JP2007107822A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater capable of providing hot water supply, heating and bathing by a single heat source by combining a heat exchanger for hot water supply and a heat exchanger for latent heat recovery, reducing a size and a weight of an apparatus, and improving efficiency. <P>SOLUTION: This one-can multiple-water channel water heater is composed of a hot water supply circulation circuit 19, use-side heat exchangers 18, 27 and a hot water supply circuit 3. Here, a drain connection opening 39 for for connecting dew condensation water generated in the heat exchanger 18 for latent heat recovery to a draining port outside of a machine after neutralizing the dew condensation water by a neutralizing device 38, and an over pressure relief valve 35 for relieving a pressure of the hot water supply circulation circuit 19 to the drain connection opening 39, are mounted, and further a control means 36 is mounted to open the over pressure relief solenoid valve 35 when the use-side heat exchangers 18, 27 are used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water supply device for a single can multi-channel that circulates hot water supplied through a hot water supply heat exchanger heated by combustion heat of a burner and supplies heat to a plurality of loads.

Conventionally, as this type of combustion apparatus, as disclosed in Patent Document 1, a hot water supply heat exchanger that heats water supplied through a water supply path by combustion of a burner to supply hot water to the hot water supply path, and heating supplied through an inlet path A hot water supply apparatus provided with a fluid heat exchanger that heats a target fluid by combustion of the burner and flows out to an outlet, and the hot water heat exchanger recovers sensible heat of combustion exhaust gas of the burner A sensible heat exchanger for hot water supply, and a sensible heat exchanger for hot water supply, which is arranged downstream of the sensible heat exchanger for hot water supply in the flow direction of the combustion exhaust gas of the burner and recovers the latent heat of the combustion exhaust gas of the burner The fluid heat exchanger recovers sensible heat of the combustion exhaust gas of the burner, and the combustion exhaust gas of the burner than the fluid sensible heat exchange unit. Arranged downstream of the flow direction of And a fluid latent heat exchange part for recovering the latent heat of the combustion exhaust gas of the burner, and the sensible heat exchange part for hot water supply and the sensible heat exchange part for fluid are integrated in a state of conducting heat to each other. And a hot water supply device in which the latent heat heat exchange part for hot water supply and the latent heat heat exchange part for fluid are integrally formed in a state of conducting heat to each other are disclosed (for example, see Patent Document 1). .
JP 2002-267262 A

  However, since the conventional hot water supply apparatus forms two paths for hot water supply and fluid as the paths heated by the burner, the piping configuration becomes complicated and the heat exchange on the shutdown side during single operation It had the subject that the boiling of the residual water in a container generate | occur | produced.

  In addition, a hot water supply heat exchanger and a fluid heat exchanger are respectively disposed in the burner combustion gas outflow path, and the hot water supply heat exchanger is provided with a sensible heat exchange unit for hot water supply and a latent heat exchange unit for hot water supply. The fluid heat exchanger is provided with a sensible heat exchange section for fluid and a latent heat exchange section for fluid, so that the sensible heat exchange section and the latent heat exchange section respectively have a hot water supply heat exchanger and a fluid It is necessary to integrally form the heat exchanger, and the heat exchanger for hot water supply and the heat exchanger for fluid are forced to have extremely complicated configurations. In particular, when the structure of the latent heat exchange section is a double pipe structure using a stainless steel pipe and a copper pipe in order to improve the corrosion resistance, there is a problem in workability.

  Further, although not disclosed in the above conventional example, in a configuration in which hot water heated by a burner is circulated and heat is supplied to a plurality of utilization circuits using the circulating water, the utilization side heat exchanger When there is an operation request, the burner starts to burn and the hot water heat exchanger is heated, so that the hot water circulation circuit becomes high pressure and the expanded water is supplied from the first overpressure relief valve provided at the hot water connection port. It had the subject of dripping always.

The present invention solves the above-mentioned conventional problems, and forms one heating path with a hot water supply heat exchanger and a latent heat recovery heat exchanger, and uses circulating water in the heating path to form a heating circuit or a bath circuit. By adopting a structure for supplying heat, it is possible to configure a use-side heat exchanger that is not related to the heat exchanger for hot water supply and the latent heat recovery heat exchanger. It is possible to provide a hot water supply device that is easy to use and prioritizes hot water supply performance by realizing a reduction in weight and weight and making the heating path mainly a hot water supply circuit. It is another object of the present invention to provide a hot water supply apparatus that is improved in safety and durability by reducing an increase in the internal pressure of an apparatus in one heating path configuration mainly including a hot water supply circuit and prevents dripping of expanded water to the outside of the apparatus. .

