JPH0854128A - Ventilator for air conditioner and executing method therefor - Google Patents

Abstract

PURPOSE:To sufficiently obtain the atmosphere introducing amount while suppressing an air current sound upon introducing of the atmosphere with a simple structure. CONSTITUTION:An air conditioner ventilates a room by introducing the outdoor air in an air conditioner casing via a ventilating duct disposed in a garret space. A connecting chamber 8 for reducing an air current sound is provided at the downstream end of the duct. A cylindrical sound absorbing member 9 for varying a channel diameter is detachably provided at the connecting tube 8b of the chamber 8 to alter the detached state of the member 9 in response to the capacity of the conditioner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator for an air conditioner and a method for constructing the ventilator, and more particularly to an air conditioner casing in which outdoor air is taken in by a ventilation duct. , Measures to reduce outside air intake noise while ensuring a sufficient amount of outside air intake.

[0002]

2. Description of the Related Art Conventionally, as one type of a ceiling-embedded air conditioner, for example, as disclosed in Japanese Utility Model Laid-Open No. 3-73835, air conditioning is performed by a ventilation duct provided in a space above the ceiling. It is known that the outside of the room is taken into the machine casing to ventilate the room. That is, the upstream side of the ventilation duct is opened to the outside of the room, the downstream side is opened to the inside of the air conditioner casing, and a duct fan is arranged in the middle of this ventilation duct. The outdoor air is introduced into the air conditioner casing through the ventilation duct.

Further, in recent years, air conditioners have been designed to reduce the driving noise of motors, the suction noise of indoor air from the suction port, the blowing noise of conditioned air from the air outlet, and the like. The driving noise is getting quieter.

[0004]

By the way, in the air conditioner having the ventilation duct as described above, when a large amount of outside air is introduced without increasing the duct diameter, the air is circulated in the ventilation duct. The flow velocity of the generated air becomes high, and the airflow noise becomes loud at the blowout portion from the duct into the air conditioner casing. Therefore, the noise radiated from the air conditioner into the room becomes large, and the air conditioner itself is set to have a low operating noise, but the airflow sound accompanying the introduction of the outside air makes the air conditioner quiet. There is a problem that is blocked.

Further, if the duct fan connected to the ventilation duct has a small capacity, the air flow noise accompanying the introduction of the outside air can be set to a low level, but this does not sufficiently introduce the outside air. There is a possibility that it may not be possible to obtain sufficient room ventilation, and in particular, for a large-sized air conditioner, ventilation in the room cannot be performed sufficiently.

It is also conceivable that a duct fan is provided with a large capacity and a damper is provided in the flow passage for the outside air, and the amount of the outside air introduced is adjusted by the opening degree of the damper. It causes complication.

The present invention has been made in view of these points, and it is an object of the present invention to obtain a sufficient introduction amount of outside air with a simple structure while suppressing air flow noise accompanying introduction of outside air. .

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 makes the area of the passage for introducing the outside air variable so that the optimum outside air introduction amount and air flow noise can be reduced. It became possible to obtain the suppression function. Specifically, the air conditioner casing (2), a ventilation duct (6) having one end open to the outside and the other end communicating with the air conditioner casing (2), and the air outside the room are used as the ventilation duct. (6)
It is premised on a ventilation device for an air conditioner equipped with a duct fan (7) introduced into the air conditioner casing (2) via the air conditioner. A connection chamber (8) for introducing the outside air flowing through the ventilation duct (6) into the air conditioner casing (2) is provided at the air circulation downstream end of the ventilation duct (6). Also, connect the duct fan (7) to the connecting chamber.
A sound absorbing member (9) having an opening (9a) for circulation of the outside air is detachably provided in the outside air passage extending over (8), and the sound absorbing member (9)
Is removed from the outside airflow passage in an air conditioner having a large conditioned air blowing capacity, and is attached to the outside airflow passage in an air conditioning machine having a small conditioned air blowing capacity.

According to a second aspect of the present invention, in the ventilation device for an air conditioner according to the first aspect, a cylindrical connecting pipe is provided at a connecting portion of the connecting chamber (8) with the ventilation duct (6).
(8b) is provided, and the sound absorbing member (9) is formed into a cylindrical shape that can be attached to and detached from the inside of the connecting pipe (8b).

