JP2002031494A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger for improving piping operation and the working efficiency of maintenance, by miniaturizing piping and installation spaces and connecting the inlet/outlet pipe of fluid to a header pipe in a concentrated manner. SOLUTION: In the heat exchanger 1, a plurality of chambers are divided in the axial direction in the header pipes 2 and 32 for communicating with the inlet/outlet of a plurality of tubes 12, inlet/outlet pipes 24 and 25 are connected to the blocking end of the header pipes which communicate with the chambers, and the inlet/outlet pipes are connected to one location of the header pipes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger which is convenient for piping work and maintenance.

[0002]

2. Description of the Related Art Conventionally, some condensers as heat exchangers installed in vehicle air conditioners are disclosed in, for example,
As disclosed in Japanese Patent No. 34466, a pair of header pipes are disposed on the left and right sides, a refrigerant inlet / outlet pipe is connected to the upper and lower ends thereof, and a number of refrigerant tubes are disposed in parallel between the header pipes. Are known.

The conventional heat exchanger requires a large installation space because the front shape of the condenser is rectangular, making it difficult to install the heat exchanger in accordance with the condition of the engine room. Since the pipes are separately connected to the upper and lower positions of the header pipe, it has been extremely difficult to perform the piping work and maintenance of the refrigerant pipe in a densely packed engine room as in recent times.

[0004] For this reason, in the heat exchanger disclosed in Japanese Patent Application Laid-open No. Hei 2-40495, a header pipe is disposed at a central position of a condenser, and the inside of the pipe is divided into an inlet header and an outlet header. The pair of inlet / outlet tubes communicate with each other, and the refrigerant flow path is formed in a plane U-shape. On the other hand, the inlet / outlet pipes are connected to the upper and lower ends of the header pipe, and the length of the inlet / outlet tube is attached to the header pipe. The front shape of the capacitor is made different depending on the height.

[0005]

However, in this case,
Since a pair of entrance and exit tubes are arranged before and after on the peripheral surface of the header pipe, it is possible to sufficiently increase the diameter of the header pipe and increase the width of the condenser in the front-rear direction, and sufficiently reduce the installation space. In addition, since the inflow and outflow pipes are separately connected to the upper and lower ends of the header pipe, there has been a problem that the workability of piping and maintenance of the refrigerant conduit is poor.

The present invention solves such a problem and can sufficiently reduce the piping space and installation space, and also connects the fluid inlet / outlet pipes to the header pipes in a concentrated manner to perform the piping work and maintenance. It is an object of the present invention to provide a heat exchanger that can improve the workability of the heat exchanger.

[0007]

SUMMARY OF THE INVENTION Therefore, a heat exchanger according to the present invention has a plurality of chambers axially partitioned inside a header pipe communicating with inlets and outlets of a plurality of tubes, and a header pipe communicating with the chambers. In a heat exchanger in which an inlet / outlet pipe is connected to the closed end of the heat exchanger,
For example, by connecting to the same side end, the piping space and installation space can be made compact, and the connection of the inlet and outlet pipes can be easily and quickly performed, so that the workability of piping work and maintenance can be improved. Things.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment in which the present invention is applied to a condenser as a heat exchanger provided in a vehicle air conditioner. As shown in FIG. 4 (a), the pipe 2 is made of an aluminum molded material having a substantially elliptical cross section, and the partition walls 3 and 4 are integrally formed therein. Then, the inside of the pipe is axially partitioned into three chambers, a fluid inlet chamber, a fluid inlet / outlet port, and a liquid storage chamber.

That is, on the upper part of the header pipe 2,
A fluid inlet chamber 5a, a fluid outlet chamber 6a, and a liquid storage chamber 7 are provided, a lower end of the fluid inlet chamber 5a is closed by a partition plate 8, and the liquid storage chamber 7 communicates with the header pipe 2 vertically. are doing.

A fluid inlet chamber 5b communicating with the fluid outlet chamber 6a, a fluid outlet chamber 6b whose upper end is closed by a partition plate 9, and a liquid reservoir chamber 7 are arranged at an intermediate portion of the header pipe 2.
The lower end of the fluid inlet chamber 5b is closed by a partition plate 10.

Further, a fluid inlet chamber 5c communicating with the fluid outlet chamber 6b is provided at a lower portion of the header pipe 2, and a partition plate 1 is provided at an upper end thereof.
A fluid outlet chamber 6c closed at 1 and a liquid storage chamber 7 are provided, and a lower portion of the fluid outlet chamber 6c communicates with the liquid storage chamber 7.

