WO2019059039A1

WO2019059039A1 - Header tank and heat exchanger

Info

Publication number: WO2019059039A1
Application number: PCT/JP2018/033580
Authority: WO
Inventors: 拓也三ツ橋
Original assignee: 株式会社デンソー
Priority date: 2017-09-21
Filing date: 2018-09-11
Publication date: 2019-03-28
Also published as: JP2019056517A; JP6809423B2

Abstract

This header tank is provided with: a tank component (31) having an outer shell (317) and a partition (315) that partitions the inside of the outer shell (317); and a plate component (32) to which can be attached a tube (42) through which a refrigerant passes. A peripheral portion (316f) that faces the plate component (32) is provided in a position spaced further apart from the bottom of the tank component (31) than an upper end portion (315d) is. A packing portion (318) is integrally formed, by injection molding, at the peripheral portion (316f) and the upper end portion (315d) to ensure airtightness with the plate component (32).

Description

Header tank and heat exchanger

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2017-181023 filed on September 21, 2017, and claims the benefit of its priority, and the entire contents of the patent application are: Incorporated herein by reference.

The present disclosure relates to a header tank for use in a heat exchanger and a heat exchanger including the header tank.

The header tank used for the heat exchanger has a function of receiving the refrigerant circulating in the refrigeration cycle and distributing and flowing out the refrigerant to the tube forming the core of the heat exchanger. In order to fulfill its function, the header tank is composed of a tank part forming an internal space through which the refrigerant flows and a plate part attached to the opening of the tank part and to which a tube can be attached.

In the header tank described in Patent Document 1 below, packing is provided on the tank component in order to prevent the refrigerant from leaking from the portion where the tank component and the plate component are joined. The packing is formed integrally with the tank part by injection molding, and has a complete seal structure in which the refrigerant does not leak in the divided inner space.

JP, 2016-17722, A

In Patent Document 1, the inside of the header tank is divided into three sections, and the first section and the second section through which the refrigerant flows, and the first section and the second section do not allow the refrigerant to flow. A third partition is formed. The third partition functions as a portion where the resin material injected from the gate overflows when the packing is integrally formed on the tank component by injection molding. In addition, a dummy tube which does not allow the flow of the refrigerant is provided on the plate component corresponding to the third partition portion, and the structure also serves as a measure against thermal distortion.

However, when a dummy tube is provided, since the tube through which the refrigerant flows can not be disposed at that portion, the performance as the heat exchanger will be degraded with respect to the heat exchanger of the same size.

An object of the present disclosure is to provide a header tank that does not degrade the performance of a heat exchanger while securing a complete seal structure.

The present disclosure is a header tank used for a heat exchanger, and is provided in an outer shell (317) forming a first chamber into which the refrigerant flows in and out and a second chamber into which the refrigerant flows in and out; A tank part (31) having a partition part (315) for separating the first chamber and the second chamber, and a tube attached to an opening formed in the tank part and attaching a tube through which a refrigerant is passed And a plate component (32) provided with an attachment portion, wherein a peripheral portion (316f) facing the plate component in the outer shell portion is a bottom portion of the tank component than an upper end portion (315d) of the partition portion. And the packing part (318) for securing air tightness between the plate part and the peripheral part and the upper end part by injection molding. It is formed in.

Since the peripheral portion facing the plate component in the outer shell portion is provided at a position higher than the upper end portion of the partition portion and at a position separated from the bottom portion of the tank component, the plate component is also shaped according to this height difference. It is possible to secure the rigidity of the plate component. Since the packing portion is integrally formed as a part of the tank part by injection molding so as to ensure airtightness between the plate part and the peripheral part and the upper end part, the packing part may be displaced. As a result, the complete seal structure can be secured while the assemblability is also improved.

The reference numerals in parentheses described in the “Summary of the invention” and the “claims” indicate the correspondence with the “embodiments for carrying out the invention” described later, and the “Summary of the Invention” and The scope of the claims does not indicate that the scope of the present invention is limited to the embodiments described below.

