JPS59164837A - Method for controlling air conditioning system - Google Patents

Abstract

PURPOSE:To reduce power consumption and to improve the control quality, by controlling the amount of cooling water from a heat source and the number of refrigerating machines that are to be operated, based on an indoor temperature signal, in an air conditioning system that consists of a fan coil load and an absorption refrigerating machine combination heat source. CONSTITUTION:According to increase or decrease of load, signals of room thermostats T1-Tn in respective rooms are inputted into valves to control the cold water flowing through fan coil units L1-Ln. An input signal is inputted via a heat source number controlling apparatus 2 and a frequency controlling apparatus 3 into a heat source machine and a pump. According to the state of load, a corresponding number of the absorption refrigerating machines C1-Cn of a heat source machine are operated and the speed of the pump is controlled. By controlling the amount of cooling water and the number of the refrigerating machines that are to be operated, power consumption can be reduced and the control quality can be improved.

Description

[Detailed description of the invention] In a nitrous air conditioning system consisting of a heat source plant consisting of a heat source plant and a load consisting of a plurality of fan coil units, full use of the room thermostat signal used for closed loop system TIrlj only in the load is provided. And the heat source Frantowo is 1
This invention relates to a system control method in which @l is used.

A conventional air conditioning system is comprised of a heat source plant and a load, as shown in FIGS. 1 and 2. A plurality of absorption/Iy type refrigerators C1 are installed in the heat source plant.

Contains C2...Cn, and can be connected in parallel to each of those cold water output pipes. That joint jG exit l
'rjtVc is a black degree of 1゛M, all the sensors that detect it are operated (=j), and its output is manually input to a 6m degree regulator/, and each absorption refrigerating type and machine C,,C
, , . . . , the number of operating units of C is controlled.

The zero heat plant in Figure 7 is equipped with a 11u pump "ff: l"
Furthermore, it is a constant flow type that keeps the wave train of cold water flowing through the cold water pipe constant. The load is multiple Funko 1 Uni 7
tL,',L2. ... I-+ 1□, and the Tani Funko and Ill units are equipped with three-way valves to supply cold water to the room thermostats I', T2.・
・、Bypass by T17 If! I ++'I'll make a V.

The heat source plant in Figure 2 includes each absorption chiller c1. c2゜・
・Bond 7'P for the two of Cn in the missing law self-tube,,
P.

...PJ]; I'm confused. The valley pump is a temperature regulator/
operates in conjunction with the operation of the absorption chiller controlled by 1tjlJf to beat the flow of cold water r# flowing into the piping.

The shunting heat source plant has a variable flow rate system that changes the distribution of cold water temperature VC and the flow rate of cold water. The load is a plurality of fan coil units L, , L2 . ... Lr1 consists of 11), and each fan coil unit is equipped with a room thermo stand T, , T'2. ... In the conventional system, the squares on the market side 1 are connected and connected to each other by To, and cold water is poured into the room thermo stand in each room.
It is used only in the Cape, and is controlled by a million heat source plant: It is controlled solely by the temperature change of cold water caused by load fluctuations.

Therefore, in the constant flow system shown in FIG. 1, the pump is continuously operated at 100% capacity regardless of the increase or decrease in the load, so there is a loss in power consumption when the load is 1 child.

In the variable flow system shown in Figure 2, the heat source plant is controlled only by the temperature of the chilled water, so when the load is light, the flow rate decreases even if the chilled water temperature is within the set temperature range. Because of this, the heat exchange rate of the load is poor (the temperature of the two-wavelength circuit may be stable in a good condition).

The present invention has been made in view of the above-mentioned circumstances, and is a new system that takes into consideration the above-mentioned drawbacks. The purpose is to provide a wholesale method.

A preferred embodiment of the present invention illustrated in FIGS. 3 and 9 will now be described in detail. In Figures 3 and 9,'
*/ Elements equivalent to those in FIG. 2 and FIG. 2 are designated by the same reference numerals.

