RU2607866C1 - Automatic air additional moistening system - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: invention relates to equipment of air conditioning and can be used for creation of comfortable microclimate conditions in production rooms, in particular as local air additional moistening systems. This is achieved by fact, that automatic air additional moistening system, consisting of air nozzles, networks of pipelines serving for supply of water and compressed air to them, and air nozzles operation control unit, additionally includes valve, which chamber is separated from discharge line by rubberized fabric membrane, and liquid passes through filtering washer, wherein with coil switching on control valve rises, and pressure over membrane falls, and valve opens, wherein nozzle is made pneumatic and comprises housing with supply of sprayed liquid and gas, jet-guiding device and sprayer, body is made in form of an inverted cup, in bottom of which there threaded hole is made for attachment of axially symmetric to body, central cylindrical insert with central axial channel of jet directing device for supply of sprayed liquid, and in body side surface, perpendicular to its axis, at least, one hole for air (gas) under pressure supply is made, which is connected to annular chamber, formed by central cylindrical insert outer surface and housing inner surface, and to housing inner side surface, in its lower part, jet-guiding device cylindrical sleeve is fixed for gas supply under pressure to sprayer by means of annular gap, formed by central cylindrical insert outer surface and sleeve inner surface, wherein annular gap is connected to annular chamber, and to central cylindrical insert sprayer is coaxially fixed, made in form of conical flared end, in lower part of which, perpendicular to its axis, end round plate is rigidly fixed with, at least, three conical throttling holes with apex angle of cone, lying in range from 45 to 90°, wherein on funnel side surface, at least, two rows of cylindrical orifices are made with axes, lying in planes perpendicular to funnel axis, and in each row, at least, three holes are made, jet-guiding device for air supply under pressure to sprayer is made helical, and formed by annular helical clearance, formed by central cylindrical insert outer surface and sleeve internal surface, on which helical grooves are made, wherein helical gap is connected to annular chamber, wherein inner surface of cylindrical throttling holes with axes, lying in planes perpendicular to funnel axis, is made helical.

EFFECT: technical result is increase in water pneumatic spraying process efficiency and reliability.

1 cl, 3 dwg

Description

The invention relates to techniques for air conditioning and can be used to create comfortable microclimate conditions in industrial premises, in particular as local dampening systems.

The closest technical solution to the claimed object is a system according to the patent of the Russian Federation No. 23033752, class. F24F 3/06 (prototype) comprising a spray gun and a control unit.

Its disadvantage is the relatively low efficiency of the pneumatic spraying process.

The technical result is an increase in the efficiency and reliability of the process of pneumatic spraying of water.

This is achieved by the fact that in an automatic air humidification system consisting of pneumatic nozzles, piping networks used to supply water and compressed air to them, and a pneumatic nozzle control unit, an additional valve is included, the chamber of which is separated from the pressure line by a rubberized fabric membrane and the liquid passes through the filter washer along a slit 0.3 mm high and a hole with a diameter of 1 mm, and when the coil is turned on, the control valve rises and the pressure above the membrane drops and the valve opens moreover, the valve is made with the following size ratios of its main elements, which are in the optimal range of values: H ₁ / L = 1.5 ... 2.0; H ₁ / D _y = 3.0 ... 30; where H ₁ - the height of the valve body assembly; L is the length of the passage; D _y - conditional diameter.

In FIG. 1 shows the control unit of the proposed system, in FIG. 2 is a frontal section of an electromagnetic valve; FIG. 3 - pneumatic nozzle.

The system of automatic humidification (Fig. 1) contains a hair moisture regulator of on-off action of the VDK, which controls the operation of two electromagnetic valves of the CBM (Fig. 2) installed on pipelines of water and compressed air. The chamber above the main valve 1 is separated from the pressure line by a membrane 2 of rubberized fabric with a thickness of 0.5 mm. The fluid in this cavity passes through a filter washer 3 through a slit 4 with a height of 0.3 mm and then through an opening with a diameter of 1 mm. When the coil is turned on, the control valve 5 rises, and the pressure above the membrane 2 drops, and the valve 1 opens. After turning off the valve, the spring 6 provides reliable closing of the valve.

