JP2003214726A - Stacked evaporator and air conditioner with the stacked evaporator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stacked evaporator that can make a refrigerant substantially equally flow into an upstream side and a downstream side of an inlet header part, and an air conditioner with the stacked evaporator. <P>SOLUTION: The stacked evaporator comprises a plurality of connected evaporator segments, each of which has a pair of drawn flat plates stacked to form, between the adjacently opposed flat plates, at least one refrigerant passage substantially parallel to a longitudinal axis of the flat plates. The inlet header part 6 has an inflow refrigerant distributing means 100 capable of dividing the inlet header part 6 into a plurality of blocks B1 and B2 in the evaporator segment stack direction to make a refrigerant flow into each of the blocks B1 and B2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated evaporator and an air conditioner equipped with the laminated evaporator.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing an example of a conventional laminated evaporator used in an air conditioner, particularly an air conditioner for a vehicle. The laminated evaporator 10 shown in the figure is called a drone cup type, which is becoming the mainstream in recent years, and a pair of drawn flat plates 1 and 2 are overlapped with each other so that the flat plates 1 and 2 that are adjacent to each other face each other. Flat plate 1,
A plurality of evaporator segments 3 that form a refrigerant flow path R that is substantially parallel to the longitudinal axis of 2 are connected in series.

On these flat plates 1 and 2, there are formed a refrigerant inlet 4 and a refrigerant outlet 5 which communicate with one end and the other end of a U-shaped refrigerant channel R, respectively. Both the refrigerant inlet 4 and the refrigerant outlet 5 are provided on one side in the longitudinal direction of the evaporator segment 3, and the refrigerant flow path R is formed so as to make a U-turn on the other side of the evaporator segment 3.

By stacking the evaporator segments 3 on each other, the refrigerant inlets 4 are communicated with each other and the refrigerant outlets 5 are communicated with each other to form an inlet header portion 6 and an outlet header portion 7, respectively. .

In such a laminated evaporator 10, the refrigerant is distributed to each evaporator segment 3 at the refrigerant inlet 4.
Evaporated and vaporized in the process of flowing through the refrigerant flow path R, and the refrigerant outlet 5
In (1), they merge again and flow out from the laminated evaporator 10.

[0006]

However, in such a laminated evaporator 10, FIG. 8 ((a) is a view of the evaporator from above, and (b) is a view of the evaporator from the front). is there)
As shown in the schematic flow of the refrigerant, most of the refrigerant flows into the refrigerant flow path R on the upstream side of the inlet header section 6, so that the refrigerant does not reach the downstream side of the inlet header section 6 and There has been a problem that heat exchange is not sufficiently performed in each evaporator segment 3 located on the downstream side of the section 6.

The present invention has been made in view of the above circumstances, and the refrigerant can be made to flow into the inlet header portion at the upstream side and the downstream side substantially evenly, and thereby the heat exchange efficiency of the entire evaporator is improved. (EN) Provided are a laminated evaporator and an air conditioner equipped with the laminated evaporator, which can make the temperature distribution of an external fluid (for example, air) heat-exchanged by the evaporator more uniform. The purpose is to do.

[0008]

In order to solve the above-mentioned problems, the following means are adopted in the laminated evaporator and the air conditioner equipped with the laminated evaporator of the present invention. That is,
According to the laminated evaporator of claim 1, at least one pair of flat plates that have been subjected to a drawing process are overlapped with each other and are substantially parallel to a longitudinal axis of the flat plates between the adjacent flat plates. A plurality of evaporator segments forming a refrigerant flow path are connected in series, and the flat plate is formed with a refrigerant inlet and a refrigerant outlet that communicate with one end and the other end of the refrigerant flow path, respectively. In the laminated evaporator in which the refrigerant inlets are communicated with each other and the refrigerant outlets are communicated with each other by the segments being laminated to each other to form an inlet header portion and an outlet header portion, respectively, the inlet header portion Has
The inlet header portion is divided into a plurality of blocks in the stacking direction of the evaporator segment, and inflow refrigerant distribution means capable of respectively injecting a refrigerant is provided in each block. To do.

