JP3858427B2 - 1 can 2 circuit heat source device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single-can two-circuit heat source device used for hot water supply and heating, or hot water supply and a bath.
[0002]
[Prior art]
Conventionally, this type of one-can two-circuit heat source device is generally as described in Japanese Patent Laid-Open No. 63-38852. As shown in FIGS. 11 and 12, this apparatus includes a circulating hot water supply / combustion unit 1 and hot water combustion units 2, 3 and branches a gas conduit 4 to gas shut-off valves 5, 6 and gas, respectively. A gas proportional valve 7 is provided at the inlet side portion of the conduit 4. The circulation heat transfer pipe 8 and the hot water supply heat transfer pipe 9 are integrally formed across the downstream sides of the circulation hot water supply / combustion section 1 and the hot water supply combustion sections 2 and 3 and are provided in a staggered manner. The circulating heat transfer tube 8 is located on the downstream side of the hot water supply heat transfer tube 9. The heat receiving fin 10 is penetrated by the circulation heat transfer tube 8 and the hot water supply heat transfer tube 9. The combustion fan 11 communicates with the circulating hot water supply / combustion unit 1 and the hot water supply combustion units 2 and 3.
[0003]
Next, the hot water supply single operation will be described. When a currant or the like is opened and water is passed through the hot water supply heat transfer tube 9, the combustion fan 11 is driven, and at the same time, the gas proportional valve 7 is opened, and the circulating hot water supply / combustion unit 1 starts combustion. The combustion heat is transmitted from the heat receiving fins 10 to the hot water supply heat transfer tube 9, and the hot water is discharged from the hot water supply heat transfer tube 9. At that time, the gas proportional valve 7 adjusts the combustion amount so that the required hot water supply temperature is obtained. When a large hot water supply capacity is required, the gas cutoff valves 5 and 6 are opened, the hot water supply combustion units 2 and 3 start combustion, and the gas proportional valve 7 adjusts the combustion amount. Next, the heat balance of the residual water in the circulating heat transfer tube 8 is considered. First, the circulating heat transfer pipe 8 itself and the heat receiving fin 10 are directly heated by the flame and exhaust gas formed in the circulating hot water supply / combustion unit 1 and the hot water supply combustion units 2 and 3. Secondly, there is heat radiation by heat conduction from the residual water of the circulating heat transfer tube 8 to the hot water flowing in the hot water supply heat transfer tube 9 through the contact portion between the circulating heat transfer tube 8 and the hot water supply heat transfer tube 9. In particular, in the first heat absorption, most of the combustion heat generated from the circulating hot water supply / combustion unit 1 and the hot water combustion units 2 and 3 is taken away from the heat receiving fins 10 to the hot water supply heat transfer tube 9. The amount of heat is relatively small, and the heat balance is balanced immediately before the residual water in the circulating heat transfer tube 8 boils.
[0004]
Next, the hot water supply / circulation simultaneous operation will be described. When a currant or the like is opened and water is passed through the hot water supply heat transfer pipe 9 and the circulating hot water is sucked into the circulation heat transfer pipe 8 by a circulation pump (not shown), the required hot water supply temperature is obtained in the same manner as in the hot water supply single operation. Thus, the circulating hot water supply / combustion unit 1 and the hot water supply combustion units 2 and 3 burn, and the gas proportional valve 7 adjusts the combustion amount (hot water supply priority control). Then, since the combustion heat is transmitted from the heat receiving fins 10 to the hot water supply heat transfer tube 9, hot water having a required temperature is discharged from the hot water supply heat transfer tube 9. Further, the remaining combustion heat is transferred from the heat receiving fins 10 to the circulating heat transfer tube 8, and although it is gradually flowing, the circulating hot water whose temperature has increased circulates from the circulating heat transfer tube 8 to the heat load (temperature increase of about 40 to 60 deg).
[0005]
[Problems to be solved by the invention]
In the conventional one-can two-circuit heat source device described above, when the circulation (bath) single operation is requested, the gas proportional valve 7 is opened and the circulating hot water supply / combustion unit 1 starts combustion. At that time, the gas proportional valve 7 adjusts the combustion amount to a constant amount. Next, since the combustion heat is transferred from the heat receiving fins 10 to the circulation heat transfer tubes 8, the circulating hot water whose temperature has increased is circulated from the circulation heat transfer tubes 8 to a bathtub (not shown). Further, since the required circulation capacity such as bath (heating) is generally smaller than the required hot water supply capacity, it is not necessary to additionally operate the hot water combustion units 2 and 3. Next, the heat balance of the residual water in the hot water supply heat transfer tube 9 will be considered.
[0006]
First, the hot water supply heat transfer tube 9 itself and the heat receiving fin 10 on the downstream side of the circulating hot water supply / combustion unit 1 are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion unit 1. Second, there is heat radiation by heat conduction from the residual water of the hot water transfer tube 9 to the circulating hot water flowing in the circulating heat transfer tube 8 through the contact portion between the circulating heat transfer tube 8 and the hot water transfer tube 9. Thirdly, the hot water supply heat transfer tubes 9 and the heat receiving fins 10 on the downstream side of the hot water supply combustion units 2 and 3 are cooled by the air supplied from the combustion fan 11. In particular, in the first heat absorption, since the flame and exhaust gas generated from the circulating hot water supply / combustion unit 1 heats the hot water supply heat transfer tube 9 itself and the heat receiving fins 10, the heat absorption amount of the hot water supply heat transfer tube 9 is large. In spite of this heat dissipation, there has been a problem that the temperature of the residual water in the hot water supply heat transfer tube 9 rises and eventually boils until the heat balance is balanced. In the heating single operation, the gas proportional valve 7 adjusts the combustion amount so that the required circulating hot water temperature is obtained.
[0007]
In addition, when simultaneous operation of circulating hot water is required, naturally, the heat absorption distribution between the circulating heat transfer tube 8 and the hot water supply heat transfer tube 9 is affected by the flow rate and temperature, but the ratio is almost constant ( For example, circulation: hot water supply = 1: 5). Also, hot water supply is preferentially controlled, while the circulation continues. Therefore, when the required hot water supply capacity is small, the circulation capacity is very small and the temperature of the circulating hot water hardly increases. On the other hand, when the required hot water supply capacity is large, the circulation capacity becomes very large and the circulating hot water has a problem of high temperature.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and to provide a single-can two-circuit type heat source device that does not boil even in a single circulation operation and has high thermal efficiency.
[0009]
[Means for Solving the Problems]
To solve the above problems, the present invention , Circulating hot water / combustion section and hot water combustion section It is arranged across each downstream side and it is integrated in the vertical direction. The hot water transfer pipe, the circulating heat transfer pipe, and the hot water transfer pipe and the circulating heat transfer pipe downstream of the circulating hot water combined use combustion section are fixed to the circulating heat transfer pipe side to increase the heat receiving area of the hot water transfer pipe side. A small heat-receiving fin for circulating hot water supply and a hot-water heat transfer pipe and a circulating heat transfer pipe on the downstream side of the hot water combustion section are formed to reduce the heat-receiving area on the circulating heat-transfer pipe side, and conversely the heat-receiving area on the hot-water heat transfer pipe side. A large-sized heat-receiving fin for hot water supply is provided. And when circulating single operation is required, the heat receiving area on the circulating heat transfer tube side of the circulating hot water supply / heat receiving fin is large, so the combustion heat generated from the circulating hot water supply / combustion section is efficiently transferred to the circulating heat transfer tube The circulating hot water rises in temperature and circulates from the circulating heat transfer tube to the heat load.
