JP6449687B2 - Heat source equipment - Google Patents

Description

  The present invention relates to a heat source device having a configuration in which a liquid circulation pipe for heating and hot water supply is heated by a common burner.

  Conventionally, for example, a single-can two-water channel heat exchanger in which a hot-water supply exchanger and a heat exchanger for bathing are integrated is provided, and the single-can two-water channel heat exchanger is used with a common burner. A heating type heat source device is used, and FIG. 13 schematically shows a cross-sectional configuration of the single-can two-water channel heat exchanger (see, for example, Patent Document 1).

  As shown in the figure, this one-can two-water channel type heat exchanger 201 has a hot water supply heat transfer tube 141 that forms a hot water supply heat exchanger 141 and a circulating heating heat transfer tube 142 that forms a reheating heat exchanger. Are provided in contact with each other in a manner of sandwiching them vertically, and in the same figure, a common fin 43 is provided on the outer peripheral side of these heat transfer tubes 141 and 142. In this single-can two-water channel heat exchanger 1, water is introduced from one end side of the hot water supply heat transfer pipe 141 arranged at the lowermost stage and heated by a burner, as indicated by an arrow A in the figure. Water is led out through the hot water supply heat transfer pipe 141 disposed at the uppermost stage to perform hot water supply, and hot water passing through the central heating heat transfer pipe 142 is heated by the burner when the bath is replenished. .

  When the heat source device is formed by providing such a can-two-water channel type heat exchanger 201, the heat source device can be downsized as compared with the case where the heat exchanger for bath and the heat exchanger for hot water supply are individually formed. There is an advantage that can be achieved.

No. 8-7307 Japanese Patent No. 4071224

  Incidentally, in recent years, in order to supply a liquid heat medium such as hot water to a heating device such as a hot water mat or a bathroom dryer, a heat source device provided with a heating circuit connected to the heating device has been widely used. ing. In the heat source device having such a heating circuit, in order to reduce the size of the heat source device, in the configuration proposed in Patent Document 1, a liquid is used in the heating device instead of the heat exchanger for reheating the bath. It is conceivable to form a one-can two-water channel heat exchanger by providing a heating heat exchanger for supplying the heat medium.

  That is, for example, it is conceivable to provide a heat transfer tube of a heat exchanger for heating instead of the heat transfer tube 142 for circulation heating forming the heat exchanger for reheating in the configuration of FIG. The heat pipe 141 is provided in such a manner as to sandwich the heat transfer pipe of the heat exchanger for heating up and down, but in that case, the heating capacity can be obtained only to the same extent as the reheating capacity. However, since the capacity required for heating is higher than the capacity for catching up, there arises a problem that the required capacity for heating becomes insufficient.

  In addition, in a heat source device equipped with a hot water supply function, the user will use hot water supply in the kitchen, washroom, etc. or hot water use using a shower in the bathroom, etc. It is strongly hoped that the hot water at the set temperature set by the user is discharged from the shower nozzle by a sufficient amount according to the user's operation, and the hot water temperature is too low or the hot water flow rate is too low. Then it feels very uncomfortable. Moreover, compared to using hot water in the kitchen or washroom, the flow rate when using hot water using a shower in the bathroom is larger, so the hot water supply temperature is set even when hot water is supplied with such a large hot water flow rate (outflow). It is also important in the heat source device to be able to supply hot water.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a heat source device that can sufficiently obtain hot water supply capability and heating capability even in a small size and can be comfortably used by a user. It is in.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention includes a hot water supply heat exchanger, a hot water supply circuit having a function of heating water that is a liquid heat medium by the hot water supply heat exchanger and supplying hot water to a hot water supply destination, a heating heat exchanger, And a heating circuit connected to a heating device, wherein the hot water supply heat exchanger is a liquid circulation forming the hot water supply heat exchanger. A main hot water supply heat exchanger for recovering sensible heat of the combustion gas of the burner device by a pipe line, and a hot water supply heat exchanger for recovering latent heat of the combustion gas, the heating heat exchanger comprising: A main heating heat exchanger for recovering sensible heat of the combustion gas of the burner device by a liquid flow line forming a heating heat exchanger, and a heating heat exchanger for recovering latent heat for recovering the latent heat of the combustion gas; A liquid circulation pipe of the main hot water supply heat exchanger Having at least a part of a two-type pipe arrangement part arranged in contact with each other in a mode sandwiched vertically by the liquid circulation pipe of the main heating heat exchanger. A liquid heat exchanger for the latent heat recovery is provided on the outlet side of the main heating heat exchanger. There is provided a liquid-water heat exchanger for hot water supply heating thermal connection that is thermally connected to either the main hot water supply heat exchanger or the outlet side of the main hot water heat exchanger, and the heating circuit Is provided with a latent heat exchange bypass passage for circulating the heat medium without passing through the heating heat exchanger for collecting latent heat, and the latent heat exchange bypass is provided by driving the circulation pump for heating. Passage, main heating heat exchanger and hot water heating / heating liquid-water When a bypass switching path that circulates through the exchanger is formed and a predetermined path switching condition is satisfied during hot water supply single operation in which hot water supply operation is performed without supplying the heating medium of the heating circuit to the heating device, The heat medium circulation path of the heating circuit driven by the heating circulation pump is a latent heat exchange path that is circulated through both the bypass path and the path through the latent heat recovery heating heat exchanger. A configuration in which route switching control means is provided serves as means for solving the problem.