The invention according to claim 3 is an air conditioner casing.
(2), the ventilation duct (6) having one end open to the outside and the other end communicating with the air conditioner casing (2), and the air outside the room through the ventilation duct (6). casing
(2) It is premised on an air conditioner ventilation device equipped with a duct fan (7) to be introduced inside. Then, branch pipes (11c), (14) for branching the introduced outside air into a plurality of flow passages are provided at the air circulation downstream end of the ventilation duct (6), and the branch pipes (11c), (14 The connection chambers (15) and (16) for introducing the outside air flowing through the branch pipes (11c) and (14) into the air conditioner casing (2) are provided at the branch downstream end of ().

According to a fourth aspect of the invention, in the air conditioner ventilation device according to the third aspect, the branch pipe (14) and the ventilation duct (6) are separable, and the connection chambers (15), ( 16)
Is separated from the air conditioner casing (2).

The invention according to claim 5 is a duct fan (7).
To ventilate outdoor air through a duct (6) and connecting chamber
A method for constructing a ventilation device for an air conditioner to be introduced into the air conditioner casing (2) via (8), which comprises the steps of connecting the ventilation duct (6) and the connection chamber (8): The sound absorbing member (9) having the opening (9a) for outside air circulation is attached and detached to and from the outside airflow passage extending from the duct fan (7) to the connection chamber (8). , Sound-absorbing member (9) for air conditioners with small conditioned air blowing capacity
The sound absorbing member (9) is removed in the case of an air conditioner with a large air-conditioning air blowing capacity.

[0013]

With the above construction, the present invention provides the following actions. In the inventions according to claims 1 and 5,
When ventilating the room, the outdoor air was introduced into the ventilation duct (6) and the connection chamber (8) along with the drive of the duct fan (7), and the air flow noise was reduced inside the connection chamber (8). After that, it is supplied from the indoor unit casing (2) toward the room.

Also, from the duct fan (7) to the connection chamber
Sound absorbing member (9) that can be freely attached to and detached from the outside air passage over (8)
The detachable state is set according to the capacity of the air conditioner. In other words, in the case of an air conditioner with a large air-conditioning air blowing capacity, the sound absorbing member (9) is removed to secure a large air flow passage, and the air flow rate is maintained at a relatively low speed to provide ventilation in the room. Introduce a sufficient amount of outside air into the air conditioner casing (2). Conversely, in the case of an air conditioner that has a small capacity to blow out conditioned air, the sound absorption member (9) is installed to set the air flow passage to a small size and set the amount of outside air introduced according to the capacity. At the same time, the sound absorbing member (9) absorbs the airflow sound of the air to maintain the quietness of the air conditioner.

According to the second aspect of the invention, the sound absorbing member (9) is attached / detached to / from the connecting pipe (8b) of the connecting chamber (8). As a result, the sound absorbing member (9) can be attached and detached with a simple operation.

According to the third aspect of the invention, when the room is ventilated, the outside air is introduced from the ventilation duct (6) into the branch pipes (11c) and (14), and the outside air is branched into the branch pipes (11c) and (14). After being divided into a plurality of introduction paths in 14), it is guided to the connection chambers (15), (16), and the airflow noise is reduced in the connection chambers (15), (16) while the indoor unit casing (2) It is introduced from multiple locations inside and supplied toward the room. For this reason, it is possible to obtain a sufficient amount of introduced outside air while setting the flow velocity of outside air in each part to be low, and to sufficiently ventilate the room while suppressing airflow noise accompanying the introduction of outside air.

In the invention according to claim 4, the branch pipes (11c), (1
4), the connection chambers (15), (16) can be easily replaced, and the members (14), (15), (16) can be changed to other shapes, so that the outside air can be introduced. The degree of freedom of system layout is increased.