[0010]
Next, let us consider the heat balance of the residual water in the hot water transfer tube. First, the hot water supply heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the circulating hot water supply / combustion section are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion section. However, since the heat receiving area on the hot water transfer tube side of the circulating hot water supply / heat receiving fin is formed small, heat conduction through the circulating hot water supply / heat receiving fin is small, and the heat absorption amount of the hot water supply heat transfer tube is reduced. Second, there is heat dissipation by heat conduction from the residual water of the hot water heat transfer tube to the circulating hot water flowing in the circulating heat transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Third, the hot-water supply heat transfer pipe itself and the hot-water supply heat-receiving fins on the downstream side of the hot-water supply combustion section are air-cooled by the air ejected from the hot-water supply combustion section. In particular, since the heat receiving fin for hot water supply has a large heat receiving area on the hot water transfer tube side, the amount of heat released from the hot water transfer tube increases.
[0011]
Therefore, since the third heat radiation is improved and the first heat absorption is suppressed, the heat balance can be balanced at a low temperature of the residual water in the hot water supply heat transfer tube. In other words, the residual water in the hot water transfer tube is maintained at a temperature slightly higher than the circulating hot water being circulated, so the residual water in the hot water transfer tube does not boil. On the other hand, since the heat receiving fin for hot water supply forms a small heat receiving area on the circulating heat transfer tube side, the heat radiation amount of the circulating heat transfer tube is small. Accordingly, since the circulating hot water heated by the circulating hot water supply / combustion unit and heated is not cooled by air, the efficiency of the circulating heat can be improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can be carried out in the form described in each claim. As described in claim 1, the circulating hot water combined use combustion section and the hot water supply combustion section are provided. It is arranged across each downstream side and it is integrated in the vertical direction. The hot water transfer pipe, the circulating heat transfer pipe, and the hot water transfer pipe and the circulating heat transfer pipe downstream of the circulating hot water combined use combustion section are fixed to the circulating heat transfer pipe side to increase the heat receiving area of the hot water transfer pipe side. A small heat-receiving fin for circulating hot water supply and a hot-water heat transfer pipe and a circulating heat transfer pipe on the downstream side of the hot water combustion section are formed to reduce the heat-receiving area on the circulating heat-transfer pipe side, and conversely the heat-receiving area on the hot-water heat transfer pipe side. A large-sized heat-receiving fin for hot water supply is provided. And when circulating single operation is required, the heat receiving area on the circulating heat transfer tube side of the circulating hot water supply / heat receiving fin is large, so the combustion heat generated from the circulating hot water supply / combustion section is efficiently transferred to the circulating heat transfer tube The circulating hot water rises in temperature and circulates from the circulating heat transfer tube to the heat load.
[0013]
Next, let us consider the heat balance of the residual water in the hot water transfer tube. First, the hot water supply heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the circulating hot water supply / combustion section are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion section. However, since the heat receiving area on the hot water transfer tube side of the circulating hot water supply / heat receiving fin is formed small, heat conduction through the circulating hot water supply / heat receiving fin is small, and the heat absorption amount of the hot water supply heat transfer tube is reduced. Second, there is heat dissipation by heat conduction from the residual water of the hot water heat transfer tube to the circulating hot water flowing in the circulating heat transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Thirdly, the hot water supply heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the hot water supply combustion section are air-cooled by the air ejected from the hot water supply combustion section. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water transfer tube. In other words, the residual water in the hot water transfer tube is maintained at a temperature slightly higher than the circulating hot water being circulated, so the residual water in the hot water transfer tube does not boil.
[0014]
Further, the hot water supply heat transfer tube and the circulation heat transfer tube provided in an integrated configuration across the downstream side of the circulating hot water supply / combustion portion and the hot water supply combustion portion as described in claim 2 are circulated as compared with the hot water supply combustion portion side. It has a hot water supply heat transfer tube and a heat receiving fin that is fixed to the circulating heat transfer tube so that the hot water supply / combustion part side is sparse. And the heat balance of the residual water of the hot-water supply heat exchanger tube in the case where the circulation single operation is required is considered. First, the heat receiving fins are arranged so that the circulating hot water / combustion unit side is sparser than the hot water combustion unit side, so the heat absorption per unit length of the circulating heat transfer tube on the circulating hot water / combustion unit side is reduced. To do. Second, there is heat dissipation by heat conduction from the residual water of the hot water heat transfer tube to the circulating hot water flowing in the circulating heat transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Thirdly, the heat receiving fins on the downstream side of the hot water supply combustion section and the hot water supply heat transfer tube themselves are air-cooled by the air ejected from the hot water combustion section. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water transfer tube. In other words, since the residual water in the hot water supply heat transfer tube is maintained at a temperature higher than the circulating hot water being circulated, boiling of the residual water in the hot water supply heat transfer tube can be suppressed.
[0015]
Also, as compared with the hot water supply heat exchanger tube and the circulating heat transfer tube provided in an integrated configuration across the downstream side of the circulating hot water supply combined combustion portion and the hot water supply combustion portion as described in claim 3, it is circulated as compared with the hot water supply combustion portion side. It has a hot water supply heat transfer tube and a heat receiving fin that is fixed to the circulating heat transfer tube by reducing the thickness of the hot water supply / combustion unit. And the heat balance of the residual water of the hot-water supply heat transfer tube when circulation is required is considered. First, since the thickness of the heat receiving fin is made thinner on the circulating hot water supply / combustion part side than on the hot water supply combustion part side, the amount of heat absorbed per unit length of the circulating heat transfer tube on the circulating hot water supply / combustion part side is reduced. Second, there is heat dissipation by heat conduction from the residual water of the hot water heat transfer tube to the circulating hot water flowing in the circulating heat transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Thirdly, the heat receiving fins on the downstream side of the hot water supply combustion section and the hot water supply heat transfer tube themselves are air-cooled by the air ejected from the hot water combustion section. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water transfer tube. In other words, since the residual water in the hot water supply heat transfer tube is maintained at a temperature higher than the circulating hot water being circulated, boiling of the residual water in the hot water supply heat transfer tube can be suppressed.
[0016]
Further, as described in claim 4 , A hot water supply heat transfer tube and a circulation heat transfer tube provided in a lattice shape in an integrated configuration across the downstream side of the circulation hot water supply combustion unit and the hot water supply combustion unit, and the hot water supply heat transfer tube downstream of the circulation hot water supply combustion unit A circulating hot water combined heat receiving fin that is fixedly penetrated to the circulating heat transfer tube and has a large heat receiving area on the circulating heat transfer tube side and conversely a small heat receiving area on the hot water supply heat transfer tube side, and hot water supply on the downstream side of the hot water combustion section It has the same shape as the heat receiving fins for circulating hot water supply and fixed to the heat transfer tubes and circulating heat transfer tubes. Inverted in the vertical direction, the heat receiving area on the circulating heat transfer tube side was made smaller, and conversely the heat receiving area on the hot water supply heat transfer tube side was made larger It has a heat-receiving fin for hot water supply. And since the integrally constructed hot water supply heat transfer tube and circulation heat transfer tube are provided in a lattice shape, the circulation hot water supply heat receiving fin and the hot water supply heat receiving fin have the same shape. Vertically It can be used properly by reversing. That is, the mold can be shared. In addition, the hot water supply heat transfer tube and the circulation heat transfer tube provided in an integrated configuration are not in a lattice shape, and the same effect can be obtained even in one stage.