In this case, as described above, the header pipe 2
Is composed of a plurality of members of a rectangular tubular shape member 2a and semicircular tubular end members 2b and 2c disposed on both sides thereof, as shown in FIG. It is also possible.

On the peripheral surface of the header pipe 2, a plurality of substantially U-shaped flat tubes 12 are protruded, and the length of the tubes 12 from the uppermost portion to the middle portion is formed to be the same. The length of the tube 12 from the middle part to the lowermost part is gradually reduced, and these bent parts are supported by a substantially rectangular end plate 13 so that the front shape of the capacitor core is formed in an irregular shape. The radiation fins 14 are disposed between the tubes 12.

The two ends of the tube 12 have slightly different lengths, and one end on the short side of the tube 12 has a fluid inlet chamber 5a,
5b and 5c, the other ends of which are connected to the fluid outlet chambers 6a and 6c.
b, 6c.

The upper and lower ends of the header pipe 2 are caps 1
The cap 16 is formed of a thick oval plate, and a pair of through holes 17 and 18 are formed in the plate surface.
And a screw hole 19 are formed, and a connecting plate 20 is connected to the cap 16.

The connecting plate 20 is formed of a plate having substantially the same thickness as the cap 16, and a pair of through holes 21 and 22 and a bolt insertion hole 23 are formed in the plate surface. Doorway tubes 24 and 25 are inserted.

One end of the inlet pipe 24 communicates with a compressor (not shown), and one end of the outlet pipe 25 communicates with an expansion valve (not shown). The pipes 17 and 18 are airtightly and liquid-tightly inserted, and flanges 26 and 27 are protruded from the ends of the pipes. These flanges 26 and 27 are provided at the edges of the through holes 17 and 18 and the through holes 21 and 22. Is engaged.

In the figure, reference numeral 28 denotes a bolt, and the bolt insertion hole 23
And screwed into the screw hole 19. 29 is a spring washer, 30 is a washer, and 31 is a condensate retained in the liquid outlet chamber 7.

FIGS. 5 to 9 show another embodiment of the present invention, and the same reference numerals are used for components corresponding to those of the above-described embodiment.

Of these, the specific examples shown in FIGS.
Instead of a single header pipe 2, two header pipes 2, 32 are provided, one of which is shown in FIG.
As shown in (a), it is made of an aluminum molded material having an approximately elliptical cross-section, and a partition wall 3 is integrally formed therein to divide the inside of the pipe into two chambers instead of the three chambers as described above. ing.

That is, on the upper part of the header pipe 2,
A fluid inlet chamber 5a and a liquid reservoir chamber 7 are provided, and a fluid inlet chamber 5b whose upper half also serves as a fluid outlet chamber 6b and a liquid reservoir chamber 7 are disposed in the middle thereof, and a fluid outlet chamber is further provided at a lower portion. A chamber 6c and a liquid storage chamber 7 are provided, and these communicate with each other at the lower end of the header pipe 2.

In this case, as described above, the header pipe 2
Instead of a single member as a single member, as shown in FIG. 7 (b), it is constituted by a two-member tubular tubular member 2a having a substantially D-shaped cross section and a semicircular tubular end member 2b joined thereto. It is also possible.

On the other hand, the other header pipe 32 is divided into upper and lower parts by a partition plate 33 disposed at a middle and high part. The upper and lower chambers 32a and 32b both function as a fluid outlet chamber in the upper half, and the lower half in the lower half. The part also serves as a fluid inlet chamber.

A large number of flat tubes 12 are provided between the header pipes 2 and 32, and one ends of the tubes 12 communicate with the fluid inlet chambers 5a and 5b and the fluid outlet chamber 6c of the header pipe 2, respectively. The ends are the upper and lower chambers 32a, 32
b.

The cap 16 has two connecting plates 20.
a and 20b are attached, these are formed in a substantially oval shape as shown in FIG. 8, the ends of the entrance / exit pipes 24 and 25 are inserted into the through holes 21 and 22, and the outer surfaces thereof are brazed or the like. After fixing, the entrance / exit pipes 24, 25 and the connecting plates 20a, 20
b and the outlet pipes 24 and 25 can be quickly mounted, and can be mounted individually to respond to the progress of assembling the compressor and the seabar tank. It features a point.

A shaft cylinder 34 is provided at the lower opening edge of the through holes 21 and 22 so as to be inserted into the through hole 17.