[0018]

【Example】

(First Embodiment) Next, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an arrangement state of a ceiling-embedded air conditioner (1) according to this example. This air conditioner
(1) is under the air conditioner casing (2) in which the hanging fittings (A), (A) are hooked on the hanging bolts (B), (B) in the space above the ceiling (S) and are suspended and supported. A decorative panel (3) is placed on the side. Further, in the air conditioner casing (2), an air filter, a turbo fan, a heat exchanger and the like (not shown) are sequentially arranged and housed in the air circulation direction. An air inlet (not shown) is formed at the center of the decorative panel (3), and air outlets are formed at a plurality of side edge portions. As a result, during operation of the air conditioner (1), the air in the room (R) sucked from the air suction port as the turbofan rotated passed through the air filter and heat exchanger to be purified and temperature-controlled. After that, the air is blown out from the air outlet.

Further, the air conditioner (1) is provided with an outside air introduction unit (4) as a ventilation device for introducing outside air into the air conditioner casing (2) in order to ventilate the room (R). . The outside air introduction unit (4) includes a chamber casing (5) interposed between the air conditioner casing (2) and the decorative panel (3), and a ventilation duct (6).
The upstream side of the ventilation duct (6) extends toward the outside of the room, and the downstream side of the ventilation duct (6) extends toward the chamber casing (5) so that the outside air is introduced into the air conditioner casing (2). ing.

The ventilation duct (6) is composed of a bendable bellows-like pipe, and the upstream end has a space above the ceiling.
It has an opening on the wall of (S) to allow the intake of outside air. Also, in the middle of this ventilation duct (6),
A duct fan (7) for introducing outside air into the chamber (6) and supplying it to the chamber casing (5) is provided.
The downstream end of the ventilation duct (6) is connected to the chamber casing (5) via a connection chamber (8) which is a characteristic member of this example. The connection chamber (8) will be described below.

As shown in FIG. 2, the connection chamber (8) is a hollow box body, and one side surface (8a) has a central portion at the center thereof.
The upstream connecting pipe (8b) connected to the ventilation duct (6) is projected. Further, the other side surface (8c) extending in a direction orthogonal to the one side surface (8a) on which the upstream side connecting pipe (8b) is projectingly provided.
A downstream side connecting pipe (8d) connected to the chamber casing (5) is projectingly provided at the lower end portion of the. In other words, this connection chamber (8) introduces the outside air introduced by the ventilation duct (6) into the chamber internal space (8e) by the upstream side connection pipe (8b) and then the chamber by the downstream side connection pipe (8d). casing
It is designed to be fed into the air conditioner casing (2) via (5).

The connecting chamber (8) is characterized in that the connecting chamber (8) is provided with a cylindrical sound absorbing member (9) which is detachably attached to the upstream connecting pipe (8b).
This sound absorbing member (9) has an outer diameter dimension (t1) of the upstream side connecting pipe (8b).
And the length dimension (t2) also substantially match the length dimension of the upstream side connecting pipe (8b). Therefore, the sound absorbing member (9) is attached by being fitted into the upstream side connecting pipe (8b). Due to this structure, the upstream connecting pipe (8b) of the connecting chamber (8)
With the sound absorbing member (9) attached to the
In the state where the sound absorbing member (9) is removed from the upstream connection pipe (8b) of the connection chamber (8) while the air flow passage in (8b) is set small, the upstream connection pipe (8b) is removed. The air flow passage in is set to be large.

Next, the outside air introducing operation by the outside air introducing unit (4) will be described. This outside air introduction unit
When ventilating the room by (4), use a duct fan.
(7) is driven, and outside air is introduced from the upstream end of the ventilation duct (6), and this outside air flows upstream from the downstream end of the ventilation duct (6) into the chamber internal space (8e) of the connection chamber (8). It is introduced via the side connecting pipe (8b). Then, the introduced airflow sound is attenuated and silenced in the chamber internal space (8e), and then enters the air conditioner casing (2) from the downstream connecting pipe (8d) through the chamber casing (5). be introduced.
Further, this air is mixed with the room air sucked from the air suction port of the decorative panel (3), the temperature is adjusted by the heat exchanger, and then the air is blown toward the room from the air blowing port. As a result, fresh air is mixed in the conditioned air blown out from the air conditioner (1), and the air is ventilated in the room.

