JP6858621B2 - Heat source device - Google Patents

Description

The present invention relates to a heat source device including a hot water storage tank and an auxiliary heat source device.

A heat source device including a hot water storage tank as a main heat source is used (see, for example, Patent Document 1), and FIG. 2 shows a heat source device under development by a schematic system configuration diagram. In the figure, a tank unit 4 provided with a hot water storage tank 2 and a hot water passage 9 is thermally connected to a fuel cell (FC) 1 via a heat recovery passage 3. The fuel cell 1 is formed of, for example, a polymer electrolyte fuel cell (PEFC) or the like, and reacts hydrogen extracted from a fuel such as city gas with oxygen in the air by the reverse reaction of electrolysis of water. It is a power generation device that generates electricity.

The heat recovery passage 3 is a passage for circulating a liquid (here, hot water) between the fuel cell 1 and the hot water storage tank 2 as shown by arrows A and A'in the figure, for example, in the fuel cell 1. The heat recovery passage 3 through which the fuel passes is provided with a pump (not shown) for circulating a liquid in the heat recovery passage 3. Then, by driving the pump, the water in the hot water storage tank 2 is introduced into the fuel cell 1 through the heat recovery passage 3 as shown by the arrow A'in the figure to be used as cooling water, and this water is used at the time of power generation of the fuel cell 1. After heating by the generated exhaust heat, it is passed through the heat recovery passage 3 as shown by the arrow A in the figure, and is accumulated in the hot water storage tank 2 as hot water having a temperature of, for example, 60 ° C. A bypass passage 7 is connected to the heat recovery passage 3 via a three-way valve 6, and the liquid flowing from the fuel cell 1 side to the hot water storage tank 2 side is not passed through the hot water storage tank 2 as needed. It is formed so that it can be returned to 1.

In the hot water storage tank 2, hot water temperature detecting means 5 in the hot water storage tank 2 for detecting the temperature of the hot water in the hot water storage tank 2 are interposed in the hot water storage tank 2 or on the outer wall of the hot water storage tank 2 in the vertical direction of the hot water storage tank 2 at intervals. (5 in FIG. 2) are provided. The hot water temperature detecting means 5a in the hot water storage tank provided at the uppermost position is filled with hot water at a position lower than the upper end of the hot water storage tank 2 by a predetermined length, that is, to, for example, the upper end of the hot water storage tank 2. It is provided at the position of the hot water surface when hot water having a hot water amount 20 liters less than that of the hot water storage tank 2 is introduced into the hot water storage tank 2.

The hot water passage 9 connected to the upper side of the hot water storage tank 2 is a passage for discharging (sending) hot water formed in the hot water storage tank 2, and the hot water passage 9 is a hot water passage. A hot water storage tank that detects the temperature of hot water passing through 9, a hot water temperature detecting means 11, a tank hot water mixer 12 that changes the amount of hot water sent through the hot water passage 9, and the presence or absence of hot water being sent through the hot water passage 9. For example, a pilot type tank-side solenoid valve 13 is provided to switch the temperature by opening and closing the valve. A pressure relief passage 80 provided with an overpressure relief valve 81 for releasing the pressure to the outside when the pressure in the hot water storage tank 2 exceeds the allowable pressure is connected to the hot water passage 9.

Further, the water supply passage 8 to the heat source device is branched into a water supply passage 8a and a water supply passage 8b, and the water supply passage 8 (8a) on one side is connected to the lower side of the hot water storage tank 2, and the water supply passage 8 on the other side is connected. (8b) is formed so as to join the hot water passage 9 at the hot water merging portion 10. The water supply passage 8b is provided with a water mixer 14 for varying the amount of water flowing from the water supply passage 8b to the hot water confluence portion 10 side. In this heat source device, a mixing means for mixing hot water and water merged at the hot water confluence portion 10 is formed by having a water mixer 14 and the tank hot water mixing mixer 12, and FIG. 2 shows a system. Although the water mixer 14 and the tank hot water mixer 12 are shown at separate positions because of the configuration diagram, they may be provided in the vicinity of the hot water confluence portion 10. Further, the water supply passage 8 is connected to the water supply.

A passage 18 communicates with the hot water confluence portion 10, and a mixing thermistor 28 (28a, 28b) is provided in the passage 18, and the tank unit 4 is a hot water having a hot water supply set temperature set by using, for example, a remote controller or the like. Has a function of discharging hot water through the hot water passage 9 and the passage 18. The hot water introduction side of the water heater 16 as an auxiliary heat source device is connected to the passage 18 via the hot water introduction passage 15, and as shown by the arrow B in FIG. 2, the hot water passage 2 to the hot water passage 9 and the passage are connected. The hot water sent through the hot water 18 (water is sent from the tank unit 4) is introduced into the hot water supply circuit 62 of the water heater 16 via the hot water introduction passage 15 as shown by the arrow B ”in the figure.

The hot water supply circuit 62 of the hot water supply device 16 includes a hot water supply heat exchanger 17 that is heated by the combustion heat of the hot water supply burner 61. The main heat exchanger 17a that absorbs heat and the latent heat recovery heat exchanger 17b that is provided on the upstream side (upstream side of the hot water flow) of the main heat exchanger 17a and recovers the latent heat of the combustion gas of the hot water supply burner 61. And have. It is preferable to provide the latent heat recovery heat exchanger 17b in this way because the water heater 16 having high thermal efficiency can be formed.

Although not shown in the figure, for example, when the hot water supply burner 61 is formed by a gas burner, the hot water supply burner 61 is provided with a gas supply passage for supplying fuel gas, and the gas supply passage is provided with a hot water supply passage through the gas supply passage. A gas on-off valve (gas electromagnetic valve) for controlling the presence or absence of supply to the burner 61 and a gas proportional valve for adjusting the supply amount thereof are provided. In addition, appropriate components (not shown) such as a combustion fan that supplies and exhausts air to the hot water supply burner 61 are provided, and by controlling the components, the heating of the hot water supply heat exchanger 17 can be controlled. Will be done.

