JPH0894141A - Air conditioning ventilating fan - Google Patents

Abstract

PURPOSE: To quickly exhaust by communicating the indoor side with the suction surface side of a suction fan via a bypass passage, and blocking an outdoor air intake channel by a channel switching shutter to introduce the air fed from the fan to the outdoor. CONSTITUTION: When a fan motor 2 is driven in the state that an outdoor shutter 7 is closed to close an outdoor air intake port 5 and a channel switching shutter 9 is closed to close an outdoor air intake channel 8, the indoor air is introduced into a machine via a bypass passage 15 by a suction fan 3. The indoor air introduced into the machine from the passage 15 is exhausted to the outdoor. The indoor air is also introduced as usual into the machine by a ventilating fan 4, and also diffused to the outdoor as usual via an indoor air exhaust channel 12. Accordingly, two fans 3, 4 driven by one fan motor 2 are operated together as exhaust fans. Thus, the quick exhausting can be conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention discharges dirty air in a room to the outside and takes in fresh air into the room.
At this time, the present invention relates to an air-conditioning ventilation fan that reduces heat and cooling energy loss by causing heat exchange between outside air and indoor air.

[0002]

2. Description of the Related Art In a heat exchanger for performing heat exchange by intersecting air having different temperatures so as not to mix with each other, the heat exchange time becomes shorter as the flow velocity of air passing therethrough becomes faster. In addition, the heat exchange rate is lowered. Since a conventional general air-conditioning ventilation fan is configured to support normal ventilation in a specified volume, a large air volume required when indoor air is extremely dirty, for example, when several people smoke at the same time. There was a drawback that it could not support the ventilation of.

Therefore, like the air-conditioning ventilation fan of Japanese Patent Publication No. 3-35588 (International classification: F24F 7/08), a fan that takes in outside air into the machine, a fan that takes in indoor air into the machine, and a fan motor that drives them. In addition to the air-blowing mechanism consisting of, a fan-only air-exhausting mechanism including a fan dedicated to exhaust and a fan motor has been proposed. In addition, it is also possible to increase the total air volume without enlarging the width of the fan or increasing the diameter of the fan to increase the flow velocity per unit time in order to cope with the ventilation of a large air volume.

[0004]

However, the air-conditioning ventilating fan is not provided because the cost is relatively high and the installation space must be secured if the air-blowing mechanism dedicated to the exhaust gas is provided as in the above-mentioned prior art. There is a problem of increasing the size. Moreover, when the diameter of the fan is increased, the size of the air conditioning ventilation fan also increases.

In view of the above circumstances, it is an object of the present invention to provide an air-conditioning ventilation fan capable of quick exhaust without increasing the size thereof by using an existing blowing mechanism composed of one fan motor and two fans. .

[0006]

The air-conditioning ventilation fan of the present invention comprises:
In order to solve the above problems, an outside air shutter that opens and closes an outside air intake port that takes in outside air into the machine, a first fan that takes outside air into the machine, and a second fan that takes in room air into the machine
, A fan motor that drives the fans at the same time, an outside air intake passage that guides the outside air taken into the machine to the room, an indoor air discharge passage that guides the room air taken into the machine to the outside, and the above-mentioned outside air An air-conditioning ventilation fan provided at the intersection of an intake flow path and an indoor air discharge flow path, the heat exchanger performing heat exchange between outside air and indoor air, the intake air of the indoor side and the first fan. A bypass passage that communicates with the surface side and a passage switching shutter that blocks the outside air intake passage and guides the air sent from the first fan to the outside are provided.

In the first construction, the outside air outlet of the outside air intake passage may also be used as the indoor air intake of the bypass passage.

Further, in the above first or second configuration,
The closing of the outside air intake port by the outside air shutter and the closing of the outside air intake passage by the passage switching shutter may be performed simultaneously by one actuator.

In any one of the first to third configurations, the bypass passage may be provided with a wind pressure shutter for preventing air from flowing into the bypass passage from the first fan side.

[0010]

According to the first configuration described above, the following actions are achieved.

(In normal operation) The one fan motor is driven in a state where the outside air shutter is opened to open the outside air intake port, and the passage switching shutter is opened to open the outside air intake passage. Then, while the outside air is taken into the aircraft from the outside air intake port by the first fan,
Room air is taken into the machine from the room side by the second fan. The outside air taken into the machine passes through the outside air intake flow path, and the indoor air taken into the machine passes through the indoor air discharge flow path, and heat exchange is performed when passing through each heat exchanger. After the heat exchange, the outside air is blown into the room and the indoor air is blown outside the room.

