JPH11141996A - 1 can 2 circuit heat source device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent boiling in a hot water supply heat transfer tube during circulation alone operation. In a one-can, two-circuit heat source device, a circulating heat transfer tube 23 and a hot water supply heat transfer tube 24, which are integrally formed, are located on the downstream side of a circulating combustion unit 14 and hot water supply combustion units 15 to 17 and in parallel with each other. Further, a circulation heat receiving fin portion 25 is provided downstream of the circulation combustion portion 14, and a hot water supply heat receiving fin portion 26 is fixed downstream of the hot water supply combustion portions 15 to 17. In the circulating alone operation, the heat receiving area of the circulating heat receiving fin portion 25 on the side of the hot water supply heat transfer tube 24 is formed to be small, and the amount of heat received by the hot water supply heat transfer tube 24 is suppressed. I can do it. On the contrary, since the heat receiving area of the circulation heat receiving fin portion 25 on the circulation heat transfer tube 23 side is formed wide, the circulation heat transfer tube 2
The heat receiving of No. 3 becomes efficient, and the heat loss is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-can, two-circuit heat source device used for hot water supply and heating or hot water supply and bath.

[0002]

2. Description of the Related Art Heretofore, this kind of one-can, two-circuit heat source apparatus has been generally described in JP-A-63-38852. As shown in FIGS. 6 and 7, this apparatus branches a gas conduit 5 into a circulating combustion unit 1 and hot water supply combustion units 2 to 4, and separates a gas shutoff valve 6 to 8 and a gas conduit 5 respectively. Is provided with a gas proportional valve 9 at the entrance side of the valve.
The circulation heat transfer tube 10 and the hot water supply heat transfer tube 11 are provided integrally with each other on the downstream side of the circulation combustion portion 1 and the hot water supply combustion portions 2 to 4. The heat receiving fins 12 include the circulation heat transfer tube 10 and the hot water supply heat transfer tube 1.
1 is penetrated. The combustion fan 13 includes the circulation combustion unit 1.
And the hot water supply combustion units 2 to 4.

[0003] Next, the hot water supply alone operation will be described.
When water is passed through the hot water supply heat transfer tube 11, the combustion fan 13 is driven, and at the same time, the gas proportional valve 9 is opened, and the circulation combustion unit 1 starts combustion. Then, the combustion heat is transmitted from the heat receiving fins 12 to the hot water supply heat transfer tube 11, and the hot water flows out of the hot water supply heat transfer tube 11. At that time, the gas proportional valve 9 adjusts the combustion amount so as to reach the required hot water temperature. When a large hot water supply capacity is required, the gas shutoff valves 6 to 8 are opened to open the hot water supply combustion sections 2 to 4.
Starts combustion, and the gas proportional valve 9 adjusts the amount of combustion (about 36 to 60 ° C.).

Next, considering the heat balance of the residual water in the circulation heat transfer tube 10, the circulation heat transfer tube 10 itself and the heat receiving fins 12 on the circulation heat transfer tube 10 side are connected to the circulation combustion unit 1 and the hot water supply combustion units 2 to 4. It is directly heated by the formed flame and exhaust gas. On the other hand, there is heat dissipation by heat conduction from the residual water of the circulation heat transfer tube 10 to the hot water flowing in the hot water supply heat transfer tube 11 through the contact portion between the circulation heat transfer tube 10 and the hot water supply heat transfer tube 11. In particular, since most of the combustion heat generated from the circulating combustion unit 1 and the hot water supply combustion units 2 to 4 is taken from the heat receiving fins 12 to the hot water supply heat transfer tube 11, the heat reception of the circulation heat transfer tube 10 is relatively small, The heat balance is balanced without boiling the residual water in the circulation heat transfer tube 10.

Next, the simultaneous operation of hot water supply and circulation will be described. When water is passed through the hot water supply heat transfer tube 11 and circulating hot water is sucked into the circulation heat transfer tube 10 by a circulation pump (not shown), the circulating combustion unit 1 and the hot water supply combustion units 2 to 4 are operated in the same manner as in the hot water supply alone operation. Burns (hot water supply priority control).

Then, since the heat of combustion is transmitted from the heat receiving fins 12 to the hot water supply heat transfer tube 11, hot water at a required temperature flows out of the hot water supply heat transfer tube 11. In addition, since the remaining combustion heat is transmitted from the heat receiving fins 12 to the circulation heat transfer tube 10, the circulating hot water whose temperature has increased is circulated from the circulation heat transfer tube 10 to the heat load (about 60 to 80 ° C.).

