JPH11153342A - Air stream control structure for ventilating part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit application of an air stream control structure on various structural body of a ventilating part, reduce a pressure loss as well as noise and prevent condensation when an air temperature is low, by a method wherein a flap for an indoor machine is arranged so as to be existing in the ventilating part through which air stream is passed, while the leading edge of the flap is provided with the structure of serration. SOLUTION: In an air outlet port of a ventilating part, a structural body for air flow direction control or a flap (louver) 3 and a plurality of vertical vanes 5 are provided in an air outlet passage while saw-tooth type serration structural parts 4 are formed on the leading edges 3a, 5a on the upstream side of air stream. Upon cooling or heating operation, air stream passes the serration structural parts 4. In this case, air stream generates vertical vortexes from both ends of a plurality of crests of the serration parts. The vertical vortexes promote the mixing of turbulent flows and supplement the moment of flow near the negative pressure surface of the flap 3 and vertical vanes 5 to restrain the separation of flow of air, whereby the stream of air on both surfaces of the flap 3 as well as the vertical vanes 5 is smoothed and aerodynamic noise is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow control structure for a ventilation section.

[0002]

2. Description of the Related Art The structure of a structure existing in a ventilation section, such as a flap (louver) provided at an air outlet of an indoor unit for an air conditioner, has as low a noise and a low pressure loss as possible. When the passing wind is cold, it is necessary that dew condensation hardly occurs.

As a countermeasure against these problems, for example, as shown in Japanese Patent Application Laid-Open No. 3-95350, the cross-sectional shape of the flap is made to be an upwardly convex airfoil with a large warp and the upper surface is provided with air. In some cases, a step is provided so that the downstream side is thicker than the upstream side.

In this manner, when the flap is turned downward during the heating operation, the main flow of the wind passing through the flap flows along the lower surface of the flap where the flap is greatly warped and flows downward. Therefore, the downward blowing can be performed without increasing the blowing resistance, and it is possible to prevent a decrease in the air volume and an increase in the blowing noise. In addition, when performing the cooling operation, when the flap is rotated upward, the air flow is separated due to a step on the upper surface side of the flap where the downstream side is thicker than the upstream side, and the air flow is separated, and it is easy to move in the horizontal direction. Become.

[0005]

However, in the case of the above-mentioned conventional structure, it is difficult to apply the above-mentioned structure other than the above-mentioned flap structure, and in the case of the above-mentioned structure, the air flow is separated due to a step. This causes an increase in pressure loss and aerodynamic noise. Furthermore, there is no effect of preventing dew condensation in cold air.

The present invention has been made to solve such a problem, and can be applied to various structures of a ventilation section, and has a low pressure loss, low noise, and hardly causes dew condensation in cold air. The purpose is to provide.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention is provided with the following means for solving the problems.

[0008] That is, the airflow control structure of the ventilation part according to the present invention is characterized in that, in the ventilation part through which the airflow passes, the edge of the structure existing there is a serration structure. In other words, in the configuration of the present invention, the edges of the structure that generates pressure loss or aerodynamic noise during ventilation have a serration structure, and the serration structure has a large number of small vertical vortices in the span direction of the structure. Is formed, whereby separation is suppressed and the wake vortex is subdivided, so that pressure loss is reduced and aerodynamic noise is reduced.

More specifically, when the structure existing in the ventilation section is, for example, a flap of an indoor unit for an air conditioner, the front edge of the flap is formed in a serrated structure. When the airflow flowing at a predetermined angle to the flap passes through the serration portion of the front edge portion, the serration portion of the front edge portion of the flap is small from both ends of the serrated peak portion. Generate vertical vortices. That is, the serrations function as vortex generators (vortex generators) to form many small longitudinal vortices. The presence of the vertical vortex promotes turbulent mixing, supplements the momentum of the flow near the flap wall surface (negative pressure surface), and makes it difficult for the flow to separate. Therefore, leading edge peeling is suppressed or prevented. As a result, low pressure loss and low noise are achieved. At the same time, condensation during cold air is also prevented.

[0010] Also, the structure which is also present in the ventilation section,
For example, in the case of a flap of an indoor unit for an air conditioner, if the rear edge of the flap is formed in a serrated structure, the presence of the serrated portion on the rear edge of the flap causes a rapid flow on the pressure surface side and a negative flow. The slow flows on the pressure surface side merge alternately at the trailing edge of the flap, instead of having the same phase. And thereby, the wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed.
As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

[0011] Further, the structure also present in the ventilation section,
For example, in the case of a flap of an indoor unit for an air conditioner, if the front edge and the rear edge of the flap are formed in a serrated structure, a suction surface is formed by the formation of the vertical vortex by the serration of the front edge of the flap. The pressure loss and the noise can be reduced more effectively by the separation preventing action on the side, the subdivision of the wide wake vortex by the serration of the trailing edge, and the wake suppressing action by the formation of the vertical vortex.

When the structure existing in the ventilation section is, for example, a vertical blade of an indoor unit for an air conditioner, the front edge of the vertical blade is formed in a serrated structure. And, by the serration of the vertical blade front edge portion, when the airflow flowing at a predetermined angle with respect to the vertical blade passes through the serration portion of the front edge portion, from the both ends of the serrated peak portion. Generates small vertical vortices. That is, the serrations at the leading edge act as vortex generators (vortex generators) to form many small longitudinal vortices. The presence of the vertical vortex promotes turbulent mixing, supplements the momentum of the flow near the vertical blade wall surface (negative pressure surface), and makes it difficult for the flow to separate. Therefore, peeling of the leading edge of the vertical blade is suppressed or prevented. As a result, low pressure loss and low noise are achieved. At the same time, condensation during cold air is also prevented.

