KR100249657B1 - Heat exchange structure and making method - Google Patents

Abstract

The present invention relates to a method for improving and forming a heat exchanger in a compressed air dehumidifier, in particular, a heat exchanger in a precooling chamber (primary cooling chamber), wherein the corrugated plate covers a heat exchange pipe that is a precooling stage of compressed air. The heat exchange efficiency can be increased without being influenced by the outside air, and the capacity of the evaporator of the refrigeration cycle used for the second cooling can be coped with. It relates to the internal and external cylinder structure and the manufacturing method of the heat exchanger of the compressed air dehumidification apparatus that can be installed on the side of the hard plate more than the conventional refrigerant pipe and baffle fin to increase the heat exchange efficiency.

Description

Internal and external cylinder structure in heat exchanger of compressed air dehumidifier and manufacturing method

1 is an exploded perspective view of a device according to the present invention.

2 is a longitudinal sectional view of a heat exchanger.

3 is a panoramic plan view of a corrugated plate mounted to cover a heat exchange pipe according to the present invention.

4 is a panoramic plan view showing an example of piping of a heat exchange pipe to a corrugated plate showing a second embodiment of the apparatus according to the present invention.

5 is a partial perspective wave cross-sectional view of an embodiment according to the present invention.

6 is a cross-sectional view taken along line A-A of FIG.

7 is a plan view of a corrugated plate covering the heat transfer ring.

8 is a partial cross-sectional view showing an apparatus condition of the evaporator of the heat exchanger of the prior art and the present embodiment.

9 is a longitudinal sectional view of a device displaying the prior art.

* Explanation of symbols for main parts of the drawings

1: inner barrel 2: dehumidification passage

3, 4: tube plate 5: outer cylinder

6: precooling passage 7, 8: hard board

9: collection room 10: outer cylinder

11: air inlet 12: air outlet

13: contact 14: inner barrel

15 heat exchanger plate 16 evaporator

17: original 19, 20: tube

22: heat exchange pipe 24: corrugated plate

26: hole 27: euro

30: outer cylinder 31: air inlet

32: air outlet 34: inner cylinder

36, 37: tube 38: sealing material

40: block 42, 43: hard board

44: heat exchange pipe 46: corrugated plate

48: air passage hole 50: communication port

52 refrigerant tube 54 baffle fin

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving and forming a heat exchanger structure in a compressed air dehumidifier, particularly a precooling chamber (primary cooling chamber).

Conventionally, as this type of heat exchanger, one end of the metal inner cylinder 1 forming the dehumidification passage 2 is fixed to an annular tube 4 as shown in FIG. At the same time, the other end is closed with a disc shaped tube 3, and the outer peripheral side surfaces of the tube 3 and 4 are fixed to the inner peripheral surface of the outer cylinder 5 to fix the gap between the inner and outer cylinders 1 and 5. The precooling passages 6 closed by both tube plates 3 and 4 are formed in the chamber, and heat exchange pipes are provided between the tube plates, and both ends of the outer tube 5 are attached to the plate 7, (8), welding is fixed and the one end of one of the hard plate 7, the annular tube 3 and the outer cylinder (5) to seal the open end side of the dehumidification passage (2), and the other hard plate ( It is known that the air inlet 11 and the air outlet 12 were provided in the outer cylinder 5 in the collection chamber 9 provided between 8) and the disk shaped tube 4. -59820).

In such a conventional structure, the tube and the outer cylinder are fixed by welding.

However, in the case of such a conventional compressed air dehumidifier, although it is configured to exchange heat with the compressed air flowing around the heat exchange pipe, there is a disadvantage that the heat exchange efficiency is low.

Moreover, in general, the outer cylinder is often exposed to the outside air, and there is a drawback that the air cooled by heat exchange with the heat exchange pipe is also heated by the influence when the outer cylinder is heated.

In addition, the structure of the conventional heat exchanger is difficult to manufacture due to the fact that the tube plate is fixed to the inner wall of the outer tube by welding or the like, and the production process is large and the production time is large.

