JPH10170097A - Laminated evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make uniform the indoor cooling temperature by eliminating lateral unbalance of the air passed through an evaporator. SOLUTION: A first collective plate 2 in the center defines upper half channel groups 13A, 13B, lower half channel groups 19A, 19B, upper front and rear headers 12A, 12B, and lower front and rear headers 18A, 18B, 20A, 20B. A second collective plate 3 on the left side defines a turn side channel group 16 and turn side upper and lower headers 15. A third collective plate 4 on the right side defines an inlet/outlet side channel group 22, an inlet/outlet side upper and lower headers 21, 23, and an inner pipe part 11. A refrigerant introduced into the inner pipe part 11 is passed through the upper half channel groups 13A, 13B, the turn side channel group 16, the lower half channel groups 19A, 19B, and the inlet/outlet side channel group 22 before being discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated evaporator used for a car air conditioner or the like.

[0002] In this specification, left and right refer to the rear, and the side where the entrance is provided is called right, and the opposite side is called left.

[0003]

2. Description of the Related Art Conventionally, a laminated type evaporator has a large number of U-shaped recesses for forming a flow path, and a plurality of recesses for forming front and rear headers connected to both ends thereof and having a bottom wall formed with a refrigerant passage hole. The plates are alternately overlapped with the direction of the concave portion changed so as to form a parallel U-shaped flow path and front and rear headers, and refrigerant is introduced from the right end side of the front header portion to near the left end in the header. While the pipe is inserted, the rear header portion and the front header portion are connected to the left end portion of the rear header portion via the U-shaped flow path from the left end portion of the front header portion to the left end of the rear header portion. It is known that the front and rear headers are partitioned so that meandering refrigerant flow paths that flow sequentially and alternately through a U-shaped flow path are formed.

[0004]

In the conventional laminated evaporator, the temperature of the refrigerant near the left end where the refrigerant is introduced is relatively low, and the refrigerant near the right end where the refrigerant is discharged is located. Is relatively high. Therefore,
When this is used as a car air conditioner, there has been a problem that left and right imbalance occurs, for example, that the passenger side is too cold and the driver side is not sufficiently cooled.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated evaporator that eliminates the left-right unbalance of the refrigerant temperature in the evaporator, thereby eliminating the left-right unbalance of the air passing through the evaporator and making the cooling temperature in the room uniform. To provide.

[0006]

According to the first aspect of the present invention, there is provided a laminated evaporator comprising: a U-shaped concave portion for forming a flow path; and an upper front and rear portion having a bottom wall connected to both ends thereof and having a refrigerant passage hole. A header forming recess is provided in the upper half, and a lower front and rear header forming recess having a bottom wall with a refrigerant passage hole connected to both ends of the inverted U-shaped recess for forming a flow path and both ends thereof is provided in the lower half. U-shaped upper half flow path group, inverted U-shaped lower half flow path group, U
A first plate assembly forming upper and lower headers connected to both ends of the upper U-shaped flow path group and lower front and rear headers connected to both ends of the inverted U-shaped lower half flow path group; A plurality of second plates provided with a U-shaped recess and upper and lower header forming recesses connected to the upper and lower ends thereof and having a bottom wall with a refrigerant passage hole are alternately superposed and joined by changing the direction of the recesses. The upper and lower headers of the first plate assembly are provided with an I-shaped flow path group and a second plate assembly forming upper and lower headers connected to the upper and lower ends thereof. The right end opening is a refrigerant inlet to the upper half flow path group, and one of the left end openings of the upper front and rear headers is a refrigerant outlet from the upper half flow path group, and one of the lower front and rear headers. One of the left end openings connects to the lower half flow path group. A medium inlet, one of the right end openings of the lower front and rear headers serves as a refrigerant outlet from the lower half flow path group, and the refrigerant passage hole of the upper header forming concave portion of the second plate has a second passage. The right end opening of the upper header of the plate assembly is provided so as to coincide with the refrigerant outlet from the upper half flow path group, and the refrigerant passage hole of the lower header forming recess of the second plate is provided at the right end opening of the lower header. Are provided so as to coincide with the refrigerant inlet to the lower half flow path group.

[0007] The upper front and rear headers and the lower front and rear headers are provided with one or more partitions as necessary.
The partition is a first plate for partition among a plurality of first plates.
A plate can be easily obtained by not forming a coolant passage hole in the bottom wall of the header forming recess. The refrigerant inlet to the upper half flow path group, the refrigerant outlet from the upper half flow path group, the refrigerant inlet to the lower half flow path group, and the refrigerant outlet from the lower half flow path group are provided with or without partitions. Depending on the number of headers, it is determined which header is provided before or after.

According to the stacked evaporator of the first aspect of the present invention,
The refrigerant introduced from the refrigerant inlet to the upper half flow path group is the first refrigerant.
After flowing to the left in the upper half flow path group of the plate assembly and turning in the second plate assembly, it flows to the right in the lower half flow group of the first plate assembly to form the lower half flow path The refrigerant exits from the group.