  In order to solve the above-described conventional problems, the hot water supply apparatus of the present invention heats the water supplied from the water supply path by combustion of the burner and supplies it to the hot water supply path via the latent heat recovery heat exchanger and the hot water supply heat exchanger. In addition, a hot water supply circulation circuit is formed by returning it to the hot water supply heat exchanger again through a hot water supply circulation pump, and a circuit for supplying heat to the load side by disposing a use side heat exchanger in the hot water supply circulation circuit. And a hot water supply device for a single can multi-channel that forms a hot water supply circuit for bath pouring that branches off from a hot water supply circulation circuit via the use side heat exchanger and supplies hot water to a currant or a bath circuit, After neutralizing the condensed water generated in the latent heat recovery heat exchanger, a drain connection port connected to a drain port outside the machine and an overpressure relief solenoid valve for releasing the pressure of the hot water circulation circuit to the drain connection port are provided. The use side heat exchanger is used Can, is provided with a control means for the overpressure relief is to open the solenoid valve.

  Thereby, one heating path is formed by the heat exchanger for hot water supply and the heat exchanger for latent heat recovery, and the heat amount is supplied to the heating circuit and the bath circuit using the circulating water of the heating path. Enables the configuration of the use side heat exchanger that is not related to the hot water supply heat exchanger or the latent heat recovery heat exchanger. By using a hot water supply circuit as a main route, it is possible to provide an easy-to-use hot water supply device that prioritizes hot water supply performance, and safety by reducing the increase in the internal pressure of the equipment in one heating route configuration mainly consisting of a hot water supply circuit, It is possible to provide a hot water supply device that improves durability and prevents dripping of expansion water to the outside of the device.

  The hot water supply apparatus of the present invention has a structure in which one heating path is formed by a hot water supply heat exchanger and a latent heat recovery heat exchanger, and an overpressure relief solenoid valve is opened when the use side heat exchanger is used. This makes it possible to configure the use-side heat exchanger not related to the hot water supply heat exchanger or latent heat recovery heat exchanger, and to reduce the size and weight of the equipment by simplifying the main body configuration including the piping configuration. As well as realizing the above, it is possible to provide an easy-to-use hot water supply apparatus that prioritizes hot water supply performance by mainly using a hot water supply circuit as the heating path, and to improve safety and durability by reducing the rise in internal pressure of the equipment and equipment. It is possible to provide a hot water supply device that prevents dripping of expansion water to the outside.

  1st invention heats the water supplied from a water supply path by combustion of a burner, supplies it to a hot water supply path via a heat exchanger for latent heat recovery and a heat exchanger for hot water supply, and again through the hot water supply circulation pump A hot water supply circulation circuit is formed by returning to the hot water supply heat exchanger, and a use side heat exchanger is provided in the hot water supply circulation circuit to form a circuit for supplying heat to the load side, and the use side heat exchanger Is a hot water supply device for a single can multi-channel that forms a hot water supply circuit for bath pouring that branches off from a hot water supply circulation circuit that passes through the hot water supply to a currant or bath circuit, and the dew condensation water generated in the latent heat recovery heat exchanger After the neutralization treatment, a drainage connection port connected to a drainage port outside the machine and an overpressure relief solenoid valve that releases the pressure of the hot water supply circulation circuit to the drainage connection port are provided, and the use side heat exchanger is used. When the overpressure relief solenoid valve is opened. It is characterized in that a means.

And since one heating path is formed by the heat exchanger for hot water supply and the heat exchanger for latent heat recovery, and the amount of heat is supplied to the heating circuit or bath circuit using the circulating water of the heating path, the hot water supply It is possible to configure a heat exchanger on the use side that is not related to a heat exchanger for heat recovery or a heat exchanger for latent heat recovery. By using a hot water supply circuit as a main component, it is possible to provide an easy-to-use hot water supply device that prioritizes hot water supply performance, and safety and durability by reducing the increase in equipment internal pressure in one heating path configuration mainly consisting of a hot water supply circuit It is possible to provide a hot water supply device that improves the performance and prevents the expansion water from dripping to the outside of the device.

  The second invention is characterized in that a second overpressure relief valve that opens at a predetermined pressure is provided downstream of the overpressure relief solenoid valve. Provides a water heater that prevents dripping of expansion water from the first overpressure relief valve to the outside of the equipment by setting it lower than the opening pressure of the first overpressure relief valve provided at the hot water supply connection port can do.

  3rd invention is used as a heat exchanger for a heating which supplies a calorie | heat amount to the heating circuit which has a heating apparatus which performs heating, bathroom drying, etc. as a utilization side heat exchanger, Hot water supply or independent use of heating, or hot water supply and heating Hot water supply device configured to perform hot water supply and heating using a hot water circulation circuit composed of a hot water supply heat exchanger and a latent heat recovery heat exchanger. By configuring the hot water supply and heating with a single heating path, the main body structure including the piping structure can be simplified to reduce the size and weight of the appliance, and to improve the efficiency by collecting latent heat. Therefore, hot water supply performance and heating performance can be secured at the same time.

