Packing material for header plate of heat exchanger, and heat exchanger

Abstract

[Problem] The purpose of the present invention is to keep the compression rate of a partition part of a packing material within a suitable range. [Solution] A tank (4) comprises a partition wall part (43) that partitions the internal space of a body part (41) into a first core side and a second core side. A header plate (3) comprises a groove (32) into which an edge (45) of the body part (41) of the tank (4) is inserted. A packing material (5) comprises: an annular section (51) that is inserted into the groove (32) and with which the edge (45) comes into contact; and a partition section (52) that bridges the annular section (51) at a position corresponding to the partition wall part (43) and with which the partition wall part (43) is in contact. The ratio of the height dimension to the width dimension of a cross-section intersecting with the longitudinal direction of the partition section (52) is 1.5-2.0.

Description

Packing for header plate of heat exchanger and heat exchanger

[0001] The present invention relates to a packing for a header plate of a heat exchanger and to a heat exchanger.

[0002] A heat exchanger is known in which a first core and a second core are arranged in parallel. In this case, the tank has a partition wall that separates the first core side from the second core side. Therefore, the packing that seals the gap between the header plate and the tank needs to have a partition wall that seals the gap between the header plate and the partition wall.

[0003] Japanese Patent Application Laid-Open No. 2017-503992

[0004] However, the area of ​​the header plate corresponding to the partition is the area between the holes where the tubes are connected, and therefore its width is narrow. Therefore, in a packing with a circular cross section, the cross-sectional dimensions become small, and the influence of assembly errors becomes relatively large, making it difficult to keep the compression ratio within an appropriate range.

[0005] Furthermore, in conventional header plates, the portions corresponding to the partitions and the portions corresponding to the non-partitions have the same shape, which means that the legs of the partitions are upright, making it difficult to ensure sufficient surface pressure. In response to this, Patent Document 1 discloses a header plate with inclined portions inclined at 20° to 65° at the locations corresponding to the legs of the partitions. However, if the inclination of the inclined portions is too large, it is difficult to ensure sufficient surface pressure on the packing at the legs. On the other hand, if the inclination of the inclined portions is too small, the difference in shape between the portions of the header plate corresponding to the partitions and the portions corresponding to the non-partitions becomes too large, which can lead to thinning or cracking during molding of the header plate.

[0006] In consideration of the above circumstances, the present invention aims to keep the compression ratio of the partition portion of the packing within an appropriate range. Another object of the present invention is to ensure sufficient surface pressure at the leg portions of the partition portion.

[0007] In order to solve the above-mentioned problems, a packing 5 for a header plate 3 of a heat exchanger 100 according to the present invention comprises a first core 1, a second core 2 arranged in parallel with the first core 1, a header plate 3 provided at an end of the first core 1 and the second core 2 in the direction of fluid flow, and a tank 4 provided on the header plate 3, wherein the tank 4 comprises a box-shaped main body 41 having an opening 42 facing the header plate 3, and a partition wall 43 that divides the internal space of the main body 41 into the first core 1 side and the second core 2 side, and the header plate 3 is provided at an edge of the main body 41 of the tank 4. In a heat exchanger (100) having a groove (32) into which a portion (45) of the main body (41) of the tank (4) is inserted, and a hole (31) to which tubes included in the first core (1) and the second core (2) are connected, a gasket (5) is provided between the header plate (3) and the tank (4), the gasket (5) having an annular portion (51) inserted into the groove (32) and contacting the edge portion (45) of the main body (41) of the tank (4), and a partition portion (52) spanning the annular portion (51) at a position corresponding to the partition portion (43) and contacting the partition portion (43), the ratio of the height dimension to the width dimension of a cross section intersecting the longitudinal direction of the partition portion (52) being 1.5 or more and 2.0 or less.

[0008] The partition portion 52 comprises a pair of legs 53 whose lower ends are connected to the annular portion 51, and a girder portion 54 that connects the upper ends of the pair of legs 53, and the pair of legs 53 are inclined toward the center of the girder portion 54, and the inclination angle α of the pair of legs 53 may be greater than or equal to 40 degrees and less than or equal to 50 degrees with respect to a plane whose normal is the fluid flow direction.