In addition, since the inner cylinder is made of metal or the like, there is a disadvantage that the cooling energy of the evaporator mounted in the inner cylinder leaks to the outside through the inner cylinder, resulting in poor energy efficiency.

Since the inner tube was sealed with a disc-shaped tube plate, the refrigerant tube of the evaporator had to be bent into the inner tube, and the number of baffle fins attached to the refrigerant tube was required.

Since the heat exchange pipe mounted on the annular tube plate is configured to protrude continuously from the tube plate, the drain generated from the evaporator is transferred to the tube plate by the force of the wind and enters the heat exchange pipe.

This invention is made | formed in view of such a fault of the prior art, and an object of this invention is to provide the internal and external cylinder of the heat exchanger which has a high heat exchange rate and is hardly influenced by external air.

Moreover, an object of this invention is to provide the structure which manufactures a heat exchanger easily, has a high heat exchange efficiency, and which a drain does not enter a heat exchange pipe well, and a manufacturing method.

That is, the inner and outer cylinder spaces arranged to be substantially concentric are divided into two tube plates, and heat exchange pipes are installed between the tube plates to heat exchange the dehumidified air with the high temperature compressed air. In a heat exchanger provided with an air inlet and an air outlet at the same time, the amplitude of the waveform mounted to cover the outer periphery of the inner cylinder in the above space is equal to the interval between the inner cylinder and the outer cylinder, and the length is the average of the outer periphery of the outer cylinder of the inner cylinder and the outer cylinder. And a heat exchange pipe provided inside the corrugated plate. The two end portions of the corrugated plate are perforated alternately in the side portions facing each other and surrounded by the corrugated plate and the inner cylinder. The structure of the heat exchanger in the compressed air dehumidification apparatus which the part was made into the flow path of compressed air, and the said pipe | tube is a tubular pipe | tube with a bottom, Hayeoseo consists of the annular achieves the object of the invention meurosseo Put the inner tube made of a synthetic resin pipe material between the plate bundle.

In forming the heat exchanger, an inner cylinder is inserted until the top of the bottomed tubular tube is brought into contact with the hard plate constituting the outer cylinder, and after insertion the heat exchanger is to coke the outer cylinder on the tube. This object is achieved by the method for producing a group.

In the heat exchanger according to the present invention, the high-temperature compressed air introduced from the air inlet flows in between the outer cylinder of the heat exchanger and the corrugated plate, flows along the concave portion of the corrugated plate, and corrugates from the hole drilled in the end side of the corrugated plate. It flows into the flow path formed by the plate and the inner cylinder.

The introduced air exchanges heat with the dehumidifying cooling air flowing in the heat exchange pipe disposed therein, flows into the adjacent flow path from the hole provided at the other end, and exchanges heat with the dehumidification cooling air flowing in the heat exchange pipe again.

The compressed air which has repeated the above heat exchange is heat-exchanged with the evaporator of the refrigerating cycle through a communication port leading into the inner cylinder installed at one end of the inner cylinder.

The air dehumidified and cooled by heat exchange with the evaporator of the refrigeration cycle flows out from the air outlet after passing through the heat exchange pipe, and is then heated by heat exchange with hot compressed air flowing through the outer circumference of the heat exchange pipe. Therefore, the dehumidified cooling air is not affected by the air in the outer circumference of the outer cylinder.

In addition, since the inner cylinder is made of synthetic resin, leakage of the cooling energy of the evaporator to the outer cylinder is suppressed, and the use of a bottomed tubular tube can extend the refrigerant pipe to the vicinity of the mirror plate, and at the same time, it can be equipped with a large number of baffle fins. Because there is.

Hereinafter, the present invention will be described in detail according to the embodiments shown in the drawings.

1 is an exploded schematic view of the inside of a compressed air dehumidifying apparatus according to the present invention, and reference numeral 10 denotes a cylindrical outer cylinder having an air inlet 11 and an air outlet 12, and in the outer cylinder 10. As shown in FIG. The inner cylinder 14 is arranged so as to be substantially concentric.