  4th invention is used as a heat exchanger for a bath which supplies a heat quantity to a bath circuit which performs reheating of a bath as a use side heat exchanger, and uses hot water or bath reheating alone, or hot water and reheating of a bath. Hot water supply that is configured to perform hot water supply and bath replenishment using a hot water circulation circuit consisting of a hot water supply heat exchanger and a latent heat recovery heat exchanger. The system is limited to equipment, and hot water supply and bath chase are configured with a single heating path, which reduces the size and weight of the equipment by simplifying the main body configuration including the piping configuration, and improves the efficiency by collecting latent heat. By improving the temperature, it is possible to ensure both hot water supply performance and bathing performance.

  The fifth aspect of the invention provides a heating heat exchanger that supplies heat to a heating circuit having a heating device that performs heating, bathroom drying, and the like as a use-side heat exchanger, and supplies heat to a bath circuit that retreats the bath A heat exchanger for bath is provided, and it is possible to select a single use of hot water supply or heating or bath reheating, or at least two simultaneous use of hot water supply and heating and reheating bath, It is limited to hot water supply devices that are configured to perform hot water supply, heating, and bath reheating using a hot water supply circulation circuit that consists of a heat exchanger for hot water supply and a heat exchanger for recovering latent heat. By using a single heating path, it is possible to reduce the size and weight of the equipment by simplifying the main body structure including the piping structure, and to improve the efficiency by recovering latent heat, thereby improving hot water supply performance, heating performance, and wind. Reheating performance can be secured simultaneously.

  In the sixth aspect of the present invention, when a plurality of use-side heat exchangers are provided, the heat exchangers are connected in parallel to the hot water supply circulation circuit so that the hot water temperatures supplied from the hot water supply heat exchangers are substantially the same. A hot water supply circulation circuit by connecting a plurality of use side heat exchangers in parallel to a hot water supply circulation circuit composed of a hot water supply heat exchanger and a latent heat recovery heat exchanger. Therefore, the circulation pump can be made smaller and lighter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 shows a structural diagram of a hot water supply apparatus according to a first embodiment of the present invention.

In FIG. 1, first, water supplied from a water supply channel 1 is heated by combustion of a burner 2 and rises to a predetermined temperature, and then supplied to a tapping channel, and is a primary heat exchanger 18 for heating that is a use side heat exchanger. After passing through the side path, the hot water supply circulation circuit 19 is formed by joining again to the water supply path 1 via the circulation pump 17. Then, a hot water supply path 3 is formed by branching from the hot water supply circulation circuit 19 after passing through the heating heat exchanger 18, and from the water supply path 1 from the bypass passage 4 formed by connecting the hot water supply path 3 and the water supply path 1. By supplying a part of the supplied water through the bypass control valve 5, the hot water is adjusted to a desired hot water and discharged from the hot water tap 6.
In addition, as the pouring circuit 32 for filling the bathtub 31 with water, a path communicating from the hot water supply path 3 on the downstream side of the bypass passage 4 to the bath circuit 28 is formed.

  Here, the burner 2 is supplied with fuel from a gas supply passage 10 provided with a gas source solenoid valve 7, a gas proportional valve 8, and a gas switching valve 9, and supplied with combustion air from a combustion fan 11, in advance. A combustion operation is performed according to a predetermined sequence. Then, the combustion gas generated by the combustion of the burner 2 passes through the combustion chamber 12, passes through the exhaust passage 13, and is discharged out of the instrument from the exhaust port 14.

  A hot water supply heat exchanger 15 that recovers sensible heat of the combustion gas and a latent heat recovery heat exchanger 16 that recovers the latent heat of the combustion exhaust gas are disposed in the exhaust path of the combustion gas. Specifically, a hot water supply heat exchanger 15 is provided in the downstream combustion chamber 12 of the burner 2, a latent heat recovery heat exchanger 16 is provided in the downstream exhaust passage 13, and water supplied from the water supply passage 1 is supplied. First, the heat is supplied to the latent heat recovery heat exchanger 16 to recover the latent heat in the combustion exhaust gas, and then supplied to the hot water supply heat exchanger 15 to be heated to a predetermined high temperature water by combustion of the burner 2 and supplied to the hot water outlet 3. . Thus, in addition to heat recovery by the conventional hot water supply heat exchanger 15, by providing the latent heat recovery heat exchanger 16 for recovering the latent heat of the combustion exhaust gas, the overall thermal efficiency is improved and energy saving is achieved.

  The heating circuit 20 is connected to a load such as a radiator 21 on the secondary side of the heating heat exchanger 18 to form a closed circuit, and is circulated by the heating circulation pump 22, whereby the heating heat exchanger 18. Thus, heat is exchanged with the high-temperature water supplied from the hot water supply circuit 19 so as to ensure the amount of heating heat.