FIG. 1 is a schematic configuration view showing a heat exchanger including a header tank according to the present embodiment. FIG. 2 is a cross-sectional view showing a II-II cross section of FIG. FIG. 3 is a cross-sectional view showing a III-III cross section of FIG. FIG. 4 is a perspective view for explaining the overflow portion shown in FIGS. 1 and 2. FIG. 5 is a cross-sectional view showing a VV cross section of FIG. 6 is a cross-sectional view showing a VI-VI cross section of FIG. FIG. 7 is a plan view of a packing portion constituting the header tank according to the present embodiment.

Hereinafter, the present embodiment will be described with reference to the attached drawings. In order to facilitate understanding of the description, the same constituent elements in the drawings are denoted by the same reference numerals as much as possible, and redundant description will be omitted.

A header tank and a heat exchanger according to the present embodiment will be described with reference to FIG. The heat exchanger 2 includes a header tank 3, a heat exchange unit 4, and a header tank 5. The header tank 3 and the header tank 5 are disposed to sandwich the heat exchange unit 4. In FIG. 1, the direction from the header tank 3 to the header tank 5 is taken as an x axis, the longitudinal direction of the header tank 3 and the header tank 5 as ay axis, and the direction orthogonal to the x axis and the y axis as az axis. Also in FIG. 2 and subsequent drawings, the description will be made with reference to the x-axis, y-axis and z-axis set in this way.

The header tank 3 includes a tank part 31 and a plate part 32. The tank part 31 is a box-like part in which an opening is formed. The tank part 31 is, for example, a resin molded product formed by filling a resin containing fibers obtained by adding glass fiber as a reinforcing material to a polyamide resin in a mold.

The plate part 32 is attached to the opening of the tank part 31 and a tube 42 for passing the refrigerant is attached. The plate component 32 is preferably made of, for example, aluminum having high thermal conductivity in order to ensure high thermal conductivity.

The tank component 31 has an outer shell 317 and a partition 315. The outer shell portion 317 forms a first chamber 313 in which the refrigerant flows in and out, and a second chamber 314 in which the refrigerant flows in and out. The partition part 315 is disposed in the outer shell part 317 and partitions the first chamber 313 and the second chamber 314.

The refrigerant flows into the first chamber 313 from the refrigerant introduction pipe 311. The refrigerant flowing into the refrigerant introduction pipe 311 is a refrigerant that has circulated through the refrigeration cycle. The refrigerant flowing into the first chamber 313 flows out to the heat exchange unit 4.

The refrigerant flows into the second chamber 314 from the heat exchange unit 4. The refrigerant flowing into the second chamber 314 flows out of the refrigerant lead-out pipe 312. The refrigerant flowing out to the refrigerant lead-out pipe 312 circulates in the refrigeration cycle.

The heat exchange unit 4 includes an outer plate 41, a tube 42, and fins 43. The outer plate 41, the tube 42, and the fins 43 respectively extend along the x axis. The tubes 42 and the fins 43 are alternately arranged along the y-axis. The outer plates 41 are disposed at both ends so as to sandwich the tube 42 and the fins 43 in the direction along the y-axis. The tubes 42 and the fins 43 are preferably made of, for example, aluminum having high thermal conductivity in order to ensure high thermal conductivity.

The tube 42 is disposed so as to allow the refrigerant to flow into and out of the header tank 3 and the header tank 5. The refrigerant flows from the first chamber 313 into the tube 42 connected to the first chamber 313 of the header tank 3. The refrigerant flowing into the tubes 42 flows toward the header tank 5 while exchanging heat with air passing between the fins 43 and between the adjacent tubes 42.

The refrigerant flowing toward the header tank 5 flows into the tube 42 connected to the second chamber 314 of the header tank 3. The refrigerant flowing into the tubes 42 flows toward the header tank 3 while exchanging heat with air passing between the fins 43 and between the adjacent tubes 42.