A flow rate detection sensor 42 and a water supply temperature detecting means 71 are provided in the passage on the inlet side of the hot water supply circuit 62, and the temperature on the outlet side of the hot water supply heat exchanger 17 is provided in the passage on the outlet side of the hot water supply heat exchanger 17. A hot water supply heat exchange side temperature detecting means 67 for detecting (the temperature of hot water passing through the passage on the outlet side) is provided, and further, on the downstream side thereof, the temperature of hot water supplied through the hot water supply circuit 62 (hot water supply temperature) is detected. The hot water supply temperature detecting means 76 is provided. A hot water supply passage 19 is provided on the outlet side of the hot water supply circuit 62, and the flow rate detection sensor 42 detects the flow rate of hot water supplied through the hot water supply passage 19. The water supply temperature detecting means 71 detects the temperature of hot water introduced into the water heater 62, and may be omitted in some cases.

Further, the hot water supply circuit 62 is provided with a bypass passage 68 for leading the hot water introduced into the hot water supply circuit 62 to the passage 18 side without passing through the hot water supply heat exchanger 17. The capacity of the bypass passage 68 is much smaller than the capacity of the hot water supply heat exchanger 17, for example, the capacity of the main heat exchanger 17a of the hot water supply heat exchanger 17 is 0.6 liters, and the heat exchange for latent heat recovery is performed. The capacity of the vessel 17b is 0.7 liters, while the capacity of the bypass passage 68 is about 0.06 liters. Note that FIG. 2 is a schematic system diagram, and the sizes of the main heat exchanger 17a, the latent heat recovery heat exchanger 17b, and the bypass passage 68 do not correspond to their respective capacities.

For example, a bypass servo 69 provided with a stepping motor is provided in the bypass passage 68, and the distribution ratio of hot water introduced into the hot water supply circuit 62 to the hot water supply heat exchanger 17 side and the bypass passage 68 are controlled by the bypass servo 69. The configuration is such that the distribution ratio to the side is controlled within a predetermined ratio change range.

For example, by controlling the bypass servo 69, for example, the bypass ratio (ratio between the hot water supply heat exchanger 17 side and the bypass passage 68 side) is set to 1: 0, and the hot water introduced into the hot water supply circuit 62 is, for example, 100% hot water supply heat exchanger 17. It can be passed to the side, or it can be branched to the bypass passage 68 side at a ratio such that the bypass ratio is 1: 3.5. The ratio of the hot water supply heat exchanger 17 side and the bypass passage 68 side controlled by the bypass servo 69 is appropriately set to an appropriate value within a predetermined bypass ratio change range such as 1: 0 to 1: 3.5. Variable setting.

This heat source device has a follow-up heating hot water supply function that heats (additionally heats) hot water introduced into the hot water supply circuit 62 of the water heater 16 from the hot water passage 9 side by the hot water supply heat exchanger 17 and supplies hot water from the hot water passage 9. It has a non-additional heating hot water supply function in which hot water introduced into the hot water supply circuit 62 is supplied to the hot water supply destination through the hot water supply circuit 62 without being heated. The water heater 16 supplies hot water introduced into the hot water supply circuit 62 mainly through the bypass passage 68 (in this way, the bypass servo 69 is controlled) when the non-additional heating hot water supply function is operated.

The hot water that has passed through the hot water supply circuit 62 of the water heater 16 can be either hot water that has passed through the hot water supply circuit 62 while being heated by the additional heating hot water supply function, or hot water that has passed through the hot water supply circuit 62 without being heated by the non-additional heating hot water supply function. Hot water is supplied to one or more hot water supply destinations through the hot water supply passage 19. Although not shown in the figure, a hot water tap (including a shower operation lever) is provided on the tip side of the hot water supply passage 19, and by opening this hot water tap, it is stored in the hot water storage tank 2. The hot water that has been collected passes through the hot water passage 9 under the water supply pressure, and is mixed with the water from the water supply passage 8b as necessary, is additionally heated by the water heater 16, or is mixed with water. Hot water is supplied as it is without additional heating.

Further, although not shown, the water heater 16 is provided with, for example, a circuit for reheating the bath, and it is possible to fill the bathtub with hot water or reheat the hot water in the bathtub by using this circuit.

In the figure of FIG. 2, reference numeral 25 is a water entry temperature thermistor, reference numeral 26 is an FC high temperature thermistor for detecting hot water temperature introduced from the fuel cell 1 to the hot water storage tank 2, and reference numeral 27 is from the hot water storage tank 2 to the fuel cell 1 side. Derived FC low temperature thermistors for hot water temperature detection are shown, reference numeral 29 is a water supply flow rate sensor, reference numerals 50 and 51 are check valves, 52 to 57 are valves, 58 is a low temperature sensing thermistor, 59 and 60 are filters, 82. Indicates an overflow passage, 83 indicates a drainage electromagnetic valve, and 84 indicates a drainage passage.

The heat source device shown in FIG. 2 is provided with a control device (not shown), and the control device controls the tank hot water mixer 12 to flow the flow rate of hot water flowing from the hot water passage 9 to the hot water confluence portion 10 side. Mixing to control the flow rate of water flowing from the water supply passage 8b to the hot water confluence portion 10 side, and to form a mixed hot water of an appropriate temperature at the hot water confluence portion 10. A flow rate control means is provided.

When the hot water supply is stopped, for example, the mixing flow rate control means closes the tank-side solenoid valve 13 so that the flow rate of the hot water flowing from the hot water passage 9 to the hot water confluence 10 side (hot water discharged from the hot water storage tank 2) becomes zero. To do. Then, when the hot water tap provided on the tip side of the hot water supply passage 19 is opened, the flow of water is detected by the water supply flow rate sensor 29, so that the mixing flow rate control means receives the detection signal and the tank side electromagnetic valve 13 By controlling the tank hot water mixer 12, the flow rate of hot water flowing from the hot water passage 9 to the hot water confluence 10 side is adjusted as shown by the arrow B in FIG. 2, and by controlling the water mixer 14. As shown by the arrow B'in FIG. 2, the flow rate of the water flowing from the water supply passage 8b to the hot water confluence portion 10 side is adjusted so that the temperature of the mixed hot water formed by the hot water confluence portion 10 is, for example, about the same as the hot water supply set temperature. Make sure that the set mixing temperature is set.

In the hot water stored in the hot water storage tank 2, for example, layers Wa, Wb, and Wc having temperatures as shown in the schematic diagram of FIG. 3 are formed, and the upper layer of the hot water storage tank 2 is formed. Hot water of high temperature Ta (for example, 60 ° C.) heated by the exhaust heat generated during power generation of the fuel cell 1 is stored in the (high temperature layer) Wa, and the hot water storage tank is stored in the lower layer (low temperature layer) Wc of the hot water storage tank 2. Water having the same temperature Tc (for example, 15 ° C.) as the water supply temperature to be supplied is stored in 2, and there is a layer (temperature intermediate layer) Wb having a steep temperature gradient from temperature Ta to temperature Tc between them. .. Therefore, when the hot water in the layer Wa runs out, cold water may be sent from the hot water passage 9 instead of the hot water, but for convenience of explanation, hot water is discharged from the hot water passage 9 unless otherwise specified. The expression of being merged with the hot water confluence portion 10 is used.

