JPH11108442A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase in the size of a hot water supply combined device, such as a hot water supply heating bath device, to improve hot water temperature control performance when heating and reheating of a bath are effected, and reduce a running cost. SOLUTION: A pressure resisting pump 20 serving as a conveying means is arranged at a first circulation circuit 19 to circulate hot water, a first double heat-exchanger 23 serving as a forced convection type heat exchanger for heating is arranged in a spot situated upper stream, and a second heat-exchanger 24 serving as a forced convection type heat-exchanger for reheating of a bath is arranged in a spot situated downstream. Thus, since the route of the first circulation circuit 19 is shortened, the size of a pressure resisting pump 20 is reduced, and the sizes of first and second double pipe heat-exchangers 23 and 24 are reduced, the device is remarkably reduced. Further, when high- temperature water is circulated, an effect that incurring of a heat loss and a low running cost is realized is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus having a function of reheating a heating and a bath.

[0002]

2. Description of the Related Art A conventional combustion apparatus is disclosed in Japanese Utility Model Publication No. 7-14758.
There was one described in Japanese Patent Publication No. In a combustion apparatus of this type shown in FIG. 9, heating and reheating of a bath are performed in a configuration for realizing a hot water function when supplying hot water.

[0003] That is, as shown in FIG.
And tapping pipe 2 and mixing valve 3 at the end of tapping pipe 2
A return pipe 4 provided immediately before the mixing valve 3; a bypass pipe 5 provided at the outlet of the heat exchanger 1;
Heat exchanger 7 provided between the feed pipe 6 and the water supply pipe 6, a bath reheating circuit 8 and a heating circuit 9 provided in the indirect heat exchanger 7, a feed pipe 6, a bypass pipe 5, a feed pipe 6, and a return pipe. 4 together with the circulation circuit 10 and is constituted by a circulation pump 11 provided in the circulation circuit 10.

With the above configuration, when hot water is not supplied, hot water heated to a high temperature by the heat exchanger 1 is circulated by the circulation pump 11 via the return pipe 4 so that hot water can be immediately supplied. Further, by flowing hot water through the bypass pipe 5, the indirect heat exchanger 7 reheats the bath through the bath reheating circuit 8, and heats the heating through the heating circuit 9.

[0005]

However, in the above-mentioned conventional combustion apparatus, since the hot water system is used, high-temperature hot water must be circulated immediately before reaching the indoor mixing valve 3, so that the running cost is high. There has been a problem that the mixing valve 3 must be provided in order to obtain high-temperature hot water. Furthermore, since there is one indirect heat exchanger 7 and a water-water heat exchanger of a coil-shell type liquid hot water storage type and the flow paths are parallel to each other, the heat exchange efficiency is low and the hot water must be once stored in the shell. Therefore, a large and heavy heat exchanger is required, and it is difficult to control the hot water temperature necessary for heating and the hot water temperature necessary for reheating a bath.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a closed circuit is formed at an inlet and an outlet of a heat exchanger, and a first circulation circuit for circulating high-temperature hot water is provided. Conveying means for circulating hot water in the circulation circuit, a forced residence heat exchanger, a second circulation circuit that forms a circulation circuit between the forced convection heat exchanger and the load device, and in the second circulation circuit And a combustion device that operates a transfer means and a burner in conjunction with the operation of the second circulation circuit circulation pump when operating the load device.

[0007] According to the above invention, it is possible to supply a hot water at an appropriate hot water temperature and to downsize a load device having a heating function and a function of reheating a bath, so that a hot water tap does not require a mixing valve and can be a general hot water tap. It is. Further, the size and weight of the apparatus can be reduced by the highly efficient forced convection type heat exchanger.

Further, a heating operation that requires high-temperature hot water,
It is possible to easily control the reheating of the bath, which can be performed with a relatively low temperature of hot water.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied in the form described in each claim. That is, according to the combustion device of claim 1 of the present invention, a burner, a heat exchanger heated by the burner, a water supply pipe provided at an inlet of the heat exchanger, a hot water supply pipe provided at an outlet, and an inlet And a first circulation circuit forming a closed circuit at the outlet, a conveying means for circulating hot water in the first circulation circuit, a forced convection heat exchanger, and heat obtained by the forced convection heat exchanger. A load device to be used, a second circulation circuit that forms a circulation circuit between the forced convection heat exchanger and the load device, and a circulation pump for a second circulation circuit that circulates hot water in the second circulation circuit, When the load device is operated, the transport means and the burner are operated in conjunction with the operation of the circulation pump for the second circulation circuit.

