JP6507840B2 - Connecting member and heat source machine - Google Patents

Description

  The present invention relates to a connection member and a heat source machine, and more particularly to a connection member for connecting a heat exchanger, an exhaust unit and a drain container to each other, and a heat source machine provided with the same.

  As an example of a heat source machine, a heat exchanger (secondary heat exchanger) for recovering sensible heat and latent heat (latent heat held by water vapor in combustion gas) of combustion gas to enhance thermal efficiency It has been put to practical use. In this latent heat recovery type heat source machine, the water vapor in the combustion gas is condensed and condensed by being deprived of the latent heat, so a large amount of drain (condensed water) is generated in the secondary heat exchanger. Since the combustion gas contains nitrogen oxides etc., it dissolves in the drain and the drain becomes acidic.

  The drain passes from the heat exchanger (secondary heat exchanger) to the neutralizer (drain container) through the inside of the connection member connecting the heat exchanger (secondary heat exchanger) and the neutralizer (drain container). Sent to The drain sent to the neutralizing device (drain container) is neutralized by the neutralizing agent contained in the neutralizing device (drain container).

  For example, in JP 2011-206632 A (Patent Document 1), a heat exchanger (secondary heat exchanger) and a neutralizing device (drain container) are connected by an upstream drain piping member (connection member). A heat source machine is described. Further, in this heat source unit, the heat exchanger (secondary heat exchanger) is connected to the exhaust port, and the combustion gas having passed through the heat exchanger (secondary heat exchanger) is exhausted through the exhaust port.

JP, 2011-206632, A

  In recent years, since the heat source unit has been miniaturized, the internal space of the heat source unit has become narrow. For this reason, the space which can be used when connecting a connection member to a heat exchanger (secondary heat exchanger) and a neutralization device (drain container) is also narrow. Therefore, it is difficult to connect the connecting member to the heat exchanger (secondary heat exchanger) and the neutralizing device (drain container).

  Moreover, the drain generated by the heat exchanger (secondary heat exchanger) flows into the exhaust part provided with the exhaust port. A connecting member is connected to the exhaust unit and the neutralizing device (drain container) in order to send the drain that has flowed into the exhaust unit to the neutralizing device (drain container). That is, the connection member is connected to the heat exchanger (secondary heat exchanger), the exhaust unit, and the neutralizing device (drain container). Therefore, the work of connecting the connecting members to the heat exchanger (secondary heat exchanger), the drain container and the exhaust part is more difficult.

  The present invention has been made in view of the above problems, and an object thereof is to provide a connecting member and a heat source machine which can easily connect the heat exchanger, the exhaust unit and the drain container in a narrow space. is there.

  The connection member of the present invention connects the heat exchanger, the exhaust unit, and the drain container to each other. The heat exchanger generates drain by recovering the latent heat of the combustion gas. In the exhaust part, the drain flows in from the heat exchanger together with the combustion gas. The drain container is one into which the drain flows in from the heat exchanger and the exhaust part. The connection member is made of a flexible material. The connection member comprises a tubular portion, a first connection and a second connection. The first connection is disposed at one end of the tubular portion and is connected to the drain container. The second connection is disposed at the other end of the tubular portion and is connected to the exhaust. The tubular portion has a recess on the outer peripheral surface such that the cross section of the tubular portion is arc-shaped between one end and the other end. The connection member further comprises a third connection. The third connection extends from the recess and is connected to the heat exchanger.

  According to the connection member of the present invention, the tubular portion can be bent at the recess. For this reason, in a state in which any one of the first to third connection portions is connected, the other connection portion can be connected by bending the tubular portion with the recess. Therefore, in a narrow space, it is easy to connect the drain container to the first connection part, connect the exhaust part to the second connection part, and connect the heat exchanger to the third connection part.

