JP6583141B2 - Parallel flow heat exchanger - Google Patents

Description

  The present invention relates to a parallel flow type heat exchanger including a pair of header pipes and a plurality of parallel heat exchange tubes connected to both header pipes.

  In general, a parallel flow type heat exchanger includes a pair of header pipes and a plurality of flat heat exchange tubes connected to both header pipes, and is widely used as an outdoor unit of an air conditioner. When this parallel flow type heat exchanger is used as an evaporator, the refrigerant flows in from the lower part of the heat exchanger and is discharged from the upper part.

  In this conventional parallel flow type heat exchanger, a plurality of heat exchange tubes are lined up and down, and divided into an upper heat exchange region and a lower heat exchange region by a partition plate that vertically partitions the space in the header pipe. The refrigerant flows through the lower heat exchange region, then turns in the header pipe, and flows to the upper heat exchange region. At that time, since the refrigerant flows in the vertical direction against the gravity in the header pipe, the liquid refrigerant in the gas-liquid two-phase refrigerant easily flows to the heat exchange tube located below, and the heat located above the upper heat exchange region. It is difficult to evenly distribute the refrigerant throughout the exchange tube.

  In response to the problem of the refrigerant diversion, the header pipe is provided with a pressure loss addition plate that divides the inside of the header pipe into a diversion space on the inflow opening side and a heat exchange tube side space along the longitudinal direction. There is known a heat exchanger in which measures are taken to allow a refrigerant to flow to an upper heat exchange tube by providing a plurality of minute openings communicating with the tube side space (see, for example, Patent Document 1).

  In the thing of patent document 1, the pressure loss addition board is being fixed by brazing in the header pipe.

  The header pipe is provided with a plurality of communication spaces communicating with the upper heat exchange region and the lower heat exchange region divided into a plurality of heat exchange tube groups, and corresponding communication between the upper heat exchange region and the lower heat exchange region. There is known a heat exchanger in which a space is connected by a communication pipe provided outside the header pipe to provide a bypass flow path so that a refrigerant flows through an upper heat exchange tube (see, for example, Patent Document 2).

JP 2014-126273 A JP 2012-163328 A

  However, in the thing of patent document 1, when inserting a pressure loss addition board in a header pipe and manufacturing by brazing, confirmation of brazing inside a header pipe and a micro opening to a pressure loss addition board There is a problem in the formation of the position, shape and the like. Therefore, if the brazing of the pressure loss application plate and the formation of the position and shape of the minute openings in the pressure loss application plate are insufficient, there is a concern that the refrigerant cannot be flown uniformly to the upper heat exchange tube.

  Moreover, in the thing of patent document 2, since a communicating pipe is connected outside the header pipe and the communicating pipe is connected to the header pipe to form a bypass passage, there is a concern that the passage resistance increases. is there. Furthermore, there is a concern that the heat exchange area must be reduced by the space of the communication pipe.

  The present invention has been made in view of the above circumstances, and can evenly distribute the refrigerant to the entire heat exchange tube located above the upper heat exchange region, and provide a bypass passage for refrigerant movement inside the header pipe. It is an object of the present invention to provide a parallel flow type heat exchanger that can be formed in a plural number and can reduce the passage resistance of the bypass flow path.