In this laminated evaporator, the inlet header portion is divided into a plurality of blocks in the stacking direction of the evaporator segments, and inflow refrigerant distribution means capable of respectively injecting a refrigerant into each block. Since it is configured to include, the refrigerant will flow into each block,
The refrigerant reaches the downstream side as well as the upstream side of the inlet header portion.

According to the laminated evaporator of the second aspect, in the laminated evaporator of the first aspect, the inflow refrigerant distribution means divides the inlet header portion into substantially equal sections and divides into a plurality of sections. It is characterized in that the blocks are formed and substantially the same amount of refrigerant flows into each of the blocks.

In this laminated evaporator, approximately the same amount of refrigerant flows into each block of the divided inlet header section. That is, the refrigerant is also supplied to the evaporator segments located on the downstream side of all the blocks.

According to the laminated evaporator of claim 3, in the laminated evaporator according to claim 1 or 2, the inflow refrigerant distribution means is a partition plate provided in the vicinity of the inlet of the inlet header portion. , And at least one partition plate that divides the inlet header portion into substantially even partitions and a partition plate provided in the vicinity of the inlet of the inlet header portion so as to penetrate in the thickness direction, and Of at least one throttle hole for adjusting the amount of the refrigerant flowing into the block located on the most upstream side of the block, and a partition plate provided near the inlet of the inlet header section are provided separately from the throttle hole. And at least one introduction pipe for introducing a refrigerant into each of the blocks other than the block located on the most upstream side while penetrating through the formed through hole. To.

In this laminated evaporator, the refrigerant is introduced into the block located on the most upstream side through the throttle hole, and the other blocks are introduced through the introduction pipe provided in the inlet header section. Will be flowed in.

According to the laminated evaporator of claim 4, in the laminated evaporator according to claim 1 or 2, the inflow refrigerant distribution means is a partition plate provided in the vicinity of the inlet of the inlet header portion. , And at least one partition plate that divides the inlet header portion into substantially even partitions and a partition plate provided in the vicinity of the inlet of the inlet header portion so as to penetrate in the thickness direction, and At least one throttle hole for adjusting the amount of the refrigerant flowing into the block located on the most upstream side of the block, and the inlet located on the upstream side of the partition plate provided near the inlet of the inlet header section. The cooling water is introduced from the header portion to the outside of the inlet header portion, and is cooled through the introduction holes provided in the inlet header portion corresponding to blocks other than the block located on the most upstream side. Characterized in that it comprises a and a dispensing tube for dispensing.

In this laminated evaporator, the refrigerant is introduced into the block located on the most upstream side through the throttle hole, and the other blocks are introduced through distribution pipes provided outside the inlet header section. Refrigerant will flow into each.

According to the laminated evaporator of the fifth aspect, in the laminated evaporator of the first aspect, the refrigerant inlet and the refrigerant outlet are both provided on one side in the longitudinal direction of the evaporator segment, The at least one refrigerant passage is formed so as to make a U-turn on the other side of the evaporator segment.

In this laminated evaporator, for example, as shown in FIG. 7, the flow of the refrigerant from the refrigerant inlet to the intermediate point of the refrigerant channel and the flow of the refrigerant from the intermediate point of the refrigerant channel to the refrigerant outlet. And are facing each other. That is, it is a counter flow.

An air conditioner according to a sixth aspect of the present invention comprises the laminated evaporator according to any one of the first to fifth aspects, and a compressor for compressing a refrigerant. Characterize.

In this air conditioner, the refrigerant reaches the downstream side as well as the upstream side of the inlet header portion.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The description of the main constituent elements of the laminated evaporator 10 (see FIG. 7) is the same as that described above, and therefore the description thereof is omitted here. Therefore, only the features of the present invention will be described here. Further, the same members as those of the related art are designated by the same reference numerals.

