JPH0363444A - Air conditioner - Google Patents

Abstract

PURPOSE:To obtain comfortable space with satisfactory temp. distribution by a method wherein a plurality of radiation temp. sensors are installed at the circumferential parts of a diffuser grill and temp. environment at every part in the room inside is detected and the amount of blowoff air from the diffuser grill is controlled. CONSTITUTION:At the taper parts in the edges of lower surface grill 6 near respective diffuser grills 11-a, 11-b, 11-c, 11-d, radiation temp. sensors 15a, 15b, 15c, 15d are installed respectively and at the windward sides of the diffuser grills 11a, 11b, 11c, 11d damper flaps 16a, 16b, 16c, 16d are installed and the opening areas of respective openings 17a, 17b, 17c, 17d are made variable. The temp. detected by the sensor 15a represents the temp. of the region A in a room 14 and in the same manner the temp. of the regions B, C, D can be detected by the sensors 15b, 15c, 15d and at the opening commensurated to the temp. difference between the set temp. set and actual temp., any of the damper flaps 16a, 16b, 16c, 16d controls the opening.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a ceiling-mounted air conditioner, and particularly to a method for controlling the volume of air blown out of the air conditioner.

Conventional technology The conventional technology will be explained with reference to FIGS. 6 to 8.

1 is an indoor unit of a ceiling-embedded air conditioner, which is fixed to a ceiling wall 2 by a fixing port 3, and the lower surface of the indoor unit 1 is attached to a ceiling 4.
The opening is approximately on the same plane as the opening. The indoor unit 1 consists of an outer shell 5 and a lower grille 6, and therein is an indoor heat exchanger 7-a of a cooling system.

7-b, and a blower 8 is installed so that the air can exchange heat with each of them. A rectangular suction port 10 is provided in the center of the lower grille 6, and around the suction port 1o are air outlet grilles fi/11-a, 11-b.

11-c and 11-d are provided. Approximately half of the air blown from the blower 8 is passed through the heat exchanger 7-a and then into the air outlet IJ.
A/11-a and outlet grilles 11-c and 11-d
It passes through the half opening on the side of the blowout grate A/11-a and blows out diagonally downward. Further, the remaining air blown from the blower 8 passes through the heat exchanger y-b, and is delivered to the outlet grilles 11-b and 11-c.

The structure is such that the air passes through the half opening on the side of the air outlet grille 11-b of 11-d and blows out diagonally downward and forward. In addition, in order to control the direction of each blowing air, the looper 12-a
, 12-b, 12-c, and 12-d are installed. Inside the suction port 1o, the cooling system is set to 0N-OFF.
A suction temperature sensor 13 for control is fixedly installed.

The operation of the conventional ceiling-embedded air conditioner configured in this manner will be explained.

Generally, the air conditioner of the present invention is installed on the ceiling of an office or store to adjust the temperature of a room 14. As an example, the room 14 has a ceiling 4. Floor 1oO9 Wall 102 with window 101. Door 1
It consists of a wall 104 attached to 03. Also, wall with window 10
2 faces south, and sunlight shines into the room 14 from the window 101 as shown by the two-dot chain line. Therefore, when there is sunlight, the area on the wall 102 side of the room 14 is heated, and the temperature on the wall 104 side is also high. At this time, the flow of the blowing air is as shown in FIG.
The air is blown diagonally downward from 11-c and 11-d in a large arc, warming (cooling) the room and then being sucked in from the central suction port 1o of the indoor unit 1.At this time, each airflow a
and b is the airflow volume and direction of airflow over time; airflow a;
.

The streamlines in b all draw arcs of time, etc. By detecting the temperature of the air sucked in in this way by the suction temperature sensor 13, the temperature of the blown air is adjusted, and the average temperature in the room 14 is controlled to be approximately equal to the set temperature.

Problems that the invention aims to solve When installed in a store, office, etc., the amount of load in each part of the room is reduced due to thermal effects such as solar radiation from windows, opening and closing of doorways, and the installation of low heat generation equipment. An imbalance occurs. However, with the conventional method, it is impossible to detect an unbalanced load in the room, and even if the average indoor temperature is approximately at the setting, for example, areas near windows that receive a lot of sunlight may feel too hot. On the other hand, there were problems in that the room felt cold near the entrance and exit, and that it did not provide sufficient air conditioning for comfort.

Therefore, the present invention aims to solve the indoor temperature imbalance.

Means for Solving the Problems In order to solve the above problems, the present invention installs a plurality of radiant temperature sensors around the outlet grill, detects the temperature environment of each part of the room, and detects the temperature environment of each part of the room. By adjusting the amount of air blown from the blow-off grill, imbalances in indoor temperature can be resolved.

Operation: By the means described above, the temperature of each part of the room is detected, and depending on that temperature and the set temperature, the opening area of the air outlet provided inside the air outlet grille ILy is controlled. During heating operation,
In areas where the temperature is lower than the set temperature, the opening of the air outlet is made larger to increase the air volume, and during cooling, the control is reversed from that during heating.

EXAMPLE An example of the present invention will be explained below with reference to FIGS. 1 to 6. Incidentally, the explanation of those having the same structure as the conventional one will be omitted, and only the different points will be described.

Each blowout guri A/11-a, 11-b, 11-c.

11-d Radiation temperature sensors 15a, 15b, and 15c are provided at the tapered ends of the lower surface grooves lJ/L/6, respectively.

15d is provided.

Housing, blowout/I/11a, 11b, 11c.

A stepping motor (not shown) is installed on the windward side of 11d.
damper flap 16a rotatable at .

1ab, 1ac, and 1ad are provided, and each opening 17a
, 17b, 170, and 17d are made variable.