[0007]

The conventional one can 2 described above.
In the circuit-type heat source device, when circulation is requested, the gas proportional valve 9 opens and the combustion part 1 for circulation starts combustion. that time,
The gas proportional valve 9 adjusts the combustion amount so that the required circulating hot water temperature is attained. Next, since the combustion heat is transmitted from the heat receiving fins 12 to the circulation heat transfer tube 10, the circulating hot water whose temperature has increased is circulated from the circulation heat transfer tube 10 to the heat load. Next, considering the heat balance of the residual water in the hot water supply heat transfer tube 11, the heat supply fin 12 on the hot water supply heat transfer tube 11 side and the heat receiving fin 12 on the side of the hot water supply heat transfer tube 11 are used.
It is directly heated by the flame and exhaust gas formed on the surface. On the other hand, there is heat dissipation by heat conduction from the residual water of the hot water supply heat transfer tube 11 to the circulating hot water flowing in the circulation heat transfer tube 10 through the contact portion between the circulation heat transfer tube 10 and the supply heat transfer tube 11. In particular, most of the combustion heat generated from the circulating combustion section 1 is transmitted from the heat receiving fins 12 to the hot water supply heat transfer tube 11 in a relatively large amount, so that the residual water in the hot water supply heat transfer tube 11 increases in temperature until the heat balance is balanced. And
At last, it had a problem of boiling.

In addition, since the required circulation capacity of a bath or heating is generally smaller than the required hot water supply capacity, the hot water supply combustion unit 2
There is no need to perform additional operations of ~ 4. Therefore, at the time of the circulation alone operation, the circulation heat transfer tube 10 on the downstream side of the circulation combustion unit 1 is used.
And the heat receiving fins 12 adjacent to the upper part of the circulation heat transfer tube 10 are directly heated by the flame or exhaust gas formed in the combustion part 1 for circulation. On the other hand, the circulation heat transfer tube 1 downstream of the hot water supply combustion units 2 to 4
0 and the heat receiving fins 12 on the circulation heat transfer tube 10 side are the combustion fins 1
It is cooled by the air supplied from 3. That is, since the circulating hot water whose temperature has been increased in the circulating heat transfer tube 10 on the downstream side of the circulating combustion unit 1 is air-cooled, there is a problem that the thermal efficiency of the circulating operation is deteriorated.

Further, the circulation combustion section 1 is always burning during hot water supply and circulation operation, so that the circulation combustion section 1 is concentrated.
There is a problem that the heat transfer pipe 10, the hot water supply heat transfer pipe 11, and the heat receiving fins 12 on the downstream side of the circulating combustion unit 1 itself and the fin 12 are thermally degraded and corroded by dew condensation of the exhaust gas.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a one-can, two-circuit heat source device which does not boil even during circulation alone operation and has good thermal efficiency.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a hot water supply heat transfer tube, a circulation heat transfer tube, and a heat transfer tube which are provided integrally on each downstream side of a circulation combustion portion and a hot water supply combustion portion. Circulating heat receiving fins that penetrate and fix to the hot water supply heat transfer tube and the circulation heat transfer tube downstream of the combustion unit and have a large heat receiving area on the circulation heat transfer tube side and a narrow heat receiving area on the hot water supply heat transfer tube side; And a hot water supply heat receiving fin that penetrates and fixes the heat transfer tube downstream of the combustion section and the circulation heat transfer tube to form a narrow heat receiving area on the circulation heat transfer tube side and conversely widens the heat receiving area on the hot water supply heat transfer tube side. It is a thing. When circulation is requested, the heat receiving area on the circulation heat transfer tube side of the circulation heat receiving fin section is formed wider, so that the combustion heat generated from the circulation combustion section is efficiently transmitted to the circulation heat transfer pipe, and Temperature rises and circulates from the circulation heat transfer tube to the heat load.

Next, considering the heat balance of the residual water in the hot water supply heat transfer tube, the hot water supply heat transfer tube itself and the heat receiving fin portion for circulation are directly heated by the flame and exhaust gas formed in the combustion portion for circulation. on the other hand,
There is heat dissipation from the residual water of the hot water supply heat transfer tube to the circulating hot water flowing in the circulation heat transfer tube through the contact portion between the circulation heat transfer tube and the hot water supply heat transfer tube. In particular, since the heat receiving area of the circulation heat receiving fin portion on the hot water supply heat transfer tube side is formed to be small, combustion heat generated from the circulation combustion portion is not transmitted to the hot water supply heat transfer tube much.