In the inlet header portion 6 of the laminated evaporator according to the present invention, the inlet header portion 6 is divided into a plurality of blocks in the stacking direction of the evaporator segment 3 (see FIG. 7), Inflow refrigerant distribution means capable of respectively injecting a refrigerant is provided in each block. This inflow refrigerant distribution means is configured such that the inlet header portion 6 is divided into substantially equal sections to form a plurality of blocks, and approximately the same amount of refrigerant flows into each of these blocks.

FIG. 1 shows an example of the inflow refrigerant distribution means. FIG. 1 is a view similar to FIG. 8 described above, in which (a) is a view of the evaporator seen from above, and (b) is a view of the evaporator seen from the front. The inflow refrigerant distribution means 100 includes two partition plates 1.
01, 102 and one introduction pipe 103 are main components.

The partition plates 101 and 102 have a thin plate shape. The partition plate 101 is fixed to a region of the inlet header portion 6 where the refrigerant flows, that is, the most upstream side (near the inlet) of the inlet header portion 6, and the partition plate 102 places the inlet header portion 6 in the stacking direction of the evaporator segments 3. And is fixed at a position where it is divided into two substantially equal blocks.

A diaphragm hole 101a and a through hole 101b located above the diaphragm hole 101a are formed in the partition plate 101, and a through hole 102a is formed in the partition plate 102. The throttle hole 101a is for allowing the refrigerant to flow into the block B1 located upstream of the blocks B1 and B2 of the inlet header section 6 separated by the partition plate 102. The size and number of diameters of the throttle holes 101a can be appropriately selected according to the amount of the refrigerant flowing into the block B1 from the throttle holes 101a.

The inner diameters of the through holes 101b and 102a are equal to the outer diameter of the introducing pipe 103, and the through holes 101b and 102a are
An introduction pipe 103 is passed through the inside of a. That is, the introduction pipe 1
One end of 03 is fixedly supported by the through hole 101b, and the other end of the introduction tube 103 is fixedly supported by the through hole 102a. As a result, the refrigerant existing upstream of the partition plate 101 flows into the block B2 through the inside of the introduction pipe 103.

The outer peripheral surface of the introducing pipe 103 and the through hole 10
Since there is no gap between 1b and 1b, only the refrigerant that has passed through the throttle hole 101a flows into the block B1. Similarly, since there is no gap between the outer peripheral surface of the introduction pipe 103 and the through hole 102a, only the refrigerant passing through the inside of the introduction pipe 103 flows into the block B2.

Next, FIG. 2 shows an example in which the inlet header section 6 is divided into three substantially even sections. FIG. 2 is a view similar to FIG. In this case, the inflow refrigerant distribution unit 200 includes three partition plates 201, 202, 203 and two introduction pipes 204,
205 is a main element.

The partition plates 201, 202 and 203 have a thin plate shape. This partition plate 201 is a region of the inlet header portion 6 into which the refrigerant flows, that is, the inlet header portion 6
Is fixed to the uppermost stream side (near the entrance) of the partition plates 202, 2
03 is fixed to a position where the inlet header portion 6 is divided into three substantially equal blocks in the stacking direction of the evaporator segment 3.

A diaphragm hole 201a and a through hole 201b are formed in the partition plate 201, and a through hole 202 is formed in the partition plate 202.
a, a through hole 203a is formed in the partition plate 203. The throttle holes 201a are provided in the blocks B3, B4, B4 of the inlet header section 6 separated by the partition plates 202, 203.
This is for allowing the refrigerant to flow into the block B3 located on the most upstream side of B5. The size and number of the diameter of the throttle hole 201a can be appropriately selected depending on the amount of the refrigerant flowing into the block B3 from the throttle hole 201a.

