JP2012130897A - Compressed air dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressed air dehumidifier capable of preventing the moisture separated once from returning into dehumidified secondary side compressed air, and capable of enhancing dehumidifying efficiency.SOLUTION: A heat exchanger 10 is provided in two stages of a first heat exchange part 20 and a second heat exchange part 30 so that dehumidification is carried out by heat exchange regarding primary side compressed air, and the dehumidified secondary side compressed air is delivered, and the second heat exchange part 30 is arranged beneath the first heat exchange part 20. This compressed air dehumidifier includes a first small chamber 14 to which an air outlet 32 of the second heat exchange part 30 is opened and which is opened to an inlet 22a of a reheating flow passage, and a second small chamber 15 to which an outlet 22b of the reheating flow passage is opened and which is opened to a delivery port 13 for delivering the secondary side compressed air. A moisture separating means 50 bending the flow of the compressed air and separating the moisture is provided between the outlet 22b of the reheating flow passage and the delivery port 13 in the inside of the second small chamber 15.

Description

  The present invention relates to a compressed air dehumidifier that dehumidifies primary compressed air introduced from a compressor such as a compressor that generates compressed air by heat exchange, and supplies the dehumidified secondary compressed air to pneumatic equipment. About.

  Conventionally, in a compressed air dehumidifier that dehumidifies compressed air in a hot and humid state introduced from a compressor that generates compressed air, heat exchange is performed so that moisture contained in the air is removed by agglomeration and condensation. And a device for cooling the compressed air through the heat exchanger (for example, a cooling medium such as a refrigerator or groundwater).

As such a compressed air dehumidifying device, for example, one having the following configuration has been previously proposed by the present applicant.
A plurality of baffles arranged alternately in a cylindrical container having an inlet for introducing compressed air, an outlet for discharging dehumidified compressed air, and a drain outlet for discharging condensed water generated by dehumidification An evaporator in which fins and a plurality of baffle fins arranged between the fins are respectively attached to the refrigerant pipe is accommodated, and a lower opening with respect to the cylinder length direction of the container between each fin and the inner wall of the container And a heat exchanger in which a compressed air flow path through which compressed air passes through both openings is formed between the introduction port and the discharge port. A lower end surface that forms a lower opening with the inner wall of the container is formed so as to gradually separate from the horizontal installation surface from one end to the other end on the horizontal installation surface side (see Patent Document 1). ). According to this, it is possible to sufficiently enhance the dehumidifying effect.

  Further, in order to suitably enhance the dehumidifying effect, a heat exchanger is provided in two stages of a first heat exchanger part and a second heat exchanger part, and the first heat exchanger part is compressed on the primary side. The cooling flow path related to the compressed air on the primary side and the flow path for reheating related to the compressed air on the secondary side are mixed so as to pre-cool the air and reheat the compressed air on the secondary side. The second heat exchanger section is dehumidified by causing condensation to occur by cooling the compressed air precooled in the first heat exchanger section with a cooling medium. There is a compressed air dehumidifier provided to do so.

As such a compressed air dehumidifying device, for example, one having the following configuration has been previously disclosed by the present applicant (see Patent Document 2).
As shown in FIG. 3, the heat exchanger 10 which dehydrates the moisture contained in the compressed air pumped by an air compressor (not shown) and a refrigeration cycle 40 for cooling the compressed air are provided. The heat exchanger 10 is configured to be able to discharge the compressed air introduced from the introduction port 12 through the discharge port 13 through a gas flow path including the primary cooling unit 20A, the secondary cooling unit 30A, and the reheating unit 20B. Yes. Further, in the heat exchanger 10, drain traps 18 for discharging moisture generated by dehumidification to the outside of the apparatus are disposed at the drain discharge ports 16A and 17A, respectively. On the other hand, the refrigeration cycle 40 is disposed in the secondary cooling part 30A of the heat exchanger 10 and is an evaporator 41 that cools the compressed air by the heat of vaporization of the refrigerant, and a compression that pumps the vaporized refrigerant with a constant pumping capacity. And a condenser 43 for condensing and liquefying the compressed vaporized refrigerant, a receiver 44 for temporarily storing the liquefied refrigerant, and a capillary tube 45 for reducing the pressure of the liquefied refrigerant.

