JP6448264B2 - Blowing device and suction device for air conditioning equipment - Google Patents

Description

  The present invention relates to a blowing device and a suction device for air conditioning equipment. Here, as the target air conditioning equipment, for example, an air conditioning equipment widely used in ships, one or a plurality of air conditioning devices and a large number of air conditioning spaces are connected via a branched air duct. A central type air conditioner that sends conditioned air to a large number of air-conditioned spaces, and an air conditioner that draws air from a large number of air-conditioned spaces through a blower duct to a processing device.

  A cargo ship such as a tanker or a bulk carrier, or a ship has a large number of rooms (chambers). Has been done. This is a kind of central air conditioning equipment, but one of the problems with this central air conditioning equipment is the problem of noise.

  Noise diffused in the living room includes vibration noise transmitted through the air duct, wind noise generated inside the air duct, and wind noise generated at the opening edge of the air outlet. The higher the flow velocity, the larger.

  Furthermore, since the air duct is made as thin as possible in terms of cost and space, the flow rate of the conditioned air in the central air conditioning equipment is a separate type air conditioner that sends air to the air conditioned space with a fan provided in the blower device In many cases, it is much faster than that, and as a result, wind noise is particularly problematic. In addition, the air ducts of central air-conditioning facilities have many locations where eddy currents are likely to occur, such as bending or branching and air flow adjustment dampers. The structure is easy to generate.

  And as a means for suppressing wind noise, Patent Document 1 discloses that an arc baffle plate is opposed to an air inflow port inside a blowout box body in which an air inflow port and an air outflow port are orthogonal to each other. The air volume is adjusted by changing the opening degree of the air passage formed by the baffle plate and the damper so that the arc-shaped damper that covers the baffle plate from behind is rotatably arranged. It is disclosed.

  Moreover, although it cannot be said that it is a measure against a wind noise, it is also performed that a box constituting the blowing device is made of a sound absorbing material (for example, Patent Document 2).

No. 2-333060 Utility Model Registration No. 3011486

  Although it is beneficial to arrange the sound absorbing material in the blowing device, since the conditioned air comes into contact with the sound absorbing material, it is necessary to consider wind noise when the conditioned air passes through the sound absorbing material. That is, the generation of wind noise from the sound absorbing material and its peripheral part should be suppressed as much as possible.

  However, in patent document 1, since the damper is arrange | positioned inside a box, when a conditioned air passes a damper, there exists a possibility that a strong wind noise may generate | occur | produce. In particular, when the damper is squeezed, the flow rate of the conditioned air increases, so there is a concern that the wind noise will become stronger and the sound reduction effect of the baffle plate will be reduced. In addition, since the size of the air outlet in Patent Document 1 is the same as the conventional one, it does not contribute at all to the suppression of wind noise generated at the edge of the air outlet, and the sound reduction effect is not effective in this aspect as well. There was a risk of becoming sufficient.

  On the other hand, in Patent Document 2, the cross-sectional area of the air inlet and the cross-sectional area of the air outlet are the same, so the flow rate of the conditioned air from the air outlet is not different from the flow rate when flowing through the air duct. As described above, since the flow rate of the conditioned air flowing through the air duct is generally large for the central type air conditioner, it can be said that the suppression of wind noise is further insufficient. If this is viewed from the opposite viewpoint, the wind noise cannot be greatly suppressed, so the flow rate of the conditioned air must be limited, and then the cross-sectional area of the air duct increases, resulting in increased costs and reduced space use efficiency. It can be said that it is easy.

  Now, as a central air conditioning facility, it is possible to provide a blowing device and a suction device in each air-conditioned space, and use both the suction of dirty air and the supply of clean conditioned air. Because it is connected, when sucking air in the air-conditioned space, wind noise may be generated at the edge of the suction device, or sound may be generated when air passes through the suction device, Conventionally, it can be said that no measures against noise at the time of suction are taken.

  Also, in a central type air conditioning facility that sucks air with one air conditioning facility and sends it to a large number of air-conditioned spaces with a ventilation duct, it is assumed that noise such as wind noise is generated due to air suction. Although it is conceivable that noise propagates to the air-conditioned space through the air duct, conventionally, no noise countermeasure has been taken at the beginning of the air-conditioning equipment.

  The present invention has been made to improve the current situation.