  Further, in the second invention, in addition to the configuration of the first invention, the route switching condition is set when the hot water supply request capability required at the time of hot water single operation exceeds a predetermined route switching reference value. It is characterized by that.

Further, the third invention has a recirculation circuit connected to the bathtub and having a function of circulating water in the bathtub in addition to the configuration of the first or second invention, A water circulation line is thermally connected to the liquid circulation line of the heating circuit via a reheating liquid-water heat exchanger, and the heating medium is circulated through the heating circuit. A heating medium introduction switching valve is provided for switching presence / absence of introduction into the soaking liquid-water heat exchanger by switching the valve, and when the heating medium in the heating circuit is circulated by a latent heat exchange route, the recirculation circulation The heat medium introduction switching valve is opened by the path switching control means while the water circulation operation in the circuit is stopped, and the reheating liquid-water heat exchanger is circulated to the heating circuit through the heat medium. Special To.

  Furthermore, the fourth aspect of the invention includes a water amount servo for variably adjusting the total amount of hot water supplied through the hot water supply circuit in the hot water supply circuit in addition to the configuration of the first, second or third invention. Is provided.

  According to the present invention, the liquid circulation pipes of the main hot water supply heat exchanger provided in the hot water supply circuit are in contact with each other in a manner sandwiched up and down by the liquid circulation pipes of the main heating heat exchanger provided in the heating circuit. It has a composite heat exchanger having at least a part of the arranged two-type pipe arrangement part and heating the two kinds of liquid circulation pipes of the two-type pipe arrangement part by a common burner device. Therefore, it is possible to reduce the size of the heat source device as compared with the case where the main hot water supply heat exchanger and the main heating heat exchanger are separately formed, and the main hot water supply heat exchange is performed in the two-type pipe arrangement portion. It is possible to heat the liquid flow conduits of the heat exchanger for heating provided above and below the liquid flow conduit of the heater by the burner device so that sufficient heating capacity can be obtained.

  In the present invention, the lowermost (lowermost position) passage in the two-type conduit arrangement portion is a liquid circulation conduit for heating, and the liquid (heat medium) flowing through the conduit is heated. Since it is warm if it is in a circulating state, and even if the circulation is stopped, it is rare that it is in a cold state like a liquid circulation pipe for hot water supply in which cold water is introduced from the water supply side. It is possible to prevent dew condensation from occurring in the liquid flow conduit of the composite heat exchanger.

  In the present invention, the liquid flow conduit of the main hot water supply heat exchanger is disposed between the liquid flow conduits of the main heating heat exchanger so that the main hot water supply Since the arrangement ratio of the liquid circulation pipe of the heat exchanger is smaller than the arrangement ratio of the liquid circulation pipe of the main heating heat exchanger, the heating capacity may be insufficient only by heating of this component part, On the other hand, the shortage can be sufficiently compensated by the following configuration.

  That is, in the present invention, either the hot water supply heat exchanger for recovering latent heat in the hot water supply circuit and the main hot water supply heat exchanger, the outlet side of the main hot water supply heat exchanger, or the main heating heat of the heating circuit. Since a liquid-water heat exchanger for hot water heating / heating is connected to the outlet side of the exchanger thermally, the liquid / water heat exchanger for hot water heating / heating is connected as necessary. By transmitting the heat of the heating circuit to the hot water supply circuit side, the lack of hot water supply capacity can be replenished.

  In the present invention, the heating circuit is provided with a latent heat exchange bypass passage for circulating through the heat exchanger for recovering the latent heat of the heating heat exchanger without passing through the heat medium. As a circulation path of the heat medium that circulates through the heating circuit, the latent heat heat exchange bypass passage, a heating liquid circulation line forming a composite heat exchanger, a hot water heating / thermal connection liquid-water heat exchanger, and A bypass path for circulating the heat medium in the heating circuit is formed.