The header tank 5 includes a tank part 51 and a plate part 52. The tank component 51 is, for example, a resin molded product formed by filling a resin containing fibers obtained by adding glass fiber as a reinforcing material to a polyamide resin in a mold. The plate component 52 is attached to the opening of the tank component 51, and a tube 42 for passing the refrigerant is attached.

Subsequently, a structure for assembling the tank component 31 and the plate component 32 will be described with reference to FIG. FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

The outer shell 317 of the tank part 31 is formed with a collar 316 for attaching the plate part 32. In the outer shell 317, the opposite side to the portion where the collar portion 316 is formed is closed in a curved shape, and forms the bottom of the tank component. The collar portion 316 protrudes outward along the yz plane over the entire circumference of the opening of the outer shell 317. The surface of the flange portion 316 facing the plate component 32 is formed as a peripheral portion 316 f. Inside the peripheral portion 316f, there is provided a connecting inclined portion 316e which is inclined and connected to the inner periphery of the outer shell 317.

The plate component 32 includes a central step 321, both side steps 322, a flat portion 323, a holding portion 324, and a bent portion 325. The central step portion 321 is a portion recessed most toward the tank component 31 in the central portion of the plate component 32 in the z-axis direction.

The side step portions 322 are provided on both sides of the central step portion 321 in the z-axis direction. The side step 322 is a recessed portion shallower than the central step 321 so as to be separated from the tank component 31 more than the central step 321.

The flat portions 323 are provided on both sides of the side step portions 322 in the z-axis direction. The flat portion 323 is provided over the entire circumference of the opening of the outer shell portion 317 so as to face the peripheral portion 316 f provided on the collar portion 316 of the tank component 31.

The holding portions 324 are provided on both sides of the flat portion 323 in the z-axis direction. The holding portion 324 is provided along the entire outer circumference of the collar portion 316 so as to be along the outer peripheral side of the collar portion 316 of the tank component 31.

The bending portion 325 is provided by bending so that a part of the tip end side of the holding portion 324 wraps around the collar portion 316.

In the partition portion 315, a flat plate portion 315a, a storage portion 315b, an opening portion 315c, and an upper end portion 315d are provided. The flat plate portion 315 a is a flat plate-like portion provided so as to be connected to the inner peripheral surface of the outer shell portion 317.

The storage portion 315b is provided substantially at the center of the flat plate portion 315a, and a storage space is formed inside (see FIG. 4). The opening portion 315c is provided to be connected to the storage portion 315b, and is a portion that opens to face the upper end portion 315d. The overflow part 35 is formed of the storage part 315b and the opening part 315c. The upper end portion 315 d is formed as an end on the side closest to the plate component 32 of the partition portion 315.

A packing portion 318 is provided between the partition portion 315 and the plate part 32 and between the collar part 316 and the plate part. The packing part 318 is integrally formed as a part of the tank part 31 by injection molding. The packing portion 318 is formed of a flexible resin material.

The packing portion 318 includes a first packing portion 318a, a second packing portion 318b, a third packing portion 318c, and a fourth packing portion 318d. The first packing portion 318 a is provided to correspond to the central step 321. The second packing portion 318 b is provided to correspond to the side step portions 322. The third packing portion 318c is provided to correspond to the connection slope 316e. The fourth packing portion 318d is provided to correspond to the peripheral portion 316f.

Focusing on the space between the partition part 315 and the plate part 32, the packing part 318 is provided to ensure airtightness between the peripheral part 316f, the connection slope part 316e and the upper end part 315d and the plate part 32. There is.

Subsequently, the configuration of the packing portion 318 will be described with reference to FIGS. 3, 5 and 6. FIG. 3 is a cross-sectional view taken along the line xy of FIG. 2 taken along the line III-III.

As shown in FIG. 3, the plate component 32 is provided with a tube attachment portion 326 for attaching the tube 42. The tube attachment portions 326 are openings formed in the plate component 32 by press processing, and are provided at equal intervals in the tubes 42 so as to correspond to the number.

