JP6089172B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger, and more specifically, is formed by laminating a plurality of flat heat exchange tubes, and one of two communication holes formed in the laminate is a heat exchange medium inflow channel. In addition, the present invention relates to a heat exchanger in which the other is a flow path for heat exchange medium outflow.

  Conventionally, as this type of heat exchanger, a plurality of tubes 30 formed as flat hollow tubes having a thickness of 0.5 mm or less by a plate material formed of a stainless material having a thickness of 0.1 mm have an inner diameter. A second tube of a tube adjacent to the first tube is formed by forming a first tube having a length of 2.5 mm and a length of 0.8 mm and a second tube having an outer diameter of 2.5 mm and a length of 0.8 mm. There has been proposed a structure in which a micro heat exchanger is formed by joining in a state in which a tube portion is inserted (see, for example, Patent Document 1). With this configuration, the heat exchanger can be made smaller and lighter than those equipped with a header that allows refrigerant to flow in and out, and the micro heat exchanger can be easily assembled. And a micro heat exchanger with high heat exchange efficiency can be obtained.

JP 2007-263472 A

  However, in the heat exchanger, when a heat exchange medium such as cooling water is used, the heat exchange medium flowing in some heat exchange tubes is good due to vaporization of the heat exchange medium or gas such as mixed air. The flow is hindered and the heat exchange capacity of the heat exchanger may be reduced. In particular, in the case of an extremely small heat exchanger such as the above-described micro heat exchanger, it is remarkable that a good flow of the heat exchange medium is inhibited by gas such as vaporization or mixed air. Further, when a device incorporating a heat exchanger rotates in the horizontal direction or the vertical direction as its function, it is further difficult to eliminate gas such as vaporization and mixed air.

  The heat exchanger of the present invention suppresses that the good flow of the heat exchange medium in the heat exchange tube is hindered by the vaporized or mixed air, and suppresses the heat exchange capability of the heat exchanger from being lowered. The main purpose.

  The heat exchanger of the present invention employs the following means in order to achieve the main object described above.

The heat exchanger of the present invention is
A plurality of heat exchange tubes in which two through holes are formed in the vicinity of both ends in the longitudinal direction of a flat surface of a flat hollow tube are stacked so that corresponding through holes of adjacent heat exchange tubes are connected. One of the two communication holes formed by connecting the two through holes is used as a flow path for a heat exchange medium, and the other through hole of the two communication holes is used. A heat exchanger as a flow path for heat exchange medium,
Arranged inside the outflow channel, one end extends from the outflow port of the outflow channel, and the other end abuts the end of the outflow channel opposite to the outflow port or the end A connecting pipe which is arranged in the vicinity, and at one end is formed with an outflow part from which at least gas flows out from the inside;
It is characterized by providing.

  In the heat exchanger according to the present invention, the heat exchange medium flows into each heat exchange tube from the inflow channel, flows inside each heat exchange tube, and flows out from a gap between the communication tube in the outflow channel. . Among the plurality of stacked heat exchange tubes, the heat exchange tube disposed in the vicinity of the end opposite to the outflow channel outlet, that is, near the position farthest from the outflow channel outlet When a gas (for example, air) due to vaporization or mixing is present inside the heat exchange tube disposed in the gas, the gas is formed at the other end of the connecting tube disposed inside the outflow channel. It flows into the inflow part and is discharged from the outflow part through the connecting pipe. For this reason, in the heat exchange tube disposed in the vicinity of the position farthest from the outlet of the outflow passage, it is possible to suppress the hindering of the good flow of the heat exchange medium due to vaporization or mixed gas. . As a result, it can suppress that the heat exchange capability of a heat exchanger falls.

  In such a heat exchanger of the present invention, the connecting pipe may have an inflow hole as a through hole at a position near the outflow port in the outflow channel. In this way, if gas due to vaporization or mixing is present inside the heat exchange tube located near the outflow port in the outflow channel, the gas flows into the connecting pipe through the inflow hole. And can be discharged from the outflow part. As a result, in the heat exchange tube disposed in the vicinity of the outlet of the outflow channel, it is possible to prevent the good flow of the heat exchange medium from being hindered by the vaporized or mixed gas. As a result, it can suppress that the heat exchange capability of a heat exchanger falls. In particular, this function is effective when a heat exchanger is incorporated in a device that rotates or moves in the horizontal direction or the vertical direction. In such an apparatus, the vaporized or mixed gas accumulates vertically upward, so that it is arranged in the vicinity of the outlet for the heat exchange tube or the outflow passage arranged near the position farthest from the outflow passage outlet. This is because the accumulated gas tends to accumulate in either or both of the heat exchange tubes, but the accumulated gas flows into the communication tube from the inflow portion or the inflow hole of the communication tube and is discharged from the outflow portion.