A feature of this embodiment is that the sound absorbing member (9) is attached or detached according to the capacity of the air conditioner (1). In other words, an air conditioner with a relatively large capacity (1)
If the outside air introduction unit (4) is attached to the upstream side connection pipe (8b), remove the sound absorbing member (9).
A large inner diameter dimension of the air circulation space is ensured so that a sufficient amount of outside air for indoor ventilation is introduced into the air conditioner casing (2) while maintaining a relatively low flow velocity of air. In order to obtain such operation, the capacity of the duct fan (7) and the diameter of the ventilation duct (6) should be sufficient to obtain the amount of outside air required by the air conditioner (1) having a large capacity. Is set to be able to.

On the other hand, an air conditioner having a relatively small capacity
When the outside air introduction unit (4) is installed in (1), connect the sound absorbing member (9) to the upstream side connecting pipe (8) of the connecting chamber (8).
By installing inside the b), the inner diameter of the air flow space in the upstream side connecting pipe (8b) is set to be small to increase the flow resistance, and the sound absorption while setting the outside air introduction amount according to the capacity. The air flow sound of the air is absorbed by the member (9),
Maintain the quietness of the air conditioner.

As described above, according to the structure of this embodiment, the inner diameter of the upstream connecting pipe (8b) is variable with respect to the connecting chamber (8) having the function of silencing the air flow sound generated by the introduction of the outside air. Since the sound absorbing member (9) is installed and the sound absorbing member (9) is attached and detached to change the diameter of the outside air introduction passage to change the circulation resistance of the outside air, the capacity of the air conditioner (1) is reduced. Accordingly, it is possible to obtain a configuration in which the outside air introduction amount is appropriately set while easily suppressing noise.

An air conditioner having a relatively large capacity
Even if the outside air introduction unit (4) is installed in (1), if there is a demand to obtain sufficient quietness of the air conditioner (1), install the sound absorbing member (9) and, conversely, compare Even if the outside air introduction unit (4) is installed in the air conditioner (1) having a small physical capacity, the sound absorbing member (9) may be removed if a large amount of outside air is required to be secured. Good.

(Second Embodiment) Next, a second embodiment of the present invention will be described. The present example is a modification of the connection chamber and its peripheral portion, and the other configurations are similar to those of the above-described first embodiment, so only the characteristic configuration will be described here.

As shown in FIG. 3, an outside air branching member (11) is provided at the downstream end of the ventilation duct (6), and this outside air branching member (11) is one introduction pipe (11a). And two outlet tubes (1
1b) and (11b) are provided. That is, the introduction pipe (11a) is provided on the side surface of the hollow branch member main body (11c) as a branch pipe at the substantially central portion in the longitudinal direction, while the outlet pipe (11b) is provided at both ends in the longitudinal direction. Connection chamber with (11b) (1
5) and (16) are provided. In addition, this outlet pipe (11b), (1
The opening direction of 1b) is set to a direction slightly inclined toward the longitudinal center of the branch member body (11c).

Then, as shown in FIG. 4, when the outside air branching member (11) is attached to the chamber casing (5) (the opening of the outlet pipe is shown by a broken line), the outlet pipe (11b) is connected to the chamber. The chamber casing is connected to two corners of the casing (5) respectively, and the chamber casing is connected to each of these corners.
It is designed to be introduced into the air conditioner casing (2) via (5).

Further, at the lower end portion of the branch member body (11c), a portion opposite to the disposition position of the outlet pipe (11b) is formed with a recessed portion (11d) which is slightly recessed, Field rims and field rim holders provided behind the ceiling to support the ceiling (12)
Interference with the like (see the phantom line in FIG. 4) is avoided. That is, the outside air branching member (11) can be arranged without being restricted by the presence of a field edge or the like.

As described above, in this example, the outside air introduced from the introduction pipe (11a) is divided into two supply passages in the branch member body (11c), and the outlet pipes (11b), ( 11
Since it is introduced into the chamber casing (5) from b), it is possible to obtain a sufficient amount of introduced outside air while setting the flow velocity of outside air at the outlet of each outlet pipe (11b), (11b) relatively low. As a result, it is possible to sufficiently ventilate the room (R) while suppressing the air flow noise that accompanies the introduction of outside air.

Also in the structure of this embodiment, it is possible to provide a removable sound absorbing member (not shown) as in the first embodiment described above. Specifically, a cylindrical sound absorbing member mounted inside the introducing pipe (11a) is adopted,
The sound absorbing member is attached or detached according to the capability of the air conditioner (1).