  In this dehumidifier, first, the compressor 42 is driven to circulate the refrigerant in the refrigeration cycle 40. At this time, the liquefied refrigerant in the liquid receiver 44 passes through the capillary tube 45 and is discharged into the evaporator 41, and the liquefied refrigerant is vaporized in the evaporator 41, whereby the secondary cooling unit of the heat exchanger 10. 30A is cooled. By driving an air compressor (not shown) in this state, compressed air containing moisture is introduced from the inlet 12. Further, the compressed air introduced into the heat exchanger 10 is precooled when passing through the primary cooling unit 20A, and then, when passing through the secondary cooling unit 30A, is reduced to a predetermined dew point temperature or less by the evaporator 41. To be cooled. At this time, moisture in the compressed air is condensed as condensed water on the surfaces of the fins attached to the evaporator 41, and this condensed water flows down toward the bottom of the heat exchanger 10 and is discharged from the drain outlet 16A to the outside. To be discharged. On the other hand, the compressed air dehumidified in the secondary cooling unit 30A is reheated by the compressed air introduced from the introduction port 12 and discharged from the discharge port 13 when passing through the reheating unit 20B.

JP 2003-329387 A (Claim 1, FIG. 1) JP 2001-183014 A (FIG. 1, [0002], [0003])

The problem to be solved regarding the compressed air dehumidifier is that when the compressed air pressure drops and the flow velocity increases, the water once separated is rolled up into the dehumidified secondary compressed air. It is to return by the phenomenon and to reduce the dehumidifying effect.
Accordingly, an object of the present invention is to provide a compressed air dehumidifying device that prevents the once separated water from returning to the dehumidified secondary compressed air and can enhance the dehumidifying effect.

The present invention has the following configuration in order to achieve the above object.
According to one aspect of the compressed air dehumidifying apparatus of the present invention, the primary compressed air introduced from the compressor is dehumidified by heat exchange, and the dehumidified secondary compressed air is discharged to the pneumatic equipment. In addition, the heat exchanger is provided in two stages of a first heat exchanger part and a second heat exchanger part, and the first heat exchanger part precools the compressed air on the primary side and secondary By arranging the cooling flow path related to the compressed air on the primary side and the flow path for reheating related to the compressed air on the secondary side so as to reheat the compressed air on the side A compression provided so that the second heat exchanger section dehumidifies by causing condensation by cooling the compressed air pre-cooled in the first heat exchanger section with a cooling medium. In the air dehumidifier, the second heat exchanger unit is disposed below the first heat exchanger unit. A small chamber that opens at the air outlet of the second heat exchanger section and opens at the inlet of the reheating channel, and water generated by condensation flows downward and is separated from the compressed air. A first chamber, a first drain outlet provided in a lower portion of the first chamber, and an outlet of the reheating channel, and the compressed air on the secondary side is discharged to a pneumatic device. A second chamber that is open to the discharge port of the second chamber and retains the compressed air immediately before being discharged, and a second drain port provided at a lower portion of the second chamber. Water separation means for separating water by bending the flow of compressed air is provided inside the small chamber and between the outlet of the reheat channel and the outlet.

Moreover, according to one form of the compressed air dehumidifying apparatus which concerns on this invention, the said water separation means was provided by connecting with the discharge port so that a water | moisture content might be isolate | separated by an inertia force by bending the flow of compressed air. It is a water coagulation baffle plate provided so that water contained in the compressed air is separated by agglomeration when the water separation conduit and / or the compressed air collides and bends the flow. It can be.
Moreover, according to one form of the compressed air dehumidifying apparatus according to the present invention, the water separation conduit is opposite to the side facing the outlet of the reheating channel so that the flow of the compressed air is reversed. It can be characterized by opening to the side.

