JPS6249149A - Indoor air conditioning system - Google Patents

Abstract

PURPOSE:To make it possible to positively conduct a proper control of the system using a compact device by repeating the control in two stages, that is, changing an air flow distributing amount in accordance with the difference between temperatures at respective portions, and then conducting the operation of an air conditioner in accordance with the necessary supply amount of each room. CONSTITUTION:The controll of the first stage is carried out in such a manner that the room temperatures are detected by temperature sensors 3 and 4 of rooms 1 and 2, the difference between the room temperatures is used as a deviation signal by a differential temperature adjustor 15 and movable motors 9 and 10of dampers 7 and 8 mounted on ducts 5 and 6 are operated in accordance with the signal thereby to change the opening degree of dampers 7 and 8. As the second stage control, the room temperatures are detected by the temperature sensors 3 and 4, a logical operation is carried out by a power source control device 16, and the ON-OFF control of a heat supplier 13 is carried out by sending a signal to an operating part 14. To the ON-OFF control of the heat source of the second stage, with a control to decrease the temperature difference between respective room in the first stage, and this operation is repeated. Thus, only by adding simple facilities, the irregularly of the temperature in respective rooms which is caused by the difference in the thermal characteristics is corrected thereby to carry out a proper control.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for air conditioning in a building when a plurality of rooms or locations are targeted.

[Conventional technology]

BACKGROUND OF THE INVENTION An air conditioner for a building usually includes an air conditioner and a duct, and the air conditioner includes a blower and a cooling or heating device. In order to maintain the temperature inside the room at a certain predetermined temperature, cold air or hot air is supplied through the duct, but the amount of heat required to be supplied to the room varies depending on the time of day, orientation, and thermal characteristics of the room. In contrast, in the conventional method,
The temperature of a representative room among a plurality of rooms is detected and compared with the target temperature, and the amount of heat supplied by the cooling or heating device of the air conditioner is controlled on and off to compensate for the difference.

The same applies to large rooms that are not divided into multiple rooms, where several zones with different thermal conditions are set and the air conditioning is controlled by detecting the temperature of the representative zone.

[Problem that the invention seeks to solve]

In such conventional control methods, temperatures in rooms other than the representative room are not subject to control, and temperature variations tend to increase from room to room. In order to control the temperature of multiple rooms to the required temperature and reduce the variation in temperature between each room, the temperature of as many rooms as possible is detected, and the air flow is adjusted to supply the required amount of heat to each room. It will be necessary to change the .

For this reason, the equipment requires a means to vary the amount of air supplied to each room, a means to vary the amount of air blown by the air conditioner, a means to vary the amount of heat supplied, etc., making the entire equipment complex and large. At the same time, the system becomes expensive in terms of cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide an indoor air conditioning method that eliminates the disadvantages of the conventional example and allows proper control to be reliably performed with a simple device.

[Means for solving problems]

In order to achieve the above object, the present invention changes the air distribution amount according to the temperature difference between each location as a first step when blowing air from one air conditioner to multiple locations via a duct,
In the second stage, the operation of the air conditioner is controlled according to the amount of heat required to be supplied to each room, and the two-stage control is repeated.

[Effect]

According to the present invention, firstly, by changing the amount of air distributed to each location, it is possible to reduce the variation in temperature in each room caused by fluctuations in the amount of heat required to be supplied to each location, and then to adjust the temperature of the air machine to the appropriate temperature. On/off control.

Furthermore, the air distribution amount can be changed simply by adding a damper to the duct, and can be realized with simple equipment.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the indoor air conditioning system of the present invention, in which 1.2 is each room, 11 is a blower 12, and a heat supply device that produces cold air and hot air for cooling or heating. 1
The room 1.2 and the air conditioner 1 are connected by a duct 5.6 branching from the middle.

Rooms 1 and 2 each have a temperature sensor 3 for detecting room temperature.
.
On the other hand, dampers 7.8 for controlling the wind 9 are arranged in the ducts 5, 6.

In the figure, reference numerals 9 and 10 are damper movable motors (modutrol motors) that adjust the opening degree of the damper 7.8, and as shown in (b), the temperature detection output signals of the temperature sensors 3 and 4 are used to adjust the temperature difference. 15 into the drive circuit of the motor 9.10. FIG. 2 is a circuit diagram showing an example of such a temperature difference regulator 15, in which the detected temperatures T1.4 of the temperature sensor 3.4. T
2 is converted into voltage by temperature-voltage converters 17 and 18, the difference ΔV between the respective voltages V1 and 2 is taken, and the proportional controller 20 which sets the opening degree according to the difference controls the damper movable motor 9. 10. At this time, motor 9
The movement of 10° is a forward rotation and a reverse rotation, and when one damper opens, the other damper closes.