[0017]
Further, as described in claim 5 , When the hot water supply single operation is requested, the operation of the hot water combustion unit is preferentially started, or when the circulation single operation is requested, Circulation An independent operation control unit for operating the hot water supply / combustion unit is provided. When the hot water supply independent operation is requested, the combustion control unit preferentially starts the operation of the hot water supply combustion unit, and the gas proportional valve adjusts the combustion amount so that the requested hot water supply temperature is reached. Therefore, since the heat receiving area on the hot water transfer pipe side of the hot water supply heat receiving fin is formed large, the combustion heat generated from the hot water supply combustion section can efficiently heat the hot water supply heat transfer pipe, and the hot water supply efficiency is improved. Next, consider the heat balance of the residual water in the circulating heat transfer tube. First, the circulating heat transfer tube itself and the hot water receiving fins on the downstream side of the hot water combustion section are heated by the flame and exhaust gas formed in the hot water combustion section. However, since the heat receiving area on the circulating heat transfer tube side of the hot water supply heat receiving fin is formed small, the heat conduction through the hot water receiving heat receiving fin is small, and the heat absorption amount of the circulating heat transfer tube is reduced. Secondly, there is heat release by heat conduction from the residual water of the circulating heat transfer tube to the hot water flowing in the hot water transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Third, the circulating heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the circulating hot water supply / combustion section are air-cooled by the air ejected from the circulating hot water supply / combustion section. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a low temperature of the residual water in the circulating heat transfer tube. In other words, the residual water in the circulating heat transfer tube is maintained at a slightly higher temperature than the hot water flowing through the hot water supply heat transfer tube, so that the residual water in the circulating heat transfer tube does not boil.
[0018]
Next, let us consider the heat balance of the residual water in the hot-water supply heat transfer tube when a single circulation operation is required. First, the hot water supply heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the circulating hot water supply / combustion section are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion section. However, since the heat receiving area on the hot water transfer tube side of the circulating hot water supply / heat receiving fin is formed small, heat conduction through the circulating hot water supply / heat receiving fin is small, and the heat absorption amount of the hot water supply heat transfer tube is reduced. Second, there is heat dissipation by heat conduction from the residual water of the hot water heat transfer tube to the circulating hot water flowing in the circulating heat transfer tube through the contact portion between the circulating heat transfer tube and the hot water supply heat transfer tube. Thirdly, the hot water supply heat transfer pipe itself and the circulating hot water supply / heat receiving fin on the downstream side of the hot water supply combustion section are air-cooled by the air ejected from the hot water supply combustion section. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water transfer tube. In other words, the residual water in the hot water transfer tube is maintained at a temperature slightly higher than the circulating hot water being circulated, so the residual water in the hot water transfer tube does not boil.
[0019]
In addition, when the circulating hot water supply simultaneous operation is requested as described in claim 6, if the required hot water supply capacity is small and the circulating required capacity is large, the operation of the circulating hot water combined use combustion section is preferentially started. And a simultaneous operation control unit. Then, the hot water supply combustion section burns so that the required hot water supply temperature is reached, and the gas proportional valve adjusts the combustion amount. At this time, if the actual circulation capacity is smaller than the required value (temperature rise value of circulating hot water), the combustion control unit stops the operation of the hot water supply combustion unit and preferentially starts the operation of the circulating hot water supply / combustion unit. And since the heat receiving area on the circulating heat transfer tube side of the circulating hot water supply / heat receiving fin is large, the combustion heat generated from the circulating hot water combined combustion section is efficiently transmitted to the circulating heat transfer tube, and the circulating hot water further rises in temperature and circulates. Circulate from heat transfer tube to heat load. Conversely, the heat receiving area on the side of the hot water transfer tube of the circulating hot water supply heat receiving fin is small, so the amount of heat absorbed by the hot water transfer tube is suppressed, and the gas proportional valve burns to maintain the hot water supply temperature at the required temperature. Increase. (Hot water supply priority control) As a result, the circulation capacity is improved, the temperature of the circulating hot water rises and approaches the target temperature.
[0020]
In addition, when the circulating hot water supply simultaneous operation is requested as described in claim 7, when the required hot water supply capacity is large and conversely the circulating required capacity is small, the operation of the hot water combustion unit is preferentially started. It has a simultaneous operation control part. And a circulating hot water supply combined combustion part burns so that it may become the requested | required warm water temperature, and a gas proportional valve adjusts the amount of combustion. At that time, if the actual circulation capacity is greater than the required value (temperature rise value of circulating hot water), the combustion control unit stops the operation of the circulating hot water supply combustion unit and preferentially starts the operation of the hot water supply combustion unit. Therefore, since the heat receiving area on the hot water transfer tube side of the hot water supply heat receiving fin is formed large, the combustion heat generated from the hot water supply combustion section efficiently heats the hot water supply heat transfer tube. Conversely, since the heat receiving area on the circulating heat transfer tube side of the circulating hot water supply combined heat receiving fin is formed small, the heat absorption amount of the circulating heat transfer tube is reduced. That is, the amount of combustion decreases in order to maintain the hot water supply temperature at the required temperature. (Hot-water supply priority control) As a result, the hot-water supply capacity is improved (the circulation capacity is lowered), and the temperature of the circulating hot water is suppressed to approach the target temperature.
[0021]
In addition, in Claims 1-4, even if it comprises integrally between hot water supply heat exchanger tubes or circulation heat exchanger tubes, an effect does not change.
[0022]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
Example 1
FIG. 1 is a partial cross-sectional front view of a one-can two-circuit heat source device according to a first embodiment of the present invention. 2 and 3 are partial sectional side views of the apparatus. In the figure, reference numeral 12 denotes a circulating hot water supply / combustion unit. Hot water supply combustion units 13 and 14 are provided on both sides of the circulating hot water supply / combustion unit 12. Reference numerals 15 and 16 denote gas cutoff valves provided in the branched gas conduit 17. Reference numeral 18 denotes a gas proportional valve provided on the inlet side of the gas conduit 17. Reference numeral 19 denotes a circulating heat transfer tube. Reference numeral 20 denotes a hot water supply heat transfer tube. A hot water supply heat transfer tube 20 is disposed upstream of the circulation heat transfer tube 19 and brazed to form an integrated structure. The integrated circulation heat transfer pipe 19 and hot water supply heat transfer pipe 20 are provided in a staggered manner across the downstream sides of the circulation hot water supply / combustion section 12 and the hot water supply combustion sections 13 and 14. 21 has a large heat receiving area on the lower and upper circulating heat transfer tubes 19 side, conversely a smaller heat receiving area on the lower hot water supply heat transfer tube 20 side, and further has a notch 22 on the upper hot water supply heat transfer tube 20 side. The circulating hot water supply / heat receiving fin is fixed to the circulating heat transfer pipe 19 and the hot water supply heat transfer pipe 20 on the downstream side of the circulating hot water supply / combustion unit 14 by brazing. 23 is provided with a notch 24 on the lower circulating heat transfer tube 19 side, further reduces the heat receiving area on the upper circulating heat transfer tube 19 side, and conversely increases the heat receiving area on the hot water supply heat transfer tube 20 side. These are pierced and fixed (braded) to the circulating heat transfer tube 19 and the hot water supply heat transfer tube 20 on the downstream side of the hot water supply heat transfer tube 20. The combustion fan 25 communicates with the circulating hot water supply / combustion unit 12 and the hot water supply combustion units 13 and 14.