The inner diameters of the through holes 201b and 202a are equal to the outer diameter of the introducing pipe 204, and the through holes 201b and 202a
An introduction pipe 204 is passed through the inside of a. That is, the introduction pipe 2
One end of 04 is fixedly supported by the through hole 201b, and the other end of the introduction tube 204 is fixedly supported by the through hole 202a. Further, the inner diameter of the through hole 203 a is equal to the outer diameter of the introduction pipe 205, the introduction pipe 205 is coaxially arranged in the introduction pipe 204, and the introduction pipe 205
One end of is fixedly supported by the through hole 203a.

The inner diameters of the introduction pipes 204 and 205 can be appropriately selected according to the amount of the refrigerant flowing into the blocks B4 and B5 from the inlet header portion 6 located on the upstream side of the partition plate 201.

As a result, part of the refrigerant existing upstream of the partition plate 201 flows into the blocks B4 and B5 through the introduction pipes 204 and 205, respectively.

That is, since there is no gap between the outer peripheral surface of the introduction pipe 204 and the through hole 201b, only the refrigerant that has passed through the throttle hole 201a flows into the block B3. Similarly, since there is no gap between the outer peripheral surface of the introduction pipe 204 and the through hole 202a, the block B
Only the refrigerant that has passed inside the introduction pipe 204 and outside the introduction pipe 205 flows into the inside of the cylinder 4.
Further, since there is no gap between the outer peripheral surface of the introduction pipe 205 and the through hole 203a, the introduction pipe 205 is not provided in the block B5.
Only the refrigerant that has passed through the inside of the tank flows in. These introducing pipes 204 and 205 are not arranged coaxially as shown in FIG.
It is also possible to configure so that 05 respectively penetrates the partition plate 201.

FIG. 3 shows an example having another structure of the inflow refrigerant distribution means. FIG. 3 is a view similar to FIG. The inflow refrigerant distribution unit 300 is configured with two partition plates 301 and 302 and one distribution pipe 303 as main elements.

The partition plates 301 and 302 have a thin plate shape. The partition plate 301 is fixed to a region of the inlet header portion 6 where the refrigerant flows, that is, the most upstream side (near the inlet) of the inlet header portion 6, and the partition plate 302 positions the inlet header portion 6 in the stacking direction of the evaporator segments 3. And is fixed at a position where it is divided into two substantially equal blocks.

A diaphragm hole 301a is formed in the partition plate 301. The throttle hole 301a is for allowing the refrigerant to flow into the block B6 located upstream of the blocks B6 and B7 of the inlet header section 6 separated by the partition plate 302. The size and number of the diameter of the throttle hole 301a can be appropriately selected depending on the amount of the refrigerant flowing into the block B6 from the throttle hole 301a.

No holes or other penetrating portions are formed in the partition plate 302, and the blocks B6 and B7 are not formed.
Is completely divided by the partition plate 302.

The distribution pipe 303 connects the inlet header portion 6 located upstream of the partition plate 301 and the block B7, the right end of the inlet header portion 6 in FIG.
The inner diameter of the distribution pipe 303 can be appropriately selected depending on the amount of the refrigerant flowing into the block B7 from the inlet header portion 6 located on the upstream side of the partition plate 301.

As a result, a part of the refrigerant in the inlet header portion 6 located upstream of the partition plate 301 is partially throttled.
It is designed to flow into the block B6 through 1a. Further, a part of the refrigerant in the inlet header portion 6 located on the upstream side of the partition plate 301 flows into the block B7 through the distribution pipe 303.

Next, FIG. 4 shows an example in which the inlet header section 6 is divided into three substantially even sections. FIG. 4 is a view similar to FIG. In this case, the inflow refrigerant distribution unit 400 is configured by three partition plates 401, 402, 403 and one distribution pipe 404 as main elements.

The partition plates 401, 402, 403 have a thin plate shape. The partition plate 401 is a region of the inlet header portion 6 into which the refrigerant flows, that is, the inlet header portion 6
Is fixed to the uppermost stream side (near the entrance) of the partition plates 402, 4
03 is fixed to a position where the inlet header portion 6 is divided into three substantially equal blocks in the stacking direction of the evaporator segment 3.

