JPH10148483A - Heat-exchanger for air drier for air compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure wherein an air drier is manufactured in a space-saving manner at a low cost by a method wherein two heat-exchangers of one being a heat-exchanger to dehumidify drain in compressed air and the other being a heat-exchanger to effect reheating are integrally constituted. SOLUTION: Compressed air enters through an air inlet 2 of a heat-exchanger 1 for reheating compressed air and is subjected to a primary heat-exchange with air discharged from a drain separator 3. In this case, respective air is partitioned from each other by a plate 6 in a manner not to be mixed together. Primary heat-exchanged air then enters through an air intermediate inlet pipe 5 of a heat-exchanger 4 for dehumidification and is cooled and dehumidified. A refrigerant effects incoming through a refrigerant inlet 7 and effects outgoing through a refrigerant outlet 8. In this case, air entering through a refrigerant air intermediate inlet 5 forms a counterblow to a refrigerant and undergoes heat-exchange therewith. Air cooled and dehumidified by the heat-exchanger 1 for reheating is discharged from a cooling air outlet 9, drain is separated by a drain separator 3, and effects incoming through a cooling air inlet 10 of the heat-exchanger 1 for reheating compressed air and flows to an air outlet 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for an air dryer for dehumidifying drain in compressed air.

[0002]

2. Description of the Related Art Conventionally, as described in Japanese Patent Application No. 2-234427, a mechanism for dehumidifying a drain in compressed air has a drastically different structure.

The heat exchanger described in Japanese Utility Model Laid-Open Publication No. 7-14123 is intended for cooling, and there is no reheating or drain separation mechanism as in this case.

[0004]

In the prior art, the method of dehumidifying and separating the moisture in the compressed air has a completely different mechanism, occupies a large volume in the equipment, and has a heat exchanger. Is also required, which has been a major obstacle to cost reduction in manufacturing.

An object of the present invention is to provide a structure capable of manufacturing an air dryer with a small space and a low cost.

[0006]

[Means for Solving the Problems]

(1) Two heat exchangers, a heat exchanger for dehumidifying drain in compressed air and a heat exchanger for reheating, are integrally formed by welding with a partition plate having a through pipe as a boundary.

(2) A space room for drain separation is integrated between the welded heat exchangers of (1) by a welding structure similarly to (1).

[0008]

FIG. 1 shows a front view of the present invention. Compressed air discharged from a compressor body side enters through an air inlet 2 of a heat exchanger 1 for reheating compressed air, and a drain separator 3 is provided.
Primary heat exchange with the cooled and dried air discharged from the At this time, each air is completely separated by the plate 6 so that both fluids do not mix.

Next, the air which has been subjected to the primary heat exchange and cooled by about 10 ° C. enters through the intermediate air inlet pipe 5 of the heat exchanger 4 for dehumidification, which is welded to the heat exchanger 1 for reheating, and the refrigerant of the air dryer refrigeration cycle. Is exchanged with water, cooled and dehumidified. The refrigerant enters through the refrigerant inlet 7, exits through the refrigerant outlet 8, is drawn into the refrigerator of the air dryer, forms a Carnot cycle, and repeats the same. Here, the refrigerant air intermediate inlet 5
The air that has entered the air flows completely opposite to the refrigerant and undergoes heat exchange. As in the case of the reheating heat exchanger 1, both media are separated by a plate 6. Heat exchanger for reheating 1
The cooled and dehumidified air containing water is discharged from the cooling air outlet 9 to separate the drain by the drain separator 3, enters the cooling air inlet 10 of the heat exchanger 1 for reheating the compressed air, and raises the temperature of the air. , To the air outlet 11. The drain separated by the drain separator 3 is discharged from the drain trap 12 to the outside of the apparatus.

In the present invention, the above-described operation is achieved by the integral structure shown in FIGS. FIG. 1 is a front view of a heat exchanger according to one embodiment of the present invention. FIG. 2 shows a left side view thereof. FIG. 3 shows a right side view thereof.
The heat exchanger 1 for reheating and the heat exchanger 4 for dehumidification in FIG. 1 penetrate each room by the air intermediate inlet pipe 5, and the periphery thereof is joined by welding.

FIG. 4 shows a front view of a second embodiment of the present invention. The present invention provides a drain separator 3 for drain separation between a reheat heat exchanger 1 and a dehumidification heat exchanger 4 shown in FIG.
The drain separation chamber 21 having the function of (1) was constructed.

In FIG. 4, the compressed air discharged from the compressor body enters through an air inlet 14 of a reheating heat exchanger 13 and enters a dehumidifying heat exchanger 16 via an intermediate air inlet pipe 15.

The method of exchanging heat between the air at this time is the same as in the first embodiment. The intermediate air inlet pipe 15 is provided with the reheating heat exchanger 1 so that the fluids in the drain separation chamber 21 do not mix.
And the dehumidifying heat exchanger 16 are connected by welding. The air flowing through the dehumidifying heat exchanger 16 exchanges heat with the refrigerant side partitioned by the plate 17, and is cooled and dehumidified, as in the first embodiment. The cooled and dehumidified air enters the drain separation chamber 21 from the cooling air outlet 18, where the flow velocity of the air is reduced at once, and the drain is separated. Drain separation chamber 21
Has a sufficient volume so that the flow rate of the air in the dehumidifying heat exchanger 17 is reduced at a stretch.

The drain is separated in the drain separation chamber 21,
The cooling and drying air enters the reheating heat exchanger 13 as in the first embodiment, raises the air temperature, and is supplied from the air outlet 19 to pneumatic equipment outside the machine. The drain component separated in the drain separation chamber 21 is discharged to the drain trap 2 as in the embodiment.
From 0, it is discharged outside the machine.

FIG. 4 is a front view of a second embodiment of the present invention. FIG. 5 is a left side view thereof, and FIG. 6 is a right side view thereof.

As in the first embodiment, the reheating heat exchanger 13,
Each of the dehumidifying heat exchanger 16 and the drain separation chamber 21 is an integrated type having a welded structure.

[0017]

According to the present invention, a conventional separate heat exchanger can be integrated, and a very compact and low-cost heat exchanger can be obtained. Also, piping outside these heat exchangers is not required, and workability is improved.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the heat exchanger of the present invention.

FIG. 2 is a left side view of one embodiment of the heat exchanger of the present invention.

FIG. 3 is a right side view of one embodiment of the heat exchanger of the present invention.

FIG. 4 is a front view of a second embodiment of the heat exchanger of the present invention.

FIG. 5 is a left side view of a second embodiment of the heat exchanger of the present invention.

FIG. 6 is a right side view of a second embodiment of the heat exchanger of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger for reheating, 2 ... Air inlet, 3 ... Drain separator, 4 ... Heat exchanger for dehumidification, 5 ... Intermediate air inlet pipe, 6
... plate, 7 ... refrigerant inlet, 8 ... refrigerant outlet, 9 ... cooling air inlet, 10 ... cooling air inlet, 11 ... air outlet, 12 ...
Drain trap.

Claims (1)

[Claims] 1. An air dryer for an air compressor, which is arranged at a portion for dehumidifying moisture in compressed air, alternately circulates media for heat exchange inside a laminated partition plate, and the flow directions thereof are opposed to each other. One of the heat exchangers is configured to reheat the temperature of the compressed air, and the other is configured to cool the compressed air and condense the drain. A heat exchanger for an air dryer for an air compressor, characterized in that the heat exchanger is formed integrally and has a passage for allowing compressed air to pass through a partition between the two heat exchangers.