About the combustion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, at the time of hot water supply operation, when the hot water tap 6 is opened, the water supply side flow rate sensor 23 disposed in the water supply passage 1 detects water flow, and the combustion fan 11 is operated by this water flow signal and simultaneously the gas source solenoid valve 7, The gas proportional valve 8 is opened, fuel and combustion air are supplied to the burner 2, and combustion is started by an ignition operation. Combustion gas generated by the start of combustion of the burner 2 is discharged from the exhaust port 14 via the exhaust passage 13 from the combustion chamber 12. In the process of exhausting the combustion gas, the water supplied from the water supply passage 1 is heated by the hot water supply heat exchanger 15 disposed in the combustion chamber 12 and the latent heat recovery heat exchanger 16 disposed in the exhaust passage 13. .

  Hot water heated by the hot water supply heat exchanger 15 passes through a bypass passage 4 provided in communication between the water supply passage 1 and the hot water supply passage 3 so as to bypass the hot water supply heat exchanger 15 and the latent heat recovery heat exchanger 16. The bypass control valve 5 is mixed with the water on the incoming side. The opening of the bypass control valve 5 is adjusted by a signal from the hot water thermistor 25 so that the mixed hot water reaches a hot water supply set temperature set by the remote control remote controller 24, and hot water is supplied from the hot water tap 6 through the hot water connection port 26. .

  Thus, when selecting the hot water supply independent operation, the hot water set automatically can be secured by setting a desired temperature with the remote control remote controller 24 and opening the hot water tap 6.

  Next, at the time of automatic hot water filling operation, a desired flow rate is set by the remote control remote controller 24, the hot water solenoid valve 33 provided in the hot water circuit 32 is opened, and hot water is poured from the bath circuit 28 to the bathtub 31.

Next, at the time of heating operation, the heating circulation pump 22 provided in the heating circuit 20 is driven by an operation command of a controller (not shown) built in the heating terminal device such as the radiator 21, and the operation command is linked. Then, the circulation pump 17 for circulating the hot water in the hot water supply circulation circuit 19 is driven, and at the same time, combustion is started by the ignition operation of the burner 2. Combustion gas generated by the start of combustion of the burner 2 is discharged from the exhaust port 14 via the exhaust passage 13 from the combustion chamber 12. In the process of exhausting the combustion gas, the water supplied from the water supply passage 1 is heated by the hot water supply heat exchanger 15 disposed in the combustion chamber 12 and the latent heat recovery heat exchanger 16 disposed in the exhaust passage 13. .

  Hot water heated by the hot water supply heat exchanger 15 circulates in the hot water supply circulation circuit 19 through the primary side path of the heating heat exchanger 18 by the circulation pump 17, and heat is exchanged by the water-water heat exchange configuration for heating. Heat is transferred to the circuit 20. Heat of the heating circuit 20 received by the heating heat exchanger 18 is radiated as warm air by the radiator 21. And the high temperature water heat-exchanged with the heat exchanger 18 for heating returns to the upstream water supply path 1 of the heat exchanger 16 for latent heat collection | recovery, forms the hot-water supply circulation circuit 19, and issues the heating operation command from the radiator 21 While it is being circulated, it is maintained at a predetermined hot water temperature and continues to circulate.

  In this way, the hot water supply path 3 is branched from the hot water supply circulation circuit 19 after passing through the heating heat exchanger 18 that is a use side heat exchanger, thereby securing high-temperature water necessary for the heating operation. The hot water supply priority operation that can adjust and supply hot water in a wide range from high temperature water to low temperature water to the hot water supply circuit can be ensured.

The latent heat recovery heat exchanger 16 that recovers the latent heat of the combustion exhaust gas is positioned downstream of the hot water supply heat exchanger 15 with respect to the exhaust gas path, and upstream of the hot water supply heat exchanger 15 with respect to the water supply path. The hot water remaining in the latent heat recovery heat exchanger 16 is heated by the hot water supply heat exchanger 15. As a result, the amount of heat generated by the combustion of the burner 2 can be efficiently exchanged, leading to energy saving.
Here, during the conventional heating operation, the hot water supply heat exchanger 15 is heated by the burner 2, so that the entire hot water supply circulation circuit 19 becomes high pressure, and from the first overpressure relief valve 34 provided at the hot water supply connection port 26. In the present invention, the condensed water generated in the latent heat recovery heat exchanger 18 is neutralized by the neutralizing device 38 and then connected to a drain outlet outside the apparatus. An overpressure relief solenoid valve 35 for releasing the pressure of the drainage connection port 39 and the hot water supply circulation circuit 19 to the drainage connection port 39 is provided. When the use side heat exchanger is used, the overpressure relief solenoid valve 35 is Since the control means 36 that opens the valve is provided, it is possible to provide a hot water supply device that is improved in safety and durability by reducing the increase in the internal pressure of the device and prevents the expansion water from dripping to the outside of the device.
In other words, it solves a specific problem caused by the configuration of a single can multi-channel, and is configured to operate a hot water supply circuit and a user-side circuit using a common hot-water supply channel. When using, the control means for opening the overpressure relief solenoid valve is provided, so that the rise in the internal pressure of the device can be reduced and the expansion of expansion water to the outside of the device can be prevented.

