JP6506049B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger used in an air conditioner.

  The heat exchanger constituting the evaporator (or condenser) used for the refrigeration cycle includes a core in which a plurality of tubes and a plurality of fins are alternately stacked, and a header to which the ends of the tubes are connected What is known. The refrigerant is taken into the inside from the inlet provided in the inflow header, passes through the tube while exchanging heat with air by heat transferred to the core, and is then discharged to the outside from the outlet provided in the outflow header .

  Generally, since the evaporator used for the air conditioner has a multi-flow structure in which the refrigerant is distributed from one header to a plurality of tubes, equalization of refrigerant distribution (ratio of gas component to liquid component of refrigerant) is made uniform Is required. When the distribution of refrigerant is uneven, the heat transfer area of the portion with a small amount of liquid component is reduced, which leads to the deterioration of the performance of the evaporator.

  In patent document 1, in order to eliminate the bias | inclination of the refrigerant | coolant distribution in an evaporator, the insertion mechanism is provided in each inflow port of the several refrigerant | coolant flow path in a tube. The insertion mechanism acts as a throttle for the refrigerant flowing from the inflow header (refrigerant distributor). By providing the insertion mechanism in the vicinity of the inlet of each refrigerant flow path in the tube, the inflow header can be adjusted to equalize the flow rate flowing into each refrigerant flow path, and the refrigerant distribution can be made uniform. As a result, the heat exchange performance of the heat exchanger is improved.

Patent No. 5147894

When the heat exchanger is used as an evaporator, the refrigerant which flows from the inflow header into the refrigerant flow passage of the tube and flows out of the refrigerant flow passage into the outflow header on the downstream side once is the refrigerant flow in the plurality of downstream tubes It may be made to flow again into the passage to perform heat exchange. In this case, since the refrigerant flowing into the refrigerant flow path in the downstream side tube is easily influenced by the flow velocity of the refrigerant, the head difference, and the like, the refrigerant distribution tends to be biased. Then, the heat exchange rate in the downstream side tube becomes insufficient, and the heat exchange performance of the heat exchanger is lowered. Therefore, it is desirable to equalize the refrigerant distribution of the refrigerant flowing from the outflow header into the refrigerant flow passage of the downstream side tube.
Patent Document 1 does not propose refrigerant distribution in a configuration in which the refrigerant flowing out of the outflow header is made to flow into the downstream side tube for heat exchange.
Then, an object of this invention is to provide the heat exchanger which can improve heat exchange performance by preventing the bias | inclination of refrigerant | coolant distribution by the downstream side of the refrigerant | coolant flow path in a tube.

The heat exchanger of the present invention made for the above purpose has a first header provided at one end with a refrigerant inlet into which the refrigerant flows, and a plurality of first headers into which the refrigerant flowing into the first header is distributed and flows a tube, a second header refrigerant flowing through the first tube flows is provided inside the first tube, e Bei a stirring chamber for stirring the refrigerant flowing from the first tube to the second header, the first The tube is provided on the upstream side of the flow of the refrigerant from the closed portion that closes the end of the flow path of the first tube and the closed portion, and communicates the flow path with the outside of the first tube, and the refrigerant flows out An outlet portion, the first tube including an upper surface portion extending from an end portion of the first outlet portion located downstream of the flow of the refrigerant to the closing portion, and a lower surface portion opposed to the upper surface portion; The chamber comprises at least an upper surface and a lower surface, and It is provided between one outflow portion, characterized in that.
As described above, the stirring chamber for stirring the refrigerant flowing into the second header from the first tube is provided, and by mixing the gas component and the liquid component of the refrigerant, the imbalance of the refrigerant distribution of the refrigerant flowing into the second header is prevented. can do. In this manner, the refrigerant having the refrigerant distribution equalized is distributed from the second header and flows through the tube constituting the downstream heat exchange element, thereby improving the heat exchange rate by the downstream heat exchange element. Thus, the heat exchange performance of the entire heat exchanger can be improved.