  In the heat exchanger according to the present invention, a positioning portion that contacts the connecting pipe and positions the connecting pipe is formed in the through hole forming the outflow passage of the heat exchanging tube. , Can also be characterized. In this way, the connecting pipe can be positioned.

  Furthermore, in the heat exchanger according to the present invention, the outflow is formed as a box that is connected to the outflow port of the outflow channel and accommodates the outflow part of the connecting pipe, and has an opening inside the box. An outflow member to which a pipe is attached may be provided. The gas flowing out from the outflow part through the connecting pipe accumulates in the box, but the accumulated gas does not flow out of the outflow pipe until reaching the opening of the outflow pipe in the box. For this reason, it is possible to avoid the heat exchange medium mixed with gas from the heat exchanger until a certain amount of gas is accumulated. As a result, it is possible to suppress the accumulation of gas in the flow path of the heat exchange medium in the apparatus in which the heat exchanger is incorporated, and it is possible to prevent the heat exchange capacity from being lowered due to the accumulation of gas in the flow path of the heat exchange medium. can do. Here, the inner volume of the outflow member and the attachment position of the outflow pipe can sufficiently store the total amount of gas to be vaporized and mixed by using the service life, and the air accumulated by using the service life can be removed from the outflow pipe. Design so that it does not flow out.

  In the heat exchanger according to the aspect of the present invention including the outflow member, the outflow pipe may be characterized in that the opening is disposed at a substantially center inside the box. . In this way, even when the apparatus incorporating the heat exchanger rotates in the horizontal direction or the vertical direction, the gas accumulated in the outflow member flows out from the outflow pipe until it reaches approximately half of the internal volume of the outflow member. Can be suppressed.

  Further, in the heat exchanger according to the present invention having an outflow member, the outflow pipe is arranged so that one end abuts on the inner side of the box and the other end extends to the outside of the box. , Can also be characterized. In this way, the outflow pipe can be easily assembled to the outflow member and the outflow pipe can be easily fixed. In this case, the connecting pipe has an outflow portion for flowing gas inside the outflow member at one end, and the one end is disposed so as to contact the inside of the outflow box portion. Can also be characterized. In this way, the connecting pipe can be easily assembled and fixed.

It is a block diagram which shows the outline of a structure of the heat exchanger 20 of an Example. It is a block diagram which shows the outline of a structure when the heat exchanger 20 is seen from the B side of FIG. It is a block diagram which shows the outline of a structure when the heat exchanger 20 is seen from the C side of FIG. 2 is a configuration diagram showing an outline of a configuration of a heat exchange tube 30. FIG. FIG. 5 is a cross-sectional view showing a DD cross section of the heat exchange tube 30 in FIG. 4. It is sectional drawing which shows the EE cross section in FIG. 4 of the tube 30 for heat exchange. 3 is an enlarged view showing the vicinity of a flange portion 37a of the heat exchange tube 30 together with a connecting pipe 50. FIG. FIG. 3 is a configuration diagram showing an outline of a configuration of a communication pipe 50. It is a block diagram which shows the outline of a structure when the connecting pipe 50 is seen from the F side of FIG. FIG. 6 is a cross-sectional view of the outflow member 60 taken along the line GG in FIG. 3.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a heat exchanger 20 as one embodiment of the present invention, and FIG. 2 is a configuration showing an outline of the configuration when the heat exchanger 20 is viewed from the side B of FIG. FIG. 3 is a configuration diagram showing an outline of the configuration when the heat exchanger 20 is viewed from the C side in FIG. 1. The heat exchanger 20 according to the embodiment performs heat exchange between a heat exchange medium such as water flowing inside the laminated heat exchange tube 30 and a heat exchange medium such as air flowing between the adjacent heat exchange tubes 30. The heat exchange medium is configured as a heat exchanger that cools or heats the heat exchange medium from the heat exchange medium. As shown in the drawing, the upper surface plate, the lower surface, and both side surfaces of the laminated body in which a plurality of heat exchange tubes 30 are laminated. 22a, bottom plate 22b and side plates 24a, 24b are attached, the inflow pipe 26 is attached to the inflow passage 42 formed in the laminate, and the connecting pipe 50 is inserted into the outflow passage 44 formed in the laminate. The outflow member 60 is attached to the upper surface excluding the inflow pipe 26 and its vicinity of the upper surface plate 22a. In the embodiment, a heat exchanger 20 is incorporated in a theater spotlight device using a light emitting diode to cool the light emitting diode, cooling water is used as a heat exchange medium, and outside air (air) is used as a heat exchange medium. A case of using is described as a specific example.