Further, when the structure present in the ventilation section is, for example, a vertical blade of an indoor unit for an air conditioner, if the rear edge of the vertical blade has a serrated structure, the rear edge is Due to the presence of the serrations, the fast flow on the pressure side and the slow flow on the suction side alternately merge at the trailing edge, instead of having the same phase. And thereby, the wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

In the case where the structure existing in the ventilation section is, for example, a vertical blade of an indoor unit for an air conditioner, the front edge and the rear edge of the vertical blade each have a serrated structure. The separation of the suction surface side by the formation of the vertical vortex by the serrations of the leading edge, and the subdivision of the wide wake vortex by the serrations of the trailing edge;
By the wake suppression action by the formation of the vertical vortex, low pressure loss and low noise can be more effectively achieved.

When the structure existing in the ventilation section is, for example, a guide blade of a duct-type air outlet of an air conditioner, the front edge of the guide blade is formed in a serrated structure. When the airflow passing at a predetermined angle with respect to the guide blades passes through the serrations of the front edge portion, the serrations of the front edge portions cause small vertical vortices from both ends of the serrated peak portion. Generate. That is, the serrations at the leading edge act as vortex generators (vortex generators) to form many small longitudinal vortices. The presence of the longitudinal vortex promotes turbulent mixing, supplements the momentum of the flow near the guide blade wall surface (negative pressure surface), and makes it difficult for the flow to separate.
Accordingly, peeling of the leading edge of the guide blade is suppressed or prevented. As a result, low pressure loss and low noise are achieved.

Further, when the structure existing in the ventilation section is, for example, a guide blade of a duct-type air outlet of an air conditioner, if the rear edge of the guide blade has a serrated structure, Due to the presence of the serrations at the trailing edge, the fast flow on the pressure surface side and the slow flow on the suction surface side alternately merge at the trailing edge of the guide blade, instead of having the same phase. And thereby, the wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

Further, in the case where the structure existing in the ventilation section is, for example, a guide blade of a duct-type air outlet of an air conditioner, the front edge and the rear edge of the guide blade each have a serrated structure. In this case, the leading edge serrations prevent the separation on the suction side due to the formation of the longitudinal vortex, and the serrations of the trailing edge subdivide the wide wake vortex and suppress the wake of the longitudinal vortex. Thus, low pressure loss and low noise can be achieved more effectively.

When the structure existing in the ventilation section is, for example, a bell mouth of a blower fan, the air suction side edge is formed in a serrated structure. And
Due to the serration of the air suction side edge portion, when the airflow flowing at a predetermined angle to the bell mouth passes through the serration portion of the front edge portion, a small vertical length is formed from both ends of the serrated peak portion. A vortex is generated. That is, the serrations at the leading edge act as vortex generators (vortex generators) to form many small longitudinal vortices. And the presence of this vertical vortex promotes turbulent mixing,
The momentum of the flow near the bellmouth wall surface (negative pressure surface) is supplemented, and the flow is less likely to be separated. Therefore, peeling of the air suction port edge of the bell mouth is suppressed or prevented. As a result, low pressure loss and low noise are achieved.

When the structure existing in the ventilation section is, for example, an air outlet in a fan housing of a multi-blade blower, the edge portion is formed in a serrated structure. Then, the wake vortex is subdivided by the serrations at the edge of the mouth and the wake is suppressed by the formation of the vertical vortex, whereby low pressure loss and low noise are achieved.

When the structure existing in the ventilation section is, for example, a wind direction deflecting plate provided at an air outlet of an outdoor unit for an air conditioner, its front edge is formed in a serrated structure. . The pressure loss and noise can be reduced by the separation preventing action on the negative pressure side due to the formation of the vertical vortex due to the serration of the front edge.

Further, when the structure existing in the ventilation section is a wind direction deflecting plate provided at an air outlet of an outdoor unit for an air conditioner, for example, the rear edge has a serrated structure. In addition, noise is reduced by subdividing a wide wake vortex by serration of the trailing edge portion and wake suppressing action by formation of a vertical vortex.

Further, in the case where the structure in which the ventilation portion is present is, for example, a wind direction deflecting plate provided at an air outlet of an outdoor unit for an air conditioner, the front edge and the rear edge are each serrated. With this structure, it prevents separation on the suction side by the formation of longitudinal vortices due to the serrations of the leading edge, and subdivides the wide wake vortices by the serrations of the trailing edge, and suppresses the wakes by the formation of longitudinal vortices By the action, low pressure loss and low noise can be more effectively achieved.

When the structure existing in the ventilation section is, for example, a fan motor support stay of an air conditioner, the front edge of the fan motor support stay is formed in a serrated structure. And, due to the effect of preventing separation on the negative pressure side due to the formation of longitudinal vortices due to the serration of the front edge,
Low pressure loss and low noise are achieved.

In the case where the structure existing in the ventilation section is a fan motor support stay of an air conditioner,
When the trailing edge of the fan motor support stay has a serrated structure, a wide wake vortex is subdivided by the serration of the trailing edge, and the wake is suppressed by longitudinal vortex formation, so that low pressure loss and low noise are generated. Is achieved.