Agitation chamber, Ru provided inside the first tube. The first tube is provided on the closing portion closing the end of the flow path of the first tube, and on the upstream side of the flow of the refrigerant than the closing portion, and communicates the flow path with the outside of the first tube, and the refrigerant flows out a first outlet portion, provided with a stirring chamber Ru provided between the closing portion and the first outlet portion.

The stirring chamber can also be provided outside the first tube. In this case, the first tube is provided with a tube outlet in which the end of the flow path of the first tube is opened, and the stirring chamber is the inside of the stirring container surrounding the tube outlet and the refrigerant flowing out of the tube outlet The second embodiment can be provided between the collision wall in which the first collision occurs and the second outflow portion in which the refrigerant that has collided with the collision wall flows out toward the inside of the second header.
For example, even in the case of using the first tube in which both ends of the flow path are opened, the gas component and the liquid component of the refrigerant are mixed by providing the stirring chamber outside the downstream end of the first tube. The same effect can be obtained as in the case of using the first tube which can be discharged into the 2 header and the end of the flow path is closed.

The first outflow portion can allow the refrigerant to flow upward from the agitation chamber toward the second header.
Further, by arranging a plurality of first tubes in the vertical direction, as a buffer of the refrigerant flowing out the first outlet portion or these first tubes positioned below is avoided, first tube disposed above The dimensions of the second header in the second header can be shorter than the first tube disposed on the lower side. With this configuration, the flow of the refrigerant into the downstream tube can be smoothed in the second header, and the heat exchange rate of the downstream heat exchange element can be further improved.

The present invention can also include a plurality of second tubes in which the refrigerant flowing into the second header is distributed and flows, and a third header in which the refrigerant flowing through the second tubes merge.
The stirred refrigerant can be distributed from the second header and flow through the second tube to improve the heat exchange rate of the downstream heat exchange element including the second tube.
Furthermore, according to the present invention, the first header and the third header are integrally configured via a partition body that divides both, and the refrigerant flowing into the first header is the first tube, the second header, and the second tube. And the third header can be made to flow in order.
By integrally forming the third header in which the refrigerants flowing through the second tube join together with the first header, it is not necessary to provide the third header separate from the first header, and for the miniaturization of the heat exchanger Also contribute.

  According to the heat exchanger of the present invention, the heat exchange performance of the heat exchanger can be improved by preventing the deviation of the refrigerant distribution on the downstream side of the first tube.

It is a front view which shows schematic structure of the heat exchanger of this invention. The lower stream side of the 1st tube of a 1st embodiment and the 2nd header are shown partially, (a) is a top view and (b) is an AA sectional view of (a). The downstream side of the 1st tube of 1st Embodiment is shown, (a) is a top view, (b) is a side view, (c) is a BB sectional view of (a). (A) A cross-sectional view showing the refrigerant mixed at the downstream end of the first tube of the first embodiment and discharged to the second header, (b) a cross-sectional view showing the refrigerant flowing out of the conventional tube . It is sectional drawing which shows the shape of the outflow port of this invention. It is sectional drawing which shows partially the downstream of the 1st tube of 2nd Embodiment, and a 2nd header. The downstream side of the 1st tube of 3rd Embodiment and the mixing container are shown, (a) is a top view, (b) is a front view of the downstream end of the 1st tube, (c) is a C- of (a) C sectional drawing, (d) is sectional drawing which shows the flow of the refrigerant which is stirred in the inside of a stirring container through a refrigerant | coolant flow path, and is flowed out to a 2nd header. It is a figure which shows schematic structure of the heat exchanger which can apply this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
First Embodiment
<Overall Configuration of Heat Exchanger 1>
As shown in FIG. 1, the heat exchanger 1 of the present embodiment includes a core C1 including a plurality of first tubes 10 (10a, 10b, 10c, and 10d) through which a refrigerant flows and a plurality of fins 30, and a second A core C2 formed by alternately stacking a tube 20 (20a, 20b, 20c, 20d) and a plurality of fins 40, and a first end to which one end (left end in the figure) of the first tube 10 and the second tube 20 is connected A header 50 and a second header 60 connected to the other end (right end in the figure) of the first tube 10 and the second tube 20 are used to perform heat exchange of the refrigerant by the heat transmitted to the cores C1 and C2 It is.
In the heat exchanger 1, the upstream header 54 of the first header 50 described later, the core C1, and the second header 60 described later form the lower first block A, and the downstream side of the first header 50 The header 55, the core C2, and the second header 60 form an upper second block B.

