JPH10288475A - Stacked type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain space-saving and simplification of an inlet-outlet part of a refrigerant by a constitution wherein first and second inlet-outlet forming parts wherein a refrigerant inlet part and a refrigerant outlet part are formed are joined face-to-face in the stacking direction, in regard to an inlet and an outlet which are fixed to the outside in the stacking direction of a tube element in the outermost part. SOLUTION: An inlet-outlet part 10 of a refrigerant is formed by joining face-to-face a first inlet-outlet forming part 10A and a second inlet-outlet forming part 10B which are paired molded plates. A refrigerant inlet passage 43 communicating with a first through port 41 to which a communication pipe 15 is fitted and a refrigerant outlet passage 44 communicating with a second through port 42 are formed and a refrigerant inlet 45 and a refrigerant outlet 46 are opened perpendicularly to the stacking direction, while an inlet pipe 21 and an outlet pipe 22 which are formed in a plate 20 for fitting a block type expansion valve are inserted and fitted in the refrigerant inlet 45 and the refrigerant outlet 46 respectively and fixed thereto by brazing. According to this constitution, even a vehicle wherein a sufficient space can not be formed in the stacking direction is made free from stretching-around of a piping and the block type expansion valve can be mounted thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a heat exchanger used for a vehicle air conditioner, and more particularly to a laminated heat exchanger used as an evaporator.

[0002]

2. Description of the Related Art A conventional laminated heat exchanger is disclosed in
The object disclosed in JP-A-41259 is to provide a laminated heat exchanger having a large degree of freedom in piping that can easily realize a so-called counterflow even when a heat exchange medium is supplied from the windward side. At least one of the manifolds has a through chamber through which a heat exchange medium passes through at least one end of a flow path of a tube element adjacent on both sides, and the other end of a flow path of the tube element adjacent on both sides. A distribution collection chamber for distributing and collecting a heat exchange medium by communicating the sides thereof with each other and communicating with an opening connecting the supply pipe through a bypass formed around the through chamber. The flow direction of the refrigerant at the entrance / exit portion is the direction of the ventilation of the heat exchanger.

The stacked heat exchanger disclosed in FIG. 1 of Japanese Patent Application Laid-Open No. 8-271177 has an inlet / outlet at one end in the stacking direction, and the refrigerant flow direction at the inlet / outlet is in the stacking direction. It is. Further, the laminated heat exchanger disclosed in FIG. 7 has an inlet / outlet section formed integrally with the tube element, and the refrigerant flow direction at the inlet / outlet section is the direction of air flow of the heat exchanger.

[0004]

However, Japanese Patent Laid-Open No.
In the stacked heat exchanger disclosed in FIG. 1 of JP-A-271177, since the inlet / outlet portion of the refrigerant is open in the stacking direction, the block type expansion valve is mounted in the stacking direction. There is a problem that this type of stacked heat exchanger is difficult to attach to a vehicle type that cannot take up enough space.

Further, in the laminated heat exchanger disclosed in Japanese Utility Model Laid-Open No. 7-41259 and the laminated heat exchanger disclosed in FIG. Since the coolant inlet / outlet portion is formed and a predetermined interval between the coolant inlet / outlet portions is opened, it is necessary to draw a pipe from the coolant inlet / outlet portion to a position where an expansion valve is mounted, and the number of parts increases. In addition, a space for piping is required.

