JPH06331297A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger which can reduce vent resistance and save an installation space, and in which an expansion valve can be mounted integrally at a desired position in accordance with a layout of its installation place by eliminating a drawing round of a piping and improving a structure of a tank. CONSTITUTION:A heat exchanging part 27 and a tank 13 which makes heat exchanging medium go into and out of each tube element 2 of the heat exchanging part 27 are formed separately. An inlet and outlet part 39 of the heat exchanging medium which communicates with the tank 13 is provided on the outermost side in a laminating direction of the tube elements 2, and a joint 28 to connect an expansion valve is provided integrally at the inlet and outlet part 39. Thus, as there is no need to draw round a piping, an installation space of a heat exchanger 1 can be minimized. Further, the joint 28 can be mounted at any desired position only by changing the structure of the inlet and outlet part 39.

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 in a vehicle air conditioner or the like, and more particularly to a heat exchanger in which a tank communicating with each tube element is formed separately.

[0002]

2. Description of the Related Art In order to adjust the position of an inlet / outlet pipe of a heat exchanger or an expansion valve according to the layout of a vehicle engine room, conventionally, an inlet / outlet pipe is taken out from the front of the heat exchanger and the pipe is laid around. In many cases, the pipes are arranged so as to avoid obstacles.

Further, in Japanese Utility Model Laid-Open No. Sho 63-159656, in a heat exchanger in which a plurality of tube elements integrally formed with a tank portion are stacked, a tank portion is provided between an end plate and an outermost tube element. Is disclosed, in which a refrigerant passage communicating with the above is provided, and an inlet / outlet pipe for the heat exchange medium is connected to the refrigerant passage.

[0004]

However, in the former case, the ventilation resistance increases due to the inlet / outlet pipe and the expansion valve connected to the inlet / outlet pipe, and it is necessary to draw the inlet / outlet pipe from the front of the heat exchanger. It has problems such as space saving.

In this respect, in the latter heat exchanger, since the inlet / outlet pipe is drawn out from the side surface by utilizing the end plate of the heat exchanger, the above-mentioned problems are not caused, but the tank portion is provided in each tube element. A brazing allowance is required to form the tank, and the tank naturally grows in size, which also does not meet the demand for space saving.

Therefore, in the present invention, it is possible to reduce the ventilation resistance and save space by improving the structure of the tank while avoiding the routing of the pipes as much as possible, and further, according to the layout of the mounting location, a desired position can be obtained. It is an object of the present invention to provide a heat exchanger to which an expansion valve can be integrally attached.

[0007]

According to the first aspect of the present invention, the heat exchange section is formed by alternately stacking the tube element and the fin in a plurality of stages to form the heat exchange medium, and the heat exchange medium flows out to the tube element. The tank to be inserted is composed of a member for forming a tank different from the constituent member of the tube element,
An inlet / outlet portion for the heat exchange medium communicating with the tank is provided at the outermost side in the stacking direction, and a joint for connecting an expansion valve is integrally provided at the inlet / outlet portion.

According to the invention described in claim 2, a tube element and fins are alternately laminated in a plurality of stages to form a heat exchange section, and a tank for flowing a heat exchange medium into and out of the tube element is provided in the tube element. The tank is formed of a member different from the above-mentioned constituent member, the tank is extended from the outermost side in the stacking direction of the heat exchange portion, and an inlet / outlet portion is provided inwardly in the extended portion. A heat exchanger characterized in that a joint for connecting an expansion valve is integrally provided in the section.

[0009]

Therefore, in any of the first and second aspects of the invention, since the tank of the heat exchanger is formed separately from the tube element, the brazing for tank formation is formed on each tube element as in the conventional case. It is not necessary to provide a margin, and since the inlet and outlet are provided on the outermost side in the stacking direction and the joint for connecting the expansion valve is integrally provided there, there is no need to circulate the pipes and the heat exchanger is installed. The required space for can be reduced. Further, by changing the structure of the inlet / outlet portion, the joint can be attached at a free position, so that the above-mentioned problem can be achieved.