  In order to achieve the above object, a parallel flow heat exchanger according to the present invention includes a pair of header pipes facing left and right, a plurality of parallel heat exchange tubes connected to the two header pipes, A partition plate that vertically divides a space in one header pipe of both header pipes, an upper heat exchange region and a lower heat exchange region partitioned by the partition plate into the two header pipes and the plurality of heat exchange tubes, A parallel flow type heat exchanger comprising: an upper partition plate that divides the upper heat exchange region up and down and a lower partition plate that divides the lower heat exchange region up and down in the one header pipe. First and second refrigerant outlets are provided in the first and second upper space portions partitioned by the upper partition plate, and the first partition is partitioned by the lower partition plate. First and second refrigerant inflow ports are provided in the second lower space, and the other header pipe includes a plate member having a substantially U-shaped cross section connecting the heat exchange tube, and A hollow shape member joined to the opening side, and a refrigerant distribution channel is formed between the plate member and the hollow shape member, and the hollow shape member has a first parallel to the refrigerant distribution channel. A bypass channel and a second bypass channel are formed, and the refrigerant distribution channel includes a partition plate that partitions the upper heat exchange region and the lower heat exchange region, and the upper partition plate corresponding to the partition plate An upper partition plate that divides the upper heat exchange region into upper and lower first and second upper spaces, and the lower heat exchange region corresponding to the lower partition plate into upper and lower first and second lower spaces. A lower partition plate for partitioning is provided, and the first bypass channel is connected to the first bypass channel via a first communication port. 1 and communicates with the first upper space via a second communication port, and the second bypass flow path is a bypass corresponding to the upper partition plate and the lower partition plate. An upper space, an intermediate space, and a lower space are partitioned by the upper and lower partition plates for the flow path, and the intermediate space communicates with the second lower space through a third communication port, and the fourth space The second upper space communicates with the second upper space through a communication port (Claim 1).

  By configuring in this way, the refrigerant distribution flow path and the plurality of bypass flow paths can be formed by the plate member and the hollow member constituting the header pipe, and the refrigerant distribution flow path and the plurality of bypass flow paths are formed. It can be partitioned by a partition plate to make the flow of the refrigerant appropriate. Specifically, the refrigerant that has flowed into the first lower space from the first refrigerant inflow port passes through the first communication port from the first lower space below the lower heat exchange region through the first communication port. From the first refrigerant outlet through the second upper passage and through the first upper space above the upper heat exchange region via the second communication port. Discharged. On the other hand, the refrigerant that has flowed into the lower heat exchange region from the second refrigerant inflow port flows from the second lower space above the lower heat exchange region into the intermediate space of the refrigerant distribution channel, and flows into the refrigerant distribution flow. It goes up the path, flows through the second upper space below the upper heat exchange region via the fourth communication port, and is discharged from the second refrigerant outlet.

  In the present invention, the second communication port is formed by a large-diameter communication hole located on the upper side and a small-diameter communication hole located on the lower side in a portion corresponding to the first upper space, The four communication ports may be formed of a large-diameter communication hole located on the upper side and a small-diameter communication hole located on the lower side in a portion corresponding to the second upper space (claim 2).

  By comprising in this way, when a refrigerant | coolant flows preferentially above the 1st upper space of the upper side heat exchange area and the 2nd upper space of the upper side heat exchange area which were divided through the large diameter communicating hole, a small diameter communicating hole It is possible to prevent the accumulation of liquid on the lower side.

  Further, the second communication port is formed by a slit hole extending in the vertical direction at a portion corresponding to the first upper space, and the fourth communication port corresponds to the second upper space. You may form in the site | part by the slit hole extended to an up-down direction (Claim 3). In this case, it is preferable that the slit hole forming the second communication port is formed in an expanding taper shape from below to above (Claim 4).

  By comprising in this way, a refrigerant | coolant can be equally flowed through the several heat exchange tube in 1st upper space and 2nd upper space of an upper side heat exchange area | region. In this case, the slit hole forming the second communication port is formed in an expanding taper shape from the bottom to the top, thereby increasing the flow on the upper side of the liquid-phase refrigerant affected by gravity, The refrigerant distribution to the plurality of heat exchange tubes in one upper space can be made uniform.

  Further, in the present invention, the plate member is formed of a clad material bonded with a brazing material, the heat exchange tube is inserted into a slit hole provided in the plate member, and the hollow shape member is formed of the plate member. It is preferable to be joined via a brazing material in a state of being inserted into the opening.

  By comprising in this way, a heat exchange tube, the plate member which comprises a 2nd header pipe, and a hollow shape can be integrally formed by brazing joining.

  Further, in the present invention, the plate member is formed of a clad material bonded with a brazing material, the heat exchange tube is inserted into a slit hole provided in the plate member, and the hollow shape member is formed of the plate member. The partition plate, the upper partition plate, and the lower partition plate are disposed inside the plate member, and the bypass channel upper and lower partition plates are the second bypass flow of the hollow member. It is preferable to be joined via a brazing material in a state of being disposed in the road (claim 6).