Accordingly, an object of the present invention is to provide a laminated heat exchanger in which the space for the inlet and outlet of the refrigerant is reduced and simplified, and the mounting direction of the expansion valve is perpendicular to the laminating direction.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a plurality of tube elements having a pair of tanks formed at one end in the longitudinal direction and a U-shaped passage communicating the pair of tanks, and alternately with the tube elements. A plurality of tank groups are formed by communicating the fins to be stacked and tanks adjacent in the stacking direction in a predetermined range, and the tank groups and U-shaped passages corresponding to the tank groups are fluidly connected in series to form a refrigerant flow. A refrigerant inlet part communicating with a tank group located at an upstream end of the refrigerant flow path and a refrigerant outlet part communicating with a tank group located at a downstream end of the refrigerant flow path are the outermost ends in the laminating direction. In the stacked heat exchanger provided on the outer side in the stacking direction of the tube element located on one side of the section, the inlet / outlet section is fixed outward in the stacking direction of the tube element located on one of the outermost ends in the stacking direction. A first inlet / outlet forming part in which the refrigerant inlet part and the refrigerant outlet part are formed, and a refrigerant inlet passage which is face-to-face joined to the first inlet / outlet forming part in the laminating direction and communicates with the refrigerant inlet part; A second outlet forming portion forming a refrigerant outlet passage communicating with the refrigerant outlet portion (claim 1).

Therefore, according to the present invention, the inlet / outlet connected to the block type expansion valve is fixed to the outer side in the stacking direction of the tube element located at one of the outermost ends in the stacking direction, and the refrigerant inlet A first inlet / outlet forming portion in which a portion and a refrigerant outlet portion are formed; and a refrigerant inlet passage communicating with the refrigerant inlet portion and being connected to the first inlet / outlet forming portion in the stacking direction and communicating with the refrigerant outlet portion. And a second outlet forming portion forming a refrigerant outlet passage, and temporarily assembling the tube element, the fins, the first and second inlet / outlet forming portions, and the end plate by brazing in a furnace. Therefore, the above object can be achieved.

Further, in the present invention, the first entrance / exit forming portion is one of the forming plates constituting the tube element located at one of the outermost ends in the laminating direction, and (Claim 2), and the second port forming portion is formed integrally with an end plate disposed at one of the outermost ends in the stacking direction. (Claim 3). As a result, the number of parts can be reduced, and provisional assembly of the doorway can be easily performed.

Furthermore, in the present invention, it is desirable that the entrance is opened in a direction perpendicular to the laminating direction. This allows the block-type expansion valve to be mounted at one end of the stacked heat exchanger at a position perpendicular to the stacking direction, thereby improving the degree of freedom in layout.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

The laminated heat exchanger 1 shown in FIGS. 1A and 1B has a plurality of tube elements 2 (2A, 2B, 2).
C, 2D, 2E) and the fins 3 are alternately stacked, and a pair of end plates 4 and 5 are provided at both ends in the stacking direction, and the entrance 1 according to the present invention is provided at one end in the stacking direction.
0 is formed, and is formed by temporarily assembling the tube element 2, the fins 3, and the inlet / outlet portion 10 and then brazing in a furnace.
Reference numeral 20 designates a block expansion valve mounting plate for mounting a block type expansion valve (not shown), which is torch brazed at the same time as in the furnace brazing or after brazing in the furnace, and the opening of the entrance 10. It is fixed to. The plate 20 for mounting the block type expansion valve is also provided.
Has an inlet pipe portion 21 communicating with the outlet side of the block type expansion valve, and an outlet pipe portion 22 communicating with the inlet side of the block type expansion valve, and has a helical hole 23 for fixing the block type expansion valve. Are formed.

The tube element 2A of the tube element 2 is formed by joining a pair of forming plates face-to-face, and is formed at one end in the longitudinal direction and has communication ports formed on both sides in the stacking direction. Tanks 6A, 7
A, and a U-shaped passage 8 communicating the pair of tanks 6A, 7A. In addition, tube element 2B
Is a tube element disposed substantially at the center in the laminating direction, a tank 6B having a communicating port formed only on one side in the laminating direction, and a tank 7 having a communicating port formed on both sides in the laminating direction.
B and a U-shaped passage 8 communicating the tank 6B with the tank 7B. Furthermore, the tube elements 2C, 2
D is a tube element arranged at both ends in the stacking direction,
The same forming plate as the tube element 2A;
It is constituted by flat plates 17 and 18 joined to this forming plate from the outer side in the laminating direction, and has half the volume of other tube elements. Furthermore, the tube element 2E is disposed substantially at the center between the tube element 2B and the tube element 2D, has a communication port on both sides in the stacking direction, and has an extension portion 9 extending to the other tank side. 6E having
And a tank 7E having communication ports on both sides in the stacking direction, and a U-shaped passage 8 communicating the tank 6E with the tank 7E.