  Further, as shown in FIG. 2, the latent heat recovery heat exchanger 16 has a side plate 16a, 16b made of stainless steel, a plate fin 16c made of stainless steel arranged between the side plates 16a, 16b, Stainless steel sheath pipes 16d that are arranged side by side through openings provided in the side plates 16a and 16b and the plate fins 16c, and a plurality of copper pipes that are internally passed through the sheath pipe 16d and are provided with a water inlet 16e and a water outlet 16f. A water inlet pipe 16g, a water inlet header 16h that gathers the water inlet 16e of the water pipe 16g to form one water inlet path, and a water outlet header that gathers the water outlet 16f of the water pipe 16g to form a water inlet path. 16i, and the water pipe 16g has a double pipe structure in the exhaust gas path, and the heat exchange path in parallel through the water inlet header 16h and the water outlet header 16i. And so as to form a.

  With this configuration, the water supplied from the water supply channel 1 flows in parallel through the plurality of water pipes 16g from the water inlet header 16h, gathers at the water outlet header 16i, and is supplied to the hot water supply heat exchanger 15. And since the inside of the exhaust gas path covers the water conduit 16g with a stainless steel sheath tube 16d, the problem of corrosion due to condensed water is also suppressed, and the heat efficiency can be improved by recovering the latent heat in the combustion exhaust gas. it can.

  Further, by collecting the water inlet 16e and the water outlet 16f of the water pipe 16g with the water inlet header 16h and the water outlet header 16i, the latent heat recovery heat exchanger 16 can be passed through a plurality of water passages, The passage resistance of the hot water supply circulation circuit 19 can be reduced, and the circulation pump 17 can be reduced in size and weight. Furthermore, the arrangement of the water pipe 16g is simplified by simplifying the arrangement structure of the water pipe 16g by gathering on one side of the water pipe 16g to form the water inlet path and the water outlet path.

  As described above, in the present embodiment, one heating path is formed by the hot water supply heat exchanger 15 and the latent heat recovery heat exchanger 16, and the use side load circuit utilizes the circulating water of the heating path. Since the heat amount is supplied to the heating circuit 20, it is possible to configure the heating heat exchanger 18 that is a use side heat exchanger not related to the hot water supply heat exchanger 15 and the latent heat recovery heat exchanger 16. The simplification of the main body configuration including the piping configuration can reduce the size and weight of the appliance, and can provide an easy-to-use hot water supply device that prioritizes the hot water supply performance by mainly using the hot water supply circuit as the heating path. In addition, by adopting a single heating path configuration mainly composed of a hot water supply circuit, the problem of residual water boiling in the heat exchanger at the time of single operation is solved, and a water drop phenomenon in the hot water supply circuit 19 is caused by water interruption or the like. Occurred In addition, it is possible to provide a hot water supply apparatus that can prevent an empty-burning operation in a combination, improve safety, and further facilitate the configuration for improving the corrosion resistance of the heat exchanger 16 for recovering latent heat, thereby achieving high efficiency. Therefore, it is possible to provide a hot water supply device that reduces the running cost.

(Embodiment 2)
FIG. 3 shows a structural diagram of a hot water supply apparatus according to the second embodiment of the present invention.

  In the present embodiment, a second overpressure relief valve that opens at a predetermined pressure is provided downstream of the overpressure relief solenoid valve of the hot water supply apparatus in the first embodiment. In addition, the thing of the same code | symbol as 1st Embodiment has the same structure, and abbreviate | omits description.

  A second overpressure relief valve 37 that opens at a predetermined pressure is provided on the downstream side of the overpressure relief solenoid valve 35. Even if the overpressure relief solenoid valve 35 is opened, the expansion water is always supplied to the drain connection port 39. The wastewater is prevented from being wasted because the valve is opened at a predetermined pressure instead of draining from the machine to the drain outlet outside the machine.

  Further, by setting the pressure lower than the opening pressure of the first overpressure relief valve 34 provided at the hot water supply connection port 26, it is possible to prevent dripping of the expansion water from the first overpressure relief valve to the outside of the device. it can.

(Embodiment 3)
FIG. 4 shows a structural diagram of a hot water supply apparatus according to the fourth embodiment of the present invention.

  This embodiment relates to a hot water supply apparatus using a bath heat exchanger that supplies heat to a bath circuit that performs reheating of the bath as a use-side heat exchanger of the hot water supply apparatus in the first embodiment. . In addition, the thing of the same code | symbol as 1st Embodiment has the same structure, and abbreviate | omits description.