A diaphragm hole 401a is formed in the partition plate 401. The throttle hole 401a is formed by the partition plates 402, 40.
Block B8 of the inlet header section 6 separated by
Block B8 located on the most upstream side of B9 and B10
It is for allowing the refrigerant to flow into the inside. This aperture 4
The size and number of the diameter of 01a can be appropriately selected according to the amount of the refrigerant flowing into the block B8 from the throttle hole 401a.

The partition plates 402 and 403 have no through portions such as holes formed therein, and blocks B8, B9 and B
10 is completely divided and divided by partition plates 402 and 403.

The distribution pipe 404 is composed of the inlet header section 6 and blocks B9, B10, which are located upstream of the partition plate 401.
In FIG. 3, the central portion and the right end of the inlet header portion 6 are communicated with each other. The inner diameter of the distribution pipe 404 can be appropriately selected according to the amount of the refrigerant flowing into the blocks B9 and B10 from the inlet header portion 6 located on the upstream side of the partition plate 401.

As a result, a part of the refrigerant in the inlet header portion 6 located upstream of the partition plate 401 is partially throttled.
It is designed to flow into the block B8 through 1a. Further, a part of the refrigerant in the inlet header portion 6 located upstream of the partition plate 401 flows into the blocks B9 and B10 through the distribution pipe 404.

By adopting the configuration as described above, approximately the same amount of refrigerant flows into each of the plurality of blocks divided by the partition plate.
That is, the refrigerant is allowed to flow into the upstream and downstream sides of the inlet header portion substantially evenly. By causing the substantially uniform refrigerant to flow into the upstream side and the downstream side of the inlet header portion, the refrigerant is supplied to the evaporator segments located on the downstream side of all the blocks.

Further, it is further advantageous if the even distribution to the respective refrigerant flow paths in each block and the uniform distribution from the distribution pipe to each block are appropriately adopted by using a known technique.

The present invention is not limited to the one in which the inlet header section 6 is divided into two and three blocks, and of course it is possible to divide it into four or more blocks if necessary. . Further, the present invention is not limited to the one in which the inlet header portion is divided into substantially equal sections, and may be 1: 2, 3: 1, 1: 2: from the upstream side as necessary.
The amount of the refrigerant flowing in each block can be freely adjusted in accordance with the division ratio, which can be appropriately selected such as 3: 2: 1: 2. Further, the size and the number of the throttle holes can be appropriately selected according to the amount of the refrigerant flowing from the throttle holes. Furthermore, the present invention is not limited to the above-mentioned drone cup type, but is of a four-hole type as shown in FIG. 5, that is, one end and the other end of the inlet side refrigerant flow path R1. First refrigerant inlet 11 and second refrigerant inlet 1 respectively
2 is formed, and the first refrigerant outlet 13 and the second refrigerant outlet 14 are provided at one end and the other end of the outlet side refrigerant flow path R2, respectively.
It can also be applied to a laminated evaporator in which flat plates 15 and 16 formed with are stacked to form an evaporator segment. Furthermore, the present invention is a refrigerant inlet 2 as shown in FIG.
It can also be applied to a laminated evaporator having a refrigerant flow path R3 that linearly connects 1 and the refrigerant outlet 22. Furthermore,
In the above-described embodiment, the case where the inlet header section 6 and the outlet header section 7 are located above has been described in the drawings, but it is also applicable to those where the inlet header section 6 and the outlet header section 7 are located below. There is no end.

[0049]

According to the laminated evaporator of the present invention and the air conditioner equipped with the laminated evaporator, the following effects can be obtained. That is, according to the laminated evaporator according to claim 1, the refrigerant reaches the downstream side as well as the upstream side of the inlet header portion sufficiently, so that the heat exchange efficiency can be improved and There is an effect that the temperature distribution of the blow-out temperature of the external fluid (for example, air) that has been heat-exchanged by this evaporator can be made uniform.