  4 is a configuration diagram showing an outline of the configuration of the heat exchange tube 30, FIG. 5 is a cross-sectional view showing a DD cross section of the heat exchange tube 30 in FIG. 4, and FIG. 6 is a heat exchange tube 30. It is sectional drawing which shows the EE cross section in FIG. The heat exchanging tube 30 is basically a concave portion in which fins 33 are attached to the outer periphery by bending or punching a plate material made of stainless steel having a thickness of 0.1 mm or a plate material made of aluminum material having a thickness of 0.2 mm. A pair of tube members 31 formed as a flow path forming portion 32 having a shape are arranged so as to face each other, and abutting portions such as fins 33 are joined using brazing or the like. In the example, a heat exchange tube having a length of 120 mm, a width of 16 mm, and a thickness of 1.8 mm was obtained using a plate made of an aluminum material having a thickness of 0.2 mm.

  A through hole 36b in which a flange portion 36a is formed is formed at one end (left side in FIG. 4) of the flat surface of the heat exchange tube 30 in the longitudinal direction. A through hole 37b in which a flange portion 37a is formed is formed at the end (right side in FIG. 4). The through holes 36a and 37a constitute an inlet and an outlet for cooling water (heat exchange medium) to each tube, and when the heat exchanger tube 30 is laminated, the heat exchanger 20 is laminated. An inflow passage 42 and an outflow passage 44 for cooling water (heat exchange medium) are formed in communication with each other in the direction. In the embodiment, the through hole 36b is a circular hole having a diameter of 6 mm, and the through hole 37b is a circular hole having a diameter of 8 mm.

  A rib 34 is formed at the center in the longitudinal direction of the tube member 31 constituting the heat exchange tube 30. The rib 34 forms a joint between the pair of tube members 31 and suppresses deformation (swelling) of the tube due to the pressure of cooling water (heat exchange medium). Further, the tube member 31 is formed with embosses 35a to 35f protruding outward on both sides of the rib 34 at equal intervals. The embossings 35a to 35f are in contact with the embossings 35a to 35f of the adjacent heat exchange tubes 30, thereby suppressing the deformation of the tubes due to the pressure of the cooling water (heat exchange medium).

  FIG. 7 is an enlarged view showing the vicinity of the flange portion 37 a of the heat exchange tube 30 together with the connecting pipe 50. Three convex positioning portions 38a to 38c are formed in the flange portion 37a of the heat exchanging tube 30, and when the connecting pipe 50 is inserted, the contacting pipe 50 is abutted and positioned.

  FIG. 8 is a configuration diagram showing an outline of the configuration of the connecting pipe 50, and FIG. 9 is a configuration diagram showing an outline of the configuration when the connecting pipe 50 is viewed from the F side in FIG. The connecting pipe 50 is formed as a circular pipe having a length with which the lower end comes into contact with the lower surface plate 22b and the upper end comes into contact with the ceiling of the box of the outflow member 60 when the heat exchanger 20 is made of stainless steel or aluminum material. An inflow portion 52 is formed at the lower end so that the cross section is semicircular over the length L1, and an outflow portion is formed at the upper end so that the cross section is semicircular over the length L2. 56 is formed. For example, the length L1 of the inflow portion 52 is preferably about several times the thickness of the heat exchange tube 30. In the embodiment, the length L1 is about 10 mm, which is about five times the thickness of the heat exchange tube 30. . The length L2 of the outflow portion 56 will be described later. Further, the heat exchange tube 30 located below the inflow portion 52 of the connecting pipe 50 and in contact with the upper surface plate 22a when the heat exchanger 20 is configured, or the vicinity thereof, that is, the outflow channel. An inflow hole 54 as a through hole is formed at a position near the outflow port 44. The inflow hole 54 needs to have a diameter that allows air to flow in. In the embodiment, the inflow hole 54 is a circular hole having a diameter of 3 mm.