Accordingly, the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube. In other words, since the residual water in the hot water supply heat transfer tube is maintained at a temperature slightly higher than the circulating hot water circulating, the residual water in the hot water supply heat transfer tube does not boil.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied in the form described in each claim, and is integrally formed on each downstream side of the circulation combustion section and the hot water supply combustion section as described in claim 1. The heat transfer pipes and circulation heat transfer pipes provided, and the water supply heat transfer pipes downstream of the circulating combustion section and the circulation heat transfer pipes are fixed through the heat transfer pipes to form a large heat receiving area on the circulation heat transfer pipe side, and conversely, the heat reception area on the hot water supply heat transfer pipe side Circulating heat receiving fin section, and a hot water supply heat transfer pipe downstream of the hot water supply combustion section and fixed through the circulation heat transfer pipe to form a narrow heat receiving area on the circulation heat transfer pipe side, and conversely, a heat receiving area on the hot water supply heat transfer pipe side And a heat-supplying heat-receiving fin portion formed widely.
In general, the required circulation capacity of a bath, heating, or the like is smaller than the required hot water supply capacity, so that the hot water supply combustion unit does not operate during the circulation alone operation.

Accordingly, when circulation is required, the heat receiving area of the circulation heat receiving fin portion on the side of the circulation heat transfer tube is formed wide, so that the combustion heat generated from the circulation combustion portion is efficiently transmitted to the circulation heat transfer tube, and The temperature of the hot water rises and circulates from the circulation heat transfer tube to the heat load. Next, considering the heat balance of the residual water in the hot water supply heat transfer tube, the hot water supply heat transfer tube itself and the heat receiving fin portion for circulation are directly heated by the flame and exhaust gas formed in the combustion portion for circulation. On the other hand, there is heat dissipation by heat conduction from the residual water in the hot water supply heat transfer tube to the circulating hot water flowing in the circulation heat transfer tube through the contact portion between the circulation heat transfer tube and the hot water supply heat transfer tube. In particular, this heat release is governed by the thermal resistance of the contact portion between the circulation heat transfer tube and the hot water supply heat transfer tube, and is less affected by other factors. Also, since the heat receiving area of the circulation heat receiving fin section on the hot water supply heat transfer tube side was formed narrow,
Combustion heat generated from the circulating combustion unit is not transmitted to the hot water supply tube. Therefore, the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube. In other words, since the residual water in the hot water supply heat transfer tube can be maintained at a temperature slightly higher than the circulating hot water circulating, the residual water in the hot water supply heat transfer tube does not boil.

[0016] According to a second aspect of the present invention, there is provided a circulation circuit configured to pass through the circulation heat transfer tube located at the circulation heat receiving fin portion last. When the circulation is requested, the circulation hot water and the circulation heat transfer tube provided in the circulation heat receiving fin portion flow last due to the configuration of the circulation circuit, but the circulation heat transfer tube and the hot water supply heat transfer tube side downstream of the hot water supply combustion portion. Is inevitable to be cooled by the air supplied from the combustion fan. However, the hot water circulating in the circulation heat transfer tube downstream of the hot water supply combustion section is a low-temperature return circulation hot water, so the heat loss taken by the circulating hot water due to air cooling is relatively small, and the thermal efficiency of the circulation operation is prevented from deteriorating. be able to. The temperature of the circulating hot water finally flowing into the circulating heat transfer tube provided in the circulating heat receiving fin portion is further reduced by air cooling (the temperature difference is large), and the circulating heat receiving fin portion has a heat receiving area on the circulating heat transfer tube side. Since it is formed widely, the combustion heat generated from the circulating combustion section is transmitted to the circulation heat transfer tube very efficiently, and the temperature of the circulating hot water rises and circulates from the circulation heat transfer tube to the heat load.