  The bath heat exchanger 27 is connected to the hot water supply circulation circuit 19, and heat exchange is performed while circulating the high-temperature water heated by the latent heat recovery heat exchanger 16 and the hot water supply heat exchanger 15 through the circulation pump 17 to the bath circuit 28. Supply heat. The bath circuit 28 replenishes the bath water by supplying the hot water in the bath 31 to the bath heat exchanger 27 through the bath circulation pump 29 and the water amount detection unit 30 and circulating it for a predetermined time. In addition, as the pouring circuit 32 for filling the bathtub 31 with water, a path communicating from the hot water supply path 3 on the downstream side of the bypass passage 4 to the bath circuit 28 is formed.

Next, the operation and action will be described. When bath operation is instructed by the remote control remote controller 24 during bath operation, the bath circulation pump 29 provided in the bath circuit 28 is driven and the water flow detection unit 30 performs bath water. When the circulation is detected, the circulation pump 17 that circulates the hot water in the hot water supply circulation circuit 19 is driven by the detection signal, and at the same time, combustion is started by the ignition operation of the burner 2.

  Combustion gas generated by the start of combustion of the burner 2 is discharged from the exhaust port 14 via the exhaust passage 13 from the combustion chamber 12. In the process of exhausting the combustion gas, the water supplied from the water supply passage 1 is heated by the hot water supply heat exchanger 15 disposed in the combustion chamber 12 and the latent heat recovery heat exchanger 16 disposed in the exhaust passage 13. .

  Hot water heated by the hot water supply heat exchanger 15 is supplied to the bath heat exchanger 27 by the circulation pump 17, and heat is exchanged by the water-water heat exchange configuration and is transferred to the bath circuit 28. The heat of the bath circuit 28 received by the bath heat exchanger 27 raises the hot water temperature of the bathtub 31 to ensure a predetermined hot water temperature. Then, the high-temperature water heat-exchanged by the bath heat exchanger 27 is returned to the upstream water supply channel 1 of the latent heat recovery heat exchanger 16 to form a hot water supply circulation circuit 19, and a predetermined set by the remote-control remote controller 24. The circulation is continued at a predetermined hot water temperature until the reheating condition is satisfied.

  As described above, the hot water supply path 3 is branched from the hot water supply circulation circuit 19 after passing through the bath heat exchanger 27 which is a use side heat exchanger, thereby securing high-temperature water necessary for the bath reheating operation. However, it is possible to ensure hot water supply priority operation capable of adjusting and supplying a wide range of hot water from high temperature water to low temperature water to the hot water supply circuit.

The latent heat recovery heat exchanger 16 that recovers the latent heat of the combustion exhaust gas is positioned downstream of the hot water supply heat exchanger 15 with respect to the exhaust gas path, and upstream of the hot water supply heat exchanger 15 with respect to the water supply path. The hot water preheated by the latent heat recovery heat exchanger 16 is heated by the hot water supply heat exchanger 15. As a result, the amount of heat generated by the combustion of the burner 2 can be efficiently exchanged even during the bath chasing operation, leading to energy saving.
Here, during the conventional bath operation, the hot water supply heat exchanger 15 is heated by the burner 2, so that the entire hot water supply circulation circuit 19 becomes high pressure, and from the first overpressure relief valve 34 provided at the hot water supply connection port 26. In the present invention, the condensed water generated in the latent heat recovery heat exchanger 18 is neutralized by the neutralizing device 38 and then connected to a drain outlet outside the apparatus. An overpressure relief solenoid valve 35 for releasing the pressure of the drainage connection port 39 and the hot water supply circulation circuit 19 to the drainage connection port 39 is provided. When the use side heat exchanger is used, the overpressure relief solenoid valve 35 is Since the control means 36 that opens the valve is provided, it is possible to provide a hot water supply device that is improved in safety and durability by reducing the increase in the internal pressure of the device and prevents the expansion water from dripping to the outside of the device.
In other words, it solves a specific problem caused by the configuration of a single can multi-channel, and is configured to operate a hot water supply circuit and a user-side circuit using a common hot-water supply channel. When using, the control means for opening the overpressure relief solenoid valve is provided, so that the rise in the internal pressure of the device can be reduced and the expansion of expansion water to the outside of the device can be prevented.

  Further, by supplying hot water mixed in the hot water supply circuit 32 from the hot water supply passage 3 on the downstream side of the bypass passage 4, the hot water is efficiently heated by the latent heat recovery heat exchanger 16 and the hot water supply heat exchanger 15. After the hot water is mixed with the water supplied from the bypass passage 4 to secure the desired hot water, the hot water is supplied to the bath circuit 28 from the pouring circuit 32, thereby enabling an efficient bath operation.