(During rapid exhaustion) The one fan motor is driven in a state where the outside air shutter is closed to close the outside air intake port, and the passage switching shutter is closed to close the outside air intake passage. Then, since the outside air shutter closes the outside air intake port, the indoor air is taken into the machine through the bypass passage by the first fan. Then, the indoor air taken into the machine from the bypass passage is discharged to the outside because the passage switching shutter closes the outside air intake passage. Of course, the second
The room air is also taken into the machine as usual by this fan, and this room air is also blown out to the outside through the room air discharge flow path as usual, so both fans driven by one fan motor exhaust the air. It will operate as a fan for the vehicle, and rapid exhaust will be realized.

As described above, rapid exhaust is performed by using the existing air blowing mechanism composed of one fan motor and two fans, so that the disadvantage of high cost when the air blowing mechanism dedicated to exhaust is provided is eliminated.

Further, according to the second configuration, the outside air outlet of the outside air intake passage is also used as the indoor air intake of the bypass passage, so that the indoor air intake opening of the bypass passage is separately provided. The size can be reduced as compared with the case where it is provided in. Further, due to such a combined structure, a sufficient opening area can be provided to the outside air outlet of the outside air intake passage (indoor air intake of the bypass passage) to secure a sufficient air volume. Further, since it is not necessary to increase the rotation speed of the fan to secure the air volume, noise caused by increasing the rotation speed of the fan can be prevented.

Further, according to the third structure, since the outside air intake port is closed by the outside air shutter and the outside air intake passage is closed by the passage switching shutter at the same time, two actuators are used. The cost and size can be reduced as compared with the case where two actuators are provided to drive the shutters separately.

In the meantime, during the rapid exhaust, as described above, the indoor side and the intake surface side of the first fan communicate with each other by the bypass passage, and the air sent from the first fan by the flow path switching shutter. A flow path is formed to guide the air to the outside of the room. However, if this state is maintained even when the air conditioning ventilation fan is stopped, the outside air may flow into the room through the bypass passage.

According to the fourth structure, in the bypass path,
Since the wind pressure shutter for preventing the inflow of air from the first fan side into the bypass passage is provided, the inflow of outside air into the room is prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments.

FIGS. 1 and 2 are vertical side views showing a normal heat exchange ventilation operation state in the air conditioning ventilation fan of the present invention. In FIG. 1, the flow of outside air taken into the machine is
In Figure 2, the flow of indoor air taken into the aircraft is
Each is indicated by an arrow symbol. FIG. 4 is a rear view of the air conditioning ventilation fan as seen from the outside of the room. In FIG. 4, the cross section taken along the line AB-C-A 'is the cross section of FIG. The cross section taken along the line A-B'-C-C 'is the cross section of FIG.

A fan motor 2 is arranged substantially in the center of the machine frame 1 of the air-conditioning ventilation fan, and the rear end side (right side in the figure) of the rotary shaft 2a protruding forward and backward from the main body of the fan motor 2. Is the first for taking outside air into the cabin
Fan (hereinafter referred to as an intake fan) 3 and a second fan (hereinafter referred to as an exhaust fan) 4 for taking indoor air into the machine are fixed to the front end side (the left side in the drawing). The two fans 3 and 4 are simultaneously driven to rotate by the one fan motor 2.

An outside air intake port 5 for taking in outside air into the machine is formed in front of the intake surface side of the first fan 3. A ventilation cover 6 is provided on the outside air surface side of the outside air intake port 5 so as to cover it. The ventilation cover 6 has a large number of elongated ventilation holes 6a ... And the ventilation holes 6a.
This allows outside air to be taken into the aircraft while preventing the entry of rainwater.

Inside the outside air intake port 5 (on the back side of the ventilation cover 6), there is an outside air shutter 7 for closing the outside air intake port 5 from the outside air or for communicating the outside air intake port 5 with the outside air. It is provided. In FIGS. 1 and 2, the outside air shutter 7 is open, and the outside air can be taken into the machine. The opening / closing mechanism of the outside air shutter 7 will be described later in detail.

When the fan motor 2 rotates while the outside air shutter 7 is open, a negative pressure is generated on the intake surface of the intake fan 3, and as shown in FIG. It is sent out from the circumferential surface side of the intake fan 3 through the outside air intake port 5. The outside air sent out from the circumferential surface side of the intake fan 3 reaches the heat exchanger 10 through the outside air intake passage 8 and is blown out from the outside air outlet 11 to the inside of the room through the heat exchanger 10. .