The present invention relates to a blowing device and a suction device for an air conditioner, and among these, the blowing device is provided at the end of a blower duct in which conditioned air sent from one air conditioner branches and flows. A typical example is specified in claims 1 and 2 .

Of these, the invention of claim 1
“A blowing device provided at the end of a blower duct in which conditioned air sent from one air conditioner branches and flows,
A main body formed with an air inlet communicating with the air duct and an air outlet opening toward the air-conditioned space, and the main body for guiding the flow of conditioned air while absorbing noise propagated from the air duct With a sound-absorbing and sound-absorbing material arranged inside
The wind-absorbing sound-absorbing material is arranged in a partition wall shape so that the inside of the main body is divided into a plurality of unit passages, and the total flow area of the end portions of the unit passages is the cross-sectional area of the air inlet It is set larger.
This is the basic configuration.

  In addition, the flow path area of the unit passage and the cross-sectional area of the air inlet are cross-sectional areas cut by a plane orthogonal to the flow direction of the conditioned air.

In claim 1, in the basic configuration,
“The main body is circular or fan-shaped in plan view, and the air inlet is formed to open downward at the center of a circle or arc of the main body,
Between the adjacent wind guide sound absorbing materials by disposing the wind guide sound absorbing material extending in the radial direction in a portion extending outside the air inflow port in a plan view in the inside of the main body, so as to jump out in the circumferential direction. And the unit passageway,
Further, the wind guide sound absorbing material increases in thickness in plan view as it moves away from the air inlet, and the unit passage increases in distance in plan view as it moves away from the air inlet. Is set "
The structure is added.

The invention of claim 2 is the invention according to claim 1,
“A guide projection that protrudes toward the air inlet is provided in a portion of the main body that faces the air inlet.”
It is the composition.

The suction device is provided at the start end of the air duct connected to the suction machine at the end, and an example thereof is specified in claim 3, and the suction device is
“A main body in which an air outlet opening communicating with the air duct and an air inlet opening toward the air suction space are formed, and an air flow is absorbed while absorbing suction sound generated by sucking air into the main body. A wind-absorbing and sound-absorbing material arranged inside the main body for guiding, and arranging the wind-absorbing and sound-absorbing material in a partition wall shape so that the inside of the main body is divided into a plurality of unit passages, and The sum of the flow passage areas of the air inlets of the unit passages is set larger than the cross-sectional area of the air outlets. ''
This is the basic configuration .

And in the above basic configuration,
“The main body is circular or fan-shaped in plan view, and the air outlet is formed to open downward in the center of a circle or arc of the main body,
Between the adjacent wind guide sound absorbing materials, by disposing the wind guide sound absorbing material extending in the radial direction in a portion extending outside the air outlet in a plan view in the inside of the main body, jumping in the circumferential direction. And the unit passageway,
Further, the wind guide sound absorbing material increases in thickness in plan view as it moves away from the air outlet, and the unit passages increase in distance in plan view as they move away from the air outlet. Is set "
The structure is added.

In the first and second aspects of the present invention, since the inside of the main body is divided into a plurality of unit passages by the wind guide sound absorbing material, the conditioned air is in contact with substantially the entire circumference of the wind guide sound absorbing material, and the wind guide sound absorbing material. It is guided by and flows to the air outlet. Therefore, while the conditioned air is smoothly guided to suppress the flow resistance of the conditioned air, the area where the conditioned air contacts the wind guide sound absorbing material can be increased, and the sound absorption performance (sound reduction performance) can be improved.

  In addition, since the flow of conditioned air is guided by the wind noise absorber, the conditioned air can be smoothly separated from the wind noise absorber, and the sum of the channel cross-sectional areas at the end of each wind noise absorber Is larger than the cross-sectional area of the air inlet, the flow velocity of the conditioned air when passing through the air inlet sound absorber is smaller than the flow velocity when entering the air inlet, and these combine to generate from the air inlet absorber. Wind noise can be significantly suppressed.

  Furthermore, since the sum of the channel areas of the unit passages is larger than the channel area of the air inlet, the flow velocity at the location of the air outlet is also lower than the flow velocity of the air inlet. For this reason, it is also possible to suppress wind noise generated at the opening edge of the main body.