Moreover, according to one form of the compressed air dehumidification apparatus which concerns on this invention, the said water-separation pipe line is the curved shape, Comprising: The edge part of the pipe line is opening, It can be characterized by the above-mentioned.
Moreover, according to one form of the compressed air dehumidification apparatus which concerns on this invention, the edge part of the said baffle for water aggregation can be turned back in the direction opposite to the flow direction of compressed air.

  Further, according to one embodiment of the compressed air dehumidifying apparatus according to the present invention, the primary compressed air introduced from the compressor is dehumidified by heat exchange, and the dehumidified secondary compressed air is discharged to the pneumatic equipment. Thus, in the compressed air dehumidifier provided so that the heat exchanger section dehydrates by cooling the compressed air with the cooling medium, the compressed air immediately before being discharged is retained. And a small chamber that opens to an outlet for discharging the compressed air on the secondary side to the pneumatic device, and a drain port provided at a lower portion of the small chamber. A water separating means is provided in the small chamber and between the air outlet and the outlet for separating water by bending the flow of compressed air.

  According to the compressed air dehumidifying apparatus according to the present invention, it is possible to prevent the moisture once separated from returning to the compressed air on the dehumidified secondary side and to enhance the dehumidifying effect. Play.

It is sectional drawing which shows the example of a form of the compressed air dehumidification apparatus which concerns on this invention. It is principal part sectional drawing which shows the other example of a compressed air dehumidification apparatus which concerns on this invention. It is sectional drawing which shows the conventional compressed air dehumidification apparatus.

Hereinafter, an example of a compressed air dehumidifier according to the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 and 2).
In this compressed air dehumidifier, the heat exchanger 10 performs first dehumidification on the primary compressed air introduced from the compressor by heat exchange, and the dehumidified secondary compressed air is discharged to the pneumatic equipment. The first heat exchanger unit 20 and the second heat exchanger unit 30 are provided in two stages, and the first heat exchanger unit 20 precools the primary side compressed air and the secondary side compressed air. In order to perform reheating, the cooling flow path 21 related to the compressed air on the primary side and the reflow flow path 22 related to the compressed air on the secondary side are arranged so as to intersect with each other, The second heat exchanger section 30 is provided so as to dehumidify by generating condensation by cooling the compressed air precooled in the first heat exchanger section 20 with a cooling medium.

  The heat exchanger 10 according to the present embodiment is provided in a form incorporated in a cylindrical body 11 whose both ends are closed. An upper part of the cylindrical body 11 is provided with an inlet 12 for primary compressed air introduced from the compressor and an outlet 13 for discharging the dehumidified secondary compressed air to the pneumatic equipment. Yes. In the heat exchanger 10, the second heat exchanger unit 30 is disposed below the first heat exchanger unit 20.

  Further, in the first heat exchanger section 20 of the present embodiment, the cooling flow constituted by the closed space that opens to the air inlet 31 of the second heat exchanger section 30 while the inlet 12 opens. A path 21 and a reheating flow path 22 crossing the cooling flow path 21 in the horizontal direction are provided. The flow path 22 for reheating is provided in a pipe shape, and is provided so as to communicate a first small chamber 14 and a second small chamber 15 described later. In the first heat exchanger section 20, in order to improve the heat exchange performance, actually, a large number of heat exchange pipes (reheat flow paths 22) are disposed.

  Further, in the second heat exchanger section 30 of the present embodiment, the cooling pipe 33 through which the cooling medium flows, the numerous heat exchange fins 34 attached to the cooling pipe 33, and the flow of compressed air are zigzaged. A plurality of plates 35 arranged at intervals to be bent. The second heat exchanger section 30 can be, for example, an evaporator of a refrigerator (refrigeration cycle 40 (see FIG. 3)), and is efficiently compressed air by the refrigerant circulating in the cooling pipe 33. Can be cooled.

  Reference numeral 14 denotes a first small chamber, which is a small chamber that opens to the inlet 22a of the reheating flow path while the air outlet 32 of the second heat exchanger section 30 opens, and water generated by condensation flows downward. So as to be separated from the compressed air. The first small chamber 14 is provided on one end side of the cylindrical body 11, and compressed air discharged from the second heat exchanger section 30 is supplied to the first heat exchanger section 20. It is a staying space that guides to the reheating flow path 22. Further, a first drain port 16 is provided in the lower portion of the first small chamber 14, and a drain trap 18 (see FIG. 3) is attached to the first drain port 16. Thereby, water (condensation water) generated by condensation can be suitably drained from the bottom of the cylindrical body 11.

