for the motor 28, such as the inner back surface 21a of the main body case 21, is essentially both fans 3.
Since it can be formed at a position not facing 5, 37, it does not need to be as robust as a conventional one that must be mounted at a position facing a fan, and as a whole, assembling can be surely facilitated. Further, the partition member 42 for partitioning the two fans 35, 38 has a small opening 4 for allowing the engagement connecting portion formed by the projection 37 and the groove 39 of the two fans 35, 38 to pass therethrough.
3 is sufficient, and there is also a place far from the blades of the fans 35 and 38, so that it is possible to reduce the mixing of intake air and exhaust gas, and it is possible to reliably improve the ventilation efficiency. it can.

The arrangement of the fans 35 and 38 in the above configuration may be reversed. Further, the pin 31 and the groove 36, and the protrusion 37 and the groove 3
The concave-convex relationship between the first rotary engaging portion and the first engaged portion and the second rotary engaging portion and the second engaged portion illustrated in 9 may be reversed, or other than that. It may be in the form.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be implemented with appropriate modifications without departing from the scope of the invention.

[Effect of the Invention] As is clear from the above description, in the simultaneous intake / exhaust type ventilation fan of the present invention, the intake fan located in the intake passage and the exhaust fan located in the exhaust passage are rotationally driven by a single-axis single motor. And a first engaged portion to be engaged with a first rotary engaging portion provided on the rotation shaft of the motor is provided at the center of one of the two fans. And a second rotary engaging portion is provided, and a second engaged portion engaged with the second rotary engaging portion is provided at the center of the other fan,
It is characterized in that it is partitioned between both fans by a partition member having an opening through which the engaging and connecting portions thereof are passed, thereby facilitating the assembly and mixing the intake air and the exhaust air. It is possible to reduce the amount of air pollution, and thus to achieve the improvement of ventilation efficiency, which is an excellent practical effect.

[Brief description of drawings]

1 to 3 show an embodiment in which the present invention is applied to an air conditioning ventilation fan. FIG. 1 is an overall cross sectional plan view, FIG. 2 is an overall perspective view, and FIG. 3 is a main part. FIG. Further, FIG. 4 is a cutaway plan view of a half of a conventional one, and FIG. 5 is a cutaway plan view of a half of a different conventional one. In the drawings, 28 is a motor, 28a is a rotary shaft, 31 is a pin (first rotary engaging portion), 32 is an intake passage, 35 is an intake fan, 36 is a groove (first engaged portion), and 37 is A protrusion (second rotation engaging portion), 38 is an exhaust fan, 39 is a groove (second engaged portion), 41 is an exhaust passage, 42 is a partition member, and 43 is an opening.

Claims (1)

[Scope of utility model registration request] 1. An intake fan in an intake passage and an exhaust fan in an exhaust passage, both of which are rotationally driven by a single shaft type single motor, and one of the two fans is provided. The first engaged portion to be engaged with the first rotational engaging portion provided on the rotary shaft of the motor is provided in the central portion of the fan, and the second rotational engaging portion is provided. A second engaged portion to be engaged with the second rotary engaging portion is provided in the central portion, and is partitioned by a partition member having an opening for allowing the engagement connecting portion to pass between the two fans. Simultaneous intake and exhaust type ventilation fan characterized by consisting of.