[0009] The refrigerant flows as described above and cools the air introduced into the room during that time, and the refrigerant itself becomes high in temperature. Therefore, the temperature of the refrigerant is set to the right half, the left half, the I-shaped flow group of the second plate assembly, and the lower half of the first plate assembly in the upper half flow passage group of the first plate assembly. The height is higher in the order of the left half and the right half of the channel group. Therefore, considering the right half and the left half of the evaporator, the right half contains a very low temperature fluid immediately after being introduced and a very high temperature fluid immediately before being discharged. In the half, a fluid that flows through the upper flow path group and becomes slightly hotter, and a fluid that flows through the lower flow path group and becomes hotter but has a lower temperature than immediately before it is discharged, is mixed. The average refrigerant temperature in the left half of the vessel and the average refrigerant temperature in the right half of the evaporator become substantially equal. Therefore, even when this is used as a car air conditioner, for example, air that has passed through the left half of the evaporator is blown to the driver's seat side and air that has passed through the right half of the evaporator is blown to the passenger's seat side, air is blown Since the air temperature is substantially equal between the left and right sides, there is no left and right imbalance that the passenger side is too cold and the driver side is not sufficiently cooled.

According to a second aspect of the present invention, there is provided a laminated evaporator according to the first aspect of the present invention, wherein an I-shaped concave portion for forming an inlet / outlet-side flow path and a bottom portion connected to upper and lower ends of the concave portion and having a refrigerant passage hole. A plurality of third plates provided with entrance-side upper and lower header forming recesses having walls are alternately superposed and joined while changing the direction of the recesses, thereby forming an entrance-side I-shaped flow path group and the same. Further comprising a third plate assembly forming entrance-side upper and lower headers connected to the upper and lower ends of the third plate, the third plate being located above the I-shaped recess and having the same depth as the upper and lower header forming recesses. And, by further providing an inner pipe portion forming recess having a bottom wall with a refrigerant passage hole, an inner pipe portion extending left and right is formed in the third plate assembly,
The refrigerant passage hole of the inner pipe portion forming recess is provided so that the left end opening of the inner pipe portion coincides with the refrigerant inlet to the upper half flow path group, and the refrigerant passage hole of the inlet / outlet side lower header forming recess is: The left end opening of the entrance-side lower header is provided so as to coincide with the refrigerant outlet from the lower half flow path group.

According to the laminated evaporator of the second aspect of the present invention,
By changing the ratio between the number of plates constituting the first plate assembly and the number of plates constituting the third plate assembly, the temperature distribution can be changed. This has the effect of increasing the degree of freedom in designing the evaporator. Also, the inner pipe part
Since it is obtained by providing the inner plate portion forming recess in the third plate, it is not necessary to separately insert the inner pipe, and the problem caused by inserting the inner pipe (the pressure loss of the refrigerant increases, the weight becomes Insert pipe becomes heavy, insertion of inner pipe is troublesome,
A seal between the outer peripheral surface of the inner pipe tip and the partition is required, making it difficult to perform positioning work, etc.).

The stacked evaporator according to the first aspect of the present invention is the stacked evaporator according to the first or second aspect of the present invention, wherein the upper half of the pair of first plates located in the middle of the first plate assembly is provided. An upper / lower communication path forming recess for communicating the partial flow path group and the lower half flow path group is further provided.

According to a third aspect of the present invention, there is provided a laminated evaporator.
A part of the refrigerant flowing in the upper half flow path group is short-cut and flows to the lower half flow path group, whereby the refrigerants having different temperatures are mixed, so that the temperature distribution can be made more uniform, and the heat distribution can be improved. Exchange efficiency is also improved. In addition, by using the first plate provided with the concave portion for forming the upper and lower communication passages also as the first plate for partitioning, it is possible to prevent an increase in the number of plate types.

[0014]

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

FIGS. 1 to 6 show a first embodiment of a laminated evaporator according to the present invention. This stacked evaporator
(1) is made of aluminum (including aluminum alloy) and is used for car air conditioners.

As shown in FIG. 1, the evaporator (1) comprises a first plate assembly (2) comprising a plurality of first plates (5) and (5A) and constituting a main circuit portion, and a plurality of first plates (5) and (5A). A second plate assembly (3) comprising a second plate (6) and arranged on the left side of the first plate assembly (2) to constitute a turn-side circuit portion;
First plate assembly comprising a plurality of third plates (7)
And a third plate assembly (4) arranged on the right side of (2) and constituting an entrance / exit side circuit section, wherein a fluid is provided on the upper front side of the right side surface of the third plate assembly (4). Introductory pipe
(9) is connected, and a fluid discharge pipe (10) is connected to the rear side.

As shown by an arrow in FIG.
The refrigerant introduced into the third plate assembly (4) by (9) flows to the left in the upper half of the first plate assembly (2) and turns in the second plate assembly (3). , Flows rightward in the lower half of the first plate assembly (2), further upwards in the third plate assembly (4), and is discharged from the fluid discharge pipe (10). .

FIGS. 3 to 6 show each plate assembly.
(2), (3) and (4) show plates (5), (5A), (6) and (7).

The plate shown in FIG. 3 is a standard one of the first plates (5) constituting the first plate assembly (2). As shown in the figure, the standard first plate (5) has a U-shaped recess (41) for forming a flow path and upper and lower header forming recesses (42) and (43) connected to both ends thereof. An inverted U-shaped concave portion (45) for forming a flow path and concave portions (46) and (47) for forming lower front and rear headers connected to both ends of the concave portion are provided in a lower half portion. The upper and lower header forming recesses (42) and (43) are deeper than the flow path forming U-shaped recess (41), and the bottom wall of each of the recesses (42) and (43) is formed.
(42a) (43a) has a substantially oblong refrigerant passage hole (44) long front and back
Has been opened. Similarly, the lower front and rear header forming recesses
(46) (47) is deeper than the inverted U-shaped concave portion (45) for forming a flow path, and the bottom wall (46a) (47a) of each concave portion (46) (47) has a substantially oval A coolant passage hole (48) is provided.

