JPH0240424A - Ceiling-embedded type air-conditioning machine - Google Patents

Abstract

PURPOSE:To improve spatial temperature distribution by a method wherein an inner wall and an outer wall, positioned at the upstream side of an air outlet port blowing air-conditioned air, are provided with slanted surfaces having a predetermined angle between the surface of a ceiling. CONSTITUTION:The outer wall 16 and the inner wall 17a of an air outlet port 11a (the same as the outlet port at the opposite side of a suction port 10) having the size of (a)X(b) (a>b) are formed so as to be slanted surfaces having the angle of inclination of 50-70 degrees with respect to the surface 11c of a ceiling at the upstream side of the air outlet port 11a. The angle of inclination is designed so that a temperature difference between the upper part and the lower part of a living area is minimized. A smooth arced surface, having a radius R larger than the width (b) of the outlet port 11a, is formed at a connecting part between a decorative grille 18 and the outer wall 16. On the other hand, the inner wall 17a is provided with an airflow direction control panel 19a. According to this constitution, a temperature difference between the upper part and the lower part of the living area may be minimized and a temperature distribution may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ceiling-embedded air conditioner, and particularly to an improvement in the temperature distribution of an air-conditioned space obtained by the ceiling-embedded air conditioner.

2. Description of the Related Art The prior art will be explained with reference to FIGS. 8 to 13.

1 is an indoor unit of a ceiling-embedded air conditioner, and 2 is a ceiling wall. A fixing bolt 3 fixes the indoor unit 1 to the ceiling wall 2. 4 is the ceiling. Reference numeral 5 denotes an outer shell of the indoor unit, which opens on substantially the same plane as the ceiling 4. Reference numeral 6 denotes a decorative plate grille, which is attached to the opening of the outer shell 5. 7a.

7b is an indoor heat exchanger of the air conditioning system. 8 is a blower. 9a and 9b are the casings of the blower. 1
o is an indoor air intake port, which is provided in the center of the decorative grille 6 and has a rectangular shape. 11a,
Reference numeral 11b is a blowout port for the air that has undergone heat exchange by the heat exchangers 7a and 7b, and is provided around the suction port 10. 12a and 12b are the air outlet 11a11
This is a rotatable louver for controlling the direction of air blown out from 1b. 13 is the air conditioning system 0N-O
This is an intake air temperature sensor for FF control.

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

First, air heated (cooled) by the heat exchangers 7a and 7b is blown out diagonally downward from the air outlets 11a and 11b. The flow of this blown air draws a large arc as shown in FIG. 11, and after warming (cooling) indoor air and objects, it is sucked in through the suction port 10. At this time, each blowout airflow flows out into the room 14 from the blowoff ports 11a and 11b and is exposed to the atmosphere. Due to friction with the surrounding still air, the speed decreases as the distance from the air outlets 11a and 11b increases, and at the height of the air outlet, the air velocity decreases.
Since the vertical wind speed is 0, the air is sucked toward the suction port 10. The blown air reaching point is the blown air reaching distance of the indoor unit 1, and heats (cools) the air and objects in the range from the ceiling to the blown air reaching point I.

The suction air temperature sensor 13 installed inside the suction port 10 determines whether the air conditioning system is ON-OF or not.
F, and temperature control is performed so that the temperature in the room 14 is maintained at the set temperature.

Problems to be Solved by the Invention However, in the above configuration, the air outlet 11a,
Due to friction with the surrounding still air, the air blown out from 11b immediately decelerated even if a large initial velocity of dust was applied, and the distance the blown air traveled was shortened. In other words, since the temperature-controlled air does not reach the floor sufficiently, the hot air stays near the ceiling during heating, which has the disadvantage of making the area around the head hot and the feet cold, as shown in Figure 13. Ta.

Moreover, if the initial velocity dust of the blown air is increased in order to increase the reaching distance of the blown air, the blowing holes 11a, 1
There are various drawbacks such as the extremely high wind speed near 1b, which people feel uncomfortable, and the noise of the blower 8 that increases as the air volume increases.

Furthermore, during cooling, even if the airflow direction is controlled using a louver, the cold air does not blow out completely parallel to the ceiling, and as shown in FIG. 12, it has the disadvantage that it is difficult to reach the end of the room 14.