  In the connection member described above, the thickness of the recessed portion of the tubular portion is thinner than the thickness of the portion other than the recessed portion of the tubular portion. Therefore, since the thickness of the portion of the recess is thin, the tubular portion can be easily bent by the recess.

  In the connection member, the recess includes a bottom surface, a first side surface rising from one end of the bottom surface, and a second side surface rising from the other end of the bottom surface. The first side portion and the second side portion are disposed to face each other. Therefore, the distance between the first side surface and the bottom and the distance between the second side and the bottom can be secured. Therefore, when the tubular portion is bent in the recess, the distance until the first side surface portion and the bottom surface portion contact and the distance until the second side surface portion and the bottom surface portion contact can be increased. Thereby, the tubular portion can be largely bent at the recess.

  In the connection member described above, the flexible material is rubber. The connecting member is integrally formed of rubber. Therefore, the tubular portion can be easily bent by the recess. Further, the drain can be prevented from leaking from the connection member.

  In the connection member described above, the first connection portion and the third connection portion extend in directions opposite to each other. The second connection portion extends in a direction in which the first connection portion and the third connection portion cross each other. The connecting member further comprises a seat. The seat portion is disposed between the second connection portion and the third connection portion, protrudes outward beyond the second connection portion, and the first connection portion and the third connection portion face each other. The second connection portion can be pushed in a direction intersecting the direction in which Therefore, by pushing the seat portion, the second connection portion can be pushed in the direction in which the first connection portion and the third connection portion intersect with each other. This facilitates the operation of connecting the second connection portion to the exhaust portion.

  The heat source machine according to the present invention includes the above-described connection member, a drain container connected to the first connection portion, an exhaust portion connected to the second connection portion, and heat exchange connected to the third connection portion. Equipped with a bowl. For this reason, it is possible to provide a heat source apparatus provided with a connecting member that facilitates the operation of connecting the heat exchanger, the exhaust unit, and the drain container to one another in a narrow space in the heat source apparatus.

  As described above, according to the present invention, it is possible to provide a connecting member and a heat source machine that can easily connect the heat exchanger, the exhaust unit, and the drain container in a narrow space.

It is the schematic which shows roughly the structure of the heat-source equipment in one embodiment of this invention. It is a front view which shows roughly the structure of the heat-source machine in one embodiment of this invention. It is the elements on larger scale which expand and show P1 part of FIG. It is the side view seen from the arrow direction of FIG. It is a perspective view which shows roughly the structure of the connection member in one embodiment of this invention. It is a front view of the connection member shown in FIG. It is sectional drawing in alignment with the VII-VII line of FIG. It is sectional drawing which follows the VIII-VIII line of FIG. It is a rear view of the connection member shown in FIG. It is sectional drawing in alignment with XX of FIG.

Hereinafter, embodiments of the present invention will be described based on the drawings.
First, the configuration of a heat source unit according to an embodiment of the present invention will be described. The heat source machine in the present embodiment is a latent heat recovery type heat source machine capable of recovering latent heat. Hereinafter, in the present embodiment, the neutralizing device is described as an example of the drain container, but the drain container may be a drain tank. That is, the drain container may be at least one of the neutralizer and the drain tank.

  With reference to FIG. 1 and FIG. 2, the heat source machine in the present embodiment includes a housing 1, a burner 2, a blower 3, a primary heat exchanger 4, and a secondary heat exchanger (heat exchanger) 5 mainly includes a neutralization device (drain container) 6, a controller 7, a hot water supply path 8, a connection member CM, a drain pipe DP, and an exhaust part EA.

  The housing 1 has a front face (front face) 1a, a pair of side faces 1b, an upper face 1c, a lower face 1d, and a rear face (back face) 1e shown in FIG. The front portion 1a is disposed in front of the heat source unit. The pair of side surface portions 1 b are respectively disposed on the pair of side surfaces of the heat source unit. The pair of side surface portions 1 b is disposed at both ends of the front surface portion 1 a in the width direction of the housing 1. The upper surface portion 1c constitutes the upper surface of the heat source unit. The lower surface portion 1d constitutes the lower surface of the heat source unit. The rear surface portion 1e constitutes the rear surface of the heat source unit.