When the structure existing in the ventilation section is, for example, a plate fin type air heat exchanger of an air conditioner, the front edge of the plate fin of the air heat exchanger is formed in a serrated structure. Is done. Further, the pressure loss and noise can be reduced and the heat exchange performance can be further improved by the separation prevention effect on the negative pressure surface side due to the formation of the vertical vortex due to the serration of the front edge of the plate fin.

When the structure existing in the ventilation section is, for example, a plate fin type air heat exchanger of an air conditioner, the rear edge of the plate fin of the air heat exchanger has a serrated structure. In this case, a wide wake vortex is subdivided by the serration of the trailing edge of the plate fin, and the wake is suppressed by the formation of the vertical vortex, so that noise is reduced and heat exchange performance is further improved.

In the case where the structure existing in the ventilation section is, for example, a plate-fin type air heat exchanger of an air conditioner, the front edge and the rear edge of the air heat exchanger have serration structures. In this case, the longitudinal vortices formed by the serrations at the leading edge of the plate fin prevent the separation on the suction side, and the serrations at the trailing edge of the plate fins subdivide the wide wake vortices and form vertical vortices. By the wake suppression effect by the, more effectively low pressure loss,
Noise is reduced, and heat exchange performance is further improved.

When the structure existing in the ventilation section is, for example, a baffle plate provided in a muffling box of a ventilation duct for an air conditioner, the edge of the baffle plate is formed in a serrated structure. You. And, by the wake vortex subdivision by the serration of the edge of the baffle plate and the wake control action by the longitudinal vortex formation, low pressure loss and low noise are achieved.
Further, the silencing performance is improved.

[0029]

As described above, according to the air flow control structure of the ventilation part of the present invention, it can be applied to various structures of the ventilation part, and has low pressure loss and low noise, and hardly causes dew condensation even in cold air. It is possible to provide an airflow control structure.

[0030]

(Embodiment 1) First, FIGS.
1 shows an airflow control structure of a ventilation unit according to Embodiment 1 of the present invention.

In this embodiment, as shown in FIGS. 1 and 2, for example, the air outlet 2 of a wall-mounted air conditioner indoor unit 1 is used as a ventilation section. Flaps (louvers) 3 and vertical blades 5, 5,.
..Each air flow upstream side leading edge 3a, 5a, 5a,.
Are formed in serrated structures 4, 4,..., Respectively, as shown in FIG. 1 and 2 are an air inlet, 7 is an air heat exchanger,
8 is a cross flow fan, and 9 is a scroll part.

Therefore, in the configuration of the flap 3 and the vertical blades 5, 5,..., The air flow is controlled by the flap 3 and the vertical blades 5, 5, either during cooling or heating.
... at a predetermined inclination angle with respect to ..., as shown in FIG. 4 and FIG. A vertical vortex is formed from both ends of the peak. That is, the serration portion functions as a vortex generator (vortex generator). The longitudinal vortex promotes turbulent mixing, supplements the momentum of the flow near the negative pressure surface of the flap 3, the vertical blades 5, 5,.
The flow on both sides of the flap 3, the vertical blades 5, 5,... Becomes smooth, and pressure loss and aerodynamic noise are effectively reduced.

Further, as described above, since the separation of the flow on the negative pressure side is less likely to occur, dew condensation at the time of cooling in the portion is less likely to occur.

(Modification 1) In the above configuration, the upstream edge 3 of the flap 3, the vertical blades 5, 5,.
, a serration structure 4,
4 are formed, but the serration structures 4, 4 are, for example, as shown in FIG.
The downstream edges 3b, 5b of the vertical blades 5, 5,.
The pressure loss and the aerodynamic noise at the flap 3, the vertical blades 5, 5,...

That is, the flap 3, the vertical blades 5, 5,.
If there are serration structures 4, 4,... At the rear edges 3b, 5b, 5b,..., As shown in FIG. Due to the presence of the serrations, the fast flow on the pressure surface side and the slow flow on the suction surface side alternately merge at the trailing edge, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, longitudinal vortices are formed, which promotes turbulent mixing in the wake area and the wake area (area with low flow velocity)
Will shrink. That is, the wake is suppressed. as a result,
Noise reduction is achieved by subdividing the wake vortex, and low pressure loss is achieved by suppressing the wake.

(Modification 2) The serration structure 4, formed on the flap 3, the vertical blades 5, 5,...
.., As shown in FIG.
a, 5a, 5a ... and trailing edges 3b, 5b, 5b ...
It is also possible to form each in both.

By doing so, for example, FIGS.
As shown in the figure, the front edges 3a, 5a, 5a,.
The pressure loss and the aerodynamic noise are reduced and the dew condensation is prevented by the serration structures 4, 4,.
Since the serration structures 4, 4,... on the b, 5b... side simultaneously realize both the pressure loss and the aerodynamic noise reducing effect, the aerodynamic noise reducing effect is further improved.

(Modification 3) The constructions of the flap 3 and the vertical blade 5 according to Embodiment 1 and Modifications 1 and 2 are, for example, for ceiling-mounted air conditioners as shown in FIGS. The same can be applied to the air outlet 22 of the indoor unit 21 in the same manner, and the same operation and effect can be realized.

