CN111750436B - Ceiling embedded air conditioner - Google Patents
Ceiling embedded air conditioner Download PDFInfo
- Publication number
- CN111750436B CN111750436B CN202010098648.2A CN202010098648A CN111750436B CN 111750436 B CN111750436 B CN 111750436B CN 202010098648 A CN202010098648 A CN 202010098648A CN 111750436 B CN111750436 B CN 111750436B
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- Prior art keywords
- air
- airflow
- protrusions
- surface portion
- deflection plate
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/072—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser of elongated shape, e.g. between ceiling panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Duct Arrangements (AREA)
Abstract
The invention provides a ceiling-embedded air conditioner, which can form air flow along a wind deflector (5) even when the opening angle of the wind deflector (5) is small during cooling operation, and prevent dew condensation caused by stripping of air flow at the front surface (lower surface side) (5 a) of the wind deflector (5) during cooling operation. The air outlet (3) is composed of an inner air passage (13) and an outer air passage (14), the inner air passage (13) is composed of an upstream flat surface portion (13 a) and a downstream curved surface portion (13 b), and a plurality of protrusions (15) are formed at the end of the curved surface portion (13 b).
Description
Technical Field
The present invention relates to a wind direction deflection plate provided as a mechanism for controlling wind direction at an outlet of each outlet, for example, in a ceiling-embedded air conditioner having a plurality of outlets.
Background
As shown in fig. 6, a ceiling-embedded air conditioner 100 of the related art may include a casing 101, and a decorative plate 105 provided on the bottom surface of the casing 101 and having a plurality of outlets 102, inlets 103, and a wind direction deflection plate 104 (see, for example, patent document 1).
Fig. 7 (a) is a partial sectional view of the vicinity of the blowout port of the decorative plate used in the section X-X' of fig. 6 of the conventional ceiling-embedded air conditioner described in the above publication. Fig. 7 (b) is a partial sectional view of the conventional ceiling-embedded air conditioner described in the above publication, in the vicinity of an unused outlet of a decorative panel in the X-X' section of fig. 6.
As shown in fig. 7, by providing the internal air passage 102a, the blown-out air blocking member 106 provided on the upstream side of the unused air outlet 102, and the substantially flat airflow direction deflection plate 104 capable of closing the unused air outlet 102 entirely in the vicinity of the surface of the decorative plate 105 with the air outlet 102, it is possible to easily determine whether the air outlet 102 is used or not from the appearance of the decorative plate 105, and it is possible to adjust the airflow direction for each air outlet 102, thereby improving the suitability of people and objects.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2000-205642
Disclosure of Invention
Problems to be solved by the invention
However, in the above-described conventional structure, when the opening angle of the airflow direction deflector 104 is small in a partial cross section near the blowout port 102 of the decorative plate 105 during use of the blowout port 102 as shown in fig. 8, the airflow W passing through the internal airflow path 102a does not peel along the surface Z (front surface portion) of the airflow direction deflector 104 as seen from the inside of the room, and there is a problem that condensation occurs on the surface Z due to a temperature difference between the temperature of the airflow direction deflector 104 cooled by the cool air and the high-temperature and high-humidity indoor air W' during cooling operation, for example.
Means for solving the problems
In order to solve the above-described conventional problems, a ceiling embedded air conditioner according to the present invention is characterized in that: the air conditioner includes an air outlet including an inner air passage and an outer air passage, the inner air passage including an upstream flat portion and a downstream curved portion, and a plurality of protrusions formed at an end of the curved portion.
Thus, the airflow that has impacted the protrusion of the air outlet generates a vertical vortex, and flows along the front surface portion (lower surface side) of the wind direction deflection plate.
Therefore, like a ceiling-embedded air conditioner, air flowing in a substantially vertical direction from the upstream of the air outlet is guided from the inner air passage of the air outlet to the wind direction deflection plate and blown out.
Thus, even when the opening area of the airflow direction deflection plate of the air outlet is small, that is, when the opening angle is small, the air is not peeled off from the front surface portion (lower surface side) of the airflow direction deflection plate and flows.