According to the laminated evaporator of the second aspect,
Since substantially the same amount of refrigerant flows into each block of the divided and divided inlet header section, the refrigerant can be uniformly flowed into each refrigerant flow path from each block,
The heat exchange efficiency can be further improved, and
This has the effect of making the temperature distribution of the blow-out temperature of the external fluid (for example, air) heat-exchanged by the evaporator more uniform.

According to the laminated evaporator of claim 3,
Refrigerant flows into the block located on the most upstream side through the throttle hole, and refrigerant flows into the other blocks via the introduction pipes provided in the inlet header section. The heat exchange efficiency can be improved without increasing the size of itself, and the temperature distribution of the external fluid (for example, air) heat-exchanged by this evaporator can be made uniform. There is an effect that can.

According to the laminated evaporator of the fourth aspect,
Refrigerant flows into the block located on the most upstream side through the throttle hole, and the refrigerant flows into the other blocks via the distribution pipes provided outside the inlet header section. The configuration can be simplified, and the refrigerant can be introduced to a desired position of each block.

According to the laminated evaporator of claim 5,
Since the flow of the refrigerant from the refrigerant inlet to the intermediate point of the refrigerant channel and the flow of the refrigerant from the intermediate point of the refrigerant channel to the refrigerant outlet are opposed to each other, heat was exchanged by this evaporator. This has the effect of making the temperature distribution of the external fluid (eg, air) blown out even more uniform.

According to the air conditioner of the sixth aspect, the refrigerant reaches the downstream side as well as the upstream side of the inlet header portion, so that the heat exchange efficiency can be improved and There is an effect that the temperature distribution of the blow-out temperature of the external fluid (for example, air) that has been heat-exchanged by this evaporator can be made uniform.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an inflow refrigerant distribution unit included in a laminated evaporator according to the present invention, in which (a) is a schematic view of a refrigerant as seen from above the evaporator; [Fig. 4] is a view of the schematic flow of the refrigerant as viewed from the front of the evaporator.

FIG. 2 is a view similar to FIG. 1, showing another embodiment of the inflow refrigerant distribution unit.

FIG. 3 is a view similar to FIG. 1, showing another embodiment of the inflow refrigerant distribution means.

FIG. 4 is a view similar to FIG. 1, showing still another embodiment of the inflow refrigerant distribution unit.

FIG. 5 is a four-hole type, that is, a first refrigerant inlet and a second refrigerant inlet are formed at one end and the other end of the inlet side refrigerant flow channel, respectively, and a first refrigerant inlet and the second refrigerant inlet are respectively at the one end and the other end of the outlet side refrigerant flow channel. FIG. 6 is an exploded perspective view of an evaporator segment configured by stacking flat plates on which a refrigerant outlet and a second refrigerant outlet are formed.

FIG. 6 is a schematic front view showing a two-hole type plate, that is, a flat plate in which a refrigerant flow path that connects a refrigerant inlet and a refrigerant outlet with a straight line is formed.

FIG. 7 is a perspective view showing an example of a conventional laminated evaporator.

8 is a diagram showing a schematic flow of a refrigerant flowing through the laminated evaporator of FIG. 7, (a) is a diagram of the evaporator seen from above, FIG.
(B) is the figure which looked at the evaporator from the front.

[Explanation of symbols]

1 flat plate 2 flat plates 3 evaporator segments 4 Refrigerant inlet 5 Refrigerant outlet 6 Entrance header section 6a Entrance header part 7 Exit header section 10 Multilayer evaporator 21 Refrigerant inlet 22 Refrigerant outlet 100 Inflow refrigerant distribution means 101 partition 101a aperture 101b through hole 102 partition plate 103 introduction tube 200 Inflow refrigerant distribution means 201 partition plate 201a aperture 201b through hole 202 partition plate 203 Partition plate 204 introduction tube 205 introduction tube 300 Inflow refrigerant distribution means 301 partition plate 301a aperture 302 Partition plate 303 minute piping 400 Inflow refrigerant distribution means 401 partition plate 401a aperture 402 Partition plate 403 Partition plate 404 minute piping B1 block B2 block B3 block B4 block B5 block B6 block B7 block B8 block B9 block B10 block R Refrigerant flow path R1 refrigerant flow path R2 refrigerant flow path R3 refrigerant flow path