Further, as shown in (c), the outputs of the temperature sensors 3 and 4 are introduced into the operating device 14 via the heat source control device 16.

The equipment configuration has been described above, and the system of the present invention is performed using such equipment by repeating the following two-stage control.

The first stage control consists of chamber 1. The room temperature is detected by the temperature sensor 3.4 in the room 2, the difference in room temperature is used as a deviation signal by the difference temperature adjuster 15, and the movable motor 9, By operating 10, the opening degree of the damper 7°8 is changed.

At this time, the opening degrees of the differential temperature controller 15 and the damper 7.8 are set as shown in Figure 3 as an example, and the larger the difference in room temperature, the lower the room temperature during heating, and the higher the room temperature during cooling. Make sure to blow more air into the room. However, the opening degree of the damper is a constant value A
% or more, and set it so that it does not fully close.

As a result, the air distribution amount changes so that the temperature difference between chamber 1 and chamber 2 becomes smaller. In this case, only the ratio of the amount of air blown to chamber 1 and room 2 changes, and the amount of air blown by the blower 12 remains constant.

As the second stage control, room 1. Room 2 temperature sensor 3
．． 4 detects the room temperature, the heat source control device 16 performs logical operations, and sends a signal to the operating device 14 to control the heat supply device 13 on and off.

As shown in FIG. 4, this heat source control device 16 sets a target value TD and an operating gap 2d, and sets TD-d and TD+.
A logical operation is performed such that ON and OFF operations are repeated between d. Calculation flow-IJ As shown in FIG. 5, the calculation is as follows.

That is, in the heat source control device 16, the temperature sensor 3.4
Room 1 detected by A logical operation is performed on the room temperature T1゜T2 of room 2, and when cooling, [(T1≧TO+d)l
(T2≧1”D+d)) then “ON((T1≦TD
d) /1 (T2 ≦TD d) ) If t, turn it off, and when heating [(T1≦TD-d) '
J (T2 ≦TD d) ), then “ON”, ((
Tt, i=”ro +d) n (T2 ≧TO+d
)) If so, send a signal to the controller 14 to turn it "OFF".

FIGS. 6 and 7 specifically illustrate the results of such control during cooling and heating, respectively. this house,
In the case of Figure 6, the 0 point is T and both 1 and T2 are TD-d.
It turns off when it reaches , and the 0 point is 'r1 and T
2 is turned ON when either of them reaches TD→-d. On the other hand, in the case of FIG. 7, the 0 point turns OFF when both T1 and T2 reach TD+d, and the 0 point turns ON when either T or T2 reaches TO-d.

In addition, the present invention adds and repeats the on-off control of the heat source in the second stage as described above with the control to reduce the temperature difference between each room in the first stage, thereby achieving the intended purpose of reducing the temperature difference in each room. It is possible to control the temperature to eliminate uniformity and maintain the target temperature in each room.

Among the results of such control, the predicted temperature change during heating is plotted and shown in FIG.

In addition, although the above-mentioned embodiment showed the temperature control method for two rooms, the same applies to the case of a large number of rooms or the control of each zone of a large room.

〔Effect of the invention〕

As described above, the indoor air conditioning system of the present invention allows air to be blown from one air conditioner to multiple locations via ducts by simply adding simple equipment, and thereby improving the thermal characteristics of each room. It is possible to correct temperature variations caused by
As a result, it is possible to perform appropriate control to uniformly maintain the required temperature.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an embodiment of the indoor air conditioning system of the present invention, Fig. 2 is a circuit diagram showing details of a differential temperature controller, and Fig. 3 is a diagram showing temperature deviation and damper in the first stage of temperature control. Figure 4 is a diagram showing the relationship between the opening degree, Figure 4 is a diagram showing the relationship between temperature and control status in the second stage control, Figure 5 is a flowchart of calculations in the heat source control device, and Figure 6 is a diagram showing the relationship between the temperature and the control state in the second stage control. Figure 7 shows changes during heating, Figure 8 shows changes during heating.
The figure is a predicted diagram showing the temperature transition according to the present invention during heating.

Claims (1)

[Claims] When blowing air from one air conditioner to multiple locations via ducts, the first step is to change the air distribution amount according to the temperature difference between each location, and the second step is to change the air distribution amount according to the required amount of heat supplied to each room. An indoor air conditioning system characterized by controlling the operation of an air conditioner and repeating such two-step control.