(Modification 4) Further, the configuration of the flap 3 and the vertical blade 5 according to the first embodiment and Modifications 1 and 2 is, for example, as shown in FIG. 14 and FIG. The same can be applied to the air outlet 32 of the machine 31 in the same manner, and the same operation and effect can be realized.

(Fifth Modification) The configuration of the flap 3 according to the first embodiment and the first and second modifications is, for example, as shown in FIG.
6 and FIG. 17, the same can be applied to the air outlets 42, 42 of the indoor unit 41 for the two-way blown-in-the-top type air conditioner, and the same operation and effect can be realized. it can.

(Modification 6) The structure of the flap 3 according to Embodiment 1 and Modifications 1 and 2 is, for example, as shown in FIG.
8 and 19 can be applied to the air outlets 52, 52, 52, 52 of the indoor unit 51 for a four-way blown-in air-conditioning type air conditioner, and the same operation and effect can be obtained. Can be realized.

(Embodiment 2) FIGS. 20 to 22 show an airflow control structure of a ventilation section according to Embodiment 2 of the present invention.

In this embodiment, as shown in the figure, a duct-type air conditioning air outlet 13 embedded in a ceiling is used as a ventilation section.
And 3 as a structure for controlling the wind direction provided in the air outlet passage 13a of the air outlet 13.
The airflow upstream-side leading edges 14a, 14a, 14a of the doughnut-shaped guide blades 14, 14, 14 having a double structure are formed by serration-shaped serration structures 4, 4, 4 similar to the first embodiment.
Formed.

Therefore, the guide blades 14, 14, 1
In the configuration of 4, in either case of cooling or heating,
Even when the air flow passes through the guide blades 14, 14, 14 at a predetermined inclination angle, when the air flow passes through the serration structures 4, 4, 4 on the upstream side, the air flow is reduced to a plurality of the serration portions. A vertical vortex is formed from both ends of the peak. That is, the serration portion functions as a vortex generator (vortex generator). The longitudinal vortex promotes turbulent mixing, supplements the momentum of the flow near the suction surface inside the guide vanes 14, 14, and suppresses the separation of the flow. , 14 are smoothed, and pressure loss and aerodynamic noise are effectively reduced.

In addition, since the flow is less likely to be separated on the negative pressure side as described above, dew condensation during cooling in this portion is less likely to occur.

(Modification 1) In the above-mentioned configuration, the airflow upstream-side front edges 14a, 1 of the guide blades 14, 14, 14 are formed.
The serration structures 4 and 4 are formed with respect to 4a and 14a. For example, as shown in FIG.
Rear edge 1 of the guide blades 14, 14, 14 on the downstream side of the air flow
4b, 14b, and 14b.

That is, the guide blades 14, 14, 1
When the serration structure portions 4, 4, 4 are provided at the downstream edge portions 14b, 14b, 14b on the downstream side of the airflow, the rear edge portions 14b,
Due to the serrations 14b, 14b, the fast flow on the pressure side and the slow flow on the suction side alternately merge at the trailing edge, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

(Modification 2) Further, as shown in FIG. 24, for example, the serration structure portions 4, 4, 4 are formed on the upstream front edge portions 14a, 14a of the guide blades 14, 14, 14, as shown in FIG.
14a, 14a and the downstream edge 14b, 14b on the downstream side of the airflow.
14b.

In this manner, the above-described front edge portion 14
a, 14a, serration structure portions 4, 4, 4 on the 14a side
, The pressure loss and aerodynamic noise reduction and dew condensation prevention action, and the pressure loss and aerodynamic noise reduction action by the serration structures 4, 4, and 4 on the trailing edges 14b, 14b, 14b are both realized at the same time, so that aerodynamic noise is further reduced. The effect is improved.

(Embodiment 3) FIGS. 25 to 27 show an airflow control structure of a ventilation section according to Embodiment 3 of the present invention.

In this embodiment, the bell mouth 17 of the propeller fan 15 of the outdoor unit 16 for an air conditioner having the propeller fan 15 as shown in FIG. Air suction side rim 17
26A, a serration structure 4 as shown in FIG. 26 is formed. In the drawings, reference numeral 6 denotes an air suction port, and reference numeral 7 denotes an air heat exchanger.

Therefore, in the configuration of the bell mouth 17, the air flow sucked widely from the side in the circumferential direction, as shown in FIG.
..., a vertical vortex is formed by the same action as described above, and the vertical vortex suppresses separation of the suction flow on the suction side of the bell mouth 17, so that the flow becomes smooth, and pressure loss and aerodynamic noise are effectively reduced. Reduced.

(Embodiment 4) FIGS. 28 and 29 show
14 shows an airflow control structure of a ventilation section according to Embodiment 4 of the present invention.

In this embodiment, a multi-blade fan (sirocco fan) 1 as shown in FIG.
8, the air outlet 20 of the spirally wound fan housing 19
For example, serration structures 4, 4, 4, and 4 as shown in FIG. 29 are formed on all four sides of the peripheral edge 20a of the fan housing 19 on the air outlet 20 side.

Therefore, in the configuration of the fan housing 19, as shown in FIG. 29, the wide air flow to be blown out has the serration structure portions 4, 4, 4, 4 of the downstream edge 20a of the air outlet 20 as shown in FIG. Due to the presence of the serrations in FIG. 4, the fast flow on the pressure surface side and the slow flow on the suction surface side alternately merge at the trailing edge, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

(Fifth Embodiment) FIGS. 30 to 32 show an airflow control structure of a ventilation section according to a fifth embodiment of the present invention.

