JP2017198437A - Heat exchanger and water heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger having an attachment member which can accurately attach a temperature sensor to a desired position of a connection pipe, and to provide a water heating system.SOLUTION: An attachment member 10 is attached to an outer surface of a connection pipe 42 which connects two heat transfer pipes 41 with each other at the outside of a case. The attachment member 10 is for attaching a temperature sensor 20 for detecting a temperature of a heated fluid circulating in the connection pipe 42. A temperature detection wall part 2 extends from one end part 1a of an extension wall part 1 of the attachment member 10 in a second direction D2. The temperature detection wall part 2 is a portion with which a temperature detection surface 11a of the temperature sensor 20 contacts. An insertion piece part 3 extends from the other end part 1b of the extension wall part 1 in the second direction D2. A heat exchanger is configured so that the temperature detection wall part 2 and the insertion piece part 3 can sandwich the outer surface of the connection pipe 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat exchanger and a hot water device, and more particularly to a heat exchanger and a hot water device having a mounting member for mounting a temperature sensor.

  As conventional heat exchangers, heat exchangers having a temperature sensor are described in, for example, Japanese Patent Application Laid-Open No. 2015-114004, Japanese Patent Application Laid-Open No. 10-197073, and Japanese Patent Application Laid-Open No. 2006-200209. The temperature sensors described in these documents are for detecting an excessive temperature rise of the heated fluid that circulates inside the heat exchanger. This temperature sensor is attached to the connecting pipe of the heat exchanger via an attachment member.

Japanese Patent Laid-Open No. 2015-114004 JP-A-10-197073 Japanese Patent Laid-Open No. 2006-200289

  The mounting member is required to correctly mount the temperature sensor at a desired position for accurate temperature detection.

  This invention is made in view of said subject, The objective is to provide the heat exchanger and hot water apparatus which have an attachment member which can attach a temperature sensor to the desired position of a connection pipe correctly. is there.

  The heat exchanger of the present invention includes a case, a plurality of heat transfer tubes, a connecting tube, and an attachment member. The plurality of heat transfer tubes are disposed inside the case and have at least a first heat transfer tube and a second heat transfer tube. The connecting pipe connects the first heat transfer pipe and the second heat transfer pipe to each other outside the case. The attachment member is attached to the outer surface of the connecting pipe, and is for attaching a temperature sensor for detecting the temperature of the heated fluid flowing through the connecting pipe. The attachment member includes an extending wall portion, a temperature detection wall portion, and an insertion piece portion. The extending wall portion extends in the first direction and has one end and the other end in the first direction. The temperature detection wall portion is a portion that extends in a second direction intersecting the first direction from one end portion of the extending wall portion and is in contact with the temperature detection surface of the temperature sensor. The insertion piece portion extends in the second direction from the other end portion of the extending wall portion. The temperature detection wall portion and the insertion piece portion are configured to sandwich the outer surface of the connecting pipe.

  According to the heat exchanger of this invention, a temperature sensor is attached to the temperature detection wall part which pinches | interposes the outer surface of a connecting pipe with an insertion piece part. For this reason, it becomes possible to attach a temperature sensor correctly to the desired position of a connecting pipe.

  In the above heat exchanger, a brazing material is interposed between the temperature detection wall portion and the connecting pipe. Thereby, the temperature detection wall portion and the brazing material are disposed between the temperature detection surface of the temperature sensor and the connecting pipe, and there is no or almost no gap. For this reason, the temperature of the to-be-heated fluid which distribute | circulates the inside of a heat exchanger with a temperature sensor can be measured correctly.

  In the above heat exchanger, the connecting pipe has a curved portion curved in an arc shape. The insertion piece is inserted on the inner peripheral side of the bending portion. By inserting the insertion piece portion into the inner peripheral side of the bending portion in this way, the insertion piece portion can be firmly positioned and fixed to the bending portion. Thereby, the temperature of the to-be-heated fluid which distribute | circulates the inside of a heat exchanger can be measured more correctly.

  In the above heat exchanger, the mounting member further includes a pair of bent portions connected to the insertion piece. Each of the pair of bent portions is in contact with the connecting pipe on the inner peripheral side of the curved portion. Thereby, an attachment member can be easily positioned with respect to a connection pipe.

  In the above heat exchanger, the mounting member further includes a support leg connected to the extending wall portion in order to maintain a gap between the extending wall portion and the connecting pipe. Thereby, it becomes easy to pour the brazing material into the gap between the extending wall portion and the connecting pipe, and it becomes easy to connect the attachment member to the connecting pipe.

  In the above heat exchanger, an opening that penetrates the extending wall is formed in the extending wall. Thereby, after positioning an attachment member to a connecting pipe, brazing material can be poured between an attachment member and a connecting pipe through an opening.

  In the above heat exchanger, the opening reaches one end of the extending wall portion. As a result, the brazing material poured from the opening can easily flow between the temperature detection wall of the mounting member and the connecting pipe. For this reason, it becomes easy to join between a temperature detection wall part and a connecting pipe with a brazing material.

  In the heat exchanger, the opening is connected to a pair of recesses provided in the temperature detection wall. The temperature detection wall has a protrusion sandwiched between a pair of recesses. By this protrusion, the brazing material poured from the opening can be prevented from leaking out from the opening and adhering to the temperature sensor mounting surface side of the temperature detection wall.

  In the above heat exchanger, the opening is configured such that the width increases from the other end to the one end. Thus, when the brazing material is poured into the opening sequentially from the other end side to the one end, the brazing material can be smoothly poured into the opening.

