JPH0245671Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat exchanger suitable for use in a compressed gas dehumidification device for supplying compressed gas to air equipment and the like.

Prior Art Conventionally, this type of heat exchanger has a compressed air inlet 23 and a compressed air outlet 24, as shown in FIG.
A donut-shaped buttful plate 21 and a disc-shaped buttful plate 22 are placed in a pressure-resistant container 25 having
are arranged alternately, and the cooling pipes 26 are provided so as to penetrate therethrough, thereby fixing the baffle plate. The doughnut-shaped buttful plate 21 is in contact with the inner wall of the container 25 at its peripheral edge, and has a ventilation opening 21a near its center for air to pass through. has a smaller diameter than the doughnut-shaped buff-full plate, and the air entering from the inlet 23 passes through the ventilation opening 21a and then passes through the gap between the periphery of the disc-shaped buff-full plate 22 and the inner wall surface of the container 25. , and again passes through the ventilation opening of the next baffle plate, repeating the above steps one after another until reaching the compressed air outlet 24. During this time, the high-temperature compressed air is cooled by exchanging heat with the fluid in the cooling pipe 26, but at the same time, the high-temperature compressed air collides with the baffle plates 21 and 22 and is repeatedly collected and separated, resulting in a pressure loss. Therefore, the spacing between these buffle plates is generally set to a certain spacing that provides the best balance between heat exchange efficiency and pressure loss. Under such conditions, it has been difficult to downsize the heat exchanger, in other words, to increase the heat exchange efficiency without causing pressure loss.

Structure of the invention When the inventor of the present invention was improving a heat exchanger with the goal of downsizing compressed air dehumidification equipment, he added a donut-shaped heat exchanger plate between the conventional buttful plates. They found that by interposing the heat exchanger, there was little pressure loss and the heat exchange rate increased, and the present invention was completed.

The gist of the present invention is to provide a compressed gas flow path consisting of a cylindrical container having an inlet and an outlet for the compressed air at both ends, with a width of 120% of the effective cross-sectional area of the inlet and outlet of the compressed air.
A doughnut-shaped buttful plate having a ventilation opening with an area of the above area and an inner wall of a cylindrical container having a smaller diameter than the buttful plate are sized so as to form a gap with an area approximately equal to the ventilation opening. Disc-shaped buttful plates having a fixed diameter are arranged alternately, and between these two buttful plates, the donut-shaped part has a diameter that is approximately the same as or slightly smaller than the disc-shaped buttful plate, and is located near the center. A donut-shaped heat exchanger plate having ventilation openings having an area of 15 to 25% of the area of the buttful plates is provided, and furthermore, the mutual spacing of the donut-shaped buttful plates is such that the distance between the donut-shaped buttful plates is from the inlet side to the outlet side of the compressed gas. By providing a conduit parallel to the axial direction of the cylindrical container passing through these buttful plates and heat transfer plates, the buffful plates and heat transfer plates are The heat exchanger is fixed, and is configured such that a fluid to be heat exchanged with a compressed gas flowing in a cylindrical container flows through the pipe line. Hereinafter, a detailed explanation will be given based on one embodiment.

In FIG. 1, the heat exchanger according to the present invention has a cylindrical container 4 having an inlet 5 and an outlet 6 for compressed air at both ends, and an inner wall surface 4a of the cylindrical container 4 forming an air flow path at a peripheral edge 1a. The doughnut-shaped buttful plates 1, 1, ... whose diameters are determined so that they touch each other and have a ventilation opening 1b near the center are arranged so that the interval becomes narrower from the air inlet 5 to the air outlet 6. Disc-shaped buff full plates 2, 2, . . ., each having a slightly smaller diameter, are arranged between the buff full plates 1, 1, . Further, donut-shaped heat exchanger plates 3, 3... having approximately the same outer diameter as the disc-shaped buffful plates 2,... are interposed between these buffful plates 1, 2 at regular pitch intervals. equipped. These bulk plates 1,..., 2,... and heat exchanger plates 3,
3,... are arranged in parallel to the axial direction of the cylindrical container 4 while penetrating them, and are arranged in a meandering manner by making a U-turn at the end of the container, so that their mutual positions are adjusted. Fixed. Both ends of the pipe line 7 are opened outside the cylindrical container 4,
An inlet 8 and an outlet 9 are respectively formed for the fluid to be heat exchanged.