ADVANTAGEOUS EFFECTS OF INVENTION
The ceiling-embedded air conditioner of the present invention can form an air flow along the air deflector even when the opening angle of the air deflector is small during cooling operation, and prevent dew condensation caused by stripping of the air flow at the front (lower surface side) of the air deflector during cooling operation.
Drawings
Fig. 1 is a perspective view of a ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of A-A' of a ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 3 is a partial cross-sectional perspective view and a partial enlarged view of an air outlet in use of the ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 4 is a partial sectional view and a partial enlarged view of the vicinity of the air outlet of the decorative panel in the section A-A' of fig. 1 of the ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 5 is a partial cross-sectional perspective view and a partial enlarged view of a blowout port used in the ceiling-embedded air conditioner according to embodiment 2 of the present invention.
Fig. 6 is a perspective view of a conventional ceiling-embedded air conditioner.
In fig. 7, (a) is a partial sectional view of the conventional ceiling-embedded air conditioner in the vicinity of the used blowout port of the decorative plate in the X-X 'section of fig. 6, and (b) is a partial sectional view of the conventional ceiling-embedded air conditioner in the vicinity of the unused blowout port of the decorative plate in the X-X' section of fig. 6.
Fig. 8 is an explanatory view of air flow in the vicinity of the air outlet of the decorative panel in the X-X' section of fig. 6 of the conventional ceiling-embedded air conditioner.
Description of the reference numerals
2. Shell body
3. Blowing-out port
4. Suction inlet
5. Wind direction deflection plate
6. Decorative board
13. Inner side air path
13a plane part
13b curved surface portion
14. Outside wind path
15. Protrusions
15a concave-convex portion
Detailed Description
The invention 1 relates to a ceiling-embedded air conditioner, comprising: a housing capable of being buried in a ceiling; a decorative plate arranged on the bottom surface of the shell; a suction port provided in the decorative plate and sucking air in a room into the casing; a blowout port for blowing out air sucked into the casing from the suction port into a room; and a wind direction deflection plate provided at one end of the air outlet, the air outlet including an inner air passage and an outer air passage, the inner air passage including an upstream flat surface portion and a downstream curved surface portion, the curved surface portion having a plurality of protrusions formed at an end thereof.
Thus, the airflow that has impacted the protrusion of the air outlet generates a vertical vortex that flows along the surface of the wind direction deflection plate.
Therefore, like a ceiling-embedded air conditioner, air flowing in a substantially vertical direction from the upstream side of the air outlet is guided from the inner air passage of the air outlet to the airflow direction deflection plate and blown out, and even when the opening area of the airflow direction deflection plate of the air outlet is small, that is, the opening angle is small, the air is not peeled off from the front surface portion (lower surface side) of the airflow direction deflection plate and flows.
Thus, even when the opening angle of the airflow direction deflection plate in the cooling operation is small, the airflow along the airflow direction deflection plate can be formed, and dew condensation due to the separation of the airflow in the front portion (lower surface side) of the airflow direction deflection plate in the cooling operation can be prevented.
The invention according to claim 2 is characterized in that the surface of the plurality of projections is formed with a plurality of concave-convex portions smaller than the plurality of projections.
In this way, the resistance when the airflow is impacted is reduced, and the airflow along the protrusion is maintained by the small vortex formed near the wall surface of the protrusion, so that the vertical vortex generated on the upstream side is not combined with the vertical vortex generated on the adjacent side.
Therefore, even when the wind speed is high, the vertical vortex generated by the protrusion is reliably caused to reach the wind direction deflection plate while the resistance caused by the protrusion is reduced, and the airflow to the front surface portion (lower surface side) of the wind direction deflection plate is generated.
Therefore, in particular, even in the case of a sudden wind having a high wind speed, the airflow along the wind direction deflection plate can be formed, and dew condensation due to the separation of the airflow in the front portion (lower surface side) of the wind direction deflection plate during the cooling operation can be prevented.
In the invention according to claim 3, the plurality of projections are formed in a shape as viewed from a normal direction of the projections, such that the projections have a substantially elliptical shape with a long axis in a flow direction.