[0009] Furthermore, a heat exchanger according to the present invention comprises a first core 1, a second core 2 arranged in parallel with the first core 1, a header plate 3 provided at ends of the first core 1 and the second core 2 in a fluid flow direction, a tank 4 provided on the header plate 3, and a packing 5 provided between the header plate 3 and the tank 4, wherein the tank 4 comprises a box-shaped main body 41 having an opening 42 facing the header plate 3, and a partition wall 43 that divides an internal space of the main body 41 into a first core 1 side and a second core 2 side, The header plate 3 has a groove portion 32 into which the edge portion 45 of the main body portion 41 of the tank 4 is inserted, and a hole portion 31 to which tubes included in the first core 1 and the second core 2 are connected, and the gasket 5 has an annular portion 51 that is inserted into the groove portion 32 and with which the edge portion 45 of the main body portion 41 of the tank 4 contacts, and a partition portion 52 that is bridged across the annular portion 51 at a position corresponding to the partition portion 43 and with which the partition portion 43 contacts, and the ratio of the height dimension to the width dimension of the cross section intersecting the longitudinal direction of the partition portion 52 is 1.5 or more and 2.0 or less.

[0010] According to the present invention, the compression ratio of the partition portion of the packing can be kept within an appropriate range.

[0011] 12 is an exploded view showing a heat exchanger according to one embodiment of the present invention. It is a plan view showing a header plate according to one embodiment of the present invention. It is an enlarged view showing region A of FIG. 2. It is a cross-sectional view showing the II-II cross-section of FIG. 3. It is a cross-sectional view showing the II-II cross-section of FIG. 3. It is a cross-sectional view showing the III-III cross-section of FIG. 3. It is a plan view showing a tank according to one embodiment of the present invention. It is a front view showing a tank according to one embodiment of the present invention. It is a bottom view showing a tank according to one embodiment of the present invention. It is a cross-sectional view showing the IV-IV cross-section of FIG. 9. It is a cross-sectional view showing the V-V cross-section of FIG. 9. It is a plan view showing a packing according to one embodiment of the present invention. It is an enlarged view showing region B of FIG. 12. It is a cross-sectional view showing the VI-VI cross-section of FIG. 13. It is a cross-sectional view showing the VII-VII cross-section of FIG. 13. It is a cross-sectional view showing the VIII-VIII cross-section of FIG. 13. It is a cross-sectional view showing the IX-IX cross-section of FIG. 13. It is a cross-sectional view showing the II-I cross-section showing the packing and the tank assembled to the header plate according to one embodiment of the present invention. It is a III-III cross-sectional view showing the packing and the tank assembled to the header plate according to one embodiment of the present invention.

[0012] Hereinafter, a packing 5 and a heat exchanger 100 according to an embodiment of the present invention will be described with reference to the drawings.

[0013] 1 is an exploded view showing a heat exchanger 100. In each drawing, U, Lo, L, R, Fr, and Rr indicate top, bottom, left, right, front, and rear, respectively.

[0014] While the present embodiment illustrates an example in which the present invention is applied to a vertical-flow heat exchanger 100, the present invention may also be applied to a horizontal-flow heat exchanger 100. The heat exchanger 100 includes a first core 1, a second core 2, a header plate 3, a tank 4, and a packing 5. The header plate 3, the tank 4, and the packing 5 are provided at both the upper and lower ends of the heat exchanger 100, but the present embodiment describes the configuration of the upper end. The first core 1 and the second core 2 include multiple tubes with their longitudinal direction in the vertical direction and fins provided between the tubes (not shown). The multiple tubes have a flat cross-sectional shape and are equally spaced in the left-right direction with the longitudinal direction of the cross section in the front-to-rear direction. A fluid flows downward through the tubes. The fluid may be, for example, a coolant. The header plate 3 is provided at the upper ends of the first core 1 and the second core 2. The tank 4 is provided above the header plate 3. The packing 5 is provided between the header plate 3 and the tank 4. The fluid according to this embodiment includes a heat transfer medium for cooling or heating, and may be a liquid or a gas.

[0015] Fig. 2 is a plan view showing the header plate 3. Fig. 3 is an enlarged view showing area A in Fig. 2. Fig. 4 is a cross-sectional view showing the II-II cross section in Fig. 3. Fig. 5 is a cross-sectional view showing the II-II cross section in Fig. 3. Fig. 6 is a cross-sectional view showing the III-III cross section in Fig. 3.