In this embodiment, the inner cylinder 14 holds the communication port 13 inside the inner cylinder 14 below.

Reference numeral 16 denotes an evaporator of a refrigeration cycle mounted in the inner cylinder 14, and a heat exchange fin 15 is joined to the outer circumference of the evaporator 16.

Reference numeral 17 is a disc for closing one end of the inner cylinder 14.

The outer circumferential end of the inner cylinder 14 is fitted with tube plates 19 and 20 that are approximately equal to the inner diameter of the outer cylinder 10 for partitioning the space between the inner cylinder 14 and the outer cylinder 10. A plurality of heat exchange pipes 22 are fitted into the holes provided in (19) and (20) to cover the heat exchange pipes 22 so that the amplitudes are the interval between the inner cylinder 14 and the outer cylinder 10. The same corrugated board 24 is attached.

Each end portion of the corrugated plate 24 is partitioned so as to abut on the surfaces of the tube plates 19 and 20 while partitioning a space between the outer circumference of the inner cylinder 14 and the inner circumference of the outer cylinder 10.

In this embodiment, the number of corrugations of the corrugated plate 24 matches the number of the heat exchange pipes 22, and the heat exchange pipes 22 are formed in the convex portion of the corrugated plate between the corrugated plate 24 and the inner cylinder 14. I wear it.

In addition, since the inner circumference of the outer cylinder 10 and the outer circumference of the inner cylinder 14 are completely partitioned by the corrugated plate 24, the air inlet provided in the outer cylinder 10 in the apparatus according to the present embodiment so that compressed air flows. The concave portion of the corrugated plate 24 immediately below (11) is positioned so that the concave portion is an air flow path, and the hole 26 is drilled in the side surface portion of the corrugated plate 24 on the side opposite to the air inlet 11. The convex part of the corrugated plate 24 and the part formed in the inner cylinder 14 are made into the air flow path 27, and in this embodiment, since the communication port 13 is provided in the lower end part of the inner cylinder 14, As shown in FIG. 3, both ends of the corrugated plate 24 are alternately drilled in opposing side portions with respect to the hole 26, and the corrugated plate 24 is surrounded by the inner cylinder 14 as shown in FIG. (27), the side surfaces of the corrugated plate 24 which face each other face each other.

Therefore, in the apparatus of the present embodiment, the air flowing from the air inlet 11 flows into the recessed portion of the corrugated plate 24, but in the other portion, the recessed portion functions only as a communication port.

Next, FIG. 4 shows a second embodiment of the apparatus according to the present invention, and as shown in the figure, the heat exchange pipe 22 is not in a straight line, but in the axial direction of the inner cylinder 14. A plurality of times (No. 2) retracted are used, and the tip ends are fitted with the holes of the tube plates 19 and 20.

In addition, the heat exchange pipe 22 is attached to the adjacent air flow path 27 through the holes 26 which the bent part drilled in the both ends of the said corrugated board 24 mentioned above.

In addition, three heat exchange pipes are used to install the heat exchange pipes 22 at the outer peripheral edge of the inner cylinder 14.

In the case of using the heat exchange pipe bent a plurality of times, the compressed air flowing through the outer circumference of the heat exchange pipe 22 and the cooling air flowing therein may be positioned to face each other as much as possible.

In the above-described configuration, in the apparatus according to the present embodiment, as shown in FIG. 1, the high temperature compressed air introduced from the air inlet 11 flows through the concave portion of the corrugated plate 24 to form the corrugated plate 24. It enters into the convex part through the hole 26 provided in the side part of the heat exchanger, and it cools by heat-exchanging with the cooling air which flows in the heat exchange pipe 22 provided in the convex part.

On the other hand, the cooling air flowing in the heat exchange pipe 22 is heated by heat exchange with the air flowing in the outer circumference thereof, so that the air has a lower relative humidity.

