JP6157939B2 - Combustion device - Google Patents

Description

  According to the present invention, a burner is disposed in the lower part of the apparatus main body, a heat exchanger is disposed in the upper part of the burner in the apparatus main body, and the temperature detection means provided in the apparatus main body The present invention relates to a combustion apparatus capable of detecting the temperature of combustion gas in a burner and capable of detecting clogging between a plurality of fins provided in the heat exchanger based on the temperature detected by the temperature detection means.

  For example, in Patent Documents 1 and 2, a first burner and a second burner are provided side by side in the lower part of a single can body, and the first heat exchanger is provided in the upper part of the first burner. Two heat exchangers are respectively disposed above the second burner, and the can body includes a first housing space for housing the first burner and the first heat exchanger, and the first A partition member for partitioning into a second storage space for storing the second burner and the second heat exchanger, and the first and second burners in the first and second storage spaces by a combustion fan. Discloses a combustion apparatus that supplies air necessary for combustion of the gas and air necessary for cooling the surface of the partition member.

  Further, in this combustion apparatus, the partition member has a hollow structure having two wall plates on the first housing space side and the second housing space side, and a gap between the two wall plates, and the combustion fan Air is supplied to the gap, and a rod-shaped temperature detecting means having a temperature sensitive element at the tip is inserted into the gap, and the temperature sensitive element is disposed in a non-contact manner on both side plates.

  In this combustion apparatus, the first heat exchanger and the second heat exchanger are disposed below the one heat exchanger due to clogging between a plurality of fins provided in one of the heat exchangers. When the burned combustion gas of the burner is biased toward the partition member, the temperature of one wall plate located on the side of the housing section that houses the burner becomes higher than normal. Then, the temperature sensing element receives radiant heat from the one wall plate, and the temperature detected by the temperature detecting means reaches a predetermined clogging detection temperature, thereby detecting clogging between the fins of the one heat exchanger. it can.

Japanese Patent No. 4850205 JP 2012-78035 A

  However, in general, in the combustion apparatus of Patent Documents 1 and 2, when the combustion gas flows biased toward the partition member due to clogging between the fins of one heat exchanger, in the front-rear direction of the partition member (depth direction of the can body) In the central portion, the temperature of the one wall plate rises most. Therefore, in order to accurately detect clogging between the fins, it is necessary to arrange temperature detection means in the gap so that the temperature sensitive element is located near the center. For such temperature detection means, for example, a temperature sensing element is accommodated in a metal pipe having a tip portion extending to the vicinity of the center, and a filler for protecting the temperature sensing element is provided in the metal pipe. When filled, the filling length of the filling material becomes remarkably longer than that of a general-purpose product temperature detection means. Then, since the temperature detection means must be manufactured individually rather than a general-purpose product, there is a concern that the manufacturing cost of the temperature detection means increases.

  Furthermore, in the above combustion apparatus, although the combustion fan can cool the surface of the partition member or indirectly cool the temperature sensing element inserted into the gap by the air supplied to the first and second accommodation spaces, If the surface is cooled with a large amount of air, the amount of air supplied to the burner will exceed the minimum amount of air required for combustion, resulting in a decrease in the combustion efficiency of the burner.

  In addition to these, when the clogging between the fins of one heat exchanger occurs, the air flow in the housing space for housing the heat exchanger is obstructed, but the air flow in the gap becomes intense. For this reason, the temperature sensitive element inserted in the gap is also excessively cooled. As a result, even though clogging occurs between the fins of one heat exchanger, the temperature rise of the temperature sensing element is suppressed by this air, so that the temperature sensing element temperature is clogged and does not reach the sensing temperature. If there is, there is a concern that the accuracy of detecting clogging between the fins of the heat exchanger is lowered.

  The present invention has been proposed in view of such a situation, and suppresses the manufacturing cost of the temperature detecting means, improves the combustion efficiency of the burner, and improves the accuracy of detecting clogging between the fins of the heat exchanger. It is an object of the present invention to provide a combustion apparatus that enables the above.