[0024]
Next, circulation (bath) single operation will be described. When circulating hot water is sucked into the circulating heat transfer pipe 19 by a bath circulation pump (not shown), the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened, and the circulating hot water supply / combustion unit 12 starts combustion. Thereafter, the gas proportional valve 18 adjusts the combustion amount to a constant amount (the temperature of the circulating hot water gradually changes). Since the heat receiving area on the circulating heat transfer pipe 19 side of the circulating hot water supply / heat receiving fins 21 is large, the combustion heat generated from the circulating hot water supply / combustion unit 12 is efficiently transmitted to the circulating heat transfer pipe 19 and the circulating hot water is heated to a temperature. It rises and circulates from the circulating heat transfer tube 19 to a bathtub (not shown). Next, the heat balance of the residual water in the hot water transfer tube 20 will be considered. First, the hot water supply heat transfer pipe 20 itself and the circulating hot water supply / heat receiving fin 21 on the downstream side of the circulating hot water supply / combustion unit 12 are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion unit 12.
[0025]
However, since the heat receiving area on the lower hot water supply heat transfer pipe 20 side of the circulating hot water supply / heat receiving fin 21 is formed small, and the notch 22 is provided on the upper hot water supply heat transfer pipe 20 side, the heat through the circulating hot water supply heat receiving fin 21 is also provided. The conduction is small, and the amount of heat absorbed by the hot-water supply heat transfer tube 19 is reduced. Secondly, there is heat radiation by heat conduction from the residual water of the hot water supply heat transfer tube 20 to the circulating hot water flowing in the circulation heat transfer tube 19 through the contact portion (the brazing material) between the circulation heat transfer tube 19 and the hot water supply heat transfer tube 20. . Third, the hot water supply heat transfer pipe 20 and the hot water supply heat receiving fins 23 on the downstream side of the hot water supply combustion sections 13 and 14 are cooled by air blown from the combustion fan 25 and ejected from the hot water supply combustion sections 13 and 14. In particular, since the heat receiving fins 23 for hot water supply have a large heat receiving area on the hot water transfer tube 20 side, the amount of heat released from the hot water transfer tube 20 increases. As a result, the hot water supply heat transfer pipe 20 on the downstream side of the circulating hot water supply / combustion unit 12 is also indirectly air-cooled strongly. Therefore, since the third heat radiation is improved and the first heat absorption is suppressed, the heat balance can be balanced at a low temperature of the residual water in the hot water supply heat transfer tube 20. In other words, since the residual water in the hot water supply heat transfer tube 20 is maintained at a temperature slightly higher than the circulating hot water being circulated, the residual water in the hot water supply heat transfer tube 20 does not boil. In the case of a single operation of circulation (heating), the gas proportional valve 18 adjusts the amount of combustion so that the circulating hot water becomes the required temperature. On the other hand, the heat receiving fin 23 for hot water supply is provided with a notch 24 on the lower circulating heat transfer tube 19 side and further has a smaller heat receiving area on the upper circulating heat transfer tube 19 side. There are few. Therefore, since the circulating hot water heated by the circulating hot water supply / combustion unit 12 and having a temperature rise is not cooled by air, the circulating heat efficiency can be improved.
[0026]
Next, the hot water supply single operation will be described. When a currant or the like is opened and water is passed through the hot water supply heat transfer tube 20, the combustion fan 25 is driven, and at the same time, the gas proportional valve 25 is opened, and the circulating hot water supply / combustion unit 12 starts combustion. The combustion heat is transmitted from the heat receiving fins 21 to the hot water supply heat transfer tube 20, and the hot water is discharged from the hot water supply heat transfer tube 20. At that time, the gas proportional valve 18 adjusts the combustion amount so that the required hot water supply temperature is obtained. When a large hot water supply capacity is required, the gas shutoff valves 15 and 16 are opened, the hot water supply combustion sections 13 and 14 start combustion, and the gas proportional valve 18 adjusts the combustion amount (about 38 to 60 ° C.). .
[0027]
Next, considering the heat balance of the circulating heat transfer tube 19, the hot water receiving heat receiving fin 23 is provided with a notch 24 on the lower circulating heat transfer tube 19 side, further forming a smaller heat receiving area on the upper circulating heat transfer tube 19 side, On the contrary, since the heat receiving area on the lower and upper hot water supply heat transfer pipes 20 side is formed large, the hot water supply efficiency is good, the heat absorption amount of the circulation heat transfer pipe 19 is small, and the residual water of the circulation heat transfer pipe 19 is at a relatively low temperature. The heat balance can be balanced. In other words, since the residual water in the circulating heat transfer tube 19 is maintained at a temperature slightly higher than the hot water supply temperature, the residual water in the circulating heat transfer tube 19 does not boil. Subsequently, considering the heat balance of the hot water supply heat transfer pipe 20, the circulating hot water supply / heat receiving fin 21 has a small heat receiving area on the lower hot water supply heat transfer pipe 20 side, and a notch 22 is provided on the upper hot water supply heat transfer pipe 20 side. Therefore, it is inevitable that the hot water supply thermal efficiency deteriorates. In addition, even when the circulating hot water supply simultaneous operation is requested, it is inevitable that the hot water supply thermal efficiency deteriorates as in the case of the single hot water supply operation.
[0028]
(Example 2)
FIG. 4 is a partial cross-sectional front view of a one-can two-circuit heat source device according to the second embodiment of the present invention. The difference from the first embodiment is that the heat receiving fins 31 that are fixed to the circulating heat transfer pipe 29 and the hot water supply heat transfer pipe 30 are formed so that the circulating hot water supply / combustion section 28 side is sparser than the hot water supply combustion sections 26 and 27 side. That is. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0029]
Next, circulation (bath) single operation will be described. When circulating hot water is sucked into the circulation heat transfer pipe 29 by a bath circulation pump (not shown), the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened, and the circulating hot water supply / combustion unit 28 starts combustion. Thereafter, the gas proportional valve 18 adjusts the combustion amount to a constant amount. Since the heat receiving fins 31 are arranged so that the circulating hot water supply / combustion unit 28 side is sparser than the hot water supply combustion units 26 and 27, the heat absorption amount of the circulating heat transfer pipe 29 is reduced, and the temperature of the circulating hot water rises. Is suppressed.
[0030]
Next, the heat balance of the residual water in the hot water transfer tube 30 will be considered. First, since the number of heat receiving fins 31 per unit length of the circulating heat transfer tube 29 on the circulating hot water supply / combustion unit 28 side is reduced as compared with the hot water supply combustion units 26 and 27 side as described above, the circulating hot water supply combined use The amount of heat absorbed per unit length of the circulating heat transfer tube 29 on the combustion unit 28 side is reduced. Secondly, there is heat radiation by heat conduction from the residual water of the hot water supply heat transfer tube 30 to the circulating hot water flowing in the circulation heat transfer tube 29 through the contact portion between the circulation heat transfer tube 29 and the hot water supply heat transfer tube 30. Thirdly, the heat receiving fins 31 on the downstream side of the hot water supply combustion portions 26 and 27 and the hot water supply heat transfer pipe 30 themselves are air-cooled by the air ejected from the hot water supply combustion portions 26 and 27.