In the heat exchanger having the above-mentioned structure, the heat exchange medium reaches the tank through the joint for connecting the expansion valve and the inlet / outlet portion, and when passing through each tube element, the fin is used. It exchanges heat with the passing air through it, and after heat exchange, it flows out from the tank through the inlet / outlet part and the joint.

[0011]

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

FIG. 1 and FIG. 2 show a first embodiment according to the invention described in claim 1. The heat exchanger 1 is, for example, a two-pass heat exchanger, and includes a tube element 2 and corrugated fins. 3 and 3 are alternately laminated and end plates 4 and 5 are arranged on both sides in the laminating direction, and a separate tank 13 is brazed so as to communicate with each tube element 2.

The tube element 2 includes a molded plate 6
And the molding plate 6 is joined to each other as shown in FIG.
It has a substantially rectangular shape, and a pair of opening recesses 7, 7 is formed on one end side in the longitudinal direction, and a projecting strip 8 extends from between the opening recesses to the vicinity of the other end side. A substantially U-shaped passage-forming recess 9 is formed in the opening recess 7, which leads to the opening recesses 7, 7. Also, on the other end side of this molding plate,
For example, three abutting portions 10 are formed to project outward,
The abutting portion 10 abuts on an abutting portion of a molding plate that forms an adjacent tube element, and defines the interval between the tube elements.

A tube element 2 is formed by joining the molding plates 6 and 6 facing each other, and a pair of connection ports 11 and 1 is formed from the opening recesses 7 facing each other.
1 is formed, and a U-shaped passage 12 is formed from the passage forming recesses 9 facing each other.
1 and 11 communicate with each other via a U-shaped passage 12. And the heat exchange part 27 is comprised by laminating | stacking the tube element 2 and the fin 3 by turns, Each connection port part 11 of the laminated tube element 2 forms one tank for forming the tank 13 mentioned below. Member 14
The tank 13 and the U-shaped passage 12 of each tube element 2 communicate with each other by being inserted and joined into a plurality of insertion holes 15 formed in a.

As shown in FIG. 4, the tank 13 is constructed by joining, for example, two tank forming members 14a and 14b, and one tank forming member 14a is provided along the connection port portion 11. And a plurality of insertion holes 15 into which the connection port portions 11 are inserted. The other tank-forming member 14b has an arcuate cross section having closing habits 25a and 25b at both ends.
It is adapted to be joined to the peripheral portion of one of the tank forming members 14a.

As shown in FIG. 5, the end plate 4 is formed in a substantially rectangular shape in conformity with the shape of the molding plate 6, extends linearly from the vicinity of one end to the middle, and near the end of the middle. The first concave portion 17 in which the connection hole 16 is formed, and the first concave portion 17 extending in a straight line from the vicinity of one end to the middle in parallel to the first concave portion 17, are bent at a substantially right angle so as to be an extension of the first concave portion 17, and the connection hole is formed near the end thereof. And a second recess 18 in which 19 is formed, and as shown in FIG.
By joining the flat plate 22 so as to close the recesses 17 and 18, the introduction-side passage 20 is formed by the first recess 17.
However, the outlet side passage 21 is formed by the second recess 18.

Like the end plate 4, the flat plate 22 is formed in a substantially rectangular shape in conformity with the shape of the molding plate 6, and has a flat surface, and the recess 1
Through holes 23, 24 are formed at positions facing the lower ends of 7, 18, respectively. The through holes 23 and 24 are formed so as to be aligned with the through hole 26 formed in the one closing habit 25a of the tank forming member 14b, and therefore the one tank 13 is formed.
Is communicated with the introduction-side passage 20 through the through hole 23, and the other tank 13 is communicated with the outlet-side passage 21 through the through hole 24. As a result, the through holes 26, 26 formed in the tank forming member 14b and the through hole 2 formed in the flat plate 2
An inlet / outlet portion 39 is configured by 3, 24, the introduction-side passage 20, the outlet-side passage 21, and the connection holes 16 and 19 formed in the recesses 17 and 18, respectively.