The outside air intake passage 8 is provided with a passage switching shutter 9. The flow path switching shutter 9 blocks the outside air intake flow path 8 and guides the air sent from the intake fan 3 to the outside through the exhaust port 16 or the exhaust port 1
It is switched whether to close 6 and open the outside air intake passage 8.
In FIGS. 1 and 2, the flow passage switching shutter 9 is in a state in which the exhaust port 16 is closed and the outside air intake passage 8 is opened. The opening / closing mechanism of the flow path switching shutter 9 will be described later in detail together with the opening / closing mechanism of the outside air shutter 7.

The heat exchanger 10 is formed by alternately stacking partition plates and spacing plates (not shown) in multiple layers, and the flow path formed by a certain spacing plate is located above and below the spacing plate. It is formed so as to be orthogonal to the flow path formed by.
In the heat exchanger 10 arranged as shown in FIGS. 1 and 2, a part of the outside air intake flow path 8 is formed by a flow path extending from the lower side to the upper side in the drawing, and a flow path extending from the left side to the right direction in the drawing. This forms a part of the indoor air discharge path 12.

When the fan motor 2 rotates in the state of FIG. 1, a negative pressure is generated on the intake surface of the exhaust fan 4,
As shown in FIG. 3, the room air is taken into the machine through the heat exchanger 10 and sent out from the circumferential surface side of the exhaust fan 4. The room air sent from the circumferential surface side of the exhaust fan 4 passes through the room air exhaust flow path 12 and the exhaust port 13
Is blown out of the room.

A wind pressure shutter 14 is provided in the indoor air discharge passage 12. The wind pressure shutter 14 is rotatably supported by a shaft 14a and is in a suspended state (flow path 12).
It is not possible to rotate counterclockwise in the figure from the closed state), and prevents backflow of outside air from the exhaust port 13 during non-ventilation while rotating clockwise by wind pressure during ventilation. The indoor air discharge channel 12 is opened.

FIG. 3 is a sectional view taken along the line BB'-CA 'in FIG. 4, showing a rapid exhaust operation state of the air conditioning ventilation fan. In this rapid exhaust operation state, the outside air shutter 7 is closed and the outside air intake port 5 is shielded from the outside air. Further, the outside air intake passage 8 is closed by the passage switching shutter 9 and the exhaust port 16 is opened.

Reference numeral 15 in the drawing denotes a bypass passage that connects the indoor side and the intake surface (outside air intake port 5) side of the first fan. In the present embodiment, the outside air outlet 11 also serves as the indoor air intake in the bypass passage 15. Thus, since the outside air outlet 11 is also used as the indoor air intake port of the bypass passage, the size can be reduced as compared with the case where the indoor air intake port of the bypass passage 15 is provided separately. Further, due to such a combined structure, the outside air outlet 11
A sufficient opening area can be provided to (the indoor air intake of the bypass) to secure a sufficient air volume. Further, since it is not necessary to increase the rotation speed of the fan to secure the air volume, it is possible to prevent noise caused by increasing the rotation speed of the fan.

At the boundary between the bypass 15 and the outside air intake 5, wind pressure shutters 17, 17 are arranged. This is because the state of FIG. 3 is the rapid exhaust operation state,
This is because the air-conditioning ventilation fan is also in a stopped state, and it is necessary to prevent the outside air flowing from the exhaust port 16 from entering the room through the bypass passage 15 at the time of the stop. The wind pressure shutter 17 is rotatably supported by a shaft 17a and prevents backflow of outside air from the exhaust port 16 at the time of stop, while it is rotated by wind pressure during the rapid exhaust operation, and the bypass passage 15 is closed. Open.

When the fan motor 2 rotates in the state of FIG. 3, a negative pressure is generated on the intake surface of the intake fan 3. In this state, since the outside air intake port 5 is shielded from the outside air, air flows into the intake fan 3 from the bypass passage 15. That is, indoor air is taken in from the outside air outlet 11,
It enters the outside air intake port 5 through the bypass passage 15, is sucked into the intake fan 3, and is sent out from the circumferential surface side.
The indoor air sent from the circumferential surface side of the intake fan 3 is discharged through the exhaust port 16 by closing the outside air intake flow path 8 with the flow path switching shutter 9 and opening the exhaust port 16. It is blown out through the room.

Of course, even in this rapid exhaust condition, the indoor air is taken into the machine by the exhaust fan 4, and the indoor air taken into the machine is blown out of the room. That is, both of the two fans 3 and 4 perform the exhaust operation, so that the rapid exhaust that exhausts a large amount of indoor air to the outside is realized.