For example, as shown in FIG. 3, in the hot water in the hot water storage tank 2, for example, the boundary between the layer Wa and the layer Wb is below the arrangement region of the hot water temperature detecting means 5a in the hot water storage tank, and the hot water temperature detecting means in the hot water storage tank When the detected temperature of 5a is higher than the threshold value set to be 5 ° C higher than the hot water supply set temperature, the temperature of the hot water discharged from the hot water storage tank 2 is a substantially constant value such as 60 ° C.

Therefore, in the mixing flow rate control means, the detection temperature of the mixing thermistor 28 (28a, 28b) is set to be mixed based on the difference between the detection temperature of the mixing thermistor 28 (28a, 28b) and the mixing set temperature (according to the deviation). By controlling the tank hot water mixer 12 and the water mixer 14 so as to reach the temperature, the flow rate of the hot water flowing from the hot water passage 9 to the hot water confluence 10 side and the water flowing from the water supply passage 8b to the hot water confluence 10 side. Controls to adjust the flow rate. The mixing flow rate control means may perform only feedback control without performing feedforward control when controlling the mixing flow rate.

Then, when the temperature of the mixed hot water formed at the hot water confluence portion 10 is set to the mixed set temperature (for example, the same temperature as the hot water supply set temperature or a temperature close thereto) by the control by such a kissing flow rate control means, the mixed hot water Is introduced into the water heater 16 from the hot water confluence portion 10 through the hot water introduction passage 15 as shown by the arrow B "in FIG. 2, but at this time, the water heater 16 is not heated by the hot water supply heat exchanger 17. (By the operation of the non-heated hot water supply function), hot water is supplied to the hot water supply destination through the passage 18 and the hot water supply passage 19.

Further, the detection temperature of the hot water temperature detecting means 5a in the hot water storage tank becomes equal to or lower than the threshold value during hot water supply, and hot water having a mixed set temperature set to the same temperature as the hot water supply set temperature is supplied only by the flow rate control by the mixing flow rate control means. If this is not possible, for example, the mixing set temperature is set to a temperature lower than the hot water supply set temperature, and additional heating is performed by the water heater 16. For example, the mixing set temperature is gradually lowered to a value obtained by subtracting the temperature that rises when the water of the hot water supply flow rate is heated by the MIN number (minimum combustion number) of the water heater 16 from the hot water supply set temperature, and the mixed hot water is reduced. Hot water having a set temperature for hot water supply is produced by heating by the hot water supply heat exchanger 17 by the operation of the additional heating hot water supply function of the water heater 16, and this hot water is supplied to the hot water supply destination through the hot water supply passage 19.

In the conventional heat source device provided with the hot water storage tank 2, a type (integrated type) heat source device in which the tank unit 4 and the water heater 16 are arranged adjacent to each other has been used. An individually arranged heat source device in which the tank unit 4, the water heater 16, and the fuel cell 1 are individually arranged and connected to each other by piping is also possible. In this way, for example, among the plurality of types of tank units 4, the user selects the tank unit 4 provided with the hot water storage tank 2 having the required capacity, and selects the tank unit 4 and the plurality of types of water heaters 16. It is possible to combine the water heater 16 and the fuel cell 1 selected from the plurality of types of fuel cells 1 to increase the variation. Further, the individually arranged heat source device as described above has an advantage that the tank unit 4 or the like can be connected to the existing water heater 16 to form the heat source device.

Japanese Patent No. 4359339

By the way, in the heat source device as shown in FIG. 2, when hot water having a temperature higher than the threshold value is stored in the hot water storage tank 2, the hot water supply temperature is substantially higher than the set hot water supply temperature (for example, the hot water is from the hot water storage tank 2 to the water heater). When hot water is stored from the hot water storage tank 2 to the water heater 16 when hot water is stored at a temperature higher than the set temperature of the hot water supply, for example, 0.5 ° C. It is possible to supply hot water to the hot water without heating (without additional heating by the hot water supply heat exchanger 17 of the water heater 16), but if the hot water in the high temperature layer Wa is used up in the middle of hot water supply. , The temperature of the hot water sent from the hot water storage tank 2 may become lower than the hot water supply set temperature, and the hot water of the hot water supply set temperature may not be sent to the water heater 16 side.

Therefore, for example, the temperature of the hot water sent to the water heater 16 side is gradually lowered before the hot water in the high temperature layer Wa is used up, and at the same time, the temperature of the hot water starts to decrease on the water heater 16 side (the boundary of the hot water temperature). When the part) reaches the water heater 16, the ignition command of the hot water supply burner 61 is transmitted, and the hot water sent to the water heater 16 side whose temperature gradually decreases is heated (additionally heated) by the hot water supply burner 61. It is conceivable to create hot water with a hot water supply set temperature and supply hot water.

However, even if the ignition command of the hot water supply burner 61 is transmitted, the temperature of the hot water cannot be raised rapidly at the same time as the command, and in particular, it is performed according to an ignition sequence program such as for confirmation at the time of ignition. Due to the combustion delay time due to the operation, hot water with the hot water supply set temperature is not formed and undershoot of the hot water supply temperature occurs depending on the above operation, and the undershoot occurs especially when the flow rate is large. There was a problem that it became large.

The present invention has been made to solve the above problems, and an object of the present invention is to undershoot the hot water supply temperature even when the hot water in the hot water storage tank runs out in the middle of discharging the hot water in the hot water storage tank. It is an object of the present invention to provide a heat source device capable of preventing the occurrence of the above-mentioned problems and stabilizing the hot water supply temperature.