  By comprising in this way, the heat exchanger tube, the plate member which comprises a header pipe, and a hollow shape material can be integrally formed by brazing joining, and the division board arrange | positioned inside a plate member, The upper partition plate and the lower partition plate can be integrally formed with the upper and lower partition plates for the bypass channel disposed in the bypass channel by brazing.

  Moreover, in this invention, it is preferable that the upper and lower partition plates for the bypass flow path have a shut-off portion that blocks the second bypass flow path of the hollow member and a circulation port that communicates the first bypass flow path. (Claim 7).

  By comprising in this way, the assembly | attachment of the upper part for lower flow paths and a lower partition board to a hollow profile can be made easy.

  In addition, in the present invention, the hollow shape member is formed in a substantially semicircular shape having a flat portion and an arc portion located on the opening side of the plate member, and is a partition wall orthogonal to the flat portion. Thus, it is preferable that the first bypass channel and the second bypass channel are formed, and the first to fourth communication ports are provided in the flat portion (claim 8).

  By comprising in this way, the effective cross-sectional area of the hollow shape material which comprises a header pipe can be made small, and channel resistance can further be reduced.

  According to this invention, since it is configured as described above, the following effects can be obtained.

  (1) According to the invention described in claim 1, the refrigerant can be evenly distributed to the entire heat exchange tube located above the upper heat exchange region, and a bypass channel for refrigerant movement is provided inside the header pipe. A plurality of them can be formed, and the passage resistance of the bypass channel can be reduced.

  (2) According to the invention described in claim 2, in addition to the above (1), the first upper space and the second upper space of the upper heat exchange region further partitioned through the large-diameter communication hole. When the refrigerant flows preferentially on the upper side, it is possible to prevent the liquid pool from being generated on the lower side by the small diameter communication hole.

  (3) According to the invention described in claim 3, since the refrigerant can flow evenly through the heat exchange tubes in the first upper space and the second upper space of the upper heat exchange region, the above (1) In addition, the refrigerant can be evenly distributed to the entire heat exchange tube. In this case, the slit hole that forms the second communication port is formed in a taper shape that expands from the bottom to the top, so that the refrigerant distribution to the plurality of heat exchange tubes in the first upper space is made uniform. Therefore, the refrigerant can be evenly divided into the entire heat exchange tube (claim 4).

  (4) According to the invention described in claim 5, since the heat exchange tube, the plate member constituting the second header pipe, and the hollow shape member can be integrally formed by brazing, A heat exchanger having the function 1) can be easily produced.

  (5) According to the invention described in claim 6, the heat exchange tube, the plate member constituting the header pipe, and the hollow member can be integrally formed by brazing and joined to the inside of the plate member. Since the partition plate, the upper partition plate, and the lower partition plate to be disposed, and the upper and lower partition plates for the bypass channel disposed in the bypass channel can be integrally formed by brazing, the above (1) The heat exchanger having the function can be easily manufactured.

  (6) According to the invention described in claim 7, since it is possible to facilitate the assembly of the upper and lower partition plates for the bypass flow path to the hollow shape member, in addition to the above (1) and (2) In addition, the heat exchanger can be easily manufactured.

  (7) According to the invention described in claim 8, since the effective cross-sectional area of the hollow shape member constituting the header pipe can be reduced and the flow path resistance can be further reduced, the (1) In addition to (4), the passage resistance of the bypass channel can be further reduced, and the heat exchanger can be easily manufactured.

