JPH0363450A - Air conditioner - Google Patents

Abstract

PURPOSE:To eliminate load unbalance in a chamber by a method wherein the temperatures of each section in the chamber are detected, the number of revolution of an air blower is controlled by the temperatures and a set temperature, air quantity to a section higher than the set temperature is inhibited and air quantity to a section lower than the set temperature is increased on heating, and control reverse to the time of heating is executed on cooling. CONSTITUTION:A suction temperature sensor 15 is fixed near a blow-off grill 11-a and a suction temperature sensor 16 near a blow-off grill 11-b on the inside of a suction port 10, and each temperature difference Ta, Tb with a set temperature is arithmetically operated by an arithmetic unit such as a micro-computer. In the case of the chamber 103, when the sun shines through a window 108, the inside of a chamber is warmed partially, the temperature of air sucked is also elevated and Ta> Tb holds at a suction temperature, the blow-off of warm air is reduced to a section warmed as shown in (a) and (b) of A in the stream lines of air blown off at a gentle air mode by an air blower 8-a and at a strong air mode by an air blower 8-b, and the temperature distribution of the whole chamber is kept excellent. A large quantity of cold air is fed to the heated side and air is controlled at the mode of a small quantity of blasting air to the cool side on cooling.

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.

BACKGROUND ART Conventional technology will be explained with reference to FIGS. 4 to 6. 1 is the ceiling wall 2, which is the indoor unit of the ceiling-embedded air conditioner.
The lower surface of the indoor unit 1 is opened onto the ceiling 4 and the time plane. The indoor unit 1 is composed of an outer shell 6 and a lower grille 6. Inside the indoor unit 1, indoor heat exchangers 7-a and 7-b of the cooling system are installed. 8-a, 8-b and blower guides 9-a, 9-b are installed. The air blown from the blower 8-a passes through the heat exchanger 7-a 9 and the outlet grill 11-a.
and the outlet grilles 11 of the outlet grilles 11-C and 11-d.
- Passes through the half opening on the a side and blows out diagonally downward and forward. In addition, the air blown from the blower 8-b is transferred to the heat exchanger y-
b, and the outlet grille 11-b and the outlet grille A/11.
-1, 11-d blowout passes through the half opening on the IJA/11-b side and blows out obliquely downward and forward. A rectangular suction port 10 is provided in the center of the lower face grill/I/6, and around the suction port 10, a blowout grill 1v11 is provided.
-a.

11-b, 11-c, and 1l-ci, and a louver 12-a for controlling the direction of each blowing air.

12-b, 12-('1.12-d are installed.

Inside the suction port 10, the cooling system is turned on and off.
A suction temperature sensor 13 for F control is fixedly installed.

The operation of a conventional ceiling-embedded air conditioner with a groove bottom 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 the room 14.

Room 14 has ceiling 4. It is a space surrounded by floors 1oO2 walls 101, 102, etc., and the indoor unit 1 is installed approximately in the center of the ceiling 4. At this time, the flow of the blowing air is as shown in FIG.
After heating (cooling) the room, the air is blown diagonally downward from 11-d in a large arc like streamlines a and b, and is then sucked into the suction port 1o at the center of the indoor unit 1. At this time,
Each of the airflows a and b has a time-based airflow volume and a direction of dust, and the streamlines of the airflows a and b both draw an arc, such as a path. In this way, the temperature of the air sucked in is detected by the suction temperature sensor 13, and the temperature of the blown air is adjusted so that the average temperature in the room 14 is 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/closing of doorways, and installation of other heat generating equipment. An imbalance occurs. However, conventional methods cannot detect indoor load imbalances, and even if the average indoor temperature is about the same as the setting, for example, areas near windows that receive a lot of sunlight may feel too hot, or vice versa. However, there are disadvantages in that it feels cold near the entrance and exit of the room, and there is a problem in that sufficient comfortable air conditioning cannot be provided.

Therefore, an object of the present invention is to eliminate the imbalance in indoor temperature.

Means for Solving the Problems In order to solve the above problems, the present invention provides a plurality of suction temperature detection means provided inside the suction port, and a temperature setting means for setting the temperature of the air blown out from the air outlet. The groove bottom has a calculation means for comparing the detected temperature and a set temperature, and a control means for controlling the rotation speed of the blower according to the result of the calculation.

Function: By the above means, the temperature of each part of the room is detected, and the rotation speed of the fan is controlled according to the temperature and the set temperature. During heating, the air volume is restricted to the parts where the temperature is higher than the set temperature, and the temperature is adjusted to the set temperature. Also increase the air volume to low areas. In addition, by applying the opposite control during cooling to heating,
This eliminates the load imbalance in the room.