  The direction in which the front surface portion 1a and the rear surface portion 1e face each other is the front-rear direction of the housing 1. The direction in which the pair of side surface portions 1b face each other is the width direction (left and right direction) of the housing 1. The direction in which the upper surface portion 1 c and the lower surface portion 1 d face is the vertical direction of the housing 1. The front-rear direction, the width direction, and the vertical direction of the casing 1 are based on the state where the heat source unit is installed.

  The housing 1 has a space surrounded by a front surface (front surface) 1a, a pair of side surfaces 1b, an upper surface 1c, a lower surface 1d and a rear surface (back surface) 1e. In this space, the burner 2, the blower 3, the primary heat exchanger 4, the secondary heat exchanger 5, the neutralizer 6, the controller 7, the hot water supply path 8, the connection member CM, the drain The pipe DP and a part of the exhaust part EA are accommodated.

  The front surface portion 1a of the housing 1 has an air intake port IP. The air intake port IP is for taking air into the housing 1 from the outside of the housing 1. The intake port IP penetrates the front surface portion 1a. A plurality of intake ports IP are provided.

  The front surface portion 1a of the housing 1 has an opening OP. The opening OP penetrates the front surface portion 1a. The exhaust part EA is inserted into the opening OP. The exhaust part EA protrudes outward from the front part 1a through the opening OP. The exhaust unit EA is configured to be capable of discharging the combustion gas to the outside of the housing 1. The exhaust part EA has an exhaust port EP for exhausting the combustion gas.

  The burner 2 is configured to be able to supply a combustion gas. The combustion gas is for heat exchange with the primary heat exchanger 4 and the secondary heat exchanger 5. The burner 2 is disposed at the center in the height direction of the housing 1.

  The blower 3 is for supplying the burner 2 with air for combustion. The blower 3 is configured to be able to blow the air taken into the housing 1 from the intake port IP to the burner 2. The blower 3 is disposed on the lower surface 1 d side (lower side) of the burner 2. In addition, the blower 3 is disposed closer to the lower surface 1 d side (lower side) than the primary heat exchanger 4 and the secondary heat exchanger 5. The blower 3 is, for example, a fan.

  The primary heat exchanger 4 is for recovering sensible heat of the combustion gas supplied by the burner 2. Each primary heat exchanger 4 has a heat transfer pipe capable of circulating water, which is a fluid to be heated, and a primary heat exchanger case 4a capable of accommodating the heat transfer pipe. The combustion gas flows around the heat transfer tube inside the primary heat exchanger case 4a.

  The secondary heat exchanger 5 is for recovering the latent heat of the combustion gas supplied by the burner 2. The secondary heat exchanger 5 generates a drain by recovering the latent heat of the combustion gas. The secondary heat exchanger 5 has a heat transfer pipe capable of circulating water, which is a fluid to be heated, and a secondary heat exchanger case 5a capable of accommodating the heat transfer pipe. The combustion gas flows around the heat transfer pipe inside the secondary heat exchanger case 5a.

  The primary heat exchanger 4 and the secondary heat exchanger 5 are connected to each other. The primary heat exchanger 4 is disposed on the lower surface 1 d side (lower side) of the secondary heat exchanger 5. Further, the primary heat exchanger 4 and the secondary heat exchanger 5 are disposed on the upper surface 1 c side (upper side) of the burner 2.

  The combustion gas after heat exchange in the primary heat exchanger 4 is passed to the secondary heat exchanger 5, whereby water as the fluid to be heated in the secondary heat exchanger 4 is preheated. As the temperature of the combustion gas falls to about 60 ° C. in this process, the water contained in the combustion gas condenses and the latent heat is recovered. And, by collecting the latent heat of the combustion gas, drain is generated.