Thus, by forming the flow direction as an ellipse with a long axis, a small-sized vertical vortex is generated when the flow is impacted against the protrusion as compared with a circular shape or the like, and the long axis guides the airflow.
Therefore, even in the case of a low air volume where it is difficult to generate vertical vortex, the vertical vortex generated by the protrusion is reliably conveyed to the front surface portion (lower surface side) of the wind deflection plate.
Therefore, even when the opening angle of the airflow direction deflection plate is small during the cooling operation, particularly when the wind speed is low, the airflow along the airflow direction deflection plate can be formed, and dew condensation due to the peeling of the airflow in the front portion (lower surface side) of the airflow direction deflection plate during the cooling operation can be prevented.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.
(embodiment 1)
Fig. 1 is a perspective view of a ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 2 is a sectional view of A-A' of fig. 1 of a ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 3 is a partial cross-sectional perspective view and a partial enlarged view of an air outlet in use in the ceiling-embedded air conditioner according to embodiment 1 of the present invention.
Fig. 4 is a partial cross-sectional view and a partial enlarged view of the ceiling-embedded air conditioner according to embodiment 1 of the present invention, in the vicinity of the air outlet of the decorative panel in the section A-A' of fig. 1.
In fig. 1, the ceiling-embedded air conditioner 1 includes a casing 2, and a decorative plate 6 provided on the bottom surface of the casing 2 and having a plurality of air outlets 3, air inlets 4, and air deflection plates 5.
In fig. 2, the ceiling-embedded air conditioner 1 includes: a centrifugal fan 7; a motor 8 for driving the centrifugal fan 7; a suction port 4 formed by a grill 4a and a filter 4 b; the air flow W flowing in from the suction port 4 is guided to the mouth (orifice) 9 of the centrifugal fan 7; a heat exchanger 10 disposed so as to surround the centrifugal fan 7; a drain pan (drain pan) 11 that supports the heat exchanger 10 and forms a part of the internal air passage 3a of the air outlet 3 on the casing 2 side; and an inner heat insulator 12 provided on the inner surface of the casing 2 and forming a part of the inner air passage 3a of the air outlet 3.
The ceiling-embedded air conditioner 1 is installed so as to be suspended in the recess of the ceiling 50 by the suspension bolts 51.
As shown in fig. 3, the air outlet 3 includes an inner duct 13, an outer duct 14, a wind direction deflector 5, and a motor 16 for rotating the wind direction deflector 5, and the inner duct 13 includes an upstream flat portion 13a and a downstream curved portion 13b. A plurality of protrusions 15 are provided at the end of the curved surface portion 13b, and the airflow W is formed in a substantially elliptical shape having a long axis in the flow direction, and concave-convex portions 15a smaller than the protrusions 15 are formed on the surface.
Further, as shown in fig. 4, the wind deflector 5 includes a front surface portion 5a, a rear surface portion 5b, and a rotation shaft portion 5c to which the motor 16 is connected.
The operation and operation of the ceiling-embedded air conditioner configured as described above will be described below.
First, as shown in fig. 2, by rotating the centrifugal fan 7 by the motor 8, an air flow W is generated by a pressure difference between the inside of the room (atmospheric pressure) and the inside of the ceiling-embedded air conditioner 1, and the air flow is guided to the centrifugal fan 7 in this order of the grill 4a, the filter 4b, and the mouth 9.
Then, the airflow W blown out from the centrifugal fan 7 is heated by the heating operation in the heat exchanger 10, passes through the internal air duct 3a while being cooled by the cooling operation, and is blown out into the room from the open blowout port 3 by rotating the airflow deflection plate 5.
As shown in fig. 3 and 4, the airflow direction deflection plate 5 is rotated in the rotation direction C to change the opening area of the air outlet 3 and also to change the air blowing direction.
Therefore, when the opening area of the airflow direction deflection plate 5 is small as in the cooling operation, the airflow peeled off from the front surface portion 5a of the airflow direction deflection plate 5 up to this point is caused to generate a vertical vortex by the protrusion 15, and the airflow flowing near the curved surface portion 13b is increased, so that the flow direction of the airflow is changed along the front surface portion 5a of the airflow direction deflection plate 5.