In the case where the circulating alone operation or the circulating hot water supply simultaneous operation is requested as described in claim 3, the circulating combustion control unit for starting the operation of the circulating combustion unit and the hot water supply independent operation are requested. In such a case, a hot water supply combustion control unit that starts operation from the hot water supply combustion unit is provided. Then, when the circulation independent operation is requested, the circulation combustion control unit starts operating the circulation combustion unit. When the simultaneous operation of the circulation hot water supply is requested, the combustion control unit for circulation starts the operation of the combustion unit for circulation, and the combustion unit for hot water supply operates according to the required capacity. Subsequently, when the hot water supply independent operation is requested, the hot water supply combustion control unit starts the operation from the hot water supply combustion unit, and the circulation combustion control unit finally performs additional operation of the circulation combustion unit according to the required capacity. This sequence reduces the chance of operating the circulating combustion unit during hot water supply operation, so that the circulating combustion unit itself, the circulating heat transfer tube downstream of the circulating combustion unit, the hot water supply heat transfer tube, and the hot water supply heat receiving fins are heated. Corrosion due to deterioration and dew condensation of exhaust gas is suppressed. Further, when the hot water supply operation is performed only by the hot water supply combustion section, the heat efficiency of hot water supply is improved by not using the circulation heat receiving fin portion having a small heat receiving area on the hot water supply heat transfer tube side.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a partial cross-sectional front view of a one-can, two-circuit heat source device according to Embodiment 1 of the present invention. FIG. 2 is a partial sectional side view of the same device. In the figure, 14
Denotes a circulating combustion section, and hot water supply combustion sections 15 to 17 are provided on both sides of the circulating combustion section 14. Also, 18 ~
Reference numeral 20 denotes a gas shutoff valve provided in the gas conduit 21. Reference numeral 22 denotes a gas proportional valve provided on the inlet side of the gas conduit 21. 2
3 is a circulation heat transfer tube. 24 is a hot water supply heat transfer tube. A hot water supply heat transfer tube 24 is arranged upstream of the circulation heat transfer tube 23, and each is brazed to form an integrated structure. The circulating heat transfer tube 23 and the hot water supply heat transfer tube 24 formed as one unit are located downstream of and in parallel with the circulating combustion unit 14 and the hot water supply combustion units 15 to 17, respectively. Reference numeral 25 denotes a circulating heat receiving fin portion having a large heat receiving area on the side of the circulation heat transfer tube 23 and conversely having a small heat receiving area on the side of the hot water supply heat transfer tube 24. It is penetrated and fixed (brazed) to the hot water supply heat transfer tube 24. Reference numeral 26 denotes a heat-supply heat receiving fin portion having a narrow heat-receiving area on the circulation heat transfer tube 23 side and a large heat-receiving area on the hot water supply heat transfer tube 24 side. It is penetrated and fixed (brazed) to the supply heat transfer tube 24. 27 is a combustion fan.

Next, the circulation alone operation will be described. In general, the required circulation capacity for a bath or heating is smaller than the required hot water supply capacity (capacity ratio of 1/4 to 1/2). Therefore, in the circulation alone operation, the hot water supply combustion units 15 to 17 are not operated. Therefore, when a circulation pump (not shown) is driven to request circulation, the circulation heat transfer tube 23 of the circulation heat receiving fin portion 25 is provided.
Since the heat receiving area on the side is formed wide, the combustion heat generated from the circulating combustion section 14 is efficiently transmitted to the circulating heat transfer tube 23,
The temperature of the circulating hot water rises and circulates from the circulating heat transfer tube 23 to a heat load (not shown) such as a bath or floor heating.

Next, considering the heat balance of the residual water in the hot water supply heat transfer tube 24, the heat supply heat transfer tube 24 itself and the heat receiving fin portion 2 for circulation are considered.
5 is directly heated by the flame or gas formed in the circulating combustion section 14. On the other hand, there is heat radiation from the residual water in the hot water supply heat transfer tube 24 to the circulating hot water flowing in the circulation heat transfer tube 23 through the contact portion (blow material) between the circulation heat transfer tube 23 and the hot water supply heat transfer tube 24. In particular, since the heat receiving area of the circulation heat receiving fin portion 25 on the side of the hot water supply heat transfer tube 24 is formed to be narrow, the circulation combustion portion 1 is formed.
The combustion heat generated from 4 is not transmitted to the hot water supply heat transfer tube 24 very much.

Therefore, the heat balance can be balanced at a relatively low temperature of the residual water in the hot water supply heat transfer tube 24. In other words, since the residual water in the hot water supply heat transfer pipe 24 can be maintained at a temperature slightly higher than the circulating hot water circulating, the hot water supply heat transfer pipe 2
The residual water of 4 does not boil. In addition, when the hot water supply alone operation or the circulating hot water supply simultaneous operation is required, the heat receiving area on the supply heat transfer tube 24 side of the heat receiving fin portion 25 for circulation is formed to be small, so that the thermal efficiency is slightly deteriorated.