[0031]
That is, the hot water supply heat transfer pipe 20 on the downstream side of the circulating hot water / combustion unit 28 is also indirectly cooled by air. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption is suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube 30. In other words, since the residual water in the hot water supply heat transfer tube 30 is maintained at a temperature higher than the circulating hot water being circulated, boiling of the residual water in the hot water supply heat transfer tube 30 can be suppressed. In order to compensate for the thinned number of the heat receiving fins 31 per unit length of the circulating heat transfer tube 29 on the circulating hot water / combustion unit 28 side, the length of the circulating heat transfer tube 29 on the circulating hot water / combustion unit 28 side must be increased. I must. In other words, in order to maintain the circulation capacity, the one-can two-circuit heat source device becomes a little larger.
[0032]
Next, the hot water supply single operation will be described. When a currant or the like is opened and water is passed through the hot water supply heat transfer tube 29, the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened and the circulating hot water supply / combustion unit 28 starts combustion. The combustion heat is transmitted from the heat receiving fins 31 to the hot water supply heat transfer tube 30, and the hot water is discharged from the hot water supply heat transfer tube 30. At that time, the gas proportional valve 18 adjusts the combustion amount so that the required hot water supply temperature is obtained. When a large hot water supply capacity is required, the gas shutoff valves 15 and 16 are opened, the hot water supply combustion units 26 and 27 start combustion, and the gas proportional valve 18 adjusts the combustion amount (about 38 to 60 ° C.). .
[0033]
Next, considering the heat balance of the hot water supply heat transfer tube 30, the number of the heat receiving fins 31 per unit length of the circulation heat transfer tube 29 on the circulating hot water supply / combustion unit 28 side is reduced. . In addition, even when the circulating hot water supply simultaneous operation is requested, it is inevitable that the hot water supply thermal efficiency deteriorates as in the case of the single hot water supply operation.
[0034]
Example 3
FIG. 5 is a partial cross-sectional front view of a one-can two-circuit heat source device according to Embodiment 3 of the present invention. The difference from the first embodiment is that the thickness of the heat receiving fins 36 on the circulating hot water supply / combustion unit 35 side is made thinner than the heat receiving fins 34 on the hot water supply combustion units 32, 33 side, so that the circulating heat transfer tube 37 and the hot water supply heat transfer tube 38 It is through-fixed. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0035]
Next, circulation (bath) single operation will be described. When circulating hot water is sucked into the circulating heat transfer pipe 37 by a bath circulation pump (not shown), the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened and the circulating hot water supply / combustion unit 35 starts combustion. Thereafter, the gas proportional valve 18 adjusts the combustion amount to a constant amount.
[0036]
Next, the heat balance of the residual water in the hot water supply heat transfer pipe 38 when circulation is required will be considered. First, since the thickness of the heat receiving fins 36 is made thinner than that of the heat receiving fins 34, the fin efficiency of the heat receiving fins 36 is poor, and the amount of heat absorbed per unit length of the circulating heat transfer pipe 37 on the circulating hot water supply / combustion unit 35 side is reduced. To do. Further, the molds of the heat receiving fins 34 and 36 can be shared. Second, there is heat radiation by heat conduction from the residual water of the hot water transfer tube 38 to the circulating hot water flowing in the circulating heat transfer tube 37 through the contact portion between the circulating heat transfer tube 37 and the hot water transfer tube 38. Thirdly, the hot water supply heat transfer pipe 38 itself and the heat receiving fins 34 on the downstream side of the hot water supply combustion sections 32 and 33 are air-cooled by the air ejected from the hot water supply combustion sections 32 and 33.
[0037]
That is, the hot water supply heat transfer pipe 38 on the downstream side of the circulating hot water / combustion unit 35 is also indirectly cooled by air. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube 38. In other words, since the residual water in the hot water supply heat transfer pipe 38 is maintained at a temperature higher than the circulating hot water being circulated, boiling of the residual water in the hot water supply heat transfer pipe 38 can be suppressed.
[0038]
Next, the hot water supply single operation will be described. When the currant or the like is opened and water is passed through the hot water supply heat transfer pipe 38, the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened and the circulating hot water supply / combustion unit 28 starts combustion. Then, the combustion heat is transmitted from the heat receiving fins 36 to the hot water supply heat transfer pipe 38, and the hot water is discharged from the hot water supply heat transfer pipe 38. At that time, the gas proportional valve 18 adjusts the combustion amount so that the required hot water supply temperature is obtained. When a large hot water supply capacity is required, the gas shutoff valves 15 and 16 are opened, the hot water supply combustion units 32 and 33 start combustion, and the gas proportional valve 18 adjusts the combustion amount (about 38 to 60 ° C.). .
[0039]
Next, considering the heat balance of the hot water supply heat transfer tube 38, the thickness of the heat receiving fins 36 is made thinner than that of the heat receiving fins 34; In addition, even when the circulating hot water supply simultaneous operation is requested, it is inevitable that the hot water supply thermal efficiency deteriorates as in the case of the single hot water supply operation.
[0040]
Example 4
6 and 7 are partial cross-sectional side views of a single can / two-circuit type heat source device according to Embodiment 4 of the present invention. FIG. 8 is a partial cross-sectional front view of a single can / two circuit type heat source device according to Embodiment 4 of the present invention. The difference from the first embodiment is that the circulation heat transfer pipe 39 and the hot water supply heat transfer pipe 40 are integrally formed across the downstream side of the circulation hot water supply / combustion section 41 and the hot water supply combustion sections 42 and 43, and provided in a grid pattern. That is. The circulating hot water supply / heat receiving fins 44 are fixed to the hot water supply heat transfer pipe 40 and the circulating heat transfer pipe 39 on the downstream side of the circulating hot water supply / combustion unit 41 so as to increase the heat receiving area on the upper circulating heat transfer pipe 39 side. Notches 45 and 46 that reduce the heat receiving area on the hot water supply heat transfer tube 40 side and inhibit heat conduction in the vicinity of the lower circulation heat transfer tube 39 and the upper hot water supply heat transfer tube 40. With Yes. Further, the hot water supply heat receiving fins 47 are fixed to the hot water supply heat transfer pipes 40 and the circulation heat transfer pipes 39 on the downstream side of the hot water supply combustion section 42 and are inverted in the same shape as the circulation hot water supply heat reception fins 44. The circulating hot water supply / heat receiving fins 44 and the hot water receiving heat receiving fins 47 are provided with step press portions 48 so that the exhaust gas flows along the circulating heat transfer tubes 39 and the hot water supply heat transfer tubes 40. Further, a rectifying plate 49 is provided on the downstream side of the circulating hot water supply / heat receiving fins 44 and the hot water receiving heat receiving fins 47, and in particular, a vent hole 50 is opened in the rectifying plate 49 on the downstream side of the hot water receiving heat receiving fins 47. Yes. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0041]
Next, circulation (bath) single operation will be described. When circulating hot water is sucked into the circulation heat transfer pipe 39 by a bath circulation pump (not shown), the combustion fan 25 is driven, and at the same time, the gas proportional valve 18 is opened, and the circulating hot water supply / combustion unit 41 starts combustion. Flames and exhaust gas generated from the circulating hot water supply / combustion unit 41 flow in the vicinity of the hot water supply heat transfer tube 40 and the circulating heat transfer tube 39 by the step pushing portion 48 and the rectifying plate 49. Thereafter, the gas proportional valve 18 adjusts the combustion amount to a constant amount. (The temperature of the circulating hot water gradually changes) And, since the heat receiving area on the circulating heat transfer pipe 39 side of the circulating hot water supply / heat receiving fin 44 is formed large, the combustion heat generated from the circulating hot water supply / combustion unit 41 efficiently circulates. It is transmitted to the heat pipe 39, and the temperature of the circulating hot water rises and circulates from the circulating heat transfer pipe 39 to a bathtub (not shown). Next, the heat balance of the residual water in the hot water supply heat transfer tube 39 will be considered. First, the hot water supply heat transfer pipe 40 itself and the circulating hot water supply / heat receiving fins 44 on the downstream side of the circulating hot water supply / combustion unit 41 are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion unit 41.