As described above, in the present embodiment, since the plurality of protrusions 15 are formed at the end of the curved surface portion 13b, when the opening area of the airflow deflection plate 5 is small, the airflow peeled off from the front surface portion 5a of the airflow deflection plate 5 up to this point is caused to generate a vertical vortex by the protrusions 15, and the airflow flowing in the vicinity of the curved surface portion 13b is increased, and the flow direction of the airflow is changed so as to follow the front surface portion 5a of the airflow deflection plate 5.
Therefore, even when the opening angle of the airflow direction deflection plate 5 during the cooling operation is small, the airflow along the airflow direction deflection plate 5 can be formed, and dew condensation due to the separation of the airflow in the front surface portion 5a of the airflow direction deflection plate 5 during the cooling operation can be prevented.
Since the force required to change the direction of the airflow W is proportional to the flow velocity, the flow velocity Vw of the present embodiment is about vw=1.0L to 3.0L with respect to the width L of the air outlet 3 in fig. 1.
Accordingly, regarding the size of the protrusions 15 of the present embodiment, as the substantial ellipse whose flow direction is the major axis, the major axis L1 is 0.005L to 0.02L, the minor axis L2 is 0.001L to 0.01L, and the height h is 0.001L to 0.01L with respect to the width L of the blowout port 3, so that the interval P between the protrusions 15 in the width direction of the blowout port 3 is 0.025L to 0.075L with respect to the width L of the blowout port 3, whereby the vertical vortex is generated by the protrusions 15 without excessively increasing the resistance of the airflow caused by the protrusions 15, and the airflow flowing in the vicinity of the curved surface portion 13b is increased, and the flow direction of the airflow is changed so as to follow the front surface portion 5a of the wind direction deflection plate 5.
In the present embodiment, the protrusion 15 has a plurality of concave-convex portions 15a formed on its surface, which are smaller than the plurality of protrusions, so that the resistance when the airflow impinges on the protrusion 15 is reduced, and the airflow along the protrusion 15 is maintained by the minute vortex generated in the vicinity of the wall surface of the protrusion 15, and the vertical vortex generated on the upstream side is not combined with the vertical vortex generated on the adjacent side.
Therefore, even when the wind speed is high, the vertical vortex generated by the protrusion 15 is reliably caused to reach the wind direction deflection plate 5 while the resistance caused by the protrusion 15 is reduced, and the airflow to the front surface portion (lower surface side) 5a of the wind direction deflection plate 5 is generated.
Therefore, in particular, in the case of a sudden wind having a high wind speed, the airflow along the airflow direction deflection plate 5 can be formed, and dew condensation due to the separation of the airflow from the front surface portion (lower surface side) 5a of the airflow direction deflection plate 5 during the cooling operation can be prevented.
In the present embodiment, the shape of the protrusion 15 is formed into a substantially elliptical shape having a long axis in the flow direction, so that a vortex of a smaller scale is generated when the protrusion 15 is impacted compared to a circular shape or the like, and the air flow is guided by the long axis.
Therefore, even in the case of a low air volume in which the vertical vortex is difficult to generate, the vertical vortex generated by the protrusion 15 is reliably conveyed to the front surface portion (lower surface side) 5a of the wind deflector 5.
Therefore, even when the opening angle of the airflow direction deflection plate is small during the cooling operation, particularly when the wind speed is low, the airflow along the airflow direction deflection plate can be formed, and dew condensation due to the peeling of the airflow in the front portion (lower surface side) of the airflow direction deflection plate during the cooling operation can be prevented.
Further, by making the intervals P between the projections 15 of the present embodiment unequal, the vertical vortex generated by the projections 15 can be made uneven in size, and the peak in a specific frequency band of the noise generated at the air outlet 3 can be suppressed, thereby reducing the noise.