Then, each recess 17 of the end plate 4,
A block joint 28 for mounting the expansion valve is joined to the connection holes 16 and 19 formed in 18 by brazing. As shown in FIG. 7, the block joint 28 connects the heat exchange side connection portions 29 and 30 formed in the connection holes 16 and 19 of the end plate 4 with a space and the block type expansion valve (not shown). And the expansion valve side connecting portions 31 and 32 connected to the heat exchange side, and the heat exchange side connecting portions 29 and 30.
To the expansion valve side connection portions 31 and 32 through passages 33 and 3
4 are formed respectively. Then, between the through passage 33 and the through passage 34, screw holes 35, 36 for screwing the expansion valve are formed.

Therefore, the heat exchange medium (for example, the refrigerant) introduced from the expansion valve into the introduction side passage 20 through the through passage 33 of the block joint 28 passes through the through hole 23 of the flat plate 22 and the one tank 13 Enter each tube element 2
Through the U-shaped passage 12 to the tank 13 on the opposite side, from this tank 13 through the through hole 24 of the flat plate 22 into the outlet side passage 21, and through the through passage 34 of the block joint 28 to the expansion valve. Be guided. As a result, when the refrigerant flows through the U-shaped passage 12 in the tube element 2, the refrigerant absorbs the heat of the air passing between the fins via the fins 3 to be evaporated and vaporized, and cools the passing air.

To assemble the heat exchanger 1 having the above structure,
First, the tube elements 2 and the fins 3 are alternately laminated in a plurality of stages, the tank forming members 14a and 14b are combined to form the tank 13, and the tube elements 2 are connected to the insertion holes 15 of the tank forming member 14b. Insert the mouth portion 11 and apply the end plates 4 and 5 from both ends in the stacking direction. Especially for the end plate 4, the flat plate 2
2 is applied to the outermost side of the tank 13 and the heat exchanging portion 27, and the flat plate 22 is superposed and assembled, and the block joint 28 is further attached to the connection holes 16 and 19 of the end plate 4. Then, the whole may be fixed with a jig or the like, placed in a furnace and brazed.

As a result, the block joint 28 is integrally provided on the core of the heat exchanger 1, so that there is no need to circulate the pipe leading to the expansion valve, and the expansion valve can be directly attached to the heat exchanger 1. it can. Further, if the block joint 28 is provided near the center of the end plate 4 as in this embodiment, it is possible not only to cope with an obstacle on the extension line of the tank 13, but also to store the heat exchanger 1 in the storage case. When the heat exchanger 1 is composed of upper and lower members, it becomes easy to attach the heat exchanger 1 to the storage case and to draw out the pipe from the storage case.

In the above-mentioned embodiment, the case where the heat exchange medium has two passes is shown, but in the case of making a plurality of passes such as six passes, at least three tanks 13 are required. In this case, as shown in FIG.
6 are formed in two tanks according to the path of the heat exchange medium, and the through holes 23 and 24 of the flat plate 22 are also formed in the tank 1.
It is formed according to the position of the through hole 26 of No. 3. In addition, the connection holes 16 and 19 of the introduction-side passage 20 and the discharge-side passage 21.
Need to be formed in accordance with the pitch of the through passages 33, 34 of the block joint 28, so in this embodiment, the vicinity of the upper end of one passage (introduction side passage 20) is the other passage (outlet side passage). 21) Bent away from.

The block joint 28 is properly installed by changing the configuration of the inlet / outlet portion 39, that is, by changing the shapes of the inlet passage 20 and the outlet passage 21 and the connecting position of the block joint 28. It is variable and the expansion valve can be mounted in a proper position so as to avoid obstacles.