In FIG. 3, the heat source plant is equipped with a heat source number control device and a frequency control device 3. The heat source number control device 2 receives a signal from a secondary pipe 4, a tube temperature sensor TM, and a load room thermostat T1. T2.・
・In response to the signal from PaPn, the absorption refrigerators C,,C2,
...C11 is connected to control the number of units. 1 frequency control device 3 is a load room thermostat T1. ′”
2. . . . It is connected to receive the signal Tn and to control the frequency of the pump P.

To explain the action, when the load increases or decreases, the room thermostat in each room °I"1.'l'2....T
As before, the fan coil unit L
4. .

L2. ...L,]K flowing cold water is used. Furthermore, the room thermostat signal is transmitted to the heat source number control device 2.
By communicating with the heat source machine needles and the pump through the frequency control device 3, the number of heat sources that match the load condition is operated, and the pump full speed is controlled to a flow rate that matches the load condition.

Now, in 1st history, n = J, the theory is: decline. In other words, the load fan coil unit k ”1r L2
+'5 +Each room thermostat "e""1+
T2 + T5 + absorption chiller k C1+ 02 +05 which is the heat source machine of the heat source plant.

And the control range of chilled water temperature TM f3''C~IO'C
The upper limit k TM ; DI lower limit ?
';i''M5.Cold water temperature T on heat source stand a control device
When M is within that temperature range, the room thermostat T1°T2. Keep the signal of T, out of range of Hr! ,
``I'M's signal was misinterpreted and the absorption chiller C,,C
2, C, shall be used for control.

When the dog state is stable under full load operation and becomes light load, that is, fan coil unit L,, L2゜j, 3.
Absorption refrigerator CI I L 21 b s is operated,
If the cold water temperature is stable within the temperature range of 1.7 and the fan coil unit L, for example, is in operation, an OF'F signal is output from the room thermostats 142 and L3. As a result, the heat source number I control device 2 controls absorption refrigerators C2 and C5.
Full stop. Furthermore, at this time, the rotation speed of the pump I is reduced to a preset rotation speed using the frequency a control W11 device 3. In this case, pump P ('t room thermostat T, 1M1) will be controlled, and if room temperature is -F and room thermostat J1' is still outputting a cooling request signal, this The rotational speed of the pump P is increased by the signal from the room thermostat 'r, and the flow rate of cold water is increased.
The room thermostat adjusts the opening of the three-way valve of the fan coil unit L according to the room temperature, and also adjusts the rotational speed of the pump P.

The frequency unit 1a1 device 3 uses a room thermostat to adjust the rotation speed of the pump P, but the pump rotation speed is also set to a certain extent depending on the number of fan coil units being operated. As in the above example, if / of the three fan coil units L is in operation, for example, the rated fan coil unit L is 30, the 2 units are connected, -1-L2
In the case of 5θ, L, +I, 2 knees 1-L
In the case of 3, set it as /θθY, for example.

For example, in the case of continuous rotation of only Ll in the above example, the pump rotation speed is initially set at 30%, and then gradually increases by the signal from the room thermostat 'P until t.
Assume that it is stable at oatz. At this time, if fan coil unit I is turned on, d'1'', +
The pump rotation speed is set to 50% by the signal T2.

Here, the amount of cold water treatment increases, the amount of heat exchange with the load increases, and the temperature of the cold water rises, reaching the upper limit temperature of the specified range of 'I and S degrees.'
1o, the heat source number control device 2 includes fan coil units T, ,'r2. The number of operating absorption chillers C, C2, and C6 was determined according to the signal tF- from 'T, , but now the signal of chilled water temperature MTy is given priority, and the rM signal is used to stop the operation. 7 absorption chillers were put into operation. As a result, when the chilled water temperature ゛F14 falls and enters that temperature range, the frequency 111] control device 3 is again set to the fan coil unit L.
, 10L2 to control the rotational speed of the pump.

Similarly, when the cold water temperature TM falls below the lower limit temperature TM5, the heat source number control device 2il-j: fan coil units L, L2. The number of absorption refrigerating machines corresponding to the number of operating units of L and L was being controlled, but the signal of the chilled water temperature '1'2 was given and the absorption refrigerating machines/units were stopped.