In order to achieve the above object, the present invention is a means for solving a problem with the following configuration. That is, in the first invention, there is a hot water storage tank as a main heat source, and a hot water introduction side of a hot water supply circuit of an auxiliary heat source device equipped with a hot water supply heat exchanger is located downstream of the passage of hot water discharged from the hot water storage tank. is connected, the auxiliary the heat source in the equipment Water burner for heating the hot water supply heat exchanger is provided, which detects the hot water flow rate sent to the hot water supply circuit side of the auxiliary heat source apparatus from the hot water storage tank side during the hot water supply The temperature of the hot water stored in the hot water storage tank drops during the flow detection means and the non-combustible hot water supply when the hot water supply burner stops burning, and the hot water of the hot water supply set temperature is sent from the hot water storage tank side to the auxiliary heat source device side. It has a hot water shortage detecting means for detecting information on hot water running out that makes it impossible to supply water, and during non-burning hot water supply while the hot water supply burner is stopped, hot water of the hot water supply set temperature is used as the auxiliary heat source from the hot water storage tank side. The hot water runs out while the water is being sent to the device side, and the temperature of the hot water entering the predetermined hot water supply circuit in the auxiliary heat source device at the predetermined position of the hot water supply timing is from the hot water supply set temperature before the hot water runs out. The hot water supply timing of switching to the hot water shortage temperature lower than the hot water supply set temperature due to the hot water shortage is the hot water shortage detection information of the hot water shortage detecting means, the detected flow rate of the flow rate detecting means, and the hot water supply of the auxiliary heat source device from the hot water storage tank. has a water shortage water inlet timing calculating hand stages determined based on the pipe volume leading to determine the position of the hot water out water inlet timing in the circuit, the hot water supply burner combustion delay time required to start the combustion after receiving ignition command Information is given in advance, and when the hot water running out information is detected by the hot water running out detecting means, only the combustion delay time is obtained from the hot water running out water entering timing calculated by the hot water running out water entering timing calculating means from the time of detecting the hot water running out. A means for solving the problem is provided with a hot water supply burner ignition command transmitting means for transmitting an ignition command for the hot water supply burner when the timing for accelerating the ignition ahead of the front has elapsed.

The second invention is, in addition to the configuration of the first aspect of the present invention, from the hot water supply circuit hot water to be introduced into the fed-water circuit to the hot water supply circuit of the auxiliary heat source apparatus without passing through the hot water supply heat exchanger a bypass passage for deriving are provided, hot water introduced into the hot water supply circuit of the bypass passage and the hot water supply heat exchanger side after passing divided into said bypass passage side and passage of the hot water supply heat exchanger-side forms a structure which merge at the merging portion of the passage is derived from the hot water supply circuit, is set confluence unit as determined position of said hot water out incoming water timing, the melt-out water inlet timing calculating means the hot water supply by water shortage It is characterized in that the timing at which the hot water at the boundary portion from the set temperature or higher to the hot water supply set temperature is lower than the set temperature reaches the confluence portion in the auxiliary heat source device is calculated as the hot water shortage / inflow timing.

Furthermore, a third invention, in addition to the configuration of the first or second invention, the hot water supply burner ignition command transmitting means, said hot water of the water supply time to be water in the auxiliary heat source apparatus side from the hot water tank hot-water determined by the value in terms of hot water accumulated flow that is water from the bath, said from the pipe capacity leading to determine the position of the hot water out water inlet timing in the hot water supply circuit inside the auxiliary heat source apparatus the ignition accelerated timing from the hot water tank calculated as the integrated flow rate subtracted value obtained by subtracting the cumulative flow rate corresponding to the time between the hot water out water inlet timing and the ignition ahead timing, water hot water accumulated flow from the time the melt breakage detection reaches the integrated flow rate subtracted value The feature is that the ignition command of the hot water supply burner is sometimes transmitted.

According to the present invention, since the hot water introduction side of the hot water supply circuit of the auxiliary heat source device equipped with the hot water supply heat exchanger is connected to the downstream side of the passage of the hot water discharged from the hot water storage tank, the hot water is discharged from the hot water storage tank. Hot water can be supplied by passing it through the auxiliary heat source device. Since a hot water supply burner for heating the hot water supply heat exchanger is provided in the auxiliary heat source device, when hot water is introduced into the auxiliary heat source device from the hot water storage tank side, it is assisted when the temperature of the hot water is low. The hot water can be heated by the hot water supply heat exchanger of the heat source device and supplied as the hot water supply set temperature, or when heating is not required, the hot water introduced into the auxiliary heat source device can be supplied as it is through the auxiliary heat source device without heating. ..

Further, in the present invention, during hot water supply, a flow rate detecting means for detecting the flow rate of hot water sent from the hot water storage tank side to the hot water supply circuit side of the auxiliary heat source device , and non-combustible hot water supply when the hot water supply burner is stopped. There is a hot water shortage detecting means for detecting information on hot water running out that the temperature of the hot water stored in the hot water storage tank drops and the hot water of the hot water supply set temperature cannot be sent from the hot water storage tank side to the auxiliary heat source device side. Based on the detection information of these detection means, hot water of the hot water supply set temperature is sent from the hot water storage tank side to the auxiliary heat source device side during non-combustion hot water supply when the combustion of the hot water supply burner is stopped. The hot water runs out on the way, and the temperature of the hot water entering the predetermined hot water supply circuit of the auxiliary heat source device at the predetermined position of the hot water supply timing is changed from the hot water supply set temperature before the hot water drainage to the hot water supply set temperature due to the hot water running out. The out-of-water inflow timing that switches to a temperature below the out-of-water can be detected by the hot-water inflow timing calculation means.

That is, in the present invention, the hot water running out timing calculation means uses the hot water running out detection information of the hot water running out detecting means, the detected flow rate of the flow rate detecting means, and the hot water in the hot water supply circuit of the auxiliary heat source device from the hot water storage tank. The pipe capacity is detected based on the pipe capacity reaching the determination position of the water cut-off timing. For example, the pipe capacity is divided by the detected flow rate (flow rate per unit time) of the flow rate detecting means. Therefore, it is possible to accurately detect the timing of running out of hot water and entering water.

As described above, even if hot water runs out while hot water is being sent from the hot water storage tank to the auxiliary heat source device side, if the hot water supply burner of the auxiliary heat source device is ignited, hot water lower than the hot water supply set temperature is assisted. It can be heated by the hot water supply heat exchanger of the heat source device and can supply hot water at the set temperature of the hot water supply, but it takes some time from receiving the ignition command of the hot water supply burner provided in the auxiliary heat source device until the hot water supply burner starts burning. (For example, it does not ignite immediately after receiving the ignition command, but the combustion starts after performing the operation according to the ignition sequence program such as confirming the confirmation items for ignition), until this time elapses. Since the hot water supply burner does not start burning, unheated hot water will flow through the auxiliary heat source device during this period.

