JP5689345B2 - Laminate heat exchanger - Google Patents

Description

  The present invention relates to a stacked heat exchanger in which a gas-liquid two-phase refrigerant path and a medium path for cooling are alternately stacked between plates, like a refrigerant evaporator.

  The heat exchanger described in the following Patent Document 1 is obtained by laminating a large number of plates and alternately laminating a gas-liquid two-phase refrigerant passage and a medium passage for cooling in the laminating direction. A refrigerant communication hole is provided at one end thereof, a bottomed refrigerant supply pipe is inserted into the communication hole, and a refrigerant supply hole is formed at a position facing each refrigerant flow path. The reason why the pipe is inserted into the refrigerant communication hole is to supply the refrigerant equally to each refrigerant flow path, and a refrigerant supply hole is provided for each flow path of the pipe.

The diameter of the refrigerant communication hole needs to be slightly larger than the diameter of the refrigerant supply pipe. Therefore, a slight gap is formed between the pipe and the refrigerant communication hole, and there is a possibility that the refrigerant moves in the axial direction of the refrigerant pipe through the gap and uneven refrigerant supply is performed.
Therefore, in order to close the gap, the invention described in Patent Document 1 is such that the pipe diameter is expanded by the supply pressure only when the refrigerant is supplied, and the outer periphery of the pipe is in contact with the hole edge. is there.

JP-A-4-309766

However, it is extremely difficult to widen the pipe diameter by the supply pressure of the refrigerant, and there is a problem in practicality.
Accordingly, an object of the present invention is to prevent refrigerant from flowing in the axial direction of the pipe from the gap even if the outer diameter of the pipe is slightly smaller than the diameter of the communication hole.

The invention according to claim 1 includes a plurality of plates (3), (4) having a pair of first communication holes (1) and second communication holes (2) arranged at the ends thereof,
Arranged between the plates (3) (4) to be stacked, a frame portion which is substantially aligned with the outer periphery thereof and having a (5), a first hole at a position aligned with said first hole end (1) A first frame (7) provided with (6);
A second hole that is disposed between the stacked plates (3) and (4) and has a frame portion (8) that is substantially aligned with the outer periphery thereof and that is aligned with the position of the second communication hole (2) at the end portion. A second frame (10) provided with (9),
Said first frame (7) and the second frame (10) are alternately arranged between each plate (3) (4), the second flow path within the frame of the first frame (7) (11) is formed in the laminated heat exchanger in which the first flow path within the frame of the second frame (10) (12) is formed to constitute a core (13),
Each plate (3) said first communication hole (4) (1) and the first medium supply pipe (14) is inserted into the first hole (6) of the first frame (7),
The diameter D ₁ of the first first hole of the frame body (7) (6), is larger than the diameter D ₂ of each plate (3) said first communication hole (4) (1), whereby between the adjacent pair of plates (3) (4) the first communication hole (1) and the first first hole of the frame body (7) (6), the labyrinth space (16) is formed, the first medium is configured to prevent the flows by the presence of the space (16) in the axial direction of the pipe (14),
The frame at both ends of the second frame (10) has a fan section (18) formed in a flat fan shape that shrinks toward the entrance / exit of the first medium (29), and the frame excluding the fan section. Inner fin (17) is interposed in the inside, spacer (20) is interposed in the fan part (18),
Both sides in the width direction of the spacer (20) are aligned with both sides (18a) of the fan part (18), and one end edge in the first medium flow direction is opposed along the outer periphery of the pipe (14). The other edge has a flat sector shape facing the edge of the inner fin (17), and a plurality of flat radial first medium distribution holes (19) are penetrated from one end edge to the other end edge. It is a featured stacked heat exchanger.

The invention according to claim 2 is the stacked heat exchanger according to claim 1,
It is a laminated heat exchanger in which the other end edge of the spacer (20) and the edge of the inner fin (17) opposite to the other end edge are both formed in an arc shape .

The present invention described in claim 3 is the laminated heat exchanger according to claim 1 or claim 2,
The pipe (14) has a plurality of ejection holes (15) at the position of each first flow path (12) and on a straight line along the axis thereof, and the first medium (29) is a gas-liquid two-phase. Phase state refrigerant,
The side of each jet hole (15) on the outer periphery of the pipe (14) is a stacked heat exchanger in which the plate (3) (4) is close to or in contact with the hole edge of the first communication hole (1) .

