JP3948221B2 - Heat exchanger for air compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a small and medium capacity air compressor used for a power air source or the like in a factory, and more particularly to a heat exchanger provided in the compressor.
[0002]
[Prior art]
There are screw-type compressors and small turbo compressors as small and medium-capacity air compressors with discharge pressures of about 0.7 MPa in gauge pressure and outputs of less than 100 kW to several hundred kW, and they are used as power air sources in factories. . Examples of such an air compressor are described in JP-A-8-105386 and JP-A-2000-120585. In these publications, a laminated heat exchanger or a fin tube heat exchanger is used to cool the compressed air generated by a medium- and small-capacity turbo compressor.
[0003]
And in JP-A-8-105386, in order for the seal part of the gas cooler to have both rigidity and sealing properties, a gas cooler for cooling the compressed gas is inserted into the cooler shell through which the compressed gas is circulated with a predetermined gap, A seal portion that seals the gap and partitions the inside of the cooler shell into a high temperature side and a low temperature side is formed on the outer periphery of the gas cooler. The seal portion protrudes from the outer peripheral portion of the gas cooler and elastically contacts the inner wall of the cooler shell. Japanese Patent Application Laid-Open No. 2000-120585 discloses a pressure vessel having a pair of rails having a recess at one end in order to improve the seal reliability and maintainability, and then fits into the recess after running on the rail. It is described that the nest accommodated in the pressure vessel has a roller to be inserted.
[0004]
[Problems to be solved by the invention]
In each of the sealing methods described in the above prior art, the sealing performance is surely improved. However, since a complicated configuration is required, processing is complicated. In addition, when the nest is stored in the casing, the elastic seal becomes a resistance, and the assembling work is increased. Moreover, it was difficult to completely prevent leakage.
[0005]
The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to prevent a reduction in heat exchange efficiency due to leakage between the cooler nest and the casing with a simple structure. Another object of the present invention is to realize a high-performance heat exchanger capable of cooling a high-temperature fluid. The present invention aims to realize at least one of these objects.
[0006]
[Means for Solving the Problems]
In order to achieve the above object , the present invention has a heat exchanger nest in which a plurality of low temperature chambers through which a low temperature fluid flows and a plurality of high temperature chambers through which a high temperature fluid flows are alternately stacked via partition plates, A cross section provided at the bottom of the left and right side surfaces of the heat exchanger nest, wherein the flow direction of the low temperature fluid in the low greenhouse and the flow direction of the high temperature fluid in the high temperature chamber are substantially orthogonal, both ends in the stacking direction are low temperature chambers A U-shaped fixing member, a container that accommodates the heat exchanger nest and has protrusions formed on the left and right inner wall surfaces corresponding to the fixing member, and is placed on the upper surface of the protrusion and formed on the fixing member An elastically deformable seal member that is held in the U-shaped groove, and is cooled by exchanging heat in the space inside the container through which the high-temperature fluid flows and in the heat exchanger nest. The low-temperature fluid flows Partition the space, in which the sealing member is disposed in said cold fluid side.
[0007]
Furthermore, in the above, it is desirable that the low temperature fluid is cooling water and the high temperature fluid is compressed air.
[0008]
Furthermore, it is desirable that the screw compressor is provided with the heat exchanger for an air compressor described above.
[0009]
Further, in the above, it is preferable that a compressive load is applied to the seal member by the mass of the heat exchanger nest.
[0010]
Furthermore, in the above-described structure, it is preferable that the sealing member has a notch formed on the fixing member side and the protrusion side is tapered.
Moreover, it is desirable that at least one of ethylene propylene rubber, acrylic rubber, silicone rubber, and fluoro rubber is the main component of the sealing member.