In the above, the ventilation opening 1b of the full plate 1 has an effective cross-sectional area of the air inlet 5 or the air outlet 6.
The gap 2a, which has an area of 120% or more and therefore is formed between the buff-full plate 2 and the inner wall of the cylindrical container 4, is also approximately the same. Ventilation opening 3a provided near the center of donut-shaped heat exchanger plate 3
When used as a compressed air dehumidifier, the area of
15-25% of the area of donut-shaped buttful plate 1
The purpose can be achieved by defining it within a range of degrees. If the aperture ratio is less than 15%, the pressure loss will be large, causing problems as a dehumidifying and drying device for compressed air. Moreover, if it exceeds 25%, the heat exchange efficiency will decrease, making it impossible to achieve the purpose.

The heat exchanger of the present application exchanges heat between the gas flowing between the buffer plates 1 and 2 and the heat exchanger plate 3 and the gas flowing through the pipe line 7, but when used as a heat exchanger in a compressed air dehumidifier. In this case, the fluid flowing through the pipe 7 is a refrigerant of the refrigeration cycle,
Cooling water, brine, etc. are listed, and when used as a pre-cooling device for exchanging heat between the high temperature compressed air from the air compressor and the cooled moist compressed air after passing through the main cooling dehumidifier, The compressed air after cooling and dehumidification flows through the pipe line 7 and is reheated, and at the same time, the high temperature compressed air flowing inside the cylindrical container 4 is precooled. Naturally, the diameter of the pipe and the piping differ depending on the type of fluid. For example, when used as a pre-cooling device for the compressed air, chambers are provided at both ends of the cylindrical container, and these chambers are communicated. A plurality of pipes may be provided passing through the baffle plate and the heat exchanger plate, and one of the two chambers may be provided with an inlet for cooling and dehumidified compressed air, and the other may be provided with an outlet.

Effects The heat exchanger of the present application has a donut-shaped heat exchanger plate interposed between a conventional donut-shaped buttful plate and a disc-shaped buttful plate with a slightly smaller diameter, and has both types of buttful plates. and the heat exchanger plate, the mutual area ratio is set within the above-mentioned certain range,
Furthermore, by configuring the installation pitch of the doughnut-shaped buttful plates to be gradually narrowed toward the exit direction, gas, especially compressed air, flowing between the buttful plates and the heat exchanger plates is repeatedly collected and separated. Heat exchange efficiency can be improved without causing too much pressure loss, so
It has the advantage of being more compact than conventional heat exchangers of the same capacity.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention. 2A, B, and C are front views of the baffle plate and heat exchanger plate of FIG. 1, respectively. Figure 3 shows
FIG. 2 is an explanatory diagram showing a conventional technique. Figure 4 A and B are
FIG. 4 is a front view of the buttful plate of FIG. 3, respectively;

Claims (1)

[Claims for Utility Model Registration] (1) In a compressed gas flow path having an inlet and an outlet for compressed gas near both ends of a cylindrical container, the cylindrical container is in contact with the inner wall surface of the cylindrical container at the periphery, and the A doughnut-shaped buttful plate having a ventilation opening having an area of 120% or more of the effective cross-sectional area of the inlet or outlet, and an inner wall of the cylindrical container having a smaller diameter than the donut-shaped buttful plate, with an area approximately equal to the ventilation opening. Disc-shaped buttful plates whose diameter is determined so as to form a gap are arranged alternately, and between these two buttful plates, there is a disc-shaped buffful plate having approximately the same diameter as that of the disc-shaped buffful plate or slightly more. It has a small diameter and has an area of 15 to 25 of the area of the doughnut-shaped buttful plate near the center.
A donut-shaped heat exchanger plate having ventilation openings with an area of 1. A heat exchanger for compressed gas, characterized in that a plate and a heat transfer plate are fixed, and a fluid to be heat exchanged with compressed gas in a cylindrical container flows through the pipe line. (2) The mutual spacing of the doughnut-shaped buttful plates is
2. The heat exchanger according to claim 1, wherein the heat exchanger is arranged so as to become gradually narrower from the gas inlet side to the outlet side.