<Core configuration>
The first tube 10 and the second tube 20 are made of copper or copper alloy, or aluminum or aluminum alloy, and a member having a rectangular cross section having a plurality of hollow portions produced by extrusion molding or roll forming a plate-like material Tube). The heat exchanger 1 is arrange | positioned in order of the 1st tube 10, the 2nd tube 20 from the lower side of the height direction. One end of the first tube 10 and the second tube 20 is connected to the first header 50. The other ends of the first tube 10 and the second tube 20 are connected to a second header 60. Thereby, the inside of the first header 50, the inside of the first tube 10, the inside of the second tube 20, and the inside of the second header 60 are communicated, and the refrigerant can flow. This connection is usually made by brazing. In addition, the cross-sectional shape of the 1st tube 10 and the 2nd tube 20 may be not only a rectangle but circular, and another shape.
The fins 30, 40 are made of the same material as the first tube 10 and the second tube 20, and in the present embodiment, corrugated fins are used which are formed by roll forming or the like, but the invention is not limited thereto. Types of fins may be used.
The core C1 formed of the first tube 10 and the fins 30 and the core C2 formed of the second tube 20 and the fins 40 are stacked in the height direction of the heat exchanger 1. The cores C1 and C2 are sealed at both longitudinal ends by side plates (not shown). The side plates function as reinforcing members for the cores C 1 and C 2, and both ends thereof are supported by the first header 50 and the second header 60.

<Structure of First Header>
The first header 50 has a cylindrical shape, and the internal space is a flow path of the refrigerant. The upper end and the lower end of the first header 50 are provided with caps not shown. The cap on the lower end side of the first header 50 is provided with an inlet 51 (refrigerant inlet) into which the refrigerant is introduced, and the cap on the upper end side is provided with an outlet 52 from which the refrigerant is discharged.
In the first header 50, a partition plate (partition body) 53 extending in the width direction is provided substantially at the center in the longitudinal direction. The partition plate 53 divides the inside of the first header 50 into the lower upstream header 54 and the upper downstream header 55 (third header).
The first tube 10 is connected to the upstream header 54, and the second tube 20 is connected to the downstream header 55. Since the partition plate 53 is provided between the upstream header 54 and the downstream header 55, there is no direct movement of the refrigerant between them.

<Configuration of second header>
The second header 60 has a cylindrical shape in which the upper end and the lower end are closed, and the internal space is a flow path of the refrigerant. The first tube 10 and the second tube 20 are connected to the second header 60. Since the second header 60 does not have a partitioning body for partitioning the space in the header, such as the partitioning plate 53 of the first header 50, the refrigerant flowing out of the first tube 10 is not included in the second header 60. Move freely inside.

<Structure of tube>
As described above, the first tube 10 and the second tube 20 are flat tubes formed by extrusion molding, roll molding or the like, and the wide surfaces (upper surface S1 and lower surface S2, see FIG. 2) are made to face each other Are arranged. In the heat exchanger 1 of the present embodiment, as shown in FIG. 1, four first tubes 10 (10a, 10b, 10c, 10d) and four second tubes 20 (20a, 20b, 20c, 20d) are arranged. However, the number of tubes is not limited to this.

Inside the first tube 10, as shown in FIGS. 2B and 3A, a plurality of refrigerant flow paths 12a to 12e extending in the longitudinal direction of the first tube 10 are formed in parallel. Although five refrigerant channels 12 a to 12 e are formed in the first tube 10 of the present embodiment, the number of refrigerant channels is not limited to this. In addition, although the opening shape of the refrigerant channels 12a to 12e is circular, it may be another cross-sectional shape such as a triangle, a trapezoid or a rectangle.
Although illustration is abbreviate | omitted about the 2nd tube 20, several refrigerant | coolant flow paths extended in a longitudinal direction are formed in parallel similarly to the 1st tube 10 also inside the 2nd tube 20. As shown in FIG.