  The neutralization device 6 is for neutralizing the drain generated by recovering the latent heat of the combustion gas in the secondary heat exchanger 5. The neutralization device 6 is one in which the drain flows in from the secondary heat exchanger 5 and the exhaust part EA. This drain becomes acidic because nitrogen oxides and the like in the exhaust gas are dissolved therein. The inside of the neutralizer 6 is filled with a neutralizer, which can neutralize the acid drain.

  The controller 7 is for controlling the burner 2 and the blower 3 and the like. The controller 7 is also for controlling a display unit (not shown) and the like. The controller 7 is electrically connected to each of the burner 2 and the blower 3.

  The hot water supply path 8 is for supplying the hot and cold water heat-exchanged with the combustion gas in the primary heat exchanger 4 and the secondary heat exchanger 5 to the outside of the heat source machine. The hot water supply path 8 has a water supply pipe 8a, a hot water supply pipe 8b, a water inlet IW, and a hot water outlet OW. The water supply pipe 8a is configured to be able to supply water, which is a fluid to be heated, to the secondary heat exchanger 5 from the water inlet IW. The hot water supply pipe 8b connects the primary heat exchanger 4 and the hot water outlet OW. The hot water supply pipe 8b is configured to be able to supply hot water warmed by the primary heat exchanger 4 and the secondary heat exchanger 5 from the primary heat exchanger 4 to the outlet OW. Thereby, when passing through the secondary heat exchanger 5 and the primary heat exchanger 4, the water supplied from the water inlet IW is heated by the combustion gas and supplied with hot water from the outlet OW.

  The exhaust unit EA is connected to the secondary heat exchanger 5. The exhaust part EA is connected to the burner 2 via the primary heat exchanger case 4 a of the primary heat exchanger 4 and the secondary heat exchanger case 5 a of the secondary heat exchanger 5. The combustion gas supplied from the burner 2 passes through the exhaust part EA through the primary heat exchanger case 4 a of the primary heat exchanger 4 and the secondary heat exchanger case 5 a of the secondary heat exchanger 5 to the exhaust port EP Are discharged to the outside of the housing 1. In the exhaust part EA, a drain flows in from the secondary heat exchanger 5 together with the combustion gas.

  The connecting member CM mutually connects the exhaust part EA, the secondary heat exchanger 5 and the neutralizing device 6. The connection member CM is configured to allow drain to flow therethrough. The drain generated in the secondary heat exchanger 5 flows into the neutralizer 6 through the inside of the connection member CM. In addition, the drain generated in the secondary heat exchanger 5 flows into the exhaust part EA. The drain that has flowed into the exhaust portion EA also flows into the neutralizer 6 through the inside of the connection member CM.

  The drain pipe DP connects the neutralization device 6 and the drain outlet DO. The drain neutralized by the neutralizer 6 is drained out of the housing 1 from the drain outlet DO through the drain pipe DP.

  The configurations of the exhaust part EA and the connection member CM will be described in detail with reference to FIGS. 3 and 4. In FIG. 3 and FIG. 4, the housing 1 is indicated by a broken line, and the members accommodated inside the housing 1 are indicated by a solid line, for the sake of easy viewing.

  The exhaust unit EA has an exhaust port EP, a front surface EF, a flange EL, and a side wall ES. The exhaust part EA has a space surrounded by the side wall ES between the front face EF and the flange EL. The exhaust port EP is for exhausting the combustion gas. The exhaust port EP penetrates the front face EF. The exhaust port EP is formed at the center of the front face EF.

  The front surface EF is disposed at a position projecting from the front surface portion 1 a of the housing 1 to the opposite side to the rear surface portion 1 e. The flange EL has an outer diameter larger than the outer diameter of the front face EF. The flange EL is disposed along the front surface portion 1 a inside the housing 1. The side wall ES connects the outer peripheral end of the front surface EF and the inner peripheral end of the flange EL. The side wall ES is inserted into the opening OP.