  Then, when a predetermined path switching condition is satisfied during a hot water supply independent operation in which a hot water supply operation is performed without supplying the heating medium of the heating circuit to the heating device, the heating is circulated by driving a heating circulation pump. There is provided a path switching control means for making the path of the heat medium of the circuit a latent heat exchange route that circulates through both the bypass path and the path through the heating heat exchanger for recovering latent heat. Therefore, the following effects can be obtained by the control of the path switching control means.

  That is, as described above, in the configuration having the liquid-water heat exchanger for hot water supply / heating, when the hot water supply is operated alone, the heating medium of the heating circuit is passed through the liquid / water heat exchanger for hot water supply / heating thermal connection. By supplying heat to the hot water supply circuit from the liquid / water heat exchanger for hot water heating / heating thermal connection, it is possible to improve the hot water supply capacity (including replenishment in the case of a shortage). The temperature of the heat medium that flows through the heating-heat connection liquid-water heat exchanger is higher and the flow rate is larger.

  Therefore, for example, the route switching condition is when the hot water supply request capability required during hot water supply independent operation in which hot water supply operation is performed without supplying the heat medium to the heating device exceeds a predetermined route switching reference value. If the circulation path of the heating medium in the heating circuit is used as a latent heat exchange path, the heating medium is circulated through both the bypass path and the circulation path through the heating heat exchanger for latent heat recovery. The temperature of the heat medium passing through the connecting liquid-water heat exchanger can be increased and the flow rate can be increased.

  That is, by circulating the heat medium path of the heating circuit as a latent heat exchange path through the heating heat exchanger for recovering latent heat, the latent heat recovery of the burner device by the heating heat exchanger for recovering latent heat is performed. In addition to increasing the temperature of the heat medium, the heat medium can be circulated only through the bypass path by circulating the heat medium circulation path through both the bypass path and the path through the heating heat exchanger for latent heat recovery. The circulating flow rate of the heat medium can be increased as compared with the case of circulation.

  Therefore, for example, when circulating the heated heat medium of the heating circuit during the hot water supply single operation, it is determined as a route switching condition that the heat medium of the heating circuit is circulated through the latent heat exchange route, and the burner device for heating during the hot water supply single operation When the heating medium is circulated and the heating medium is circulated, the circulation path of the heating medium is used as a latent heat exchange path, so that from the heating circuit side through the liquid-water heat exchanger for hot water heating and thermal connection. A lot of heat can be supplied to the hot water supply circuit side.

  In this way, by providing a configuration in which the heating medium heated in the heating circuit is circulated through the latent heat exchange path during the hot water supply single operation, the hot water heating / heating thermal connection liquid-water heat exchanger provided in the heat source device is reduced in size. As a matter of fact, the hot water supply capacity can be more reliably exhibited. That is, for example, when the liquid-water heat exchanger for hot water heating / heating thermal connection is a heat exchanger having a double pipe that allows liquid to pass through, the hot water can be supplied even if the length of the double pipe is shortened. If the plate-type heat exchanger is used as the liquid / water heat exchanger for hot water heating / heating thermal connection, the hot water supply capability can be reliably exhibited even if the number of plates is reduced. Thus, the heat source device can be reduced in size and cost.

  Note that, for example, even when a heating burner device is also burned during circulating hot water supply operation and the heating medium of the heating circuit is circulated, for example, from the heating circuit side via a liquid-water heat exchanger for hot water heating / heating thermal connection When the amount of heat to be supplied to the hot water supply circuit is small, the temperature of the heat medium in the heating circuit may not be so high, and the circulation flow rate of the heat medium may not be large. Therefore, in such a case, if the heat medium is circulated through the bypass path without passing the heat medium through the heat exchanger for recovering latent heat, the load for circulating the heat medium can be reduced, so that Since the power consumption of the circulation pump can be reduced, energy saving can be achieved.

  Therefore, when setting the path switching reference value, the amount of heat given from the heating circuit side to the hot water supply circuit side is set so as to correspond to a value that reaches a predetermined reference heat amount, and when it is equal to or less than that value, the burner device for heating If the heat medium in the heating circuit is circulated in the bypass path while the heat is being burned, and the heat medium can be circulated in the path through the latent heat exchange when the path switching reference value is exceeded, the required hot water supply capacity is supported. When the required hot water supply capacity is small, energy saving can be achieved, and when the required hot water capacity is large, the hot water supply capacity can be increased by accurately responding.