[0042]
However, since the heat receiving area on the lower hot water supply heat transfer pipe 40 side is formed small and the notch 45 is provided on the upper hot water supply heat transfer pipe 40 side, the amount of heat absorbed by the hot water supply heat transfer pipe 40 is small. Secondly, there is heat radiation by heat conduction from the residual water of the hot water supply heat transfer tube 40 to the circulating hot water flowing in the circulation heat transfer tube 39 through the contact portion (the brazing material) between the circulation heat transfer tube 39 and the hot water supply heat transfer tube 40. . Third, the hot-water supply heat transfer pipe 40 itself and the hot-water supply heat receiving fins 47 on the downstream side of the hot-water supply combustion sections 42 and 43 are air-cooled by the air ejected from the hot-water supply combustion sections 42 and 43. In particular, since the heat receiving fin 47 for hot water supply has a large heat receiving area on the side of the hot water transfer tube 40, the amount of heat released from the hot water transfer tube 40 is increased. Therefore, since the third heat radiation can be improved and the first heat absorption can be suppressed, the heat balance can be balanced at a low temperature of the residual water in the hot water supply heat transfer tube 40. In other words, since the residual water in the hot water supply heat transfer tube 40 is maintained at a temperature slightly higher than the circulating hot water being circulated, the residual water in the hot water supply heat transfer tube 40 does not boil.
[0043]
Next, a hot water supply single operation in which the circulating hot water supply / combustion unit 41 and the hot water supply combustion units 42 and 43 burn will be described. The flame and exhaust gas generated from the hot water combustion sections 42 and 43 flow in the vicinity of the hot water supply heat transfer tube 40 and the lower circulation heat transfer tube 39 by the step pushing portion 48 and the rectifying plate 49, but then the exhaust gas is the upper circulation heat transfer tube 39. It flows toward the vent 50 without flowing in the vicinity.
[0044]
Therefore, the amount of heat absorbed by the upper circulating heat transfer tube 39 can be suppressed, so that the residual water temperature of the upper circulating heat transfer tube 39 can be further lowered. The circulating hot water supply / heat receiving fin 21 has a small heat receiving area on the lower hot water supply heat transfer tube 40 side, further provided with a notch 45 on the upper hot water supply heat transfer tube 40 side, and the hot water supply heat receiving fin 47 has an upper hot water supply heat transfer tube 40. Since the notch 44 is provided on the side, it is inevitable that the hot water supply thermal efficiency deteriorates.
[0045]
In addition, when the hot water supply simultaneous operation is requested, it is inevitable that the hot water supply thermal efficiency is deteriorated as in the case of the single hot water supply operation. However, since the circulation heat transfer pipe 39 and the hot water supply heat transfer pipe 40 which are integrally formed are provided in a lattice shape, the circulation hot water supply / heat receiving fins 44 and the hot water supply heat receiving fins 47 can be selectively used by inverting them in the same shape. We can make the molds common.
[0046]
(Example 5)
FIG. 9 is a partial cross-sectional front view of the single can / two circuit type heat source device according to the fifth embodiment of the present invention. The difference from the first embodiment is that the water flow detectors 53 and 54 are provided at the inlets of the circulating heat transfer pipe 51 and the hot water supply heat transfer pipe 52, respectively, and the gas conduits correspond to the circulating hot water combined combustion section 55 and the hot water supply combustion sections 56 and 57, respectively. 58 is provided with gas shut-off valves 59-61. The independent operation control unit 62 opens and closes the gas shut-off valves 59 to 61 by ON / OFF signals of the flowing water detectors 53 and 54 in order to use the circulating hot water supply / combustion unit 55 and the hot water supply combustion units 56 and 57 separately. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0047]
Next, the hot water supply single operation will be described. When a currant or the like is opened and water is passed through the hot water supply heat transfer pipe 52, the flowing water detector 52 transmits an ON signal, the gas proportional valve 18 and the gas shut-off valve 59 are simultaneously opened, and the circulating hot water supply / combustion unit 55 starts combustion. . The single operation control unit 62 opens the gas cutoff valve 60 and the hot water supply combustion unit 56 starts combustion. At that time, the gas proportional valve 18 controls the combustion amount to be constant. When a flame detector (not shown) detects a flame, the gas shut-off valve 59 is closed and only the hot water supply combustion unit 56 continues combustion. Thereafter, the gas proportional valve 18 adjusts the combustion amount so that the required hot water supply temperature is reached. When a large hot water supply capability is required, the gas shut-off valve 61 is opened and the hot water supply combustion unit 57 also starts combustion.
[0048]
Therefore, since the heat receiving area on the hot water transfer pipe 52 side of the hot water supply heat receiving fins 23 is formed large, the combustion heat generated from the hot water supply combustion sections 56 and 57 can efficiently heat the hot water supply heat transfer pipe 52, and the hot water supply efficiency is improved. improves. Next, the heat balance of the residual water in the circulating heat transfer tube 51 will be considered. First, the circulating heat transfer pipe 51 itself and the hot water receiving heat receiving fins 23 on the downstream side of the hot water combustion sections 56 and 57 are heated by the flame and exhaust gas formed in the hot water combustion sections 56 and 57. However, since the heat receiving area on the circulating heat transfer pipe 51 side of the hot water receiving heat receiving fin 23 is formed small, the heat absorption amount of the circulating heat transfer pipe 51 is reduced. Second, there is heat radiation by heat conduction from the residual water of the circulating heat transfer tube 51 to the hot water flowing in the hot water supply heat transfer tube 52 through the contact portion between the circulating heat transfer tube 51 and the hot water supply heat transfer tube 52. Thirdly, the circulating heat transfer pipe 51 itself and the circulating hot water supply / heat receiving fin 21 on the downstream side of the circulating hot water supply / combustion unit 55 are air-cooled by the air ejected from the circulating hot water supply / combustion unit 55.
[0049]
In particular, since the heat receiving fin 23 for hot water supply has a large heat receiving area on the side of the hot water transfer tube 52, the amount of heat released from the hot water transfer tube 52 increases. Therefore, the third heat radiation can be improved and the first heat absorption can be suppressed, so that the heat balance can be balanced at a low temperature of the residual water in the circulating heat transfer tube 51. In other words, the residual water in the circulation heat transfer tube 51 is maintained at a temperature slightly higher than the warm water flowing through the hot water supply heat transfer tube 52, so that the residual water in the circulation heat transfer tube 51 does not boil. However, when the maximum hot water supply capacity is required, when the gas shutoff valve 59 is further opened and all of the circulating hot water supply / combustion unit 55 and the hot water supply combustion units 56 and 57 start combustion, the circulating hot water supply / heat receiving fins 21 are used. The hot water supply efficiency is lowered, and the heat balance is balanced at a relatively high temperature of the residual water in the circulating heat transfer tube 51.