[0016] The header plate 3 is formed in a rectangular plate shape with the longitudinal direction extending in the left-right direction. The header plate 3 has the same number of holes 31 as the number of tubes, and grooves 32. The holes 31 are flat, elongated holes similar to the tubes. The edges of the holes 31 protrude upward. One tube is connected to each hole 31. The grooves 32 are provided in an annular shape along the four sides of the header plate 3. The grooves 32 surround the area in which the holes 31 are provided.

[0017] The I-I cross section is a cross section of a portion of the header plate 3 that is not the hole 31 and does not correspond to the partition wall 43 of the tank 4, which will be described later. The II-II cross section is a cross section of the hole 31 of the header plate 3. The III-III cross section is a cross section of a portion of the header plate 3 that corresponds to the partition wall 43. In the I-I and II-II cross sections, the side wall 33 of the groove 32 on the central side of the header plate 3 is upright. On the other hand, in the III-III cross section, the side wall 33 of the groove 32 on the central side of the header plate 3 is inclined toward the center of the header plate 3. The inclination angle α of the side wall 33 is 40 degrees or more and 50 degrees or less, based on a plane whose normal is the fluid flow direction (vertical direction).

[0018] Fig. 7 is a plan view showing the tank 4. Fig. 8 is a front view showing the tank 4. Fig. 9 is a bottom view showing the tank 4. Fig. 10 is a cross-sectional view showing the IV-IV cross section of Fig. 9. Fig. 11 is a cross-sectional view showing the VV cross section of Fig. 9.

[0019] The tank 4 includes a main body 41, an opening 42, and a partition wall 43. The main body 41 is formed in a box shape and has the opening 42 facing the header plate 3. The partition wall 43 divides the internal space of the main body 41 into a first core 1 side and a second core 2 side. Inflow ports 44 through which fluid flows in are provided at both left and right ends of the main body 41.

[0020] Fig. 12 is a plan view showing the packing 5. Fig. 13 is an enlarged view showing region B of Fig. 12. Fig. 14 is a cross-sectional view showing the VI-VI cross section of Fig. 13. Fig. 15 is a cross-sectional view showing the VII-VII cross section of Fig. 13. Fig. 16 is a cross-sectional view showing the VIII-VIII cross section of Fig. 13. Fig. 17 is a cross-sectional view showing the IX-IX cross section of Fig. 13.

[0021] The packing 5 includes an annular portion 51 and a partition portion 52. The annular portion 51 is inserted into the groove portion 32 and contacts the edge portion 45 of the opening 42 of the main body portion 41 of the tank 4. The partition portion 52 bridges the annular portion 51 at a position corresponding to the partition portion 43 and contacts the partition portion 43 of the tank 4. The ratio (aspect ratio) of the height dimension H to the width dimension L of a cross section of the partition portion 52 intersecting the longitudinal direction is 1.5 or more and 2.0 or less.

[0022] The partition 52 includes a pair of legs 53 and a girder 54. The pair of legs 53 have their lower ends joined to the annular portion 51 and their upper ends connected to each other by the girder 54. The pair of legs 53 are inclined toward the center of the girder 54. The inclination angle α (see FIG. 14 ) of the pair of legs 53 is between 40 degrees and 50 degrees with respect to a plane normal to the fluid flow direction (vertical direction).

[0023] The girder 54 is provided with protrusions 55 that protrude in the left-right direction. The protrusions 55 protrude left and right from both the left and right side surfaces of the girder 54. In a cross section intersecting the front-rear direction, a chamfered surface 56 is formed on the upper part of the girder 54. The protrusions 55 and the chamfered surface 56 prevent the girder 54 from tipping over and ensure a sufficient filling rate. Note that instead of the chamfered surface 56, an R-processing (rounding) may be performed.

[0024] 18 is a cross-sectional view taken along line II showing the state in which the packing 5 and tank 4 are assembled to the header plate 3. The II cross-section corresponds to both the left and right sides of the partition 52, and corresponds to most of the header plate 3. In the II cross-section, the annular portion 51 of the packing 5 is inserted into the groove 32, and the packing 5 comes into contact with the edge 45 of the main body 41 of the tank 4. Then, the outer edge 34 of the header plate 3 is crimped inward, pressing the edge 45 against the packing 5.