Therefore, in the present invention, the time from when the auxiliary heat source device receives the burner ignition command to when the combustion of the hot water supply burner is started, such as the time required for the auxiliary heat source device to operate according to the ignition sequence program, for example. Is given in advance as information on the combustion delay time, and when the hot water shortage information is detected by the hot water shortage detecting means, the hot water supply burner ignition command transmitting means is calculated by the hot water running out water entry timing calculating means from the time when the hot water running out is detected. By issuing an ignition command for the hot water supply burner when the ignition advance timing before the combustion delay time elapses from the hot water shortage inflow timing, the hot water that is not heated by the hot water supply burner during the combustion delay time elapses. It is possible to prevent the hot water from flowing through the auxiliary heat source device, and it is possible to prevent the hot water being supplied while the temperature is lower than the hot water supply set temperature.

That is, in the present invention, by transmitting the ignition command of the hot water supply burner before the combustion delay time, the low temperature hot water is not sent to the hot water supply side without being heated (during the combustion delay time elapses). (The low-temperature hot water does not flow), and when the hot water at the boundary between the hot water supply set temperature or higher and the hot water supply set temperature is lower than the hot water supply set temperature enters the auxiliary heat source device, the hot water is accurately heated by the hot water supply burner combustion. Hot water with a hot water supply set temperature is formed when it is started, and hot water with a hot water supply set temperature or a temperature close to that temperature can be stably supplied without causing an undershoot of the hot water supply temperature.

Further, the hot water supply circuit of the auxiliary heat source device is provided with a bypass passage for leading the hot water to be introduced into the hot water supply circuit from the hot water supply circuit without passing through the hot water supply heat exchanger, and the hot water to be introduced into the hot water supply circuit is described. Assuming that after passing through the hot water supply heat exchanger side and the bypass passage side separately, they merge at the confluence of the bypass passage and the passage on the hot water supply heat exchanger side and are derived from the hot water supply circuit, the following is assumed. It can be effective.

That is, when the hot water at the boundary where the temperature becomes lower than the hot water supply set temperature due to the hot water running out reaches the confluence portion in the auxiliary heat source device, after that, the hot water water passes through the bypass passage and then the confluence portion. The temperature gradually decreases, but if combustion of the hot water supply burner starts at that point, the hot water from the bypass passage and the hot water that gradually decreases in temperature as described above and the hot water supply heat exchanger are heated. The hot water and the hot water whose temperature gradually rises merge at the confluence to form hot water with a set temperature for hot water supply.

Therefore, the confluence portion is set as a determination position for the hot water supply timing, and the hot water at the boundary portion where the hot water supply set temperature before the hot water drainage becomes lower than the hot water supply set temperature due to the hot water supply is the auxiliary heat source. The combustion of the hot water supply burner is started at the timing when the hot water supply burner reaches the confluence in the device (when the hot water at the boundary reaches the confluence, the combustion delay time elapses after the hot water supply burner ignition command is issued, and the hot water is charged. If the ignition command of the hot water supply burner is transmitted (in front of) the combustion delay time earlier than the timing when the hot water at the boundary reaches the confluence in the auxiliary heat source device (so that heating is started). The hot water supply burner ignition command is issued very reliably before the hot water supply burner ignition command by the hot water supply burner ignition command, which is calculated by the cut-off water timing calculation means as the hot water cut-off water entry timing, and the hot water supply burner ignition command is issued before the combustion delay time. Alternatively, hot water having a temperature close to that temperature can be stably supplied.

Further, when the hot water supply burner ignition command transmitting means obtains the water supply time of the hot water sent from the hot water storage tank to the auxiliary heat source device side by a value converted into the integrated flow rate of the hot water sent from the hot water storage tank, the flow rate detecting means is detected. Based on the flow rate, the water supply time of hot water can be easily and accurately determined.

That is, the hot water supply burner ignition instruction transmission means, igniting the accelerated timing, the melt-out water inlet timing and the ignition ahead from the piping capacity leading to determine the position of the hot water out water inlet timing in the hot water supply circuit in the auxiliary heat source apparatus from the hot water tank Obtained as the integrated flow rate deduction value obtained by subtracting the integrated flow rate corresponding to the time between the timing, and when the integrated flow rate of the hot water sent from the time of running out of hot water reaches the integrated flow rate deduction value, the ignition command of the hot water supply burner is transmitted. Thereby, the ignition command of the hot water supply burner can be easily and accurately transmitted at the timing of advancing the ignition based on the detected flow rate of the flow rate detecting means. Therefore, the timing at which the hot water sent from the hot water storage tank to the auxiliary heat source device is introduced into the auxiliary heat source device at the boundary where the hot water is above the set temperature for hot water supply and below the set temperature for hot water supply, and the timing at which the hot water is started to be heated by the hot water supply burner. It is possible to supply hot water with a stable hot water temperature with great certainty.

It is a block diagram which shows the control structure of one Example of the heat source apparatus which concerns on this invention. It is explanatory drawing for demonstrating the system configuration example of the heat source apparatus of an Example. It is explanatory drawing which shows typically the distribution example of the temperature layer in a hot water storage tank. Relationship between hot water supply burner ignition command transmission timing and hot water supply burner ignition timing, temperature change of hot water sent from the hot water storage tank to the water heater, temperature change of hot water due to heating of the hot water supply burner, and hot water supply temperature in the heat source device of the embodiment. It is a schematic graph for explaining.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of this embodiment, the same components as those of the examples described so far are designated by the same reference numerals, and the duplicated description thereof will be omitted or simplified.

FIG. 1 shows a block diagram of a main part control configuration of an embodiment of the heat source device according to the present invention. The heat source device of this embodiment has the same system configuration as the heat source device shown in FIG. 2, but has a characteristic control configuration shown in FIG.

As shown in the figure, the control device 46 of the water heater 16 has a combustion control means 47 and a bypass servo control means 74, and the combustion control means 47 is a remote controller including a hot water supply setting temperature setting operation means 45. It is connected to the device 43. The remote controller 43 is installed indoors in an appropriate place such as a living room, a bathroom, a kitchen, or a washroom.

Further, in the present embodiment, the control device 33 in the tank unit 4 includes a mixing flow rate control means 35, a hot water supply temperature adjusting means 36, a memory unit 37, a hot water shortage detecting means 34, a hot water running out timing calculating means 72, and a hot water supply. A burner ignition command transmitting means 75 is provided, and the control device 33 is signal-connected to the remote control device 43 and the control device 46.