Next, the opening / closing mechanism of the outside air shutter 7 and the opening / closing mechanism of the flow path switching shutter 9 will be described with reference to FIGS. 5 and 6. FIG. 5 (a) shows a part of FIG. 1, and FIG. 5 (b) is a rear view of the air-conditioning ventilation fan corresponding to FIG. 5 (a). In addition, FIG. 6A shows a part of FIG. 2, and FIG. 6B is a rear view of the air conditioning ventilation fan corresponding to FIG.

The plurality of shield plates 7a, ..., Which constitute the outside air shutter 7, are respectively supported by the rotation side shafts of the eccentric shafts 7b ..
The oscillating side shafts of the eccentric shafts 7b ... Are connected to a sliding plate 7c provided slidably in the vertical direction, and the sliding plate 7c is shown in FIG.
If the sliding plate 7c slides downward as shown in FIG. 6,
The outside air shutter 7 is closed.

One end of the wire 21 has the above-mentioned sliding plate 7c.
The shutter motor (actuator) 22 is connected to the rotating shaft 22a at the other end of the shutter motor (actuator) 22 at a position eccentric from its rotation center. The wire 21 is passed through the tube 23. One end side of the tube 23 is arranged and fixed so as to move the wire 21 in a direction of pulling up the sliding plate 7c, and the other end side is arranged and fixed in the vicinity of the shutter motor 22. When the wire 21 is pulled downward by the rotation of the rotary shaft 22a of the shutter motor 22 (clockwise in the figure), the sliding plate 7c is pulled upward against the bias of the coil spring 24 described later. The coil spring 24 connected to the sliding plate 7c biases the sliding plate 7c so as to pull it down, and when the rotary shaft 22a of the shutter motor 22 rotates in the reverse direction (counterclockwise in the figure). Pull down the sliding plate 7c.

A coil spring 25 is provided at the lower end of the sliding plate 7c.
Is attached to the sliding plate 7 by the coil spring 25.
c is connected to one end of the link member 26. The link member 26 is formed in a substantially V shape, and is rotatably supported by a shaft 26a arranged at a substantially central portion thereof. A coil spring 27 is connected to the one end side of the link member 26, and the coil spring 27 biases the link member 26 clockwise in the drawing. Further, an elongated hole 26b is formed on the other end side of the link member 26.
The swing side shaft 28a of the eccentric shaft member 28 is engaged with 6a. The flow path switching shutter 9 is fitted on the rotation-side shaft 28b of the eccentric shaft member 28.

In the state shown in FIG. 5, the wire 21 is pulled downward by the shutter motor 22,
The sliding plate 7c is pulled upward against the bias of the coil spring 24. When the sliding plate 7c rises, the plurality of shield plates 7a forming the outside air shutter 7 rotate to maintain the horizontal state and the shutter opens. Further, the coil spring 25 is pulled up by the rise of the sliding plate 7c, and the link member 26 rotates counterclockwise in the figure against the bias of the coil spring 27. By the rotation of the link member 26,
The eccentric shaft member 28 rotates clockwise in the drawing, and the rotation-side shaft 28
The flow path switching shutter 9 rotates clockwise in the figure around b, and the exhaust port 16 is closed.

The flow path switching shutter 9 has the exhaust port 16
Even if the coil spring is closed and cannot be rotated anymore, the coil spring 2
Since 5 is stretched, the sliding plate 7c is allowed to rise further. This is because the rotation stroke amount from the position where the exhaust port 16 is closed by the flow path switching shutter 9 to the position where the outside air intake flow path 8 is closed corresponding to the vertical stroke amount of the sliding plate 7c must be secured. Although it does not occur, it is difficult to completely match the two stroke amounts due to dimensional errors and placement errors of members such as the sliding plate 7c. Therefore, the vertical stroke amount of the sliding plate 7c is set to be slightly larger than the rotational stroke amount of the flow path switching shutter 9, and the flow path switching shutter 9 is completely closed after the exhaust port 16 is closed. By adopting a structure that allows the sliding plate 7c to further rise due to the expansion of the coil spring 25, regardless of dimensional errors and arrangement errors of members such as the sliding plate 7c,
One shutter motor 22 realizes complete opening / closing operation of the two shutters 7 and 9.

In the state shown in FIG. 6, the motor 22 is rotating counterclockwise, and the sliding plate 7c moves the coil spring 2
It is pulled back to 4 and descends. Due to the lowering of the sliding plate 7c, a plurality of shielding plates 7 constituting the outside air shutter 7 are formed.
a ... Rotate to maintain the drooping state, and the shutter is closed. When the sliding plate 7c descends, the coil spring 27
The link member 26 rotates clockwise in the drawing by the urging of the eccentricity, the eccentric member 28 rotates counterclockwise in the drawing, and the flow path switching shutter 9 opens the exhaust port 16 and removes the outside air. The inlet channel 8 is closed.