[0010] By providing a forced convection type heat exchanger in the first circulation circuit and operating the load device, it is possible to provide a small-sized hot water supply combined machine having a water heater and a heating function or a bath function. The running path of high-temperature hot water circulating in the circulation circuit is short and the heat loss is small, so the running cost is low. By operating the conveying means and the burner in conjunction with the operation of the circulation pump for the second circulation circuit, it is possible to always supply combustion heat to the heat exchanger when hot water in the first circulation circuit is circulating. it can.

Further, according to the combustion apparatus of the second aspect of the present invention, the forced convection type heat exchanger includes a first forced convection type heat exchanger provided on the upstream side of the first circulation circuit and a downstream side. The second forced convection type heat exchanger provided in the, the load device has a heating device for heating, and a bath tub for reheating the bath, the first forced convection type heat exchanger Providing a second circulation circuit between the heat exchanger and the heating device, comprising a circulation pump for a second circulation circuit for circulating hot water in the second circulation circuit, a second forced convection heat exchanger and a bathtub And a third circulation circuit circulation pump for circulating bath water in the third circulation circuit.

A first forced convection type heat exchanger and a second forced convection type heat exchanger are provided from the upstream side of the first circulation circuit, and a water heater and a heating unit are operated by performing a heating operation with a heating device and a bath. A heating device that can provide a small hot water supply multifunction machine with a bath function, etc., and also exchanges heat with the high-temperature hot water circulating in the first circulation circuit in the first forced convection heat exchanger, and requires high-temperature hot water The hot water for reheating the bath, which requires hot water at a relatively low temperature, can be supplied to the bath by exchanging heat with the second forced convection heat exchanger.

According to the combustion apparatus of the third aspect of the present invention, the plurality of second forced convection type heat exchangers provided in the first circulation circuit and the plurality of second forced convection type heat exchangers are provided. It comprises a plurality of third circulation circuits provided between the exchanger and the plurality of bathtubs, and a plurality of third circulation circuit circulation pumps for circulating hot water in the plurality of third circulation circuits. .

Since a plurality of second forced convection heat exchangers and the like are provided, a single combustion device can reheat a plurality of bathtubs.

According to the combustion apparatus of the fourth aspect of the present invention, the second forced convection heat exchanger is a double-pipe heat exchanger, and the double-pipe heat exchanger is inclined. The bath water of the third circulation circuit is naturally circulated.

Then, the hot water in the first circulation circuit is forcibly circulated by the conveying means, so that the hot water in the bathtub in the third circulation circuit naturally circulates due to the heat received by the double tube heat exchanger. Therefore, since the circulation pump for the third circulation circuit can be omitted, the size of the apparatus can be reduced.

According to a fifth aspect of the present invention, there is provided a combustion apparatus in which a mixing circuit for bypassing a water supply pipe and a hot water supply pipe of a heat exchanger, and a flow rate of water flowing through the mixing circuit is controlled by a flow rate control device. It is.

Also, when hot water is supplied during the reheating of the bath or during the heating operation, the hot water at the outlet of the heat exchanger and the water in the water supply pipe are mixed in the mixing circuit to set the hot water. By driving the flow control device so that the temperature becomes high, the hot water can be discharged at a desired hot water temperature.

The combustion apparatus according to claim 6 of the present invention is characterized in that the first forced convection heat exchanger has a plate A in which the flow path of the first circulation circuit is formed in a slit shape, and a plate B which serves as a partition. And a plate C in which the flow path of the second circulation circuit is formed in a slit shape at a position facing the flow path of the first circulation circuit, and a stacked heat exchanger having a structure in which a plurality of sets are stacked and integrated. Things.

Since the first forced convection type heat exchanger for heating is a stacked type heat exchanger, not only a shell tube type heat exchanger but also a double tube type heat exchanger and a plate type heat exchanger are used. Can also be miniaturized.