  The connection member CM mainly includes a tubular portion 10, a first connection portion 11, a second connection portion 12, and a third connection portion 13. The first connection 11 is connected to the neutralizer 6. The outer peripheral surface of the first connection portion 11 is tightened by the first fastener LP1 in a state of being externally fitted to the attachment portion of the neutralization device 6. The second connection portion 12 is connected to the exhaust portion EA. The outer peripheral surface of the second connection portion 12 is tightened by the second fastener LP2 in a state of being externally fitted to the attachment portion of the exhaust portion EA. The third connection portion 13 is connected to the secondary heat exchanger 5. The outer peripheral surface of the third connection portion 13 is tightened by the third fastener LP3 in a state of being externally fitted to the attachment portion of the secondary heat exchanger 5.

Subsequently, the configuration of the connection member CM will be described in more detail.
As shown in FIG. 3 and FIG. 4, the connecting member CM connects the secondary heat exchanger 5, the exhaust part EA, and the neutralizing device 6 to each other.

  Referring to FIGS. 5 and 6, the first connecting portion 11, the second connecting portion 12 and the third connecting portion 13 extend in different directions from the tubular portion 10. That is, the first connection portion 11, the second connection portion 12, and the third connection portion 13 extend in three directions from the tubular portion 10.

  The connection member CM is made of a flexible material. In the present embodiment, the flexible material is rubber. The connecting member CM is integrally formed of rubber. This rubber is, for example, ethylene propylene diene rubber (EPDM).

  Referring to FIGS. 5 to 7, the tubular portion 10 has one end 10 a and the other end 10 b. The tubular portion 10 has a space 10s inside. The space 10s communicates from one end 10a to the other end 10b. The height position of the other end 10 b is higher than the height position of the one end 10 a. The tubular portion 10 is inclined so that the height position is lowered from the other end 10 b toward the one end 10 b.

  Still referring to FIG. 8, the tubular portion 10 has a recess CP on the outer circumferential surface between the one end 10 a and the other end 10 b so that the cross section of the tubular portion 10 has an arc shape. The recess CP is recessed from the outer peripheral surface of the tubular portion 10.

  The first connection portion 11 is disposed at one end 10 a of the tubular portion 10. The first connection 11 is connected to the neutralizer 6. The first connection portion 11 is formed in a tubular shape. The first connection portion 11 has a first opening 11 a and a first inner space 11 s. The first opening 11 a is disposed opposite to the one end 10 a of the tubular portion 10. The first internal space 11s communicates with the space 10s of the tubular portion 10 from the first opening 11a.

  The second connection portion 12 is disposed at the other end 10 b of the tubular portion 10. The second connection 12 is connected to the exhaust EA. The second connection portion 12 is formed in a tubular shape. The second connection portion 12 has a second opening 12 a and a second internal space 12 s. The second opening 12 a is disposed on the opposite side of the other end 10 b of the tubular portion 10. The second internal space 12s is in communication with the space 10s of the tubular portion 10 from the second opening 12a.

  The third connection portion 13 is disposed between the one end 10 a and the other end 10 b of the tubular portion 10. The third connection portion 13 extends from the recess CP. The third connection portion 13 is connected to the secondary heat exchanger 5. The third connection portion 13 is formed in a tubular shape. The third connection portion 13 has a third opening 13a and a third inner space 13s. The third opening 13 a is disposed on the opposite side of the recess CP of the tubular portion 10. The third inner space 13s communicates with the space 10s of the tubular portion 10 from the third opening 13a.

  The first connection portion 11 and the third connection portion 13 extend in directions opposite to each other. The first opening 11a and the third opening 13a are opened to face each other. The second connection portion 12 extends in a direction in which the first connection portion 11 and the third connection portion 13 cross each other. The second opening 12a is opened to intersect with each of the first opening 11a and the third opening 13a. The height position of the first opening 11a is lower than the height position of each of the second opening 12a and the third opening 13a.

