JP6565101B2 - Humidity control air generator - Google Patents

Description

  The present invention relates to an apparatus that generates humidity-adjusted air (dew point control), and more particularly to a small apparatus that generates a relatively small flow rate of conditioned air.

An example of this type of conditioned air generator is disclosed in Patent Document 1.
This humidity control air generator supplies air whose humidity is adjusted (dew point control) to the glove box, and includes a moisture absorption rotor. The moisture absorption rotor is divided into three zones: an adsorption zone, a purge zone, and a regeneration zone. It is divided and can be rotated by a motor. In addition, this apparatus includes a conduit that allows the outside air, the return air from the regeneration zone, and the air mixed with the atmosphere from the glove box to pass through the adsorption zone, and a bypass pipe that communicates the upstream side and the downstream side of the adsorption zone. It has a road. A motor damper is provided in the bypass line.

  And based on the detection value of the dew point detector arrange | positioned in a glove box, the inside of a glove box is made to become a setting dew point by combining reproduction | regeneration temperature proportional control and flow control of a bypass line.

  However, in this conventional apparatus, the moisture absorption rotor always rotates, and not only the outside air but also the return air from the regeneration zone of the moisture absorption rotor and the atmosphere from the glove box are introduced into the adsorption zone of the moisture absorption rotor. Fluctuations in the pressure and temperature of the air flowing through the piping system of the apparatus are relatively large, and the dew point of the dry air after passing through the adsorption zone and the air mixed with the dry air through the bypass pipe is constantly changing.

Then, these two types of air whose dew point is constantly fluctuating are mixed while controlling the flow rate so that the mixed air becomes the set dew point. Therefore, the dew point control is complicated, and therefore the set dew point can be set with a certain degree of accuracy. Even if it can be maintained, it is difficult to maintain the set dew point with high accuracy.
In addition, this configuration using a hygroscopic rotor complicates the device configuration, and increases manufacturing costs and maintenance costs.

JP 2014-34012 A

  Therefore, the subject of this invention is providing the humidity control air generator which can generate the air which adjusted humidity with high precision.

In order to solve the above problems, the present invention provides a compressor that sucks outside air to generate compressed air, an air dryer connected to the output side of the compressor via a first pipe, and an output of the air dryer. A moisture separation membrane connected to the side through a second pipeline, a humidity control air discharge conduit connected to the output side of the moisture separation membrane, and a midway of the humidity control air discharge conduit A humid air supply pipe connecting the first flow control valve, the middle of the second pipe, and the downstream side of the first flow control valve in the humidity control air discharge pipe; and the humid air A second flow control valve arranged in the middle of the supply line, a dew point meter for measuring the dew point of the air discharged from the humidity control air discharge line, and a drain tank for storing condensed water discharged from the compressor And in the drain tank Drainage from the drain tank is performed so that a space is always formed above the surface of the condensed water, and further upstream of the first flow control valve in the humidity control air discharge pipe and the second Additional humid air supply for connecting any one of the middles of the pipeline and the space of the drain tank, the space of the drain tank, and the input side of the second flow control valve And the second flow rate control valve is capable of controlling the amount of air supplied from the humid air supply line and the additional humid air supply line, respectively, A control unit is provided for controlling the first and second flow control valves so that the dew point of the air discharged from the humidity-controlled air discharge pipe is set to a preset value based on the measured value of the dew point meter . It is characterized by being It is obtained by constituting the humidity air generating device.

According to the present invention, normally, in the second flow rate control valve, the air supply from the additional humid air supply line is set to zero, and only the flow rate of the air supplied from the humid air supply line is controlled. to control the first and second flow rate control valve based on a measurement of the dew-point instrument, the compressor, the dry air that has been dried through the air dryer and the water separation membrane, supplied from the humid air supply line By mixing the humid air, air having a preset dew point is generated.
In this case, by keeping the discharge pressure of the compressor constant and the temperature of the air dryer constant, the dew point of the humid air input to the second flow control valve through the humid air supply pipe can be maintained constant.

Since dry air with a constant dew point and humid air with a constant dew point are mixed while adjusting the flow rate ratio, high-precision humidity-adjusted air can be generated from the humidity control air discharge pipe at the set dew point. Can do.
If the damp air is temporarily insufficient, the second flow rate control valve uses air supplied from the damp air supply line and air having a higher dew point than that supplied from the additional damp air supply line. By mixing while adjusting the flow rate ratio and mixing the mixed air with the dry air as humid air, it is possible to quickly generate air adjusted to the set dew point.