In the present embodiment, the number of the protrusions 15 is not particularly limited as long as the interval P is ensured, and may be changed to a number that does not excessively increase the pressure loss of the air flow caused by the protrusions 15 according to the amount of air blown out from the air outlet 3, but increases the air flow flowing in the vicinity of the curved surface portion 13b by the generation of the vertical vortex by the protrusions 15, and changes the flow direction of the air flow so as to follow the front surface portion 5a of the wind deflector 5.
(embodiment 2)
Fig. 5 is a partial cross-sectional perspective view and a partial enlarged view of an air outlet in a ceiling-embedded air conditioner according to embodiment 2 of the present invention. The same reference numerals are given to the same or corresponding parts as those in embodiment 1, and a part of the description thereof will be omitted.
As shown in fig. 5, a plurality of projections 15 are formed at intervals P between distances of 0.3L or less from both ends of the air outlet 3.
The operation and operation of the ceiling-embedded air conditioner configured as described above will be described below.
When the opening area of the wind direction deflector 5 is small and the wind speed is low as in the cooling operation, the coanda effect (inertial force along the curved surface) of the curved surface portion 13b is weak, and it is difficult to generate the airflow along the front surface portion (lower surface side) 5a of the wind direction deflector 5.
Therefore, by causing the airflow peeled off from the front surface portion 5a of the wind direction deflection plate 5 up to this point to generate vertical vortices by the protrusions 15 formed near the both ends of the air outlet 3, the airflow flowing near the curved surface portion 13b is increased, and the flow direction of the airflow is changed so as to follow the front surface portion 5a of the wind direction deflection plate 5.
As described above, in the present embodiment, the plurality of projections 15 are formed at intervals P between the distances of 0.3L or less from the both ends of the air outlet 3, whereby a negative pressure region is generated in a region where the wind speed is low, and an air flow to the front surface portion (lower surface side) 5a of the wind deflector 5 is generated.
Therefore, even in the case of weak wind having a low wind speed, the air flow along the front surface portion (lower surface side) 5a of the airflow direction deflection plate 5 can be formed, and dew condensation due to the separation of the air flow along the front surface portion (lower surface side) 5a of the airflow direction deflection plate 5 during the cooling operation can be prevented.
Since the force required to change the direction of the airflow W is proportional to the flow velocity, the flow velocity Vw of the present embodiment is about vw=1.0L to 3.0L with respect to the width L of the air outlet 3 in fig. 1.
Accordingly, regarding the size of the protrusions 15 of the present embodiment, as the substantial ellipse whose flow direction is the major axis, the major axis L1 is 0.005L to 0.02L, the minor axis L2 is 0.001L to 0.01L, and the height h is 0.001L to 0.01L with respect to the width L of the blowout port 3, so that the interval P between the protrusions 15 in the width direction of the blowout port 3 is 0.025L to 0.075L with respect to the width L of the blowout port 3, whereby the vertical vortex is generated by the protrusions 15 without excessively increasing the resistance of the airflow caused by the protrusions 15, and the airflow flowing in the vicinity of the curved surface portion 13b is increased, and the flow direction of the airflow is changed so as to follow the front surface portion 5a of the wind direction deflection plate 5.
In the present embodiment, by forming the plurality of concave-convex portions 15a smaller than the plurality of protrusions on the surface of the protrusion 15, the airflow along the protrusion 15 is maintained by the minute vortex generated in the vicinity of the wall surface of the protrusion 15, and the vertical vortex generated on the upstream side is not combined with the vertical vortex generated on the adjacent side.
Therefore, the vertical vortex generated by the protrusion 15 is reliably caused to reach the airflow deflection plate 5 while reducing the resistance caused by the protrusion 15, and an airflow is generated to the front surface portion (lower surface side) 5a of the airflow deflection plate 5.
Therefore, the air flow along the airflow direction deflection plate 5 can be formed, and dew condensation due to the peeling of the air flow from the front surface portion (lower surface side) 5a of the airflow direction deflection plate 5 during the cooling operation can be prevented.
In the present embodiment, the shape of the protrusion 15 is formed into a substantially elliptical shape having a long axis in the flow direction, so that a vortex of a smaller scale is generated when the protrusion 15 is impacted compared to a circular shape or the like, and the air flow is guided by the long axis.
