JPS58110937A - Operation control method for ventilating apparatus - Google Patents

Abstract

PURPOSE:To lower the running cost of a ventilating apparatus, by employing such an arrangement that ventilation is carried out according to the density of contaminant contained in the air in a room to be ventilated. CONSTITUTION:A dust-density signal transmitter 11 comprises, for instance, a light projector and a light receiver disposed in a room to be ventilated. The transmitter 11 detects the density of dust from the rate of light received by the light receiver and produces a voltage signal of the dust density. The output signal of the transmitter 11 is afforded to a V/I converter 21, in which the voltage signal is converted into a current signal. The output signal of the converter 21 is in turn afforded to a dust density/air- flow rate calculating means 22, which calculates the air-flow rate from the current signal given from the converter 21 by using the density of dust in the room to be ventilated as a setting density. The air-flow rate thus obtained is furnished to a means 31 for determining the air feed rate of a fan, which converts the output value of the means 22 into a value corresponding to the air discharge rate and gives an output signal to a means 32 for determining the blade angle of the fan. The means 32 in turn determines the blade angle of the fan. The means 32 in turn determines the blade angle of the fan from the output signal of the means 31, whereby the room can be ventilated at a required air-flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the operation of a ventilation system, and more particularly, to a method for controlling the operation of a ventilation system suitable for controlling the concentration of pollutants contained in the air in a room where ventilation is performed by the ventilation system to a set concentration. Regarding an operation control method.

Conventionally, in factories, offices, etc., when the air is contaminated with pollutants such as dust, ventilation devices have been used as devices for purifying the air. Conventionally, there are the following methods for operating this persimmon ventilation system.

(1) An operating method in which the amount of exhaust gas from the ventilation system is always constant.

(2) Indoor exhaust emissions by time and season
Always operate the displacement according to the L/H set value.

(3) Use of equipment equipped with ventilation equipment) An operating method in which the amount of indoor exhaust air is varied by force.

(4) An operation method based on number control in which multiple ventilation devices are controlled based on a predetermined program.

When viewed from the perspective of exhausting pollutants in a room that is ventilated by a ventilation system, all of these operating methods tend to cause excessive exhaust when there are few pollutants; The operating method was not able to follow the behavior of pollutant generation.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a ventilation system that performs ventilation according to the concentration of pollutants contained in the indoor air to be ventilated by the ventilation system. The purpose of this invention is to provide an operation control method.

In order to achieve the above object, the present invention calculates the concentration of pollutants contained in the air in a room where ventilation is performed by a ventilation system, and calculates the ventilation amount from this concentration to make the pollutant concentration in the room a set concentration. The ventilation operation of the ventilator is controlled based on the obtained ventilation amount.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

Figure @1 shows an embodiment of an apparatus to which the method of the present invention is applied, and a block diagram showing the basic structure thereof. In the figure, a dust concentration signal transmitter 1 is provided that detects the dust concentration contained in the air in a room where ventilation is performed by a ventilation device and sends out a dust concentration detection signal, and the output signal is supplied to a calculation acclimatizer 2. be done. The arithmetic processor 2 calculates the ventilation amount with the indoor dust concentration as the set concentration based on the dust concentration signal, and supplies the calculated value to the ventilation amount setting device 3.

The ventilation rate setting device 3 controls the blade angle of the blower when the ventilation system controls the indoor ventilation rate based on the airflow rate of the blower.

Next, FIG. 2 shows an example of a specific configuration of the apparatus shown in FIG. 1. In Fig. 2, the C1 dust concentration signal transmitter 11 is configured, for example, by installing a light emitter and a light receiver in a room that is ventilated by a ventilation system, and detecting the dust concentration by measuring the proportion of light received by the light receiver. It outputs a voltage value signal. .

The output of the dust concentration signal transmitter 11 is supplied to the V/I converter 21, where it is converted into a current signal corresponding to the voltage value. V/
The output signal of the I converter 21 is supplied as a dust concentration signal to the computing unit 22, and the V/I
The current signal from the converter 21 is used to calculate the air volume that makes the indoor dust concentration the set concentration. This calculated value is supplied to the blower air volume setting device 31. The blower air volume setting device 31 outputs the calculated value from the dust concentration-Kt calculator 22 to the exhaust Ki! −, and send the setting signal to the blower blade angle setting device 32.
supply to. The blower blade angle setting device 32 sets the blade angle of the blower based on the air volume setting signal. As a result, the blower has a predetermined amount of air inside the room depending on the predetermined blade angle! JF Qi is fulfilled. The blower is an axial flow type with flexible blades.

In the above embodiment, the exhaust number using a blower was described, but in this embodiment, a ventilation system is used to supply and exhaust air, and a method in which only outside air is brought into the room and the room is overpressurized is used to fill gaps etc. It can also be applied to systems that exhaust excess air from the air.

As explained above, according to the present invention, ventilation can be performed according to the concentration of pollutants, so it is not necessary to always keep the ventilation t constant in the room where ventilation is performed by the ventilation device, and the ventilation This has the excellent effect of reducing costs.

[Brief explanation of drawings]

s1 is a basic configuration diagram showing an actual example of a ventilation system to which the method of the present invention is applied, and FIG. 2 is a configuration diagram showing a specific configuration of the device shown in FIG. 1. 1.11...Dust concentration signal transmitter 2...Arithmetic processor 3...Ventilation rate setter 21...V/I converter 22...Dust concentration-air volume calculator 31...Blower Air volume setting device 32... Air blowing 1% [Angle setting device agent Tatsuyuki Unuma (and 2 others)

Claims (1)

[Claims] (1) Determine the concentration of pollutants contained in the air in the room where ventilation is performed by the ventilation device, determine the ventilation amount that makes the contaminant concentration in the room the set concentration from this concentration, and calculate the ventilation amount based on this ventilation amount. A method for controlling the operation of a ventilation system, comprising controlling the ventilation operation of the ventilation system.