  In the above heat exchanger, the attachment member further includes a bent portion connected to the temperature detection wall portion. The bent portion includes a portion bent with respect to the temperature detection wall portion along the outer surface of the connecting pipe. Since the bent part is bent along the outer surface of the connecting pipe in this way, the brazing material can flow appropriately between the bent part and the outer surface of the connecting pipe, and the mounting member is connected more firmly. Can be attached to a tube.

  In the above heat exchanger, the temperature detection wall portion has an offset wall portion extending in a third direction intersecting the second direction from the connection portion with the extending wall portion. The offset wall is provided with a hole for attaching the temperature sensor to the temperature detection wall. This makes it easy to attach the temperature sensor to the temperature detection wall.

  In the heat exchanger described above, the temperature detection wall portion has a cut-and-raised pocket portion that constitutes an opening for inserting a part of the temperature sensor. Thus, by cutting and raising a part of the temperature sensor and inserting it into the opening of the pocket part, it is not necessary to fasten the part of the temperature sensor that has been inserted into the cut and raised pocket part to the temperature detection wall part with a screw or the like. Therefore, the temperature sensor can be easily attached and the number of parts can be reduced.

  In the above heat exchanger, the temperature detection wall portion has a concave portion adjacent to the opening on the surface where the temperature detection surface of the temperature sensor contacts. As a result, when the mounting member is joined to the connecting pipe with the brazing material, even if the brazing material flows out to the temperature detection surface side of the mounting member through the opening, the brazing material is moved to the temperature detection wall portion and the temperature detection surface of the temperature sensor by the concave portion. It is suppressed that it stays between.

  In the heat exchanger described above, the concave portion reaches the lower end of the temperature detection wall portion. Thereby, the brazing material that has flowed to the temperature detection surface side of the mounting member through the opening can be smoothly guided to the lower end of the temperature detection wall by the concave portion. For this reason, it is further suppressed that the brazing material stays between the temperature detection wall portion and the temperature detection surface of the temperature sensor.

  In the above heat exchanger, the temperature detection wall portion has a groove-like portion extending from the opening to the lower end of the temperature detection wall portion. As a result, when the mounting member is joined to the connecting pipe with the brazing material, even if the brazing material flows out to the temperature detection surface side of the mounting member through the opening, the brazing material is smoothly guided to the lower end of the temperature detection wall portion by the groove portion. be able to. For this reason, it is suppressed that brazing material stagnates between a temperature detection wall part and the temperature detection surface of a temperature sensor.

  In the above heat exchanger, the groove-like portion is configured so that the width becomes wider from the opening toward the lower end of the temperature detection wall portion. This makes it difficult for the brazing material to leak from the groove-like portion, and allows the brazing material to be smoothly guided downward from the opening toward the lower end.

  The hot water device of the present invention includes the above heat exchanger and a combustion device for generating a heating gas to be given to the heat exchanger.

  According to the hot water device of the present invention, the temperature sensor can be accurately attached to a desired position of the connecting pipe.

  In the above hot water device, the first heat transfer tube and the second heat transfer tube connected to each other by the connecting tube to which the mounting member is attached are arranged directly above the combustion region in which combustion is always performed in the combustion state of the combustion device. Yes. This makes it possible to detect the temperature of the connecting pipe under any combustion condition.

  As described above, according to the present invention, it is possible to realize a heat exchanger and a hot water apparatus having an attachment member that can accurately attach a temperature sensor to a desired position of a connecting pipe.

It is a perspective view which shows roughly the structure of the heat exchanger in one embodiment of this invention. It is a disassembled perspective view which decomposes | disassembles and shows the connecting pipe of the heat exchanger in FIG. 1, an attachment member, and a temperature sensor. It is a disassembled perspective view which decomposes | disassembles and shows the connecting pipe of the heat exchanger in FIG. 1, an attachment member, and a temperature sensor. It is the top view (A), front view (B), and right view (C) which show the structure of the attachment member in the heat exchanger shown in FIG. It is a top view which shows the state in which the attachment member was attached to the connection pipe in the heat exchanger shown in FIG. It is a side view which shows the state in which the attachment member was attached to the connection pipe in the heat exchanger shown in FIG. It is a schematic sectional drawing which follows the VII-VII line of FIG. It is a schematic sectional drawing which follows the VIII-VIII line of FIG. It is a perspective view which shows roughly the structure of the 1st modification of an attachment member. It is a perspective view which shows roughly the structure of the 2nd modification of an attachment member. It is a schematic sectional drawing which follows the XI-XI line of FIG. It is a front view which shows roughly the structure of the attachment member shown in FIG. It is a side view of the attachment member for demonstrating the effect that the attachment member shown in FIG. 10 has the bending part 2h for reinforcement. It is a front view which shows the structure which the recessed part 2g reached to the lower end of the temperature detection wall part 2 of an attachment member. It is a perspective view which shows roughly the structure of the 3rd modification of an attachment member. FIG. 16 is a schematic partial sectional view taken along line XVI-XVI in FIG. 15. It is a front view which shows the structure where a width | variety becomes wide, so that the groove | channel upper part provided in the attachment member goes to a lower end. It is a figure which shows schematically the structure of the hot water supply apparatus as an example of the hot water apparatus using the heat exchanger shown in FIG. It is a figure for demonstrating the relationship between the heat exchanger tube of a heat exchanger, and the combustion area | region of a combustion apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the heat exchanger 40 of the present embodiment includes an attachment member 10, a temperature sensor 20, a fixing member 30, a plurality of heat transfer tubes 41, a plurality of connection tubes 42, and a plurality of connection tubes 10. It has a connection pipe 43, a plurality of fins 44, and a case 45.