EXAMPLE An example of the present invention will be explained below with reference to FIGS. 1 to 3. Note that explanations of those having the same structure as the conventional one will be omitted, and only the differences will be described.

On the inside of the suction port 1o, a suction temperature sensor 15 is installed near the air outlet I)A/11-a,
A suction temperature sensor 16 is fixed to the b-side.

Further, each temperature difference T1JTb between each of the suction temperature sensors 15 and 16 and a set temperature set by a temperature setting switch (not shown) for setting the blowing temperature is calculated by a calculation device (not shown) such as a microcomputer. calculate. This temperature difference JT is defined by the following equation, and the blowers 8-a and 8-b are controlled according to this JT by a control device (not shown) such as a microcomputer as shown in Table 1.

, JT=(Temperature T detected by the suction temperature sensor 15, 5)
- (set temperature) b = (temperature T detected by suction temperature sensor 16, 6) -
(Set temperature) Also, this temperature difference JT, JTb and each blower 8a.

The correlation between the operating conditions of 8b is shown in the table below, and during heating operation, JT
(If it is -3°C, set the blower to strong wind operation, and if the temperature difference decreases, reduce the blower operation,
T) Perform control to stop when Q is reached. On the other hand, during cooling operation, if the temperature difference is JT) 3℃, the blower will be operated strongly, and if the temperature difference is small, the blower operation will be weakened.
When the temperature reaches 0'C, control is performed to stop the operation.

Table 1 The operation of an embodiment of the present invention configured and controlled as described above will be described. I'll explain that I'm busy with heating.

If there is no variation in the temperature distribution in the room 14, the temperatures detected by the suction temperature sensors 15 and 16 will be the same, and the blowers a-a and s-b will blow out the same amount of air.

On the other hand, as shown in A in Figure 3, the ceiling is 1o4. Floor 1o6゜Wall 10
6. In the case of a room 103 configured with a wall 107 or the like with a window 108, if sunlight shines through the window 108, the temperature in the sunny area will rise, causing temperature unevenness between the left and right sides of the room. For this reason, the outlet grill 11-a.

The high temperature air blown out from 11-b warms the room and is then sucked into the central suction port 1o of the indoor unit 1. Therefore, if the inside of the room is partially warmed by sunlight, the temperature of the suctioned air will also be high, so when comparing the suction temperature "15" and T16, "15>"16.For example, (Ta = 1℃,
If 1Tb=4°C, the blower 8-a will be in the light wind mode and the blower 8-b will be in the strong wind mode. Therefore, the streamlines of the blown air look like a and b in A. The amount of warm air blown out to areas warmed by sunlight is small, maintaining a good temperature distribution throughout the room. Also like B, window 108
is covered by the curtain 109 and there is a heat load such as the heater 17 in a part of the room, or there is not only sunlight from the window 108 as shown in C, but there is also a door 1B on the opposite wall 109. is installed, and when the temperature distribution is extremely poor such as when this door 18 is open, even if the button is pressed, a large amount of air is blown on the cold side, and a small amount of air is blown on the warm side, so that horizontal control is performed.

On the other hand, in the case of air conditioning, contrary to cases A, B, and C in Figure 3, a large amount of cold air is sent to the hot side due to sunlight 2 heat generation, etc., and a small amount of air is blown to the cooler side. Since it is controlled so as to maintain a very uniform temperature distribution in both summer and winter, even indoors where variations in room temperature are likely to occur due to radiation, heating, etc., it is possible to ensure a very uniform temperature distribution.

Effects of the Invention Since the present invention is configured as described above, it can detect unevenness in temperature distribution due to indoor heat load imbalance, uneven sunlight, presence or absence of a heating source, etc., and control the amount of air blown. This has the effect of making it possible to make the indoor temperature distribution uniform.

[Brief Description of the Drawings] Fig. 1 is a plan view of the air outlet of the air conditioner of the present invention, Fig. 2 is a central sectional view of Fig. 1, and Fig. 3 is the blower air flow line in the case of Fig. 1. 4 is a plan view of a blowing part of a conventional air conditioner, FIG. 6 is a sectional view of the center of FIG. 4, and FIG. 6 is a flow line diagram of the blower in the case of FIG. 4. sa, ab...Blower, 10...Suction grill 111a, 1lb, 110,
11 d-・-・・Blowout grill, 15.16・・・
...Temperature sensor.

Claims (1)

[Claims] an inlet, an outlet, a plurality of blowers provided downstream of the inlet and upwind of the outlet, a temperature setting means for setting the temperature of the air from the outlet, and a plurality of blowers provided inside the intake grille. temperature detection means for detecting the temperature of the suction port; calculation means for comparing the temperature detected by the temperature detection means with the temperature set by the temperature setting means; and calculation results of the calculation means. and control means for controlling the rotation speed of the blower closest to the temperature detector.