Furthermore, the sealing member is preferably a gas tube seal in which a polymer material is formed in a tube shape and gas is sealed or injected therein.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, some embodiments of the present invention will be described with reference to the drawings. First, knowledge based on the preliminary test according to the present invention will be described. In the heat exchanger according to the present invention, two kinds of working fluids are formed with orthogonal flow paths across the partition plate, and two different kinds of working fluids circulate through the orthogonal flow paths. When the working fluid flows through the orthogonal flow paths, heat is transferred from the high temperature side high temperature chamber to the low temperature side low temperature chamber through the partition plate. Thereby, the fluid on the high temperature side is cooled. A high greenhouse and a low temperature room form a pair, and the pair is laminated in a plurality of layers to form a heat exchanger called a nest. An example of such a heat exchanger is described in page 261 of Heat Transfer Engineering Material (4th revised edition) published by the Japan Society of Mechanical Engineers. According to this publication, this type of heat exchanger is classified as a compact heat exchanger. In a compact heat exchanger, when cooling water is used for the low temperature chamber fluid and compressed air is used for the high temperature chamber fluid, the heat transfer coefficient on the high temperature chamber side is small, so corrugated fins are used, or slits called louvers are provided on the corrugated fins. It is intended to increase the heat transfer area and improve the heat transfer coefficient. It is easily considered to use a compact heat exchanger for the compressor by taking advantage of this small size and compactness. However, since the difference in heat transfer coefficient is large in the heat exchanger for an air compressor as described above, sufficient performance cannot be ensured by simply using a compact heat exchanger for the air compressor. Therefore, in consideration of the characteristics and economy of the compact heat exchanger, the present invention uses a nest in which the number of high-temperature chambers is larger than that of low-temperature chambers, as will be described in detail below.
[0012]
By the way, in order to increase the number of high temperature chambers in the nest to be larger than the number of low temperature chambers, a nest of four low temperature chambers is manufactured with five high temperature chambers, and the cooling performance is measured. There wasn't. Therefore, the temperature distribution of the fluid in the high-temperature chamber (hereinafter referred to as the gas chamber) at both ends, and the gas in the gas chamber sandwiched between the cold chambers (hereinafter referred to as the water chamber) on both sides in the middle The outlet temperature was measured. The result will be described with reference to FIGS. 16 and 17 are a plan view and a side view, respectively, of a corrugated fin heat exchanger nest designed as a cooler for an air compressor.
[0013]
The gas chambers 51 are arranged on both sides, and the total of the gas chambers 51 is five rows and the water chambers 52 are four rows. The heat transfer area on the air side, which has a lower thermal conductivity than water, is increased to balance the amount of heat passing between the water side and the air side. The gas flow direction 58 is from the upper side to the lower side in the figure, and the cooling water 59 enters from the lower side of the front side tube plate 53, changes its direction in the rear side water chamber case 54, and comes out from the upper side of the front side tube plate 53. That is, the two types of working fluids are orthogonal to each other with the partition plate 55 interposed therebetween. Heat passes through the partition plate 55 and is transferred from the high temperature chamber side to the low temperature chamber side. The high-temperature fluid flows from the upper side to the lower side, and the cooling water enters from the lower side of the front tube plate 53 so as to be orthogonal to the flow, then changes the direction in the rear water chamber case 54 and flows out from the upper side of the front side tube plate. To do. Corrugated fins are provided in the gas chamber, and the heat transfer area is increased by the fins. The heat transfer area is increased by fins to cover the portion having a lower thermal conductivity than water.
[0014]
Although not shown, if the nest used in the present embodiment is accommodated and attached to the casing, a heat exchanger for the air compressor is formed. At this time, the gap generated between the nest and the casing is sealed at the periphery on the nest entrance side using the seal plates 46 and 47. Using this heat exchanger, a cooling performance test of compressed hot air was performed. FIG. 18 is a cross-sectional view taken along the line AA in FIGS. 16 and 17 and is a cross-sectional view at a position of a quarter length of the nest length. FIG. 11 also shows the measurement position of the gas temperature. The hot air that has flowed in from above flows downward while being cooled in the gas chamber 51. A gap between the nest and the casing wall 65 is sealed with a seal plate 56. From this gap, it was found that a slight amount of air leaks and flows to the nest outlet side at a high temperature. Temperature sensors 61 were provided at the outlets of the gas chambers at both ends and the intermediate gas chamber, and the gas temperature was measured. The temperature sensor 60 was provided to measure the inlet temperature. FIG. 19 shows a cross section when the gas chamber inlets at both ends of the nest shown in FIGS. FIG. 19 is a cross-sectional view taken along arrows AA in FIGS. A temperature sensor that measures the outlet temperature of the gas chamber was placed in three rows near the center.