Further, in the combustion apparatus according to claim 7 of the present invention, the second forced convection type heat exchanger comprises a plate A in which a flow path of the first circulation circuit is formed in a slit shape, and a plate serving as a partition. B and a plate D in which a flow path of the third circulation circuit is formed in a slit shape at a position facing the flow path of the first circulation circuit.
And a laminated heat exchanger having a structure in which a plurality of sets of plates are laminated and integrated, and a detachable filter is provided in the flow path on the third circulation circuit side of the laminated heat exchanger.

In order to make the second forced convection type heat exchanger for reheating a laminated heat exchanger, not only a shell tube type heat exchanger but also a double tube type heat exchanger and a plate type heat exchanger It is possible to further reduce the size and to trap dust circulating from the bathtub, such as hair, scale, etc., by using a filter, thereby preventing the flow path of the laminated heat exchanger from being blocked and realizing stable thermal efficiency.

In the above embodiment, a double tube heat exchanger or a laminated heat exchanger can be employed as the forced convection heat exchanger.

[0024]

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

(Embodiment 1) FIG. 1 is a configuration diagram showing a combustion apparatus according to Embodiment 1 of the present invention.

In FIGS. 1 and 2, reference numeral 12 denotes a casing of the main body, and reference numeral 13 denotes a burner, which is provided at a heat exchanger 14 for receiving exhaust heat generated by combustion in the burner 13 and at an inlet 15 of the heat exchanger 14. A hot water supply pipe 18 provided at a water supply pipe 16 and an outlet 17, a first circulation circuit 19 for forming a closed circuit at the inlet 15 and the exit 17 inside the casing 12, and hot water provided in the first circulation circuit 19; Pump 20 as a conveying means for circulating water, a first check valve 21 provided between the pressure-resistant pump 20 and the inlet 15 for preventing backflow of water, and a pressure in a pipe provided on the upstream side of the pressure-resistant pump 20. When the pressure exceeds a certain value, a pressure relief valve 22 for releasing pressure, a first double-tube heat exchanger 23 which is a first forced convection type heat exchanger, and a second which is a second forced convection type heat exchanger. A double tube heat exchanger 24,
A second circulation circuit 26 provided between the first double tube heat exchanger 23 and a heating device 25 which is one of the load devices, and a second circulation circuit 26 for circulating hot water provided in the second circulation circuit 26. A third circulation circuit 30 provided between the two-circulation circuit circulation pump 27 and the expansion tank 28, the second double-pipe heat exchanger 24 and a bathtub 29 which is one of the load devices; Third circulation circuit circulation pump 31 for circulating bath water provided in circulation circuit 30
Consists of

Next, the operation and the operation will be described. First, when the hot water tap 32 is opened, the water passes through the water supply pipe 16 and enters the heat exchanger 14 from the inlet 15 and is heated by the combustion heat of the burner 13 to be connected to the outlet 17 and the hot water supply. Hot water is supplied from the hot water tap 32 through the pipe 18.

Next, during the heating operation, the circulation pump 27 for the second circulation circuit is driven by the operation command of the heating device 25, and the pressure-resistant pump 20 is driven in conjunction therewith to ignite the burner 13. In the first circulation circuit 19, when hot water is circulated by the pressure-resistant pump 20, the hot water is heated by the combustion heat of the burner 13 and is transferred to the second circulation circuit 26 by the first double-pipe heat exchanger 23. . In the second circulation circuit 26, a second circulation circuit circulation pump 27
As a result, the hot water circulates through the second circulation circuit 26, and the heat received by the first double-pipe heat exchanger 23 is radiated by the heating device 25 to blow out hot air.

Next, during the reheating operation of the bath, the bathtub 29
The recirculation pump 31 for the third circulation circuit is driven by the reheating operation command, and the pressure-resistant pump 20 is driven in conjunction therewith to ignite the burner 13. In the first circulation circuit 19, when hot water is circulated by the pressure-resistant pump 20, the hot water is heated by the combustion heat of the burner 13 and is transferred to the third circulation circuit 30 by the second double-pipe heat exchanger 24. . In the third circulation circuit 30, bathtub water is circulated in the third circulation circuit 30 by the third circulation circuit circulation pump 31, and heat received in the second double-pipe heat exchanger 24 is transferred to the bathtub 2.
The heat is released at 9 to reheat the bath.

