JPH06323607A - High-humidity air-conditioning system - Google Patents

Abstract

PURPOSE:To provide an air-conditioning system of high efficiency which enables intake of outdoor air up to the full of the humidifying capacity of each air conditioner, by comparing an inverted signal of a signal controlling the amount of humidifacation with a control signal of the amount of intake of the outdoor air and by controlling the amount of intake of the outdoor air by the signal of a smaller value. CONSTITUTION:A control device 14 executes a control on the basis of measuring signals from an outdoor air temperature sensor 11 and temperature sensors 12 and 13 provided in an air-feeding duct 3 of each air-conditioner 2, makes a humidifier control signal M corresponding to the air conditioner of the lowest temperature on the basis of the temperature of each air-conditioner 2 and makes an outdoor air intake control signal D corresponding to the air conditioner of which the amount of intake of the outdoor air is the largest, on the basis of a difference between an outside air temperature and the temperature of circulating air of each air conditioner. On the other hand, a signal processing means 15 provided between the control device 14 and each air conditioner 2 receives the outdoor air intake control signal D and the humidifier control signal M as inputs and outputs a signal for controlling the intake of the outdoor air actually, and it is provided for each air-conditioner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for performing air conditioning while taking in outside air, and more particularly to an air conditioning system which needs to maintain high humidity.

[0002]

2. Description of the Related Art Although there are several types of air conditioning systems, it is common to circulate air from a controlled room with an air washer or the like and use the heat of vaporization (Japanese Patent Publication No. 57-40412), many of them take in outside air as a cold heat source. FIG. 3 is an explanatory diagram showing an example of such an outside air intake type air conditioning system. In the figure, 1 is an air conditioning control target room, 2 is an air conditioner,
Both are connected by an air supply duct 3 and an air circulation duct 4, and a fan 5 forms an air circulation path as shown by an arrow. Further, an air washer 6, a temperature controller 7 including a cooler / heater, and a humidifier 8 such as steam sprayer are provided in front of the air supply duct 3, respectively. By opening the mouth 9 and controlling the opening degree of the damper 10 provided in the outside air intake 9, the intake amount of outside air can be adjusted.

In such an air conditioning system, the control device 14 such as a computer controls the outside air intake control signal based on the measurement signals from the outside air temperature sensor 11 and the temperature sensor 12 and the humidity sensor 13 provided in the air supply duct 3. D and a humidifier control signal M are generated, and the outside air intake control means 15 controls the opening degree of the damper by the outside air intake control signal D.

Now, in the synthetic fiber manufacturing process, it is required that the twisting and twisting chamber and the like maintain a higher humidity than in ordinary air-conditioning conditions. Therefore, there is no problem if the humidifier 8 has a sufficient capacity, but it is wasteful to provide the humidifier 8 having a large capacity to meet such a humidity condition throughout the year. Therefore, the humidifying condition of the air conditioner and the outside air intake condition in the twisting process, that is, the opening control signal D of the damper and the control signal M of the humidifier are necessary for humidifying the humidity of the outside air taken in to a set value. It is necessary to keep the capacity of the humidifier 8 from exceeding its maximum capacity throughout the year.
The upper limit value is set in advance such as 0% or less.

[0005]

However, in the method of setting the upper limit value of the outside air intake amount in advance, when a plurality of air conditioners are operated in parallel, the air conditioner varies among the air conditioners, and Even if there is an air conditioner that can maintain the humidity even if a large amount of outside air is taken in, the amount of outside air taken in is set uniformly, and this cannot be dealt with, leading to a reduction in air conditioning efficiency.

The present invention solves such a problem, and an object of the present invention is to provide a system capable of taking in outside air to the full humidification capacity of each air conditioner, thereby achieving highly efficient air conditioning. To provide a system.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a part of outside air is taken in, mixed with circulating air, humidified, and the humidity of the mixed air is measured to obtain a predetermined amount of humidification and outside air. In an air-conditioning system that controls the intake amount, an inverting means that inverts and outputs a signal that controls the humidification amount, and the output of the inverting means is compared with a signal that controls the intake amount of outside air, and the signal with the lower value is output. The high-humidity air conditioning system is characterized in that it comprises a selection means for controlling the outside air intake amount by the output of the selection means.

[0008]

In the air conditioning system of the present invention for taking in part of the outside air, the humidification amount and the outside air intake amount are determined by measuring the outside air temperature and the humidity of the mixture of the outside air and the circulating air. . In the present invention, the inversion signal of the signal controlling the humidification amount, that is, the signal inversely proportional to the humidification amount and the control signal of the outside air intake amount are compared, and the signal having the lower value is used to control the outside air intake amount. Therefore, even if the upper limit is not set for the outside air intake amount in advance, the outside air is not taken in exceeding the capacity of the humidifier.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
FIG. 1 is an explanatory view showing the entire air conditioning system, including an air conditioning control target room 1, an air conditioner 2, an air supply duct 3, an air circulation duct 4,
The air conditioning system itself including the control device 14 and the like is the same as that described above with reference to FIG.