In order to achieve the above object, according to the first aspect of the present invention, a burner is disposed in the lower part of the apparatus body, and a heat exchanger is disposed in the upper part of the burner in the apparatus body. The heat exchanger is heated by combustion, and the combustion fan supplies the air necessary for burning the burner and the air necessary for cooling in the apparatus main body into the apparatus main body, and temperature detection means in the apparatus main body. The temperature detecting means can detect the temperature of the combustion gas of the burner, and based on the temperature detected by the temperature detecting means, it is possible to detect clogging between the plurality of fins provided in the heat exchanger. In the combustion apparatus, the temperature detecting means has a heat sensitive rod inserted into the apparatus main body and a heat sensitive element attached to the base of the heat sensitive bar, while the burner has a first in the lower part of the apparatus main body. Burner and second A burner is provided in parallel, and as a heat exchanger, a first heat exchanger is disposed above the first burner, and a second heat exchanger is disposed above the second burner. The first heat exchanger is heated by the combustion heat of one burner, and the second heat exchanger is heated by the combustion heat of the second burner. A partition member that partitions the first housing space in which the second heat exchanger is housed and the second housing space in which the second burner and the second heat exchanger are housed. Supply the air necessary for combustion of the first burner and the second burner and the air necessary for cooling the surface of the partition member to the storage space and the second storage space. A thermal bar with a thermal element attached is inserted and the first bar is inserted by the thermal element through the thermal bar. One of the temperature of the combustion gas of the first burner and the temperature of the combustion gas of the second burner can be detected, and based on the temperature detected by the thermal element, clogging between the fins provided in the first heat exchanger One of the clogs between the fins provided in the second heat exchanger can be detected, and at least a part of the partition member is arranged at a predetermined interval in the juxtaposition direction of the first burner and the second burner. As a structure including a pair of metal plates opposed to each other, a metal support portion for supporting the heat-sensitive rod on each metal plate is disposed between the pair of metal plates, and the support portion is formed by drawing one metal. The plate is provided with a concave groove formed to be recessed toward the outside of the metal plate in a parallel arrangement direction, and a heat-sensitive rod brought into contact with the other metal plate is fitted into the concave groove. is there.
According to the second aspect of the present invention , a burner is disposed in the lower part of the apparatus main body, and a heat exchanger is disposed in the upper part of the burner in the apparatus main body, and the heat exchanger is heated by combustion of the burner. Thus, the combustion fan supplies the air necessary for burning the burner and the air necessary for cooling the apparatus main body into the apparatus main body, and the temperature detection means is provided in the apparatus main body. In the combustion apparatus, the temperature of the combustion gas of the burner can be detected by the means, and the clogging between the plurality of fins provided in the heat exchanger can be detected based on the temperature detected by the temperature detection means. Has a heat-sensitive rod inserted into the apparatus main body and a heat-sensitive element attached to the base of the heat-sensitive bar, while the first burner and the second burner are disposed as lower burners in the apparatus main body. And juxtaposed In both cases, as the heat exchanger, the first heat exchanger is disposed above the first burner, and the second heat exchanger is disposed above the second burner. The first heat exchanger is heated, and the second heat exchanger is heated by the combustion heat of the second burner so that the first burner and the first heat exchanger are accommodated in the apparatus body. A partition member that partitions the first housing space and the second housing space in which the second burner and the second heat exchanger are housed, and the combustion fan causes the first housing space and the second housing space to be separated. Heat is supplied to the space with air necessary for the combustion of the first burner and the second burner and air necessary for cooling the surface of the partition member, and a heat sensitive element is attached to the root portion inside the partition member. The rod is inserted and the temperature of the combustion gas of the first burner and the second temperature by the thermal element through the thermal rod. One of the combustion gas temperatures of the burner in the first heat exchanger can be detected, and the clogging between the fins provided in the first heat exchanger and the second heat exchanger are provided based on the temperature detected by the thermal element. One of the clogged fins can be detected, and at least a part of the partition member is opposed to the parallel arrangement direction of the first burner and the second burner at a predetermined interval. As a structure including a metal plate, a metal support portion for supporting the heat-sensitive rod is disposed on each metal plate between the pair of metal plates, and the volume of the first storage space and the volume of the second storage space The volume of one storage space was made smaller than the volume of the other storage space, and the temperature of the combustion gas of the burner stored in one storage space detected by the thermal element was compared with a preset clogging determination temperature. One accommodation space based on the comparison results It is possible to detect clogging between the fins provided in the heat exchanger accommodated in the heat exchanger. It is characterized in that it is wider than the contact area between the metal plate located on the side and the heat sensitive rod .
According to a third aspect of the present invention, in the configuration according to the first or second aspect , the partition member is provided with a blocking member that prevents communication between the inside and the outside of the partition member. is there.
According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the thermal conductivity of the heat-sensitive rod is higher than the thermal conductivity of each of the metal plates and the support portion. It is what.