The compressed air heat-exchanged with the heat exchange pipe 22 enters the inner cylinder 14 through the inlet 13 provided in the inner cylinder 14, where it is dehumidified and cooled by exchanging heat with the evaporator 16 of the refrigerating cycle. Is lowered.

The dehumidified and cooled air is heat-exchanged with the high-temperature compressed air through the plurality of heat exchange pipes 22 to rise in temperature, thereby lowering the relative humidity.

Experimental Example

In order to determine the increase in the heat over- exchange rate of the apparatus according to the embodiment of the present invention, the following experiment was performed.

A heat exchanger as shown in FIG. 9 is prepared, and only the heat exchange pipe is disposed without installing the corrugated plate 24 between the inner cylinder 14 and the outer cylinder 10 (comparative example). 24) and the air vapor of each compressed air dehumidifier was made by dropping 30% of the capacity of the evaporator of the refrigerating cycle mounted in the inner cylinder as a comparative example, Example 1, by covering it with 24). Temperature (T1) after primary cooling, air temperature (T2) and air outlet temperature (T3) after passing through the evaporator when compressed air with a pressure of 7 kg / cm2 and a flow rate of 1.0 m3 / min flows into the inlet at a temperature of 35 ° C. As measured, it is as shown in Table 1 below.

TABLE 1

5 is a partially broken cross-sectional view through the inside of the compressed air dehumidifying apparatus according to the third embodiment in which the apparatus according to the first embodiment of the present invention is re-developed, and reference numeral 30 denotes the compressed air inlet 31 and the air outlet. The outer cylinder of the stainless steel material of cylindrical shape which holds the (32), The inner cylinder 34 is provided in the outer cylinder 30 so that it may become substantially concentric.

In this embodiment, the inner cylinder 34 is made of a pipe material having a thickness of about 3 mm made of synthetic resin such as vinyl chloride, and the inner cylinder 34 made of the pipe member has a plurality of holes for fitting heat exchange pipes at the outer peripheral edge thereof. It is inserted into the tube-shaped tubular plate 36 having a perforated bottom and the tube-shaped plate 37 having a plurality of holes for fitting heat exchange pipes at the outer periphery at the outer periphery. It is joined.

These tube plates 36 and 37 are formed by casting an aluminum alloy in the present embodiment. A sealing member 38 having a width of about 7 mm is attached to the concave portion provided on the outer peripheral side thereof. At the apex of the tube 36, the protrusion 40 protrudes in a radial direction, and the horizontal distance from the tip of the protrusion 40 to the seal member of the tube 36 is hermetically sealed. It is designed to be the same as the position to be cocked from the inner wall of the hard plate 42 toward the tube 36 of the outer cylinder 30.

In the present embodiment, the heat exchange pipe 44 is inserted between the tube plates 36 and 37 at the outer circumferential portion of the upper portion of the inner cylinder 34, and the outer circumference of the heat exchange pipe 44 is shown in FIGS. In the corrugated plate 46 as shown in FIG. 7, the heat exchange pipe 44 enters the convex portion and covers the upper half of the inner cylinder 34 so that the concave portion of the corrugated plate is located directly under the air inlet 31. .

As shown in FIG. 7, the corrugated plate 46 drills an air passage hole 48 in the side surface of the convex portion, and air flowing from the air passage hole 48 is opposed to the cooling air flowing in the heat exchange pipe 44. It is configured to exchange heat in the form of.

In addition, a communication port 50 for communicating with the inside of the inner tube 34 on the lower side of the tube 36 is drilled.

In the heat exchange pipe 44 fitted into the tube plates 36 and 37, the air inlet side of the heat exchange pipe 44 protrudes substantially from the tube plate 37 toward the mirror plate 23.

The inner cylinder 34 is equipped with an evaporator of a refrigeration cycle made of a refrigerant pipe 52 and a baffle pin 54 attached thereto. In this embodiment, a tubular tube plate 36 having a bottom is formed in a bowl shape. In addition, since the cold pipe 52 is bent near the hard plate 42, the straight portion of the cold pipe 52 is extended, and as a result, more baffle pins 54 are mounted than before. .