Thus, in the laminated heat exchanger 1, the tanks 6A, 6B, 6E on one side of the tube elements 2 adjacent in the laminating direction communicate with each other in a predetermined range,
Two tank groups 31 and 34 that are shut off by the tank 6B are formed, and the tank 7 on the other side of the tube element 2 is formed.
A, 7B and 7c are communicated to form two tank groups 32 and 33 which fluidly communicate with each other. Thereby, the tank group 31, the U-shaped passage 8 communicating the tank group 31 and the tank group 32, the tank group 32, the tank group 33 fluidly communicating with the tank group 32, and the tank group 33 communicating with the tank group 34. The U-shaped passage 8 and a refrigerant flow passage that is connected in series with the tank group 34 are configured.

As shown in FIG. 2A, the flat plate 17 of the tube element 2C constituting the tank group 34 communicates with the extension 9 of the tube element 2E constituting the tank group 31. A first through hole 41,
A second through hole 42 communicating with the tank group 34 is formed, and the first through hole 41 and the extending portion 9 are further communicated by the communication pipe 15.

The entrance 10 is, as shown in FIG.
The first port forming section 10A and the second port forming section 10B, which are a pair of forming plates, are formed by face-to-face joining, and the first port 41 and the first through port 41 in which the communication pipe 15 is fitted are formed. Refrigerant inlet passage 43 communicating
And a refrigerant outlet passage 44 communicating with the second through-hole 42.
The refrigerant inlet 45 and the refrigerant outlet 46 are opened perpendicularly to the lamination direction, and the inlet pipe 21 and the outlet pipe 22 formed in the block type expansion valve mounting plate 20 are connected to the refrigerant inlet 45 and the refrigerant, respectively. It is inserted into the outlet 46 and fixed by brazing.

The first entrance forming portion 10A is shown in FIG. 3, and is provided with an opening portion 51 which communicates with the first through hole 41 and into which the communication pipe 15 is fitted, and a second through hole forming portion 10A. An opening 52 communicating with the port 42 is formed, and a first refrigerant inlet passage forming bulge 53 defining one of the refrigerant inlet passages 43 and a first defining one of the refrigerant outlet passages 44. And a first refrigerant inlet forming bulge 55 and a first refrigerant outlet forming bulge forming one of the refrigerant inlet 45 and the refrigerant outlet 46. 56 are formed. A first brazing allowance 57 is formed around each of them.

The second entrance forming portion 10B is shown in FIG. 4 and is face-to-face joined with the first entrance forming portion 10A. The second entrance forming portion 10B is brazed to the first brazing allowance 57. A first coolant inlet passage forming bulge 63 defining the other of the coolant inlet passages 43 and a first coolant outlet defining the other of the coolant outlet passages 44 having two brazing allowances 67. A passage forming bulge 64 is formed, and a second refrigerant inlet forming bulge 65 and a second refrigerant outlet forming bulge 66 forming the other of the refrigerant inlet 45 and the refrigerant outlet 46 are formed. Is what is done.

First and second parts constituting the entrance 10
Are formed between the tube element 2C located at the end in the laminating direction and one end plate 4 together with the tube element 2, the fins 3, and the end plates 4 and 5. They are temporarily assembled and then brazed together in a furnace. Thereby, at one end of the stacking type heat exchanger 1 in the stacking direction, the refrigerant inlet 45 and the refrigerant outlet 46 of the inlet / outlet unit 1 are opened perpendicularly to the stacking direction. The block-type expansion valve can be installed perpendicularly to the stacking direction, so that even for vehicles that cannot create sufficient space in the stacking direction, there is no pipe routing and the block-type expansion valve can be installed. is there.

