JPH0861806A - Stacked heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] A fluid introduction pipe and a fluid discharge pipe can be detachably attached to the heat exchanger body. [Structure] A large number of plates 2 and 4 each having a substantially U-shaped recess 8 for forming a fluid flow passage and front and rear header forming recesses 9 and 11 connected to both ends of the recess 8 are recessed to each other. A laminated heat exchanger laminated in layers with 9 and 10 facing each other, comprising a heat exchanger body 1, a fluid introduction pipe 23 and a fluid discharge pipe 18 attached to the heat exchanger body 1, and the heat exchanger. A pipe connecting block 26 having a fluid introducing passage 24 and a fluid discharging passage 25 respectively communicating with the adjacent fluid introducing port 19 and the fluid discharging port 17 of the main body 1, and a pipe connecting block connecting the fluid introducing pipe 23 and the fluid discharging pipe 18 to each other. It is provided with one or two attachment members 27 and the like to be attached to 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger used, for example, in an air conditioner of a vehicle.

[0002]

2. Description of the Related Art Conventionally, in a laminated evaporator used for an air conditioner of an automobile, header tanks on an inlet side and an outlet side are provided at both upper ends, and a fluid introduction pipe and a fluid discharge pipe are provided in these header tanks. Were integrally joined by welding or brazing. Also, in a laminated evaporator in which fluid inlets and outlets are provided in the upper and lower parts on one side of the evaporator main body, a fluid inlet pipe and a fluid outlet pipe are integrated into these upper and lower fluid inlets and outlets. Were joined together.

[0003]

In the case of the conventional evaporator described above, since the fluid introduction pipe and the fluid discharge pipe are integrally joined to the evaporator body, a large space is required for transporting and storing the same. Since the shape of the fluid introduction pipe and the shape of the fluid discharge pipe are different depending on the attachment conditions of the evaporator, even if the evaporator main body is the same, the fluid introduction pipe and the fluid discharge pipe can be adapted to different attachment conditions of the evaporator. It was necessary to manufacture each of the bonded parts. As a result, the number of evaporator models has increased, and production management has become complicated.

An object of the present invention is to provide a laminated heat exchanger in which a fluid introduction pipe and a fluid discharge pipe can be detachably attached to a heat exchanger body.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a large number of plates each having a substantially U-shaped recess for forming a fluid passage and front and rear header forming recesses connected to both ends of the recess are formed adjacent to each other. In a laminated heat exchanger having heat exchanger bodies stacked in layers with concave portions facing each other, and a fluid introduction pipe and a fluid discharge pipe attached to the heat exchanger body, adjacent fluid introduction ports and fluid discharge ports A pipe connection block having a fluid introduction passage and a fluid discharge passage that communicate with each other, a fluid introduction pipe and a fluid discharge pipe connected to the fluid introduction port and the fluid discharge port through the pipe connection block, and these pipes. The pipe connection block is equipped with one or two attachment members that are attached to the pipe connection block. It is fixed to the laminated heat exchanger body in a state of facing the inlet and the inlet of the fluid discharge passage facing the fluid discharge port. And a fitting portion through which the fluid introduction pipe and / or the fluid discharge pipe can be fitted is formed in the mounting member, and the inner edge portion of the fitting portion engages with the retaining projections of both pipes. It is possible that the connecting end of the pipe is inserted into the fitting part of the mounting member and the connecting end of the fluid introducing pipe is connected to the pipe connecting block. It is inserted from the upstream side port of the fluid introduction passage, the connection end of the fluid discharge pipe is inserted from the downstream side port of the fluid discharge passage of the pipe connection block, and the mounting member is attached to the outer surface of the pipe connection block by the fixing means. By being freely fixed, each pipe is connected to the fluid inlet and the fluid outlet while the retaining projection is sandwiched between the mounting member and the pipe connecting block. Is.

[0006]

According to the laminated heat exchanger of the present invention, the connecting end portions of the fluid introducing pipe and the fluid discharging pipe are inserted into the fitting portions of the mounting member, and the connecting end portions of the pipes are connected to each other. The heat exchanger body is simply inserted into the fluid introduction passage and the fluid discharge passage of the pipe connection block fixed to the heat exchanger body, and in this state, the mounting member is fixed to the outer surface of the pipe connection block by the fixing means. Each pipe can be connected to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an evaporator in an air conditioner for an automobile will be described with reference to the drawings.

In this specification, front and rear, left and right are based on FIG. 2, the upper part of the figure is referred to as the rear and the lower part is referred to as the front, and the left and right of the figure are referred to as the left and right.