It is a schematic sectional drawing (a) which shows an example of the parallel flow type heat exchanger which concerns on this invention, and an expanded sectional view (b) which follows the II line | wire of (a). It is a schematic sectional drawing which shows the flow from the 1st refrigerant | coolant inflow port of a refrigerant | coolant in this invention to a 1st refrigerant | coolant outflow port. It is a schematic sectional drawing which shows the flow from the 2nd refrigerant | coolant inflow port of a refrigerant | coolant in this invention to the 2nd refrigerant | coolant outflow port. The cross-sectional view (a) showing the flow of the refrigerant from the refrigerant distribution flow path to the first bypass flow path and the cross-sectional view (b) showing the flow of the refrigerant from the first bypass flow path to the refrigerant distribution flow path in this invention ). The cross-sectional view (a) showing the flow of the refrigerant from the refrigerant distribution flow path to the second bypass flow path and the cross-sectional view (b) showing the flow of the refrigerant from the second bypass flow path to the refrigerant distribution flow path in this invention (b) ). It is a disassembled perspective view which shows a heat exchange tube in this invention, a plate member, and a part of hollow profile in a cross section. It is a disassembled perspective view (a) which shows the state before attachment of the division board in this invention, and a cross-sectional perspective view (b) which shows the attachment state of a division board. It is a perspective view which shows a part of hollow shape material in this invention in a cross section. It is a disassembled perspective view which shows the attachment state of the partition plate for bypass in this invention. It is a perspective view which shows another form of the hollow shape material in this invention. It is a principal part schematic sectional drawing which shows the flow of the refrigerant | coolant using the hollow shape material shown in FIG. It is a perspective view which shows another form of the hollow shape material in this invention. It is a principal part schematic sectional drawing which shows the flow of the refrigerant | coolant using the hollow shape material shown in FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing the parallel flow type heat exchanger which concerns on this invention is demonstrated in detail based on an accompanying drawing. Here, the case where the parallel flow type heat exchanger according to the present invention is applied to an outdoor unit of an air conditioner will be described.

  As shown in FIG. 1, a parallel flow heat exchanger 1 (hereinafter referred to as a heat exchanger 1) according to the present invention includes a pair of aluminum or aluminum alloy (hereinafter referred to as aluminum) members facing each other as shown in FIG. Header pipes 11 and 12, a plurality of parallel flat heat exchange tubes 2 connected to both header pipes 11 and 12, and one of the header pipes 11 and 12 (hereinafter referred to as the first header pipe 11). A partition plate 3 that divides the space in the pipe 11 in the vertical direction, and an upper heat exchange region 4 and a lower heat exchange region 5 that are partitioned by the partition plate 3 into the header pipes 11 and 12 and the plurality of heat exchange tubes 2. Are provided.

  Here, for convenience of explanation, the number of heat exchange tubes 2 is set to twelve, and the interval between the heat exchange tubes is opened, but actually, the number of heat exchange tubes 2 is larger than this and the interval is also narrower. For example, 20 pieces are arranged in each of the upper heat exchange region 4 and the lower heat exchange region 5. The heat exchange tube 2 is formed of an aluminum extruded shape having a plurality of flow passages 2b partitioned by a partition wall 2a (see FIG. 4).

  The first header pipe 11 is provided with an upper partition plate 3a that partitions the upper heat exchange region 4 up and down, and a lower partition plate 3b that partitions the lower heat exchange region 5 up and down, and is partitioned by the upper partition plate 3a. The first lower space 11c portion provided with the first refrigerant outlet 14a and the second refrigerant outlet 14b in the first upper space 11a and the second upper space 11b and partitioned by the lower partition plate 3b. The first refrigerant inlet 13a and the second refrigerant inlet 13b are provided in the second lower space 11d. The first upper space 11a is located above the second upper space 11b, and the first lower space 11c is located below the second lower space 11d.

  In this case, the first header pipe 11 is formed of a cylindrical electric sewing tube made of aluminum, and the upper and lower opening ends are respectively closed by an end cap 6 made of aluminum. The partition plate 3, the upper partition plate 3 a, and the lower partition plate 3 b are formed of aluminum plate members, and the intermediate position between the longitudinal direction of the first header pipe 11 and the upper heat exchange region 4. And it inserts in the slit hole (not shown) provided in the intermediate position of the lower side heat exchange area | region 5, and is joined to the 1st header pipe 11 via the brazing material (brazing joining).

