JP2644837B2 - Ceiling-mounted air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted air conditioner, and more particularly to an improvement in a temperature distribution of an air-conditioned space obtained by the ceiling-mounted air conditioner.

2. Description of the Related Art A conventional technique will be described with reference to FIGS.

1 is an indoor unit of an air conditioner embedded in a ceiling, and 2 is a ceiling wall. Reference numeral 3 denotes a fixing bolt, and the indoor unit 1 is
Fixed to 4 is a ceiling. Reference numeral 5 denotes an outer shell of the indoor unit, which is open on substantially the same plane as the ceiling 4. A decorative plate grill 6 is attached to the opening of the outer shell 5. 7a and 7b are indoor heat exchangers of the air conditioning system. 8 is a blower. 9a and 9b are blower casings. Reference numeral 10 denotes a suction port for indoor air, which is provided at the center of the decorative plate grill 6 and has a square shape. 11
Reference numerals a and 11b denote air outlets for heat exchanged by the heat exchangers 7a and 7b, and are provided around the inlet 10. Reference numerals 12a and 12b denote rotatable louvers for controlling the direction of air blown from the outlets 11a and 11b.
Reference numeral 13 denotes a suction air temperature sensor for ON / OFF control of the air conditioning system.

The operation of the air conditioner configured as described above will be described below.

First, air heated (cooled) by the heat exchangers 7a and 7b is blown obliquely downward from the outlets 11a and 11b. The flow of the blown air draws a large arc as shown in FIG. 11, and after warming (cooling) the room air and the object,
More sucked. At this time, each blown airflow flows out of the blowout ports 11a and 11b into the room 14, and is released to the atmosphere. Then, due to friction with the surrounding still air, the outlet 11
The velocity decreases as the distance from a, 11b increases, and the vertical wind speed of the room 14 becomes 0 at the height of the blowing air arrival point I,
It is sucked toward the suction port 10. The outlet air arrival point I is the outlet air arrival distance of the indoor unit 1, and heats (cools) air or an object in a range from the ceiling to the outlet air arrival point I. And the suction port 10
The air conditioning system is turned on and off by the suction air temperature sensor 13 installed inside the air conditioner, and temperature control is performed so that the temperature of the room 14 is maintained at the set temperature.

Problems to be Solved by the Invention However, in the above configuration, the outlets 11a, 11
The air blown out from b was decelerated immediately after giving a large initial velocity due to friction with the surrounding still air, and the blown air travel distance was short.
In other words, because the temperature-controlled air does not reach the floor sufficiently, warm air stays near the ceiling during heating, and as shown in Fig. 13, there is the disadvantage that the area near the head is hot and the feet become cold. Was.

When the initial velocity of the blown air is increased to increase the blown air reach, the blowout ports 11a, 11b
The vicinity has a very high wind speed, and has various drawbacks such that a person feels uncomfortable or the noise of the blower 8 increases with an increase in the air volume.

Further, during cooling, even if the wind direction is controlled with a louver, the typical wind does not blow out completely in parallel with the ceiling, and has a drawback that it is difficult to reach the end of the room 14 as shown in FIG.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a ceiling-embedded air conditioner capable of obtaining a good indoor temperature distribution.

Means for Solving the Problems In order to achieve this object, a ceiling-embedded air conditioner according to the present invention is provided with a decorative panel grille having an outlet for blowing temperature-controlled air, and a decorative panel grill parallel to each other. 50 from ceiling
An inner wall and an outer wall having an inclined surface which is inclined toward an outer peripheral side of the decorative panel grill so as to face downward at an angle of ゜ to 70 °, and an inner wall and an outer wall constituting an air passage on an upstream side of the outlet, and the outlet in the decorative panel grill An arc surface that makes a horizontal plane formed on the outer peripheral side of the outer wall and an inclined surface of a joint portion between the outer wall and the decorative plate grille continuous with a smooth curve; and the inner wall rotatably in a direction in which a lower end approaches the outer wall. And a wind direction control plate provided at the downstream end of the air conditioner.

Operation With this configuration, when blowing downward, the wind direction control plate is brought into close contact with the inner wall, and the hot or cold air smoothly flows along the inclined surface of the inner wall and the outer wall at an angle at which the vertical temperature difference in the living area diagonally below is minimized. Air blows and cools and heats the room quickly.

Also, at the time of horizontal blowing, the wind direction control plate is rotated so that the lower end of the wind direction control plate approaches the outer wall, and the air flow to be blown is attached to the circular arc surface of the decorative plate grill. Air can flow along the surface,
The decrease in air volume is small, the room circulates largely, and the temperature difference between the top and bottom of the living area is reduced, and the temperature distribution in the living area is made uniform.
It is possible to form a comfortable space by eliminating the occurrence of discomfort caused by the hot or cold wind directly hitting a person.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted.