  As described above, the blowout device of the present application can absorb the noise from the air duct accurately with the wind guide sound absorbing material while significantly suppressing the generation of wind noise from the wind guide sound absorbing material, and at the opening edge of the main body. Since the generated wind noise can be reduced, the noise radiated from the blowing device to the air-conditioned space can be suppressed, and the quietness of the air-conditioned space can be improved. In addition, the sound absorbing property can be further improved by combining the sound absorbing material on the inner surface of the main body and the present invention.

  It is presumed that the sum of the flow path areas of the unit passages is preferably about several times as large as the flow path area of the air inflow port depending on the flow speed of the conditioned air, the size of the air-conditioned space, and the like, and it is difficult to uniquely determine. Moreover, when the opening area of the air outlet becomes large, there is a concern that wind noise generated from the opening edge of the main body may increase. In consideration of the scattering performance of conditioned air in the air-conditioned space, generally, the sum total of the channel areas of the unit passages is preferably several times (2 to 7, 8 times) the channel area of the air inlet. Guessed.

  From the viewpoint of sound absorption, it can be said that the conditioned air is preferably in contact with the wind guide sound absorbing material as much as possible. In this respect, it can be said that if the cross-sectional area of each unit passage is smaller than the cross-sectional area of the air inflow port, it is possible to increase the chance of the conditioned air contact with the wind guide sound absorbing material and contribute to the improvement of the sound absorbing performance.

  In addition, if the flow path area of the unit passage is too large, the straightness of the conditioned air may deteriorate and the diffusibility of the conditioned air in the air-conditioned space may deteriorate. If it is smaller than the cross-sectional area of the inlet, the cross-sectional area of each unit passage is smaller than the cross-sectional area of the air inlet, so that the flow rate of the conditioned air is prevented from excessively decreasing, and proper diffusion of the conditioned air in the conditioned space is prevented. Can also be secured.

In the invention of claim 1 , since the main body is circular or fan-shaped and the air outlet is spread in the circumferential direction, the diffusibility of the conditioned air released into the conditioned space can be enhanced. Therefore, it contributes to rapid air conditioning, Ru can also improve cooling efficiency.

In the invention of claim 1 , since the cross-sectional area of each unit passage increases in the flow direction of the conditioned air, the flow rate of the conditioned air decreases as it approaches the air outlet of the main body. Thereby, generation | occurrence | production of the wind noise when conditioned air leaves a wind-guide sound-absorbing material and a main body can be prevented or suppressed more correctly.

In the blowing device of the present invention, the conditioned air changes its direction from the air inlet and flows through the inside of the main body. However, when the conditioned air changes its direction, an attenuation phenomenon occurs where the sound is crushed, so that the sound absorption performance (sound reduction performance) is improved. Useful for In this case, the provision of the guide protrusions as claimed in claim 3, the conditioned air can redirecting to face the smooth air outlet.

  The magnitude of the wind noise greatly affects not only the material of the wind guide sound absorbing material and the flow velocity of the conditioned air, but also the shape of the wind guide sound absorbing material. For example, when the end of the wind guide sound absorbing material is square, when the conditioned air is separated from the wind guide sound absorbing material, a vortex is generated at the end of the wind guide sound absorbing material due to the pressure difference, and this tends to appear as wind noise.

  On the other hand, when the end portion of the wind guide sound absorbing material is rounded as in the embodiment, the conditioned air flows along the rounded portion of the wind guide sound absorbing material, so that the flow speed of the conditioned air is high. However, since it is possible to accurately prevent the generation of eddy currents, it is possible to prevent or remarkably suppress the generation of wind noise from the wind guide sound absorbing material. Therefore, even if conditioned air is supplied at a high speed, the generation of wind noise can be greatly reduced, and the quietness can be improved while ensuring a small diameter of the air duct and high air conditioning performance.

  Although it is possible to provide a large gap between the end of the wind guide sound absorbing material and the opening edge (air inlet) of the main body, as in the embodiment, the end of the wind guide sound absorbing material is positioned at the location of the air inlet or If it is located in the vicinity thereof, there is an advantage that the entire body can be made compact by making the main body as small as necessary. In addition, since the opening edge of the main body can be covered with the end portion of the wind guide sound absorbing material, the degree of contact of conditioned air with the opening edge of the main body is reduced, and the sound absorbing material generated at the opening edge of the main body is also suppressed. Can contribute.