The two first plates (5) are inserted into the concave portions (41) and (42).
When (43), (45), (46), and (47) are overlapped and joined to face each other, a U-shaped flow path is formed by the U-shaped recesses (41), and an inverted U-shaped recess (45) An inverted U-shaped channel is formed by each other, and the recesses for header formation (42) (43) (46) (47)
The bottom walls (42a), (43a), (46a), and (47a) of the U-shaped recess (41) and the inverted U-shaped recess (45) protrude from the bottom walls.

The U-shaped recess (41) of the first plate (5)
The inverted U-shaped recess (45) has a plurality of J-shaped ridges (49) joined to the opposed recesses (41) and (45) to divide each channel into U-shaped small channels. ) Is provided.

The plate shown in FIG. 4 is a partitioning first plate (5) disposed at the center of the first plate assembly (2).
A). As shown in the figure, the first partitioning plate (5
A) has substantially the same shape as the standard first plate (5) shown in FIG. 3, and the same components are denoted by the same reference numerals and description thereof will be omitted. The difference between the first partition plate (5A) and the standard first plate (5) is that the first partition plate (5A) has a U-shaped concave portion (41) for forming a flow path in the upper half and a lower portion. A half-way passage-forming inverted U-shaped recess (45) is provided with a vertical communication passage forming recess (50) having the same depth as these recesses (41) and (45). The bottom wall (42a) of the upper front header forming recess (42) and the lower rear header forming recess (47) of the first partitioning plate (5A).
The bottom wall (47a) has no coolant passage hole (48).

The two first plates (5A) for partitioning are recessed.
When (41), (42), (43), (45), (46), and (47) are overlapped and joined in a state of facing each other, a U-shaped recess ( 41), a U-shaped channel is formed by each other, and an inverted U-shaped channel is formed by the inverted U-shaped concave portions (45), and the U-shaped channel and the inverted U-shaped channel are communicated. A vertical communication path (34) (see FIG. 2) is formed.

The first plate assembly (2) consists of two partitioning first plates (5A) and ten standard first plates (5) arranged on both sides thereof. Place the plate (5) on the bottom wall (42) of the header forming recesses (42) (43) (46) (47).
a) (43a) (46a) (47a) Alternate recesses (41) so that they contact each other
(42) (43) (45) (46) (47) While changing the direction and superimposing, the gap formed between the bottom walls of the U-shaped recess (41) and the inverted U-shaped recess (45) By joining via corrugated fins (8), the U-shaped upper half flow path group (13A) (13
B), upper and lower headers (12A) (12B) (14
A) (14B), inverted U-shaped lower half flow path group (19A) (19B), lower front and rear headers (18A) (18B) (20A) (20B) connected to both ends thereof and U-shaped upper half Upper and lower communication paths for short-circuiting refrigerant from the flow path group (13A) (13B) to the inverted U-shaped lower half flow path group (19A) (19B)
A first plate assembly (2) with corrugated fins (8) having (34) is formed.

In the first plate assembly (2), the bottom wall (42a) of the upper front header forming recess (42) and the lower rear header forming recess (47) of the first partition plate (5A) are formed. (47
In (a), since no refrigerant passage hole (48) is formed, the upper front header is divided into a right half (12A) and a left half (12B), and the lower rear header is also divided into a right half (12). 20A) and the left half (20B). On the other hand, the right half (14A) of the upper rear header communicates with the left half (14B) of the upper rear header, and the right half (18A) of the lower front header and the left half (18B) of the lower front header. ). The plates (5) at the left and right ends of the first plate assembly (2) have recesses (4) for forming the upper rear header.
No coolant passage hole (48) is formed in the bottom wall (43a) of (3) and the bottom wall (46a) of the lower front header forming recess (46).

In this manner, as shown in FIG. 2, the upper half of the first plate assembly (2) is provided with the right end opening of the upper front header as the refrigerant inlet (26), and the right half (12A) of the upper front header. , U-shaped upper half channel group (13) on the right of the first partition plate (5A).
A), the right half of the upper rear header (14A), the left half of the upper rear header (14B), the U-shaped upper half flow path group (13B) to the left of the first partitioning plate (5A) and the upper part Left half of front header (14B)
To form a refrigerant circuit in the upper half part with the left end opening of the upper front header as the refrigerant outlet (27), and the first plate assembly
In the lower half of (2), insert the left end opening of the lower rear header into the refrigerant inlet (3
0), the left half (20B) of the lower rear header, the inverted U-shaped lower half flow path group (19B) left of the first partitioning plate (5A), and the left half (18B) of the lower front header. , Right half of lower front header (18A)
Flow through the lower U-shaped lower half flow path group (19A) to the right of the first partitioning plate (5A) and the right half (20A) of the lower rear header. A lower half refrigerant circuit (31) is formed. The upper and lower communication passages (34) extend from the right end flow path of the left U-shaped upper half flow path group (13B) to the right reverse U flow path.
The refrigerant is short-cut to the left end flow path of the lower half flow path group (19A).