[0025] 19 is a cross-sectional view taken along III-III, showing the state in which the packing 5 and the tank 4 are assembled to the header plate 3. The III-III cross-section corresponds to the partition 52. In the past, the side wall 33 of the groove 32 on the central side of the header plate 3 and the leg 53 of the partition 52 were upright in the III-III cross-section, just as in the II cross-section, and therefore sufficient surface pressure could not be ensured at the leg 53. In contrast, in this embodiment, the side wall 33 of the groove 32 on the central side of the header plate 3 and the leg 53 of the partition 52 are inclined at the same inclination angle α in the III-III cross-section.

[0026] However, if the inclination angle α of the legs 53 is too high, for example, if it exceeds 50 degrees with respect to a plane normal to the fluid flow direction, sufficient surface pressure cannot be ensured. Also, if the inclination angle α of the legs 53 is too low, for example, if it is less than 40 degrees with respect to a plane normal to the fluid flow direction, the portion of the header plate 3 corresponding to the partition 52 may be thinned, and cracks may occur.

[0027] In contrast, in this embodiment, the inclination angle α of the leg 53 is between 40 degrees and 50 degrees based on a plane normal to the fluid flow direction, so that sufficient surface pressure is ensured on the gasket 5 at the leg 53 and thinning and cracking of the header plate 3 can be prevented.

[0028] The packing 5 for the header plate 3 of the heat exchanger 100 according to the present embodiment described above includes the first core 1, the second core 2 arranged in parallel with the first core 1, the header plate 3 arranged at the end of the first core 1 and the second core 2 in the fluid flow direction, and the tank 4 arranged on the header plate 3, the tank 4 including a box-shaped main body 41 having an opening 42 facing the header plate 3, and a partition wall 43 dividing the internal space of the main body 41 into the first core 1 side and the second core 2 side. In a heat exchanger (100) having a groove (32) into which a portion (45) is inserted, and a hole (31) to which tubes included in a first core (1) and a second core (2) are connected, a gasket (5) is provided between a header plate (3) and a tank (4), the gasket (5) having an annular portion (51) inserted into the groove (32) and contacting an edge portion (45) of a main body portion (41) of the tank (4), and a partition portion (52) spanning the annular portion (51) at a position corresponding to the partition portion (43) and contacting the partition portion (43), the ratio of the height dimension to the width dimension of a cross section intersecting the longitudinal direction of the partition portion (52) being 1.5 or more and 2.0 or less.

[0029] According to this embodiment, the ratio of the height dimension to the width dimension of the cross section of the partition section 52 is set to 1.5 to 2.0, so that a sufficient packing height can be obtained even if the installation width is narrow, and the influence of errors in the compression amount of the packing 5 is relatively mitigated, so that the compression rate of the packing 5 in the partition section 52 can be kept within an appropriate range.

[0030] Furthermore, according to the packing 5 of this embodiment, the partition portion 52 comprises a pair of legs 53 whose lower ends are connected to the annular portion 51, and a girder portion 54 that connects the upper ends of the pair of legs 53, and the pair of legs 53 are inclined toward the center of the girder portion 54, and the inclination angle α of the pair of legs 53 is greater than or equal to 40 degrees and less than or equal to 50 degrees with respect to a plane whose normal is the fluid flow direction.

[0031] According to this embodiment, by setting the inclination angle α of the legs 53 to 50 degrees or less, it is possible to ensure sufficient surface pressure on the packing 5 at the legs 53. Furthermore, by setting the inclination angle α of the legs 53 to 40 degrees or more, the difference in shape between the portion of the header plate 3 corresponding to the partition 52 and the portion of the header plate 3 corresponding to parts other than the partition 52 is reduced, thereby preventing thinning and cracking during molding of the header plate 3. According to this embodiment, since the inclination angle α of the legs 53 is 40 degrees or more and 50 degrees or less, it is possible to both ensure the surface pressure of the packing 5 at the legs 53 and prevent thinning and cracking during molding of the header plate 3.

[0032] The above embodiment may be modified as follows.

[0033] In the above embodiment, an example of a composite heat exchanger 100 having a first core 1 and a second core 2 is shown, but the present invention may also be applied to a U-turn type heat exchanger in which fluid flows into the core from one compartment of a partitioned tank and flows out from the other compartment.