In the suction device according to the third aspect , since the sum of the opening areas of the start ends of the unit passages is larger than the cross-sectional area of the air outlet, the air flow rate inside the air duct is increased and the suction device is moved to the suction device. The flow rate at the inflow of can be suppressed. For this reason, it is possible to suppress wind noise when flowing into the suction device while making the air duct as thin as possible, and even if sound is generated when passing through the inside of the main body constituting the suction device, the wind guide sound absorbing material Can absorb sound. For this reason, when air is sucked from the air-conditioned space, the air duct can be made as thin as possible to make the air-conditioning equipment compact, and the noise generated by the suction device can be suppressed to improve the quietness of the air-conditioned space.

  In addition, the suction device of the present invention can be provided at the start end of the facility that sends conditioned air from the air conditioner to a large number of conditioned spaces. In this case, since the sound entering the air duct can be suppressed, Contributes to improving the quietness of each air-conditioned space.

  A closed system in which the blowing device and the suction device of the present invention are provided in one air-conditioned space, the air sucked by the suction device is purified by the air-conditioning device, and this is sent to the blowing device by a blower duct can be adopted.

It is a side view of the ship which can apply this invention. It is a partial schematic diagram of a central type air conditioner. FIG. 3 is a schematic view taken along the line III-III in FIG. 2. It is a figure which shows the 1st reference example of a blowing device, (A) is a top view, (B) is BB sectional drawing of (A), (C) is CC sectional drawing of (A), D) is a DD sectional view of (C). It is a figure which shows 1st Embodiment, (A) is a partially broken top view, (B) is BB view sectional drawing of (A). It is a graph of the insertion loss value for showing the effect of a reference example and an embodiment. It is a graph which shows the silencing effect for showing the effect of a reference example and an embodiment. It is a figure which shows 2nd Embodiment. A diagram showing a second ginseng Reference Example, (A) is plan sectional view, a B-B sectional view of (B) is (A). It is a plane sectional view showing a 3rd embodiment.

(1). Outline of air conditioning equipment This embodiment is applied to a blowing device for a central air conditioning equipment of a ship. Therefore, first, an outline of the central air conditioning facility will be described with reference to FIGS. As shown in FIG. 1, a ship (cargo ship) 1 has an engine room 2 disposed at a rear part thereof, and a deck part 3 is provided above the engine room 2.

  The deck section 3 is provided with a large number of rooms (ship rooms) 4 as an example of an air-conditioned space in addition to rooms such as a control bridge and a canteen. The living room 4 is divided into multiple floors, and conditioned air is sent to the living rooms 4 on each floor from the central air conditioner 6 installed in the machine room 5 via the air duct 7.

  The air duct 7 includes a main duct 8 connected to the blower of the central air conditioner 6, an intermediate duct 9 branched from the main duct 7 for each floor, and a branch duct 10 branched from the intermediate duct 9 toward each room 4. The blowout device 11 of the present embodiment is provided at the end of each branch duct 10.

  As shown in FIG. 4C, a damper 12 that controls the amount of conditioned air is provided in the middle of the branch duct 10. The damper 12 is a butterfly valve system, for example, and its opening and closing is controlled by an actuator 13 such as a motor. Control of the opening / closing amount of the actuator 13 may be performed by a controller provided in each living room 4 or may be performed uniformly based on a temperature sensor provided in each living room 4 or the like.

(2). First Reference Example FIG. 4 shows a first reference example of the blowing device. The blowing device 11 of the first reference example includes an elongated cylindrical main body 14 in a plan view, and a wind guide sound absorbing material 15 disposed therein. The main body 14 is made of a metal plate such as a steel plate (may be made of a resin), and the wind guide sound absorbing material 15 is made of a sound absorbing material such as glass wool. An appropriate number of brackets 17 are provided at the upper end of the main body 14 in order to be fixed to the ceiling plate 16.

  The main body 14 has a rectangular shape with both ends open and has a rectangular cross-sectional shape with a large width with respect to the height. A circular air inlet 18 is provided in the middle of the longitudinal direction, and the air inlet 18 is provided. And the branch duct 10 are connected (fitted). In the illustrated embodiment, the air inlet 18 is fitted into the branch duct 10 from the outside, but may be fitted from the inside or may be flange-joined.