Further, in the figure, three such air-conditioning systems are connected in parallel, and the humidifying condition and the outside air intake condition are controlled by one controller. Controller 14
Is a temperature sensor 12 provided in the outside air temperature sensor 11 and the air supply duct 3 of each air conditioner 2 ...
Control is performed by the measurement signal from the humidity sensor 13 ..., The humidifier control signal M is generated corresponding to the lowest humidity based on the humidity of each air conditioner 2, and the outside air temperature and the temperature of each circulating air are generated. An outside air intake control signal D is generated corresponding to the one having the largest amount of outside air intake based on the difference between and.

Therefore, if only such control is performed, the amount of intake of outside air increases, and the humidifier 8 ...
Since there is a possibility of exceeding the capacity of, the upper limit value is set for the outside air intake amount as described above, but the control unit 14 of the present air conditioning system does not set such an upper limit value.

On the other hand, in this air conditioning system, the controller 14
The signal processing means 15 ... Is provided between the air conditioner 2 and each air conditioner 2. The signal processing means 15 ... Inputs the outside air intake control signal D and the humidifier control signal M and outputs a signal for actually controlling the outside air intake control means 15.
It is provided for each air conditioner.

FIG. 2 is a block diagram showing the details of the signal processing means 15 ... The humidifier control signal M input to the signal processing means 15 is inverted by the inverting means 151 and becomes an input signal of the selecting means 152. Inverting means 151
Is a signal for converting the humidifier control signal M into a signal inversely proportional thereto. For example, if the humidifier control signal M is a signal for performing control to increase the humidification amount as the voltage value increases, The voltage value that is decreased according to the rising width is output. Specifically, a relay or an inverting circuit can be used in the system controlled by the voltage value.

The voltage value for actually performing the inverting operation, the absolute value of the output voltage, etc. may be determined by the output of the bias setting means 153 input to the inverting means 151, and the values are set in advance. The bias setting means 153 can also use a ratio bias circuit or the like in a system in which control is performed by the voltage value. The selecting means 152 compares the inverted output R of the inverting means 151 and the output of the outside air intake control signal D and uses the signal with the lower value as its output. As described above, the system is controlled by the voltage value. Then, it suffices to simply compare the voltages and operate the relay or the like based on the result.

FIG. 4 is a graph for explaining the processing operation of the signal processing means 15. The horizontal axis represents the outside air intake control signal and the signal level of the inverted output R, and the vertical axis represents the outside air intake amount (damper). 10). The dotted line is the inverted output R of the humidifier control signal M inverted and output by the inversion means 151. As shown by the solid line, when the value of the outside air intake control signal D output from the control device 14 increases, the outside air intake amount also increases in proportion to this, but the outside air intake control signal D becomes the inverted output R. When the signal level P at the intersecting point is exceeded, the actual outside air intake amount falls within the shaded area in accordance with the humidifier control signal M.

That is, since the signal level of the outside air intake control signal D is within the range of the capacity of the humidifier 8 from 0% to P, the outside air intake is taken in regardless of the signal level of the humidifier control signal M. The damper opening degree may be controlled according to the signal level of the control signal D. On the other hand, the outside air intake control signal D is 100%
When the damper 10 is controlled to open up to the upper limit, the signal level of the humidifier control signal M is 0%, and if the humidification is not necessary, the damper 10 is kept at 100%.
However, if the signal level of the humidifier control signal M is 100% and the humidifier has been fully humidified, there is a risk that humidification will be insufficient if the outside air is taken in. Since 10 cannot be opened, the outside air intake amount (damper opening degree) becomes 0% according to the reversal output R. Further, while the signal level of the outside air intake control signal D is from P to 100%, the outside air intake amount is set within the shaded area of FIG. 4 by the capacity of the humidifier (humidifier control signal M) according to the above control. To be done.

[0017]

According to the present invention, the outside air can be taken in to the full humidification capacity of the air conditioner without major modification of the existing outside air intake type air conditioning system. Even in the system, the most efficient air conditioning is possible.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the entire air conditioning system.

FIG. 2 is a block configuration diagram showing details of a signal processing unit 15.

FIG. 3 is an explanatory view showing a conventional outside air intake type air conditioning system.

FIG. 4 is a graph for explaining the processing operation of the signal processing means 15.

Claims (1)

[Claims] 1. A part of outside air is taken in and mixed with circulating air,
In the air conditioning system for controlling the humidification amount and the outside air intake amount by measuring the humidity of the air-fuel mixture to a predetermined value by further humidifying it, an inverting means for inverting and outputting the signal for controlling the humidification amount, High humidity characterized by comprising a selection means for comparing the output of the reversing means with a signal for controlling the outside air intake amount and outputting a signal having a lower value, and controlling the outside air intake amount by the output of the selection means. Air conditioning system.