The plate shown in FIG. 5 is a second plate (6) constituting a second plate assembly (3). As shown in FIG. 5, the second plate (6) is I-shaped recess
(61), the upper header forming recess (62), which is deeper than the flow passage forming recess (61) and continues to the upper end of the front half thereof, and has the same depth as the upper header forming recess (62) and the flow passage. A lower header forming recess (63) is provided at the lower end of the rear half of the forming recess (61). Bottom walls (62a) (63a) of upper and lower header forming recesses (62) (63)
Each has a substantially oval refrigerant passage hole (64) long before and after.

The two second plates (6) are inserted into the concave portions (61) and (62).
When the (63) are overlapped and joined in a state where they face each other, an I-shaped channel extending vertically is formed by the I-shaped recesses (61), and the upper and lower header forming recesses (62) (63) The bottom walls (62a) and (63a) of the I-shaped recess (61) project more than the bottom wall of the I-shaped recess (61).

The channel forming recess of the second plate (6)
(61) has an I-shaped channel group which is joined to the opposite recess (61).
A plurality of I-shaped and J-shaped ridges (65) for dividing each I-shaped flow path of (16) into a plurality of small flow paths are provided.

The second plate assembly (3) is composed of eight second plates (6). These second plates (6) are connected to the bottom wall (62a) of the upper and lower header forming recesses (62) (63). ) (63a) are alternately placed so that the recesses (61), (62), and (63) are in contact with each other so that they overlap each other, and the corrugated fins ( 8) to form a corrugated fin having an I-shaped flow path group (16) and upper and lower headers (15) (17) connected to the upper and lower ends thereof.
A second plate assembly (3) with (8) is formed.

The recess (6) for forming the upper header on the second plate (6)
2) The recess (42) for forming the upper front header of the first plate (5)
Are provided at the same position as the two concave portions (62) and (42).
The coolant passage holes (64) and (44) of the bottom walls (62a) and (42a) are also provided in the same position at the same size. The lower header forming recess (63) of the second plate (6) is provided at the same position as the lower rear header forming recess (47) of the first plate (5). ) (47) refrigerant passage hole (64) in the bottom wall (63a) (47a)
(48) is also provided at the same position with the same size. Also,
The second plate (6) at the left end of the second plate assembly (3)
Then, the bottom walls (62a) (63
No coolant passage hole (64) is provided in a).

Thus, the second plate assembly (3) includes:
As shown in FIG. 2, the right end opening (28) is the upper half flow path group (13A).
The upper header (15) coinciding with the refrigerant outlet (27) from (13B), the I-shaped flow path group (16) flowing from top to bottom, and the right end opening (29) have a lower half flow path group (19A) ( A lower header (17) corresponding to the refrigerant inlet (30) to the first plate assembly (19B) turns the refrigerant flowing through the upper half refrigerant circuit of the first plate assembly (2) to turn the first plate assembly ( 2) A turn-side circuit portion for sending to the refrigerant circuit in the lower half portion is formed.

The plate shown in FIG. 6 is a third plate (7) constituting a third plate assembly (4). As shown in FIG. 6, the third plate (7) Forming I
Character-shaped concave portion (71), and the upper and lower entrance side header forming concave portion (7
2), an entrance-side lower header forming recess (73) having the same depth as the entrance-side upper header forming recess (72) and continuing to the lower end of the rear half of the entrance-side flow path forming recess (71); At the same depth as the side upper and lower header forming recesses (72) and (73) and above the front half of the flow path forming I-shaped recess (71), the flow path forming I-shaped recess (71) has Inner pipe forming recesses (7
5). The bottom wall (72a) (73a) of the upper and lower header forming recesses (72) (73) and the bottom wall (75a) of the inner pipe forming recess (75) respectively have a substantially oblong refrigerant passage hole ( 74) (76) has been opened. I-shaped recess for channel formation (7
1) The vertical length of the first half is shorter than the vertical length of the second half,
This prevents the upper end of the flow path forming I-shaped recess (71) from being connected to the inner pipe forming recess (75).

The two third plates (7) are inserted into the concave portions (71) and (72).
(73) are overlapped and joined in a state where they face each other, an inlet / outlet side I-shaped channel extending vertically is formed by the channel forming I-shaped concave portions (71), and the upper and lower header forming concave portions are formed. The bottom walls (72a) and (73a) of (72) and (73) and the bottom wall (75a) of the inner pipe forming recess (75) project more than the bottom wall of the flow path forming I-shaped recess (71). Will be.

Each of the I-shaped flow passages of the I-shaped flow passage group (22) is joined to the recessed portion (71) of the third plate (7) on the inlet / outlet side of the flow passage forming recess (71). A plurality of I-shaped and J-shaped ridges (77) for dividing the road into a plurality of small flow paths are provided.

The third plate assembly (4) is composed of eight third plates (7). These third plates (7) are used to form upper and lower header forming recesses (72) and (73) and inner pipe forming. The bottom walls (72a) (73a) of the recess (75) are alternately superposed by changing the orientation of the recesses (71) (72) (73) (75) so that the 75a are in contact with each other, and the I-shaped channel forming The corrugated fins (8) are interposed and joined to the gaps formed between the bottom walls of the concavities (71), so that the entrance-side I-shaped flow path group (22), the entrance-side vertical Corrugated fins having headers (21) (23) and inner pipe part (11) extending right and left
A third plate assembly (4) with (8) is formed.