[0034] The above embodiment includes a first core 1, a second core 2 arranged in parallel with the first core 1, a header plate 3 provided at the ends of the first core 1 and the second core 2 in the fluid flow direction, a tank 4 provided on the header plate 3, and a packing 5 provided between the header plate 3 and the tank 4. The tank 4 includes a box-shaped main body 41 having an opening 42 facing the header plate 3, and a partition wall 43 that divides the internal space of the main body 41 into a first core 1 side and a second core 2 side. The header plate 3 is a part of the main body 41 of the tank 4. a groove portion 32 into which an edge portion 45 of the main body portion 41 of the tank 4 is inserted, and a hole portion 31 to which tubes included in the first core 1 and the second core 2 are connected, the gasket 5 is inserted into the groove portion 32 and has an annular portion 51 with which the edge portion 45 of the main body portion 41 of the tank 4 comes into contact, and a partition portion 52 that spans the annular portion 51 at a position corresponding to the partition portion 43 and comes into contact with the partition portion 43 of the tank 4, and the ratio of the height dimension to the width dimension of the cross section of the partition portion 52 that intersects the longitudinal direction is 1.5 or more and 2.0 or less.

[0035] REFERENCE SIGNS LIST 1 First core 2 Second core 3 Header plate 4 Tank 5 Packing 31 Hole 32 Groove 41 Main body 42 Opening 43 Partition 51 Annular portion 52 Partition 53 Leg 54 Girder

Claims

1. A compressor comprising: a first core (1); a second core (2) arranged in parallel with the first core (1); a header plate (3) provided at the end of the first core (1) and the second core (2) in the direction of fluid flow; and a tank (4) provided on the header plate (3), wherein the tank (4) comprises: a box-shaped main body (41) having an opening (42) facing the header plate (3); and a partition wall (43) dividing the internal space of the main body (41) into a first core (1) side and a second core (2) side; and the header plate (3) comprises: a groove (32) into which an edge (45) of the main body (41) of the tank (4) is inserted; a packing (5) provided between the header plate (3) and the tank (4) in a heat exchanger (100) having a hole (31) to which tubes included in the first core (1) and the second core (2) are connected, the packing (5) comprising: an annular portion (51) inserted into the groove (32) and contacting the edge portion (45) of the main body portion (41) of the tank (4); and a partition portion (52) spanning the annular portion (51) at a position corresponding to the partition portion (43) and contacting the partition portion (43), wherein the ratio of the height dimension to the width dimension of a cross section of the partition portion (52) intersecting the longitudinal direction is 1.5 or more and 2.0 or less.

2. A packing for a header plate of a heat exchanger as described in claim 1, characterized in that the partition portion (52) comprises a pair of legs (53) whose lower ends are connected to the annular portion (51), and a girder portion (54) connecting the upper ends of the pair of legs (53), the pair of legs (53) are inclined toward the center of the girder portion (54), and the inclination angle (α) of the pair of legs (53) is between 40 degrees and 50 degrees with respect to a plane normal to the fluid flow direction.

3. A compressor comprising: a first core (1); a second core (2) arranged in parallel with the first core (1); a header plate (3) provided at the ends of the first core (1) and the second core (2) in the direction of fluid flow; a tank (4) provided on the header plate (3); and a packing (5) provided between the header plate (3) and the tank (4), wherein the tank (4) comprises: a box-shaped main body (41) having an opening (42) facing the header plate (3); and a partition wall (43) dividing the internal space of the main body (41) into a first core (1) side and a second core (2) side, and the header plate (3) comprises: a groove (32) into which an edge (45) of the main body (41) of the tank (4) is inserted; and a hole (31) to which tubes included in the first core (1) and the second core (2) are connected, The packing (5) comprises: an annular portion (51) that is inserted into the groove portion (32) and that comes into contact with the edge portion (45) of the main body portion (41) of the tank (4); and a partition portion (52) that spans the annular portion (51) at a position corresponding to the partition portion (43) and that comes into contact with the partition portion (43), wherein a ratio of a height dimension to a width dimension of a cross section of the partition portion (52) that intersects with the longitudinal direction is 1.5 or more and 2.0 or less.

Images