The hot water supply set temperature setting operation means 45 is an operation means for setting the hot water supply set temperature by a user or the like, and is formed by, for example, an operation button provided on the surface side of the remote controller device 43. The value of the hot water supply set temperature set by the hot water supply set temperature setting operation means 45 is added to the hot water supply temperature adjusting means 36 of the control device 33 of the tank unit 4 and the combustion control means 47 of the control device 46 of the water heater 16. ..

The combustion control means 47 opens the gas on-off valve 48 at the start of combustion of the hot water supply burner 61 to start combustion of the hot water supply burner 61 and controls the combustion thereof, and also controls a combustion fan (not shown) and the like. It is something to do. Since this combustion control method is well known, detailed description thereof will be omitted, but an appropriate combustion control method such as a conventionally known combustion control method or a combustion control method proposed in the future is applied.

The bypass servo control means 74 controls the distribution ratio of hot water introduced into the hot water supply circuit 62 to the hot water supply heat exchanger 17 side and the distribution ratio to the bypass passage 68 side by controlling the bypass servo 69, and burns. The combustion control signal of the control means 47 is taken in, and the bypass servo 69 is appropriately controlled.

The flow rate detection sensor 42 detects the flow rate of hot water supplied through the hot water supply passage 19, and adds the detected flow rate (detected value) of the hot water supply flow rate to the combustion control means 47 of the control device 46. The detection temperature of the hot water supply heat delivery side temperature detecting means 67 and the detection temperature of the hot water supply temperature detecting means 76 are also added to the combustion control means 47, and based on these detected values, the hot water supply burner 61 by the combustion control means 47 (FIG. Combustion control (not shown in 1) is performed.

In this embodiment, the water supply flow rate sensor 29 functions as a flow rate detecting means for detecting the flow rate of hot water sent from the hot water storage tank 2 side to the hot water supply circuit 62 side of the water heater 16 during hot water supply, and mixes the control device 33. The detected flow rate (detection value) is added to the flow rate control means 35, the hot water supply temperature control means 36, the hot water outflow / inflow timing calculation means 72, and the hot water supply burner ignition command transmission means 75.

The hot water supply temperature adjusting means 36 sets a set temperature (mixing set temperature) of the mixed hot water formed by mixing the hot water discharged from the hot water storage tank 2 and the hot water from the water supply passage 8b, and sets the set temperature of the mixed hot water. A command is given to the mixing flow rate control means 35 so that hot water is formed.

The mixing flow rate control means 35 opens the tank-side electromagnetic valve 13 when the hot water supply flow rate of hot water supplied through the hot water supply passage 19 is detected by the water supply flow rate sensor 29, and is controlled by the tank hot water mixer 12 and the water mixer 14. By controlling the flow rate of hot water and the flow rate of water, the temperature of the mixed hot water formed by the hot water confluence portion 10 is set to the mixed set temperature set by the hot water supply temperature adjusting means 36.

In the mixing flow rate control means 35, when the detection temperature of the hot water temperature detecting means 5a in the hot water storage tank is higher than the threshold value, the temperature of the mixed hot water is set to the hot water supply set temperature (or a temperature 0.5 ° C. higher than the hot water supply set temperature). When the detection temperature of the hot water temperature detecting means 5a in the hot water storage tank becomes equal to or lower than the above threshold value, the temperature rises when, for example, the water of the hot water supply flow rate is heated from the hot water supply set temperature with the minimum combustion number of the hot water supply device 16. Control is performed so that the value is gradually lowered to the value obtained by subtracting the temperature component.

The hot water supply heat exchanger 17 provided in the water heater 16 is, for example, only a copper sensible heat exchanger, or a copper sensible heat exchanger to which a stainless steel latent heat recovery heat exchanger is added. It has a heat capacity in both configurations. Therefore, even when the hot water supply burner combustion is stopped, the hot water temperature passing through the hot water supply heat exchanger 17 is gradually lowered by gradually lowering the hot water temperature sent from the hot water storage tank 2 side to the water heater 16 side as described above. When the temperature gradually decreases, the heat stored in the hot water supply heat exchanger 17 is released and transferred to the passing hot water, so that the temperature of the hot water discharged from the hot water supply heat exchanger 17 is relative to the temperature of the hot water entering the hot water supply heat exchanger 17. Will be slightly higher. Then, assuming that the rate of lowering the temperature of the hot water introduced into the hot water supply heat exchanger 17 is constant regardless of the magnitude of the flow velocity of the hot water passing through the hot water supply heat exchanger 17, the retained heat stored in the hot water supply heat exchanger 17 is maintained. As the flow velocity of the passing hot water decreases faster, it is necessary to increase the amount of heat of heating at the time of ignition of the hot water supply burner 61 in the water heater 16 described later, or to advance the ignition timing of the hot water supply burner 61. ..

Therefore, in this embodiment, the lowering speed of the hot water sent from the hot water storage tank 2 side to the water heater 16 side is not changed according to the magnitude of the flow velocity of the hot water, but the lowering speed of the hot water temperature is set to the flow rate of the hot water. It is variable according to the size, and the larger the flow rate, the faster the rate of lowering the hot water temperature. Actually, there is a difference due to the heat transfer coefficient from the hot water supply heat exchanger 17 to the hot water passing through the hot water supply heat exchanger 17 depending on the magnitude of the flow velocity. However, the larger the flow rate of the hot water flowing through the hot water supply heat exchanger 17 (the larger the flow rate of the hot water, the larger the heat transfer coefficient), the faster the stored heat stored in the hot water supply heat exchanger 17 is taken away.

In the hot water shortage detecting means 34, the temperature of the hot water stored in the hot water storage tank 2 drops during non-combustible hot water supply when the hot water supply burner 61 stops burning, and the water heater starts from the hot water storage tank 2 side (tank unit 4 side). Information on running out of hot water that makes it impossible to supply hot water at the set temperature of hot water supply to the 16 side is detected. For example, the detection temperature of the hot water temperature detecting means 5a in the hot water storage tank is taken in every moment, and when this detection temperature becomes equal to or lower than the above threshold value. Judge that the water has run out.

In the hot water supply timing calculation means 72, the hot water runs out while the hot water of the hot water supply set temperature is being sent from the hot water storage tank 2 side to the water heater 16 side, and the hot water temperature entering the water heater 16 becomes the hot water runout. hot water out water inlet timing from before the hot water set temperature is switched to the hot water out temperature below the hot water set temperature by the hot water out, and the hot water out detection information of the hot water out detector 34, and detects the flow rate of feed water flow sensor 29, the hot water storage It is obtained based on the piping capacity from the tank 2 to the inside of the hot water supply circuit 62 of the water heater 16.