The first tube 10 is open at an upstream end (not shown) to be inserted into the first header 50. On the other hand, as shown in FIG. 2A, the downstream end 14 (end) of the first tube 10 inserted into the second header 60 is closed by the closing member 13 (closing portion).
The closure member 13 may be made of copper or a copper alloy, or aluminum or an aluminum alloy similarly to the first tube 10, and may be attached to the downstream end 14 of the first tube 10 by brazing. Alternatively, the closure member 13 can be formed integrally with the first tube 10.

In the first tube 10, as shown in FIG. 2 (a), an arc-shaped outlet 15 is formed between the junction 16 joined with the second header 60 by brazing and the downstream end 14. A (first outlet) is provided. As shown in FIG. 3, the outlet 15 has a predetermined depth in the width direction of the upper surface S1 of the first tube 10 with a metal saw or the like so that the refrigerant channels 12 a to 12 e of the first tube 10 partially open upward. It is formed by cutting as much as possible.

As shown in FIG. 3, the space between the outlet 15 and the closing member 13 which is inside the refrigerant channels 12 a to 12 e of the first tube 10 flows from the upstream end to the downstream end 14. A mixing chamber MR (stirring chamber) in which a gas component and a liquid component of the refrigerant are mixed by collision of the refrigerant flowing toward the closing member 13 with the closing member 13.

The second tube 20 is open at both the downstream end (not shown) inserted into the first header 50 and the upstream end (not shown) inserted into the second header 60.

<Flow of refrigerant>
The refrigerant composed of the gas component and the liquid component flows from the refrigerant circuit (not shown) into the upstream header 54 through the inlet port 51 of the first header 50. Thereafter, the refrigerant flows from the upstream header 54 into the refrigerant channels 12 a to 12 e from the opening of the upstream end of the first tube 10. As shown in FIG. 4A, the refrigerant flows toward the downstream end 14 of the first tube 10, collides with the closing member 13, and the gas component and the liquid component are mixed in the mixing chamber MR. It flows out to the inside of the 2nd header 60 from the outflow port 15 located in the side.

The refrigerant having flowed out of the outlet 15 into the second header 60 flows into the plurality of refrigerant channels of the second tubes 20 from the opening at the upstream end of the second tube 20 inserted into the second header 60. Flows out of the opening at the downstream end of the second tube 20 inserted into the first header into the inside of the downstream header 55 of the first header 50. The refrigerant which has flowed out to the inside of the downstream header 55 is discharged from the outlet 52 of the downstream header 55 toward a refrigerant circuit (not shown).

As described above, in the present embodiment, the refrigerant flowing through the first tube 10 is agitated to collide with the closing member 13 provided at the downstream end portion 14, and the gas component and the liquid component are mixed. Thereafter, since the mixed refrigerant flows out from the outflow port 15, it is possible to prevent the uneven distribution of the refrigerant flowing from the second header 60 into the second tube 20. Thereby, the heat exchange rate in the core C2 composed of the downstream second tube 20 and the fins 40 can be improved, and the heat exchange performance of the entire heat exchanger 1 can be improved.
Further, the refrigerant collided with the closing member 13 is made to flow out from the outlet 15 opened upward on the upper surface S1 of the first tube 10, so that the second header 60 of the refrigerant in which the gas component and the liquid component are mixed is mixed. A flow directed towards it (directed towards the opening of the second tube 20) can be promoted.

On the other hand, the first tube 1000 of the conventional heat exchanger is inserted not only in the upstream end portion inserted into the upstream first header but also into the second header 60, as shown in FIG. 4 (b). The downstream end 1400 is also open. Therefore, the refrigerant flowing in the flow path formed in the first tube 1000 flows out of the opening 1300 of the downstream end portion 1400 into the second header 60 while the ratio of the gas component and the liquid component is biased. The refrigerant flows into the refrigerant flow path in the downstream second tube. As a result, the heat exchange rate at the downstream core consisting of the second tube and the fins decreases.