The ceiling-embedded type air conditioner of the present embodiment has a decorative plate grill 18 formed with air outlets 11a and 11b of dimensions a × b (a> b) for blowing out temperature-controlled air, and a veneer grill 18 in parallel with each other. Equipped with a slope that slopes toward the outer periphery of the decorative panel grill 18 so that it goes downward at an angle of 60 ° from the ceiling surface 11c (the optimal angle during heating operation that minimizes the vertical temperature difference in the living area obtained through experiments). The inner walls 17a, 17b and the outer wall 16 constituting the downstream portion of the outlet air passages 15a, 15b having a width b on the upstream side of the outlets 11a, 11b, and the outer peripheral side of the outlets 11a, 11b in the decorative plate grill 18 are formed. And a circular arc surface having a radius R larger than the width b of the outlets 11a and 11b for making the horizontal plane and the inclined surface of the joint between the outer wall 16 and the decorative panel grill 18 continuous with a smooth curve, and a direction in which the lower end approaches the outer wall 16 Wind direction control plates 19a, 19b provided at the downstream ends of the inner walls 17a, 17b so as to be rotatable, and a step for driving the wind direction control plates 19a, 19b. A ring motor 20a, and 20b, to determine the difference between the air temperature and the set temperature detected by the intake air temperature sensor 13, the stepping motor 20a, and a stepping motor drive microcomputer 21 for transmitting the driving signal to 20b.

The operation of the ceiling-mounted air conditioner configured as described above will be described below.

First, the air sucked in from the suction port 10 is sent out by the blower 8 and is heated or cooled by the heat exchangers 7a and 7b. Then, the ceiling surface formed on the outer wall 16 and the inner walls 17a and 17b has a height of 60 °. It flows along the inclined surface, and the wind direction control plate 19
The wind direction is controlled by the
It is blown out from 1a, 11b.

First, at the start of heating and cooling, the wind direction control plates 19a and 19b are brought into close contact with the inner walls 17a and 17b as shown in FIG. As a result, the air blown out of the heat exchangers 7a, 7b flows along the inclined surfaces provided on the outer wall 16 and the inner walls 17a, 17b, and the ceiling surfaces 11c, 60b from the outlets 11a, 11b. The air is blown obliquely downward at an angle of ゜ to heat or cool the room 14 quickly.

Next, when the air temperature detected by the suction air temperature sensor 13 reaches the set temperature, a signal is transmitted from the microcomputer 21 for driving the stepping motor to drive the stepping motors 20a and 20b. Thereby, as shown in FIG. 4, the wind direction control plates 19a and 19b are driven to slightly reduce the angle of the blown air.

As a result, the air blown out from the outlets 11a and 11b adheres to the arc surface provided on the decorative plate grill 18 and is blown out. This is called an adhesion effect, and the blown air flows along the ceiling, reaches the end of the chamber 14, and largely circulates in the chamber 14.

Then, when the difference between the air temperature detected by the suction air temperature sensor 13 and the set temperature increases, a signal is transmitted from the microcomputer 21 for driving the stepping motor, and the stepping motors 20a and 20b are driven, and FIG. As shown in the figure, the wind direction control plates 19a, 19b are brought into close contact with the inner walls 17a, 17b. Thereby, the air blown out from the outlets 11a and 11b blows obliquely downward at an angle of 60 ° with the ceiling surface 11c, and the temperature of the chamber 14 quickly approaches the set temperature.

The above operation is repeated by determining the difference between the air temperature detected by the suction air temperature sensor 13 and the set temperature by the microcomputer 21 for driving the stepping motor.

As described above, the ceiling-embedded air conditioner of the present embodiment has the air outlet 11 of the size a × b (a> b) for blowing out the temperature-controlled air.
a veneer grille 18 having a, 11b formed therein, and an inclined surface which is inclined parallel to each other and on the outer peripheral side of the veneer grille 18 so as to face downward at an angle of 60 ° from the ceiling surface 11c, respectively.
Inner walls 17a, 17b and an outer wall 16 which constitute downstream portions of the outlet air passages 15a, 15b having a width b on the upstream side of 11a, 11b, and a decorative plate grill 18
Of a radius R larger than the width b of the outlets 11a and 11b, which makes the horizontal plane formed on the outer peripheral side of the outlets 11a and 11b and the inclined surface of the joint between the outer wall 16 and the decorative plate grill 18 continuous with a smooth curve. An arc surface and a wind direction control plate 19 provided at the downstream end of the inner walls 17a, 17b so that the lower end can rotate in a direction approaching the outer wall 16.
a, 19b, stepping motors 20a, 20b that drive the wind direction control plates 19a, 19b, and blow out downward if the difference between the air temperature detected by the suction air temperature sensor 13 and the set temperature is large, and And a stepping motor drive microcomputer 21 for transmitting a drive signal to the stepping motors 20a and 20b so that the air flows out along the ceiling when the temperature of the air reaches the set temperature. The control plates 19a, 19b are closely attached to the inner walls 17a, 17b, and warm air or cold air is blown smoothly at an angle where the vertical temperature difference of the living area becomes diagonally downward along the inclined surface of the inner wall and the outer wall, and the inside of the room Heat and cool quickly.