In the present embodiment, in the water heater 16, the hot water introduced into the hot water supply circuit 62 is divided into a passage on the hot water supply heat exchanger 17 side and a bypass passage 68 side, and then passes through the bypass passage 68 and the hot water supply heat exchanger 17 side. It is configured to be derived from the hot water supply circuit 62 by merging at the merging portion 70 with the passage of the hot water supply, and the hot water shortage inflow timing calculation means 72 is a boundary portion where the hot water supply set temperature is changed from the hot water supply set temperature to less than the hot water supply set temperature due to the hot water running out. The timing at which the hot water reaches the confluence 70 in the water heater 16 is calculated as the hot water out-of-water inflow timing.

Information on the piping capacity from the hot water storage tank 2 to the determination position of the hot water running out / entering timing in the hot water supply circuit 62 of the water heater 16 (specifically, the merging portion 70 of the hot water supply circuit 62) is stored in the memory unit 37, and the hot water The cut-in water timing calculation means 72 takes in this information and divides the pipe capacity from the hot water storage tank 2 to the confluence 70 of the hot water supply circuit 62 of the water heater 16 by the detected flow rate (flow rate per unit time) of the water supply flow rate sensor 29. Therefore, the timing of running out of hot water and entering water is calculated.

Further, the memory unit 37 is provided with information (combustion delay time = for example, 3 seconds) of the combustion delay time required from the reception of the ignition command by the hot water supply burner 61 to the start of combustion. When the hot water shortage detecting means 34 detects the hot water running out information, the hot water supply burner ignition command transmitting means 75 advances the ignition forward by the combustion delay time before the hot water running out water entering timing calculated by the hot water running out water entering timing calculating means 72. The ignition command of the hot water supply burner 61 is transmitted at the timing, and the ignition command is added to the combustion control means 47.

In this embodiment, the hot water supply burner ignition command transmitting means 75 takes in the detected flow rate of the water supply flow rate sensor 29, and sets the water supply time of the hot water supplied from the hot water storage tank 2 to the water heater 16 side as the hot water water supplied from the hot water storage tank 2. The ignition advance timing is determined by the value converted to the integrated flow rate, and the hot water sent from the hot water storage tank 2 at the time of detecting the hot water shortage is determined from the hot water storage tank 2 to the hot water shortage inflow timing in the water heater 16 (here, the confluence portion). up flowing to 70) (up to the merging portion 70) water supply hot water accumulated flow (i.e., from the piping volume) leading to the merging portion 70 from the hot water tank 2 and the ignition accelerated timing and the hot water out water inlet timing It is obtained as an integrated flow rate deduction value obtained by subtracting the integrated flow rate corresponding to the intervening time (time corresponding to the combustion delay time, for example, 3 seconds). Then, when the integrated flow rate of the hot water supplied from the hot water storage tank 2 to the water heater 16 from the time when the hot water runs out reaches the integrated flow rate deduction value, the ignition command of the hot water supply burner 16 is transmitted. This transmission signal is added to the combustion control means 47, and the combustion control means 47 controls the ignition of the hot water supply burner 16.

As described above, in the present embodiment, both the calculation of the hot water drainage and inflow timing and the calculation of the ignition advance timing are performed based on the calculation of the integrated flow rate of the hot water supply and hot water, so that each timing can be calculated easily and. It is possible to accurately perform the ignition command transmission of the hot water supply burner 16 which is performed at the timing of accelerating the ignition at an accurate timing.

This embodiment is configured as described above, and corresponds to the case where the hot water supply flow rate is small and the integrated flow rate of the hot water supply corresponding to the combustion delay time is small, and conversely the hot water supply flow rate is large and corresponds to the combustion delay time. Comparing with the case where the integrated flow rate is large, when the hot water supply flow rate is large, the ignition advance timing corresponding to the combustion delay time is advanced by the amount of the large flow rate during the elapsed combustion delay time, and the hot water supply burner 16 The ignition command is also sent earlier.

Therefore, for example, when the hot water supply flow rate is large, the ignition command of the hot water supply burner 16 may be transmitted long before the hot water supplied from the hot water storage tank 2 to the water heater 16 side reaches the water heater 16. When the hot water supply flow rate is small, the ignition command of the hot water supply burner 16 may be transmitted after the hot water water sent from the hot water storage tank 2 to the water heater 16 side is introduced into the water heater 16.

The larger the flow rate of the hot water flowing through the hot water supply heat exchanger 17, the more heat stored in the hot water supply heat exchanger 17 before the ignition of the hot water supply burner 16 is taken away. , It is possible to respond to the increase in heat replenishment at an early stage, and the hot water temperature stabilizes early. Therefore, in addition to the ignition advance timing corresponding to the combustion delay time, the ignition advance timing corresponding to the increase / decrease in the retained heat of the hot water supply heat exchanger 17 may be controlled (for example, the water heater from the hot water storage tank 2). If the flow rate of hot water sent to the 16 side is large and a large amount of retained heat stored in the hot water supply heat exchanger 17 is taken away, the ignition command of the hot water supply burner 15 may be issued earlier). In the configuration for performing such control, for example, information for obtaining the ignition advance timing based on the flow rate of hot water sent from the hot water storage tank 2 to the water heater 16 side in the memory unit 37 (for example, appropriate information such as table data and calculation formula). ) Is also stored, and the hot water supply burner ignition command transmitting means 75 may transmit the ignition command of the hot water supply burner 61 based on the information.

FIG. 4 shows an example of the following temperature characteristics when the hot water supply flow rate is large in this embodiment. The characteristic line a shows the temporal change of the hot water temperature sent from the hot water storage tank 2 side to the water heater 16 side, the characteristic line b shows the temporal change of the hot water temperature increased by heating the hot water burner 16, and the characteristic line c shows the temporal change of the hot water temperature. The time change of the hot water supply temperature is shown, and Tb in the figure shows the ignition command transmission timing of the hot water supply burner.