(Embodiment 2) FIG. 3 is a partial cross-sectional front view of a one-can, two-circuit heat source apparatus according to Embodiment 2 of the present invention. FIG. 4 is a partial sectional plan view of the same device. The difference from the first embodiment is that the circulating combustion unit 28 and the circulating heat receiving fin unit 29 are provided on the right side, and the circulating heat transfer tube 30 provided on the circulating heat receiving fin unit 29 is finally passed through the circulating circuit so as to pass the circulating hot water. 31. That is, the circulation circuit 31 includes a circulation heat transfer tube 33 provided on the hot water supply fin 32 provided on the left side.
Is configured to first pass through the circulating hot water. The components having the same reference numerals as in the first embodiment have the same configuration, and the description will be omitted.

Next, the circulation alone operation will be described. When the circulating pump (not shown) is driven, the circulating hot water flows through the circulating circuit 31 from the circulating heat transfer tube 33 to the circulating heat transfer tube 30, but the circulating heat transfer tube 33 downstream of the hot water supply combustion units 15 to 17.
It is inevitable that the hot water supply heat receiving fins 32 on the side of the hot water supply heat transfer tube 24 will be cooled by the air supplied from the combustion fan 27. However, the hot water circulating in the circulation heat transfer pipe 33 downstream of the hot water supply combustion units 15 to 17 is a return circulating hot water having a low temperature, so that the heat loss of the circulating hot water by air cooling is relatively small, and the heat efficiency of the circulating operation deteriorates. Can be suppressed. The temperature of the circulating hot water finally flowing into the circulating heat transfer tube 30 is further lowered by air cooling (the temperature difference is large), and the heat receiving area of the circulating heat receiving fin portion 29 on the circulating heat transfer tube 30 side is widened. The combustion heat generated from the circulation combustion section 28 is transmitted to the circulation heat transfer tube 30 very efficiently, and the temperature of the circulating hot water rises and circulates from the circulation heat transfer tube 30 to the heat load.

(Embodiment 3) FIG. 5 shows a sequence of a one-can, two-circuit heat source apparatus according to Embodiment 3 of the present invention. A different point from the first embodiment is that a request determination unit 34 for determining a circulation, a hot water supply, and a simultaneous combustion mode is provided. Also, 35
Reference numerals 37 denote circulation combustion control units. 38 and 39 are hot water supply combustion control units. The components having the same reference numerals as those in the first embodiment have the same structure, and the description will be omitted.

Next, when the circulation independent operation is requested, the request determination section 34 selects the circulation combustion section 35, and the circulation combustion section 35 starts the operation of the circulation combustion section 17. When the simultaneous operation of the circulation hot water supply is requested, the request determination unit 34 selects the combustion unit 36 for circulation, and the combustion unit 36 for circulation starts the operation of the combustion unit 17 for circulation. When the total required capacity exceeds the capacity of the circulation combustion section 14, the hot water supply combustion control section 38
Drives the hot water supply combustion units 15 to 17. In addition, when the hot water supply independent operation is requested, the request determination unit 34 selects the hot water supply combustion unit 39, and the hot water supply combustion unit 39 selects the hot water supply combustion unit 15 to
Operation 17 is started.

The required capacity is determined by the hot water supply combustion units 15-1.
When the capacity exceeds 7, the circulation combustion control unit 37 finally operates the circulation combustion unit 14 additionally. According to this sequence, at the time of hot water supply operation, the opportunity to operate the circulation combustion unit 17 is reduced, so that the circulation combustion unit 17 itself and the circulation heat transfer tube 23 and the hot water supply heat transfer tube 24 downstream of the circulation combustion unit 17 are provided. In addition, the heat receiving fins 26 for hot water supply suppress heat corrosion and corrosion due to dew condensation of exhaust gas.

Further, when the hot water supply operation is performed only by the hot water supply combustion units 15 to 17, the heat efficiency of the hot water supply is improved by not using the circulation heat receiving fin portion 25 having a small heat receiving area on the hot water supply heat transfer tube 24 side. . However, since the request judging section 34 initially ignites two combustion portions, a plurality of spark plugs (not shown) are required. However, the request determination unit 3
4 selects the hot water supply combustion unit 39, the circulating combustion unit 14 first ignites, immediately transfers the fire to the hot water supply combustion unit 15 or 16, and then stops the circulation combustion unit 14. A similar effect can be obtained.