Since both ends of the main body 14 are open, in this reference example , both one end and the other end of the main body 14 are air outlets 19. The width of the main body 14 is larger than the outer diameter of the air inlet 18, and a pair of the wind guide and sound absorbing materials 15 are disposed on both sides of the inside of the main body 14 with the air inlet 18 in plan view. It arrange | positions with the attitude | position extended long in the longitudinal direction of 14 (or the flow direction of conditioned air).

  The wind guide sound absorbing material 15 is disposed on the center line of the main body 14 and the entire outer periphery thereof is exposed. That is, the wind guide sound absorbing material 15 is arranged in an island shape inside the main body 14. Accordingly, two unit passages 20 are formed inside the main body 14. The upper surface of the wind guide sound absorbing material 15 is in contact with the upper inner surface of the main body 14, and the lower surface of the wind guide sound absorbing material 15 is in contact with the lower inner surface of the main body 14. The wind guide sound absorbing material 15 is fixed to the main body 14 by appropriate means such as adhesion. The core material may be fixed to the main body 14 by arranging vertically centered core materials at appropriate intervals in the wind guide sound absorbing material 15.

  The wind guide sound absorbing material 15 can have a structure in which a porous material such as glass wool is covered with a skin material such as a film or a sheet. When the component (elemetont) of the wind guide sound absorbing material 15 is not scattered, the skin material is unnecessary. It is also possible to employ a metallic porous material such as a powdered aluminum sintered material or a metallic nonwoven fabric. Resin products can also be used, but inorganic materials or metal products are preferred when nonflammability is required.

The air inflow port 18 is arranged on an extension line of the wind guide sound absorbing material 15 in a plan view. Therefore, as indicated by an arrow in FIG. 4D, the conditioned air blown out from the air inlet 18 branches and flows into the unit passages 20 two by two.
A conical guide protrusion 21 is provided as an example of conditioned air direction changing guide means on the lower surface (bottom surface) of the main body 14 directly below the air inlet 18. The guide protrusion 21 allows the conditioned air to flow out of the air outlet. The direction is changed to 19 so as to go smoothly. The wind guide sound absorbing material 15 is arranged slightly shifted to the downstream side from the guide projection 21, and the four corner portions 22 and 23 in the plan view are rounded without an edge in the plan view (or plan sectional view). It is made up of different forms.

  The terminal end 24 located at the front end in the flow direction of the conditioned air in the wind guide sound absorbing material 15 is positioned slightly inside the air outlet 19 of the main body 14, but as indicated by a one-dot chain line in FIG. In addition, the end 24 may coincide with the peripheral edge of the air outlet 19 in the main body 14, or conversely, the end 24 of the wind guide sound absorbing material 15 may protrude slightly outside the air outlet 19.

A lining 25 made of a sound absorbing material such as glass wool is provided on the inner surface of the main body 14. The lining 25 may also leave the tissue exposed if the components do not scatter. The lining 25 can be provided on either or both of the upper surface and the lower surface of the main body 14 instead of or in addition to the inner surface. This point is the same in other reference examples and embodiments (the conditioned air strongly collides with the lower surface of the main body 14, so it is preferable to provide the lining 25 on at least the lower surface of the main body 14).

  The end portion 25a of the lining 25 has a rounded shape in plan sectional view. The end portion 25a of the lining 25 is slightly inward of the air outlet 19 but may extend to the air outlet 19 as indicated by a dashed line in (D).

Although there are four unit passages 20 in this reference example , the flow passage area (cross-sectional area) of each unit passage 20 is approximately the same as the cross-sectional area of the air inlet 18. Accordingly, the total cross-sectional area of the unit passage 20 is about four times the cross-sectional area of the air inlet 18.

(3). First Embodiment FIG. 5 shows a first embodiment of the blowing device 11. In this embodiment, the main body 14 is formed in a circular shape in plan view, and an air inflow port 18 is opened at the upper surface of the central portion thereof. Inside the main body 14, a large number of the wind guide sound absorbing materials 15 are arranged radially (petals) via upper and lower frame members 27. Accordingly, a large number of unit passages 20 extending in the radial direction are formed inside the main body 14. Each wind guide sound absorbing material 15 is fixed to the main body 14 by a rod 26 penetrating the wind guide sound absorbing material 15.