  The thickness of the portion of the concave portion CP of the tubular portion 10 is thinner than the thickness of the portion of the tubular portion 10 other than the concave portion CP. The thickness of the portion of the recess CP of the tubular portion 10 is, for example, 1.5 mm, and the thickness of the portion of the tubular portion 10 other than the recess CP is, for example, 2.0 mm.

  The concave portion CP includes a bottom surface portion BP, a first side surface portion S1, and a second side surface portion S2. The first side surface portion S1 is configured to rise from one end E1 of the bottom surface portion BP. The bottom surface portion BP and the first side surface portion S1 are formed so as to form an obtuse angle with each other. The second side surface portion S2 is configured to stand up from the other end E2 of the bottom surface portion BP. The bottom surface portion BP and the second side surface portion S2 are formed so as to form an obtuse angle with each other. The first side surface portion S1 and the second side surface portion S2 are disposed to face each other.

  The bottom surface portion BP and the first side surface portion S1 are joined at one end E1 of the bottom surface portion BP. One end E1 of the bottom portion BP extends in a straight line. One end E1 of the bottom portion BP extends in a direction perpendicular to the direction in which the third connection portion 13 extends. One end E1 of the bottom surface portion BP is disposed between the first connection portion 11 and the third connection portion 13.

  The bottom surface portion BP and the second side surface portion S2 are joined at the other end E2 of the bottom surface portion BP. The other end E2 of the bottom portion BP extends in a straight line. The other end E2 of the bottom portion BP extends in a direction perpendicular to the direction in which the third connection portion 13 extends. The other end E2 of the bottom portion BP is disposed between the second connection portion 12 and the third connection portion 13. One end E1 and the other end E2 of the bottom portion BP are disposed in parallel with each other.

  Referring to FIGS. 9 and 10, connecting member CM further includes a seat portion 14. The seat 14 is disposed between the second connection 12 and the third connection 13. The seat portion 14 protrudes outward more than the second connection portion 12. The thickness of the seat portion 14 is thicker than the thickness of the portion other than the seat portion 14. The seat portion 14 is configured such that the second connection portion 12 can be pushed in a direction in which the first connection portion 11 and the third connection portion 13 cross each other.

Next, the operation and effect of the present embodiment will be described.
According to the connection member CM of the embodiment, the tubular portion 10 can be bent at the recess CP. For this reason, in a state in which any one of the first connection portion 11, the second connection portion 12, and the third connection portion 13 is connected, the other connection portion is bent at the concave portion CP to fold the tubular portion 10 It can be connected. Therefore, in a narrow space, the neutralization device 6 is connected to the first connection portion 11, the exhaust portion EA is connected to the second connection portion 12, and the secondary heat exchanger 5 is connected to the third connection portion 13. Work is easy.

  In the connection member CM of the present embodiment, the thickness of the portion of the recess CP of the tubular portion 10 is thinner than the thickness of the portion of the tubular portion 10 other than the recess CP. Therefore, since the thickness of the portion of the recess CP is thin, the tubular portion 10 can be easily bent by the recess CP.

  In the connection member CM of the present embodiment, the recess CP has a bottom surface portion BP, a first side surface portion S1, and a second side surface portion S2. The first side surface portion S1 and the second side surface portion S2 are disposed to face each other. Therefore, the distance between the first side surface portion S1 and the bottom surface portion BP and the distance between the second side surface portion S2 and the bottom surface portion BP can be secured. Therefore, when the tubular portion 10 is bent by the concave portion CP, the distance until the first side surface portion S1 and the bottom surface portion BP contact and the distance until the second side surface portion S2 and the bottom surface portion BP contact are large. can do. Thereby, the tubular portion 10 can be largely bent at the concave portion CP.