In this embodiment, the outside air of the air conditioner outdoor unit 16 having the same air inlet 6, air heat exchanger 7, propeller fan 15, etc. as shown in FIG. The air outlet 33 is a target, and the wind direction deflecting plates 34, 34 externally attached to the air outlet 33 are provided.
.. Are structures existing in the ventilation section. The front edge portions 34a, 3 of the wind direction deflection plates 34, 34,.
In the portion 4a, for example, serration structures 4, 4,... Are formed as shown in FIG.

Therefore, the wind direction deflecting plates 34, 34,.
In the configuration of の, the air is blown out from the propeller fan 15,
As shown in FIG. 32, when the air flow passing at a predetermined angle with respect to the wind direction deflection plates 34, 34 passes through the serration structures 4, 4,... A longitudinal vortex is formed, which promotes turbulent mixing.
Since separation of the flow on the negative pressure surface side of 4, 34... Is suppressed, the flow becomes smooth, and pressure loss and aerodynamic noise are effectively reduced.

(Modification 1) In the above configuration, the airflow upstream side front edges 34a, 3a of the wind direction deflecting plates 34, 34,...
4a, the serration structures 4, 4,... Are formed.
.. May be formed on the rear edge portions 34b, 34b.

That is, the wind direction deflection plates 34, 34,.
If the serration structures 4, 4,... Are provided at the trailing edges 34b, 34b,.
, The fast flow on the pressure surface side and the slow flow on the negative pressure surface side alternately merge at the trailing edges 34b, 34b, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

(Modification 2) The serration structures 4, 4,... Are formed by the front edge portions 34a, 34a, and the rear edge portions 34b, 34b of the wind direction deflecting plates 34, 34,.
.. It is also possible to form each in both.

In this manner, the above-described front edge portion 34
a, 34a... side serration structures 4, 4,.
Pressure loss and aerodynamic noise reducing action and trailing edges 34b, 3
Since both the pressure loss and the aerodynamic noise reduction action are realized by the serration structures 4, 4.
The aerodynamic noise reduction effect is further improved.

(Embodiment 6) FIGS. 33 to 35 show an airflow control structure of a ventilation section according to Embodiment 6 of the present invention.

In this embodiment, for example, as shown in FIG. 33, the air outlet 24 of the duct-type air-conditioning ventilator 23 is targeted as a ventilation portion, and the air outlet 24 is provided in the air outlet passage. The airflow upstream-side front edge portions 25a of the wind direction deflector plates 25, 25 as provided wind direction control structures are provided.
For example, as shown in FIG. 34, each of the serrations 25a is formed in a serrated structure portion 4, 4.

Therefore, the configuration of the wind direction deflecting plates 25, 25 is such that the air flow flows into and passes through the wind direction deflecting plates 25, 25 at a predetermined inclination angle in either cooling or heating. In such a case, for example, as shown in FIG. 35, small longitudinal vortices are generated from both ends of the serrated peak portion when passing through the serration structure portions 4 and 4. That is, the serrations function as vortex generators (vortex generators) to form many small longitudinal vortices. The presence of the longitudinal vortex promotes turbulent mixing, and compensates for the momentum of the flow near the wall surfaces (negative pressure surfaces) of the wind direction deflecting plates 25, 25. Since the separation of the flow on the side is suppressed, the wind direction deflecting plate 25,
25 Both the flows on both sides become smooth, and pressure loss and aerodynamic noise are effectively reduced.

Further, since the flow is less likely to be separated on the negative pressure side, dew condensation during cooling in the portion is also less likely to occur.

(Modification 1) In the above configuration, the serration structures 4, 4 are formed with respect to the airflow upstream-side front edges 25a, 25a of the wind direction deflecting plates 25, 25. The aerodynamic noise of the wind direction deflecting plates 25, 25 can be similarly reduced by forming the structural parts 4, 4 on the trailing edges 25b, 25b on the downstream side of the air flow of the wind direction deflecting plates 25, 25, for example.

That is, if the serration structures 4, 4 are provided at the trailing edges 25b, 25b of the wind direction deflecting plates 25, 25, the presence of the serrations at the trailing edges 25b, 25b causes the rapid flow on the pressure surface side. And the slow flow on the negative pressure surface side alternately merge at the trailing edges 25b, 25b, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed.
As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

(Modification 2) The wind direction deflecting plate 25,
The serration structure portions 4, 4 formed in 25 can be formed on both the front edges 25a, 25a and the rear edges 25b, 25b, respectively.

In this manner, the above-described front edge 25
a, 25a side, the pressure loss and aerodynamic noise by the serration structures 4, 4 and the dew condensation preventing action and the rear edge 25b,
Since both the pressure loss and the aerodynamic noise reducing action by the serration structures 4 and 4 on the 25b side are realized, the aerodynamic noise reducing effect is further improved.

(Seventh Embodiment) FIGS. 36 to 38 show an airflow control structure of a ventilation section according to a seventh embodiment of the present invention.