  The start end portion and the end portion of each wind guide sound absorbing material 15 are each formed in an arc shape in plan view, and the lateral width increases from the start end portion toward the end portion. Each unit passage 20 is also set so that its width increases as it goes outward in the radial direction. Since the air guide sound absorbing material 15 has a circular arc shape in plan view, the groove width of each unit passage 20 is abruptly expanded at the end portion thereof.

  The lateral width of the unit passage 20 (or a cross-sectional area cut by a plane orthogonal to the flow direction of the conditioned air) is smaller than the horizontal width (or a cross-sectional area cut by a plane orthogonal to the flow direction of the conditioned air) of the wind guide sound absorbing material 15. In addition, the cross-sectional area of each unit passage 20 (the cross-sectional area cut by a plane orthogonal to the flow direction of the conditioned air) is smaller than the cross-sectional area of the air inlet 18. However, since a large number of unit passages 20 are formed, the total cross-sectional area of each unit passage 20 is much larger than the cross-sectional area of the air inlet 18. Therefore, the flow rate of the conditioned air is greatly reduced inside the main body 14.

In the first embodiment, the end 24 of each wind guide sound absorbing material 15 is made to coincide with the edge of the air outlet 19. Of course, the end 24 of the wind guide sound absorbing material 15 may be slightly shifted to the inside of the air outlet 19 or slightly protruded to the outside.

(4). Summary of the first embodiment (and the first reference example)
In both the first embodiment and the first reference example , since the wind guide sound absorbing material 15 has a posture extending in the flow direction of the conditioned air, the flow resistance of the conditioned air is made as small as possible, and the conditioned air is the living room 4 (air-conditioned space). It is dissipated smoothly. For this reason, the conditioned air can be blown as far as possible to every corner of the living room 4 to contribute to the improvement of the air conditioning efficiency.

  Since the wind guide sound absorbing material 15 is made of a sound absorbing material, noise such as wind noise generated inside the air duct 7 can be absorbed, and wind noise generated when conditioned air passes through the wind guide sound absorbing material 15 is generated. The amount is small. In addition, the total flow area of the end portions of each unit passage 20 is several times (4, 5 times or more) the flow area of the air inlet 18, and the flow rate of the conditioned air is significantly reduced. The volume of wind noise generated at the opening edge of the main body 14 can also be suppressed.

  That is, while suppressing the wind noise generated by the wind guide sound absorbing material 15 and the main body 14, the noise (mainly wind noise) propagating from the air duct 7 can be accurately absorbed by the wind guide sound absorbing material 15. 4 can be improved (this point will be further described in detail).

In the first reference example , conditioned air can be blown in a linear direction. Therefore, it is suitable when the living room 4 is elongated. On the other hand, in the first embodiment, the conditioned air can be efficiently diffused around the air inlet 18. Therefore, it is suitable when the room 4 is square or close to this.

In the first embodiment, since the flow velocity of the conditioned air gradually decreases in each unit passage 20, the generation of wind noise when the conditioned air leaves the wind guide sound absorbing material 15 and the main body 14 can be more accurately prevented or Can be suppressed. Further, in both the embodiment and the reference example , it is also possible to prevent the vortex flow from being generated when the conditioned air is separated from the wind guide sound absorbing material 15 even when the end portion of the wind guide sound absorbing material 15 is rounded in a plan view. Thus, wind noise can be accurately reduced.

  The effect of reducing the wind noise described above is supported by the actually measured values (test results) shown in FIGS. This point will be described. FIG. 6 is a graph of an insertion loss value in which the effect of reducing the sound pressure level due to the provision of the wind guide sound absorbing material 15 is measured. The sound source and the sound pressure meter are sufficiently separated from each other and a sample (blowout device) is interposed therebetween. And how much the sound pressure is reduced by providing the blowing device 11 is shown. Therefore, it can be said that the higher the sound pressure number, the better the reduction effect.

C to E are comparative examples (conventional examples). 6A and 6B are measured with a damper opening angle of 100%. From the graph of FIG. 6, the actual施形status reference example, and the line type diffuser it can be understood that there is a tendency that the insertion loss value frequency increases is high. On the other hand, there is no significant tendency in frequency and sound insulation between the Pan-Kalber and the round diffuser, and it can be understood that the sound insulation performance is inferior to the embodiment and the reference example . That is, bread car louvers and round diffuser has flowed through the frequency noise, implementation forms (and Reference Examples) is made higher frequency noise also blocked accurately as wind noise, sound insulation (sound absorption) It can be understood that it is excellent.