According to the first and second aspects of the present invention, the temperature detecting means can be manufactured simply by attaching the thermosensitive element to the base of the heat-sensitive rod, which is a general-purpose product, and therefore the manufacturing cost of the temperature detecting means can be reduced.
Furthermore, when a thermal element is attached to the base of the thermal rod inserted in the apparatus main body, the thermal element is in the longitudinal direction in the apparatus main body where the temperature rises most when clogging occurs between the fins of the heat exchanger. Can be placed away from the center. Therefore, it is not necessary to supply a large amount of cooling air into the apparatus main body in order to improve the heat resistance of the thermal element. Accordingly, the amount of air supplied into the apparatus main body may be set to the minimum amount of air necessary for burning the burner, so that the combustion efficiency of the burner can be improved.
In addition to this, since it is not necessary to supply a large amount of cooling air into the apparatus main body, the heat sensitive element in the apparatus main body is not excessively cooled. It is possible to detect clogging between fins of the heat exchanger with high accuracy based on heat transmitted from the inside of the apparatus main body through the rod.
In addition , when the thermal element is attached to the base of the thermal rod inserted into the partition member, the thermal element is placed in the front-rear direction of the partition member where the temperature rises most when clogging occurs between the fins of the heat exchanger. Can be placed away from the center. Therefore, it is not necessary to supply a large amount of cooling air to the surface or inner surface of the partition member in order to improve the heat resistance of the thermal element. Therefore, the amount of air supplied to the surface may be set to the minimum amount of air necessary for burning the burner, so that the combustion efficiency of the burner can be improved.
In addition, since it is not necessary to supply a large amount of cooling air to the inner surface of the partition member, the heat sensitive element inside the partition member is not forcibly cooled. It becomes possible to detect clogging between the fins of the heat exchanger with high accuracy based on the heat transferred from the partition member through the heat sensitive rod.
Further , the heat sensitive rod can be connected to the pair of metal plates via the support portion. Thereby, the heat transmitted to each metal plate by the combustion of the first burner or the combustion of the second burner can be easily transmitted to the heat sensitive rod via the support portion.
In particular, according to the first aspect of the present invention, even if the support portion of the heat sensitive rod is not formed separately from the pair of metal plates, the heat sensitive rod brought into contact with the other metal plate is The heat-sensitive rod can be easily supported between one and the other metal plates simply by being fitted into the concave grooves formed in the metal plates.
In particular, according to the second aspect of the present invention, the clogging between the fins provided in the heat exchanger accommodated in the one accommodation space is determined by determining the temperature of the combustion gas of the burner accommodated in the accommodation space and the clogging. It becomes possible to detect automatically based on the comparison result with temperature. Therefore, the clogging can be detected accurately and easily.
Further , rather than the heat transmitted to the metal plate located on the other accommodation space side by the combustion of the burner accommodated in the other accommodation space, the one accommodation space side is caused by the combustion of the burner accommodated in the one accommodation space. The heat transmitted to the metal plate located can be easily transmitted to the heat sensitive rod. Thereby, compared with the precision which the thermal element detects the temperature of the combustion gas of the burner accommodated in the other accommodation space, the said thermal element detects the temperature of the combustion gas of the burner accommodated in one accommodation space Can be increased.
According to the invention described in claim 3, since the cooling air can be prevented from flowing through the inside of the partition member by the blocking member, the thermal element inside the partition member is not forcibly cooled. This thermal element can accurately detect clogging between the fins of the heat exchanger based on the heat transmitted from the partition member via the thermal rod during combustion of the burner.
According to the fourth aspect of the present invention, the heat transmitted from each metal plate to the heat-sensitive rod via the support portion can be quickly transferred to the heat-sensitive element attached to the heat-sensitive rod.

It is a principal part longitudinal cross-sectional view of the combustion apparatus of embodiment of this invention. Crossing the main part of the combustion apparatus showing a state in which a heat-sensitive rod and a thermistor are inserted into a burner partition member that partitions the burner can body into the first burner group side and the second burner group side. FIG. It is an enlarged view of the A section in FIG. It is a disassembled perspective view of the thermal rod and the thermistor.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an internal structure of a main part of a single can multi-channel combustion apparatus 1 according to an embodiment of the present invention. In this combustion apparatus 1, the burner can body 3, the heat exchanger can body 4, and the exhaust can body 5 are arranged from the lower stage to the upper stage of the combustion apparatus 1 in the vertical direction (vertical direction in FIG. 1). The can body 2 is formed by sequentially fixing and stacking. In the present embodiment, the lower side of FIG. 1 is the lower side of the can body 2, and the upper side of FIG. The can body 2 is an example of the apparatus main body of the present invention.

  The burner can body 3 has a first burner group 6, a second burner group 7, and a burner partition member 8 disposed therein. As shown in FIG. 1, a first burner group 6 and a second burner group 7 each configured by arranging a plurality of burners in the left-right direction of the combustion device 1 (left-right direction in FIG. 1) are arranged inside the can body 3 for the burner. However, they are arranged in parallel in the left-right direction. A combustion fan (not shown) is attached to the lower side of the burner can body 3 (lower side in FIG. 1), and an air supply hole (not shown) opened on the bottom surface of the burner can body 3 by the combustion fan. Thus, the air necessary for the combustion of the burner groups 6 and 7 is supplied into the burner can 3. Further, air necessary for cooling the inner wall surface of the burner can body 3 is supplied from the air supply holes 9, 9... (See FIG. 2) provided at the inner edge of the burner can body 3 by the combustion fan. It is supplied to the inside of the can body 3 for the burner. In addition, the air required for cooling the surface of the burner partitioning member 8 from the air supply holes 10, 10... (See FIG. 2) is opened to the bottom surface of the burner can body 3 by the combustion fan. Supplied inside the body 3. Gas fuel is supplied to both burner groups 6 and 7. In the present embodiment, the combustion capacity of the first burner group 6 is made larger than that of the second burner group 7, and the first burner group 6 is used for hot water supply and the second burner group 7 is used for bathing. It was decided. The first burner group 6 is an example of the first burner of the present invention, and the second burner group 7 is an example of the second burner of the present invention.

  Further, as shown in FIG. 1, the burner partition member 8 is made of stainless steel and fixed to the inner surface of the burner can body 3. This burner partition member 8 is erected in the vertical direction of the combustion device 1 on the bottom surface of the burner can 3 between the first burner group 6 and the second burner group 7. The side surface of the burner partition member 8 on the first burner group 6 side is in contact with the first burner group 6, and the side surface of the burner partition member 8 on the second burner group 7 side is in contact with the second burner group 7. In this way, the burner partition member 8 partitions the inside of the burner can 3 into the arrangement side of the first burner group 6 and the arrangement side of the second burner group 7 in the left-right direction of the combustion device 1. ing. Further, the burner partitioning member 8 is arranged in the vertical direction from the substantially same height as the upper ends of the two burner groups 6 and 7 to the upper end portion (upper side in FIG. 1) of the burner can 3 in the juxtaposed direction. A pair of side plates 12 and 13 (see FIG. 3) made of stainless steel opposed to each other at a predetermined interval in the left-right direction in FIG. As shown in FIG. 3, the upper side of one side plate 12 is a first bent portion 15 that is horizontally bent toward the other side plate 13, and the upper side of the first bent portion 15 extends along the side plate 13. And a second bent portion 16 bent substantially vertically. In addition, as shown in FIG. 1, the upper ends of the side plates 12 and 13 project beyond the upper end of the burner can 3 into the heat exchanger can 4 and the upper ends of the side plates 12 and 13 receive The part 20 is fixed. A heat exchanger partition member 33 to be described later is inserted into the receiving unit 20. The receiving portion 20 has a receiving space 21 having a concave shape with a substantially U-shaped cross-section, with five surfaces except the opened upper portion being closed. Both side plates 12 and 13 are an example of a pair of metal plates of the present invention.