  Furthermore, according to the present invention, the apparatus configuration is very simple and compact as compared with the case where a conventional hygroscopic rotor is used, and the manufacturing cost and the maintenance cost are reduced.

It is a figure which shows schematic structure of the humidity control air generator by one Example of this invention. It is a figure similar to FIG. 1 which shows schematic structure of the humidity control air generator by another Example of this invention. It is a figure similar to FIG. 1 which shows schematic structure of the humidity control air generation device by another Example of this invention.

Hereinafter, the configuration of the present invention will be described based on preferred embodiments with reference to the accompanying drawings.
FIG. 1 is a diagram showing a schematic configuration of a humidity control air generator according to one embodiment of the present invention. In this embodiment, the humidity control air generation device is provided in a glove box and supplies air whose humidity is adjusted (dew point control) to the glove box.
In the present invention, a humidity-controlled air generator having an air generation flow rate of about 1000 liters per hour is assumed.

  Referring to FIG. 1, according to the present invention, a compressor 1 for sucking outside air to generate compressed air, an air dryer 2 connected to the output side of the compressor 1 via a first pipe line 4, A moisture separation membrane 3 connected to the output side of the air dryer 2 via the second pipeline 5 and a humidity control air discharge pipeline 6 connected to the output side of the moisture separation membrane 3 are provided.

  The humidity control air discharge pipe 6 communicates with the internal space of the glove box 12, and the glove box 12 is provided with a suitable exhaust device (not shown). And the quantity of air discharged | emitted from the glove box 12 is supplied from a humidity control air generator, and the inside of the glove box 12 is always ventilated.

  Further, a first flow control valve 7 is arranged in the middle of the humidity control air discharge pipe 6, and the downstream side of the first flow control valve 7 in the humidity control air discharge pipe 6 and the middle of the second pipe 5. Are connected by a humid air supply line 8. A second flow control valve 9 is disposed in the humid air supply pipe 8.

  Further, a dew point meter 10 for measuring the dew point of the air discharged from the humidity control air discharge pipe 6 is provided. In this embodiment, the dew point meter 10 is disposed in the glove box 12.

  Further, based on the measured value of the dew point meter 10, the first and second flow control valves 7 and 9 are controlled so that the dew point of the air discharged from the humidity control air discharge pipe 6 becomes a preset value. A control unit 11 is provided.

  In the above configuration, the setting value of the dew point in the glove box 12 is input to the control unit 11, and after the discharge pressure of the compressor 1 and the temperature of the air dryer 2 are set to constant values, the apparatus is started.

  Then, the first and second flow rate control valves 7 and 9 are controlled based on the measured value of the dew point meter 10, and the dry air dried through the compressor 1, the air dryer 2, and the moisture separation membrane 3 is moist air. By mixing the humid air supplied from the supply pipe 8, the air whose humidity is adjusted to the set value of the dew point is supplied from the humidity control air discharge pipe 6 to the glove box 12.

In this case, since the discharge pressure of the compressor 1 and the temperature of the air dryer 2 are constant, the dew point of the humid air input to the second flow rate control valve 9 through the humid air supply pipe 8 is maintained constant.
The dry air having a constant dew point and the humid air having a constant dew point are mixed while the flow rate ratio is adjusted, so that air whose humidity is adjusted (dew point control) with high accuracy to the set dew point is obtained.

  In addition, the apparatus of the present invention has a very simple and compact configuration as compared with the case where a conventional hygroscopic rotor is used, and the manufacturing cost and the maintenance cost are reduced.

In the embodiment of FIG. 1, depending on the work in the glove box 12, a large amount of ventilation is required temporarily, and accordingly, a large amount of air must be temporarily supplied from the humidity control air generator. In some cases, the amount of humid air is insufficient with only the humid air supplied from the second conduit 5 through the humid air supply conduit 8, and the dew point in the glove box greatly deviates from the set value for a long time. There is a risk that.
2 and 3 show an embodiment that can cope with such a case.

The embodiment of FIG. 2 differs from the embodiment of FIG. 1 only in the configuration for supplying humid air. Therefore, in FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted below.
Referring to FIG. 2, in this embodiment, an additional humid air supply line 13 that connects the middle of the first line 4 and the input side of the second flow rate control valve 9 ′ is further provided. In this case, the second flow rate control valve 9 ′ can adjust the flow rate of air supplied from the additional humid air supply line 13 and the flow rate of air supplied from the second line 5 respectively. Yes.