The upper header forming recess (72) of the entrance / exit side of the third plate (7) is provided at the same position as the upper rear header forming recess (43) of the first plate (5). Both recesses
The refrigerant passage holes (74) and (44) in the bottom walls (72a) and (43a) of (72) and (43) are also provided at the same position with the same size. Third plate
The recess (73) for forming the lower header on the entrance side of (7) is provided at the same position as the recess (47) for forming the lower header of the first plate (5). 47) Bottom wall (73a) (47a)
Refrigerant passage holes (74) and (48) are also provided at the same position with the same size. The inner pipe portion forming recess (75) of the third plate (7) is provided at the same position as the upper front header forming recess (42) of the first plate (5). The coolant passage holes (76) and (44) in the bottom walls (75a) and (42a) of () and (42) are also provided at the same position with the same size. Also, the third
The plate (7) at the right end of the plate assembly (4) does not have a coolant passage hole (74) formed in the bottom wall (72a) of the lower header forming recess (72).

Thus, the third plate assembly (4) includes:
As shown in FIG. 2, the left end opening (25) is the upper half flow path group (13A)
(13B) Inner pipe part (1
1), the entrance-side lower header (23) whose left end opening (32) matches the refrigerant exit (31) from the lower half flow path group (19A) (19B), the entrance-side I-shape flowing from bottom to top A flow path group (22) and an entrance / exit-side circuit portion formed of an entrance / exit-side upper header (21) connected to the upper end of the flow path group (22) are formed. A fluid introduction pipe (9) is connected to the right end of the inner pipe section (11), and a fluid discharge pipe (10) is connected to the right end of the entrance-side upper header (21).

According to the evaporator (1) for a car air conditioner constructed as described above, while the air introduced from outside the vehicle cabin passes through the gap where the corrugated fins (8) exist, each plate assembly is formed. (2) It is cooled by the refrigerant flowing in (3) and (4), and is supplied for cooling the driver's seat and the passenger's seat in the passenger compartment.

The refrigerant flows as follows.

The refrigerant introduced through the refrigerant introduction pipe (9) enters the inner pipe portion (11) of the third plate assembly (4) from the right end opening (24), and flows through the inside from the right to the left. Since the left end opening (25) of the inner pipe portion (11) coincides with the refrigerant inlet (26) at the right end of the upper front header (12A) of the first plate assembly (2), the refrigerant flows through the refrigerant inlet (26). From the first plate assembly (2), the right half (12A) of the upper front header,
The right half (13A) of the upper half flow path group, the upper rear header (14A) (14
B), through the left half (13B) of the upper half flow path group and the left half (12B) of the upper front header, and through the left end opening of the left half (12B) of the upper front header (the upper half flow path group). (13A) and (13B) refrigerant outlet (27)). Since the refrigerant outlet (27) matches the right end opening (28) of the upper header (15) of the second plate assembly (3), the refrigerant flows into the upper header (15) of the second plate assembly (3). ) And the I-shaped flow path group (16) to reach the lower header (17). The right end opening (29) of the lower header (17) is connected to the left end opening of the lower rear header of the first plate assembly (2) (the refrigerant inlet (30) to the lower half flow path group (19A) (19B)). Since they are coincident, they are introduced from here into the lower half of the first plate assembly (2). First plate assembly
The refrigerant introduced in (2) is in the left half (20B) of the lower rear header.
, Lower half flow path group left half (19B), lower front header left half (18B), lower front header right half (18A), lower half flow path group right half (19A) And a refrigerant outlet (31) from the lower half flow path group (19A) (19B) provided at the right end of the right half (20A) of the lower rear header, flowing through the right half (20A) of the lower rear header. Leads to. Since the left end opening (32) of the entrance-side lower header (23) of the third plate assembly (4) coincides with the refrigerant outlet (31) from the lower half flow path group (19A) (19B), Enters the entrance-side lower header (23) of the third plate assembly (3), and enters the entrance-side I-shaped flow path group (2
2) and through the upper header (21) on the entrance side to reach the refrigerant outlet (33) at the right end of the upper header (21) on the entrance side, and the refrigerant discharge pipe (1
0) is discharged from the evaporator (1).

According to the evaporator (1) of the first embodiment,
The refrigerant cools the air introduced into the room while flowing through the evaporator (1), and the refrigerant itself becomes high temperature. Therefore, the temperature of the refrigerant is controlled by the right half (13A), the left half (13B), and the second plate assembly (3) of the upper half flow path group of the first plate assembly (2).
Of the I-shaped flow path group (16), the left half (19B), the right half (19A), and the third plate assembly (4) of the lower half flow path group of the first plate assembly (2). It becomes higher in the order of the I-shaped channel group (22).
Therefore, considering the right half and the left half of the evaporator (1), the right half contains a very low temperature fluid immediately after being introduced and a very high temperature fluid immediately before being discharged. However, in the left half, the fluid that flowed through the right half (13A) of the upper half flow path group and became slightly hotter, and then flowed through the left half (19B) of the lower flow path group and became hotter. However, the temperature of the refrigerant in the left half of the evaporator (1) is almost equal to the average temperature of the refrigerant in the right half of the evaporator (1). Become. Therefore, when this is used as a car air conditioner, for example, air that has passed through the left half of the evaporator (1) is blown to the driver's seat side, and air that has passed through the right half of the evaporator (1) is blown to the passenger seat side, Since the temperature of the air to be blown is substantially equal between the left and right sides, there is no occurrence of a left-right imbalance that the passenger seat side is too cold and the driver seat side is not sufficiently cooled.