  As described above, in the present embodiment, the hot water supply and the bath reheating are configured by one heating path, thereby realizing a reduction in the size and weight of the appliance by simplifying the main body configuration including the piping configuration, and latent heat. By improving efficiency through recovery, it is possible to ensure both hot water supply performance and bath retreat performance at the same time.

(Embodiment 4)
FIG. 5 shows a structural diagram of a hot water supply apparatus in the fifth embodiment of the present invention.

  This embodiment is a heating heat exchanger for supplying heat to a heating circuit having a radiator 21 that performs heating, bathroom drying, and the like as a use-side heat exchanger of the hot water supply apparatus in the first embodiment, and a bath The present invention relates to a hot water supply apparatus using a bath heat exchanger that supplies heat to a bath circuit that performs reheating. In addition, the thing of the same code | symbol as 1st Embodiment has the same structure, and abbreviate | omits description.

  The heat exchanger 18 for heating and the heat exchanger 27 for bath 27 are connected in parallel to the hot water supply circulation circuit 19, and the high-temperature water heated by the latent heat recovery heat exchanger 16 and the hot water supply heat exchanger 15 is circulated by the circulation pump 17. Then, heat is exchanged to supply heat to the heating circuit 20 or the bath circuit 28.

  Next, the operation and action will be described. During the heating operation, the heating pump 22 provided in the heating circuit 20 is driven by the operation command of the radiator 21, and the pump 17 that circulates the hot water in the hot water supply circulation circuit 19 in conjunction with it. The warm water heated by the hot water supply heat exchanger 15 that ignites the burner 2 by driving and collects the burned heat is heat-exchanged by the heating heat exchanger 18 and transferred to the heating circuit 20. Heat of the heating circuit 20 received by the heating heat exchanger 18 is radiated as warm air by the radiator 21.

  Further, during bath operation, when the bath circulation pump 29 provided in the bath circuit 28 is driven by the operation command of the remote control remote controller 24 and the circulation is detected by the water flow detection unit 30, the hot water supply circulation circuit 19 is interlocked. When the pump 17 that circulates the hot water is driven, the burner 2 is ignited, and the hot water heated by the hot water heat exchanger 15 that recovers the burned heat is heat-exchanged by the bath heat exchanger 27 and the bath circuit 28 Heat is transferred to. The heat of the bath circuit 28 received by the bath heat exchanger 27 is circulated to the bathtub 31 and reheated.

  Further, during heating and bath simultaneous operation, the heating circuits 20 and the pumps 22 and 29 of the bath circuit 28 are driven by the operation commands from the radiator 21 and the remote control remote controller 24, and combustion is started by the ignition operation of the burner 2. By this combustion, the circulating water in the hot water supply circuit 19 is heated by the latent heat recovery heat exchanger 16 and the hot water heat exchanger 15 and circulates while maintaining a predetermined high-temperature water state. This high-temperature circulating water is supplied to the heating heat exchanger 18 and the bath heat exchanger 27 at substantially the same temperature, and is transferred to the heating circuit 20 and the bath circuit 28.

  Also, simultaneous operation by combinations other than the above is possible, and the heat exchanger 18 for heating and the heat exchanger 27 for bath 27 are configured in parallel with the hot water supply circulation circuit 19, so that the passage resistance of the circulation circuit is reduced. Therefore, the circulation pump 17 can be reduced in size and weight.

  In this way, by using a configuration in which the hot water supply path 3 is branched from the hot water supply circulation circuit 19 after passing through the heating heat exchanger 18 and the bath heat exchanger 27 that are the use side heat exchangers, Hot water supply priority operation that can adjust and supply a wide range of hot water from high temperature water to low temperature water to the hot water supply circuit can be ensured while securing high temperature water necessary for operation.

The latent heat recovery heat exchanger 16 that recovers the latent heat of the combustion exhaust gas is positioned downstream of the hot water supply heat exchanger 15 with respect to the exhaust gas path, and upstream of the hot water supply heat exchanger 15 with respect to the water supply path. The hot water preheated by the latent heat recovery heat exchanger 16 is heated by the hot water supply heat exchanger 15. Thereby, the heat quantity generated by the combustion of the burner 2 can be efficiently exchanged even during operation of a plurality of usage-side loads, leading to energy saving.
Here, during the conventional heating operation or bath operation, the hot water supply heat exchanger 15 is heated by the burner 2, so that the entire hot water supply circulation circuit 19 becomes high pressure and the first overpressure provided at the hot water supply connection port 26. Although there has been a problem that the expansion water is always dripped from the relief valve 34, in the present invention, the condensed water generated in the heat exchanger 18 for latent heat recovery is neutralized by the neutralizing device 38, and then discharged outside the machine. When the use side heat exchanger is used, the overpressure relief is provided when a drainage connection port 39 connected to the outlet and an overpressure relief solenoid valve 35 for releasing the pressure of the hot water supply circulation circuit 19 to the drainage connection port 39 are provided. Since the control means 36 for opening the electromagnetic valve 35 is provided, it is possible to provide a hot water supply device that is improved in safety and durability due to a reduction in the increase in the internal pressure of the device and prevents the expansion water from dripping to the outside of the device. .
In other words, it solves a specific problem caused by the configuration of a single can multi-channel, and is configured to operate a hot water supply circuit and a user-side circuit using a common hot-water supply channel. When using, the control means for opening the overpressure relief solenoid valve is provided, so that the rise in the internal pressure of the device can be reduced and the expansion of expansion water to the outside of the device can be prevented.