Therefore, even in the case of a low air volume in which the vertical vortex is difficult to generate, the vertical vortex generated by the protrusion 15 is reliably conveyed to the front surface portion (lower surface side) 5a of the wind deflector 5.
Therefore, even when the opening angle of the airflow direction deflection plate 5 is small during the cooling operation, particularly when the wind speed is low, the airflow along the airflow direction deflection plate can be formed, and dew condensation due to the separation of the airflow in the front portion (lower surface side) of the airflow direction deflection plate during the cooling operation can be prevented.
Further, by making the intervals P between the projections 15 of the present embodiment unequal, the vertical vortex generated by the projections 15 can be made uneven in size, and the peak in a specific frequency band of the noise generated at the air outlet 3 can be suppressed, thereby reducing the noise.
In the present embodiment, the number of the protrusions 15 is not particularly limited as long as the interval P is ensured, and may be changed to a number that does not excessively increase the pressure loss of the air flow caused by the protrusions 15 according to the amount of air blown out from the air outlet 3, but increases the air flow flowing in the vicinity of the curved surface portion 13b by the generation of the vertical vortex by the protrusions 15, and changes the flow direction of the air flow so as to follow the front surface portion 5a of the wind deflector 5.
Industrial applicability
As described above, in the ceiling-embedded air conditioner according to the present invention, in the case of the cooling operation, dew condensation on the lower surface of the wind direction deflection plate due to peeling of the air flow from the upstream side of the internal air passage at the front edge portion of the wind direction deflection plate can be prevented, and therefore, the ceiling-embedded air conditioner can be applied to applications such as an air conditioner, an air cleaner, a dryer, and an in-vehicle air conditioner.
Claims (2)
1. A ceiling-embedded air conditioner, comprising:
a housing capable of being buried in a ceiling;
a decorative plate arranged on the bottom surface of the shell;
a suction port provided in the decorative plate and sucking air in a room into the casing;
a blowout port for blowing out air sucked into the casing from the suction port into a room; and
a wind direction deflection plate provided at one end of the air outlet and performing wind direction control by rotating a rotation shaft,
the air outlet is composed of an inner air passage and an outer air passage, the inner air passage is composed of an upstream flat surface portion and a downstream curved surface portion, a plurality of protrusions are formed at the ends of the curved surface portions at intervals so that an air flow colliding with the plurality of protrusions generates a vertical vortex and flows along a surface portion provided on the air deflection plate on the lower surface side of the air deflection plate,
the surfaces of the plurality of protrusions are formed with a plurality of concave-convex portions smaller than the plurality of protrusions so that the longitudinal vortex generated on the upstream side is not combined with the adjacent generated longitudinal vortex.
2. The ceiling-embedded air conditioner as set forth in claim 1, wherein:
the plurality of protrusions are formed in an elliptical shape having a flow direction of a major axis, as viewed from a normal direction of the protrusions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-060092 | 2019-03-27 | ||
| JP2019060092A JP7232986B2 (en) | 2019-03-27 | 2019-03-27 | ceiling embedded air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111750436A CN111750436A (en) | 2020-10-09 |
| CN111750436B true CN111750436B (en) | 2023-10-03 |
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| CN202010098648.2A Active CN111750436B (en) | 2019-03-27 | 2020-02-18 | Ceiling embedded air conditioner |
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| EP (1) | EP3715730A1 (en) |
| JP (1) | JP7232986B2 (en) |
| CN (1) | CN111750436B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113108370A (en) * | 2021-05-18 | 2021-07-13 | 宁波康韩瑞电器有限公司 | Air guide assembly and air conditioner |
| CN113324285A (en) * | 2021-07-05 | 2021-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Air conditioner indoor unit, air conditioner control method and device and air conditioner |
| CN114791126B (en) * | 2022-04-28 | 2023-09-08 | 广东美的白色家电技术创新中心有限公司 | Ceiling machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3715730A1 (en) | 2020-09-30 |
| JP2020159637A (en) | 2020-10-01 |
| JP7232986B2 (en) | 2023-03-06 |
| CN111750436A (en) | 2020-10-09 |
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