(Third Embodiment) Next, a third embodiment of the present invention will be described. This example is a modification of the second embodiment described above.

As shown in FIG. 5, the outside air branching member (1
3) is composed of a T-shaped tube (14) as a branch tube and a pair of left and right connection chambers (15), (16). Explaining each of these members, the T-shaped tube (14) is a cylindrical tube connected in a T-shape. That is, the introduction pipe (14b) is connected to the central portion in the longitudinal direction of the branch pipe portion (14a). Further, the connection chambers (15) and (16) are members symmetrical to each other, and like the connection chamber of the first embodiment described above,
Upstream connecting pipes (15a), (16a) and downstream connecting pipes (15b), (16b)
It has and. Then, as shown in FIG. 6, the introduction pipe (1
4b) is connected to the downstream end of the ventilation duct (6), and the upstream side connecting pipes (15a), (16a) are connected to both ends of the branch pipe part (14a) in the longitudinal direction, and the downstream side Connection pipe (15b), (16b)
Are respectively connected to two corners of the chamber casing (5). As a result, the outside air introduced from the ventilation duct (6) will not flow into the T-tube (14) and each connection chamber (1).
After passing through 5) and (16), they are introduced into the air conditioner casing (2) from each corner through the chamber casing (5).

As described above, also in this example, the introduction pipe (14) is passed through the ventilation duct (6) as in the second embodiment described above.
The outside air introduced from b) is divided into two supply passages,
Since they are introduced into the chamber casing (5) from the connection chambers (15), (16) provided at the respective locations, the downstream side connecting pipes (15b), (16) of each connection chamber (15), (16) It is possible to obtain a sufficient amount of introduced outside air while setting a low flow velocity of outside air at the exit part of 16b), and to sufficiently ventilate the room (R) while suppressing the air flow noise accompanying the introduction of outside air. .
Further, in the configuration of this example, since the outside air branching member (13) is configured by the three members of the T-shaped tube (14) and the pair of left and right connection chambers (15), (16), each member (14), It is easy to replace (15) and (16). Especially, there is a structure provided in the space above the ceiling such as a pillar (P) at the position shown in FIG.
If it is difficult to place the T-shaped tube (14) in the L-shaped elbow (1
Instead of 7), the outside air can be introduced only from one side of the connection chamber (15), and the flexibility of the piping layout of the outside air introduction system can be increased.

Further, also in the configuration of this example, the connection chamber
It is possible to provide a sound absorbing member (not shown) that is removable with respect to (11).

In each of the embodiments, the ceiling-embedded air conditioner has been described, but the present invention is not limited to this and can be applied to other air conditioners such as a floor-standing type. is there.

[0039]

As described above, according to the present invention, the following effects are exhibited. According to the first and fifth aspects of the invention, the sound absorbing member having the opening for circulation of the outside air is detachably attached to the outside airflow passage extending from the duct fan to the connection chamber, so that the capacity of the air conditioner is large. In this case, the sound absorbing member should be removed to secure a large air flow passage, and the amount of outside air sufficient for ventilation in the room should be introduced into the air conditioner casing while maintaining a relatively low air flow rate. When the capacity of the machine is small, a sound absorbing member is installed to set the air flow passage to a small size, and while the amount of outside air introduced is set according to the capacity, the sound absorbing member absorbs the air flow sound and the air conditioner Can maintain the quietness of
The amount of outside air introduced can be appropriately set while easily muting according to the capacity of the air conditioner. In other words, with a simple configuration, it is possible to obtain a sufficient amount of outside air to be introduced while suppressing air flow noise accompanying the introduction of outside air.

According to the second aspect of the invention, since the cylindrical sound absorbing member is detachably provided in the inside of the cylindrical connecting pipe provided in the connecting portion of the connecting chamber with the ventilation duct, The sound absorbing member can be attached and detached with a simple operation,
Workability can be improved.

According to the third aspect of the present invention, after the outside air flowing through the ventilation duct is divided into a plurality of branch passages and then introduced from each connection chamber toward the inside of the air conditioner casing, each portion is arranged. It is possible to obtain a sufficient amount of introduced outside air while setting a low flow velocity of outside air in the room, and to sufficiently ventilate the room while suppressing air flow noise accompanying introduction of outside air.