  Case 45 is comprised from the wall part which has a rectangular frame shape, for example. The case 45 has openings on the upstream side and the downstream side of the heating gas. The case 45 is configured so that the heating gas can be introduced from the outside through the upstream opening and discharged from the inside through the downstream opening.

  Each of the plurality of fins 44 is made of a plate-like member, and is laminated on the inside of the case 45.

  Each of the plurality of heat transfer tubes 41 passes through the inside of the case 45, and thereby passes through each of the plurality of fins 44. Each of the plurality of heat transfer tubes 41 is connected to a fin 44 through which the heat transfer tube 41 passes. Each of the plurality of heat transfer tubes 41 also penetrates each of a pair of wall portions of the case 45 facing each other.

  Each of the plurality of heat transfer tubes 41 is arranged, for example, in a single stage in the case 45. However, the plurality of heat transfer tubes 41 may be arranged in the case 45 so as to have two or more stages.

  The connecting pipe 42 connects two heat transfer pipes (the first heat transfer pipe 41 and the second heat transfer pipe 41) among the plurality of heat transfer pipes 41 outside the case 45. Each of the plurality of connecting pipes 42 has a curved portion that is curved in an arc shape. Each of the plurality of connecting pipes 42 has, for example, a U shape.

  By connecting the plurality of heat transfer tubes 41 by the plurality of connection tubes 42 as described above, the plurality of heat transfer tubes 41 and the plurality of connection tubes 42 form a flow path for passing the fluid to be heated. In the present embodiment, a first flow path on the right side in FIG. 1 and a second flow path on the left side are configured. The first channel and the second channel are separated from each other. The first flow path constitutes the first heat exchange part 40A, and the second flow path constitutes the second heat exchange part 40B.

  The plurality of fins 44 connected to the heat transfer tubes 41 constituting the first heat exchange unit 40A and the plurality of fins 44 connected to the heat transfer tubes 41 constituting the second heat exchange unit 40B are separated from each other. .

  A connection pipe 43 is connected to each of the heat transfer tubes 41 located at both ends of the first flow path in the first heat exchange unit 40A. Further, the connection pipe 43 is also connected to each of the heat transfer tubes 41 located at both ends of the second flow path in the second heat exchange unit 40B.

  Next, the structure of the attachment member 10, the temperature sensor 20, and the fixing member 30 will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the temperature sensor 20 is attached to the connecting pipe 42 with the attachment member 10 interposed therebetween. The attachment member 10 is attached to the outer surface of the curved portion of the connecting pipe 42. The temperature sensor 20 is for detecting the temperature of the heated fluid flowing through the connecting pipe 42. More specifically, the temperature sensor 20 is for detecting an abnormally high temperature of the heated fluid that circulates in the connecting pipe 42.

  The attachment member 10 is configured by bending a single plate material. The mounting member 10 includes an extending wall portion 1, a temperature detection wall portion 2, an insertion piece portion 3, a pair of support leg portions 4, a pair of bent portions 5, and a bent portion 6. Yes.

  The temperature sensor 20 includes a temperature sensor main body 11 and a mounting portion 12. The attachment portion 12 extends from the end of the temperature sensor body 11 to both sides. A through hole 12 a is provided on each of both sides of the attachment portion 12. The through hole 12a is configured to allow a part of the fixing member 30 to pass therethrough.

  The fixing member 30 is a fastening member such as a bolt. The fixing member 30 has a shaft portion 31 and a head portion 32. The head portion 32 has a thread groove and constitutes a male screw. However, the fixing member 30 may be a pin or the like.

  The shaft portion 31 of the fixing member 30 is threaded into the hole 2 b of the mounting member 10 after passing through the through hole 12 a of the temperature sensor 20. Thus, the temperature sensor 20 is fixedly attached to the temperature detection wall portion 2 of the mounting member 10 by the fixing member 30. In this state, the temperature detection surface 11 a (FIG. 3) of the temperature sensor 20 is in contact with the temperature detection wall 2.

  As shown in FIGS. 4A to 4C, the extending wall portion 1 of the mounting member 10 extends in the first direction D1, and one end portion in the first direction D1. 1a and the other end 1b.

  The temperature detection wall 2 extends from one end 1a of the extending wall 1 in a second direction D2 that intersects the first direction D1. The temperature detection wall 2 is bent at a substantially right angle with respect to the extending wall 1. The temperature detection wall part 2 is a part which the temperature detection surface 11a (FIG. 3) of the temperature sensor 20 contacts as above-mentioned.

  The insertion piece 3 extends in the second direction D2 from the other end 1b of the extending wall 1. That is, the insertion piece 3 extends from the extending wall 1 in the same direction D2 as the temperature detection wall 2. The insertion piece 3 is bent at a substantially right angle with respect to the extending wall 1. The temperature detection wall part 2 and the insertion piece part 3 are comprised so that the outer surface of the connection pipe 42 can be pinched | interposed.

  The extending wall portion 1 is formed with an opening 1 c that penetrates the extending wall portion 1. The opening 1 c reaches one end 1 a of the extending wall 1. The opening 1c is configured such that the width W increases from the other end 1b side toward the one end 1a.

  The opening 1 c is connected to a pair of recesses 2 d provided in the temperature detection wall 2. The temperature detection wall 2 has a protrusion 2c sandwiched between a pair of recesses 2d. The protrusion 2c protrudes upward by a height H (FIG. 4C) from the upper surface of the extending wall 1. Moreover, the protrusion part 2c may incline with respect to the temperature detection wall part 2, and may protrude upwards, as FIG. 9 shows. In this case, it is preferable that the protrusion 2c is inclined with respect to the temperature detection wall 2 in a direction away from the insertion piece 3 as it goes upward.