In the second embodiment shown in FIG. 5, a first port forming section 10A 'is formed integrally with the flat plate 17, and a second port forming section 10B' is brazed thereto. An entrance part 10 'is formed. Hereinafter, the same portions as those in the first embodiment or those having the same action as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

A first entrance / exit forming portion 10A 'according to the second embodiment is the one shown in FIG.
An opening 51 ′ which is integrally formed with the first through-hole 41 and into which the communication pipe 15 is fitted;
An opening 52 ′ communicating with the second through-hole 42 is formed, and one of the first refrigerant inlet forming bulging portion 55 ′ and one of the refrigerant outlets 46 that define one of the refrigerant inlets 45. A first refrigerant outlet forming bulging portion 56 ′ is formed.

The second entrance / exit forming portion 10B 'is formed as shown in FIG.
A brazing allowance 67 'to be brazed at a predetermined position on the flat plate 17, for forming a refrigerant inlet passage 43 which defines the refrigerant inlet passage 43 together with a flat portion of the flat plate 17. A bulging portion 63 ′ and a bulging portion 64 ′ for forming a refrigerant outlet passage that defines the refrigerant outlet passage 44 are formed, and a second refrigerant inlet forming the other of the refrigerant inlet 45 and the refrigerant outlet 46. A bulging portion 65 'and a second refrigerant outlet forming bulging portion 66' are formed.

Thus, the number of components can be reduced compared to the first embodiment while maintaining the effects of the first embodiment.

In the third embodiment shown in FIG. 8, a second entrance / exit forming portion 10B "is formed integrally with one end plate 4, and a first entrance / exit portion 10B" formed integrally with the flat plate 17 is formed. Is formed by brazing together with the entrance forming portion 10A "of the second embodiment. Hereinafter, the same portions or the same functions as those of the first and second embodiments are exerted. Those components are denoted by the same reference numerals and description thereof is omitted.

A first entrance / exit forming portion 10A "according to the third embodiment is shown in FIG. 9, and is formed integrally with the flat plate 17 as in the second embodiment. An opening 51 ″ that is in communication with the first through hole 41 and into which the communication pipe 15 is fitted, and the second through hole 4.
An opening 52 ″ communicating with the second refrigerant inlet 45 is formed, and a first refrigerant inlet forming bulging portion 55 ″ defining one of the refrigerant inlets 45 and a first defining one of the refrigerant outlets 46. A swelling portion 56 "for forming a refrigerant outlet is formed.

The second entrance forming portion 10B "
0, which is formed integrally with the one end plate 4 and has a brazing allowance 67 ″ that is brazed to a predetermined position of the flat plate 17.
A refrigerant inlet passage forming bulge 63 "that defines the refrigerant inlet passage 43 together with the flat portion of the flat plate 17 and a refrigerant outlet passage forming bulge 64" that defines the refrigerant outlet passage 44 are formed. Further, a second refrigerant inlet forming bulge 65 "and a second refrigerant outlet forming bulge 66" forming the other of the refrigerant inlet 45 and the refrigerant outlet 46 are formed.

Thus, while maintaining the effects of the first and second embodiments, the number of parts can be further reduced as compared with the second embodiment, and the temporary assembly is facilitated and the first and second embodiments are simplified. In addition, it is possible to facilitate the alignment of the position of the second entrance forming portion.

[0028]

As described above, according to the present invention,
By forming the entrance / exit portion located at one end in the lamination direction of the laminated heat exchanger by joining the first and second entrance / exit forming portions face-to-face, the block type expansion valve can be mounted perpendicularly to the lamination direction. A block type expansion valve can be mounted on a vehicle in which a sufficient space cannot be created in the stacking direction without piping.