  As shown in FIG. 1, the heat exchanger can body 4 is provided with a hot water supply heat exchanger 23, a bath reheating heat exchanger 24, and a heat exchanger partition member 33. Inside the heat exchanger can 4, a hot water supply heat exchanger 23 and a bath reheating heat exchanger 24 are juxtaposed in the left-right direction of the combustion device 1. This hot water supply heat exchanger 23 is disposed above the first burner group 6 inside the can body 2 as shown in the figure. The upper side of the first burner group 6 corresponds to the downstream side of the flow of combustion gas generated in the first burner group 6. In addition, a plurality of fins 26 are arranged on the outer peripheral surface of the hot water supply heat exchanger 23 in the front-rear direction (front and rear direction in FIG. 1) orthogonal to the left and right direction (left and right direction in FIG. 1) of the hot water supply heat exchanger 23. ing. And each fin 26 is made to penetrate the heat receiving pipe | tube 27 comprised with the continuous pipe | tube. Water is supplied into the heat receiving pipe 27 from a water supply source (not shown), and the water is heated by the heat of the combustion gas and supplied to a hot water pipe (not shown). The hot water supply heat exchanger 23 is an example of the first heat exchanger of the present invention, and the upper side of the first burner group 6 is an example of the upper rank of the first burner of the present invention.

  On the other hand, the bath-heating heat exchanger 24 is disposed above the second burner group 7 inside the can body 2 as shown in FIG. The upper side of the second burner group 7 corresponds to the downstream side of the flow of combustion gas generated in the second burner group 7. In addition, on the outer peripheral surface of the bath-heating heat exchanger 24, the fins 31 are orthogonal to the left-right direction (left-right direction in FIG. 1) of the bath-heating heat exchanger 24, as with the hot water supply heat exchanger 23. A plurality of elements are arranged in the front-rear direction (front-rear direction in FIG. 1). And each heat sink 31 is made to penetrate each fin 31 by the continuous tube. Hot water in the bath is supplied into the heat receiving pipe 32, and the hot water is heated by the heat of the combustion gas generated in the second burner group 7 and returned to the bath. Note that the bath-heating heat exchanger 24 is an example of the second heat exchanger of the present invention, and the upper side of the second burner group 7 is an example of the upper order of the second burner of the present invention.

  The heat exchanger partition member 33 shown in FIG. 1 is accommodated between the hot water supply heat exchanger 23 and the bath reheating heat exchanger 24 so as to extend in the vertical direction of the combustion apparatus 1. As a result, the heat exchanger partition member 33 is disposed in the heat exchanger can 4 on the side where the hot water supply heat exchanger 23 is disposed and the side where the bath reheating heat exchanger 24 is disposed in the left-right direction of the combustion apparatus 1. Partition. The lower end sides of the pair of side plates 34 and 35 made of stainless steel are connected to each other via a folded portion 36 made of stainless steel and folded from the lower end side of the side plate 34 toward the lower end side of the side plate 35. Thus, the heat exchanger partition member 33 is formed to have a substantially V-shaped fork. Here, the pair of side plates 34 and 35 are connected to the folded portion 36 so as to be elastically deformable in the contact / separation direction of the side plates 34 and 35 (left and right direction in FIG. 1). Further, a receiving portion 37 is provided integrally with the upper end surface of the upper side surface of the side plate 35. The receiving portion 37 has a flat plate shape that protrudes laterally from the upper end surface to the inside of the side plate 35 and extends in the length direction of the side plate 35 (front and rear direction in FIG. 1). The receiving portion 37 is pressed downward by the pressing portion 41 of the exhaust can 5 described later.

  As shown in FIG. 1, the heat exchanger partition member 33 is combined with the burner partition member 8. For this purpose, the heat exchanger partition member 33 is replaced with the hot water supply heat exchanger 23 and the bath reheating heat exchanger while elastically deforming the pair of side plates 34 and 35 in a direction approaching each other with the folded portion 36 as a fulcrum. 24, and sequentially pushed downward toward the combustion apparatus 1. Then, the folded-back portion 36 is inserted into the receiving space 21 that is disposed on the lower side in the vertical direction of the combustion device 1 so as to face the gap between the hot water supply heat exchanger 23 and the bath reheating heat exchanger 24. Is done. In this way, the heat exchanger partition member 33 and the burner partition member 8 are combined. When both 33 and 8 are combined, the side plate 34 and the fin 26 are in close contact with each other, and the side plate 35 and the fin 31 are in close contact with each other. Accordingly, the generation of a gap between the side plate 34 and the fin 26 is suppressed, and the generation of a gap between the side plate 35 and the fin 31 is also suppressed.