  The temperature detection wall 2 has an offset wall 2a. The offset wall portion 2a extends from the connecting portion with the extending wall portion 1 in a third direction D3 that intersects the first direction D1 and the second direction D2. That is, the offset wall portion 2 a is a portion that is not directly connected to the extended wall portion 1.

  The offset wall 2a is provided with the hole 2b for attaching the temperature sensor 20 to the temperature detection wall 2 as described above. The hole 2b is, for example, a female screw portion. The temperature detection wall 2 has a cut and raised pocket 2e.

  The cut-and-raised pocket portion 2 e is a portion that constitutes an opening 2 f for inserting a part of the temperature sensor 20. The cut and raised pocket portion 2e has a shape cut and raised from a portion of the temperature detection wall portion 2 other than the cut and raised pocket portion 2e. Thus, an opening 2f is formed between the portion of the temperature detection wall 2 other than the cut and raised pocket 2e and the cut and raised pocket 2e. A part of the temperature sensor 20 can be inserted into the opening 2f.

  Each of the pair of support legs 4 is connected to each of both side ends of the extending wall 1. Each of the pair of support legs 4 is bent at a predetermined angle with respect to the extending wall 1. The pair of support legs 4 is a portion for holding a gap S (FIG. 6) between the extending wall portion 1 and the connection pipe 42 in a state where the attachment member 10 is attached to the connection pipe 42.

  Each of the pair of bent portions 5 is connected to both side portions of the insertion piece portion 3. Each of the pair of bent portions 5 is bent to the opposite side to the temperature detection wall portion 2 so as to have a predetermined angle with respect to the insertion piece portion 3. Each of the pair of bent portions 5 is a portion that abuts the connecting tube 42 on the inner peripheral side of the curved portion of the connecting tube 42.

  The bent portion 6 is connected to the end of the temperature detection wall 2 opposite to the end on the extending wall 1 side. The bent portion 6 is bent so as to go from the temperature detection wall portion 2 toward the insertion piece portion 3 side. The bent portion 6 has a substantially V shape in a side view shown in FIG. The bent portion 6 is configured to include a portion bent with respect to the temperature detection wall portion 2 along the outer surface of the connecting pipe 42.

  Next, a state where the attachment member 10 is attached to the connecting pipe 42 will be described with reference to FIGS.

  As shown in FIGS. 5 and 6, in a state where the attachment member 10 is attached to the connection pipe 42, the insertion piece 3 of the attachment member 10 is inserted on the inner peripheral side of the curved portion of the connection pipe 42. Further, in the mounting state, the temperature detection wall portion 2 of the mounting member 10 is located on the outer peripheral side of the curved portion of the connecting pipe 42. The temperature detection wall 2 and the insertion piece 3 sandwich the curved portion of the connecting pipe 42 from the outer peripheral side and the inner peripheral side.

  As shown in FIG. 7, in the attached state, the pair of support legs 4 are in contact with the connecting pipe 42. As a result, the pair of support legs 4 forms a gap S (FIG. 6) between the extending wall 1 and the connecting pipe 42 in the attached state.

  As shown in FIG. 8, in the attached state, each of the pair of bent portions 5 is in contact with the connecting tube 42 on the inner peripheral side of the bending portion of the connecting tube 42. As a result, positioning when attaching the attachment member 10 to the connecting pipe 42 is facilitated, and the attaching member 10 can be firmly fixed to the connecting pipe 42.

  As shown in FIG. 6, in the attached state, between the extending wall portion 1 and the connecting tube 42, between the temperature detection wall portion 2 and the connecting tube 42, and between the bent portion 6 and the connecting tube 42. Are joined by a brazing material 110.

  The brazing material 110 is applied using, for example, a dispenser, and is poured between the attachment member 10 and the connecting pipe 42 from the opening 1 c of the extending wall 1. The dispenser applies the brazing material while moving in the direction (arrow DR in the drawing) from the other end 1b side of the extending wall 1 to the one end 1a side. As shown in FIG. 9, when the projecting portion 2c is inclined, the operator can easily see the other end portion 1b side when applying the brazing material with a dispenser from the front, so that workability is improved.

  The brazing material poured from the opening 1c wets and spreads in the gap S between the extending wall 1 and the connecting pipe 42 to connect the extending wall 1 and the connecting pipe 42. Further, the brazing material flows downward from the opening 1c, wets and spreads in the gap between the temperature detection wall 2 and the connection pipe 42, and connects the temperature detection wall 2 and the connection pipe 42. Further, the brazing material flows further downward from between the temperature detection wall portion 2 and the connecting pipe 42, wets and spreads in the gap between the bent portion 6 and the connecting pipe 42, and connects the bent portion 6 and the connecting pipe 42. Connecting.

Next, another modified example of the attachment member will be described with reference to FIGS.
As shown in FIGS. 10 to 12, the configuration of the modified example of the mounting member 10 includes a concave portion 2 g as compared with the configuration of the mounting member 10 shown in FIG. 9, and a bending for reinforcement. The difference is that the portion 2h is added and the support leg portion 4 is omitted.

  As shown in FIG. 10, in the present modification, the temperature detection wall portion 2 has a concave portion 2g. The concave portion 2g is formed on the surface SA of the temperature detection wall portion 2 with which the temperature detection surface 11a (FIG. 12) of the temperature sensor 20 comes into contact. The concave portion 2g is adjacent to the opening 2f. The opening 2f is configured by the raised pocket portion 2e as described above. The concave portion 2g is cut and raised along the third direction D3 and is adjacent to the pocket portion 2e.