The present invention solves the above problems, and aims to provide a ceiling-embedded air conditioner that provides a good indoor temperature distribution.

Means for Solving the Problem In order to achieve this object, the ceiling-embedded air conditioner of the present invention has dimensions a x b (a
> b) The inner wall and outer wall located upstream of the air outlet,
The surface is inclined at an angle of 60 to 700 degrees from the ceiling surface.

With this configuration, when heating and cooling are started, warm air is smoothly blown diagonally downward along the slopes of the inner and outer walls, quickly cooling and heating the room, and reducing the temperature difference between the upper and lower areas of the living area.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 7. Note that the same parts as in the conventional example are given the same reference numerals and detailed explanations are omitted.

11a and 11b are air outlets with dimensions a x b (a>b). 11c is a ceiling surface of the ceiling 4 on the indoor side. 15a and 15b are wide air outlets. Reference numeral 16 denotes an outer wall of the air outlet ducts 15a and 1sb, and the indoor unit 1
It is made up of an outer shell. 1. Reference numerals 1 and 17b are inner walls on the downstream side of the air outlet passages 15a and 15b. The outer wall 16
And the inner walls 17a, 17b have air outlets 11a, 11b.
It is formed on the sloped surfaces of the ceiling surfaces 11c and 60' on the upstream side of the ceiling. This inclination angle 60' is the optimum angle during heating operation determined through experiments, and as shown in FIG. 5, the difference in temperature between the upper and lower sides of the living area is minimized. 18 is a decorative board,
The air outlet 11a is provided at the joint portion with the outer wall 1e.

A smooth circular arc surface with a large radius H is formed across the width of 11b. Reference numerals 19a and 1sb are wind direction control plates, which have rotational fulcrums on the upstream side of the inner walls 17a and 17b. Reference numerals 20a and 20b are stepping motors that drive the wind direction control plates 19a and 19b. Reference numeral 21 denotes a stepping motor driving microcomputer that determines the difference between the air temperature detected by the intake air temperature sensor 13 and the set temperature and sends a driving signal to the stepping motors 20a and 20b.

The operation of the ceiling-embedded 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, heated or cooled by the heat exchangers ya and yb, and is then heated or cooled by the outer wall 16 and the inner walls 17a and 17b.
The wind direction control plate 19a flows along the ceiling surface and the 60° slope formed in the wind direction control plate 19a.

The wind direction is controlled by the air blower 19b, and the air is blown out from the blower ports 11a and 11b.

First, when heating and cooling start up, as shown in FIG. 3, the wind direction control plates 19a, 19b are
17b. Due to this, the heat exchanger 7
a. The air blown out flows along the slopes provided on the outer wall 16 and the inner walls 17a, 17b, and diagonally downwards from the air outlets 11a, 11b at an angle of 60' with the ceiling surface 11C. Blow out, room 14 is ♀〈Heating is not yet cooling.

Next, when the air temperature detected by the suction air temperature sensor 13 reaches the set temperature, a signal is sent from the stepping motor driving microcomputer 21 to activate the stepping motors 20a and 20bli6. Accordingly, as shown in FIG. 4, the wind direction control plates 19a and 19b are driven to make the angle of the blown air slightly shallower.

As a result, the air blown out from the air outlets 11a and 11b is blown out while adhering to the arcuate surface provided on the decorative grille 18. This is called the adhesion effect, and the blown air flows along the ceiling, reaches the end of the chamber 14, and circulates widely within the chamber 14.

When the difference between the air temperature detected by the suction air temperature sensor 13 and the set temperature becomes large, a signal is transmitted from the stepping motor driving microcomputer 21 to drive the stepping motors 2oa and 2ob, as shown in FIG. As shown in FIG. 3, the wind direction control plates 19a and 19b are brought into close contact with the inner walls 17a and 17b. In this case, the air blown out from the air outlet 118.11b is blown out diagonally downward at an angle of 60' with the ceiling surface 11C.
quickly bring the temperature closer to the set temperature.

Then, the above operation is repeated until the stepping motor driving microcomputer 21 determines the difference between the air temperature detected by the suction air temperature sensor 13 and the set temperature.