As an example, what is shown in FIGS. 9 and 10 is a tank forming member 14 constituting the tank 13.
The block joint 28 is directly brazed to b. In the above-described embodiment, the block joint 28 is provided at the center of the end plate 4 in order to avoid obstacles, but when there is no obstacle on the extension line of the tank 13, it is as in this embodiment. Block joint 28 to tank 1
3 may be provided, and by doing so, the introduction side and the discharge side passages 20 and 2 of the flat plate 22 and the end plate 4 are provided.
1 and the like are not necessary, the number of parts can be reduced, the number of assembling steps can be reduced, and the passage resistance between the tank 13 and the block joint 28 can be reduced.

In this embodiment, the entrance / exit portion 39
Is formed by the through hole 26 of the tank forming member 14b, and in particular, the case where two tanks 13 are provided is shown. However, even when three tanks 13 are provided, the block joint 28 is provided for tank forming. It goes without saying that the member 14b may be integrally brazed.

FIGS. 11 to 13 show an embodiment of the heat exchanger 1 according to the second invention. In this embodiment, the tank 13 projects from the outermost side of the heat exchange section 27 in the stacking direction, The point that an inflow port 39 that faces the inside is formed in the protruding tank 13 is greatly different from the above-described embodiments.

More specifically, as shown in FIG. 14, in the end plate 4, a first recess 17 and a second recess 18 are provided so as to project from the lower edge of the end plate 4 in the figure, and the parts thereof are formed. Is opened downward. Further, the flat plate 22 is processed according to the shape of the end plate 4, and in particular, a recess 40 is formed in a portion facing the first recess 17 and the second recess 18.

The inlet / outlet portion 39 has a notch hole 38 formed in the protruding portion of the tank forming member 14a, and
The end plate 4 and the flat plate 22 are combined to form an introduction-side passage 20 and an outlet-side passage 21 having one end protruding and opened, and the open ends of the introduction-side passage 20 and the outlet-side passage 21 are inserted into the cutout holes 38. It is composed by brazing.

Even in such a configuration, the heat exchange medium (for example, refrigerant) introduced from the expansion valve into the introduction side passage 20 through the through passage 33 of the block joint 28 enters the tank 13 and enters each tube element 2. It reaches the tank 13 on the opposite side through the U-shaped passage 12, enters the outlet passage 21 from this tank 13, and is guided to the expansion valve via the through passage 34 of the block joint 28. As a result, when the refrigerant flows through the U-shaped passage 12 in the tube element 2, the fin 3
The heat of the air passing through the fin 3 is absorbed through the vaporization to be vaporized and evaporated, and the passing air is cooled.

Various other configurations are conceivable for the inlet / outlet portion 39. As shown in FIG. 15, the inlet / outlet portion 39 is not formed by the end plate, and the pipe is formed in the notch hole 38 of the tank forming member 14a. 37 may be connected to form a block joint 28 for connecting an expansion valve.
May be brazed directly to the tip of the pipe 37.

Further, the inlet / outlet portion 39 may be constituted by only the notch hole 38 of the tank forming member 14a. In this case, the block joint 28 is directly connected to the notch hole 38 as shown in FIG. It is fitted and brazed. When the block joint 28 is directly connected as described above, the end plate and the pipe are not required as described above, the number of parts can be reduced, the number of assembling steps can be reduced, and the passage resistance between the tank 13 and the block joint 28 can be reduced. It also has the advantage that it can be reduced.

Further, as shown in FIGS. 17 and 18, two tank forming members 14c and 14d each having a bay-shaped recess 41 formed on a flat plate are combined to form three tanks 13 extending in the stacking direction. Of these, two of the tanks are extended from the heat exchange portion 27, the extended portion is made flat, and one of the flat portions 42 is connected to the block joint 2
8 is extended in a direction perpendicular to the tank 13 in accordance with the pitch of the through passages 33 and 34, and the block joint 2 is formed on the surface of the flat portion 42.
You may make it form the notch hole 38 which connects 8.