[0015]
The temperature measurement results in these two cases are shown in FIG. In the symbols in FIG. 20, the first number indicates the test order, the next number indicates the measured gas chamber position, and the last character indicates the cross-sectional position. For example, in the case of 1-3A, the first 1 is the test number of 5 rows of gas rows and 4 rows of water chambers, 3 means the third row of gas chambers, and A means the AA cross-sectional position. When the first numerical value is 2, it is the result of the test which sealed the gas chamber of both ends. As is apparent from this figure, the outlet temperatures of the gas chambers at both ends are significantly higher than the outlet temperature of the central gas chamber. And even if the gas chambers at both ends are sealed, the outlet temperature of the gas chamber from the center hardly changes. Of course, in both tests, the amount of inlet heat is matched. As a result, even when the heat transfer area was 3/5, the cooling performance was good when there were no gas chambers at both ends. That is, in the outer gas chamber, this corresponds to an increase in the gap between the casing and the nest. Since the heat exchanger of the present embodiment is a heat exchanger in which the nest is accommodated in the casing, the casing is heated by the high-temperature fluid. Since there is a leakage of high-temperature fluid, it is estimated that the cooling performance is reduced as a result of heat input from the outside to the gas chamber fluid at both ends of the nest.
[0016]
Several embodiments of the present invention based on the above findings will be described with reference to FIGS. 1 to 3 are a front view, a top view, and a side view of a two-stage screw compressor provided with a heat exchanger according to the present invention, and is a view that shows a package that is removed. 4 and 5 are cross-sectional views showing the structure of the casing portion in which the heat exchanger is accommodated.
[0017]
The screw compressor in the present embodiment is a two-stage compressor including a low-pressure stage (first stage) compressor and a high-pressure stage (two-stage) compressor. The handling fluid is air, and the discharge pressure is about 0.7 to 1.0 MPa in terms of gauge pressure. This compressor is used, for example, as a factory air source for general industries. The configuration of the compressor will be described in detail below. The low-pressure stage compressor 2 and the high-pressure stage compressor 3 are attached to the speed increaser casing 5, and the rotor included in each stage of the compressor is rotated by the electric motor 4. The air passages for the first stage suction, the first stage discharge, the second stage suction, and the second stage discharge are formed by dividing the inside of the gearbox casing 5 by a partition wall. The high-temperature air pressurized by the compressors at each stage passes through the respective passages and is cooled by an intercooler and an aftercooler described later. Cooling water is supplied to these coolers via a cooling water pipe 21. The cooling water is first led to the water chamber cover 20, then led to the nest, and then discharged from the outlet pipe 22. The screw compressor has attached devices such as an oil pump 15, an oil cooler 16, a suction filter 11, and a capacity adjustment valve 10.
[0018]
FIG. 4 shows the intercooler inlet and the state of accommodation and mounting of the cooler. In FIG. 4, the compression stage is omitted. The high-temperature air pressurized by the first-stage compressor enters the intercooler chamber 33 through the casing inner passage 36. FIG. 5 shows the outlet part of the intercooler and the inlet part of the aftercooler. Also in FIG. 5, the compression stage is omitted. The air cooled by the intercooler passes through the passage 37 and is sucked into the two-stage compressor. The high-temperature air pressurized by the two-stage compressor flows into the aftercooler chamber 34 through the casing passage 38. In this embodiment, the gap formed between the casing and the cooler nest is sealed near the upper entrance.
[0019]
6 and 7 show the nest structure. FIG. 6 is a plan view of the nest as seen from the gas inflow direction. FIG. 7 is a side view of FIG. In this embodiment, the high-temperature fluid flows from the top to the bottom, and the cooling water enters from the bottom so as to be orthogonal to the flow, and flows out from the top. The nest of this embodiment has four rows of gas chambers 41 and five rows of water chambers 42. Water chambers 42 are disposed on both ends. On the other hand, the gas chamber 41 has water chambers on both sides. In FIG. 7, the gas 48 flows from the upper side to the lower side, and the cooling water 49 enters from the lower side of the front side tube plate 43, changes its direction in the rear side water chamber case 44, and then flows out from the upper side of the front side tube plate. Two types of working fluids flow orthogonally across the partition plate 45. Heat is transferred from the high temperature chamber side to the low temperature chamber side through the partition plate. Corrugated fins are formed in the gas chamber. The gap between the nest and the casing is sealed at the periphery of the nest entrance side using seal plates 46 and 47. In addition, you may make it seal the periphery part of a nest exit.