  As shown in FIGS. 1 and 2, the outflow member 60 is formed as a box by a plate material made of stainless steel or a plate material made of aluminum material, and includes an outflow pipe 64 at the approximate center on the back surface side in FIG. 1. 10 is a cross-sectional view of the outflow member 60 as seen from the GG cross section in FIG. The outflow pipe 64 is attached so that one end extends from the box of the outflow member 60 and the other end abuts on the inside of the box of the outflow member 60, and the other end from substantially the center. The side (right side in the figure) is formed so that the cross section is semicircular over the length L5. For this reason, the opening 66 inside the box of the outflow pipe 64 is about the center inside the box. In the example, the length of the outflow member 60 along the connecting pipe 50 (length L3 in FIG. 10) was 30 mm, and the length along the outflow pipe 64 (length L4 in FIG. 10) was 30 mm.

  The length L2 of the outflow part 56 of the communication pipe 50 will be described. The length L2 of the outflow portion 56 is such that the gas (for example, air) inside the outflow member 60 does not flow back to the heat exchange tube 30 in the vicinity of the lower surface plate 22b via the connecting pipe 50. About half of the length L3 is preferable. In the embodiment, the length L2 of the outflow portion 56 is 18.5 mm, which is slightly longer than half of the length L3 along the connecting pipe 50 of the outflow member 60. In the embodiment, 65 heat exchange tubes 30 having a thickness of 1.8 mm are stacked, the upper surface plate 22a and the lower surface plate 22b are 1.5 mm in thickness, and the length of the connecting tube 50 is 147 mm. did. That is, since the heat exchanger 20 of the embodiment is incorporated in a theater spotlight device, a small heat exchanger having a height of 150 mm, a width of 120 mm, and a thickness (horizontal width in FIG. 2) of FIG. did.

  Next, the function of the heat exchanger 20 of an Example is demonstrated. Consider a case where the heat exchanger 20 of the embodiment is incorporated in a theater spotlight device using a light emitting diode, and a fan is attached to the front or back side of FIG. The cooling water that has cooled the light emitting diode flows into the heat exchanger 20 from the inflow pipe 26 while being heated by the light emitting diode. The cooling water flows into each heat exchange tube 30 from the inflow channel 42, is cooled by heat exchange with the outside air, and flows out to the outflow channel 44, most of which is the connecting pipe 50 in the outflow channel 44. It flows into the outflow member 60 through the outside flow path, flows out from the outflow pipe 64, and is used again for cooling the light emitting diode. The theater spotlight device rotates not only in the horizontal direction but also in the vertical direction depending on the movement of the object to which the spotlight is applied and the change of the object. For this reason, the air vaporized by the heating of the cooling water or the air slightly mixed from the outside depends on the posture of the heat exchanger 20, but the heat near the lower surface plate 22b of the heat exchanger 20 (near the lower end in FIG. 1). It collects in the exchange tube 30 and the heat exchange tube 30 near the top plate 22a (near the upper end in FIG. 1). In the heat exchange tube 30 of the embodiment, the air accumulated in the heat exchange tube 30 in the vicinity of the lower surface plate 22 b flows into the communication pipe 50 from the inflow portion 52 of the communication pipe 50 and is carried to the outflow member 60. Further, the air accumulated in the heat exchange tube 30 in the vicinity of the upper surface plate 22 a flows into the communication tube 50 from the inflow hole 54 of the communication tube 50 and is carried to the outflow member 60. For this reason, the fall of the heat exchange capability by the air accumulating in the tube 30 for heat exchange, and the favorable flow of the cooling water in a tube being inhibited can be suppressed. Since the opening 66 of the outflow pipe 64 is arranged at the center of the box of the outflow member 60, the air accumulated in the outflow member 60 reaches about half of the internal capacity of the outflow member 60. 64 does not flow out. For this reason, when the cooling water mixed with air is used for cooling the light emitting diodes and then returns to the heat exchanger 20, a good flow of cooling water in the heat exchanging tube 30 is hindered by the mixed air. Can be avoided.