Then, when the detected air temperature reaches the set temperature, the air direction control plates 19a, 19b are rotated so that the lower ends of the air direction control plates 19a, 19b approach the outer wall 16, and the air blown out without increasing the ventilation resistance. The flow is adhered to the arc surface of the decorative panel grill 18, and due to the adhesion effect, the air is blown out horizontally even if the rotation angle of the wind direction control plates 19a, 19b is small, and as shown in FIG. 6, air flows along the ceiling surface 11c. Can be flowed, the air volume decreases little, reaches the end of the chamber 14 and circulates greatly in the chamber 14,
As shown in Fig. 7, the temperature difference between the upper and lower areas of the living area is reduced, the temperature distribution in the living area is made uniform, and the generation of discomfort due to direct contact of hot or cold air with humans is eliminated, forming a comfortable space. can do.

Effects of the Invention As described above, the ceiling-embedded air conditioner of the present invention has a decorative plate grill having an outlet for blowing out temperature-controlled air, and a decorative plate grill parallel to each other and 50 ° from the ceiling surface, respectively. ~
An inner wall and an outer wall having an inclined surface which is inclined toward an outer peripheral side of the decorative panel grill so as to face downward at an angle of 70 ° and constituting an air passage on an upstream side of the outlet, and an outer periphery of the outlet in the decorative panel grill An arc surface that makes a horizontal plane formed on the side and an inclined surface of a joint portion between the outer wall and the decorative panel grille continuous with a smooth curve, and a lower end rotatable in a direction approaching the outer wall so as to be downstream of the inner wall. Since it has a wind direction control plate provided at the end, when blowing downward, hot air or cold air blows out at an angle that minimizes the vertical temperature difference in the living area, it is possible to cool and heat the room quickly, and along the ceiling surface when blowing horizontally The air flow can be reduced and the air volume can be reduced, the air volume can be reduced, the room can be circulated largely, the temperature difference between the upper and lower areas of the living area can be reduced, the temperature distribution in the living area can be made uniform, and hot or cold air can directly hit humans. Causes discomfort Lost, it is possible to form a comfortable space.

[Brief description of the drawings]

FIG. 1 is a central sectional view of a ceiling-mounted air conditioner according to one embodiment of the present invention, FIG.
FIG. 3 is an enlarged sectional view of a main part during a start-up operation corresponding to FIG. 1,
FIG. 4 is an enlarged sectional view of a main part during stable operation equivalent to FIG. 1, FIG. 5 is a diagram showing a relationship between a vertical temperature difference in a living area during heating and a blowing angle, and FIG. 6 is equivalent to FIG. 7 is an air flow diagram at the time of stable operation, FIG. 7 is a room temperature distribution diagram of an XX section corresponding to FIG. 6, FIG. 8 is a conventional center sectional view, and FIG. FIG. 10 is an enlarged sectional view of a main part corresponding to FIG. 8, FIG. 11 is an air flow diagram at the time of heating corresponding to FIG.
FIG. 13 is an air flow diagram during cooling corresponding to FIG. 8, and FIG. 13 is a room temperature distribution diagram of a section XX corresponding to FIG. 11a, 11b …… Outlet, 11c …… Ceiling surface, 15a, 15b …… Outlet airway, 16 …… Outer shell, 17a, 17b …… Inner wall, 18 …… Veneer plate grill, 19a, 19b …… Wind direction control Board, 20a, 20b …… Stepping motor. 21 ... Microcomputer for driving a stepping motor.

Claims (1)

(57) [Claims] 1. A decorative plate grill having a blow-off opening for blowing air of a controlled temperature, and an outer periphery of the decorative plate grill parallel to each other and downward at an angle of 50 ° to 70 ° from a ceiling surface. An inner wall and an outer wall having an inclined surface inclined to the side and constituting an air passage on the upstream side of the outlet, a horizontal plane formed on an outer peripheral side of the outlet in the decorative plate grill, the outer wall, and the decorative plate grill; Embedded in a ceiling having an arcuate surface that makes the inclined surface of the joint part continuous with a smooth curve, and a wind direction control plate provided at the downstream end of the inner wall so that the lower end can rotate in a direction approaching the outer wall. Type air conditioner.