  Reference numeral 15 denotes a second small chamber, which is a small chamber opened at the discharge port 13 for discharging the compressed air on the secondary side to the pneumatic equipment while the outlet 22b of the reheating channel is opened, and immediately before being discharged. The compressed air is retained. The second small chamber 15 is provided on the other end side of the cylindrical body 11, and the compressed air discharged from the first heat exchanger section 20 (reheating flow path 22) is removed. It is a staying space for guiding to the discharge port 13. In addition, a second drain port 17 is provided in the lower portion of the second small chamber 15, and a drain trap 18 (see FIG. 3) is attached to the second drain port 17.

  Then, the flow of compressed air (see the arrow in the figure) is bent between the outlet 22b of the reheating channel and the outlet 13 inside the second small chamber 15 to separate moisture. Water separation means are provided. According to this, the moisture once separated can be prevented from returning to the dehumidified secondary compressed air, and the dehumidifying effect can be enhanced. Moreover, since the external shape is not changed, there is no need to change the mounting conditions, and versatility can be maintained.

  As this water separation means, it is possible to employ a water separation conduit 50 provided connected to the discharge port 13 so that moisture is separated by inertia force by bending the flow of compressed air. According to this, although it is a simple structure, a water | moisture content and compressed air can be isolate | separated efficiently. Further, the ventilation resistance (pressure loss) is small, and the dehumidified compressed air can be supplied efficiently.

  Further, the water separation conduit 50 of the present embodiment is opened on the side opposite to the side facing the outlet 22b of the reheating channel so that the flow of the compressed air is reversed. According to this, the water | moisture content made into water droplets can be isolate | separated efficiently by the effect by an inertia force, and the dehumidified compressed air can be supplied efficiently.

Further, as in the embodiment shown in FIG. 1, the water separation conduit 50 has a curved shape and the end 51 of the conduit is open, so that an increase in ventilation resistance is minimized. It can be manufactured at a low cost.
The form of the water separation conduit 50 is not limited to this. For example, as shown in FIG. 2, the water separation conduit 50 is a straight pipe having a closed end and is connected to the outlet 22 b of the reheating channel. It is good also as a shape etc. which the opening part 55 was provided in the side peripheral surface opposite to the facing side.

  Further, as the water separation means, a water aggregation baffle plate 60 provided so as to be separated by aggregating moisture contained in the compressed air when the compressed air collides and bends the flow is adopted. (See FIG. 2). According to this, water can be aggregated to form larger water droplets, and the water can be more efficiently separated from the compressed air. In addition, the water coagulation baffle plate 60 has a simple configuration and low ventilation resistance, and can effectively separate moisture.

  Further, since the edge 61 of the baffle plate 60 for water aggregation is folded back in the direction opposite to the flow direction of the compressed air, it is possible to prevent the condensed water from being scattered again and to improve the separation efficiency of the water and the compressed air. Can be increased. In addition, a water droplet tubular passage, a rib-shaped guide portion, and the like may be provided as appropriate so that the condensed water droplets appropriately flow down to the bottom of the cylindrical body 11.

  In the above, the water separation conduit 50 and the water coagulation baffle plate 60 have been described separately as the water separation means, but it is needless to say that both may be provided as shown in FIG. According to this, a synergistic effect is produced for water separation, and it becomes possible to perform more efficient separation of moisture and compressed air.