A central stepped portion 321 is provided between the pair of tube attachment portions 326. A groove portion 321 a is formed on the side of the partition portion 315 of the central step portion 321. The packing portion 318 corresponding to the groove 321a is a first packing portion 318a. The first packing portion 318a is formed wide according to the shape of the groove 321a.

FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 2 and in the xy plane. As shown in FIG. 5, a side step 322 is provided between the pair of tube attachment portions 326. A groove 322 a is formed on the side of the partition 315 of the side step 322. The groove 322a is deeper than the groove 321a, and the inclination of the bottom is steeper than in the case of the groove 321a.

The packing portion 318 corresponding to the groove 322a is a second packing portion 318b. The second packing portion 318b is formed to have a tip narrower than the first packing portion 318a in accordance with the shape of the groove 322a.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 2 and taken along the xy plane. As shown in FIG. 6, since the third packing portion 318c abuts on the flat portion 323 of the plate part 32, the third packing portion 318c is formed in a standard shape that can abut on a flat surface to ensure airtightness. . The third packing portion 318c is also a portion connected to the fourth packing portion 318d. The fourth packing portion 318 d is also formed to be in contact with a flat surface to ensure air tightness.

As shown in FIG. 7, the packing portion 318 is formed such that the fourth packing portion 318 d surrounds the rectangular outer periphery. The first packing portion 318 a, the second packing portion 318 b, and the third packing portion 318 c are formed to correspond to the partition portion 315.

As described above, in the present embodiment, the header tank 3 of the present embodiment is a header tank used for the heat exchanger 2 and includes a tank component 31 and a plate component 32. The tank component 31 includes a first chamber 313 in which the refrigerant flows in and out, and an outer shell 317 forming a second chamber 314 in which the refrigerant flows in and out, and the first chamber 313 and the second chamber 314 disposed in the outer shell 317 And the partition part 315 which partitions off. The plate component 32 is attached to an opening formed in the tank component 31 and provided with a tube attachment portion 326 for attaching a tube 42 through which the refrigerant passes. The tank part 31 is provided with a packing portion 318. The packing portion 318 is provided such that the peripheral portion 316 f facing the plate component 32 in the outer shell portion 317 is located higher than the upper end portion 315 d of the partition portion 315 and is separated from the bottom of the tank component The portion 316 f and the upper end portion 315 d are integrally formed by injection molding so as to ensure airtightness with the plate component.

Since the peripheral portion 316 f facing the plate part 32 in the outer shell part 317 is provided at a position higher than the upper end part 315 d of the partition part 315 and separated from the bottom of the tank part, the plate part 32 is also It becomes possible to make it the shape according to the difference, and the rigidity of the plate component 32 can be secured. Since the packing portion 318 is integrally formed as a part of the tank part by injection molding so as to ensure airtightness between the peripheral part 316 f and the upper end part 315 d with the plate part 32, the packing part 318 is It is possible to secure a complete seal structure while improving the assemblability without shifting.

Further, in the present embodiment, the packing portion 318 is provided continuously from the peripheral portion 316 f to the upper end portion 315 d and along the surface of the plate component 32 facing the tank component 31 side.

Since the packing portion 318 is provided continuously along the plate component 32 from the peripheral portion 316 f to the upper end portion 315 d, air tightness can be ensured more reliably.

Further, in the present embodiment, the plate component 32 is provided with a plurality of tube attachment portions 326 adjacent to each other, and between the adjacent tube attachment portions 326,

groove portions

321a and 322a which retract in a direction away from the tank component 31 are provided. It is formed. The

groove portions

321a and 322a are provided such that the depth of the groove changes over the flat portion 323 at the position where the plate component 32 faces the peripheral portion 316f, and the packing portion 318 corresponds to the partition portion 315 by changing the width. It is provided so as to be in close contact with the plate component 32 across the flat portions 323 from the

groove portions

321a and 322a provided.

