SU1232902A1 - Humidifier - Google Patents

Description

The invention relates to agriculture, in particular to indoor microclimate devices;

The purpose of the invention is to increase the efficiency of temperature regulation of the air humidity parameters.

Fig. 1 shows a device for humidifying air; Fig 2 is a control unit.

The device contains an inlet duct 1 with a fan 2, a water tank 3 with a heater 4. And a bubble oven 5, an outlet duct 6 with a heater 7, sensors 8 and 9 of temperature and humidity air% installed in the inlet duct 1, sensor 10 humidified air, installed in the outlet duct 6 level gauge 11, water temperature sensor 1, signal converters 13-16 from sensors 8, 9, 10 and 12, control unit 17, which contains the driver 18, comparison elements 19 and 20, recording device 21, measuring and regulating devices wa 22 and 23. The sensors 8, 12 and 10 using the thermocouple. Tank 3 is equipped with pipelines 24 and 25.

The device works as follows,.

Air, for example, from the greenhouse, supplied by the fan 2 through the duct enters the bubbler 5, from which it flows into the water tank 3. At some distance from the bubbler 5, the air stream disintegrates into air bubbles. When air bubbles move in water, the latter is evaporated in them, as a result of which the moisture content of the air rises;

The temperature and humidity of the air coming from the greenhouse the temperature of the water in the tank 3 and the temperature of the air directly entering the greenhouse are measured respectively by sensors 8, 9 and 12, 10, functionally connected via converters 13, 14, 16 and 15 to the control unit 17. Control pulses produced by the latter are sent to measuring and regulating devices 22 and 23, which control the operating mode of the preheater 5 and heater 7. Since the air blown through the water tank 3 receives

Because the water in the tank 3, then for a given air humidity, determined by the temperature of the water in the tank 3, it may be that the temperature of the air entering the greenhouse is lower than necessary. In this case, the control unit 17 gives the command to turn on the heater 7, which heats the air to required temperature

The change in the humidity of the air blown through the water tank is determined from the expression

A (f

ig-p

Q oil

 V +

s TH-N

ten)

where is itp

S

five

0

five

0

five

change in air humidity,%;

barometric pressure of humid air, hPa; pressure of saturated water vapor, hPa;

air flow through one barbatter hole, height table liquid ba, m; the difference between the temperature of the water in the tank and the temperature of the air in the bubble, C. For example, at a temperature of liquid -.

P - 5 Q - n AT 0 t t

oo with

 -JW V. and air 1 sate of H 1 liquid column

20 С,

you-, air flow through one hole. the bubbler Q 15, the pressure of the saturated vapor P 38 hPa, the atmospheric pressure P 1000 hPa, the increment of the humidity of the air blown through the water tank is 2%.

Since the pressure of saturated air vapor evaporating in the tub, depends on the temperature of the liquid, the required increment of air humidity can be obtained by adjusting the difference between the water temperature and the air temperature blown through the water tank 3. Additionally, the humidity of the air can be adjusted by changing the water level above the bubbler 5 by adding or draining water from tank 3 through pipelines 24 and 25, controlling the water level in the tank at the level gauge 1 1.

Thus, the invention improves the efficiency of regulating the temperature and humidity parameters of air.

From source-I ka Saffbi

Jj

Vazauh from the greenhouse

1

2

VNIISH Order 2754/38 Circulation 649 Subscription Proizv.-poly. pr-tie, g, Uzhgorod, st. Project, 4

Claims (1)

A device for humidification of air, comprising an inlet duct with a fan, a water tank with a heater and a bubbler, a humidified air temperature sensor, an outlet duct with a heater, characterized in that, in order to improve the regulation of temperature and humidity of the air, it is equipped with a second humidified temperature sensor air and a humidity sensor installed in the inlet duct; the humidified air temperature sensor is installed behind the heater, the signal converters from the sensors, the level gauge, the water temperature sensor, a control unit, the inputs of which are connected through the signal converters from the sensors with the outputs of two humidified air temperature sensors, the outputs of the air humidity sensor and the water temperature sensor, and the outputs of the control unit are connected to the heater and air heater. N5 03 N3 C © O y> I