  According to the heat exchanger 20 of the embodiment described above, the end contacting the lower surface plate 22b inside the cooling water (heat exchange medium) outflow passage 44 formed by stacking the heat exchange tubes 30. By installing the connecting pipe 50 formed as an inflow part 52, the air accumulated in the heat exchange tube 30 in the vicinity of the lower surface plate 22 b can flow out to the outflow member 60 through the connecting pipe 50. As a result, air vaporized by heating the cooling water or air slightly mixed from the outside accumulates in the heat exchange tube 30 in the vicinity of the lower surface plate 22b and hinders a good flow of the cooling water (heat exchange medium). It can suppress, and it can suppress that the heat exchange capability of the heat exchanger 20 falls. In addition, since the inflow hole 54 is formed at the position of the heat exchanging tube 30 to which the upper surface plate 22a of the connecting pipe 50 is attached or at a position in the vicinity thereof, the air accumulated in the heat exchanging tube 30 near the upper surface plate 22a is communicated. It can flow out to the outflow member 60 through the pipe 50. As a result, air evaporated by heating the cooling water (heat exchange medium) or air slightly mixed from the outside accumulates in the heat exchange tube 30 in the vicinity of the upper surface plate 22a and a good flow of the cooling water (heat exchange medium) is obtained. It can suppress that it is inhibited and can suppress that the heat exchange capability of the heat exchanger 20 falls.

  Further, according to the heat exchanger 20 of the embodiment, the outflow member 60 is attached so as to include the outflow port of the outflow channel 44 and the outflow part 56 of the connecting pipe 50, and the opening 66 of the outflow pipe 64 is used for outflow. By disposing the member 60 at the center of the inside of the box, the amount of air accumulated in the outflow member 60 is accumulated in the outflow member 60 until it reaches about half of the internal capacity of the outflow member 60. The air can be prevented from flowing out from the outflow pipe 64. For this reason, the cooling water mixed with air flows out from the outflow pipe 64 and returns to the heat exchanger 20, so that a good flow of cooling water in the heat exchange tube 30 is hindered by the mixed air. The inconvenience can be avoided.

  Further, according to the heat exchanger 20 of the embodiment, the three convex positioning portions 38a to 38c are arranged so as to come into contact with the connecting tube 50 when the connecting tube 50 is inserted into the flange portion 37a of the heat exchanging tube 30. Therefore, the connecting pipe 50 can be easily positioned and the assembling property of the connecting pipe 50 can be improved.

  Further, according to the heat exchanger 20 of the embodiment, when the connecting pipe 50 is configured as the heat exchanger 20, the lower end is in contact with the lower surface plate 22 b and the upper end is in contact with the ceiling of the box of the outflow member 60. Since it formed as it is, the assembly | attachment of the connecting pipe 50 can be made easy. Further, since the outflow pipe 64 of the outflow member 60 is formed to have a length such that one end extends from the box of the outflow member 60 and the other end contacts the inside of the box of the outflow member 60. The assembly of 64 can be made easy.

  In the heat exchanger 20 of the embodiment, the inflow hole 54 is formed at the position of the heat exchanging tube 30 to which the upper surface plate 22a of the connecting pipe 50 is attached or at a position in the vicinity thereof. However, the inflow holes 54 may not be formed.

  In the heat exchanger 20 of the embodiment, the connecting pipe 50 is formed to have such a length that the lower end abuts on the lower surface plate 22b and the upper end abuts on the ceiling of the box of the outflow member 60 when the heat exchanger 20 is configured. However, since the upper end of the connecting pipe 50 only needs to reach the inside of the outflow member 60, the connecting pipe 50 is formed with a length such that the upper end contacts the ceiling of the box of the outflow member 60. It may not be.

  In the heat exchanger 20 of the embodiment, the three convex positioning portions 38 a to 38 c are formed so as to abut on the connecting pipe 50 on the flange portion 37 a of the heat exchanging tube 30. As long as the positioning is possible by contact, two convex positioning portions or four or more convex positioning portions may be formed. Further, since it is only necessary to position the connecting pipe 50, it is not necessary to form a positioning portion on the flange portions 37 a of all the stacked heat exchange tubes 30, and positioning portions are formed on the flange portions 37 a of some of the heat exchange tubes 30. It is good also as what is formed. Furthermore, it is good also as what does not form a positioning part in the flange part 37a of all the tubes 30 for heat exchange laminated | stacked. In this case, a positioning portion may be formed on the upper surface plate 22a or the lower surface plate 22b.