A substantially U-shaped fluid flow path forming recess (8) and front and rear header forming recesses (11) and (9) connected to both ends of the fluid passage forming recess and front and rear header forming recesses (11) and (9), respectively. ) Bottom wall (11a)
Plate with fluid passage holes (14) and (13) in (9a)
(2) (4) are adjacent to each other on the left and right
1) are laminated in a state of facing each other to form parallel flat tube portions (5) and front and rear header portions (7) and (6),
A front header partition wall (16) and a rear header partition wall (15) that close the fluid passage holes (13) and (14) are provided at required locations between the left and right ends of the front and rear header parts (7) and (6). A laminated evaporator in which a meandering fluid flow path is formed, and adjacent fluid inlets
(19) and fluid outlet (17)
(24) and a pipe connection block (26) having a fluid discharge passage (25), and a fluid introduction connected to the fluid introduction port (19) and the fluid discharge port (17) via the pipe connection block (26) Pipe (23) and fluid discharge pipe (18), and both pipes
(23) (18) is equipped with a plate-shaped mounting member (27) for mounting the pipe connecting block (26), and the pipe connecting block (26)
Is the upstream side opening (25a) of the fluid discharge passageway (25) with the downstream side opening (24b) of the fluid introduction path (24) facing the fluid introduction port (19).
Is fixed to the laminated heat exchanger body (1) so that it faces the fluid discharge port (17), and the fluid introduction pipe (23) and the fluid discharge pipe (18) are pulled out to the parts near the connection end. Stop projection
(23a) (18a) is provided, and the fitting member (27) is formed with fitting portions (28a) and (28b) through which the fluid introduction pipe (23) and the fluid discharge pipe (18) can be fitted. The inner edges of the fitting portions (28a) and (28b) are engageable with the retaining projections (23a) and (18a) of the pipes (23) and (18), and the fluid introduction pipe (23) and the fluid The part of the discharge pipe (18) that is opposite to the connection end part across the retaining projections (23a) (18a) is the fitting part (28) of the mounting member (27).
a) and (28b) respectively, and the connection end of the fluid introduction pipe (23) is the fluid introduction passageway (24) of the pipe connection block (26).
The upstream end (24a) of the pipe, and the connection end of the fluid discharge pipe (18) is connected to the fluid discharge passage (2
5) is inserted from the downstream side opening (25b), and the mounting member (27) is screwed.
By being detachably fixed to the outer surface of the pipe connecting block (26) by the (30), the retaining projections (23a) and (18a) of the two pipes (23) and (18) are attached to the mounting member (27). ) And the pipe connecting block (26), they are connected to the fluid inlet (19) and the fluid outlet (17).

A rear header part (6) is provided on the rightmost plate (2a).
A fluid outlet (17) leading to the front header part and a fluid inlet (19) leading to the front header part (7) are provided respectively.
The partition wall (16) near the left end of (7) is provided with an insertion opening (22) for inserting the inner pipe (34), and front and rear header parts (6) (7)
The left end of is closed by the plate (2b).

The left end of the inner pipe (34) is inserted into the insertion port (22), and the right end of the pipe is connected to the pipe connecting block (2).
6) Fitted in the annular step portion (24c) at the downstream side opening (24b) of the fluid introduction passageway (24), and joined by brazing. With this structure, the inner pipe (34) is designed so as not to protrude outside the header.

Reference numeral (29) in the figure indicates an O-ring.

The fitting portions (28a) and (28b) of the mounting member (27) are formed into a semi-elliptical shape, and the fitting portion (28a) is provided with a fluid introduction pipe from below.
(23) is fitted, and the fluid discharge pipe (18) is fitted into the fitting portion (28b) from the side.

A screw hole (31) into which a screw (30) is inserted is formed in the center of the pipe connecting block (26), and the screw hole (31) and the screw hole (31) are formed in the center of the mounting member (27). Communication and screw (3
A circular hole (32) through which the (0) is inserted is provided. And
By fitting the screw (30) through the circular hole (32) of the mounting member (27) and fitting it into the screw hole (31) of the pipe connecting block (26), the mounting member (27) becomes a pipe connecting block. It is attached to the outer surface of (26).

As shown in FIG. 3, the pair of standard intermediate plates (4) are substantially U-shaped, each consisting of a front vertical part (8a), a rear vertical part (8b) and a horizontal part (8c) connecting them. Fluid flow path forming recesses (8) and front and rear header forming recesses (11) (9) deeper than the fluid flow path forming recesses (8) and connected to the upper ends of the front and rear vertical parts thereof. ing. The bottom walls (11a) (9a) of the recesses (11) (9) for forming the front and rear headers of the standard intermediate plate (4) have two substantially oval fluid passage holes (1
4) (13) has been opened. At the center of the fluid passage forming recess (8) of each intermediate plate (4), there is a vertically extending partitioning protrusion (20) for making the fluid passage U-shaped. )
From the upper end to the lower end. A large number of slanted ribs (12) are formed on the bottom wall of the fluid channel forming recess (8) to disturb the flow of the refrigerant in the fluid channel to improve heat transfer efficiency.