  FIG. 7 is a graph obtained by measuring the actual wind noise power level based on JIS Z 8734 for the same sample as FIG. From this graph, it can be understood that the product of the present embodiment has a high effect of suppressing the generation of wind noise at each frequency. In addition, the sound that enters the human ear in the living room 4 is actually a sound in which various frequencies are mixed. Therefore, as a realistic evaluation, the volume in OA (overall) is important. It can be understood that the embodiment product of the present application has a low volume that actually enters the human ear.

It should be noted that the flow velocity at the air outlet 19 is lower in the first embodiment than in the first reference example . Therefore, generally, the effect of suppressing wind noise is higher in the first embodiment. In practice, the first reference example is more effective in suppressing wind noise. Although the reason has not been elucidated, it is presumed that the presence or absence of the lining 25 and the size of the exposed area of the metal part of the main body 14 are influential.

  Accordingly, by devising the shape of the main body 14, the material and form of the wind guide sound absorbing material 15 (particularly, the cross-sectional shape of the terminal portion), the arrangement amount and the position of the lining 25, the wind noise of the entire blowing device 11 can be reduced. It can be said that the generation can be further suppressed.

(5) Other Embodiments / Reference Examples Next, other embodiments and reference examples shown in FIG. The second embodiment shown in FIG. 8 is a modification of the first embodiment, in the example (A), a is Kakushirubefu sound absorbing material 15 is substantially the same form as the first embodiment, the body arrangement and orientation It is twisted about 14 axes. Accordingly, the respective wind guide sound absorbing materials 15 are arranged not in the radial direction of the main body 14 but in the spiral direction (spiral posture), and therefore, the conditioned air is diffused in a direction inclined with respect to the radial direction (spiral direction).

Therefore, the direction of the conditioned air is changed more strongly by each of the wind guide sound absorbing materials 15 than in the first embodiment. As a result, the degree to which the sound is crushed by the wind guide sound absorbing material 15 increases, and it can be said that the sound absorbing performance is excellent. In (A), as can be understood from the lines X 1 and X 2, there is always the wind guide sound absorbing material 15 outside the air inlet 18 in the radial direction (from the outside in the radial direction via the unit passage 20. The downward virtual extension line of the air inlet 18 cannot be seen.) For this reason, the conditioned air is always guided by the wind guide sound absorbing material 15 and flows in a spiral shape.

  In the example shown in (B) of FIG. 8, each of the wind guide sound absorbing materials 15 is formed in a square shape, and in the example shown in (C), the wind guide sound absorbing materials 15 are formed in a crescent shape (or arc shape). ing. (B) It can be said that (C) has a greater degree of directional change of conditioned air than (A).

The second reference example shown in FIG. 9 is basically the same as the first reference example , but an air inlet 18 is provided at one end of the main body 14, and the air outlet 19 is provided only at the other end of the main body 14. Provided. Therefore, it is suitable when the blowing device 11 is disposed near the wall. As indicated by the alternate long and short dash line, the flow rate of the conditioned air can be gradually reduced (or the diffusibility of the conditioned air can be increased) by gradually increasing the height of the main body 14 toward the air outlet 19. is there.

In the third embodiment shown in FIG. 10, the main body 14 is formed in a fan shape in a plan view, and a plurality of wind sound-absorbing materials 15 that are long in the radial direction are arranged in the main body 14 so as to jump in the circumferential direction. This case is also suitable when provided near the wall of the living room 4. In this embodiment, since the main body 14 has an inner surface, a lining 25 is provided on the inner surface. Although not shown in the figure, it is preferable to provide a conical guide protrusion just below the air inlet 18.

(6). Application to Suction Device Although each of the above embodiments is applied to a blowing device, the structure of each of the above embodiments can be applied to the suction device as it is. That is, the structure of each of the above embodiments can be applied as it is to the suction device of the equipment in which the start end of the air duct 7 is connected to the suction machine (suction fan). In this case, only the air flow direction is reversed. is there.