Another embodiment shown in FIG. 9 has a header pipe 2 only on one side, and a fluid inlet chamber 5, a fluid outlet chamber 6, and a liquid reservoir chamber 7 inside partition walls 3 and 4 inside. Are vertically divided, and the fluid outlet chamber 6 and the liquid reservoir chamber 7 are communicated at the lower end to simplify the configuration, while a plurality of meandering tubes 12 are provided, and one end thereof is connected to the fluid inlet. It is characterized in that it is inserted into the chamber 5 and the other end is inserted into the fluid outlet chamber 6 to simplify the structure.

In this case, the attachment of the inlet / outlet pipes 24, 25 may employ any of the methods described above.

In the heat exchanger constructed as described above, in the case shown in FIGS. 1 to 4, since it is constituted by a single header pipe 2, it is applied to the pipe as compared with a case where a pair of header pipes is required. Machining is reduced, manufacturing costs can be reduced, and weight reduction is promoted.

In this case, the header pipe 2 is a tube 1
Since the tube has a long elliptical cross section on two sides, and a U-shaped tube 12 is provided on the front side, the cross section of the header pipe is a perfect circle, and a pair of tubes is attached to the pipe in the front-rear direction. It is possible to reduce the diameter of the header pipe 2, reduce the width of the capacitor core in the front-rear direction, and further reduce the space for installing the capacitor.

As will be described later, the liquid storage chamber 7 in the header pipe 2 functions in the same manner as the receiver tank.
Since there is no need to separately install a receiver tank and no bracket for mounting the receiver tank, the number of parts is reduced and the weight is reduced, and the complexity of the mounting operation is eliminated.

Further, as shown in FIG. 1, the front end shape of the capacitor core is formed in such a manner that one corner at the lower end is cut out to be irregularly shaped. And suitable for installation in a densely packed engine room as in recent times.

On the other hand, the cap 16 is provided with through holes 17 and 18.
After the screw hole 19 is formed, it is held at the upper end of the header pipe 2 by an appropriate means such as a clip and brazed together with other caps 15, tubes 12, heat radiation fins 14, end plates 13, and the like.

After attaching the cap 16 and the like,
The condenser 1 is installed at a predetermined position in the engine room.

In this case, since the connecting portions of the inlet / outlet pipes 24 and 25 are provided collectively at the upper end of the header pipe 2, the connecting portions are different from those provided separately above and below the header pipe. There is no need to secure a piping space around the pipe, and the installation space is correspondingly reduced.

Next, after installing the condenser 1, the entrance / exit pipe 2
When the connection plates 4 and 25 are to be connected, the connecting plate 20 and the entrance / exit tubes 24 and 25 are previously assembled integrally via the flange portions 26 and 27, and one end of the entrance / exit tubes 24 and 25 is connected to the through holes 17 and 18.
Then, when the connecting plate 20 is engaged with the flanges 26 and 27, the bolt 28 is inserted into the bolt insertion hole 23, and the bolt 28 is screwed into the screw hole 19 of the cap 16 and tightened.

As described above, according to the present invention, the entrance / exit tube 24,
25 can be installed at one time, so that they can be installed easily and quickly as compared to the conventional ones which are separately arranged, and at that time, the entrance / exit pipes 24 and 25 are installed at one place at the upper end of the header pipe 2. Therefore, good workability can be obtained without being forced to work unnaturally.

In addition, since a single connecting plate 20 and bolts 28 and the like are sufficient for the above mounting, the number of parts is small, and the bolt 28 can be tightened only once.
The labor and labor burden of the above work are reduced.

Therefore, even in the maintenance work of the condenser 1 and the like, even when the entrance / exit pipes 24, 25 need to be removed, the entrance / exit pipes 24, 25 can be easily and quickly removed under a favorable working environment. Since there is no need to remove the associated device, maintenance work can be performed easily and efficiently.

In the condenser 1 installed as described above, high-temperature and high-pressure refrigerant gas flows from the compressor into the fluid inlet chamber 5a of the header pipe 2 through the inlet pipe 24 in accordance with the air conditioning operation of the vehicle.

The refrigerant gas is pushed out from the fluid inlet chamber 5a into the tube 12 as shown by the arrow in FIG. 2, and after being bent at the bent portion on the end plate 13 side, moves to the header pipe 2 side, and moves like this. During the process, heat exchange is performed and liquefaction starts gradually, and the gas-liquid mixed refrigerant is returned to the fluid outlet chamber 6a.

The mixed refrigerant moves downward in the fluid outlet chamber 6a, is guided to the fluid inlet chamber 5b, is pushed out of the chamber 5b again into the tube 12, turns the bent portion on the end plate 13 side and turns the header pipe 2 back. Side, and most of the gas-liquid mixed refrigerant is liquefied in such a moving process and returned to the fluid outlet chamber 6b.