According to the fourth aspect of the present invention, the branch pipe and each connection chamber can be easily replaced, and the members can be changed to other shapes. Therefore, the layout of the outside air introduction system can be changed. The degree of freedom of can be increased.

[Brief description of drawings]

FIG. 1 is a diagram showing an arrangement state of a ceiling-embedded air conditioner according to an embodiment.

FIG. 2 is a perspective view of a connection chamber in the first embodiment.

FIG. 3 is a perspective view of an outside air branching member according to a second embodiment.

FIG. 4 is a diagram showing a state in which an outside air branching member of the second embodiment is attached to an air conditioner.

FIG. 5 is an exploded perspective view of an outside air branching member according to a third embodiment.

FIG. 6 is a cross-sectional view showing a state where the outside air branching member of the third embodiment is attached to an air conditioner.

FIG. 7 is a view corresponding to FIG. 6, showing a case where the T-shaped tube is replaced with an elbow.

[Explanation of symbols]

 (2) Air conditioner casing (6) Ventilation duct (7) Duct fan (8) Connection chamber (8b) Upstream connection pipe (9) Sound absorbing member (9a) Opening (11c) Branch member body (branch pipe) (14 ) T-shaped pipe (branch pipe) (15), (16) Connection chamber

Claims (5)

[Claims] 1. An air conditioner casing (2), one end of which is open to the outside, and the other end of which is the air conditioner casing.
An air conditioner equipped with a ventilation duct (6) communicating with (2) and a duct fan (7) for introducing outdoor air into the air conditioner casing (2) through the ventilation duct (6). In the ventilation device of the machine, the outside air that has circulated in the ventilation duct (6) is provided at the downstream end of the ventilation duct (6) where the air flows.
There is a connection chamber (8) introduced inward, and the outside airflow passage extending from the duct fan (7) to the connection chamber (8) has an opening (9a) for outside air circulation formed therein. The member (9) is detachably installed, and the sound absorbing member (9) is removed from the outside airflow passage in the case of an air conditioner having a large air-conditioning air blowing capacity, and has a small air-conditioning air blowing capacity. The air conditioner ventilation device is characterized in that it is attached to the outside airflow passage. 2. Ventilation duct in the connection chamber (8)
A cylindrical connecting pipe (8b) is provided at the connecting portion with (6), and the sound absorbing member (9) is formed in a cylindrical shape that is detachable with respect to the inside of the connecting pipe (8b). The ventilation device for an air conditioner according to claim 1, wherein: 3. An air conditioner casing (2), one end of which is open to the outside, and the other end of which is the air conditioner casing.
An air conditioner equipped with a ventilation duct (6) communicating with (2) and a duct fan (7) for introducing outdoor air into the air conditioner casing (2) through the ventilation duct (6). In the ventilation device of the machine, at the downstream end of the ventilation duct (6) in the air flow, there are branch pipes (11c), (14) for branching the introduced outside air into a plurality of flow passages.
Are provided, the branch pipe (11c), (14) at the branch downstream end of the branch pipe (11c),
A ventilation device for an air conditioner, characterized in that it is provided with connection chambers (15), (16) for introducing the outside air flowing through (14) into an air conditioner casing (2). 4. The branch pipe (14) and the ventilation duct (6) are separable, and the connection chambers (15) and (16) are separable from the air conditioner casing (2). The ventilation device for an air conditioner according to claim 3, wherein 5. A method for constructing a ventilation device for an air conditioner, which allows outdoor air to be introduced into an air conditioner casing (2) through a ventilation duct (6) and a connection chamber (8) by a duct fan (7). The sound absorbing member (9) having the opening (9a) for outside air flow formed before the step of connecting the ventilation duct (6) and the connection chamber (8).
Is attached to and detached from the duct fan (7) to the outside air passage extending from the connection chamber (8), and in the attaching and detaching step, in the case of an air conditioner having a small conditioned air blowing capacity, a sound absorbing member ( A method for constructing a ventilation device, characterized in that the sound absorbing member (9) is removed in the case of an air conditioner equipped with 9) and having a large blowing capacity of conditioned air.