Layered heat exchanger of the present invention, the diameter D ₁ of the first hole 6 of the first frame 7, the plate 3, are formed than the diameter D ₂ of the first communication hole 1 of the plate 4 on a large, thereby A labyrinth space 16 is formed between the pair of adjacent plates 3, the first communication hole 1 of the plate 4, and the first hole 6 of the first frame 7. The presence of the labyrinth space 16 prevents the gas from flowing in the axial direction of the pipe 14 .
With this configuration, it is possible to form a slight gap between the outer periphery of the pipe 14 and the first communication hole 1 of each plate 3 and plate 4, thereby inserting the pipe 14 into each first communication hole 1. And bypassing the gas by-pass . Then, the first medium 29 discharged from the ejection holes 15 of the pipe 14 can be evenly distributed to the first flow path 12. This is because the labyrinth space 16 prevents the first medium 29 from moving in the axial direction of the pipe 14 after being ejected from the ejection hole 15.
Further, since the spacer 20 is interposed in the fan portion 18 of the second frame 10 and a large number of planar radial distribution holes 19 are passed through the spacer 20, the first medium 29 is equally distributed to each portion of the inner fin 17. Can be distributed .

In the above configuration, as described in claim 2, when forming the both arcuate edges of the inner fin 17 to the other end edge and opposed thereto of the spacer 20, further a first medium 29 to each part of the inner fin 17 Can be distributed evenly.
In the above configuration, as described in claim 3 , the plurality of ejection holes 15 of the pipe 14 are arranged on a straight line along the axis of the first flow path 12, and the ejection hole 15 side on the outer periphery of the pipe 14 is disposed on the plate. 3. When the plate 4 is brought close to or in contact with the edge of the first communication hole 1 of the plate 4, the first medium 29 can be effectively prevented from moving in the axial direction of the pipe 14.

The exploded perspective view of the lamination type heat exchanger of the present invention. The front view which shows the same assembly state. FIG. IV-IV sectional drawing of FIG. VV sectional drawing of FIG. VI-VI sectional drawing of FIG. FIG. 7 is an enlarged cross-sectional view taken along the line VII-VII in FIG. 3 and shows a main part of the present invention. The VIII section enlarged view of FIG. IX-IX sectional drawing of FIG. XX sectional drawing of FIG.

Next, embodiments of the present invention will be described with reference to the drawings.
The laminated heat exchanger of the present invention has a large number of plates 3 and 4 and a first frame 7 and a second frame 10 that are interposed every other one of them.
The plate 3 and the plate 4 have a substantially rectangular plane, and a pair of tongue pieces 27 project from the diagonal positions, and the second communication hole 2 is formed there. Moreover, the 1st communicating hole 1 is drilled in the center of the both ends. Except for the vicinity of the first communication hole 1 and the second communication hole 2, a large number of dimples 21 are provided on each plate. The plate 3 has a dimple 21 projecting downward and the plate 4 projecting upward.

Next, the 1st frame 7 has the outer periphery which aligns with the outer periphery of each plate 3 and 4, and a pair of 1st hole 6 is drilled in the longitudinal direction center position.
The outer periphery of the second frame body 10 is aligned with each plate, the fan-shaped fan portions 18 are provided inside both ends, and a pair of second holes 9 are formed in the pair of tongue pieces 27. Yes. The diameters of the second holes 9 and the second communication holes 2 of the plates 3 and 4 are matched.
The plates 3 and 4 are alternately stacked, and the first frame 7 and the second frame 10 are alternately interposed between the plates. Inner fins 17 and spacers 20 are interposed inside the second frame 10. Further, end plates 31 are arranged at the upper and lower ends in the stacking direction. The first communication hole 1 does not exist in the end plate 31 on the lower end side. Boss portions 22 are respectively attached to the first communication holes 1 on the upper end side.

The diameter D ₂ of the first communication hole 1 of the plate 3 and the plate 4 is smaller than the diameter D ₁ of the first hole 6 of the first frame body 7 and slightly larger than the diameter D _{3 of the} pipe 14. is there. The pipe 14 is inserted into each of the first communication holes 1 and the first holes 6. In this example, the lower end is closed, and the ejection holes 15 are formed in a row on one side. The intervals between the ejection holes 15 are arranged at the intervals between the first flow paths 12 in the second frame 10.

  Next, the thickness of the spacer 20 matches the thickness of the second frame body 10, and both widthwise sides thereof match the both sides 18 a of the fan portion 18 of the second frame body 10. Then, along the outer periphery of the pipe 14, one end side of the spacer 20 is opposed to the same gap, and the other end side has a flat sector shape along the arc surface of the edge of the inner fin 17. A large number of planar radial distribution holes 19 are penetrated from one end side to the other end side.

The parts thus formed are stacked, and the parts are brazed and fixed together. A pipe 28 for the second medium 30 is connected to the second communication hole 2 of the lowermost end plate 31.
As shown in FIG. 2, a gas-liquid two-phase refrigerant is supplied as a first medium 29 from the upper end pipe 14 to each first flow path 12, and the second medium 28 to be cooled is supplied from one lower end pipe 28. 30 is supplied to each second flow path 11, and heat exchange is performed between the first medium 29 and the second medium 30.