As mentioned above, in the structure demonstrated, manufacture of the heat exchanger of the structure which concerns on this invention is performed in the following procedures.

a, The hard plate 42 is welded to one end of the cylindrical stainless outer cylinder 30.

b. The inner cylinder 34 made of synthetic resin pipe material such as vinyl chloride is inserted into the bowl-shaped tube plate 36 and the annular tube plate 37 having the seal member 38 on the outer circumferential side thereof, and one of them is epoxy. Secure it to the tube with resin adhesive.

c. The heat exchange pipe 440 is inserted into the circular hole provided near the outer peripheral edges of the tube plates 36 and 37 so that the air inlet side protrudes to some extent, and the diameter of the heat exchange pipe 44 is fixed.

d. After the inner cylinder 34 is completed, the inner cylinder 34 is inserted until the convex portion of the bowl-shaped tube 36 contacts the hard plate 42 of the outer cylinder 30 until a metallic sound is produced. The inner and outer cylinders are fixed by caulking the outer cylinder 30 on the sealing material 38 provided on the outer peripheral side of 36) and (37).

e. Insert the evaporator of the refrigeration cycle into the inner cylinder 34 and fix it.

f. The outer cylinder 3 of the other side is sealed by welding with a hard plate.

Therefore, this manufacturing operation requires a relatively simple welding process of the outer cylinder 30 and the light plates 42 and 43, but there is no need for welding the tube 36, 37 and the outer cylinder 30, which were previously recognized as difficult. In addition, positioning of the caulking position from the outer cylinder 30 is easy because the distal end portion of the used cylindrical tubular plate 36 is positioned at the position where it is in contact with the hard plate 42.

As described above, in the heat exchanger of the related structure of the third embodiment, the compressed air entering from the air inlet 31 flows through the concave portion of the corrugated plate 46 and passes through the convex portion 48 of the corrugated plate 46. 2) flows into the convex portions of both side wave plates 46, and is pre-cooled by heat exchange with the cooling air flowing in the heat exchange pipe 44 (at this time, the cooling air flowing in the heat exchange pipe 44 and its outer periphery). Air is the countercurrent). The air that abuts on the tube plate 37 then flows from the through hole 48 in the corrugated plate 46 back to the concave portion of the corrugated plate, flows in the direction of the tube plate 36 and flows into the heat exchange pipe 44. Heat exchange with the flowing cooling air.

The compressed air precooled as mentioned above enters into the inner cylinder 34 from the communication hole 50 located below the inner cylinder 34 via the corrugated plate recess, the air cylinder hole 48, and the inner cylinder 34 Heat exchange with the evaporator settled in the) and the cooling and dehumidification.

The dehumidified and cooled air flows in the direction of the hard plate 43 and enters the heat exchange pipe 44 protruding from the tube plate 37.

The dehumidified and cooled air flowing through the heat exchange pipe 44 is also heat exchanged with the air flowing around the heat exchange pipe 44 to become hot and again has low relative humidity to be discharged from the air outlet 32.

In addition, in the present embodiment, a part of the pipe bundle 36 is formed in a bowl shape, but is not limited to this, but may be configured in a bottomed tubular shape which is smaller than the inner diameter of the outer cylinder or in an annular shape. The tip may be configured to contact the hard plate 42.

Moreover, when fitting the pipe material which comprises the pipe | tube 36, 37 and the inner cylinder 34, it adhere | attached one side and comprised so that the other side might not adhere | attached, In order to buffer the deviation caused by the difference in thermal expansion coefficient due to the material, it is preferable to secure the fitting part 1 _cm or more.

As described above, the apparatus according to the present invention is configured to cover the heat exchange pipe, which is a precooling means of the compressed air, with a corrugated plate, so that the heat exchange efficiency can be increased without being influenced by outside air.

Moreover, since the heat exchange efficiency is good, it can cope with the low ability of the evaporator of the refrigerating cycle used for secondary cooling.