FIGS. 7 and 8 show a second embodiment of the laminated evaporator according to the present invention. The plate shown in FIG. 7 is another embodiment of the third plate constituting the third plate assembly. FIG. 8 shows a flow path when the third plate assembly is combined with the first and second plate assemblies.

As shown in FIG. 7, the third plate (80)
In the upper half, a substantially square upper half flow path forming recess (81), an upper half upper header forming recess (82) and an upper half lower header forming recess (83) connected vertically above and below it. In the lower half, a substantially rectangular lower half flow path forming recess (85), a lower half upper header forming recess (86) connected vertically, and a lower half lower header forming Recess (87). Upper half upper and lower half lower header forming recesses (82) (83)
Are deeper than the upper half channel forming recess (81), and each recess (82) (8
In the bottom wall (82a) (83a) of 3), a substantially oblong refrigerant passage hole (84) is formed long in front and rear. Similarly, the lower half upper and lower half lower header forming recesses (86) and (87) are deeper than the lower half flow passage forming recesses (85), and the bottom wall of each of the recesses (86) and (87). 86a) (87
In (a), a substantially oblong refrigerant passage hole (88) is formed long in front and back.

The two third plates (80) are inserted into the concave portions (81) and (82).
When (83), (85), (86), and (87) are overlapped and joined in a state where they face each other, a substantially rectangular upper half flow path is formed by the upper half flow path forming recesses (81), and the lower flow path is formed. A substantially rectangular lower half flow path is formed by the half flow path forming recesses (85),
Header forming recesses (82) (83) (86) (87) bottom wall (82a) (83a) (8
6a) and (87a) project from the bottom walls of the upper half flow path forming recess (81) and the lower half flow path forming recess (85).

The concave portion (81) for forming the upper half flow path and the concave portion (85) for forming the lower half flow path of the third plate (80) are joined to opposing concave portions (81) and (85). A plurality of I-shaped and J-shaped ridges (89) for partitioning the upper half flow path and the lower half flow path into a plurality of small flow paths, respectively, are provided.

The third plate assembly (40) is composed of eight third plates (80), and these third plates (80) are connected to the header forming recesses (82) (83) (86) (87). ) Bottom wall (82a) (83a) (8
6a) (87a) alternately so that the recesses (81) (82) (83) (8
5) While changing the directions of (86) and (87) and superimposing, the upper half flow path forming recess (81) and the lower half flow path forming recess (85)
The corrugated fins (8) are interposed in the gaps between the bottom walls of
(91), upper and lower upper and lower half headers (92) and (90) connected vertically, and an inlet / outlet upper half channel group (91) and an inlet / outlet lower half channel group (94) ), A third plate assembly (40) with corrugated fins (8) having lower half upper and lower half lower headers (95) (93) connected vertically.

The upper half upper header forming recess (82) of the third plate (80) is provided at the same position as the upper front header forming recess (42) of the first plate (5). In addition, the coolant passage holes (84) and (44) in the bottom walls (82a) and (42a) of the two recesses (82) and (42) are also provided at the same position in the same size. Also, the lower half lower header forming recess (87) of the third plate (80) is
It is provided at the same position as the lower header forming recess (47) of the lower portion of the plate (5), and the bottom wall (8) of both recesses (87) (47) is provided.
The coolant passage holes (88) and (48) of 7a) and (47a) are also provided at the same position with the same size. In the third plate (80) at the right end of the third plate assembly (40), the bottom wall (82a) of the upper half upper header forming recess (82) and the lower half lower header forming recess (87) are formed. ) Does not have a coolant passage hole (84) formed in the bottom wall (87a), and the plate (80) on the left end of the third plate assembly (40) has an upper half lower header forming recess ( 83) bottom wall (8
3a) and the bottom wall (86) of the lower half upper header forming recess (86)
In (a), the coolant passage hole (84) is not provided.

Thus, the third plate assembly (40)
As shown in FIG. 8, the upper half lower header (90), the inlet / outlet upper half flow path group (91) flowing from the upper half to the upper half, and the left end opening (97) include the first plate assembly (2 ) Upper half flow path group (13A)
(13B) and the upper half upper header (9
The upper half circuit consisting of 2) and the left end opening (98) are the refrigerant outlets from the lower half flow path group (19A) (19B) of the first plate assembly (2).
(31) lower half lower header (93), the lower half of the entrance half lower half flow path group (94) flowing from the lower half upward and the lower half upper header (95) Circuit is formed.
The fluid introduction pipe (9) is connected to the right end opening (96) of the upper half lower header (90), and the fluid discharge pipe (10) is connected to the right end opening (99) of the lower half upper header (95). Have been.

According to the car air conditioner evaporator (1 ') configured as described above, the refrigerant flows as follows, as shown in FIG.

The refrigerant introduced through the fluid introduction pipe (9) enters the upper half lower header (90) from the right end opening (90), and enters the upper half lower header (90), the inlet / outlet upper half flow path group. (91) and the upper half upper header (92).
To the far left. Left end opening (97) of upper half upper header (92)
Is the upper half flow path group (13A) (13B) of the first plate assembly (2).
The refrigerant is introduced into the upper half flow path group (13A) (13B) of the first plate assembly (2) because the refrigerant inlet (26) coincides with the refrigerant inlet (26). After that, it flows in the same manner as in the first embodiment,
A refrigerant outlet (31) from the lower half flow path group (19A) (19B) of the first plate assembly (2) is reached. The left end opening (98) of the lower half lower header (93) of the third plate assembly (40) is connected to the refrigerant outlet from the lower half flow path group (19A) (19B) of the first plate assembly (2). (31), the refrigerant enters the lower half lower header (93) of the third plate assembly (40), and enters the lower half flow path group (9
After passing through 4) and the lower half upper header (95), it reaches the right end opening (99) of the lower half upper header (95), and is discharged from the fluid discharge pipe (10).