  The other header pipe 12 (hereinafter referred to as the second header pipe 12) is joined to an aluminum plate member 20 having a substantially U-shaped cross section connecting the heat exchange tube 2 and the opening side of the plate member 20. A hollow profile 30 formed of an extruded aluminum member, and a refrigerant distribution channel 40 (hereinafter referred to as distribution channel 40) is formed between the plate member 20 and the hollow profile 30. ing. The upper and lower open ends of the plate member 20 and the hollow shape member 30 are respectively closed by an end cap 7 made of aluminum.

  In this case, the plate member 20 is formed of a clad material bonded with a brazing material, and is formed in a substantially U-shaped cross section having a pair of side pieces 20b, 20b bent at both side ends of the flat base 20a. A slit hole 26 into which the end of the heat exchange tube 2 can be inserted is provided in the flat base 20a at equal intervals (see FIG. 4).

  The hollow shape member 30 is formed of an extruded shape member made of aluminum, and is formed into a substantially semicircular shape having a flat portion 31 and an arc portion 32 located on the opening side of the plate member 20, and a flat portion. A first bypass channel 41 and a second bypass channel 42 that are parallel to the distribution channel 40 are formed by the partition wall 33 that is orthogonal to 31.

  The distribution channel 40 includes a partition plate 21 that partitions the upper heat exchange region 4 and the lower heat exchange region 5, and the upper heat exchange region 4 corresponding to the upper partition plate 3a. And the upper partition plate 22 partitioned into the second upper space 23b and the lower heat exchange region 5 corresponding to the lower partition plate 3b into the upper and lower first lower spaces 25a and the second lower space 25b. A lower partition plate 24 is provided. The first upper space 23a is located above the second upper space 23b, and the first lower space 25a is located below the second lower space 25b.

  In this case, the partition plate 21, the upper partition plate 22, and the lower partition plate 24 are formed of aluminum members, and the partition plate 21 is a plate member as will be described with reference to the partition plate 21 in FIG. 5. The plate plate 20 is inserted through a partition plate slit hole 34 provided in the flat plate-shaped base portion 20a and is joined to the plate member 20 via a brazing material.

  The first upper space 11a of the first header pipe 11, the first upper space 23a of the distribution flow path 40, the heat exchange tube 2 connected to the first upper space 11a and the first upper space 23a The first upper heat exchange region 4a is formed in the second upper space 11b of the first header pipe 11, the second upper space 23b of the distribution channel 40, the second upper space 11b and the second upper space 11b. A second upper heat exchange region 4b is formed by the heat exchange tube 2 connected to the upper space 23b.

  Also, the first lower space 11c of the first header pipe 11, the first lower space 25a of the distribution flow path 40, and the heat exchange tube connected to the first lower space 11c and the first lower space 25a. 2 form a first lower heat exchange region 5a, and the second lower space 11d of the first header pipe 11, the second lower space 25b of the distribution flow path 40, and the second lower space. A second lower heat exchange region 5b is formed by 11d and the heat exchange tube 2 connected to the second lower space 25b.

  The first bypass channel 41 communicates with the first lower space 25a through the first communication port 43 provided on the lower side of the flat portion 31 of the hollow shape member 30, and It communicates with the first upper space 23a through a second communication port 44 provided on the upper side.

  On the other hand, the second bypass flow path 42 is divided into an upper space 47a, an intermediate space by a bypass flow path upper partition plate 45 and a bypass flow path lower partition plate 46 corresponding to the partition plate 21, the upper partition plate 22 and the lower partition plate 24, respectively. It is partitioned into a space 47b and a lower space 47c. The intermediate space 47 b communicates with the second lower space 25 b through a third communication port 48 provided below the intermediate portion of the flat portion 31 of the hollow shape member 30, and It communicates with the second upper space 23b via a fourth communication port 49 provided above the intermediate portion of the flat portion 31.

  In this case, as shown in FIG. 7, the bypass flow path upper partition plate 45 and the bypass flow path lower partition plate 46 are formed of a substantially semi-disc shaped aluminum member, and the second bypass flow plate A flow outlet 51 that communicates the blocking portion 50 that blocks the path 42 and the first bypass channel 41 is provided.