The structure of the heat exchanger and the manufacturing method thereof according to the present invention have fewer welding steps than the conventional ones, making production easier.

Unlike the conventional metal, the inner cylinder is made of synthetic resin, so that the loss of cooling energy in the inner cylinder can be reduced and the weight can be reduced.

In addition, since the tube plate is formed in a bowl shape, since the refrigerant pipe and baffle fin of the evaporator mounted therein can be installed on the hard plate side more than before, the heat exchange efficiency can be improved.

Claims (6)

The space between the inner cylinder 14 and the outer cylinder 10 arranged to be substantially concentric is divided into two tube plates 19 and 20, and a heat exchange pipe 22 is installed between the tube plates to dehumidify and cool. A heat exchanger configured to heat-exchange air and high-temperature compressed air, wherein the air inlet 11 and the air outlet 12 are provided in the outer cylinder 10, and are mounted to cover the outer periphery of the inner cylinder in the space. The corrugated plate 24 having a wave shape, the amplitude of which is equal to the interval between the inner cylinder outer cylinder, and whose length is approximately equal to the average of the average of the inner cylinder 14 and the outer cylinder 10, and the inner side of the corrugated plate 24 described above. The heat exchange pipe 22 is disposed, and holes 26 are alternately drilled in opposite side portions of both end portions of the corrugated plate 24 so as to be surrounded by the corrugated plate 24 and the inner cylinder. In the heat exchanger of the compressed air dehumidification apparatus characterized in that And out through the structure. 2. The inner cylinder 34 is made of a pipe material made of synthetic resin such as vinyl chloride, and a pipe plate for partitioning the space between the inner cylinder 34 and the outer cylinder 30 is mounted on the outer circumferential side thereof. It consists of a tubular tubular plate 36 having a bottom and an annular tubular plate 37, and an inner cylinder 34 is inserted into the tubular plate, and between the holes drilled in the outer peripheral edge of the tubular plate. An internal and external cylinder structure in a heat exchanger of a compressed air dehumidifier, characterized in that a heat exchange pipe is provided in the heat exchanger. The inner and outer cylinders of the heat exchanger of the compressed air dehumidifying apparatus according to claim 2, wherein the inner cylinder is attached to the pipe plate by means of an adhesive, and the other is configured only by fitting the pipe material. rescue. 3. The compressed air dehumidification according to claim 2, characterized in that the heat exchange pipe (44) mounted on the outer circumferential edge of the annular tube plate (37) protrudes toward the light plate (ol) 42 of the outer cylinder (30). Internal and external cylinder structure in the heat exchanger of the device. 3. The bowl according to claim 2, wherein the bottom is formed in a bowl shape having projections at the apex of the tubular conduit plate 36, and when the projections and the hard plate 42 of the outer cylinder 30 come into contact with each other, An inner and outer cylinder structure in a heat exchanger of a compressed air dehumidifier, characterized in that the coking positions of the seal member (38) of the tube plate and the outer cylinder (30) coincide with each other. Between the cylindrical tubular plate 36 and the annular tubular plate 37 which have a bottom which holds the sealing material 38 on the outer circumferential side of the cylindrical plate 42 at one end of the cylindrical outer cylinder 30. Insert the inner cylinder 34 made of synthetic resin pipe such as vinyl chloride, fix one side to the tube with adhesive, and heat exchange the pipe in the circular hole provided near the outer peripheral edges of the tube 36 and 37. When the 44 is inserted and then the heat exchange pipe 44 is enlarged and fixed, the apex of the bottomed tubular tube attached to the inner cylinder 34 abuts against the hard plate 42 in the outer cylinder 30. And the inner and outer cylinders are fixed by caulking the outer cylinder 30 on the seal member installed on the outer circumferential sides of the tube plates 36 and 37 after inserting it into the inner tube 34. Insertion and fixation, and consists of a process of sealing the hard plate by welding to the outer cylinder 30 to the other side A method of manufacturing an inner and outer cylinder in a heat exchanger of a compressed air dehumidifier, characterized in that it is made.