[0020]
FIG. 8 shows a BB cross section of the cooler nest shown in FIGS. 6 and 7. Water chambers 42 are arranged at both ends, and all gas chambers 41 are sandwiched between water chambers. When the cooler nest of the present embodiment is used, the high-temperature fluid passes through the gas chamber sandwiched between the water chambers, so that it is sufficiently cooled. Further, even if the sealing plate 46 seals between the casing and the nest, complete sealing is difficult. However, the slightly leaked high-temperature fluid does not heat the fluid flowing in the internal gas chamber. Since the leaked hot fluid is cooled by the outside cooling water, the leaked gas can be efficiently cooled.
[0021]
Another embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the case where the intercooler and the aftercooler are configured as a single unit is taken up, but of course, a plurality of heat exchangers may be integrated as in the above embodiment. A corrugated fin-type heat exchanger nest 31 is accommodated in a container 30 constituting an aftercooler or an intercooler. Fixing members 88 having a U-shaped cross section are provided at the bottoms of the left and right side surfaces of the heat exchanger nest 31. Projections 72 are formed on the left and right inner wall surfaces of the container 30 corresponding to the fixing member 88.
[0022]
The seal member 71 is placed on the upper surface of the protrusion 72, and this seal member 71 is held in the groove 87 formed by the fixing member 88, whereby the space inside the container 30 and the heat exchanger nest 31 And partitioning into a space in which the low-temperature air 50 cooled by heat exchange is circulated. At that time, the heat exchanger nest 31 and the seal member 71 are kept airtight by bringing the inner wall surface 75 of the fixing member 88 into close contact with the outer surface 74 of the seal member 71. The seal member 71 is a sufficiently elastically deformable material such as rubber. The shape of the sealing member 71 is such that a notch is formed on the fixing member 88 side and the protruding side 72 is tapered in consideration of the adhesion to the protrusion 72 and the adhesion to the fixing member 88.
[0023]
In the present embodiment configured as described above, since the seal member 71 is disposed on the low temperature air 50 side, thermal deterioration of the seal member 71 made of rubber or the like can be reduced. Since the seal member 71 is disposed below the heat exchanger nest 31, the seal member 71 is compressed and deformed by the weight of the heat exchanger nest 31, and a surface pressure can be reliably applied to the seal surface.
[0024]
Since the seal member 71 is made of an elastically deformable material such as rubber, even if the projection 72 of the container 30 has a large uneven surface such as a casting surface, it can be reliably sealed without generating a gap. Further, since the inner wall surface 75 of the fixing member 88 and the outer surface 26 of the seal member 71 are brought into close contact with each other, it is possible to prevent the occurrence of a gap that may occur when the heat exchanger nest 31 is fixed.
[0025]
Here, the thickness h (see FIG. 9) of the seal member 71 is such that the surface 73 on which the seal member 71 comes into contact with the protrusion 72 from the bottom surface 8 of the tube plate 89 and the fixing member 88 which is the lowermost surface of the heat exchanger nest 31. Set to be downward. Accordingly, when the heat exchanger nest 31 is mounted in the container 30, the seal member 71 can be compressed and deformed by the weight of the heat exchanger nest 31. The contact surface 73 of the seal member 71 with respect to the protrusion 72 and the outer surface 74 that is the contact surface with the fixing member 88 have a smaller area than the cross-sectional area of the seal member 71. The rigidity at the contact surface can be reduced. Thereby, the outer surface 74 of the seal member 71 can be easily brought into contact with the inner wall surface 75 of the fixing member 88.
[0026]
By the way, the inlet air temperature of a heat exchanger such as an intercooler or an aftercooler used in a screw compressor reaches about 200 ° C. and a pressure of about 0.1 MPa. As a sealing material used at such a high temperature, it is desirable to use ethylene-propylene rubber, acrylic rubber, silicone rubber, or fluorine rubber having high heat resistance.
[0027]
A modification of the embodiment shown in FIG. 9 is shown in FIG. FIG. 11 is a three-view diagram illustrating a front view, a top view, and a side sectional view. The gas tube seal 76 is formed by forming a polymer material rich in heat resistance and stretchability into a tube shape and sealing or injecting a gas such as air inside. By using a tube-type seal, the amount of elastic deformation can be increased. In particular, if a gas sealing port 77 and a pipe for sealing gas into the gas sealing port 77 from the outside of the container 30 are provided, the gas is sealed in the gas tube seal 76 after the heat exchanger nest 31 is fixed to the container 30. A reliable seal can be obtained simply by applying pressure. Further, when the heat exchanger nest 31 is taken out from the container 30, the heat exchanger nest 31 can be taken out from the container 30 simply by removing the gas from the tube 76. As a material for the tube, polyacetal, fluorine resin, etc. having high heat resistance and stretchability are preferable.