In addition, the outflow port 15 formed in the first tube 10 is not limited to the arc-shaped one. For example, the outflow port 15 may be V-shaped as shown in FIG. 5A, or may be rectangular.
Moreover, the outflow port 15 may be provided on both the upper surface S1 and the lower surface S2 of the first tube 10, as shown in FIG. 5 (b). By setting the outflow direction of the refrigerant in which the gas component and the liquid component are mixed to be a plurality of upward and downward directions, mixing of the refrigerant is promoted, and further, the outflow of the mixed refrigerant into the second header 60 is Can also be promoted.
Furthermore, the outflow port 15 can also be provided on the side surfaces S3 and S4 of the first tube 10. In this case, as shown in FIG. 5C, the outlet 15 is formed on both the side surface S3 in communication with the refrigerant flow passage 12a and the side surface S4 in communication with the refrigerant flow passage 12e. You may form so that all the refrigerant flow paths 12a-12e may be penetrated. Further, the outlet 15 is formed only on the side surfaces S3 and S4 communicating with the refrigerant channel 12a and the refrigerant channel 12e, and the refrigerant channel 12b to 12d is not provided with the outlet 15 and the closing member 13. The downstream end 14 is opened only at a portion corresponding to 12b to 12d, and the refrigerant is an outlet 15 of the side surfaces S3 and S4 of the first tube 10 and an opening at the downstream end of the refrigerant flow paths 12b to 12d. , May be formed to flow out.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG.
In the second and subsequent embodiments, points different from the items described in the previous embodiments will be mainly described. The same reference numerals are given to the same components as those described in the above-described embodiment.

  The second embodiment is characterized in that the first tubes 100 are arranged such that the lengths of the first tubes 100 (100a, 100b, 100c) in the second header 60 are different from each other. As shown in FIG. 6, the first tubes 100 a to 100 c are configured to avoid the outflow direction of the refrigerant flowing out from the outlet 15 of the first tube 100 located on the side closer to the lower end of the second header 60. A first tube 100 located on the side closer to the upper end of 60 is disposed. That is, the dimension of the longitudinal direction in the inside of the 2nd header 60 becomes short in order of the 1st tube 100a from the lower end side of the 2nd header 60, the 1st tube 100b, and the 1st tube 100c.

Specifically, for example, in the first tube 100b, the position of the closing member 13 of the first tube 100b is such that the refrigerant flowing out from the outlet 15 of the first tube 100a does not interfere with the lower surface S2 of the first tube 100b. It is preferable that the first tube 100a is disposed on the upstream side of the extension line from the center 151 of the outlet 15 of the first tube 100a. More preferably, in the first tube 100b, the position of the closure member 13 of the first tube 100b is an extension from the upstream end 152 of the outlet 15 of the first tube 100a or an upstream side of the extension Arranged as.
The same applies to the first tube 100c.
In the present embodiment, three first tubes 100a to 100c are disposed as the first tube 100, but the number of first tubes 100 is not limited to this.

  With such a configuration, the flow of refrigerant inside the second header 60 of the refrigerant that has collided with the closing member 13 of the first tubes 100a to 100c and is mixed with the gas component and the liquid component and flows out from the outflow port 15 is promoted. Ru. Thereby, the inflow of the refrigerant into the downstream second tube (not shown) can be facilitated, and the heat exchange rate in the downstream core including the second tube can be further improved, and thus the heat exchange of the entire heat exchanger Performance can be improved.

In the present embodiment, the second tubes may be arranged such that the lengths of the plurality of second tubes in the second header 60 are different from each other. In this case, the second tube located at the uppermost end of the second header 60 is provided such that the opening at its upstream end faces the outlet 15 of the first tube 100 a, and the lower end of the second header 60 is The closest second tube is provided such that the opening at its upstream end faces the outlet 15 of the adjacent first tube 100. The 2nd tube pinched by these 2nd tubes is provided so that the opening of the downstream side end may counters outlet 15 of the 1st tubes 100b-100c. As in the case of the first tubes 100a to 100c, the closing member and the outlet opened downward may be provided on the upstream side of the plurality of second tubes. In this case, the second tubes may be provided such that the outlets of the plurality of second tubes face the outlets 15 of the corresponding first tubes 100a to 100c.
By providing the second tube as described above, the refrigerant flowing out of the first tubes 100 a to 100 c can more smoothly flow into the second tube.

