JPS6011044A - Control system for air-conditioning - Google Patents

Abstract

PURPOSE:To make general air-conditioning condition proper by a method wherein individual weight coefficients are determined in accordance with the conditions of respective rooms and the average of loads of detected values, showing the air-conditioning conditions of respective rooms, are obtained by utilizing the weight coefficients to control an air-conditioning machine by the average value. CONSTITUTION:Respective detected values V1-Vn of respective temperature sensors TR1-TRn are inputted into third operator OP3 and the average of loads is obtained by the operation of a formula 3 while this average becomes the average value (d)u3 of temperatures of respective rooms R1-Rn. Here the weight coefficients, determined in accordance with the degree of importance, to be remarked in the control of air-conditionings of respective rooms R1-Rn, or the temperature detecting conditions of temperature sensors TR1-TRn, are shown by notations W1-Wn in the formula. The output (c) of the operator OP2 and the output (d) of the operator OP3 are inputted into the fourth operator OP4 to add them. The output (e) of the adder OP4 is inputted into the fifth operator OP5 together with a set value SP, determined in accordance with necessary air- conditioning conditions, to operate PID (proportion, integral and differential) based on both values and the result of operation is outputted as a control signal CS.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an air conditioning control system that controls an air conditioner according to air conditioning conditions such as temperature and humidity in each room.

[Prior art]

Figure 1 is a block diagram of a conventional example, in which the heating coil H/C
, cooling coil C/C, humidifying spray SP, and
An air conditioner AC with 7 amF is installed, and an electric valve MV1 is installed.
- Each water supply such as hot water for heating, cold water for cooling, and water for humidification is supplied via MVs, and outside air OA6! After passing through these, it is sent out as supply air by fan F, and after passing through each room R1 to Rn, it becomes return air, and some of it is supplied to the air conditioner AC again, while the rest is discharged as exhaust BX. In addition, each room R1 to RnK has a temperature sensor TRu to
'l'Rn is provided, and the room temperature indicating the air conditioning state is detected by this fLK, and the control unit CT performs control calculations according to these detected forces, and each electric valve MVx, MV
It controls the opening degree of fan I, maintains the room temperature at a predetermined set value, and controls the operating status of fan F.

However, in the past, each temperature sensor TR1 to TRn
Since each detected force is averaged in the control unit CT and the valve opening is controlled only based on this, the air-conditioning condition of the room, which should be particularly important in air-conditioning control, is neglected, and it is also difficult to change the indoor layout, etc. Therefore, if the temperature sensor is surrounded by fixtures or equipment and the detection situation becomes inaccurate, the detection power of the temperature sensor under such conditions should be underestimated.
This is also treated in the same way as other detection power, and has the drawback that the overall air conditioning condition is inappropriate.

[Summary of the invention]

The purpose of the present invention is to fundamentally solve the drawbacks of the conventional technology, by determining weighting coefficients for each room depending on the situation, and using these to determine the detected value indicating the air conditioning state of each room. The present invention provides an extremely effective air conditioning control system in which the weight average is determined and the air conditioner is controlled using this average value.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to FIG. 2 and subsequent figures showing embodiments.

Figure 2 is an instrumentation diagram similar to Figure 1, but the air conditioner AC
A temperature sensor TS is provided in the duct to detect the temperature of the supply air sent out from the duct, and its detection power is applied to the control unit CT.

FIG. 3 is a block diagram showing an arithmetic circuit in the control unit CT;
FIG. 4 is a diagram showing the waveforms of each part in FIGS. 2 and 3. If the p1 valve control signal (,) changes in a stepwise manner, the detected value (b) of the temperature sensor TS will change accordingly. This changes with a delay, and this is given to the first arithmetic unit OPI, where a first-order delay is performed by calculating the following equation, and output (b) u.

The value shown in is delayed by 9G.

ul==V(1e"t)...11) However, the roaring 0. Also, the detected value V and the delayed value u1 are the second arithmetic unit OP
2, and the following equation is calculated here, resulting in the difference between the two (c), 2, which indicates the amount of differentiation in the change in the detected value V.