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshinori Watanabe             1 Takamichi, Iwatsuka-cho, Nakamura-ku, Nagoya-shi, Aichi               Mitsubishi Heavy Industries Nagoya Research Center (72) Inventor Yasumasa Kamoboji             3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi             Address Mitsubishi Heavy Industries Co., Ltd. (72) Inventor Koji Nakato             3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi             Address Mitsubishi Heavy Industries Co., Ltd. F-term (reference) 3L065 DA17

Claims (6)

[Claims] 1. An evaporation method in which a pair of drawn flat plates are overlapped with each other to form at least one refrigerant flow path between the flat plates adjacent to each other and substantially parallel to the longitudinal axis of the flat plates. A plurality of evaporator segments are connected in series, and the flat plate is formed with a refrigerant inlet and a refrigerant outlet that communicate with one end and the other end of the refrigerant channel, respectively, and the evaporator segments are stacked on each other. ,
In the laminated evaporator in which the refrigerant inlets are communicated with each other and the refrigerant outlets are communicated with each other to form an inlet header section and an outlet header section, respectively, the inlet header section includes the inlet header section. A multi-layer type evaporator, characterized in that it is divided into a plurality of blocks in the stacking direction of the evaporator segments and is provided with an inflow refrigerant distribution means capable of respectively injecting a refrigerant into each block. 2. The laminated evaporator according to claim 1, wherein the inflow refrigerant distribution unit divides the inlet header portion into substantially equal sections to form a plurality of blocks, and each of the blocks has a substantially divided shape. A laminated evaporator, which is configured so that an equal amount of refrigerant flows therein. 3. The laminated evaporator according to claim 1, wherein the inflow refrigerant distribution unit divides the partition plate provided near the inlet of the inlet header portion and the inlet header portion substantially evenly. A block which is formed by penetrating at least one partition plate that partitions and a partition plate provided in the vicinity of the inlet of the inlet header portion in the thickness direction thereof, and is located on the most upstream side of the plurality of blocks. At least one throttle hole for adjusting the amount of the refrigerant flowing therein, and a partition plate provided in the vicinity of the inlet of the inlet header portion, while penetrating through a through hole provided separately from the throttle hole, At least one introduction pipe for introducing a refrigerant into each of the blocks other than the block located on the most upstream side, and the multilayer evaporator. 4. The laminated evaporator according to claim 1, wherein the inflow refrigerant distribution unit divides the partition plate provided near the inlet of the inlet header portion and the inlet header portion substantially evenly. A block which is formed by penetrating at least one partition plate that partitions and a partition plate provided in the vicinity of the inlet of the inlet header portion in the thickness direction thereof, and is located on the most upstream side of the plurality of blocks. At least one throttle hole for adjusting the amount of the refrigerant flowing therein, and the inlet header portion located upstream of the partition plate provided near the inlet of the inlet header portion to the outside of the inlet header portion. And a distribution pipe for distributing the refrigerant through the introduction holes provided in the inlet header section corresponding to blocks other than the block located on the most upstream side, respectively. A laminated evaporator characterized in that 5. The laminated evaporator according to claim 1, wherein both the refrigerant inlet and the refrigerant outlet are provided on one side in the longitudinal direction of the evaporator segment, and the at least 1
A laminated evaporator, wherein the refrigerant flow path of the book is formed so as to make a U-turn on the other side of the evaporator segment. 6. An air conditioner comprising: the laminated evaporator according to claim 1; and a compressor for compressing a refrigerant.