Third Embodiment
Next, a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, among the plurality of first tubes 110, only the first tube 110a located on the side closest to the lower end of the second header 60 will be described. It is configured in the same manner as the one tube 110a.

<Structure of tube>
Similar to the first tubes 10 and 100 of the first embodiment and the second embodiment, the plurality of first tubes 110 of the third embodiment have a plurality of refrigerant flow paths 112a to 112e extending in the longitudinal direction in parallel. (FIG. 7 (b)). In addition, although five refrigerant flow paths 112a-112e are provided in the 1st tube 110 of this embodiment, the number of refrigerant flow paths is not limited to this.
The first tube 110a is open at the upstream end portion inserted into the first header 50 (not shown). Further, the first tube 110a is open at the downstream end 113 (terminal end) to be inserted into the second header 60 (openings 114a, 114b, 114c, 114d, 114e, tube outlet parts).

<Configuration of mixing container>
A mixing vessel 140 (stirring vessel) covering the downstream end 113 is provided on the downstream side of the first tube 110a. As shown in FIG. 7, the mixing container 140 has a rectangular shape in a plan view and a sectional view, and is formed in a size that fits inside the second header 60 (FIG. 7 (d)). The mixing container 140 has a connection wall 141 joined at the joint portion 116 with the outer periphery of the first tube 110a, a collision wall 142 facing the downstream end 113 of the first tube 110a, a connection wall 141, and a collision wall 142. A top wall 143 connecting the upper ends in the longitudinal direction, a pair of side walls (not shown) connecting the connection wall 141 and the short end of the collision wall 142, and a bottom wall 144 facing the top wall 143; It consists of

The top wall 143 is provided with an outlet 145 (second outlet) from which the refrigerant flows out toward the inside of the second header 60. The outlet 145 is preferably rectangular in a plan view, and the dimension in the longitudinal direction is preferably larger than the dimension in the width direction of the first tube 110a, but the configuration is not limited thereto. If it is, it may be circular or elliptical instead of rectangular, and the dimension in the longitudinal direction may be equal to or smaller than the dimension in the width direction of the first tube 110a.
Inside the mixing vessel 140, the refrigerant flowing through the refrigerant flow paths 112a to 112e and flowing out from the openings 114a to 114e (tube outflow portion) collides with the collision wall 142 and is agitated, and the gas component and the liquid component of the refrigerant are mixed. Mixing chamber MR.

The mixing vessel 140 may be made of copper or copper alloy, or aluminum or aluminum alloy, and may be attached to the outer periphery of the first tube 110 by brazing, similarly to the first tube 110.

<Flow of refrigerant>
The refrigerant flowing from the upstream header (not shown) of the first header flows into the refrigerant channels 112 a to 112 e from the opening of the upstream end of the first tube 110. The refrigerant flows toward the openings 114a to 114e of the refrigerant flow paths 112a to 112e, flows out to the inside of the mixing container 140, collides with the collision wall 142, and is agitated, as shown in FIG. 7C. The gas component and the liquid component are mixed by MR. Thereafter, the mixture flows out of the outlet 145 of the mixing container 140 into the inside of the second header 60.

  In the first embodiment and the second embodiment, the downstream end portions 14 of the plurality of first tubes 10, 100 are closed by the closing member 13, and the refrigerant is caused to collide with the closing member 13 and is stirred. The gas component and the liquid component were mixed in the mixing chamber MR in 12 e and flowed out from the outlet 15. On the other hand, in the third embodiment, the downstream end 113 of the first tube 110 (110a) is opened, and the refrigerant is allowed to flow out from the openings 114a to 114e, and then the refrigerant is separated from the first tube 110. It is possible to prevent the bias of the refrigerant distribution by causing the refrigerant to collide and stir at the collision wall 142 of a certain mixing container 140 and mixing the gas component and the liquid component and letting them flow out from the outlet 145 of the mixing container 140 did. In this way, even when using the first tube 110 with the downstream end opened, the same as when the end of the first tube is closed by attaching the separate mixing container 140 to the side of the end. You can get the effect.