In the above operation, since the first circulation circuit 19 is provided inside the casing 12, the piping length is extremely short, so that the pressure loss is small and the first circulation circuit 19 can be circulated by the small pressure pump 20. That is, running loss can be suppressed with little heat loss.

The temperature of the hot water required for the heating device 25 is about 80 ° C., and the temperature of the supply to the bathtub 29 required for reheating the bath is about 60 ° C.
By providing the second circulation circuit 26 on the outlet 17 side of the heat exchanger 14, the configuration of the efficiency of the hot water temperature gradient in the first circulation circuit is improved. That is, the heating operation capability can be sufficiently ensured, and the reheating operation control of the bath can be easily performed. The third circulation circuit 30 may be provided near the outlet 17 if the reheating capacity of the bath may be slightly reduced. Further, although the forced convection type heat exchanger is a double tube heat exchanger, the same effect can be obtained as a plate type heat exchanger.

Further, in conjunction with the heating operation and the bath reheating operation, the operation shifts to the operation of heating the heat exchanger 14 after the hot water in the first circulation circuit 19 circulates.
Since no boil-off occurs, durability performance is improved.

Although the configuration in which the burner 13 supplies combustion heat to the heat exchanger 14 has been described, the combustion heat of the burner 13 is supplied to the first forced convection type heat exchanger 23 or the second forced convection type heat exchanger. If supplied directly to 24, the device can be further miniaturized.

Although an example in which two forced convection type heat exchangers are shown here is shown, as shown in FIG. 2A, only one forced convection type heat exchanger is naturally used in the first circulation circuit. The respective functions can be similarly satisfied by providing a hot water supply bath apparatus or a hot water supply / heating apparatus as shown in FIG. 2 (b).

(Embodiment 2) FIG. 3 is a bath configuration diagram showing a combustion apparatus according to Embodiment 2 of the present invention.

The second embodiment is different from the first embodiment in that three second forced convection heat exchangers 24, a third circulation circuit 30, and a circulation circuit for the third circulation circuit are provided in the first circulation circuit 20. A pump 31 is provided.

The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted. Next, the operation and operation will be described. In the first circulation circuit 19, three forced convection type heat exchangers 2 are provided.
The provision of 4 makes it possible to reheat the three bathtubs 29 at the same time. Here, a configuration is shown in which three bathtubs 29 can be refired at the same time, but the same effect can be exerted with two or three or more bathtubs.

(Embodiment 3) FIG. 4 is a configuration diagram showing a second double tube heat exchanger 24 in Embodiment 3 of the present invention. The third embodiment is different from the second embodiment in that the second double-tube heat exchanger 24 that is the second forced convection heat exchanger is configured to be inclined, and the third circulation circuit circulation pump 31 is The configuration does not exist.

The components having the same reference numerals as those of the second embodiment have the same structure, and the description is omitted. Next, an operation and an operation will be described. When high-temperature hot water passes through the first circulation circuit 19, the bathtub water passes through the outer pipe 33 of the second double pipe heat exchanger 24 and passes through the inner pipe 34. Heat. The heated bathtub water moves upward and circulates naturally to the bathtub 29. Therefore, the circulation pump 31 for the third circulation circuit for transporting the hot water for reheating to the bathtub 29 may not be necessary, so that the apparatus can be downsized.

The same effect can be obtained by circulating the first circulation circuit 19 through the inner pipe 34 of the second double pipe heat exchanger 24 and circulating the bathtub water through the outer pipe 33. .

(Embodiment 4) FIG. 5 is a block diagram showing a combustion apparatus according to Embodiment 4 of the present invention. The fourth embodiment is different from the first embodiment in that a mixing circuit 35 is provided in the water supply pipe 16 and the hot water supply pipe 18, and the mixing circuit 35 includes
A thermistor 36 provided between the heat exchanger 14 and the outlet 17 and a thermistor 37 provided on the water suction pipe 16 are provided with a water amount control valve 38 which is a flow control device for adjusting the mixing amount so as to reach a set water temperature. .