(Function)
The first medium 29 in the gas-liquid two-phase state is supplied to the pipe 14 in FIG. 7 and is distributed from the respective ejection holes 15 to the first flow path 12. At this time, the inner diameter of the first communication hole 1 of the plates 3 and 4 is slightly larger than the outer diameter of the pipe 14, and a slight gap is formed there. Therefore, the pipe 14 can be easily inserted into the first communication hole 1. In addition, it is preferable that the injection hole 15 side of the pipe 14 is close to or in contact with the hole edge of the first communication hole 1 and the injection hole 15 is directed to the spacer 20 side.

As shown in FIG. 9, a first manifold 34 is provided between the pipe 14 and the spacer 20, and a second manifold 35 is formed between the spacer 20 and the inner fin 17. Since the outer diameter D ₁ of the first hole 6 of the first frame 7 is formed larger than the outer diameter D ₂ of the first communication hole ₁ of the plate 3 and plate 4, A labyrinth space 16 is formed between the one communication hole 1 and the edge of the first hole 6 of the first frame body 7.

As shown in FIG. 8, the first medium 29 in a gas-liquid two-phase state supplied from the ejection holes 15 flows into the first manifold 34 and enters the first flow path 12 via the distribution holes 19 of the spacer 20. Supplied.
At this time, a part of the first medium 29 moves in the axial direction of the pipe 14 through a slight gap between the pipe 14 and the first communication hole 1 of the plates 3 and 4. However, since the labyrinth space 16 is formed at the movement destination, it is difficult for the first medium 29 to escape from the labyrinth space 16 in the axial direction. As a result, the first medium 29 hardly moves in the axial direction of the pipe 14.

  Moreover, a slight gap can be provided between the pipe 14 and the first communication hole 1 of the plate 3 and the plate 4. Therefore, the pipe 14 can be easily inserted into the first communication hole 1 through the phase flange 23 and the boss portion 22 as shown in FIG.

DESCRIPTION OF SYMBOLS 1 1st communication hole 2 2nd communication hole 3 Plate 4 Plate 5 Frame part 6 1st communication hole 7 1st frame 8 Frame part 9 2nd communication hole
10 Second frame

11 Second channel
12 First channel
13 core
14 Pipe
15 outlet
16 Labyrinth space
17 Inner fin
18 Fan
18a both sides
19 Distribution hole
20 Spacer

21 dimples
22 Boss
23 Companion flange
24 O-ring
25 Fastener
26 Nail
27 Tongue
28 pipe
29 1st medium
30 Second medium

31 End plate
32 Frame protrusion
33 Clearance
34 First manifold
35 Second manifold

Claims (3)

A plurality of plates (3), (4) having a pair of first communication holes (1) and second communication holes (2) arranged at the ends;
Arranged between the plates (3) (4) to be stacked, a frame portion which is substantially aligned with the outer periphery thereof and having a (5), a first hole at a position aligned with said first hole end (1) A first frame (7) provided with (6);
A second hole that is disposed between the stacked plates (3) and (4) and has a frame portion (8) that is substantially aligned with the outer periphery thereof and that is aligned with the position of the second communication hole (2) at the end portion. A second frame (10) provided with (9),
Said first frame (7) and the second frame (10) are alternately arranged between each plate (3) (4), the second flow path within the frame of the first frame (7) (11) is formed in the laminated heat exchanger in which the first flow path within the frame of the second frame (10) (12) is formed to constitute a core (13),
Each plate (3) said first communication hole (4) (1) and the first medium supply pipe (14) is inserted into the first hole (6) of the first frame (7),
The diameter D ₁ of the first first hole of the frame body (7) (6), is larger than the diameter D ₂ of each plate (3) said first communication hole (4) (1), whereby between the adjacent pair of plates (3) (4) the first communication hole (1) and the first first hole of the frame body (7) (6), the labyrinth space (16) is formed, the first medium is configured to prevent the flows by the presence of the space (16) in the axial direction of the pipe (14),
The frame at both ends of the second frame (10) has a fan section (18) formed in a flat fan shape that shrinks toward the entrance / exit of the first medium (29), and the frame excluding the fan section. Inner fin (17) is interposed in the inside, spacer (20) is interposed in the fan part (18),
Both sides in the width direction of the spacer (20) are aligned with both sides (18a) of the fan part (18), and one end edge in the first medium flow direction is opposed along the outer periphery of the pipe (14). The other edge has a flat sector shape facing the edge of the inner fin (17), and a plurality of flat radial first medium distribution holes (19) are penetrated from one end edge to the other end edge. A laminated heat exchanger characterized. The stacked heat exchanger according to claim 1 , wherein
A laminated heat exchanger in which the other end edge of the spacer (20) and the edge of the inner fin (17) opposed to the other end edge are both formed in an arc shape. In the laminated heat exchanger according to claim 1 or 2 ,
The pipe (14) has a plurality of ejection holes (15) at the position of each first flow path (12) and on a straight line along the axis thereof, and the first medium (29) is a gas-liquid two-phase. Phase state refrigerant,
A laminated heat exchanger in which the side of each jet hole (15) on the outer periphery of the pipe (14) is close to or in contact with the hole edge of the first communication hole (1) of each plate (3) (4).

Images