□: v-u10.01. ．． 1. (2) On the other hand, each detected value of each temperature sensor T R1 - T Rn ■1
~Vn is given to the third computing unit OF, and calculated by the following equation to obtain a weighted average, which becomes the average value (d) of the averaged temperature of each room R1 to Rn.

v! -At+v2・Bian+・・・+vn@Wnus” ・
...(3) W1+W2+...+Wn However, W1 to Wn are the degrees of importance that should be noted in the air conditioning control of each room R1 to Rn, or the temperature sensors T R1 to TRn
This is a weighting coefficient that is determined according to the temperature detection situation.

Next, how to output the arithmetic unit OP2 (c) and the arithmetic unit OP4
The output (d) of
,, becomes.

u4=113+αφu2″−e (4) However, α is a coefficient that determines the situation in which the difference value u2 is involved in the addition value u4.

The output (e) of the adder OP4 is given to the fifth arithmetic unit OPs together with a set value SP determined according to the required air conditioning state, and based on both (PID (proportional, integral, differential ) is calculated, and the result is the control signal C.
The electric valve B (Vl, M
It is given to V, etc., and controls the opening degree of these.

Therefore, as is clear from Fig. 4 (a) and (d), if only the detected values v1 to vn of the temperature sensor TRI-TRn are used, the output (d) will be extremely delayed with respect to changes in the control signal (,). However, by adding the output (c) to the output (d), the change in the output (@) becomes the control signal (,)
t1''i, the response speed of the valve opening to the air conditioning condition is improved, and the valve opening is set to the optimum value within a short time.

- Since the waveform of the output (e) is determined depending on the involvement status of the output (c), the response characteristics of the valve opening control can be determined by selecting the coefficient α.

Furthermore, since the adder OP s calculates the formula (3), the weighting coefficient W! By setting ~Wn according to the conditions of each room R1 to Rn, it becomes possible to perform control based on rooms that are particularly important for air conditioning control, or to ignore rooms that are treated as exceptions for air conditioning control, and to control the general Each room R1
~Rn air conditioning conditions can be maintained optimally.

However, a humidity sensor may be used in place of the temperature sensors TR, ~TRn, and TS to control the electric valve MVs for spray SP, and the type of sensor may be selected depending on the physical quantity required for air conditioning such as temperature or humidity. All you have to do is determine.

In addition, the configuration shown in FIG. 3 may realize the equivalent function by using a processor, a processor, etc., and the calculation of equation (1) by the arithmetic unit 0PrVC is performed not only with the first-order delay but also with the arithmetic unit OP2.
As long as the difference value (c) can be determined by calculating the equation (2) according to the equation (2), it can be arbitrarily selected υ, and various modifications can be made at will.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the empty silk system takes into consideration the usage status or physical quantity detection status of each room! Since # is carried out, the overall air release state is optimized, and a remarkable effect can be obtained in terms of air conditioning control.

[Brief explanation of drawings]

FIG. 1 is an instrumentation diagram of a conventional example, FIG. 2 and subsequent figures show embodiments of the present invention, FIG. 4 is a diagram showing waveforms of various parts in FIG. 3. FIG. R1-Rn-War...Room, AC...Air conditioner, MV, 1
~MVs' ” ” ” Electric valve, li' a *
* *7 Anne, CT * a * * Control section, TR1 ~
TRn1TS...Temperature sensor, OPl~OPs
... Arithmetic unit, Vl = Vn, V... Detected value,
SP... Setting value, Wt ~ Wn... Weighting coefficient,
(d)...Average value. Patent applicant: Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (and one other person) Figure 1 Figure 2

Claims (1)

[Claims] In an air conditioning control method in which detected physical quantities indicating the air conditioning status of each room are averaged and the air conditioner is controlled according to the average value, a weighting coefficient is determined for each room, and a weighting coefficient is determined for each room. Multiply each of the detected values for each room individually and then add the sum.
An air conditioning control method characterized in that the sum value is divided by the sum value of the room occupancy coefficients, and the divided value is taken as the average value.