  As shown in FIG. 11, the concave portion 2g is recessed toward the back surface SB side of the surface SA with respect to the surface SA of the temperature detection wall portion 2 with which the temperature detection surface 11a of the temperature sensor 20 comes into contact. For this reason, a step ST1 exists between the surface SC of the concave portion 2g on the side where the temperature sensor 20 is attached and the surface SA of the temperature detection wall portion 2.

  As shown in FIG. 12, in a state where the temperature sensor 20 is attached to the attachment member 10, the concave portion 2 g is the temperature of the temperature sensor 20 when viewed from the direction perpendicular to the surface SA of the temperature detection wall portion 2. The temperature detection surface 11a is disposed so as not to overlap with the detection surface 11a. As a result, the surface SA of the temperature detection wall portion 2 with which the temperature detection surface 11a of the temperature sensor 20 comes into contact is flat.

  As shown in FIGS. 10 and 11, in the present modification, a reinforcing bent portion 2h is connected to the end portion of the offset wall portion 2a in the third direction D3. The reinforcing bent portion 2h is bent toward the mounting side of the temperature sensor 20 with respect to the offset wall portion 2a. The reinforcing bent portion 2h is bent, for example, at a right angle with respect to the offset wall portion 2a.

  As shown in FIG. 13, when the above-described reinforcing bent portion 2 h is not provided, when the temperature sensor 20 is attached to the attachment member 10 by the fixing member 30, the fixing member 30 is screwed to indicate the broken line. There is a possibility that the temperature detection wall 2 is deformed in the thickness direction. When the temperature detection wall 2 is deformed in this manner, it becomes difficult to make the temperature detection surface 11 a of the temperature sensor 20 in close contact with the temperature detection wall 2. For this reason, accurate temperature measurement by the temperature sensor 20 becomes difficult.

  On the other hand, in the present modification, a reinforcing bent portion 2 h is provided on the temperature detection wall portion 2. The strength in the thickness direction of the temperature detection wall 2 is improved by the reinforcing bent portion 2h. For this reason, when attaching the temperature sensor 20 to the attachment member 10 by the fixing member 30, it is suppressed that the temperature detection wall part 2 deform | transforms in the thickness direction.

  As shown in FIG. 12, in the state where the temperature sensor 20 is attached to the attachment member 10, the end portion of the attachment portion 12 in the temperature sensor 20 in the third direction D3 is in contact with the reinforcing bent portion 2h. As described above, when the end portion of the attachment portion 12 is in contact with the reinforcing bent portion 2h, the temperature sensor 20 can be easily positioned with respect to the attachment member 10 when the temperature sensor 20 is attached to the attachment member 10.

  10 to 12 are substantially the same as the configuration of the mounting member 10 shown in FIG. 9, the same elements are denoted by the same reference numerals, and the description thereof is omitted. Do not repeat.

  10 to 12, the concave portion 2g does not reach the lower end of the temperature detection wall portion 2. However, as shown in FIG. 14, the concave portion 2 g may reach the lower end of the temperature detection wall portion 2.

Next, still another modified example of the mounting member will be described with reference to FIGS.
As shown in FIG. 15, the configuration of the modified example of the mounting member 10 is different from the configuration of the mounting member 10 shown in FIGS. 10 to 12 in that a groove portion 2 i is added. Yes. In this modification, the temperature detection wall portion 2 has a groove-shaped portion 2i. The groove-like portion 2 i extends from the opening 2 f to the lower end of the temperature detection wall portion 2.

  As shown in FIG. 16, the groove-like portion 2 i is on the back surface SB side of the surface SA with respect to the surface SA of the temperature detection wall portion 2 with which the temperature detection surface 11 a (FIG. 12) of the temperature sensor 20 contacts. It is depressed. For this reason, a step ST2 exists between the surface SD of the groove-like portion 2i on the side where the temperature sensor 20 is attached and the surface SA of the temperature detection wall portion 2.

  In the modification shown in FIG. 15, the groove-like portion 2 i maintains the same width from the connection portion with the opening 2 f to the lower end of the temperature detection wall portion 2. However, as shown in FIG. 17, the groove-like portion 2 i may be configured such that the width WA increases from the opening 2 f toward the lower end of the temperature detection wall portion 2.

  15 and 17 is substantially the same as the configuration of the mounting member 10 shown in FIGS. 10 to 12, and therefore the same elements are denoted by the same reference numerals. I will not repeat that explanation.

  Next, FIG. 18 and FIG. 19 are used about the structure of the bath water heater 100 as an example of the hot water apparatus which has the heat exchanger 40 of this Embodiment shown in FIGS. 1-8 as primary heat exchanger 40A, 40B. explain.

  As shown in FIG. 18, the bath water heater 100 mainly has a hot water supply path, a bath circulation path, a hot water supply path, and a drain discharge path.

  The hot water supply path of the bath water heater 100 is a path for heating clean water. This hot water supply path is composed of a primary heat exchanger 40A, a secondary heat exchanger 50A, a combustion device 60A, pipes 71 to 73, a distribution valve 74, and the like.

  One end of the pipe 71 has a water inlet. The water inlet is connected to the water supply. The other end of the pipe 71 is connected to one end of the secondary heat exchanger 50A. The other end of the secondary heat exchanger 50A is connected to one end of the primary heat exchanger 40A. The other end of the primary heat exchanger 40 </ b> A is connected to one end of the pipe 72. The other end of the pipe 72 is connected to a currant or the like outside the bath water heater 100. The distribution valve 74 is connected to the pipe 71. The distribution valve 74 and the pipe 72 are connected by a pipe 73.

  A combustion device 60A is disposed in the vicinity of the heat exchanger 40A. The combustion device 60 </ b> A has a plurality of combustion pipes 61.