In this embodiment, for example, FIGS.
As shown in FIG. 7, as the ventilation section, a ventilation path 44 extending from the air heat exchanger 43 of the outdoor unit 16 for air conditioning provided with the propeller fan 15 as shown to the propeller fan 15 is targeted. A rear end 4 of the air flow downstream side of a U-shaped cross-section stay-46, 46 for mounting and supporting a fan motor 45 provided on the air heat exchanger 43 side in the ventilation passage 44 as a body
Serration structures 4 and 4 are formed on 6a and 46a, for example, as shown in FIG.

Therefore, in the configuration of the stay 46, the air flow sucked from the outside through the air heat exchanger 43 causes the rear edges 46a, 46a of the stays 46 and 46 to be, for example, as shown in FIG. Due to the presence of the serrations at the time of passing through the serration structures 4 and 4, the fast flow on the pressure side and the slow flow on the suction side are not in the same phase at the trailing edges 46a and 46a, respectively. They will merge alternately. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake.

(Eighth Embodiment) FIGS. 39 to 41 show an airflow control structure of a ventilation section according to an eighth embodiment of the present invention.

In this embodiment, for example, FIGS.
As shown in FIG. 0, as the ventilation section, a ventilation path 44 extending from the air heat exchanger 43 of the outdoor unit 16 for air conditioning provided with the propeller fan 15 as shown to the propeller fan 15 is targeted. For example, as shown in FIG. 41, the front edges 46a and 46a of the U-shaped cross sections 46 and 46 for mounting and supporting the fan motor 45 provided on the side of the air heat exchanger 43 in the ventilation path 44. Serration structures 4, 4 are formed. In this case, unlike the above-described seventh embodiment, the front edges 46a, 4
Since 6a is open to the air heat exchanger 43, the serration structures 4, 4 are located on the upstream side of the air flow.

Therefore, in the configuration of the stays 46 and 46, the air flow sucked from the outside through the air heat exchanger 43 causes the air flow upstream-side front edge portions 46a and 46a as shown in FIG. , Small vertical vortices are generated from both ends of the serrated peaks. That is, the serrations function as vortex generators (vortex generators) to form many small longitudinal vortices. The presence of this vertical vortex promotes turbulent mixing, and compensates for the momentum of the flow near the wall surfaces (negative pressure surfaces) of the stays 46, 46, thereby leading the leading edges 46a, 46a of the stays 46, 46. Since the separation of the flow from 46a to the trailing edge portion is suppressed, the creepage flow becomes smooth, and pressure loss and aerodynamic noise are effectively reduced.

(Embodiment 9) FIGS. 42 and 43 show
19 shows an airflow control structure of a ventilation section according to Embodiment 9 of the present invention.

In this embodiment, as shown in FIGS. 42 and 43, for example, the outdoor unit 1 for an air conditioner is used as a ventilation unit.
Are the target, and the air flow upstream front edges 55a, 5 of the plate fins 55, 55,... Provided as heat transfer structures provided in the air heat exchanger 54.
Are formed in serrated structures 4, 4,..., Respectively, as shown in FIG. 43, for example.

Incidentally, reference numeral 54a in the figure denotes a heat transfer tube.

Therefore, the plate fins 55, 55
.., In the case of cooling or heating, the air flow is reduced by the plate fins 5 as shown by the arrows in the drawing.
, The serration structure portions 4, 4 of the upstream front edge portions 55a, 55a,.
... At the time of passage, small longitudinal vortices are generated from both ends of the serrated peaks of the serrations, and turbulent mixing is promoted. And thereby, the plate fins 55, 55
, The momentum of the flow on the suction side is compensated, and the separation of the flow on the plate fins 55, 55... Both become smooth, and pressure loss and aerodynamic noise are effectively reduced. As a result, the heat exchange performance is also improved.

Further, by eliminating the separation of the flow,
Dew condensation or frost formation on the portion is also less likely to occur.

(Modification 1) In the above configuration, the upstream edge 55 of the plate fins 55, 55.
are formed with respect to the plate fins 55, 5, for example, as shown in FIG.
The aerodynamic noise can be similarly reduced by forming the airflow downstream trailing edges 55b, 55b of 5 ....

That is, the plate fins 55, 55,.
If there are serration structures 4, 4,... At the rear edges 55b, 55b,.
, The fast flow on the pressure surface side and the slow flow on the negative pressure surface side alternately merge at the trailing edges 55b, 55b, instead of having the same phase. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, noise is reduced by subdividing the wake vortex, and pressure loss is reduced by suppressing the wake. In addition, heat exchange performance is also improved.

(Modification 2) The plate fins 5
Serration structures 4,4 formed in 5,55 ...
..., for example, as shown in FIG.
., and the rear edge portions 55b, 55b,...

In this way, the above-described front edge 55
The serration structures 4, 4,.
Pressure loss and aerodynamic noise reducing action and trailing edges 55b, 5
Since both the pressure loss and the aerodynamic noise reduction action are realized by the serration structures 4, 4.
The effect of reducing pressure loss and aerodynamic noise is further improved. Further, heat exchange performance is more effectively improved.

(Embodiment 10) FIGS. 46 and 47
Shows the airflow control structure of the ventilation section according to Embodiment 10 of the present invention.

In this embodiment, as shown in FIG. 46, a sound deadening box 60 provided in the middle of an air-conditioning duct device 59 is used as a ventilation part, and an air passage 60a in the sound deadening box 60 is provided. Edge portions 61 of baffle plates 61, 61 as silencing control structures provided in
47a and 61a are formed in serration structure portions 4 and 4 each having a sawtooth shape as shown in FIG. In addition,
Reference numeral 63 denotes a sound deadening material stuck inside.