Further, by forming the first port forming portion integrally with the flat plate constituting the tube element positioned at the end, or by forming the second port forming portion integrally with the end plate. In addition, the number of parts can be reduced, and the temporary assembling is facilitated, so that the number of working steps can be reduced.

[Brief description of the drawings]

FIG. 1A is a front view of a stacked heat exchanger according to a first embodiment of the present invention, and FIG. 1B is a bottom view thereof.

FIG. 2A is a partially enlarged view of the vicinity of a doorway portion according to the first embodiment as viewed from the outside in the stacking direction, and FIG. 2B is a partially enlarged view as viewed from the side. .

FIG. 3A is a front view of a first entrance forming portion according to the first embodiment, and FIG. 3B is a side view thereof.

FIG. 4A is a front view of a second entrance forming portion according to the first embodiment, and FIG. 4B is a side view thereof.

FIG. 5A is a partially enlarged view of the vicinity of an entrance / exit portion according to a second embodiment as viewed from the outside in the stacking direction, and FIG. .

FIG. 6A is a front view of a first entrance forming portion according to a second embodiment, and FIG. 6B is a side view thereof.

FIG. 7A is a front view of a second entrance forming portion according to the second embodiment, and FIG. 7B is a side view thereof.

FIG. 8A is a partially enlarged view of the vicinity of an entrance / exit portion according to a third embodiment as viewed from the outside in the stacking direction, and FIG. .

FIG. 9A is a front view of a first entrance forming portion according to a third embodiment, and FIG. 9B is a side view thereof.

FIG. 10A is a front view of a second entrance forming portion according to a thirty-first embodiment, and FIG. 10B is a side view thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Laminated heat exchanger 2 (2A, 2B, 2C, 2D, 2E) Tube element 3 Fin 4, 5 End plate 17 Flat plate 10, 10 ', 10 "Entrance part 10A, 10A', 10A" 1st entrance Forming part 10B, 10B ', 10B "Second entrance / exit forming part 15 Communication pipe 20 Block type expansion valve mounting plate 41 First through hole 42 Second through hole 43 Refrigerant inlet passage 44 Refrigerant outlet passage 45 Refrigerant inlet 46 Refrigerant Exit

Claims (4)

[Claims] 1. A plurality of tube elements having a pair of tanks formed at one longitudinal end and a U-shaped passage communicating with the pair of tanks, fins alternately stacked with the tube elements, and adjacent to each other in the stacking direction. A plurality of tank groups are formed by communicating a predetermined range of tanks, and a U-shaped passage corresponding to the tank group and the tank group is fluidly connected in series to form a refrigerant flow path. Stacking of a tube element in which a refrigerant inlet part communicating with a tank group located at an upstream end and a refrigerant outlet part communicating with a tank group located at a downstream end of the refrigerant flow path are located at one of outermost ends in the laminating direction. In the stacked heat exchanger provided outward in the stacking direction, the inlet / outlet portion is fixed to the outer side in the stacking direction of the tube element located at one of the outermost ends in the stacking direction, and the refrigerant inlet portion and the refrigerant outlet A first inlet / outlet forming portion formed with the first inlet / outlet forming portion in the stacking direction, a refrigerant inlet passage communicating with the refrigerant inlet portion, and a refrigerant outlet passage communicating with the refrigerant outlet portion. And a second inlet / outlet forming portion forming the second heat exchanger. 2. The molding apparatus according to claim 1, wherein the first port forming portion is one of forming plates constituting a tube element located at one of the outermost ends in the stacking direction, and is formed outside the stacking direction. The laminated heat exchanger according to claim 1, wherein the heat exchanger is integrally formed. 3. The stacked heat exchanger according to claim 2, wherein the second port forming portion is formed integrally with an end plate provided at one of the outermost ends in the stacking direction. . 4. The laminated heat exchanger according to claim 1, wherein the entrance is opened in a direction perpendicular to the laminating direction.