  The exhaust can 5 shown in FIG. 1 introduces the combustion gas that has passed through the hot water supply heat exchanger 23 and the combustion gas that has passed through the bath reheating heat exchanger 24. A first exhaust port (not shown) is formed on the right side of the front surface of the exhaust can body 5, and a second exhaust port (not shown) is formed on the left side of the front surface of the exhaust can body 5. . In the present embodiment, the combustion gas that has passed through the hot water supply heat exchanger 23 is discharged to the outside of the exhaust can 5 through the first exhaust port. On the other hand, the combustion gas that has passed through the bath-heating heat exchanger 24 is discharged to the outside of the exhaust can 5 through the second exhaust port. An exhaust can body partitioning member is provided on the inner surface of the exhaust can body 5 between the first exhaust port and the second exhaust port in the left-right direction of the exhaust can body 5 (left-right direction in FIG. 1). 40 (hereinafter referred to as “partition member 40”) is fixed. The partition member 40 is extended in the vertical direction of the combustion device 1, and the inside of the exhaust can 5 is formed in the left-right direction of the combustion device 1 between the first exhaust port formation side and the second exhaust port formation side. Partitioning. The partition member 40 is provided with a pressing portion 41. The pressing portion 41 is formed by bending the lower end portion of the partition member 40 at a substantially right angle with the partition member 40. When the heat exchanger partition member 33 is accommodated between the hot water supply heat exchanger 23 and the bath reheating heat exchanger 24 and the exhaust can body 5 is stacked on the heat exchanger can body 4 and fixed, The part 41 is configured to press the receiving part 37 of the heat exchanger partition member 33 downward in the combustion device 1. As a result, the heat exchanger partition member 33 and the burner partition member 8 are combined in a state where the presser portion 41 is in close contact with the heat exchanger partition member 33. Therefore, the inside of the can 2 can be partitioned into a hot water supply space 44 and a bath retreating space 45 in the left-right direction of the combustion device 1. In the present embodiment, the volume of the bath replenishment space 45 is smaller than the volume of the hot water supply space 44. The hot water supply space 44 is an example of the first storage space and the other storage space of the present invention, and the bath retreating space 45 is an example of the second storage space and the one storage space. Moreover, the burner partition member 8, the heat exchanger partition member 33, and the partition member 40 are examples of the partition member of this invention.

  Further, as a feature of the present embodiment, as shown in FIGS. 2 and 3, a general-purpose heat sensitive rod 50 is inserted between the side plate 12 and the side plate 13 provided in the burner partition member 8. As shown in FIG. 4, the thermal rod 50 is made of brass and is formed into a solid cylindrical shape, and a cylindrical hole 51 extending in the axial direction of the thermal rod 50 is formed at the base of the thermal rod 50. The tip of the heat-sensitive rod 50 is opened to the front (lower side of FIG. 2) of the burner can body 3 shown in FIG. 2 so as to communicate between the outside of the burner can body 3 and the side plates 12 and 13. It is inserted from a through hole (not shown) until it reaches the center in the front-rear direction (vertical direction in FIG. 2) of the side plates 12, 13.

  As shown in FIG. 3, the side plate 13 is recessed toward the outside of the side plate 13 in the side-by-side direction (the left-right direction in FIGS. 1 to 3) of the burner groups 6 and 7 by drawing. A concave groove 53 having a semicircular cross section is formed extending to the vicinity of the center in the vertical direction (the vertical direction in FIG. 2). As shown in FIG. 3, the heat-sensitive bar 50 is brought into line contact with the inner surface of the side plate 12 and is fitted into the groove 53 so as to be supported between the side plates 12 and 13 in surface contact with the inner surface of the groove 53. Yes. Here, since the side plate 12 and the thermal rod 50 are in line contact, the concave groove 53 (side plate 13) and the thermal rod 50 are in surface contact, so the concave groove 53 (side plate 13) and the thermal rod are in contact with each other. The contact area with the rod 50 is made wider than the contact area between the side plate 12 and the heat sensitive rod 50. In the present embodiment, the heat sensitive rod 50 is made of brass, so that the heat conductivity of the heat sensitive rod 50 is made higher than the heat conductivity of the stainless steel side plates 12 and 13 and the concave groove 53. The side plate 13 is an example of one metal plate and a metal plate located on one housing space side, and the side plate 12 is an example of the other metal plate and the other metal plate located on the other housing space side. The concave groove 53 is an example of the support portion of the present invention.

  As shown in FIGS. 2 and 4, a thermistor 55 housed in a metal pipe 54 is inserted into the cylindrical hole 51 of the heat sensitive rod 50. A part of the pipe 54 is a through hole in the front of the burner can body 3 described above through a pipe insertion hole 57 (see FIG. 4) penetrating through a metal plate 56 (see FIGS. 2 and 4). To the cylindrical hole 51. And through-hole 58 (refer FIG. 4) is penetrated by the plate 56, The screw | thread 59 (refer FIG. 2) inserted in this through-hole 58 is fastened to the front of the can body 3 for burners, The plate 56 is screwed to the front face. As shown in FIGS. 2 and 4, lead wires 60, 60 connected to the thermistor 55 are drawn out from the pipe 54, and these lead wires 60, 60 perform combustion control of both the burner groups 6, 7. It is connected to a combustion control device (not shown). The thermistor 55 is an example of the thermal element of the present invention.