As described above, according to this embodiment, dimensions a, X b(a
) b) The ceiling surface 1 is located on the outer wall 16 and the inner walls 17a, 17b located upstream of the air outlets 11a, 11b.
By forming slopes of 1c and 60', hot or cold air is blown out at an angle that minimizes the difference in temperature between the upper and lower sides of the living area when heating and cooling are started, thereby quickly heating or cooling the room.

By forming a smooth circular arc surface with a large radius R across the widths of the air outlet ports 11a and 11b at the joint portion of the decorative plate grille 18 with the outer wall 16, an adhesion effect can be obtained.

Then, the wind direction control plates 19a, 1sb having rotational fulcrums on the upstream side of the inner walls 17a, 17b, and the stepping motors 20a, 2 for driving the control plates 19a, 1sb.
By providing a stepping motor drive microcomputer 21 that sends drive signals to the stepping motors 20a and 20b, when the indoor temperature reaches the set temperature, the stepping motor drive microcomputer 2
A driving signal is transmitted from the stepping motor 1 to the stepping motors 20a and 20b, and the wind direction control plates 1sa and 19b are driven to control the direction of the blown air.

At this time, due to the adhesion effect, the wind direction control plates 19a, 1
Even if the driving range of sb is small, a blowing airflow that is horizontal to the ceiling surface 11c can be obtained, and the decrease in air volume is small.

As a result of these, hot air or cold air reaches the end of the chamber 14 as shown in FIG. 6, circulates widely within the chamber 14, and spreads in the vertical direction of the room as shown in FIG. It is possible to obtain a temperature distribution with small temperature differences. In addition, hot air and cold air do not directly hit people, making it possible to prevent discomfort caused by air currents.

Effects of the Invention As described above, the present invention has the following advantages:
By forming slopes at an angle of 50' to 70° from the ceiling on the inner and outer walls located upstream of the air outlet of X b (a > b), it is possible to To provide a ceiling-embedded air conditioner that can minimize the difference in temperature between the top and bottom and create a comfortable space.

[Brief explanation of the drawing]

FIG. 1 is a central cross-sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention, and FIG. 2 is a schematic view from below corresponding to FIG.
Figure 3 is an enlarged sectional view of the main parts during start-up operation equivalent to Figure 1;
Figure 4 is an enlarged sectional view of the main part during stable operation equivalent to Figure 1, Figure 5 is a diagram showing the relationship between the vertical temperature difference in the living area and the air outlet angle during heating, and Figure 6 is equivalent to Figure 1. Figure 7 is an air flow diagram during stable operation, Figure 7 is an indoor temperature distribution diagram of the X-X cross section equivalent to Figure 6, Figure 8 is a conventional central tr view, Figure 9 is a lower view equivalent to Figure 8. Fig. 10 is an enlarged sectional view of the main part equivalent to Fig. 8, Fig. 11 is an air flow diagram during heating corresponding to Fig. 8,
FIG. 12 is an air flow diagram during cooling corresponding to FIG. 8, and FIG. 13 is an indoor temperature distribution diagram of the cross section taken along line X-X of Osho in FIG. 11. 11a111b...Air outlet, 11C...
・Ceiling part, 1sa, 15b...Blowout air path, 16
...-outer shell, 17a, 17b...inner wall,
18... Decorative board grill, 19a, 1s
b・-=-・Wind direction control board, 20a, 20b...
Nustepping motor 21...Microcomputer for driving the stepping motor. Name of agent: Patent attorney Shigetaka Awano and 1 other person8-
・ 10 ... 11a, II &・'- 1/c --- ノ! -ri tsb・■Enmai includedη Extruding ceiling (exit O−− 11,・−・+1c・・13 −・T5a・・16 °−!h ゛18 −・I9a −・・Rice 21 outlet Ball #face Yuikin 1 屓Zn blowing note Fucho outside wall inside wall 1st wall η King removal Uri J Shio Do - J Meng tai N 餉F!! Figure 10a Figure 11 Figure 13

Claims (1)

[Claims] The inner and outer walls located upstream of the air outlet with dimensions a x b (a>b) from which temperature-controlled air is blown out are equipped with sloped surfaces at an angle of 50° to 70° from the ceiling surface. Included air conditioner.