Next, the flow of the refrigerant will be described with reference to FIGS. 2A, 2B, 3A, and 3B.
<Flow of refrigerant flowing in from first refrigerant inlet>
The refrigerant that has flowed into the first lower space 11 c of the first header pipe 11 from the first refrigerant inlet 13 a flows through the first lower heat exchange region 5 a below the lower heat exchange region 5. , Flows into the first lower space 25 a of the second header pipe 12, flows from the first lower space 25 a into the first bypass passage 41 via the first communication port 43, and passes through the first bypass passage 41. The first refrigerant flows through the first upper heat exchange region 4a above the upper heat exchange region 4 through the second communication port 44 through the second communication port 44, and flows into the first upper space 11a. It discharges | emits from the outflow port 14a (refer FIG. 2A and 3A).

<Flow of refrigerant flowing in from second refrigerant inlet>
The refrigerant flowing into the second lower space 11d portion of the first header pipe 11 from the second refrigerant inflow port 13b flows through the second lower heat exchange region 5b above the lower heat exchange region 5. , Flows into the second lower space 25b of the second header pipe 12, flows from the second lower space 25b into the intermediate space 47b of the distribution flow path 40, and rises up the distribution flow path 40 to form the fourth communication It flows through the second upper heat exchange region 4b below the upper heat exchange region 4 through the port 49, flows into the second upper space 11b, and is discharged from the second refrigerant outlet 14b (see FIG. 2B and FIG. 2B). (See FIG. 3B).

  In the above embodiment, the case where there is one second communication port 44 and one fourth communication port 49 has been described. However, as shown in FIGS. 8 and 9, the second communication port is formed as a flat surface of the hollow shape member 30. The large diameter communication hole 44a provided on the upper side of the portion corresponding to the first upper space 11a in the portion 31a and the small diameter communication hole 44b provided on the lower side of the portion corresponding to the first upper space 11a. It may be formed. Further, the fourth communication port corresponds to the large-diameter communication hole 49a provided on the upper side of the portion corresponding to the second upper space 11b in the flat portion 31a of the hollow shape member 30, and the second upper space 11b. You may form by two of the small diameter communication holes 49b provided in the downward side of a site | part.

  With this configuration, the refrigerant flowing from the first refrigerant inflow port 13a ascends the first bypass passage 41 and is provided on the lower side with the large-diameter communication hole 44a provided on the upper side. It flows through the first upper space 11a on the upper side of the upper heat exchange region 4 through the small diameter communication hole 44b, and is discharged from the first refrigerant outlet 14a. Further, the refrigerant flowing in from the second refrigerant inflow port 13b rises in the second bypass flow path 42, and passes through the large diameter communication hole 49a provided on the upper side and the small diameter communication hole 49b provided on the lower side. Then, it flows through the second upper space 11b below the upper heat exchange region 4 and is discharged from the second refrigerant outlet 14b.

  Accordingly, when the refrigerant preferentially flows above the first upper space 11a and the second upper space 11b of the upper heat exchange region 4 partitioned through the large diameter communication holes 44a and 49a, the small diameter communication hole 44b. 49b can prevent a liquid pool from being generated on the lower side.

  Further, as shown in FIGS. 10 and 11, the second communication port is formed by a slit hole 44c extending in the vertical direction at a portion corresponding to the first upper space 11a in the flat portion 31a of the hollow shape member 30. May be. Moreover, you may form a 4th communicating port in the slit hole 49c extended in an up-down direction in the site | part corresponding to the 2nd upper space 11b. In this case, the slit hole 44c forming the second communication port is formed in an expanding taper shape from the bottom to the top. The slit hole 49c that forms the fourth communication port may also be formed in an expanding taper shape from the bottom to the top.