  Next, clogging between the plurality of fins 31, 31... Arranged in the heat exchanger for bath reheating 24 of the combustion apparatus 1 is detected during the bath reheating operation in which the second burner group 7 is burned alone. The operation | movement which performs is demonstrated. For example, in the combustion apparatus 1, the soot adheres between the fins 31, 31. If this clogging occurs, the air supplied to cool the surface of the side plate 13 by the combustion fan (see the two-dot chain line arrow in FIG. 3) is prevented from passing between the fins 31, 31. As a result, it is conceivable that the exhaust can 5 does not flow to the exhaust can body 5 side or the air necessary for the combustion of the second burner group 7 does not flow to the exhaust can body 5 side. Then, the temperature of the combustion gas generated in the second burner group 7 rises, and the side plate 13 cannot be sufficiently cooled, and the heat of the combustion gas is easily transmitted to the side plate 13, thereby the temperature of the side plate 13. Rises. When the heat is transmitted from the side plate 13 to the heat sensitive rod 50 brought into contact with the concave groove 53 (side plate 13), the temperature of the heat sensitive rod 50 rises. Furthermore, this heat is transmitted to the thermistor 55 inserted in the base part (cylinder hole 51) of the heat sensitive rod 50, so that the temperature detected by the thermistor 55 rises. In particular, in the present embodiment, since the heat-sensitive rod 50 is in surface contact with the concave groove 53 (side plate 13), heat can be easily transferred from the side plate 13 to the heat-sensitive rod 50. Furthermore, the hot water supply which burns the 1st burner group 6 independently by making the contact area of the side plate 13 (concave groove 53) and the thermal rod 50 wider than the contact area of the side plate 12 and the thermal rod 50. Rather than the heat of the combustion gas generated in the first burner group 6 during operation being transferred to the thermal rod 50 through the side plate 12, the heat of the combustion gas generated in the second burner group 7 is transferred to the side plate 13 (concave groove 53). ) Can be easily transmitted to the thermal bar 50. In addition, since the thermal conductivity of the heat sensitive rod 50 is made higher than that of the side plate 13 (concave groove 53), the heat transmitted from the side plate 13 (concave groove 53) to the heat sensitive rod 50 is converted into the heat sensitive rod. This can be quickly transmitted to the thermistor 55 inserted in the bar 50. Moreover, in this embodiment, as shown in FIG. 3, while the 1st bending part 15 of the side plate 12 extends in the opposing direction of the both-sides plates 12 and 13, the 2nd bending part 16 contact | abuts to the side plate 13, A gap is prevented from being generated between the side plates 12 and 13 above the side plates 12 and 13. Accordingly, since both the bent portions 15 and 16 prevent the communication between the inside and the outside of the side plates 12 and 13 on the upper side, the air supplied to the inside of the burner can 3 by the combustion fan It is possible to prevent the inside of the side plates 12 and 13 from flowing. Therefore, the thermistor 55 located inside the side plates 12 and 13 is not forcibly cooled by the air. In addition, the 1st bending part 15 and the 2nd bending part 16 are examples of the prevention member of this invention.

  As the degree of clogging between the fins 31, 31 of the bath-heating heat exchanger 24 becomes larger, the surface of the side plate 13 cannot be further cooled. As a result, the temperature of the side plate 13 is further increased. The detected temperature also rises. In this embodiment, when the combustion control device determines that the detected temperature of the thermistor 55 is higher than a preset clogging determination temperature (210 ° C. in this case), clogging between the fins 31, 31. Judged that there is. On the other hand, when it is determined that the detected temperature of the thermistor 55 is lower than the clogging determination temperature, it is determined that the clogging has not occurred. As described above, according to the present embodiment, it is possible to automatically detect clogging between the fins 31, 31... Based on the comparison result between the detected temperature of the thermistor 55 and the clogging determination temperature. In the present embodiment, when it is determined that the clogging between the fins 31, 31... Has occurred, the combustion control device stops the combustion of the second burner group 7.

<Effect of this embodiment>
In the combustion apparatus 1 of the present embodiment, a sensor capable of detecting the temperature of the combustion gas in the second burner group 7 can be manufactured simply by inserting the thermistor 55 into the base of the heat-sensitive rod 50 that is a general-purpose product. Production costs can be reduced.
Further, when the thermistor 55 is inserted into the base portion of the heat-sensitive rod 50 inserted between the side plates 12 and 13 (inside the burner partition member 8), the thermistor 55 is inserted into the fins 31 of the heat exchanger 24 for reheating the bath. 31... Can be arranged avoiding the central part in the front-rear direction of the side plates 12 and 13 (burner partitioning member 8) where the temperature rises most when clogging occurs. Therefore, in order to improve the heat resistance of the thermistor 55, it is not necessary to supply a large amount of cooling air to the surfaces of the side plates 12, 13 (burner partition member 8). Therefore, the amount of air supplied to the surface may be set to the minimum amount of air necessary for the combustion of the second burner group 7, so that the combustion efficiency of the second burner group 7 can be improved.
In addition to these, the first and second bent portions 15 and 16 can prevent the cooling air from flowing between the side plates 12 and 13 (inside the burner partition member 8). The heat-sensitive rod 50 (thermistor 55) inserted between 13 (inside the burner partition member 8) is not forcibly cooled. Therefore, the thermistor 55 is clogged between the fins 31, 31... Of the heat exchanger 24 for reheating the bath based on the heat transmitted from the side plate 13 via the heat sensitive rod 50 during the combustion of the second burner group 7. Can be detected with high accuracy.