[0050]
Next, the heat balance of the residual water in the hot water supply heat transfer tube 52 when a single circulation operation is requested will be considered. First, the hot water supply heat transfer pipe 52 itself and the circulating hot water supply / heat receiving fin 21 on the downstream side of the circulating hot water supply / combustion unit 55 are heated by the flame and exhaust gas formed in the circulating hot water supply / combustion unit 55. However, since the heat receiving area on the hot water transfer tube 52 side of the circulating hot water supply / heat receiving fin 21 is formed small, the heat conduction through the circulating hot water supply / heat receiving fin 21 is small, and the amount of heat absorbed by the hot water supply heat transfer tube 52 is reduced. Second, there is heat radiation by heat conduction from the residual water of the hot water transfer tube 52 to the circulating hot water flowing in the circulating heat transfer tube 51 through the contact portion between the circulating heat transfer tube 51 and the hot water transfer tube 52. Third, the hot water supply heat transfer pipe 52 itself and the circulating hot water supply / heat receiving fins 21 on the downstream side of the hot water supply combustion sections 56 and 57 are air-cooled by the air ejected from the hot water supply combustion sections 56 and 57. Therefore, the second and third heat dissipation cannot be improved, but the first heat absorption can be suppressed, so that the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube 52. In other words, since the residual water in the hot water supply heat transfer tube 52 is maintained at a temperature slightly higher than the circulating hot water being circulated, the residual water in the hot water supply heat transfer tube 52 does not boil.
[0051]
(Example 6)
FIG. 10 is a partial cross-sectional front view of the single-can two-circuit heat source device according to the sixth embodiment of the present invention. The difference from the fifth embodiment is that temperature detectors 65 and 66 are provided at the outlets of the circulation heat transfer pipe 63 and the hot water supply heat transfer pipe 64, respectively. Further, when simultaneous operation of circulating hot water supply is requested and both the flowing water detectors 67 and 68 transmit ON signals, the simultaneous operation control unit 69 detects gas if the circulating hot water temperature detected by the temperature detector 65 does not reach the target temperature. The shutoff valves 70 and 71 are closed and the gas shutoff valve 72 is opened to preferentially start the operation of the circulating hot water supply / combustion unit 73. In addition, the thing of the same code | symbol as Example 5 has the same structure, and abbreviate | omits description.
[0052]
Then, the transition from the hot water supply single operation to the hot water supply / circulation simultaneous operation will be described. When hot water is being sucked into the circulating heat transfer pipe 63 by a circulating pump (not shown) while the hot water supply combustion sections 53 and 54 are burning, the flowing water detectors 67 and 68 both transmit an ON signal to The gas proportional valve 18 adjusts the amount of combustion so that the hot water temperature detected by the detector 66 becomes the target temperature. If the circulating hot water temperature detected by the temperature detector 65 does not reach the target temperature, the gas shut-off valve 72 is opened and the circulating hot water supply / combustion unit 73 starts combustion. Immediately thereafter, the gas shutoff valve 70 is closed to stop the combustion of the hot water supply combustion section 53. Even at that time, the gas proportional valve 18 adjusts the combustion amount so that the hot water supply temperature detected by the temperature detector 66 becomes the target temperature.
[0053]
Since the heat receiving area on the circulating heat transfer pipe 63 side of the circulating hot water supply / heat receiving fin 21 is large, the combustion heat generated from the circulating hot water supply / combustion unit 73 is efficiently transmitted to the circulating heat transfer pipe 63, and the circulating hot water is further increased. The temperature rises and circulates from the circulating heat transfer tube 63 to the heat load. On the contrary, since the heat receiving area on the hot water transfer pipe 64 side of the circulating hot water supply / heat receiving fin 21 is small, the heat absorption amount of the hot water transfer pipe 64 is suppressed, and a gas proportional valve is used to maintain the hot water supply temperature at the required temperature. 18 increases the amount of combustion. (Hot water supply priority control) As a result, the circulation capacity is improved and the temperature of the circulating hot water rises and approaches the target temperature.
[0054]
(Example 7)
FIG. 10 is a partial cross-sectional front view of a single can / two-circuit heat source device according to Examples 6 and 7 of the present invention. The difference from the fifth embodiment is that when the simultaneous hot water supply operation is requested, the hot water supply required capacity is large, and conversely, when the required hot water circulation capacity is small, the hot water combustion units 53 and 54 are preferentially operated. The simultaneous operation control unit 69 to be started is provided. In addition, the thing of the same code | symbol as Example 5 has the same structure, and abbreviate | omits description.
[0055]
Then, the transition from the independent circulation operation to the hot water supply / circulation simultaneous operation will be described. When the circulating hot water supply / combustion unit 73 is combusting, when the currant or the like is opened and water is passed through the hot water supply heat transfer pipe 64, both the water flow detectors 67 and 68 transmit ON signals, and the temperature detector 66 detects them. The gas proportional valve 18 adjusts the combustion amount so that the hot water supply temperature becomes the target temperature. If the circulating hot water temperature detected by the temperature detector 65 exceeds the target temperature, the gas shut-off valve 71 is opened and the hot water supply combustion unit 54 starts combustion. Immediately thereafter, the gas shut-off valve 72 is closed to stop the combustion of the circulating hot water supply / combustion unit 73. Even at that time, the gas proportional valve 18 adjusts the combustion amount so that the hot water supply temperature detected by the temperature detector 66 becomes the target temperature.
[0056]
Since the heat receiving area on the hot water transfer pipe 64 side of the hot water supply heat receiving fin 23 is formed large, the combustion heat generated from the hot water supply combustion section 54 efficiently heats the hot water supply heat transfer pipe 64. On the contrary, since the heat receiving area on the circulating heat transfer pipe 63 side of the hot water receiving heat receiving fin 23 is formed small, the heat absorption amount of the circulating heat transfer pipe 63 is suppressed, and the gas proportional valve 18 is used to maintain the hot water supply temperature at the required temperature. Reduces the amount of combustion. (Hot-water supply priority control) As a result, the hot-water supply capacity is improved and the temperature of the circulating hot water is lowered and approaches the target temperature.
[0057]
【The invention's effect】
As described above, the present invention has the following advantageous effects.
[0058]
(1) Since the heat receiving area for the circulating hot water supply tube is formed with a large heat receiving area on the circulating heat transfer tube side and conversely with a small heat receiving area on the hot water supply heat transfer tube side, the amount of heat absorbed by the hot water heat transfer tube is reduced during single circulation operation. Boiling of residual water in the heat transfer tube can be prevented. In addition, since the heat receiving area on the circulating heat transfer tube side of the circulating hot water supply / heat receiving fin is formed large and conversely the heat receiving area on the hot water supply heat transfer tube side is small, the amount of heat released from the circulating heat transfer tube is Less circulation heat efficiency can be improved.
[0059]
(2) Since the heat receiving fin is provided so that the circulating hot water supply / combustion part side is sparser than the hot water supply combustion part side, the amount of heat absorbed by the hot water transfer pipe on the circulating hot water supply / combustion part side is reduced, and the hot water supply heat transfer pipe Can suppress the boiling of residual water.