  The bath circulation path of the bath water heater 100 is a path for heating the hot water in the bathtub 90. This bath circulation path includes a primary heat exchanger 40B, a secondary heat exchanger 50B, a combustion device 60B, pipes 82 and 83, a circulation pump 84, and the like.

  One end of the pipe 82 is connected to one end of the secondary heat exchanger 50B. The other end of the secondary heat exchanger 50B is connected to one end of the primary heat exchanger 40B. The other end of the primary heat exchanger 40 </ b> B is connected to one end of the pipe 83. Each of the other end of the pipe 82 and the other end of the pipe 83 is connected to a circulation adapter 91 disposed in the bathtub 90. The piping 82 is provided with a circulation pump 84.

  A combustion device 60B is disposed in the vicinity of the heat exchanger 40B. The combustion device 60 </ b> B has a plurality of combustion tubes 61.

  The hot water supply path of the bath water heater 100 is a path through which hot water flows from the hot water supply path into the bath circulation path. This pouring route is constituted by a pouring solenoid valve 76, check valves 77 and 78, an air release valve 79, pipes 75, 80, 81, and the like.

  A pipe 81 branched from the pipe 72 of the hot water supply path is connected to a circulation pump 84 of the bath circulation path. In the pipe 81, a pouring electromagnetic valve 76, a check valve 77, and a check valve 78 are arranged in this order. An air release valve 79 is connected to the path of the pipe 81 between the check valve 77 and the check valve 78.

  The air release valve 79 can be opened and closed in response to the fluid pressure in the pipe 71 given through the pipe 75. When the air release valve 79 is opened, the air release valve 79 can discharge fluid from the path of the pipe 81 between the check valve 77 and the check valve 78 to the outside of the bath water heater 100 through the pipe 80. is there.

  The drain discharge path of the bath water heater 100 is a path for discharging the drain generated in the secondary heat exchangers 50 </ b> A and 50 </ b> B to the outside of the bath water heater 100. The drain discharge path includes a drain tank 86, pipes 85 and 87, and the like. Drain generated in the secondary heat exchangers 50 </ b> A and 50 </ b> B can be stored in the drain tank 86 through the pipe 85. The drain in the drain tank 86 can be discharged out of the bath water heater 100 through the pipe 87.

  The combustion device 60A has a plurality of combustion regions BR1, BR2, and BR3. These combustion regions BR1, BR2, and BR3 can perform combustion operations at different timings or at the same time.

  Specifically, the combustion region BR2 can perform a combustion operation at a timing different from that of the combustion region BR1. The combustion region BR3 can perform a combustion operation at a timing different from each of the combustion regions BR1 and BR2.

  The combustion device 60B is composed of, for example, a single combustion region BR4. However, the combustion device 60B may be composed of a plurality of combustion regions, like the combustion device 60A.

  A gas pipe 65 is connected to each of the combustion devices 60A and 60B. The gas pipe 65 is for supplying fuel gas to each of the combustion devices 60A and 60B. An original gas electromagnetic valve 64 and a gas proportional valve 63 are connected to the gas pipe 65.

  Further, the gas pipe 65 is branched into, for example, four paths. Each of the four-path branched gas pipes 65 is connected to each of the combustion regions BR1, BR2, BR3, BR4. Each of the branched gas pipes 65 is connected to each of the electromagnetic valves 62a to 62d. The supply of fuel gas to each of the branched gas pipes 65 can be controlled by the opening / closing operations of the electromagnetic valves 62a to 62d. Thus, by independently controlling the open / close states of the electromagnetic valves 62a to 62d, it is possible to independently adjust the combustion states of the combustion regions BR1 to BR4.

  As shown in FIG. 19, for example, the combustion region BR1 is set as a combustion region that always burns in the combustion state of the combustion device 60A. In this case, it is preferable that the first heat transfer tube 41 and the second heat transfer tube 41 connected to each other by the connecting tube 42 to which the mounting member 10 is mounted are arranged directly above the combustion region BR1.

Next, the effect of this Embodiment is demonstrated.
According to the present embodiment, as shown in FIGS. 5 and 6, the temperature sensor 20 is attached to the temperature detection wall 2 that sandwiches the outer surface of the connecting pipe 42 together with the insertion piece 3. For this reason, it becomes possible to attach the temperature sensor 20 to the desired position of the connecting pipe 42 accurately.

  Further, as shown in FIG. 6, the temperature detection wall portion and the connecting pipe are joined by a brazing material 110. Thereby, the temperature detection wall 2 and the brazing filler metal 110 are disposed between the temperature detection surface 11a (FIG. 3) of the temperature sensor 20 and the connecting pipe 42, and there is no gap. For this reason, the temperature sensor 20 can accurately detect the temperature of the heated fluid that circulates inside the heat exchanger 40.

  As shown in FIG. 5, the insertion piece 3 is inserted on the inner peripheral side of the bending portion of the connecting pipe 42. Thus, by inserting the insertion piece part 3 into the inner peripheral side of the bending part, the insertion piece part 3 can be firmly positioned and fixed to the bending part. Thereby, it becomes possible to detect the temperature of the heated fluid flowing through the heat exchanger 40 more accurately.

  Further, as shown in FIGS. 5 and 8, each of the pair of bent portions 5 is in contact with the connecting tube 42 on the inner peripheral side of the curved portion of the connecting tube 42. Thereby, the attachment member 10 can be easily positioned with respect to the connecting pipe 42.