The electromagnetic valve type SVM is made with the following size ratios of its main elements, which are in the optimal range of values: H ₁ / L = 1.5 ... 2.0; H ₁ / D _y = 3.0 ... 30; where H ₁ - the height of the valve body assembly; L is the length of the passage; D _y - conditional diameter.

The pneumatic nozzle (Fig. 3) contains a housing 12 made in the form of an inverted cup, in the bottom of which there is a threaded hole 8 for mounting an axisymmetric housing 12, a central cylindrical insert 7 with a central axial channel 9 of the flow guide device for supplying the sprayed liquid, and in the side surface housing 12, perpendicular to its axis, made at least one hole 14 for supplying air (gas) under pressure, which connects to the annular chamber 19, formed by the outer surface of the cent cial cylindrical insert 7 and the internal surface of the housing. To the inner side surface of the housing 12, in its lower part, a cylindrical sleeve 15 of the jetting device for supplying air (gas) under pressure to the atomizer is attached via an annular gap 16 formed by the outer surface of the central cylindrical insert 7 and the inner surface of the sleeve 15, while the annular gap 16 is connected to the annular chamber 19.

The directing device for supplying air (gas) under pressure to the atomizer is made screw and is formed by an annular screw gap 16 formed by the outer surface of the central cylindrical insert 7 and the inner surface of the sleeve 15, on which the helical grooves are cut, while the helical annular gap 16 is connected to the annular camera 19.

The directing device for supplying air (gas) under pressure to the atomizer is made screw and is formed by an annular screw gap 16 formed by the outer surface of the central cylindrical insert 7 on which the helical grooves are cut, and the inner surface of the sleeve 15, on which the helical grooves are cut, this helical annular gap 16 is connected with the annular chamber 19.

A nozzle made in the form of a conical socket 10 is coaxially attached to the central cylindrical insert 7, in the lower part of which, perpendicular to its axis, a circular end plate 11 is rigidly attached with at least three conical throttle openings 18 with an angle at the top of the cone lying in the range from 45 to 90 °. At least two rows of cylindrical throttle holes 17 with axes lying in planes perpendicular to the axis of the socket 10 are made on the side surface of the socket, and at least three holes are made in each row.

The inner surface of the cylindrical throttle holes 17 with axes lying in planes perpendicular to the axis of the socket 10, is made screw (not shown).

Pneumatic nozzle (Fig. 3) works as follows.

Liquid under pressure is supplied through an axial channel 9, made in the central cylindrical insert 7, to the atomizer in the form of a conical socket 10, from which part of the liquid flows out in the horizontal direction through the radial holes 17, and part in the vertical direction through the conical throttle openings 18. Air under pressure is supplied through the openings 14 to the annular chamber 19, and from it to the atomizer by means of an annular gap 16. In this case, multiple drops of liquid flows flowing from the throttle are crushed GOVERNMENTAL holes. The presence of gas inclusions in a liquid additionally perturbs its surface, which leads to wave formation and volumetric crushing of the liquid film. The loss of mechanical energy during external acceleration (on the external conical surface) is reduced compared with the same acceleration in a closed channel.

The nozzle can be used in various fields of technology, where it is required to create atomized fluid flows in both closed and open spaces, for example, in stationary fire extinguishing systems, and also in mechanical engineering for spraying fuel. In addition, the nozzle can be used in various technological processes, in which it is required to ensure high efficiency of heat and mass transfer processes when spraying liquids.

The system of automatic humidification works as follows.

If the air humidity in the workshop is lower than the set value, the VDK moisture regulator, to which a direct current of 24 V is supplied, sends a pulse to relay P ₂ , which closes its contacts K ₂ , after which power is supplied to relay P ₃ and valve SVM ₁ , which opens; as a result, compressed air is supplied to the nozzles. At the same time, capacitors C ₁ and C ₂ are charged. When the capacitors are charged to the supply voltage, the relay P _{3 is} activated and its contacts K ₃ supplies power to the relay P ₁ . Relay P ₁ has two pairs of normally open contacts. When shorted, one pair of contacts K ₁ bypasses the contacts K _{2 of} relay P ₂ , and the other supplies power to the valve CBM ₂ , which supplies water to the nozzles. The resistance R ₁ and the capacitors C ₁ and C _{2 are} selected in such a way that the water supply to the nozzles occurs 10 ... 15 s later than the air supply.