[0028]
Another modification of the present invention is shown in FIG. In FIG. 6A, the weight of the seal member is loaded on the seal member 71 a placed on the protrusion 72 through a stopper 78 provided on the bottom of the heat exchanger nest 31. Then, the stopper plate 78 and the protrusion 72 are clamped by using a release stopper 79. As another clamping method, as shown in FIG. 2B, a seal member 71a is sandwiched between the heat exchanger fixing plate 80 and the protrusion 72 provided at the lowermost side of the heat exchanger nest 31, and the protrusion 72 and There is a method of screwing the bolt 33 penetrating the seal member 71 a to the heat exchanger fixing plate 80. By any of these methods, the sealing member can be elastically deformed to be surely sealed. In addition, if the seal member is fixed to the heat exchanger nest with an adhesive, gas leakage between the heat exchanger nest and the seal member can be prevented more reliably.
[0029]
Yet another modification of the present invention is shown in FIG. A thin plate 92 is attached to the bottom surface of the heat exchanger nest 31 so as to extend in the left-right direction of the heat exchanger nest 31, and a U-shaped groove plate 91 is attached to the extended portion using a bolt 90. The seal member 71 is held in the groove 87 of the groove plate 91. According to this modification, even if the fixing bolt 90 is loosened and dropped while the heat exchanger is operating, the receiving surface 93 is formed on the seal member 71, so the gas flow path of the dropped bolt 90 Can be prevented from flowing.
[0030]
14 and 15 are partial sectional perspective views of heat exchangers using the seal members 71 and 71a shown in the above-described embodiments and modifications. FIG. 15 shows the bottom side on the left side and the right side on the bottom side for convenience of display. The high-temperature air 48 discharged from the compressor or the like is sucked from the suction port 28, exchanges heat with cooling water in the heat exchanger nest 31 to become low-temperature air 50, and is discharged to the outside from the discharge port 29. A water chamber 63 is provided on the inlet / outlet side of the cooling water. The heat exchanger nest 31 has a water chamber (row) and a gas chamber (row) as described in detail in the above embodiment, and they have corrugated fins 26 and 27. In FIG. 15, there is a tube plate 27 between the chambers, and an outer bar 29 is provided on the tube plate side.
According to each of the embodiments and modifications described above, the heat exchanger nest can be easily attached to and detached from the container of the heat exchanger, and since the sealing can be performed reliably, a highly reliable and efficient heat exchanger can be obtained. Further, it is only necessary to remove the cover at the time of cleaning inspection, and maintenance is improved. Furthermore, if the temperature of the working fluid at the outlet of the heat exchanger is lowered, the compressor power can be reduced, which can contribute to energy saving.
[0031]
【The invention's effect】
As described above in detail, according to the present invention, in the compact heat exchanger, the low temperature chamber is increased by one room (one row) than the high temperature chamber, and the low temperature chambers are arranged at both ends. A heat exchanger can be obtained. Furthermore, the sealing performance inside the heat exchanger can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of a screw compressor having a heat exchanger according to the present invention.
FIG. 2 is a plan view of the screw compressor shown in FIG.
3 is a side view of the screw compressor shown in FIG. 1. FIG.
4 is a cross-sectional view of the casing of the screw compressor shown in FIG.
FIG. 5 is another cross-sectional view of the casing shown in FIG. 4;
FIG. 6 is a plan view of one embodiment of a heat exchanger according to the present invention.
7 is a side view of the heat exchanger shown in FIG. 6. FIG.
FIG. 8 is a cross-sectional view of another embodiment of the heat exchanger according to the present invention.
FIG. 9 is a partial cross-sectional side view of still another embodiment of the heat exchanger according to the present invention.
10 is a front view of the heat exchanger shown in FIG.
FIG. 11 is a three-side view of another embodiment of the sealing member according to the present invention.
FIG. 12 is a cross-sectional view of a modified example of the seal member according to the present invention.
FIG. 13 is a cross-sectional view of still another modification of the seal member according to the present invention.
FIG. 14 is a diagram for explaining the flow of air flowing in the heat exchanger according to the present invention.
FIG. 15 is a diagram illustrating details of a water chamber and a gas chamber according to the present invention.