According to the evaporator (1 ') of the second embodiment,
The refrigerant cools the air introduced into the room while flowing in the evaporator (1 '), and the refrigerant itself becomes high temperature. Therefore, the temperature of the refrigerant is controlled by the upper half flow path group (91) on the inlet / outlet side of the third plate assembly (40) and the right half (13A) of the upper half flow path group of the first plate assembly (2). , Left half (13B), second plate assembly
(3) I-shaped channel group (16), left half (19B), right half (19A), and third plate aggregate (19B) of the lower half channel group of the first plate assembly (2) 40) It becomes higher in the order of the lower half flow path group (94). Therefore, considering the right half and the left half of the evaporator (1), the right half contains a very low temperature fluid immediately after being introduced and a very high temperature fluid immediately before being discharged. However, in the left half, the fluid that flowed through the right half (13A) of the upper half flow path group and became slightly hotter, and then flowed through the left half (19B) of the lower flow path group and became hotter. The fluid at a lower temperature than immediately before being discharged is mixed, and the average temperature of the refrigerant in the left half of the evaporator (1 ') and the average temperature of the refrigerant in the right half of the evaporator (1') are as follows: It is almost equal. Therefore, while using this as a car air conditioner, for example, air passing through the left half of the evaporator (1 ′) may be blown to the driver's seat side, and air passing through the right half may be blown to the passenger seat side. Since the temperature of the air to be blown is substantially equal between the left and right sides, there is no occurrence of a left-right imbalance such that the passenger seat side is too cold and the driver seat side is not sufficiently cooled.

In the first and second embodiments, the first plate for partitioning the first plate assembly (2) is used.
(5A) may be a standard first plate (5). Also, the vertical communication passage forming recess (50) provided in the first partition plate (5A) may be omitted. First plate for partition (5A)
, So-called multi-pass circuits are respectively formed in the upper half and the lower half of the first plate assembly (2), and the refrigerant is mixed where the first partition plate (5A) is provided. Thus, the heat exchange efficiency can be increased. In addition, when the first communicating plate (5A) is provided with the recess (50) for forming the upper and lower communication passages, a part of the refrigerant flowing through the upper half flow path group (13A) (13B) is short-cut and the lower half is formed. Flow path group (1
By flowing to 9A) and (19B), refrigerants having different temperatures are mixed, so that the temperature distribution can be easily made uniform, and the heat exchange efficiency can be improved. Instead of providing the vertical communication passage forming recess (50) in the first partitioning plate (5A), a vertical communication passage forming recess may be provided in another first plate, or the partitioning first plate ( 5A) may be provided not at one place at the center but at two places that divide the first plate assembly (2) into approximately three equal parts. Also, the upper half flow path group and the lower half flow path group And the number of partitions may be changed. Further, the number of plates forming each plate assembly (2), (3), (4) may be appropriately changed. That is, the first plate,
The ratio of the numbers of the second plate and the third plate is approximately 2:
The ratio is set to 1: 1, but it is preferable to increase the number of the first plates and reduce the numbers of the second plates and the third plates in terms of heat exchange efficiency.

It should be noted that the third plate assembly (4) (40) is deleted from the first and second embodiments, and the first plate assembly (2) and the second plate assembly (3) are formed. The same effect can be obtained by using as an evaporator. In this case, the first
A refrigerant introduction pipe is connected to the right end opening (26) of the upper front header (12A) (12B) of the plate assembly (2), and this is used as the refrigerant inlet of the evaporator, and the right end of the lower rear header (20A) (20B) is connected. A refrigerant discharge pipe may be connected to the opening (31), and this may be used as a refrigerant outlet of the evaporator.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a stacked evaporator according to the present invention.

FIG. 2 is a perspective view showing one embodiment of a flow path of the laminated evaporator according to the present invention.

FIG. 3 is a perspective view showing a first plate constituting a main circuit portion of the laminated evaporator according to the present invention.

FIG. 4 is a perspective view showing a first partitioning plate among first plates constituting a main circuit portion of the stacked evaporator according to the present invention.

FIG. 5 is a perspective view showing a second plate constituting a turn circuit unit of the stacked evaporator according to the present invention.

FIG. 6 is a perspective view showing a third plate constituting an inlet / outlet side circuit portion of the stacked evaporator according to the present invention.

FIG. 7 is a perspective view showing a modified example of the third plate constituting the entrance / exit-side circuit portion of the stacked evaporator according to the present invention.

FIG. 8 is a perspective view showing a flow path of a stacked evaporator using a third plate according to a modified example.