  With this configuration, the refrigerant flowing from the first refrigerant inflow port 13a ascends the first bypass channel 41, and the first upper side of the upper heat exchange region 4 through the slit hole 44c. It flows evenly to the plurality of heat exchange tubes 2 in the upper space 11a and is discharged from the first refrigerant outlet 14a. At this time, since the slit hole 44c is formed in an expanding taper shape from the lower side to the upper side, the flow on the upper side of the liquid-phase refrigerant affected by the gravity is increased so that the refrigerant flows into the first upper space. It can be evenly distributed to the plurality of heat exchange tubes 2 in 11a.

  In addition, the refrigerant flowing in from the second refrigerant inflow port 13b rises in the second bypass flow path 42, and a plurality of refrigerants in the second upper space 11b on the lower side of the upper heat exchange region 4 through the slit holes 49c. The heat exchange tube 2 flows uniformly and is discharged from the second refrigerant outlet 14b.

  Accordingly, since the refrigerant can be evenly flowed to the plurality of heat exchange tubes 2 in the first upper space 11a and the second upper space 11b of the upper heat exchange region 4, the refrigerant is evenly divided into the entire heat exchange tube 2. can do.

  According to the heat exchanger 1 of the embodiment of the present invention, the distribution channel 40, the first bypass channel 41, and the second bypass are constituted by the plate member 20 and the hollow shape member 30 constituting the second header pipe 12. The flow path 42 can be formed, and the distribution flow path 40 is partitioned into an upper space 47a, an intermediate space 47b, and a lower space 47c by the partition plate 21, the upper partition plate 22, and the lower partition plate 24, and a plurality of second channels 2 bypass flow passages 42 are partitioned by the first and second partition plates 45 and 46 for the bipal flow passage, so that the flow of the refrigerant can be made appropriate, so that the heat located above the upper heat exchange region 4 The refrigerant can be evenly distributed to the entire exchange tube 2.

  Further, since a plurality of first bypass channels 41 and second bypass channels 42 can be formed in the second header pipe 12 for bypassing the refrigerant, the passage resistance of the bypass channels can be reduced. The heat exchange area can be increased by the space of the bypass pipe.

  Further, the plate member 20 constituting the heat exchange tube 2, the first header pipe 11, and the second header pipe 12 and the hollow member 30 can be integrally formed by brazing and joining the plate member 20. The partition plate 21, the upper partition plate 22 and the lower partition plate 24 arranged on the inner side and the bypass flow path upper and lower partition plates 45 and 46 disposed in the second bypass flow path 42 are integrally joined by brazing. Therefore, the heat exchanger can be easily manufactured.

2 heat exchange tube 3 partition plate 3a upper partition plate 3b lower partition plate 4 upper heat exchange region 4a first upper heat exchange region 4b second upper heat exchange region 5 lower heat exchange region 5a first lower heat exchange Area 5b Second lower heat exchange area 11 First header pipe (one header pipe)
11a 1st upper space 11b 2nd upper space 11c 1st lower space 11d 2nd lower space 12 2nd header pipe (other header pipe)
13a First refrigerant inlet 13b Second refrigerant inlet 14a First refrigerant outlet 14b Second refrigerant outlet 20 Plate member 21 Partition plate 22 Upper partition plate 23a First upper space 23b Second upper space 24 Lower partition plate 25a First lower space 25b Second lower space 26 Slit hole 30 Hollow member 31 Flat portion 32 Arc portion 33 Partition wall 34 Slit hole 40 for partition plate insertion Distribution channel (refrigerant distribution channel) )
41 1st bypass flow path 42 2nd bypass flow path 43 1st communicating port 44 2nd communicating port 44a Large diameter communicating hole (2nd communicating port)
44b Small-diameter communication hole (second communication port)
44c Slit hole (second communication port)
45 Upper partition plate for bypass channel 46 Lower partition plate for bypass channel 47a Upper space 47b Intermediate space 47c Lower space 48 Third communication port 49 Fourth communication port 49a Large-diameter communication hole (fourth communication port)
49b Small-diameter communication hole (fourth communication port)
49c Slit hole (fourth communication port)
50 Blocking part 51 Distribution port

Claims (8)