The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted. Next, the operation and the operation will be described. During the reheating of the bath or the heating operation, high-temperature hot water circulates in the first circulation circuit 19. At this time, the temperature of the hot water circulating in the first circulating circuit 19 is controlled by the thermistor 36.
The water supply temperature is detected by the thermistor 37, and the opening of the water amount control valve 38 is adjusted. When the hot water tap 32 is opened, high-temperature hot water flows. To avoid this, water from the mixing circuit 35 is bypassed to the hot-water pipe 18 so that hot water of a desired temperature can be discharged. That is, any type of valve can be used as the hot water tap 32, and a hot water tap other than the mixing valve may be used.

In the above embodiment, the flow control device is a water amount control valve. However, the same effect can be obtained by providing a plurality of mixing circuits and a plurality of solenoid valves, and adjusting the amount of bypass water by the number of opening and closing of the solenoid valves. Can get.

(Embodiment 5) FIG. 6 is a structural view showing a laminated heat exchanger according to Embodiment 5 of the present invention. In the fifth embodiment,
The difference from the first embodiment is that the first forced convection type heat exchanger is constituted by a laminated heat exchanger. The plates of the stacked heat exchanger have first circulation circuit inlet 39 and outlet 40,
A holding plate 43 provided with a second circulation circuit inlet 41 and an outlet 42, a plate A44 having the first circulation circuit 19 cut off, a plate B45 as a partition, and a second circulation circuit 26 being cut off. There is a plate C46 that has been installed. Furthermore, through holes 47 and 48 are formed to form the header of each circuit when the plates are stacked and integrated.

The plate 45 used for heat exchange is provided with through holes 49 and 50 which form the header of each circulation circuit when the plates are stacked and integrated.

Further, the plate C46 is located at a position facing the flow path 51 of the plate A44 via the plate B45.
Are provided.

These plates A44 and B4
5, plate C46 and plate B45 are stacked in this order to obtain 1
By making a set, and further stacking and integrating multiple sets,
A stacked heat exchanger is formed.

The components having the same reference numerals as in the first embodiment have the same structure, and the description will be omitted. Next, the operation and function will be described. During the heating operation, high-temperature hot water circulates in the first circulation circuit 19. At this time, the first circulation circuit inlet 39
Warm water that has entered through the through hole 47 flows through the flow path 51 of the plate A44 and exits from the first circulation circuit outlet 40. On the other hand, the flow path 52 of the opposing plate C46 is supplied with heat for heating by transferring heat to the hot water of the second circulation circuit 26 via the plate B45. By using the stacked heat exchanger in this way, a compact and efficient forced convection type heat exchanger can be realized, so that the apparatus can be downsized.

As a method for integrally joining the plates, for example, diffusion welding or brazing is used. Diffusion welding is a process in which the temperature is raised to a temperature slightly lower than the melting point of the base material of the plate in a vacuum and pressure is applied, and is integrated by diffusion of the plate material. For brazing, a brazing material having a lower melting point than the base material of the plate is attached to all joining surfaces, the temperature is raised to the melting point of the brazing material in a vacuum or an inert atmosphere, and only the brazing material is melted and integrated. Things.

(Embodiment 6) FIGS. 7 and 8 are structural views showing a laminated heat exchanger and a filter according to Embodiment 6 of the present invention. The sixth embodiment is different from the first embodiment or the fifth embodiment in that the second forced convection heat exchanger is constituted by a laminated heat exchanger, and is provided on the inlet side of the third circulation circuit of the laminated heat exchanger. The point is that a filter is provided. The plates of the stacked heat exchanger
A holding plate 43 provided with a first circulation circuit inlet 39 and an outlet 40 and a third circulation circuit inlet 53 and an outlet 54
And the plate A44 from which the first circulation circuit 19 is cut.
And a plate B45 serving as a partition, and a third circulation circuit 30
There is a plate D55 that is cut off. Further, when the respective plates are stacked and integrated, a through hole 47 and a through hole 48 which form a header portion of each circulation circuit are provided. The plate B45 used for heat exchange is provided with a through hole 49 and a through hole 50 that form a header portion of each circulation circuit when the respective plates are stacked and integrated. Further, the plate A4 is connected via the plate B45.
The channel 56 of the plate D55 is provided at a position facing the fourth channel 51. The plate A44, the plate B45, the plate D55, and the plate B45 are sequentially stacked to form one set, and a plurality of sets are stacked and integrated to form a stacked heat exchanger.