The configuration relating to the water separation means of the above invention can be suitably applied even to a compressed air dehumidifier having only a configuration in which the heat exchanger section is basically cooled by the cooling medium.
That is, the heat exchanger section cools the compressed air so that the primary compressed air introduced from the compressor is dehumidified by heat exchange and the dehumidified secondary compressed air is discharged to the pneumatic equipment. In a compressed air dehumidifying device provided to dew condensation by cooling with a medium, an air outlet of the heat exchanger unit opens and retains the compressed air immediately before being discharged. A small chamber that opens to a discharge port for discharging the compressed air on the secondary side to the pneumatic device, and a drain port provided at a lower portion of the small chamber, the air outlet and the discharge port inside the small chamber The compressed air dehumidifier can be provided with a water separation means that bends the flow of compressed air to separate the water.
Also by this, the water once separated can be prevented from returning to the dehumidified secondary compressed air, and the dehumidifying effect can be enhanced.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Heat exchanger 11 Cylindrical body 12 Inlet port 13 Outlet port 14 1st small chamber 15 2nd small chamber 16 1st drain port 17 2nd drain port 20 1st heat exchanger part 21 For cooling Channel 22 Reflow channel inlet 22a Reheat channel inlet 22b Reheat channel outlet 30 Second heat exchanger section 31 Air inlet 32 Air outlet 33 Cooling pipe 40 Refrigeration cycle 50 Pipe for water separation 51 End of pipe 60 Baffle for water aggregation 61 Edge

Claims (7)

The heat exchanger dehumidifies the primary compressed air introduced from the compression device by heat exchange, and discharges the dehumidified secondary compressed air to the pneumatic equipment. 2 in the two stages of the heat exchanger section, the first heat exchanger section pre-cools the primary side compressed air and reheats the secondary side compressed air. A cooling flow path related to the compressed air and a reheating flow path related to the compressed air on the secondary side are arranged so as to intersect with each other, and the second heat exchanger section is provided with the first heat exchanger section. In the compressed air dehumidifying device provided to dehumidify by generating condensation by cooling the compressed air pre-cooled in the heat exchanger section of 1 with a cooling medium,
The second heat exchanger part is disposed below the first heat exchanger part, and an air outlet of the second heat exchanger part is opened, and at the inlet of the reheating channel. A first chamber that is an open chamber, in which water generated by condensation flows downward and is separated from the compressed air; a first drain port provided in a lower portion of the first chamber; A second chamber that is open to an outlet for discharging the compressed air on the secondary side to the pneumatic device and retains the compressed air immediately before being discharged, A second drainage port provided at the bottom of the second chamber,
Water separation means for separating water by bending the flow of compressed air is provided inside the second small chamber and between the outlet of the reheat channel and the outlet. Compressed air dehumidifier.   The water separation means bends the flow by colliding with a water separation conduit and / or compressed air that is connected to the discharge port so that moisture is separated by inertial force by bending the flow of the compressed air. 2. The compressed air dehumidifying device according to claim 1, which is a water coagulation baffle plate provided so that moisture contained in the compressed air is separated by agglomeration.   3. The compression according to claim 2, wherein the water separation pipe is opened on the side opposite to the side facing the outlet of the reheating channel so that the flow of the compressed air is reversed. Air dehumidifier.   The compressed air dehumidifier according to claim 2, wherein the water separation pipe has a curved shape, and an end of the pipe is open.   The compressed air dehumidifier according to any one of claims 2 to 4, wherein an edge portion of the baffle for water aggregation is folded back in a direction opposite to a flow direction of the compressed air. In order to dehumidify the compressed air on the primary side introduced from the compressor by heat exchange, and to discharge the dehumidified secondary compressed air to the pneumatic equipment, the heat exchanger section uses the cooling medium as a cooling medium. In the compressed air dehumidifying device provided to dew condensation by causing condensation by cooling,
A small chamber opening an air outlet of the heat exchanger section so as to retain the compressed air immediately before being discharged, and opening a discharge port for discharging the compressed air on the secondary side to the pneumatic device; With a drain outlet provided at the bottom,
A compressed air dehumidifying device, characterized in that water separation means for separating water by bending a flow of compressed air is provided inside the small chamber and between the air outlet and the outlet.   The water separation means bends the flow by colliding with a water separation conduit and / or compressed air that is connected to the discharge port so that moisture is separated by inertial force by bending the flow of the compressed air. The compressed air dehumidifying device according to claim 6, which is a water coagulation baffle plate provided so that moisture contained in the compressed air is separated by agglomeration.

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