As shown in the characteristic line a in the figure, the timing at which the hot water at the boundary portion where the hot water supply set temperature or higher becomes lower than the hot water supply set temperature due to running out of hot water reaches the confluence 70 in the water heater 16 is Tg. In this embodiment, the ignition command to the hot water supply burner 61 is transmitted at the ignition advance timing (Tb) which is earlier than this timing by the combustion delay time (time ta), so that the hot water supply is as shown in the characteristic line b. It is the timing Tg that the temperature rises due to the start of combustion of the burner 16. That is, when the hot water at the boundary reaches the confluence 70, heating of the hot water at the boundary is started.

Then, the temperature of the hot water reaching the confluence 70 gradually decreases as shown in the characteristic line a, but the temperature gradually increases as shown in the characteristic line b as the hot water supply burner 61 burns. Then, the temperature drop of the hot water arriving from the hot water storage tank 2 side is supplemented by the temperature rise due to the combustion of the hot water supply burner 61, and as shown in the characteristic line c, the hot water supply temperature becomes the hot water supply set temperature and the hot water supply is stable. Is done. When the hot water supply flow rate is small, the time ta between the timing Tb and Tg is short, but the same effect can be obtained by the same operation.

The present invention is not limited to the above-described embodiment, and various aspects can be adopted as long as the technical scope of the present invention is not deviated. For example, in the above embodiment, in the hot water supply timing calculation means 72, the hot water at the boundary portion where the hot water supply set temperature before the hot water drainage becomes lower than the hot water supply set temperature due to the hot water drainage is inside the water heater 16. The timing of reaching the merging portion 70 is calculated as the hot water draining / entering timing, but the hot water running out / entering water timing calculating means 72 determines the timing at which the hot water at the boundary reaches, for example, a position slightly before the merging portion 70. It may be calculated as the timing of running out of hot water and entering water. That is, it is preferable that the determination position for detecting the hot water drainage timing ( determination position of the hot water drainage timing) is the merging portion 70 as in the above embodiment, but in the hot water supply circuit 62 other than the merging portion 70. It can be in an appropriate position.

Further, the details of the system configuration of the heat source device of the present invention are not necessarily the configurations shown in FIG. 2, and are appropriately set. For example, the hot water supply heat exchanger 17 of the water heater 16 may not have a heat exchanger for latent heat recovery, or as a type of water heater that heats the hot water supply heat exchanger 17 by, for example, an oil combustion type burner device. May be good.

Further, in the above embodiment, the hot water storage tank 2 is thermally connected to the fuel cell 1, but instead of the fuel cell 1, a solar heat collector, a heat pump, or the like may be connected.

The heat source device of the present invention can stabilize the hot water supply temperature and is easy to use, so that it can be used as a heat source device for home use, for example.

1 Fuel cell 2 Hot water storage tank 3 Heat recovery passage 4 Tank unit 5 Hot water temperature detection means in hot water storage tank 8, 8a, 8b Water supply passage 9 Hot water outlet passage 10 Hot water confluence 11 Hot water storage tank hot water temperature detection means 12 Tank hot water mixer 37, 73 Memory unit 34 Hot water shortage detection means 47 Combustion control means 72 Hot water shortage inflow timing calculation means 75 Hot water supply burner Ignition command transmission means

Claims (3)

The auxiliary heat source device has a hot water storage tank as a main heat source, and the hot water introduction side of the hot water supply circuit of the auxiliary heat source device equipped with a hot water supply heat exchanger is connected to the downstream side of the passage of hot water discharged from the hot water storage tank. a flow rate detecting means for detecting a hot water flow rate sent hot water burner is provided for heating the hot water supply heat exchanger, from the hot water tank side in the hot water supply to the hot water supply circuit side of the auxiliary heat source unit within the water heater burner Information on hot water running out that the temperature of the hot water stored in the hot water storage tank drops during non-combustion hot water supply at the stop of combustion, and hot water of the hot water supply set temperature cannot be sent from the hot water storage tank side to the auxiliary heat source device side. During non-combustion hot water supply while the hot water supply burner is stopped, hot water of the hot water supply set temperature is being sent from the hot water storage tank side to the auxiliary heat source device side. The temperature of the hot water that enters the hot water supply circuit in the auxiliary heat source device at a predetermined position for determining the timing of the hot water supply is changed from the hot water supply set temperature before the hot water supply to the hot water supply set temperature due to the hot water supply. The hot water running out timing that switches to a hot water running out temperature less than the hot water running out detection information of the hot water running out detecting means, the detected flow rate of the flow rate detecting means, and the hot water running out water entering timing in the hot water supply circuit of the auxiliary heat source device from the hot water storage tank. has a water shortage water inlet timing calculating hand stages determined based on the pipe volume leading to determine the position, the hot water supply burner combustion delay time required to start the combustion after receiving ignition command information are given in advance, When the hot water running out information is detected by the hot water running out detecting means , the ignition advance timing before the burning delay time has elapsed from the hot water running out water entering timing calculation means calculated by the hot water running out water entering timing calculation means. heat source and wherein the hot water supply burner ignition command transmitting means for transmitting an ignition command for the hot water supply burner when it is provided. It said auxiliary to the hot water supply circuit of a heat source device is provided with a bypass passage for deriving from the hot water supply circuit without passing through the hot water to be introduced into the fed-water circuit to the hot water supply heat exchanger, hot water introduced into the hot water supply circuit Is divided into a passage on the hot water supply heat exchanger side and a passage on the bypass passage side, and then merges at the confluence of the bypass passage and the passage on the hot water supply heat exchanger side to be derived from the hot water supply circuit. form, is set confluence unit as determined position of said hot water out incoming water timing, hot water of the hot water out incoming water timing calculating means boundaries of the hot water out the hot water set temperature below the above said hot water set temperature is the auxiliary heat source The heat source device according to claim 1, wherein the timing of reaching the confluence in the device is calculated as the timing of running out of hot water and entering water. The hot water supply burner ignition command transmitting means is determined by the value of the hot water storage tank hot water water time that is water in the auxiliary heat source apparatus side in terms of hot water accumulated flow that is water from the hot water tank, the ignition ahead timing subtracting the cumulative flow rate corresponding to the time between the auxiliary heat source wherein the ignition accelerated timing and the hot water out water inlet timing from the piping capacity leading to determine the position of the hot water out water inlet timing in the hot water supply circuit in the apparatus from the hot water tank it was determined as the integrated flow rate subtracted value, claim 1, characterized in that it has a structure in which water hot water accumulated flow from the time the melt breakage detection originates a ignition command of the hot water supply burner when it reaches the integrated flow rate subtracted value Alternatively, the heat source device according to claim 2.

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