[0060]
(3) Since the thickness of the heat receiving fin on the side of the circulating hot water supply / combustion unit is thinner than that of the hot water supply combustion unit, the amount of heat absorbed by the hot water transfer tube on the circulating hot water supply / combustion unit side is reduced, and the hot water transfer tube remains. Water boiling can be suppressed.
[0061]
(4) Since the hot water supply heat receiving fin is provided with the same shape as that of the circulating hot water supply heat receiving fin, it is possible to prevent boiling of residual water in the hot water supply heat transfer pipe and to share the mold during the single circulation operation.
[0062]
(5) When a hot water supply single operation is requested, a combustion control unit is provided to preferentially start the operation of the hot water combustion unit, and the heat receiving area on the circulating heat transfer tube side of the hot water receiving heat fin is formed small. The heat absorption amount of the circulating heat transfer tube is small, and boiling of residual water in the circulating heat transfer tube can be prevented. On the other hand, since the heat receiving fin for hot water supply has a large heat receiving area on the side of the hot water transfer tube, the efficiency of hot water supply is improved.
[0063]
(6) A combustion control unit is provided for preferentially starting the operation of the circulating hot water supply / combustion unit when the required hot water supply capability is small when the circulating hot water supply simultaneous operation is requested and the required circulating capability is large. In addition, since the heat receiving area on the circulating heat transfer tube side is made larger and the heat receiving area on the hot water transfer tube side is made smaller, the heat absorption amount of the hot water transfer tube is reduced, and the hot water supply temperature is reduced to the required temperature. The amount of combustion increases in order to maintain the current. As a result, the circulation capacity is improved, the temperature of the circulating hot water rises and approaches the target temperature.
[0064]
(7) When the simultaneous hot water supply operation is requested, when the required hot water supply capacity is large, and conversely the required circulation capacity is small, a combustion control unit is provided to preferentially start the operation of the hot water combustion unit, In addition, since the heat receiving area on the circulating heat transfer tube side is formed larger and the heat receiving area on the hot water transfer tube side is made smaller, the heat absorption amount of the circulating heat transfer tube is reduced, and the hot water supply temperature is set to the required temperature. To maintain, the amount of combustion is reduced. As a result, the hot water supply capacity is improved, the temperature of the circulating hot water is lowered, and approaches the target temperature.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a single-can two-circuit heat source device according to a first embodiment of the present invention.
FIG. 2 is a partial sectional side view of the apparatus.
FIG. 3 is another partial sectional side view of the apparatus.
FIG. 4 is a partial cross-sectional front view of a single can two-circuit heat source device according to a second embodiment of the present invention.
FIG. 5 is a partial cross-sectional front view of a single can / two-circuit heat source device according to a third embodiment of the present invention.
FIG. 6 is a partial cross-sectional side view of a single can / two-circuit heat source device according to a fourth embodiment of the present invention.
FIG. 7 is a partial sectional side view of the apparatus.
FIG. 8 is another partial cross-sectional front view of the apparatus.
FIG. 9 is a partial cross-sectional front view of a one-can two-circuit heat source device according to a fifth embodiment of the present invention.
FIG. 10 is a partial cross-sectional front view of a single can / two-circuit heat source device according to Embodiments 6 and 7 of the present invention.
FIG. 11 is a partial sectional front view of a conventional combustion apparatus.
FIG. 12 is a partial sectional side view of a conventional combustion apparatus.
[Explanation of symbols]
12, 28, 35, 41, 53 Circulating hot water combined combustion section
13, 14, 26, 27, 32, 33, 42, 43, 56, 57 Hot water combustion section
19, 29, 37, 39 Circulating heat transfer tubes
20, 30, 38, 40 Hot water supply heat transfer tube
21, 44 Heat-receiving fins for circulating hot water supply
23, 47 Heat receiving fin for hot water supply
31, 34, 36 Heat receiving fin
62, 69 Independent operation control unit

Claims (7)

A hot water supply heat transfer tube and a circulation heat transfer tube that are arranged transversely across the downstream sides of the circulating hot water supply / combustion unit and the hot water supply combustion unit and are integrally formed in the vertical direction, and the hot water supply heat transfer tube downstream of the circulating hot water supply / combustion unit And a circulating heat supply heat receiving fin that is fixedly penetrated to the circulation heat transfer tube and has a large heat receiving area on the circulating heat transfer tube side and conversely a small heat receiving area on the hot water supply heat transfer tube side, and a downstream side of the hot water combustion section A can 2 having a hot water supply heat receiving tube and a heat receiving fin for hot water supply, which is fixedly penetrated to the circulating heat transfer tube, has a small heat receiving area on the circulating heat transfer tube side, and conversely has a large heat receiving area on the hot water transfer tube side. Circuit type heat source device.   A hot water supply heat transfer tube and a circulation heat transfer tube provided in an integrated configuration across the downstream side of the circulating hot water supply / combustion unit and the hot water supply combustion unit, and the circulating hot water supply / combustion unit side is sparser than the hot water supply combustion unit side. 1 can 2 circuit type heat source device which has the above-mentioned hot-water supply heat exchanger tube and the heat receiving fin penetrated and fixed to the circulation heat exchanger tube.   A hot-water supply heat transfer tube and a circulation heat transfer tube provided in an integrated configuration across the downstream side of the circulating hot water supply / combustion unit and the hot water supply combustion unit, and the meat on the circulating hot water supply / combustion unit side as compared with the hot water combustion unit side A one-can two-circuit heat source apparatus having a thickness and a heat receiving fin that is fixed to the hot water transfer tube and the circulating heat transfer tube. A hot water supply heat transfer tube and a circulation heat transfer tube provided in a lattice shape in an integrated configuration across the downstream side of the circulation hot water supply combustion unit and the hot water supply combustion unit, and the hot water supply heat transfer tube downstream of the circulation hot water supply combustion unit A circulating hot water combined heat receiving fin that is fixedly penetrated to the circulating heat transfer tube and has a large heat receiving area on the circulating heat transfer tube side and conversely a small heat receiving area on the hot water heat transfer tube side, and on the downstream side of the hot water combustion section The hot water supply heat transfer pipe and the circulating heat transfer pipe are penetrated and fixed and inverted in the vertical direction in the same shape as the circulating hot water supply combined use heat receiving fin, so that the heat receiving area on the circulating heat transfer pipe side is reduced, and conversely the heat reception on the hot water supply heat transfer pipe side A one-can two-circuit heat source device having a hot water receiving fin having a large area . 2. An independent operation control unit for starting the operation of the hot water supply combustion unit preferentially when the hot water supply single operation is requested, or operating the circulation hot water supply combined combustion unit when the circulation single operation is requested. 1-can 2 circuit type heat source apparatus of any one of 1-4.   A simultaneous operation control unit that preferentially starts the operation of the circulating hot water supply / combustion unit when the required capacity of hot water supply is small and the required capacity of circulation is large when the simultaneous operation of circulating hot water supply is requested. One can two-circuit type heat source device of any one of 1-4.   And a simultaneous operation control unit for preferentially starting the operation of the hot water combustion unit when the required capacity for hot water supply is large and the required capacity for circulation is small when the simultaneous operation of circulating hot water supply is requested. One can two-circuit type heat source device of any one of 1-4.

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