The mixed refrigerant moves downward in the fluid outlet chamber 6b, is guided to the fluid inlet chamber 5c immediately below the fluid inlet chamber 5b, and is further pushed out from the chamber 5c to the tube 12 to bend on the end plate 13 side. After the part is turned over, it moves to the header pipe 2 side, is completely liquefied in such a moving process, and the liquid refrigerant is returned to the fluid outlet chamber 6c.

The liquid refrigerant flows into the liquid storage chamber 7 from the lower end of the fluid outlet chamber 6c and stays there. After filling the chamber 7, it is pushed out from the outlet pipe 25 and moves toward the expansion valve.

As described above, since the liquid storage chamber 7 stores the liquid refrigerant and supplies a fixed amount of the liquid refrigerant to the refrigeration cycle, it functions in the same manner as the receiver tank, and therefore, it is not necessary to provide a receiver tank.

[0046]

According to the heat exchanger of the present invention, as described above, since the inlet / outlet pipe is connected to one location of the header pipe, the space for piping and installation can be reduced. It is suitable for installation in the engine room of such a densely-populated automobile, and has the effect of improving the workability of the piping work and maintenance by being able to easily and quickly connect the entrance and exit pipes. is there.

[Brief description of the drawings]

FIG. 1 is a front view showing a specific example of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the present invention.

FIG. 3 is an enlarged perspective view showing a main part of the present invention.

FIG. 4A is a cross-sectional view of the header pipe taken along the line AA of FIG.
(B) is sectional drawing which shows other forms of a header pipe.

FIG. 5 is a front view showing another specific example of the present invention.

FIG. 6 is a cross-sectional view illustrating a main part of another specific example.

FIG. 7A is a cross-sectional view of the header pipe taken along the line AA of FIG.
(B) is sectional drawing which shows other forms of a header pipe.

FIG. 8 is an enlarged perspective view showing a main part of another specific example.

FIG. 9 is a front view showing still another specific example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 32 Header pipe 5a, 5b, 5c Fluid inlet chamber 6a, 6b, 6c Fluid outlet chamber 7 Liquid storage chamber 12 Tube 24 Inlet pipe 25 Outlet pipe

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[Procedure amendment]

[Submission date] July 18, 2001 (2001.7.1)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

[SUMMARY OF To this end, the heat exchanger of the present invention, in the heat exchanger having a header pipe of entrance communicating with a plurality of tubes, said header pipe
Inside, there is an entrance chamber communicating with the entrance pipe and an exit chamber.
The chamber is partitioned by a partition member, and the inlet chamber and the outlet
Is a heat exchanger that communicates with the inlet / outlet pipe. Also book
The invention is characterized in that the entrance pipe is attached to the header pipe.
A heat exchanger provided in the connecting member. In addition,
Ming, the inlet / outlet pipe is screwed to the connecting member for heat exchange
It is a vessel. Further, the present invention also provides an inlet / outlet pipe.
A passage and an exit passage are provided near the partition member.
Heat exchanger. The present invention also provides a header
The pipes are provided at both ends of the plurality of tubes.
A partition is provided in the header pipe to
Formed in a parallel flow type
The inlet chamber and the outlet chamber are connected to one header
It is a heat exchanger provided in Ip. As a result, the piping space and the installation space can be made compact, and the connection of the inlet and outlet pipes can be easily and quickly performed, so that the workability of the piping work and maintenance can be improved.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction contents]

[0046]

According to the heat exchanger of the present invention, as described above, the header pipe communicating with the entrances and exits of the plurality of tubes is provided.
In the heat exchanger provided with:
In addition, an entrance room and an exit room
Partitioned by a partition member, the entrance chamber and the exit chamber
Is a heat exchanger communicating with the inlet / outlet pipe. INDUSTRIAL APPLICABILITY The present invention is suitable, for example , for installing an engine room of an automobile in a densely populated area such as recently, and connecting an entrance pipe to, for example, a connecting member.
If provided, the pipes can be connected easily and quickly, so that the pipe work and maintenance workability can be improved.

Claims (1)

[Claims] 1. A heat exchanger in which a plurality of chambers are axially partitioned inside a header pipe communicating with entrances and exits of a plurality of tubes, and an entrance / exit tube is connected to a closed end of the header pipe communicating with the chambers. A heat exchanger wherein an inlet / outlet pipe is connected to one portion of a header pipe.