Further, a detachable filter 57 is provided in front of the third circulation circuit inlet 53.

The components having the same reference numerals as in the first embodiment have the same structure, and a description thereof will be omitted. Next, the operation and action will be described. During the reheating operation of the bath, high-temperature hot water circulates in the first circulation circuit 19. At this time, the warm water entering from the first circulation circuit inlet 39 flows through the flow path 51 from the through hole 47 and exits from the exit 40 of the first circulation circuit. On the other hand, heat is transferred to the hot water in the bathtub 29 of the third circulation circuit 30 via the plate B45, and heat for reheating the bath is supplied to the channel 56 of the opposing plate D55. By using the stacked heat exchanger in this way, a compact and efficient forced convection type heat exchanger can be realized, so that the apparatus can be downsized.

The bathtub 29 is further provided with a removable filter 57.
It is possible to secure stable thermal efficiency by trapping garbage such as hair and scales circulating from the filter and not entering the flow path 56 of the laminated heat exchanger, and to prevent heat clogging by replacing the filter. An increase in pressure loss of the circulation circuit 30 can also be prevented.

[0054]

As described above, the combustion apparatus according to the first aspect of the present invention is a combination of a hot water supply / bath apparatus having a hot water supply and a bath reheating function or a hot water supply / room heater having a hot water supply and a heating function. The water heater can be reduced in size, and the heat exchange efficiency is high due to the forced convection type heat exchanger, and the heat loss can be minimized because the route for circulating hot water is short. In addition, by operating the conveying means and the burner in conjunction with the operation of the circulation pump for the second circulation circuit by the operation of the load device, there is an effect of improving the durability without generating any empty heating of the heat exchanger.

In the combustion apparatus according to the second aspect of the present invention, it is possible to reduce the size of a combined water heater such as a water heater and a hot water heater having a bath reheating function and a heating function, and to circulate through the first circulation circuit. The first hot convection type heat exchanger exchanges heat with the high-temperature hot water and supplies the high-temperature hot water to the necessary heating device, thereby exhibiting an effect of exhibiting a sufficient heating capacity. In addition, hot water circulating in the first circulation circuit whose heat has been deprived by the heating device is supplied to the second forced convection type heat exchanger for bath reheating, which requires some low temperature hot water. Therefore, operation control can be easily realized.

Further, since the combustion apparatus according to the third aspect is provided with a plurality of second forced convection type heat exchangers, there is an effect that a plurality of bathtubs can be reheated.

Further, in the combustion device according to the fourth aspect, since the hot water in the bathtub is naturally circulated, the circulation pump for the third circulation circuit can be omitted, so that the device can be reduced in size and weight.

In the combustion apparatus according to the fifth aspect, even when hot water is supplied during a bath reheating operation or a heating operation, the water in the water supply pipe is supplied to the high-temperature water in the circulation circuit. By bypassing water from the mixing circuit, there is an effect that hot water can be discharged at a desired hot water temperature. That is, hot water at an appropriate temperature can be supplied without using a mixing valve for the hot water tap.

Further, in the combustion apparatus according to claim 6, since the first forced convection type heat exchanger for heating is a stacked type heat exchanger, it is not only a shell tube type heat exchanger but also a double tube type heat exchanger. There is an effect that the size can be reduced as compared with an exchanger or a plate heat exchanger.

Further, in the combustion apparatus according to claim 7, the second forced convection type heat exchanger for reheating is a stacked type heat exchanger, so that not only the shell tube type heat exchanger but also the double tube type heat exchanger is used. It can be smaller than heat exchangers and plate heat exchangers, and it can trap dirt such as hair and scales circulating from the bathtub with a filter, preventing the blockage of the flow path of the laminated heat exchanger and ensuring stable heat exchange efficiency. There is an effect that can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a combustion device according to a first embodiment of the present invention.

FIG. 2A is a configuration diagram of a hot water supply / room heating device according to the first embodiment. FIG. 2B is a configuration diagram of a hot water supply bath device according to the first embodiment.