The front and rear header parts (7) and (6) are partitioned by front and rear header part partition walls (15) and (16) between the left and right ends, and each has two parts.
It is divided into two header compartments (7A) (7B) (6A) (6B). The header compartments (7A) (7B) (6A) (6B) and the flat pipe section (5) allow the first header compartment (7A) on the left side of the front header section (7) as shown by the arrow in FIG. ) From the parallel flat tubes (5) on the left side, the rear header section (6), the middle header compartment (6
A), central parallel flat tube section (5), front header section (7) right intermediate header compartment (7B), right parallel flat tube section (5), rear header section (6) right side A meandering fluid flow path leading to the final header compartment (6B) is formed.

A louver is provided between the flat tubes (5) adjacent to each other.
(21) Corrugated fin (3) is interposed. On both outer sides of the end plates (2a) (2b), side plates (10) (10)
And the corrugated fins with louvers (21) between each side plate (10) and flat tube (5).
(3) is interposed.

In the above embodiment, the mounting member (27) is configured to mount both the fluid introducing pipe (23) and the fluid discharging pipe (18). The pipe (23) and the fluid discharge pipe (18) may be separately attached.

FIG. 4 shows another embodiment of the present invention in which the right end portion of the inner pipe (34) is flared (F) and inserted into the pipe connecting block (26). The other structure is similar to that of the above embodiment.

[0020]

According to the laminated heat exchanger of the present invention, the fluid introduction pipe and the fluid discharge pipe are detachably attached to the heat exchanger body through the pipe connecting block and the attachment member, so that they can be transported or stored. Sometimes both pipes can be removed, and the required space can be significantly reduced.In addition, it is possible to install a fluid introduction pipe and a fluid discharge pipe of the same heat exchanger body in a shape corresponding to the usage conditions. Therefore, it is not necessary to manufacture various models by joining fluid introduction pipes and fluid discharge pipes having different shapes corresponding to usage conditions to the same heat exchanger body by brazing or the like as in the conventional case.

Further, only the heat exchanger body can be replaced if necessary.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a laminated heat exchanger according to the present invention.

FIG. 2 is a sectional view showing a fluid flow path of the heat exchanger.

FIG. 3 is a perspective view showing an embodiment of an intermediate plate that constitutes the heat exchanger.

FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 (2) End plate (4) Plate (8) Fluid channel forming recess (9) Rear header forming recess (11) Front header forming recess (17) Fluid outlet (18) Fluid outlet pipe (19) ) Fluid inlet (22) Through hole (23) Fluid inlet pipe (24) Fluid inlet passage (25) Fluid outlet passage (26) Pipe connection block (27) Mounting member (28a) (28b) Pipe fitting

Claims (1)

[Claims] 1. A substantially U-shaped fluid passage forming recess (8) and front and rear header forming recesses (9) (11) connected to both ends of the recess.
A large number of plates (2) (4) that are adjacent to each other on the left and right are stacked in layers with the recesses (8) (9) (11) facing each other. Heat exchanger body
In a laminated heat exchanger having a fluid introduction pipe (23) and a fluid discharge pipe (18) attached to (1), fluid introduction passages communicating with the adjacent fluid introduction port (19) and fluid discharge port (17), respectively. (24) and a pipe connection block (26) having a fluid discharge passage (25), and a fluid introduction connected to the fluid introduction port (19) and the fluid discharge port (17) via the pipe connection block (26) The pipe (23) and the fluid discharge pipe (18) and one or two mounting members (27) for mounting each of these pipes (23) and (18) on the pipe connecting block (26) are provided for pipe connection. The block (26) has a downstream inlet (24b) of the fluid introduction passageway (24) facing the fluid introduction passageway (19) and a fluid discharge passageway (2).
The upstream side port (25a) of 5) is fixed to the laminated heat exchanger body (1) with the fluid outlet port (17) facing the fluid inlet pipe (23) and the fluid outlet pipe (18). Have projections (23a) (18a) to prevent them from coming off the connection end, and insert the fluid introduction pipe (23) and / or the fluid discharge pipe (18) into the mounting member (27). Fitting part (28a) (28
b) is formed, and the inner edges of the fitting portions (28a) and (28b) are
3) It can be engaged with the retaining projections (23a) (18a) of (18), and the connecting end is sandwiched between the retaining projections (23a) (18a) of each pipe (23) (18). The part on the side opposite to the part is the fitting part of the mounting member (27)
(28a) and (28b) are respectively fitted, the fluid introduction pipe (23)
The connection end of is the fluid introduction passage of the pipe connection block (26).
Inserted from the upstream port (24a) of (24),
The connecting end of (8) is inserted from the downstream side opening (25b) of the fluid discharge passageway (25) of the pipe connecting block (26), and the mounting member (27) is fixed to the outside of the pipe connecting block (26). Each pipe (23) (18) is detachably fixed to the side surface.
With the retaining projections (23a) and (18a) sandwiched between the mounting member (27) and the pipe connecting block (26).
9) and a laminated heat exchanger adapted to be connected to the fluid outlet (17).