A pair of header pipes facing left and right, a plurality of parallel heat exchange tubes connected to the two header pipes, and a partition plate for vertically partitioning a space in one header pipe of the two header pipes; A parallel flow type heat exchanger comprising the upper heat exchange region and the lower heat exchange region partitioned by the partition plates into the two header pipes and the plurality of heat exchange tubes,
The one header pipe is provided with an upper partition plate that partitions the upper heat exchange region up and down, and a lower partition plate that partitions the lower heat exchange region up and down, and the first and first partitions partitioned by the upper partition plate First and second refrigerant outlets are provided in the upper space part of the second, and first and second refrigerant inlets are provided in the first and second lower space parts partitioned by the lower partition plate,
The other header pipe comprises a plate member having a substantially U-shaped cross section connecting the heat exchange tube, and a hollow member joined to the opening side of the plate member, and the plate member and the hollow member A refrigerant distribution flow path is formed between the first and second bypass flow paths, which are parallel to the refrigerant distribution flow path.
The refrigerant distribution flow path includes a partition plate that partitions the upper heat exchange region and the lower heat exchange region, and upper and lower first and second upper portions corresponding to the upper partition plate. An upper partition plate that partitions the space, and a lower partition plate that partitions the lower heat exchange region into upper and lower first and second lower spaces corresponding to the lower partition plate,
The first bypass flow path communicates with the first lower space through a first communication port, and communicates with the first upper space through a second communication port,
The second bypass channel is partitioned into an upper space, an intermediate space, and a lower space by upper and lower bypass plates corresponding to the upper partition plate and the lower partition plate, and the intermediate space is a third space Communicated with the second lower space through the communication port and communicated with the second upper space through the fourth communication port;
A parallel flow type heat exchanger characterized by that. In the parallel flow type heat exchanger according to claim 1,
The second communication port includes a large-diameter communication hole located on the upper side and a small-diameter communication hole located on the lower side in a portion corresponding to the first upper space, and the fourth communication port includes A parallel flow heat exchanger comprising a large-diameter communication hole located on the upper side and a small-diameter communication hole located on the lower side in a portion corresponding to the second upper space. In the parallel flow type heat exchanger according to claim 1,
The second communication port is formed by a slit hole extending in the vertical direction at a site corresponding to the first upper space, and the fourth communication port is formed at a site corresponding to the second upper space. The parallel flow type heat exchanger is formed by a slit hole extending in the vertical direction. In the parallel flow type heat exchanger according to claim 3,
The parallel-flow heat exchanger according to claim 1, wherein the slit hole forming the second communication port is formed in an expanding taper shape from below to above. In the parallel flow type heat exchanger according to any one of claims 1 to 4,
The plate member is formed of a clad material bonded with a brazing material, the heat exchange tube is inserted into a slit hole provided in the plate member, and the hollow shape material is inserted into an opening of the plate member. The parallel flow type heat exchanger is characterized by being joined via a brazing filler metal. In the parallel flow type heat exchanger according to any one of claims 1 to 4,
The plate member is formed of a clad material bonded with a brazing material, the heat exchange tube is inserted into a slit hole provided in the plate member, and the hollow shape material is inserted into an opening of the plate member. The partition plate, the upper partition plate, and the lower partition plate are disposed inside the plate member, and the upper and lower partition plates for the bypass channel are disposed in the second bypass channel of the hollow member. A parallel flow type heat exchanger characterized in that it is joined via a brazing filler metal. In the parallel flow type heat exchanger according to claim 1 or 6,
The parallel flow type, wherein the upper and lower partition plates for the bypass flow path have a blocking portion that blocks the second bypass flow path of the hollow member and a flow port that communicates the first bypass flow path. Heat exchanger. In the parallel flow type heat exchanger according to any one of claims 1 to 7,
The hollow shape member is formed in a substantially semicircular shape having a flat portion and an arc portion located on the opening side of the plate member, and the first bypass flow is defined by a partition wall orthogonal to the flat portion. A parallel flow heat exchanger, characterized in that a passage and a second bypass flow path are formed, and the first to fourth communication ports are provided in the flat portion.

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