When the specified air humidity is reached in the workshop, the VDK moisture control contacts open, and power is removed from the CBM ₁ valve and from the relays P ₂ and P ₃ . The water supply to the nozzles is interrupted. Relay P _{2 is} disconnected and breaks its contacts, however, the power to the valve CBM ₁ , which supplies air to the nozzles, continues to be supplied, since the contacts K _{1 of} relay P ₁ remain closed. This is achieved due to the fact that the relay P ₃ remains on as a result of the discharge through its winding of capacitors C ₁ and C ₂ . When the capacitors are discharged, the relay P ₃ will turn off and, having opened its contacts K ₃ , will disconnect the relay P ₁ ; the latter is turned off and removes power from the valve SVM ₁ .

The circuit provides a delay time of relay P ₃ when disconnected for about one minute. During this time, compressed air manages to remove excess water from the system. Diode D-206 is installed so that the capacitors C ₁ and C _{2 are} not discharged through the relay P ₂ . The installation provides emergency protection of the system in case of pressure loss in the compressed air line or its drop below the set value (below 11 N / cm ² ). Protection is carried out using the pressure switch RD-1-01, installed behind the valve SVM ₁ . The relay shuts off the water supply to the nozzles. Water to the nozzles comes from the drinking water supply system and after the regulator RJ-1A at the nozzle installation level should have a pressure of ~ 2.0 N / cm ² . The action of the regulator RJ-1A is based on balancing the oppositely directed forces of elastic deformation of the spring and water pressure in the submembrane cavity. With fluctuations in the inlet pressure of ± 25%, the regulator maintains the outlet water pressure with an accuracy of ± 2%.

Claims (1)

The system of automatic air humidification, consisting of pneumatic nozzles, piping networks used to supply water and compressed air to them, and a pneumatic nozzle control unit, it additionally includes a valve, the chamber of which is separated from the pressure line by a rubberized fabric membrane, and the liquid passes through a filter washer along a slit 0.3 mm high and a hole with a diameter of 1 mm, and when the coil is turned on, the control valve rises, and the pressure above the membrane drops and the valve opens, and the valve l is made with the following size ratios of its main elements, which are in the optimal range of values: H ₁ / L = 1.5 ... 2.0; H ₁ / D _y = 3.0 ... 30; where H ₁ - the height of the valve body assembly; L is the length of the passage; D _у - nominal diameter, characterized in that the nozzle is made pneumatic and contains a housing with a supply of sprayed liquid and gas, a flow device and a sprayer, the housing is made in the form of an inverted cup, in the bottom of which there is a threaded hole for mounting an axisymmetric housing, a central cylindrical insert with the central axial channel of the flow-guiding device for supplying the sprayed liquid, and at least one is made in the side surface of the housing, perpendicular to its axis o a hole for supplying air (gas) under pressure, which connects to the annular chamber formed by the outer surface of the central cylindrical insert and the inner surface of the housing, and to the inner side surface of the housing, in its lower part, a cylindrical sleeve of the flow directing device for supplying gas under pressure is attached to the atomizer by means of an annular gap formed by the outer surface of the central cylindrical insert and the inner surface of the sleeve, wherein the annular gap is connected a ring chamber, and a nozzle made in the form of a conical socket is coaxially attached to the central cylindrical insert, in the lower part of which, perpendicular to its axis, a circular end plate is rigidly attached with at least three conical throttle openings with an angle at the apex of the cone lying in range from 45 to 90 °, with at least two rows of cylindrical throttle openings with axes lying in planes perpendicular to the axis of the bell, and on each row you can see at least three holes have been filled, the directing device for supplying air under pressure to the atomizer is screwed and formed by an annular screw gap formed by the outer surface of the central cylindrical insert and the inner surface of the sleeve on which the helical grooves are cut, while the helical annular gap is connected to the annular camera, while the inner surface of the cylindrical throttle holes with axes lying in planes perpendicular to the axis of the socket, perform on the screw.

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