  Further, as shown in FIGS. 6 and 7, a gap S is held between the extended wall portion 1 and the connecting pipe 42 by the pair of support legs 4. As a result, as shown in FIG. 6, it becomes easy to pour the brazing filler metal 110 into the gap S between the extending wall portion 1 and the connecting pipe 42, and it is easy to connect the attachment member 10 to the connecting pipe 42. Become.

  As shown in FIGS. 5 and 6, the extending wall 1 is formed with an opening 1 c that penetrates the extending wall 1. Thereby, after positioning the attachment member 10 to the connection pipe 42, the brazing material 110 can be poured between the attachment member 10 and the connection pipe 42 through the opening 1 c. For this reason, joining of the attachment member 10 and the connecting pipe 42 becomes easy.

  As shown in FIG. 5, the opening 1 c reaches one end 1 a of the extending wall 1. As a result, the brazing material 110 poured from the opening 1 c can easily flow between the temperature detection wall 2 of the mounting member 10 and the connecting pipe 42. For this reason, it becomes easy to join between the temperature detection wall part 2 and the connecting pipe 42 with the brazing material 110.

  The opening 1 c is connected to a pair of recesses 2 d provided in the temperature detection wall 2. The temperature detection wall 2 has a protrusion 2c sandwiched between a pair of recesses 2d. The protrusion 2c can prevent the brazing material 110 poured from the opening 1c from leaking out of the opening 1c and adhering to the mounting surface side of the temperature sensor 20 in the temperature detection wall 2.

  Moreover, the opening part 1c is comprised so that the width W may become large as it goes to the one end part 1a from the other end part 1b side. Thereby, when pouring the brazing material 110 into the opening 1c in order from the other end 1b toward the one end 1a, the brazing material 110 can be smoothly poured into the opening 1c.

  As shown in FIG. 6, the bent portion 6 includes a portion bent with respect to the temperature detection wall portion along the outer surface of the connecting pipe 42. Since the bent portion 6 is bent along the outer surface of the connecting pipe 42 as described above, the brazing material can appropriately flow between the bent portion and the outer surface of the connecting pipe, and the mounting member can be more firmly attached. 10 can be attached to the connecting pipe 42.

  As shown in FIGS. 2 and 4B, the temperature detection wall portion 2 has an offset wall portion 2a extending in the third direction D3 from the connection portion with the extending wall portion 1. The offset wall 2 a is provided with a hole 2 b for attaching the temperature sensor 20 to the temperature detection wall 2. This makes it easy to attach the temperature sensor 20 to the temperature detection wall 2.

  That is, at the position of the offset wall 2a, the curved portion of the connecting pipe 42 is curved in a direction away from the offset wall 2a. As a result, the distance between the offset wall portion 2a and the connecting pipe 42 is increased. For this reason, it becomes difficult for the fixing member 30 to interfere with the connecting pipe 42, and it becomes easy to attach the temperature sensor 20 to the temperature detection wall 2.

  Moreover, the temperature detection wall part 2 has the cut-and-raised pocket part 2e for inserting a part of the temperature sensor 20 therein. Thus, by cutting and raising a part of the temperature sensor 20 and inserting it into the pocket portion 2e, it is not necessary to fasten the portion of the temperature sensor 20 inserted into the cut and raised pocket portion 2e with a screw or the like. For this reason, the attaching operation of the temperature sensor 20 becomes easy and the number of parts can be reduced.

  Further, for example, in FIG. 6, when the amount of the brazing material 110 applied is not appropriate, when the brazing material 110 is applied, the brazing material 110 passes through the opening 2f shown in FIG. May flow out. If the brazing filler metal 110 stays between the temperature detection wall 2 and the temperature detection surface 11a (FIG. 3) of the temperature sensor 20, there is a possibility that accurate temperature measurement by the temperature sensor 20 cannot be performed.

  Therefore, in the mounting member 10 shown in FIGS. 10 to 12, the temperature detection wall portion 2 has a concave portion 2 g adjacent to the opening 2 f on the surface where the temperature detection surface 11 a (FIG. 12) of the temperature sensor 20 contacts. doing. As a result, when the mounting member 10 is joined to the connecting pipe 42 (FIG. 2) with the brazing material 110 (FIG. 6), the brazing material 110 may flow out to the temperature detection surface 11a side of the mounting member 10 through the opening 2f. The material 110 collects in the concave portion 2g. For this reason, it is suppressed that the brazing material 110 stays between the temperature detection wall part 2 and the temperature detection surface 11a of the temperature sensor 20. Thereby, it becomes possible to relax the management conditions of the coating amount of the brazing material 110.

  Further, as shown in FIG. 14, the concave portion 2 g reaches the lower end of the temperature detection wall portion 2. Thereby, the brazing material 110 that has flowed to the attachment side of the temperature sensor 20 of the attachment member 10 through the opening 2f can be smoothly guided to the lower end of the temperature detection wall portion 2 by the concave portion 2g. Thereby, it is further suppressed that the brazing material 110 stays between the temperature detection wall portion 2 and the temperature detection surface 11 a of the temperature sensor 20.

  As shown in FIG. 15, the temperature detection wall portion 2 has a groove-like portion 2 i extending from the opening 2 f to the lower end of the temperature detection wall portion 2. Thereby, when the attachment member 10 is joined to the connecting pipe 42 (FIG. 2) by the brazing material 110 (FIG. 6), even if the brazing material 110 flows to the attachment side of the temperature sensor 20 of the attachment member 10 through the opening 2f, The brazing material 110 is guided to the lower end of the temperature detection wall 2 by the groove-shaped portion 2i. For this reason, it is suppressed that the brazing material 110 stays between the temperature detection wall part 2 and the temperature detection surface 11a of the temperature sensor 20.