  As described above, the hot water supply apparatus according to the present invention uses a hot water supply circulation circuit as a main circuit, hot water supply and heating, or hot water supply and bath, or hot water supply and heating and bath with a single circulation path as a heat source, and a use-side heat exchanger. The control means for opening the overpressure relief solenoid valve is provided when using the, reducing the internal pressure rise of the equipment, preventing dripping of expansion water outside the equipment, and reducing the size and weight of the equipment. It is possible to secure sufficient installation space, improve workability, and provide a latent heat recovery heat exchanger to achieve high efficiency and save energy by reducing running costs. It can also be applied to applications such as hot water bath equipment and hot water heaters.

Structure diagram of hot water supply apparatus in Embodiment 1 of the present invention Structure diagram of latent heat recovery heat exchanger of the hot water supply device Structure diagram of hot water supply apparatus in Embodiment 2 of the present invention Structure diagram of hot water supply apparatus in Embodiment 3 of the present invention Structure diagram of hot water supply apparatus in Embodiment 4 of the present invention

Explanation of symbols

1 Water supply path 2 Burner (heating means)
3 Hot water supply passage 13 Exhaust passage (exhaust heat passage)
DESCRIPTION OF SYMBOLS 15 Heat exchanger for hot water supply 16 Heat exchanger for latent heat recovery 17 Circulation pump for hot water supply 18 Heat exchanger for heating (use side heat exchanger)
DESCRIPTION OF SYMBOLS 19 Hot-water supply circulation circuit 20 Heating circuit 21 Radiator 22 Circulation pump 23 for heating 23 Water side flow sensor 27 Heat exchanger for baths (use side heat exchanger)
28 Bath Circuit 29 Bath Circulation Pump 31 Bathtub 33 Pouring Solenoid Valve 34 First Overpressure Relief Valve 35 Overpressure Relief Solenoid Valve 36 Control Unit 37 Second Overpressure Relief Valve 38 Neutralizer 39 Drainage Connection Port

Claims (6)

  The water supplied from the water supply passage is heated by combustion of the burner and supplied to the hot water supply passage through the latent heat recovery heat exchanger and the hot water supply heat exchanger, and again to the hot water supply heat exchanger through the hot water circulation pump. A hot water supply circulation circuit is formed by returning to the hot water supply circulation circuit, a user side heat exchanger is provided to form a circuit for supplying heat to the load side, and a hot water supply circulation circuit via the user side heat exchanger is formed. Is a one-can multi-channel hot water supply device that forms a hot water supply circuit for bath pouring that branches from the water supply to the currant or bath circuit, after neutralizing the condensed water generated in the latent heat recovery heat exchanger, A drainage connection port connected to a drainage port outside the machine and an overpressure relief solenoid valve for releasing the pressure of the hot water supply circulation circuit to the drainage connection port are provided, and the overpressure relief is used when the use side heat exchanger is used. Provided with control means to open the solenoid valve Hot water system.   The hot water supply apparatus according to claim 1, further comprising a second overpressure relief valve that opens at a predetermined pressure downstream of the overpressure relief solenoid valve.   Use as a heat exchanger for heating that supplies the amount of heat to a heating circuit that has a heating device that performs heating, bathroom drying, etc., as the use side heat exchanger, and selects either hot water supply or heating alone or simultaneous use of hot water and heating The hot water supply device according to claim 1 or 2, wherein the hot water supply device can be used.   As a use side heat exchanger, it can be used as a bath heat exchanger that supplies heat to the bath circuit that performs bath renewal, and can select either hot water supply or bath reheating alone, or simultaneous use of hot water and bath reheating The hot-water supply apparatus of Claim 1 or 2 which was made to do.   Heating heat exchanger for supplying heat to a heating circuit having a heating device that performs heating, bathroom drying, etc. as a use side heat exchanger, and a heat exchanger for bath that supplies heat to a bath circuit that retreats the bath The hot water supply apparatus according to claim 1 or 2, wherein a hot water supply or heating or bath reheating is used independently, or at least two simultaneous use of hot water supply, heating and bath reheating can be selected.   6. When providing a plurality of use-side heat exchangers, the respective heat exchangers are connected in parallel to the hot water supply circulation circuit so that the hot water temperatures supplied from the hot water heat exchanger are substantially the same. Water heater.

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