  And when it applies to a suction device, since the flow velocity in the start end part (upstream end part) of each unit channel | path 20 can be kept low, keeping the flow velocity in the ventilation duct 7 high, the wind noise at the time of air inflow is kept. It can be greatly suppressed. In addition, since the sound generated inside the main body 14 can be absorbed by the wind guide sound absorbing material 15 and the lining 25, it is possible to suppress the sound generated inside the main body 14 from being diffused into the air-conditioned space 4.

  It is also possible to open the main body 14 to the machine room 5 by applying any structure of the above embodiments to the starting end of the air conditioner 5. In this case, the noise entering the air duct 7 can be suppressed, which can contribute to improving the quietness of each air-conditioned space 4. It is also possible to construct a closed cycle air conditioning facility by installing an air supply air duct and an air intake air duct and interposing an air conditioner between the end of the air intake duct and the air supply air duct. It is.

(7). Others The present invention can be embodied in various ways other than the above embodiment.

  Various configurations can be adopted as means for imparting sound absorbing properties to the wind guide sound absorbing material. For example, it is possible to plant a blade-like sound-absorbing rectifier on the surface of a hard substrate such as a steel plate or a resin plate. The application target is not limited to a central air-conditioning facility for ships, but can also be applied to a central air-conditioning facility for buildings.

  The present invention can be embodied in a blowing device and a suction device of a duct air supply type air conditioning facility such as a central type. Therefore, it can be used industrially.

1 Ship (cargo ship)
4 Living room (air-conditioned space)
6 Central air conditioner 7 Blower duct 10 Branch duct 11 Blowout device 12 Air volume adjustment damper 14 Main body 15 Wind guide sound absorbing material 18 Air inlet 19 Air outlet 20 Unit passage 21 Guide projections 22, 23 Corner portion 24 of the wind guide sound absorbing material End of the wind-absorbing material 25 Lining made of sound-absorbing material

Claims (3)

A blow-out device provided at the end of an air duct in which conditioned air sent from one air conditioner branches and flows,
A main body formed with an air inlet communicating with the air duct and an air outlet opening toward the air-conditioned space, and the main body for guiding the flow of conditioned air while absorbing noise propagated from the air duct With a sound-absorbing and sound-absorbing material arranged inside
The wind-absorbing sound-absorbing material is arranged in a partition wall shape so that the inside of the main body is divided into a plurality of unit passages, and the total flow area of the end portions of the unit passages is the cross-sectional area of the air inlet In a configuration with a larger setting,
The main body is circular or fan-shaped in plan view , and the air inlet is formed to open downward in the center of a circle or arc of the main body,
Between the adjacent wind guide sound absorbing materials by disposing the wind guide sound absorbing material extending in the radial direction in a portion extending outside the air inflow port in a plan view in the inside of the main body, so as to jump out in the circumferential direction. And the unit passageway,
Further, the wind guide sound absorbing material increases in thickness in plan view as it moves away from the air inlet, and the unit passage increases in distance in plan view as it moves away from the air inlet. Set,
A blower for air conditioning equipment. A guide protrusion that protrudes toward the air inlet is provided in a portion of the main body that faces the air inlet.
The blowing device for air-conditioning equipment according to claim 1 . A suction device provided at the beginning of the air duct connected at the end to the suction machine,
A main body having an air outlet communicating with the air duct and an air inlet opening toward the air suction space, and guides the air flow while absorbing the suction sound generated by the suction of air into the main body. A wind-absorbing sound-absorbing material disposed inside the main body,
The wind-absorbing sound-absorbing material is arranged in a partition wall shape so that the inside of the main body is divided into a plurality of unit passages, and the sum total of the flow passage areas of the air inlets of the unit passages is cut off from the air outlets. In the configuration that is set larger than the area,
The main body is circular or fan-shaped in plan view, and the air outlet is formed to open downward in the center of the circle or arc of the main body,
Between the adjacent wind guide sound absorbing materials, by disposing the wind guide sound absorbing material extending in the radial direction in a portion extending outside the air outlet in a plan view in the inside of the main body, jumping in the circumferential direction. And the unit passageway,
Further, the wind guide sound absorbing material increases in thickness in plan view as it moves away from the air outlet, and the unit passages increase in distance in plan view as they move away from the air outlet. Set,
Suction device for air conditioning equipment.

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