Therefore, in the configuration of the baffle plates 61, 61, even when the airflow passes at a predetermined speed as indicated by an arrow in either cooling or heating,
At the time of passing through the serration structures 4 and 4, the presence of the serrations causes the fast flow on the pressure surface side and the slow flow on the suction surface side to merge alternately instead of having the same phase at each edge 61a. I will be. Thereby, a wide wake vortex is subdivided. At the same time, a vertical vortex is formed, so that turbulent mixing in the wake region is promoted, and the wake region (region with a small flow velocity) is reduced. That is, the wake is suppressed. As a result, the edge portions 61 of the baffle plates 61
The flow in the portions a and 61a becomes smooth, and pressure loss and aerodynamic noise are effectively reduced. As a result, the silencing performance is also improved.

Further, since the separation of the flow on the negative pressure side is reduced, dew condensation at the time of cooling in the portion is less likely to occur.

[Brief description of the drawings]

FIG. 1 is a front view of an air conditioner configured by applying an airflow control structure of a ventilation section according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view of the air conditioner.

FIG. 3 is a perspective view of an airflow control structure that is a main part of the air conditioner.

FIG. 4 is an explanatory diagram showing an operation of a first component of the main part.

FIG. 5 is an explanatory diagram showing an operation of a second component of the main part.

FIG. 6 is a perspective view of a main part of Modification Example 1 of the air conditioner.

FIG. 7 is an explanatory diagram showing an operation of a first component of a main part of Modification Example 1.

FIG. 8 is an explanatory diagram showing an operation of a second component of a main part of the first modification.

FIG. 9 is a perspective view of a main part of Modification 2 of the air conditioner.

FIG. 10 is an explanatory diagram showing an operation of a first component of a main part of Modification Example 2.

FIG. 11 is an explanatory diagram showing an operation of a second component of a main part of Modification Example 2.

FIG. 12 is a front view of an air conditioner of a third modification configured by applying the airflow control structure of the ventilation unit according to the first embodiment of the present invention.

FIG. 13 is a partially cutaway sectional view of the air conditioner.

FIG. 14 is a front view of an air conditioner of a fourth modification configured by applying the airflow control structure of the ventilation unit according to the first embodiment of the present invention.

FIG. 15 is a partially cutaway side view of the air conditioner.

FIG. 16 is a perspective view showing a configuration of an air conditioner of Modification Example 5 configured by applying the airflow control structure of the ventilation unit according to Embodiment 1 of the present invention.

FIG. 17 is a sectional view of a main part of the air conditioner.

FIG. 18 is a perspective view showing a configuration of an air conditioner of Modification 6 configured by applying the airflow control structure of the ventilation unit according to Embodiment 1 of the present invention.

FIG. 19 is a sectional view of a main part of the air conditioner.

FIG. 20 is a bottom view showing the airflow control structure of the ventilation section according to Embodiment 2 of the present invention.

FIG. 21 is a longitudinal sectional view of the main part.

FIG. 22 is an enlarged sectional view showing the structure of a component part of the main part.

FIG. 23 is an enlarged cross-sectional view showing a configuration of Modification Example 1 of a main part of an airflow control structure of a ventilation unit according to Embodiment 2 of the present invention.

FIG. 24 is an enlarged cross-sectional view showing a configuration of Modification 2 of the essential part.

FIG. 25 is a longitudinal sectional view showing an airflow control structure of a ventilation section according to Embodiment 3 of the present invention.

FIG. 26 is a partially cutaway front view of the essential part.

FIG. 27 is an explanatory view showing the operation of the components of the main part.

FIG. 28 is a perspective view showing an airflow control structure of a ventilation section according to Embodiment 4 of the present invention.

FIG. 29 is a horizontal sectional view of the essential part.

FIG. 30 is a longitudinal sectional view showing an airflow control structure of a ventilation section according to Embodiment 5 of the present invention.

FIG. 31 is a partially cutaway perspective view of components of the main part.

FIG. 32 is an explanatory view showing the operation of the components of the main part.

FIG. 33 is a longitudinal sectional view showing an airflow control structure of a ventilation section according to Embodiment 6 of the present invention.

FIG. 34 is a partially cutaway perspective view of components of the main part.

FIG. 35 is an explanatory diagram showing the operation of the components of the main part.

FIG. 36 is a horizontal sectional view showing an airflow control structure of a ventilation unit according to a seventh embodiment of the present invention.

FIG. 37 is a side view of a component part of the main part.

FIG. 38 is an explanatory view showing the structure and operation of constituent parts of the main part.

FIG. 39 is a horizontal sectional view showing an airflow control structure of a ventilation section according to Embodiment 8 of the present invention.

FIG. 40 is a side view of the essential part.

FIG. 41 is an explanatory view showing the structure and operation of constituent parts of the main part.

FIG. 42 is a top view of a main part showing an airflow control structure of a ventilation unit according to Embodiment 9 of the present invention.

FIG. 43 is a partially cutaway side view of components of the main part.

FIG. 44 is a side view showing a configuration of a main part of a modification 1 of the airflow control structure of the ventilation unit of the ninth embodiment.

FIG. 45 is a partially cutaway side view showing a configuration of a main part of Modification Example 2.