As described above, the closing of the outside air intake port 5 by the outside air shutter 7 and the closing of the outside air intake passage 8 by the passage switching shutter 9 constitute one shutter motor 22.
Are performed simultaneously by two shutters 7, 9
The cost and the size can be reduced as compared with the case where two actuators are provided to drive the actuators separately.

FIG. 7 is a circuit diagram of the electric system of the air conditioning ventilation fan of the present invention. The power supplied to the fan motor 2 is controlled by the switch 30 that switches between “strong wind”, “weak wind”, “quick exhaust”, and “off”, and the drive control of the shutter motor 22 is linked with the switch 30. The switch 31 for performing the operation is activated. In this circuit diagram, the electric power of the fan motor 2 at the time of rapid exhaust is set higher than that at the time of strong wind, but it goes without saying that the electric power may be the same.

[0042]

As described above, according to the present invention, rapid exhaust is realized by using the existing blower mechanism consisting of one fan motor and two fans. It is possible to eliminate the drawbacks such as the size increase of the airframe and the cost increase when the diameter of the fan is increased.
Further, if the structure is such that the outside air outlet of the outside air intake passage is also used as the indoor air intake of the bypass passage, the size can be reduced as compared with the case where the indoor air intake opening of the bypass passage is provided separately. And so on. Further, if the configuration is such that the outside air intake port is closed by the outside air shutter and the outside air intake flow passage is closed by the flow passage switching shutter at the same time by one actuator, two actuators are required to drive each shutter separately. The cost and size can be reduced as compared with the case of including. Further, when the bypass passage is provided with a wind pressure shutter for preventing the inflow of air from the first fan side into the bypass passage, there is an effect that the inflow of outside air into the room can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an air-conditioning ventilation fan of the present invention (during normal operation).

FIG. 2 is a vertical cross-sectional side view of the air conditioning ventilation fan of the present invention (during normal operation).

FIG. 3 is a vertical side view of an air conditioning ventilation fan (during rapid ventilation) of the present invention.

FIG. 4 is an air conditioning ventilation fan of the present invention (when the outside air shutter is closed).
FIG.

5A and 5B show an air conditioning ventilation fan of the present invention (during normal operation), FIG. 5A is a vertical side view showing a part of FIG. 1, and FIG. It is a rear view corresponding to (a).

FIG. 6 is a view showing an air conditioning ventilation fan (during rapid ventilation) of the present invention, FIG. 6 (a) is a vertical sectional side view showing a part of FIG. 3, and FIG. It is a rear view corresponding to (a).

FIG. 7 is a circuit diagram of an electric system of the air conditioning ventilation fan of the present invention.

[Explanation of symbols]

 2 fan motor 3 first fan (intake fan) 4 second fan (exhaust fan) 5 outside air intake 7 outside air shutter 8 outside air intake passage 9 passage switching shutter 10 heat exchanger 11 outside air outlet 12 indoor Air discharge channel 15 Bypass channel 17 Wind pressure shutter 22 Motor (actuator)

Claims (4)

[Claims] 1. An outside air shutter for opening and closing an outside air intake port for taking in outside air, and a fan motor for simultaneously driving a first fan for taking in outside air into the machine and a second fan for taking in room air into the machine. , An outside air intake flow path that guides the outside air taken into the machine to the room, an indoor air discharge flow path that guides the room air taken into the machine to the outside, and the above-mentioned outside air intake path and the indoor air discharge flow path An air-conditioning ventilation fan provided at an intersection, comprising a heat exchanger for exchanging heat between outside air and room air, comprising: a bypass path communicating between the room side and the intake surface side of the first fan; An air-conditioning ventilation fan, comprising: a flow path switching shutter that closes the external air intake flow path to guide the air sent out from the first fan to the outside of the room. 2. The air conditioning ventilation fan according to claim 1, wherein the outside air outlet of the outside air intake passage is also used as the indoor air intake of the bypass passage. 3. An actuator for closing the outside air intake port by the outside air shutter and closing the outside air intake passage by the passage switching shutter at the same time. The air conditioning ventilation fan according to claim 1 or 2. 4. A wind pressure shutter for preventing air from flowing into the bypass passage from the first fan side is provided in the bypass passage. Air conditioning ventilation fan as described.