[0029]

As described above, the present invention has the following advantageous effects.

(1) Since the heat receiving area of the circulating heat receiving fin portion on the side of the hot water supply heat transfer tube is formed to reduce the amount of heat received by the hot water supply heat transfer tube, it is possible to prevent the residual water of the hot water supply heat transfer tube from boiling in the circulation alone operation. I can do it. Conversely, since the heat receiving area of the circulation heat receiving fin portion on the side of the circulation heat transfer tube is formed wide, heat can be efficiently received by the circulation heat transfer tube, and heat loss is suppressed.

(2) The circulation circuit is configured so that the circulation hot water passes through the circulation heat transfer tube provided in the circulation heat receiving fin portion last, so that the circulation heat transfer tube and the hot water supply heat transfer tube side downstream of the hot water supply combustion unit. Air cooling of the heat receiving fins for hot water supply is unavoidable, but since this circulating hot water is a low-temperature returning circulating hot water, the heat loss taken by the circulating hot water due to air cooling is relatively small, and the heat efficiency of the circulating operation is prevented from deteriorating. Can be. further,
As the temperature of the circulating hot water decreases due to the air cooling (the temperature difference increases), the thermal efficiency in the circulating heat transfer tube downstream of the circulating combustion section becomes very good.

(3) When a hot water supply operation is requested, the hot water supply combustion section starts operating, and when the required capacity exceeds the capacity of the hot water supply combustion section, finally, a sequence is provided in which the circulation combustion section is additionally operated. Therefore, during the hot water supply operation, the opportunity to operate the circulation combustion unit is reduced, so that the circulation combustion unit itself, the circulation heat transfer tube downstream of the circulation combustion unit, the hot water supply heat transfer tube, and the hot water supply heat receiving fin are thermally degraded. And corrosion due to dew condensation of exhaust gas.

[Brief description of the drawings]

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.

FIG. 2 is a partial cross-sectional side view of the apparatus according to the present invention.

FIG. 3 is a partial cross-sectional front view of a one-can, two-circuit heat source device according to a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional side view of the apparatus according to the present invention.

FIG. 5 is a sequence diagram of a one-can, two-circuit heat source device according to a third embodiment of the present invention.

FIG. 6 is a partial sectional front view of a conventional combustion device.

FIG. 7 is a partial cross-sectional side view of a conventional combustion device.

[Explanation of symbols]

 14, 28 Circulation combustion unit 15, 16, 17 Hot water supply combustion unit 23, 30 Circulation heat transfer tube 24 Hot water supply heat transfer tube 25, 29 Circulation heat receiving fin unit 26 Hot water supply heat receiving fin unit 31 Circulation circuit 35, 36, 37 Circulation Combustion control unit 38, 39 Hot water supply combustion control unit

 ──────────────────────────────────────────────────の Continued on front page (72) Inventor Hiroaki Yonekubo 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Inside

Claims (3)

[Claims] 1. A hot water supply heat transfer tube and a circulation heat transfer tube integrally provided on respective downstream sides of a circulation combustion portion and a hot water supply combustion portion, and the hot water supply heat transfer tube downstream of the circulation combustion portion. A circulating heat-receiving fin portion penetratingly fixed to the circulating heat transfer tube, forming a large heat-receiving area on the circulating heat-transfer tube side, and conversely forming a narrow heat-receiving area on the hot-water supply heat transfer tube side; One can 2 circuit having a hot water supply heat transfer tube and a hot water supply heat receiving fin portion penetratingly fixed to the circulation heat transfer tube and having a small heat receiving area on the circulation heat transfer tube side and having a large heat reception area on the hot water supply heat transfer tube side Type heat source device. 2. A one-can, two-circuit heat source device according to claim 1, further comprising a circulation circuit configured to pass through the circulation heat transfer tube located at the circulation heat receiving fin portion last. 3. A circulation combustion control unit for starting operation of the circulation combustion unit when the circulation independent movement or the simultaneous operation of the circulation hot water supply is requested, and an operation from the hot water supply combustion unit when the circulation hot water sole operation is requested. The one-can two-circuit heat source device according to claim 1 or 2, further comprising a hot water supply combustion control unit to be started.