In another example of FIG. Similar to the embodiment shown in FIG. 3, the heat n-unit number control device 2 receives a signal of the chilled water temperature TM, each fan coil unit of the load,
L,,L2. # # @ Room thermometer installed in Ln, T2. ... are connected to control the number of absorption chillers 01+021...cn in response to the signal T□. The number of pumps is 11rlJ, the sieve device is equipped with room thermostats T, T2. . . . In response to the signal of Tn, the pumps P, , P2 . . . . P, ]'s driver's cab is opened.

The operation in the case of n-3, similar to the above-mentioned practical example, will be explained. In this example, the range of blackness FM is from 7°C to 7°C.
10°C and 1~. 1゛yu only t ”Mlo +
- Set 'l'' M5 at the limit. And cold water fR Tomo TM
If that's the temperature, that's the room thermostat,
- If it is outside of 11 and 9, the TM signal is assumed to be sent 4 times earlier.

Now, fan coil units L, , L2. L...
, absorption refrigerator C+ + 02103 and pump P, , P2. Suppose that P3 is in operation and the chilled water temperature T is stable within its temperature range in the river. Here, if only 7 Anko Ino I-He unit L is operated, an OFF signal is output from the room thermostats T2 and T3. This OFF signal turns off absorption refrigerators C2, C and pumps P2. P3 is suspended.

In the fan coil unit L, when the room temperature thermometer mostat T1 is outputting a cooling request signal, the signal from T1 instructs the pump stand control device II to fully operate the pump. ′
f, that is, pump P2 is started. Therefore, the flow of cold water is greatly increased by the two pumps P, , P2. Of course, the cold water temperature is pump P,,P2
If the level does not drop even after operation: If the pump P5
I'll run it at full capacity and increase the flow of cold water.

However, the operating condition must be satisfied that the number of pumps in operation is equal to or greater than the number of absorption chillers in operation. For example, the load is only the fan coil unit IJ1, and the pump is P.

P2. Since the absorption chiller is operating only at C7, the chilled water temperature ゛1' has exceeded its upper limit TM, o, so the signal q'ヮ is prioritized and the absorption chiller C2,
When C, is started, absorption refrigeration] C2
Pump 1] 2 is in operation mode, so absorption chiller C2
There will be no inconvenience if the pump starts operating, but pump P of the 1st and 1st Medical Refrigeration Iso C6, which has been suspended.

must be started simultaneously with the start of operation of this absorption chiller C3.

According to the present invention, the amount of cold water supplied from the heat source plant to the load is controlled by the signal from the room thermostat of the load 1H1 in the conventional 1131] nail method of the constant flow hanging type and the variable flow attached type. In IE11, by further dividing the variable flow rate method by month, the effect of solving the problem of power consumption in the constant current meter method and open side j quality in the new variable current method will be diminished. ,/[O1. In the embodiment shown in FIG. 3, frequency control is used for the 11 ill 6 stroke of the cold water pump, but the present invention is not limited to this; etc. may also be used.

[Brief explanation of drawings]

Figures 47 and 2 are illustrations of American air conditioning systems.
Figures illustrating the IJ cape method, Figures 3 and 9 are diagrams illustrating the till method according to the present invention.
・Temperature controller, C... Heat source number control device, 3. Frequency i1t control device, Ri... Pump number control device, C...
Absorption refrigeration, tQ, P pump, L fan coil, unit, T working room thermostat.

Claims (1)

[Claims] / A heat source plant consisting of a plurality of absorption chillers whose number of units in operation is controlled by a common cold water outlet temperature, and a room thermostat connected to this heat source plant to control the amount of heat exchange. In a method for controlling a nitrous air conditioning system consisting of a load, a signal from a room thermostat is used to supply cold water to the load from a heat source plant, and the operation of the absorption chiller is also carried out. The main feature of this method is to control the number of units. λ Ail Note Main water consumption lill wholesale is heat source plant j
Speed field 1j 111 common cold water pump located in lf l]
Claims reciting all features of the invention...1]
1. Method 1. , heptagonal iJ cold water: large control f valley absorption type refrigeration; the method of.