FIG. 16 is a plan view of the heat exchanger used in the preliminary test.
17 is a side view of the heat exchanger shown in FIG.
18 is a cross-sectional view taken along line AA in FIGS. 16 and 17. FIG.
FIG. 19 is a view for explaining a state in which the outer gas chamber is sealed along the AA cross section of FIGS. 16 and 17;
FIG. 20 is a diagram for explaining cooling performance in a preliminary test.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Screw compressor, 2 ... 1 stage compressor, 3 ... 2 stage compressor, 4 ... Electric motor, 5 ... Booster casing, 6 ... Base, 7 ... -Soundproof cover, 8 ... Control panel, 9 ... Start-up panel, 10 ... Capacity adjustment valve, 11, 11a ... Suction duct, Suction filter, 12, 13 ... Discharge piping, 14 ... -Safety valve, 15 ... Oil pump, 16 ... Oil cooler, 17 ... Oil filter, 18 ... Oil supply manifold, 19 ... Anti-vibration rubber, 20 ... Cooler water chamber case, 21 ..Water supply piping, 22 ... drain piping, 23, 24 ... cooling water mother pipe, 25 ... discharge silencer, 26 ... corrugated fin, 27 ... corrugated fin, 28 ... suction port, 29 ... discharge port, 30 ... container, 31 ... heat exchanger nes 33 ... Intercooler, 34 ... After cooler, 35 ... First stage suction passage, 36 ... First stage discharge passage, 37 ... Second stage suction passage, 38a, 38b ... Two steps Discharge passage, 39 ... tube plate, 40 ... outer bar, 41, 51 ... gas chamber (row), 42, 52 ... water chamber (row), 43, 53 ... tube plate, 44, 54 ... rear cooling water chamber, 45, 55 ... partition walls between gas chamber and water chamber, 46, 46a, 47, 56, 57 ... seal plates, 48, 58 ... hot air 49, 59 ... cooling water, 60, 61 ... temperature sensor, 62 ... gas chamber sealing plate, 65 ... casing wall, 71 ... sealing member, 72 ... projection, 73. ..Contact surface, 74 ... outer surface, 75 ... inner wall surface, 76 ... tube, 77 ... gas Inlet, 78 ... Clasp, 79 ... Detachment, 80 ... Fixing plate, 81 ... Bolt, 84 ... Bolt, 87 ... Groove, 88 ... Fixing member, 89 ..Tube plate, 90 ... fixing bolt, 91 ... groove plate, 92 ... thin plate, 93 ... receiving surface.

Claims (7)

A heat exchanger nest in which a plurality of low temperature chambers through which a low temperature fluid flows and a plurality of high temperature chambers through which a high temperature fluid flows are alternately stacked via a partition plate, the flow direction of the low temperature fluid in the low temperature chamber and the high temperature The flow direction of the high-temperature fluid in the chamber is almost orthogonal, and both ends in the stacking direction are cold chambers ,
A fixing member having a U-shaped cross section provided at the bottom of the left and right side surfaces of the heat exchanger nest;
A container in which protrusions are formed on the left and right inner wall surfaces corresponding to the fixing member;
An elastically deformable seal member placed on the upper surface of the protrusion and held in a U-shaped groove formed in the fixing member;
Partitioning the space inside the container into a space in which the high-temperature fluid flows and a space in which the low-temperature fluid cooled by heat exchange in the heat exchanger nest flows, and the seal member on the low-temperature fluid side A heat exchanger for an air compressor characterized by being arranged . The heat exchanger for an air compressor according to claim 1 , wherein the low-temperature fluid is cooling water, and the high-temperature fluid is compressed air. A screw compressor comprising the heat exchanger for an air compressor according to claim 1 . The heat exchanger for an air compressor according to claim 1 , wherein a compression load is applied to the seal member by a mass of the heat exchanger nest. 2. The heat exchanger for an air compressor according to claim 1 , wherein the seal member has a notch formed on the fixed member side, and the protrusion side is tapered . 2. The heat exchanger for an air compressor according to claim 1 , wherein the seal member includes at least one of ethylene propylene rubber, acrylic rubber, silicone rubber, and fluoro rubber as a main component. 2. The heat exchanger for an air compressor according to claim 1 , wherein the seal member is a gas tube seal in which a polymer material is formed in a tube shape and a gas is sealed or injected therein.

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