Also, a radiation temperature sensor 15 consisting of the concave mirror 18, a temperature sensor 19 near its focal point, and a cover 20 on the outer surface.
a, 15b, 15c, and 15d are the radiant temperatures T of objects such as desks and floors in areas A, B, C, and D of the room 14.
Detect a, Tb, Tc, 'rd. The temperature difference J in each area depends on the temperature T8゜ set by the resident.
Ta, lTb, Tc, and lTd are calculated by a calculation means (not shown) such as a microcomputer. Each damper flap 16a, 16
b, 16c.

The opening degree of 16d is controlled by a control device (not shown) such as a microcomputer.

lTa, b, c, d = Ta, b, c,
d -Tset Also, this temperature difference ITa, lTb,
JTC, JTd and each damper 16a, 16b, 16c
, 16ci opening degree is as shown in Table 1. During heating, JT
(When the temperature difference is -3℃, the damper is fully opened, and when the temperature difference is small, the opening is decreased, and when JT≧O'C, the damper is fully closed.) During cooling, if JT > 3℃, the damper flap is fully opened, and if the temperature difference is small, the opening is decreased, lτ≦O'C
If so, the control is such that it will be fully closed.

Table 1 The operation of an embodiment of the present invention configured and controlled as described above will be described.

The air sucked in from the suction port 1o is passed through the heat exchangers 7a and 7b by the blower 8, and then sent to each damper flap 1.
6a, 16b, 16c, 16d, air outlet 11a
, 11b, 11C, and 11d. Air outlet 1
The air coming out of 1a is the air in area A of chamber 14 or
Heat is exchanged with objects within that area, and the streamlines of the air flow draw a large arc as they are sucked in through the suction port 1o.

Therefore, the temperature detected by the radiation sensor 15a can be considered to be representative of the temperature in the area A within the chamber 14. Similarly, radiant temperature sensors 15b and 15c+ are used as representative temperatures for each region of B, C, and D.

15d.

Think about trenchless heating operation.

If the temperature distribution in the chamber 14 is uniform, each of A and B.

The temperatures of desks, chairs, lockers, etc. placed in areas C and D are almost the same, and each radiation sensor 15a, 15b
, 15c, and 15d are all the same temperature, and any damper flaps 16a, 16b, f6c, and 16d are opened at an opening commensurate with the temperature difference from the set temperature "set.
will have the same opening degree. Tsu-! Each blowout hole 11a, 11b
, 11c.

The amount of air blown from 11d is controlled to be almost equal.

On the other hand, sunlight shines through the window 106 on one side of the wall of the gravel room 105 in FIG. The temperature detected by the radiation sensor 15a is higher than that in the other regions B, C, and D.

For example, the detected temperature of each sensor is A T a = −0
・6°C91Tb = jTc = 1Tri = −
In the case of 2.5°C, only the damper flap 16a is opened, and the other damper flaps 16b, 16c, 16d are opened.
When X is opened, the amount of air blown from the air outlet 1111 is reduced. Therefore, the amount of hot air flowing into the area A where sunlight is exposed is restricted, and the temperature inside the room 14 can be uniformly distributed.

Also, as shown in ■, there is no solar radiation from the window like I, but room 107
Even if there is a heat load 17 that generates heat from a stove or heater, etc., each damper flap 16 & 1 is designed to reduce the amount of air blown to the warm side and increase the amount of air blown to the cold side.
It controls the opening degrees of 6b, 16c, and 16d.

On the other hand, in the case of air conditioning, see Figure 5! , The air volume control is opposite to ■. Each radiation sensor 15a, 15b, 15c.

The damper flags 16a and 16d are used to detect the temperature of each area and blow out a large amount of cold air to the area where the temperature has become significant due to solar radiation, heat generation, etc., and a small amount of air to the cooler side.
Since the opening degrees of 8b, 18c, and 18d are controlled, it is possible to maintain a very uniform temperature distribution in the room, regardless of whether it is summer or winter, and regardless of the presence or absence of a heat-generating object in the location 2 of the room.

Effects of the Invention Since the present invention is configured as described above, it is possible to use a plurality of radiation sensors to detect unevenness in indoor temperature distribution due to unbalanced indoor heat load, constant sunlight, presence or absence of a heating source, etc. death,
Since the amount of air blown to each area of the room is controlled, it provides a comfortable space with good temperature distribution.

[Brief explanation of drawings]

Fig. 1 is a central sectional view of the air conditioner of the present invention, Fig. 2 is a view of the air conditioner of Fig. 1 seen from below, Fig. 3 is an enlarged sectional view of the main parts of Fig. 1, and Fig. 4 is a sectional view of the air conditioner of the present invention. A diagram of the area of the room, Figure 6 is a sectional view showing the actual installation and usage state, Figure 6 is a view of a conventional air conditioner viewed from below, Figure 7 is a sectional view of the center of Figure 8, Figure 8 shows an indoor air flow diagram for the case of FIG. 11a, b, c, d---Blowout grill, 15a. b, c, ci...Radiation temperature sensor, Ta, b,
c. d...Detected temperature, 16a, b, c, d...
...damper flaps, 17a, b, c, d...
・Opening.

Claims (1)

[Claims] A suction port, an air outlet, a damper flap that opens and closes the air outlet, a temperature setting means that sets the temperature of air blown from the air outlet, and a plurality of pieces arranged inside the air inlet to detect the temperature of the intake air. a radiant temperature sensor, a calculation means for comparing the temperature detected by the radiant temperature sensor and the temperature set by the temperature setting means, and a damper closest to the radiant temperature sensor based on the calculation result of the calculation means. An air conditioner having a control means for controlling the opening/closing angle of a flap.