  Further, the heat-sensitive rod 50 can be easily supported between the side plates 12 and 13 only by fitting the heat-sensitive rod 50 in line contact with the inner surface of the side plate 12 into the concave groove 53 formed in the side plate 13. .

  Further, the clogging between the fins 31, 31 of the bath-heating heat exchanger 24 is based on the comparison result between the detected temperature of the thermistor 55 (the temperature of the combustion gas of the second burner group 7) and the clogging determination temperature. It becomes possible to detect automatically. Therefore, the clogging can be detected accurately and easily.

  In addition, since the contact area between the side plate 13 (concave groove 53) and the heat sensitive rod 50 is made larger than the contact area between the side plate 12 and the heat sensitive rod 50, the first burner group 6 burns to the side plate 12 due to combustion. The heat transferred to the side plate 13 (concave groove 53) by the combustion of the second burner group 7 can be more easily transferred to the heat sensitive rod 50 than the heat transferred. Thereby, compared with the precision which the thermistor 55 detects the temperature of the combustion gas of the 1st burner group 6, the precision which the thermistor 55 detects the temperature of the combustion gas of the 2nd burner group 7 can be improved.

  In addition, since the thermal conductivity of the thermal rod 50 is higher than that of the side plate 13 (concave groove 53), the heat transmitted from the side plate 13 (concave groove 53) to the thermal rod 50 is converted into the thermal sensitivity. This can be quickly transmitted to the thermistor 55 inserted in the bar 50.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. In the above-described embodiment, the example in which the thermal rod 50 is inserted between the side plates 12 and 13 (inside the burner partition member 8) is shown, but the present invention is not limited thereto. For example, without providing the burner partitioning member 8, a single burner group is arranged in the burner can body 3, and a single heat exchanger is arranged above the single burner group in the heat exchanger can body 4. Then, a thermal rod formed in the same manner as the thermal rod 50 is inserted into the burner can 3 in a state parallel to the left inner wall surface of the burner can 3, and the tip of the thermal rod is You may make it reach the center part in the front-back direction of the said single burner group. By doing so, clogging between the fins of the single heat exchanger occurs, and from the air supply holes 9, 9... (See FIG. 2) opened at the left end of the bottom surface of the can body 3 for the burner. The clogging between the fins is detected based on the rise in the detection temperature of the thermistor inserted into the heat-sensitive rod as a result of the air supplied and cooling the left inner wall surface not flowing to the exhaust can 5 side. You may do it. Also in this case, as in the first embodiment, the manufacturing cost of the sensor capable of detecting the temperature of the combustion gas of the single burner group is suppressed, the combustion efficiency of the single burner group is improved, It is possible to detect clogging between fins with high accuracy.

  Further, unlike the above-described embodiment, in addition to forming the concave groove 53 in the side plate 13, the side plate 12 is opposed to the concave groove 53 in the juxtaposed direction of both the burner groups 6 and 7 by drawing. The groove may be recessed toward the outside of 12 and extend to the vicinity of the central portion in the length direction of the side plate 12 to form a groove having a semicircular cross section. In such a case, the heat-sensitive rod can be connected to the side plates 12 and 13 by fitting the heat-sensitive rod into the concave groove 53 and the concave groove and supporting them on the side plates 12 and 13. Thereby, the heat transmitted to the side plate 13 by the combustion of the second burner group 7 can be easily transmitted to the heat sensitive rod. If the first burner group 6 is burned alone, the first burner group 6 The heat transmitted to the side plate 12 by the combustion of can be easily transmitted to the heat sensitive rod. The concave groove 53 and the concave groove are examples of the support portion of the present invention.

  Further, unlike the embodiment described above, a pair of side plates 12 in which the burner partition member 8 is opposed to each other at a predetermined interval in the juxtaposed direction of the burner groups 6 and 7 over the entire length of the combustion apparatus 1 in the vertical direction. It is good also as a structure provided with 13. FIG. In addition, unlike the above-described embodiment, the heat sensitive rod 50 may be formed of aluminum having a higher thermal conductivity than stainless steel, or a thermocouple may be used instead of the thermistor 55. In addition, unlike the above-described embodiment, when it is determined by the combustion control device that clogging has occurred between the fins 31, 31... May inform the user that the clogging has occurred. Further, unlike the embodiment described above, the can body may be formed by connecting the can body for the burner, the can body for the heat exchanger, and the can body for the exhaust in a state where they are arranged horizontally. Furthermore, unlike the above-described embodiment, a lower side of the side plate 12, a third bent portion that is horizontally bent toward the side plate 13, and a downward direction along the side plate 13 from the tip of the third bent portion. A fourth bent portion that is bent substantially vertically may be provided, or third and fourth bent portions may be provided in addition to the first and second bent portions 15 and 16.

  1 .. Combustion device, 2 .. Can body, 6 .. First burner group, 7 .. Second burner group, 8 .. Burner partition member, 12, 13 .. A pair of side plates of burner partition member, 15. · 1st bent part, 16 · · 2nd bent part, 23 · · heat exchanger for hot water supply, 24 · · heat exchanger for reheating bath, 26 · · fins of heat exchanger for hot water supply, 31 · · Heat exchanger fins for bath reheating, 33 .. Heat exchanger partition member, 40 .. Exhaust can partition member, 44 .. Hot water supply space, 45 .. Bath retreat space, 50. , 53 .. Groove, 55 .. Thermistor.