In addition to the above, the configurations described in the above embodiment can be selected or changed to other configurations as appropriate without departing from the spirit of the present invention.
The said embodiment demonstrated the structure of the heat exchanger by which the 1st block A provided with the core C1 and the 2nd block B provided with the core C2 overlap, and are arrange | positioned in the height direction. However, for example, as shown in FIG. 8, a first block A1 including a core C3 including first tubes 2100 a to 2100 d and fins 2030, a first header 2500, and a second header 2600, and The structure of the present invention is applied to a heat exchanger 2000 in which a second block B1 consisting of a core C4 consisting of two tubes 2200a to 2200d and fins 2040 and a third header 2800 and a fourth header 2700 are arranged side by side It can apply. Specifically, the downstream end of the first tubes 2100a to 2100d is closed with a closing member, the mixing chamber MR of the above embodiment is provided, and the refrigerant in which the gas component and the liquid component are mixed is discharged from the outlet It flows into the inside of the header 2600. Thereby, it is possible to prevent the uneven distribution of refrigerant distribution from the second header 2600 to the second tubes 2200a to 2200d via the fourth header 2700, and to improve the heat exchange rate in the core C2 The heat exchange performance of the heat exchanger 2000 can be improved.

1 and 2000 Heat exchangers 10, 100, 110 and 2100 1st tube 12a, 12b, 12c, 12d, 12e, 112a, 112b, 112c, 112d, 112e refrigerant channel 13 closing member (closing portion)
14, 113 downstream end (termination)
15 outlet (first outlet)
16 junctions 20, 20a, 20b, 20c, 20d second tubes 30, 40 fins 50 first header 51 inlet (refrigerant inlet)
52 Discharge port 53 Partition board (partition body)
54 upstream header 55 downstream header (third header)
60 second header 114, 114a, 114b, 114c, 114d, 114e opening (tube outlet)
116 junction 140 mixing vessel (stirred vessel)
141 connection wall 142 collision wall 143 top wall 144 bottom wall 145 outlet (second outlet)
2000 heat exchanger 2500 first header 2600 second header 2700 fourth header 2800 third header A, A1 first block B, B1 second block C1, C2, C3, C4 core MR mixing chamber (stirring chamber)
S1 upper surface S2 lower surface S3, S4 side surface

Claims (5)

A first header provided at one end with a refrigerant inlet into which the refrigerant flows;
A plurality of first tubes in which the refrigerant flowing into the first header is distributed and flows;
A second header into which the refrigerant flowing in the first tube flows;
The first provided in the tube, e Bei and a stirring chamber for stirring the coolant flowing into the second header from the first tube,
The first tube is
A closed portion closing the end of the flow path of the first tube;
A first outflow portion provided on the upstream side of the flow of the refrigerant than the closed portion, communicating the flow path with the outside of the first tube, and flowing out the refrigerant;
The first tube includes an upper surface extending from an end of the first outlet located downstream of the flow of the refrigerant to the closed portion, and a lower surface facing the upper surface.
The stirring chamber includes at least the upper surface portion and the lower surface portion, and is provided between the closed portion and the first outflow portion.
A heat exchanger characterized by The first outlet is
Causing the refrigerant to flow upward from the stirring chamber towards the second header;
The heat exchanger according to claim 1 . The plurality of first tubes are vertically arranged,
As the buffer of the coolant flowing out the first outlet portion or al of the first tube positioned below it is avoided,
The dimension in the second header of the first tube disposed on the upper side is shorter than the first tube disposed on the lower side
The heat exchanger according to claim 2 . A plurality of second tubes in which the refrigerant flowing into the second header is distributed and flows;
And a third header where refrigerant flowing through the second tube merges.
The heat exchanger according to any one of claims 1 to 3 . The first header and the third header are integrally configured via a partitioning body that divides the two,
The refrigerant flowing into the first header flows in the order of the first tube, the second header, the second tube, and the third header.
The heat exchanger according to claim 4 .

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