[0033]

As described above, according to the inventions of claims 1 and 2, since the tank of the heat exchanger is formed separately from the tube element, each tube element is used for tank formation. Since it is not necessary to provide a brazing allowance, the space can be saved. Also, since the inlet and outlet are provided at the outermost side in the stacking direction and the joint for connecting the expansion valve is integrally provided there, there is no need to circulate the pipes, space can be saved and ventilation resistance can be reduced. .

Furthermore, since the joint can be mounted at any desired position by changing the structure of the inlet / outlet portion, the expansion valve can be integrated with the heat exchanger and the layout of the mounting location of the heat exchanger can be changed. Can be installed in the optimum position.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a heat exchanger according to the invention of claim 1.

FIG. 2 is an exploded perspective view showing the vicinity of an inlet / outlet portion of the heat exchanger in FIG.

FIG. 3 is a front view showing a forming plate forming a tube element of the heat exchanger in FIG.

FIG. 4 is a perspective view showing a tank forming member of the heat exchanger in FIG.

5 (a) is a front view showing an end plate of the heat exchanger in FIG. 1, and FIG. 5 (b) is a side view of the end plate.

6 is a cross-sectional view of the vicinity of the inlet / outlet part as viewed from below by horizontally cutting the tank of the heat exchanger in FIG.

7 shows a block joint of the heat exchanger in FIG. 1, (a) is a side view and (b) is a front view.

FIG. 8 is an exploded perspective view showing a second embodiment of the heat exchanger according to the invention of claim 1.

FIG. 9 is an exploded perspective view showing a third embodiment of the laminated heat exchanger according to the invention of claim 1.

10 is a cross-sectional view of the vicinity of the inlet / outlet part as viewed from below with the tank of the heat exchanger in FIG. 9 cut horizontally.

FIG. 11 is a front view showing a first embodiment of the laminated heat exchanger according to the invention of claim 2.

12 is a vertical cross-sectional view showing the vicinity of the inlet / outlet portion of the heat exchanger in FIG.

13 is a cross-sectional view of the vicinity of the inlet / outlet part as viewed from below with the tank of the heat exchanger in FIG. 11 cut horizontally.

14 (a) is a front view showing an end plate of the heat exchanger in FIG. 11, and FIG. 14 (b) is a side view of the end plate.

FIG. 15 is a sectional view showing a second embodiment of the heat exchanger according to the invention of claim 2.

FIG. 16 is an exploded perspective view showing a third embodiment of the heat exchanger according to the invention of claim 2.

FIG. 17 is an exploded perspective view showing a fourth embodiment of the heat exchanger according to the invention of claim 2.

FIG. 18 is a side view showing a state before connecting the block joints of the heat exchanger in FIG. 17.

[Explanation of symbols]

 1 Heat Exchanger 2 Tube Element 3 Fins 4,5 End Plate 13 Tanks 14a, 14b Tank Forming Member 27 Heat Exchange Section 28 Joint 39 Entrance / Exit Section

Claims (2)

[Claims] 1. A tank for forming a heat exchange part by alternately stacking tube elements and fins in a plurality of layers to form a heat exchange medium into and out of the tube element, the tank being different from a constituent member of the tube element. A heat exchanger characterized by comprising a member, an inlet / outlet portion of a heat exchange medium communicating with the tank being provided on the outermost side in the stacking direction, and a joint for connecting an expansion valve to the inlet / outlet portion being integrally provided. . 2. A tank for forming a heat exchange portion, wherein a tube element and fins are alternately laminated in a plurality of stages to form a heat exchange medium, and a heat exchange medium flows into and out of the tube element, which is different from a constituent member of the tube element. In order to connect the expansion valve to this inlet / outlet portion, the tank is formed of a member and the tank is extended from the outermost side in the stacking direction of the heat exchange portion, and an inlet / outlet portion is provided inwardly in the extended portion. A heat exchanger characterized in that the joint of is integrally provided.