  In the heat exchanger 20 of the embodiment, the outflow pipe 64 of the outflow member 60 has a length in which one end extends from the box of the outflow member 60 and the other end contacts the inside of the outflow member 60. However, the other end of the outflow pipe 64 may not be formed as a length that contacts the inside of the box of the outflow member 60.

  In the heat exchanger 20 of the embodiment, the outflow member 60 is attached to the laminated body of the heat exchange tubes 30, but the outflow member 60 may not be provided. In this case, it is preferable to provide an air reservoir corresponding to the outflow member 60 at a position away from the laminated body of the heat exchange tubes 30 in the flow path of the heat exchange medium.

In the heat exchanger 20 of the embodiment, the heat exchanger 20 is incorporated in a theater spotlight device using a light emitting diode to cool the light emitting diode. However, the heat exchanger 20 is used for the theater. It is good also as what is integrated in apparatuses and facilities other than a spotlight apparatus.
The heat exchanger 20 of the embodiment exerts its function particularly when incorporated in a device or facility that rotates in a horizontal direction or a vertical direction.

  In the heat exchanger 20 of the embodiment, the rib 34 and the embosses 35a to 35f are formed as the heat exchange tube 30, but these may not be provided. Moreover, it is good also as what forms a wavy unevenness | corrugation in the surface of the tube 30 for heat exchange, and the fin 33, and it is good also as what attaches a fin between the tubes 30 for heat exchange.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the heat exchange tube 30 corresponds to a “heat exchange tube”, the inflow channel 42 corresponds to an “inflow channel”, and the outflow channel 44 corresponds to an “outflow channel”. The connecting pipe 50 corresponds to a “connecting pipe”. The outflow member 60 corresponds to an “outflow member”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the heat exchanger manufacturing industry and the like.

  20 heat exchanger, 22a top plate, 22b bottom plate, 24a, 24b side plate, 26 inflow pipe, 30 heat exchange tube, 31 tube member, 32 flow path forming part, 33 fin, 34 rib, 35a-35f embossing, 36a, 37a Flange part, 36b, 37b Through hole, 38a-38c Positioning part, 42 Inflow flow path, 44 Outflow flow path, 50 Connecting pipe, 52 Inflow part, 54 Inflow hole, 56 Outflow part, 60 Outflow member , 64 Outflow pipe, 66 opening.

Claims (5)

A plurality of heat exchange tubes in which two through holes are formed in the vicinity of both ends in the longitudinal direction of a flat surface of a flat hollow tube are stacked so that corresponding through holes of adjacent heat exchange tubes are connected. One of the two communication holes formed by connecting the two through holes is used as a flow path for a heat exchange medium, and the other through hole of the two communication holes is used. A heat exchanger as a flow path for heat exchange medium,
Arranged inside the outflow channel, one end extends from the outflow port of the outflow channel, and the other end abuts the end of the outflow channel opposite to the outflow port or the end Arranged in the vicinity, the one end is formed with an outflow part at least gas flows out from the inside, and the other end is formed with an inflow part into which at least the gas flows inward, and a connecting pipe formed ;
Connected to the outlet of the outflow channel and formed as a box that houses the one end of the connecting pipe, an outflow pipe having an opening disposed substantially at the center of the box is attached. An outflow member,
A heat exchanger comprising: The heat exchanger according to claim 1,
The connecting pipe has an inflow hole as a through hole at a position near the outflow port in the outflow channel,
A heat exchanger characterized by that. The heat exchanger according to claim 1 or 2,
The through hole forming the outflow passage of the heat exchange tube is formed with a positioning portion that contacts the connecting pipe and positions the connecting pipe.
A heat exchanger characterized by that. The heat exchanger according to any one of claims 1 to 3 ,
The outflow pipe is arranged so that one end abuts the inside of the box and the other end extends to the outside of the box.
A heat exchanger characterized by that. The heat exchanger according to claim 4 ,
The communication pipe is formed with an outflow portion for flowing gas inside the outflow member at the one end, and the one end is disposed so as to contact the inside of the outflow member .
A heat exchanger characterized by that.