Claims (4)

A burner is disposed in the lower part of the apparatus main body, and a heat exchanger is disposed in the upper part of the burner in the apparatus main body so that the heat exchanger is heated by the combustion of the burner, and the combustion A fan supplies air necessary for combustion of the burner and air necessary for cooling the apparatus body into the apparatus body, and temperature detection means is provided in the apparatus body, and the temperature detection means According to the combustion apparatus, the temperature of the combustion gas of the burner can be detected, and the clogging between the plurality of fins provided in the heat exchanger can be detected based on the temperature detected by the temperature detection means.
While the temperature detecting means has a heat sensitive rod inserted into the apparatus main body, and a heat sensitive element attached to the base of the heat sensitive rod ,
As the burner, a first burner and a second burner are arranged in parallel in the lower part of the apparatus main body, and the first heat exchanger is arranged in the upper part of the first burner as the heat exchanger. A second heat exchanger is disposed above the second burner, and the first heat exchanger is heated by the combustion heat of the first burner, and the combustion heat of the second burner The second heat exchanger is heated by
Inside the apparatus main body, a first accommodating space in which the first burner and the first heat exchanger are accommodated, and a second accommodating space in which the second burner and the second heat exchanger are accommodated. A partition member for partitioning into the accommodation space;
By the combustion fan, air necessary for combustion of the first burner and the second burner and air necessary for cooling the surface of the partition member in the first housing space and the second housing space, Supply
The thermal rod having the thermal element attached to the root portion is inserted into the partition member, and the temperature of the combustion gas of the first burner and the second temperature are increased by the thermal element through the thermal rod. One of the combustion gas temperatures of the burner can be detected, and the clogging between the fins provided in the first heat exchanger and the second heat are based on the temperature detected by the thermal element. It is possible to detect one of the clogging between the fins provided in the exchanger,
As a structure comprising a pair of metal plates facing at least a part of the partition member at a predetermined interval in the juxtaposition direction of the first burner and the second burner,
Between the pair of metal plates, a metal support portion for supporting the heat-sensitive rod is disposed on each metal plate, and the support portion is drawn in one of the metal plates in the juxtaposition direction by drawing. A concave groove formed by being recessed toward the outside of the
The combustion apparatus , wherein the heat-sensitive rod brought into contact with the other metal plate is fitted into the concave groove . A burner is disposed in the lower part of the apparatus main body, and a heat exchanger is disposed in the upper part of the burner in the apparatus main body so that the heat exchanger is heated by the combustion of the burner, and the combustion A fan supplies air necessary for combustion of the burner and air necessary for cooling the apparatus body into the apparatus body, and temperature detection means is provided in the apparatus body, and the temperature detection means According to the combustion apparatus, the temperature of the combustion gas of the burner can be detected, and the clogging between the plurality of fins provided in the heat exchanger can be detected based on the temperature detected by the temperature detection means.
While the temperature detecting means has a heat sensitive rod inserted into the apparatus main body, and a heat sensitive element attached to the base of the heat sensitive rod,
As the burner, a first burner and a second burner are arranged in parallel in the lower part of the apparatus main body, and the first heat exchanger is arranged in the upper part of the first burner as the heat exchanger. A second heat exchanger is disposed above the second burner, and the first heat exchanger is heated by the combustion heat of the first burner, and the combustion heat of the second burner The second heat exchanger is heated by
Inside the apparatus main body, a first accommodating space in which the first burner and the first heat exchanger are accommodated, and a second accommodating space in which the second burner and the second heat exchanger are accommodated. A partition member for partitioning into the accommodation space;
By the combustion fan, air necessary for combustion of the first burner and the second burner and air necessary for cooling the surface of the partition member in the first housing space and the second housing space, Supply
The thermal rod having the thermal element attached to the root portion is inserted into the partition member, and the temperature of the combustion gas of the first burner and the second temperature are increased by the thermal element through the thermal rod. One of the combustion gas temperatures of the burner can be detected, and the clogging between the fins provided in the first heat exchanger and the second heat are based on the temperature detected by the thermal element. It is possible to detect one of the clogging between the fins provided in the exchanger,
As a structure comprising a pair of metal plates facing at least a part of the partition member at a predetermined interval in the juxtaposition direction of the first burner and the second burner,
Between the pair of metal plates, a metal support for supporting the heat-sensitive rod on each metal plate is disposed,
The volume of one storage space out of the volume of the first storage space and the volume of the second storage space is made smaller than the volume of the other storage space,
Based on the comparison result obtained by comparing the temperature of the combustion gas of the burner housed in the one housing space detected by the thermosensitive element with a preset clogging judgment temperature, the housed in the one housing space. It is possible to detect clogging between the fins provided in the heat exchanger,
Of the pair of metal plates, the contact area between the metal plate located on the one housing space side and the thermal rod, and the contact area between the metal plate located on the other housing space side and the thermal rod Combustion device characterized in that it is wider . Wherein the partition member, the combustion device according to claim 1 or 2, characterized in that a blocking member for blocking the communication between the inside and the outside of the partition member. The combustion apparatus according to any one of claims 1 to 3 , wherein the thermal conductivity of the heat-sensitive rod is higher than that of each of the metal plates and the support portion.

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