FIG. 3 is a configuration diagram of a combustion device according to a second embodiment of the present invention.

FIG. 4 is an enlarged configuration diagram of a double tube heat exchanger according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a combustion device according to a fourth embodiment of the present invention.

FIG. 6 is an exploded perspective view of a laminated heat exchanger according to a fifth embodiment of the present invention.

FIG. 7 is an exploded perspective view of a laminated heat exchanger according to Embodiment 5 of the present invention.

FIG. 8 is a configuration diagram of a filter according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional combustion device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 13 Burner 14 Heat exchanger 15 Inlet 16 Water supply pipe 17 Outlet 18 Hot water supply pipe 19 First circulation circuit 20 Conveying means 23 First double pipe heat exchanger (first forced convection heat exchanger) 24 Second Double tube heat exchanger (second forced convection heat exchanger) 25 Heating device (load device) 26 Second circulation circuit 27 Circulation pump for second circulation circuit 29 Bathtub (load device) 30 Third circulation circuit 31 Circulating Pump for Third Circulation Circuit 35 Mixing Circuit 38 Flow Control Device 44 Plate A 45 Plate B 46 Plate C 55 Plate D 57 Filter

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

Claims (7)

[Claims] 1. A burner, a heat exchanger heated by the burner, a water supply pipe provided at an inlet of the heat exchanger, a hot water supply pipe provided at an outlet, and a closed circuit formed at the inlet and the outlet. A first circulation circuit, and a conveying means for circulating hot water in the first circulation circuit, a forced convection heat exchanger, and a load device utilizing heat obtained by the forced convection heat exchanger. A second circulation circuit that forms a circulation circuit between the forced convection heat exchanger and the load device, a second circulation circuit circulation pump that circulates hot water in the second circulation circuit, and the load. A combustion device for operating the transfer means and the burner in conjunction with the operation of the circulation pump for the second circulation circuit when operating the device. 2. A forced convection type heat exchanger comprises a first forced convection type heat exchanger provided on the upstream side of the first circulation circuit and a second forced convection type heat exchanger provided on the downstream side. Yes, the load device has a heating device for performing heating, a second circulation circuit is provided between the first forced convection heat exchanger and the heating device, the second circulation A second circulation circuit circulation pump for circulating hot water in the circuit is provided, a third circulation circuit is provided between the second forced convection heat exchanger and the bathtub, and the third circulation circuit The combustion device according to claim 1, further comprising a circulation pump for a third circulation circuit for circulating bath water. 3. A plurality of second forced convection type heat exchangers provided in the first circulation circuit, and a plurality of second forced convection type heat exchangers provided between the plurality of second forced convection type heat exchangers and the plurality of bathtubs. The combustion device according to claim 1, further comprising a third circulation circuit, and a plurality of third circulation circuit circulation pumps for circulating hot water in the plurality of third circulation circuits. 4. A method according to claim 1, wherein the second forced convection type heat exchanger is a double-pipe heat exchanger, and the double-pipe heat exchanger is inclined so that bath water in the third circulation circuit is naturally circulated. Item 3. The combustion device according to Item 2. 5. The combustion apparatus according to claim 1, further comprising: a mixing circuit that bypasses a water supply pipe and a hot water supply pipe of the heat exchanger; and a flow control device that controls a flow rate of water flowing through the mixing circuit. 6. A first forced convection type heat exchanger comprises a plate A having a slit formed in a flow path of a first circulation circuit, a plate B serving as a partition, and a flow path of the first circulation circuit. 2. The combustion device according to claim 1, wherein a plurality of sets of a plate C having a slit-shaped flow path of the second circulation circuit at a position opposed to the plate C are laminated and integrated. 7. The second forced convection type heat exchanger includes a plate A having a slit formed in the flow path of the first circulation circuit, a plate B serving as a partition, and a flow path of the first circulation circuit. A plate D in which a flow path of a third circulation circuit is formed in a slit shape at a position facing the third heat exchanger, and a laminated heat exchanger having a structure in which a plurality of sets of the plates are laminated and integrated, and the second one of the laminated heat exchanger 2. The combustion device according to claim 1, further comprising a filter removably provided on an inlet side of the three circulation circuits.