According to this configuration, in addition to the air flowing through the second pipeline 5 as the humid air, air having a higher dew point than flowing through the first pipeline 4 is taken in and mixed with the dry air from the moisture separation membrane 3 can do.
Normally, the air supply from the additional humid air supply line 13 is set to zero, and only the flow rate of the air supplied from the second line 5 is controlled as in the embodiment of FIG. When the damp air is temporarily insufficient, the flow ratio is adjusted between the air supplied from the second pipe 5 and the air supplied from the first pipe 4 through the additional damp air supply pipe 13. The mixed air is mixed with dry air as moist air.

  The embodiment of FIG. 3 also differs from the embodiment of FIG. 1 only in the configuration for supplying moist air. Therefore, in FIG. 3, the same components as those shown in FIG.

  Referring to FIG. 3, in this embodiment, a drain tank 14 that stores condensed water discharged from the compressor 1 is further provided. The drain tank 14 is provided with a discharge valve 14b, and the drain valve 14b is controlled to open and close, and the drain tank 14 is drained so that a space 14a is always formed above the surface of the condensed water in the drain tank 14. The

  Further, in this embodiment, the upstream side of the first flow control valve 7 of the humidity control air discharge pipe 6 and the space 14a of the drain tank 14 are connected by the blower pipe 15 and the space 14a of the drain tank 14 is connected. The input side of the second flow rate control valve 9 ″ is connected by an additional humid air supply line 16.

A part of the air flowing through the humidity control air discharge pipe 6 flows into the space 14 a of the drain tank 14 and is mixed with the humid air in the space 14 a, and then passes through the additional humid air supply pipe 16 and passes through the second humid air supply pipe 16. Flows toward the second flow control valve 9 ″.
In this embodiment, the humidity control air discharge pipe 6 and the space 14a of the drain tank 14 are connected by the blower pipe 15, but the blower pipe is connected between the second pipe 5 and the space 114a of the drain tank 14. You may connect by the path 15.

  The second flow control valve 9 ″ may control the amount of air supplied from the humid air supply line 8 and the additional humid air supply line 16, respectively.

According to this configuration, in addition to the air flowing through the second pipeline 5 as humid air, air having a high dew point in the space 14 a of the drain tank 14 is taken in and mixed with the dry air from the moisture separation membrane 3. be able to.
Normally, the air supply from the additional humid air supply line 15 is zeroed, and only the flow rate of the air supplied from the second line 5 is controlled as in the embodiment of FIG. When the damp air is temporarily insufficient, the flow rate ratio between the air supplied from the second pipe 5 and the air supplied from the space 14a of the drain tank 14 through the additional damp air supply pipe 16 is increased. Mix while adjusting and mix the mixed air with the dry air as moist air.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Air dryer 3 Moisture separation membrane 4 1st pipe line 5 2nd pipe line 6 Humidity control air discharge pipe 7 1st flow control valve 8 Wet air supply line 9, 9 ', 9 "2nd Flow control valve 10 Dew point meter 11 Control unit 12 Glove box 13 Additional humid air supply line 14 Drain tank 14a Space 14b Drain valve 15 Blower line 16 Additional humid air supply line

Claims (1)

A compressor that sucks in outside air and generates compressed air;
An air dryer connected to the output side of the compressor via a first conduit;
A moisture separation membrane connected to the output side of the air dryer via a second conduit;
A humidity control air discharge line connected to the output side of the moisture separation membrane;
A first flow control valve disposed in the middle of the humidity control air discharge pipe;
A humid air supply line connecting the middle of the second line and the downstream side of the first flow rate control valve in the humidity control air discharge line;
A second flow control valve disposed in the middle of the humid air supply line;
A dew point meter for measuring the dew point of the air discharged from the humidity control air discharge pipe;
A drain tank for storing condensed water discharged from the compressor, and drainage from the drain tank is performed so that a space is always formed above the surface of the condensed water in the drain tank,
An air duct connecting the upstream side of the first flow rate control valve in the humidity control air discharge pipe and the middle of the second pipe with the space of the drain tank;
An additional wet air supply line connecting the space of the drain tank and the input side of the second flow rate control valve, wherein the second flow rate control valve includes the wet air supply line and Each of the amount of air supplied from the additional humid air supply line can be controlled, and
Based on the measured value of the dew-point meter, comprising a control unit for controlling the humidity of the first and second flow control valve as the dew point of the air is preset value emitted from the air discharge line A humidity-controlling air generator characterized by that.

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