FIG. 46 is a longitudinal sectional view showing an airflow control structure of a ventilation section according to Embodiment 10 of the present invention.

FIG. 47 is a front view of components of the essential part.

[Explanation of symbols]

2 is an air outlet, 3 is a flap, 4 is a serration structure, 5 is a vertical blade, 13 is an air outlet, 14 is a guide blade, 15 is a propeller fan, 17 is a bell mouth, 18 is a multi-blade fan, and 19 is Fan housing, 25 a wind direction deflection plate, 33 an air outlet, 34 a wind direction deflection plate, 43 an air heat exchanger, 44 a ventilation path, 46 a stay, 46a an edge, 54 an air heat exchanger, 55 Is a plate fin, 60
Denotes a muffling box, and 61 denotes a baffle plate.

Claims (21)

[Claims] 1. An airflow control structure for a ventilation part, wherein an edge of an existing structure is formed in a serration structure in the ventilation part through which the airflow passes. 2. The ventilation part according to claim 1, wherein the structure existing in the ventilation part is a flap of an indoor unit for an air conditioner, and a front edge of the flap has a serration structure. Airflow control structure. 3. The ventilation part according to claim 1, wherein the structure existing in the ventilation part is a flap of an indoor unit for an air conditioner, and a rear edge of the flap has a serration structure. Airflow control structure. 4. A structure according to claim 1, wherein the structure existing in the ventilation portion is a flap of the indoor unit for the air conditioner, and a front edge and a rear edge of the flap have a serrated structure. The airflow control structure of the ventilation part as described. 5. The ventilation according to claim 1, wherein the structure existing in the ventilation section is a vertical blade of an indoor unit for an air conditioner, and a front edge of the vertical blade has a serrated structure. Airflow control structure. 6. The ventilation according to claim 1, wherein the structure existing in the ventilation section is a vertical blade of an indoor unit for an air conditioner, and a rear edge of the vertical blade has a serrated structure. Airflow control structure. 7. A structure according to claim 1, wherein the structure existing in the ventilation section is a vertical blade of the indoor unit for the air conditioner, and a front edge and a rear edge of the vertical blade each have a serrated structure. Item 2. An airflow control structure for a ventilation section according to Item 1. 8. The structure according to claim 1, wherein the structure existing in the ventilation section is a guide blade of a duct-type air outlet of the air conditioner, and a front edge of the guide blade has a serration structure. The airflow control structure of the ventilation part as described. 9. A structure according to claim 1, wherein the structure existing in the ventilation portion is a guide blade of a duct-type air outlet of the air conditioner, and a rear edge portion of the guide blade has a serrated structure. The airflow control structure of the ventilation part as described. 10. The structure present in the ventilation part is a guide blade of a duct-type air outlet of an air conditioner, and the front edge and the rear edge of the guide blade have a serrated structure. The airflow control structure for a ventilation section according to claim 1, wherein 11. The airflow control structure for a ventilation part according to claim 1, wherein the structure existing in the ventilation part is a bell mouth of a blower fan, and the air suction side edge part has a serrated structure. . 12. The ventilation part according to claim 1, wherein the structure existing in the ventilation part is an air outlet in a fan housing of the multi-blade fan, and an edge portion thereof has a serrated structure. Airflow control structure. 13. A wind direction deflecting plate provided at an air outlet of an outdoor unit for an air conditioner, wherein the structure existing in the ventilation unit is provided.
The airflow control structure for a ventilation part according to claim 1, wherein the front edge portion has a serration structure. 14. The structure present in the ventilation section is a wind direction deflecting plate provided at an air outlet of an outdoor unit for an air conditioner,
The airflow control structure for a ventilation part according to claim 1, wherein the rear edge has a serrated structure. 15. A wind direction deflecting plate provided in an air outlet of an outdoor unit for an air conditioner, wherein the structure existing in the ventilation unit is provided.
2. The airflow control structure for a ventilation unit according to claim 1, wherein the front edge and the rear edge each have a serrated structure. 16. The air conditioner according to claim 1, wherein the structure existing in the ventilation section is a fan motor support stay of the air conditioner, and a front edge of the fan motor support stay has a serrated structure. Airflow control structure for ventilation section. 17. The air conditioner according to claim 1, wherein the structure existing in the ventilation section is a fan motor support stay of the air conditioner, and a rear edge of the fan motor support stay has a serrated structure. Airflow control structure for ventilation section. 18. A structure present in the ventilation section is a plate fin type air heat exchanger of an air conditioner, and a plate fin front edge of the air heat exchanger has a serration structure. The airflow control structure for a ventilation section according to claim 1. 19. The air radiator according to claim 19, wherein the structure existing in the ventilation section is a plate fin type air heat exchanger of the air conditioner, and a rear edge of the plate fin of the air heat exchanger has a serrated structure. The airflow control structure for a ventilation section according to claim 1. 20. A structure existing in the ventilation section is a plate fin type air heat exchanger of an air conditioner, and a front edge and a rear edge of the plate fin of the air heat exchanger each have a serrated structure. The airflow control structure for a ventilation section according to claim 1, wherein: 21. The air conditioner, wherein the structure existing in the ventilation portion is a baffle plate provided in a sound deadening box of an air conditioning ventilation duct, and an edge of the baffle plate has a serrated structure. Item 2. An airflow control structure for a ventilation section according to Item 1.