  In the connection member CM of the present embodiment, the flexible material is rubber. The connecting member CM is integrally formed of rubber. Therefore, the tubular portion 10 can be easily bent by the recess CP. In addition, it is possible to prevent the drain from leaking from the connection member CM.

  In the connection member CM of the present embodiment, the seat portion 14 is disposed between the second connection portion 12 and the third connection portion 13 and protrudes outward beyond the second connection portion 12, and The second connection portion 12 is configured to be able to be pushed in a direction in which the first connection portion 11 and the third connection portion 13 cross each other. For this reason, by pushing in the seat portion 14, the second connection portion 12 can be pushed in a direction in which the first connection portion 11 and the third connection portion 13 cross each other. Thereby, the work of connecting the second connection portion 12 to the exhaust portion EA is easy.

  The heat source machine according to the present embodiment includes the connection member CM, the neutralization device 6 connected to the first connection portion 11, the exhaust portion EA connected to the second connection portion 12, and the third heat source device. And a secondary heat exchanger 5 connected to the connection portion 13. For this reason, it is possible to provide a heat source machine provided with a connecting member CM that facilitates the operation of connecting the secondary heat exchanger 5, the exhaust unit EA, and the neutralization device 6 to each other in a narrow space in the heat source machine.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by the claims, and is intended to include all the modifications within the meaning and scope equivalent to the claims.

  DESCRIPTION OF SYMBOLS 1 case 2, 2 burners, 3 air blowers, 4 primary heat exchanger, 5 secondary heat exchanger, 6 neutralizer, 7 controller, 8 hot water supply path, 10 tubular part, 10a one end, 10b other end, 11 first 1 connection portion 11a first opening 11s first internal space 12 second connection 12a second opening 12s second internal space 13 third connection 13a 13s third internal space, 14 seat, BP bottom, CP recess, DO drain outlet, DP drain piping, E1 one end, E2 other end, EA exhaust, EP exhaust, IP intake, IW inlet, OW outlet, S1 first side, S2 second side.

Claims (6)

A heat exchanger that generates drain by recovering latent heat of combustion gas, an exhaust unit into which the drain flows from the heat exchanger together with the combustion gas, and the drain flows from the heat exchanger and the exhaust unit A connecting member for connecting the drain container to each other and made of a flexible material,
A tubular section,
A first connection disposed at one end of the tubular portion and connected to the drain container;
A second connection disposed at the other end of the tubular portion and connected to the exhaust portion;
The tubular portion has a recess on the outer peripheral surface such that the cross section of the tubular portion has an arc shape between the one end and the other end, and
A connection member comprising a third connection extending from the recess and connected to the heat exchanger.   The connection member according to claim 1, wherein a thickness of a portion of the recess of the tubular portion is thinner than a thickness of a portion other than the recess of the tubular portion. The recess is
Bottom part,
A first side surface portion rising from one end of the bottom surface portion;
And a second side surface portion rising from the other end of the bottom surface portion,
The connection member according to claim 1, wherein the first side surface portion and the second side surface portion are disposed to face each other. The flexible material is rubber,
The connection member according to any one of claims 1 to 3, which is integrally formed of the rubber. The first connection portion and the third connection portion extend in directions opposite to each other,
The second connection portion extends in a direction intersecting the direction in which the first connection portion and the third connection portion face each other,
It is arrange | positioned between the said 2nd connection part and the said 3rd connection part, overhangs outward rather than the said 2nd connection part, and the said 1st connection part and the 3rd connection part mutually oppose The connection member according to any one of claims 1 to 4, further comprising: a seat portion capable of pressing the second connection portion in a direction intersecting the direction in which the movement is performed. The connection member according to any one of claims 1 to 5.
The drain container connected to the first connection;
The exhaust connected to the second connection;
A heat source unit comprising: the heat exchanger connected to the third connection portion.

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