Since the

grooves

321a and 322a are provided between the tube attachment portions 326, the rigidity of the plate component 32 can be enhanced. The

groove portions

321a and 322a are also provided at positions corresponding to the partition portion 315, so that rigidity can be secured over the entire plate component 32. The packing portion 318 has its width changed corresponding to the change in the depth of the

groove portions

321a and 322a, and is provided in close contact with the plate component 32. Therefore, the rigidity of the plate component 32 and airtightness as the header tank It can be compatible with securing of sex.

The cross-sectional shape of the packing portion 318 can thus be provided to change its width in response to changes in the depth of the

groove portions

321a and 322a, but the portion provided on the peripheral portion 316f starts from the upper end portion 315d. It can also be provided so as to have a uniform shape over the portion provided on the.

Further, in the present embodiment, the dividing portion 315 is provided with the overflow portion 35 for causing the material for forming the packing portion 318 to overflow. The overflow portion 35 has a storage portion 315 b forming a storage space inside the partition portion 315, and an opening 315 c connected to the storage portion 315 b and facing the upper end portion 315 d of the partition portion 315.

The overflow portion 35 provided in the partition portion 315 is configured so that the material forming the packing portion 318 flows from the opening portion 315c facing the upper end portion 315d of the partition portion 315 and is accumulated in the storage portion 315b forming the storage space. Therefore, it is possible to suppress that the material forming the packing portion 318 remains in the portion where the refrigerant flows.

In the present embodiment, the material forming the packing portion 318 flows into the storage portion 315 b, but the material may overflow to the side surface of the partition portion 315. In the present embodiment, the partitioning portion 315 is provided only at one place, but a wall for partitioning the internal space formed by the outer shell portion 317 may be additionally installed as needed.

The present embodiment has been described above with reference to the specific example. However, the present disclosure is not limited to these specific examples. Those appropriately modified in design by those skilled in the art are also included in the scope of the present disclosure as long as the features of the present disclosure are included. The elements included in the above-described specific examples, and the arrangement, conditions, and shapes thereof are not limited to those illustrated, but can be appropriately modified. The elements included in the above-described specific examples can be appropriately changed in combination as long as no technical contradiction arises.

Claims

A header tank used for a heat exchanger,
A first chamber into which the refrigerant flows in and out, and an outer shell portion (317) forming a second chamber into which the refrigerant flows in and out, and a partition portion which is disposed in the outer shell portion and divides the first chamber and the second chamber 315) and a tank part (31) having
And a plate component (32) attached to the opening formed in the tank component and provided with a tube attachment portion for attaching a tube through which the refrigerant passes.
A peripheral edge portion (316f) opposite to the plate component in the outer shell portion is provided at a position farther from the bottom portion of the tank component than the upper end portion (315d) of the partition, A header tank in which a packing portion (318) for ensuring air tightness with the plate component is integrally formed at the upper end portion by injection molding.
The header tank according to claim 1, wherein
The header tank is provided continuously from the peripheral edge portion to the upper end portion and along a surface of the plate component facing the tank component side.
The header tank according to claim 2, wherein
A plurality of the tube mounting portions are provided adjacent to each other on the plate component,
Between adjacent tube mountings, grooves are formed which retract in a direction away from the tank component,
The groove portion is provided such that the depth of the groove changes over a flat portion at a position where the plate component faces the peripheral edge portion,
The header tank is provided so as to be in close contact with the plate component across the flat portion from the groove portion provided corresponding to the partition portion by changing the width.
The header tank according to claim 2, wherein
The header tank is provided so that the section shape of the packing part may become uniform from the part provided in the peripheral part to the part provided in the upper end part.
The header tank according to claim 1, wherein
The partition portion is provided with an overflow portion for causing a material for forming the packing portion to overflow.
A header tank having a storage section (315b) forming a storage space inside the partition section, and an opening section (315c) connected to the storage section and facing an upper end portion of the partition section;
A heat exchanger comprising the header tank according to any one of claims 1 to 5.