[Explanation of symbols]

 (1) (1 ') Stacked evaporator (2) First plate assembly (3) Second plate assembly (4) Third plate assembly (5) First plate (5A) First plate for partition ( 6) 2nd plate (7) 3rd plate (11) Inner pipe section (12A) (12B) Upper front header section (13A) (13B) Upper half flow path group (14A) (14B) Upper rear header section ( 15) Upper header (16) I-shaped flow path group (17) Lower header (18A) (18B) Lower front header (19A) (19B) Lower half flow path group (20A) (20B) Lower rear header (21 ) Lower header part (22) I-shaped flow path group (23) Upper header part (24) Refrigerant inlet (25) Inner pipe left end opening (26) Refrigerant inlet (27) Refrigerant outlet (28) Upper header right end opening ( 29) Right end opening of lower header (30) Refrigerant inlet (31) Refrigerant outlet (32) Left end opening of lower header on inlet / outlet side (33) Refrigerant outlet (41) U-shaped recess for flow path formation (42) (43) Upper front header Forming recesses (42a) (43a) Bottom wall (44) Refrigerant passage hole (45) Flow path forming inverted U-shaped recess (46) (47) Lower front Rear header forming recess (46a) (47a) Bottom wall (48) Refrigerant passage hole (50) Vertical communication passage forming recess (61) Flow path forming I-shaped recess (62) (63) Upper and lower header forming recess (62a) (63a) Bottom wall (64) Refrigerant passage hole (71) I-shaped concave part for inlet / outlet flow path formation (72) (73) Recessed part for upper and lower header formation (72a) (73a) Bottom wall (74) Refrigerant Passage hole (75) Recess for forming the inner pipe (76) Coolant passage hole

Claims (3)

[Claims] 1. A U-shaped recess (41) for forming a flow path and upper and lower header forming recesses (42) (42) (43) which are connected to both ends thereof and have bottom walls (42a) (43a) with refrigerant passage holes (44). 43) is provided in the upper half part, the lower front and rear header formation having an inverted U-shaped concave part (45) for forming a flow path and bottom walls (46a) (47a) connected to both ends thereof and having a refrigerant passage hole (48). A plurality of first plates (5) (5A) having recesses (46) and (47) for the lower half are alternately provided with recesses (4).
1) By changing the direction of (42) (43) (45) (46) (47) and overlapping and joining, the U-shaped upper half channel group (13A) (13
B), inverted U-shaped lower half flow path group (19A) (19B), U-shaped upper half flow path group (13A) (13B), upper front and rear headers (12A) (12
B) forming the lower front and rear headers (18A) (18B) (20A) (20B) connected to both ends of the (14A) (14B) and the inverted U-shaped lower half flow path group (19A) (19B). One plate assembly (2), I-shaped recess (61) for forming a flow path, and refrigerant passage holes connected to the upper and lower ends thereof
(64) With upper and lower header forming recesses having bottom walls (62a) and (63a)
(62) The plurality of second plates (6) provided with (63) are
By alternately changing the direction of the recesses (61), (62), and (63) and overlapping and joining, the I-shaped flow path group (16) and the upper and lower headers (15) (17) ) Forming a second plate assembly (3), and the upper front and rear headers (12A) (12B) (1) of the first plate assembly (2).
One of the right end openings of 4A) and (14B) serves as a refrigerant inlet (26) to the upper half flow path group (13A) (13B), and the upper front and rear headers
One of the left end openings of (12A), (12B), (14A), and (14B) serves as a refrigerant outlet (27) from the upper half flow path group (13A) (13B),
One of the left end openings of the lower front and rear headers (18A) (18B) (20A) (20B) is a refrigerant inlet to the lower half flow path group (19A) (19B).
(30), the lower front and rear headers (18A) (18B) (20A) (20B) one of the right end opening of the lower half flow path group (19A) (19B)
And the second plate
(6) In the refrigerant passage hole (64) of the upper header forming recess (62), the right end opening (28) of the upper header (15) of the second plate assembly (3) corresponds to the upper half flow path group (13A). ) (13B) is provided so as to coincide with the refrigerant outlet (27), and the refrigerant passage hole (64) of the lower header forming recess (63) of the second plate (6) (6A) is The right end opening (29) of (17) is the refrigerant inlet (3) to the lower half flow path group (19A) (19B).
A stacked evaporator provided to match 0). 2. An I-shaped recess (71) for forming an inlet / outlet passage and a bottom wall (7) connected to upper and lower ends thereof and having a refrigerant passage hole (74).
2a) Entrance-side upper and lower header forming recesses (72) (73) having (73a)
A plurality of third plates (7) provided with (3) are alternately superposed and joined by changing the directions of the recesses (71), (72), (73), so that the inlet / outlet side I-shaped flow is formed. A third group of plates (4) forming a group of roads (22) and upper and lower headers (21), (23) on the entrance side connected to the upper and lower ends of the group of roads (22); Located above the U-shaped recess (71),
By further providing an inner pipe portion forming recess (75) having the same depth as the upper and lower header forming recesses (72) and (73) and having a bottom wall (72a) (73a) with a refrigerant passage hole (76), To the third plate assembly (3), insert the inner pipe section (1
1) is formed, the inner pipe part forming recess (75)
Refrigerant passage hole (76) is the left end opening of the inner pipe part (11).
(25) is provided so as to coincide with the refrigerant inlet (26) to the upper half flow path group (13A) (13B), and the inlet / outlet side lower header forming recess (73)
Refrigerant passage hole (74) is the left end opening of the entrance-side lower header (23).
2. The laminated evaporator according to claim 1, wherein the (32) is provided so as to coincide with the refrigerant outlet (31) from the lower half flow path group (19A) (19B). 3. A pair of upper plates (13A) and (13B) are provided on a pair of first plates (5A) located in the middle of the first plate assembly (2).
3. A vertical communication passage forming recess (50) for communicating the lower half flow path group (19A) (19B) with the lower half flow path group (19A) (19B).
Stacked evaporator.