  As shown in FIG. 16, the groove-like portion 2 i is configured such that the width WA increases from the opening 2 f toward the lower end of the temperature detection wall portion 2. This makes it difficult for the brazing material 110 (FIG. 6) to leak out of the groove-like portion 2i, and allows the brazing material 110 to be smoothly guided downward as it goes from the opening 2f to the lower end.

  Further, as shown in FIG. 19, the first heat transfer pipe 41 and the second heat transfer pipe 41 connected to each other by the connecting pipe 42 to which the mounting member 10 is attached are combustion that always burns in the combustion state of the combustion device 60A Arranged immediately above region BR1. Thereby, it becomes possible to detect the temperature of the connecting pipe 42 under any combustion conditions.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Extension wall part, 1a One end part, 1b The other end part, 1c Opening part, 2 Temperature detection wall part, 2a Offset wall part, 2b Hole, 2c Projection part, 2d recessed part, 2e pocket part, 2f opening part, 2g Concave shape Part, 2h bending part for reinforcement, 2i groove part, 3 insertion piece part, 4 support leg part, 5 bending part, 6 bending part, 10 attachment member, 11 temperature sensor main body, 11a temperature detection surface, 12 attachment part, 12a Through hole, 20 Temperature sensor, 30 Fixing member, 31 Shaft, 32 Head, 40A, 40B Primary heat exchanger, 50A, 50B Secondary heat exchanger, 41 Heat transfer tube, 42 Connection tube, 43 Connection piping, 44 Fin, 45 case, 60A, 60B combustion device, 61 combustion pipe, 62a to 62d solenoid valve, 63 gas proportional valve, 64 source gas solenoid valve, 65 gas pipe, 71 to 73, 75, 80 to 3, 85, 87 Piping, 74 Distribution valve, 76 Hot water solenoid valve, 77, 78 Check valve, 79 Atmospheric release valve, 84 Circulation pump, 86 Drain tank, 90 Bathtub, 91 Circulation adapter, 100 Bath water heater, 110 Brazing material, BR1, BR2, BR3, BR4 Combustion region.

Claims (18)

Case and
A plurality of heat transfer tubes disposed inside the case and having at least a first heat transfer tube and a second heat transfer tube;
A connecting pipe for connecting the first heat transfer pipe and the second heat transfer pipe to each other outside the case;
An attachment member for attaching a temperature sensor attached to the outer surface of the connection pipe and detecting the temperature of the heated fluid flowing through the connection pipe;
The mounting member is
An extending wall portion extending in a first direction and having one end and the other end in the first direction;
A temperature detection wall portion extending from the one end portion of the extending wall portion in a second direction intersecting the first direction and contacting a temperature detection surface of the temperature sensor;
An insertion piece portion extending in the second direction from the other end portion of the extending wall portion,
A heat exchanger configured such that the temperature detection wall portion and the insertion piece portion can sandwich an outer surface of the connecting pipe.   The heat exchanger according to claim 1, wherein a brazing material is interposed between the temperature detection wall portion and the connection pipe. The connecting pipe has a curved portion curved in an arc shape,
The heat exchanger according to claim 1 or 2, wherein the insertion piece portion is inserted on an inner peripheral side of the bending portion. The attachment member further includes a pair of bent portions connected to the insertion piece portion,
4. The heat exchanger according to claim 3, wherein each of the pair of bent portions is in contact with the connecting pipe on an inner peripheral side of the curved portion.   The said attachment member further contains the support leg part connected to the said extended wall part in order to hold | maintain a clearance gap between the said extended wall part and the said connecting pipe. The heat exchanger as described in.   The heat exchanger according to any one of claims 1 to 5, wherein an opening that penetrates the extending wall portion is formed in the extending wall portion.   The heat exchanger according to claim 6, wherein the opening reaches the one end of the extending wall. The opening is connected to a pair of recesses provided in the temperature detection wall,
The heat exchanger according to claim 7, wherein the temperature detection wall portion has a protrusion sandwiched between the pair of recesses.   The heat exchanger according to any one of claims 6 to 8, wherein the opening is configured to increase in width from the other end toward the one end. The attachment member further includes a bent portion connected to the temperature detection wall portion,
The heat exchanger according to any one of claims 1 to 9, wherein the bent portion includes a portion bent with respect to the temperature detection wall portion along the outer surface of the connecting pipe. The temperature detection wall portion has an offset wall portion extending in a third direction intersecting the second direction from a connection portion with the extending wall portion,
The heat exchanger according to any one of claims 1 to 10, wherein a hole for attaching the temperature sensor to the temperature detection wall is provided in the offset wall.   The said temperature detection wall part is a heat exchanger of any one of Claims 1-11 which has a cut-and-raised pocket part which comprises the opening for inserting a part of said temperature sensor.   The heat exchanger according to claim 12, wherein the temperature detection wall portion has a concave portion adjacent to the opening on a surface with which the temperature detection surface of the temperature sensor comes into contact.   The heat exchanger according to claim 13, wherein the concave portion reaches a lower end of the temperature detection wall portion.   The heat exchanger according to claim 12 or 13, wherein the temperature detection wall portion has a groove-like portion extending from the opening to a lower end of the temperature detection wall portion.   The heat exchanger according to claim 15, wherein the groove-shaped portion is configured to increase in width toward the lower end of the temperature detection wall portion from the opening. The heat exchanger according to any one of claims 1 to 16,
A combustion device for generating a heating gas to be given to the heat exchanger;
A hot water device. The first heat transfer tube and the second heat transfer tube that are connected to each other by the connecting tube to which the mounting member is attached are arranged directly above a combustion region that always burns in the combustion state of the combustion device. The hot water device according to claim 17.

Images