  Furthermore, it has a recirculation circuit that is connected to the bathtub and has a function of circulating the water in the bathtub, and the water circulation line of the recirculation circuit is heated via the reheating liquid-water heat exchanger. By thermally connecting to the liquid flow conduit of the circuit, a heat source device that can improve the reheating operation of the bathtub can be formed.

  Then, in the configuration in which the path switching control means for switching between the latent heat exchange route and the bypass route is provided, when the heat medium of the heating circuit is circulated by the latent heat exchange route, the water circulation operation in the recirculation circuit When the heating medium introduction switching valve is opened while the heating medium is stopped and the circulation liquid-water heat exchanger is circulated through the heating medium to the heating circuit, the heating medium introduction switching valve can be easily opened. The heat medium can be circulated through the latent heat exchange route, the circulation flow rate can be increased, and the above effects can be easily achieved.

  Furthermore, by providing a water amount servo for variably adjusting the total amount of hot water supplied through the hot water supply circuit in the hot water supply circuit, for example, if necessary, the total amount of hot water is reduced to reduce the hot water supply capacity. Thus, the hot water temperature can be quickly raised and stabilized, so that the hot water temperature can be stabilized even better. In addition, if the hot water supply temperature is stabilized by reducing the total amount of hot water, the hot water supply capacity can be increased by increasing the total amount of hot water after that, so it can be adjusted to the required hot water supply capacity. By not performing the operation of reducing the total amount of hot water supply when there is no hot water supply, hot water supply according to the required hot water supply capacity can be performed.

It is typical explanatory drawing which shows the system configuration | structure of the heat source apparatus of 1st Example of the heat source apparatus which concerns on this invention with the heating apparatus etc. which are connected to a heat source apparatus. It is explanatory drawing which shows typically the arrangement structure of the heat exchanger and burner apparatus in an Example. It is a block diagram which shows the principal part structure of the control structure provided in the heat-source apparatus of an Example. It is the typical perspective view (a) and top view (b) for demonstrating the structure of the burner apparatus for hot_water | molten_metal supply and heating applied to the heat source apparatus of an Example. It is a graph for demonstrating the relationship between the combustion surface switching operation | movement of a burner apparatus at the time of the hot water supply independent operation of the heat source apparatus of an Example, and hot water supply capability. It is a graph for demonstrating the relationship between the combustion surface switching operation | movement of a burner apparatus and the hot water supply capability at the time of the hot water supply simultaneous operation of the heat source apparatus of an Example. It is a typical system explanatory view for explaining the example of the heat carrier circulation path of the heating circuit in the heat source device of an example. It is typical explanatory drawing which shows the system configuration | structure of the heat-source apparatus of 2nd Example. It is typical sectional explanatory drawing which shows the example of arrangement | positioning of the heat exchanger applied to the other Example of the heat-source apparatus which concerns on this invention, and a burner apparatus. It is typical explanatory drawing which shows the arrangement | positioning of the burner apparatus in the heat source apparatus of this inventor leading to invention of the heat source apparatus of an Example, and the aspect of a composite heat exchanger. It is typical explanatory drawing which shows the structure of the heat source apparatus which has the composite heat exchanger proposed conventionally. It is typical explanatory drawing for simplifying the structure of FIG. 11 and explaining the problem of the heat source apparatus shown by FIG. It is typical explanatory drawing which shows the structural example of the heat exchanger of the one can two water channel type proposed conventionally.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in the description of the present embodiment, the same reference numerals are given to the same name portions as those in the examples described so far, and the duplicate description is omitted or simplified.

  FIG. 1 schematically shows a system configuration of a first embodiment of the heat source apparatus according to the present invention. As shown in the figure, the heat source device of the present embodiment is a composite heat source device formed by providing a hot water supply circuit 45 and a heating circuit 7 in an appliance case 80. This heat source device has a combustion chamber 100, and a burner device 2 (2a, 2b, 2c) for hot water supply and a burner device 5 for heating are provided in the combustion chamber 100.

  The hot water supply burner device 2 has a plurality of burner devices 2a, 2b, and 2c, and is formed in a manner that is divided by the combustion surface of the burner device 2a, the combustion surface of the burner device 2b, and the combustion surface of the burner device 2c. Has a combustion surface. In other words, a divided combustion surface is formed that is divided by the combustion surfaces of the burner devices 2a, 2b, and 2c, and each time the combustion capacity required of the burner device 2 for hot water supply increases in the heat source device. Combustion control means (not shown in FIG. 1) is provided to selectively and sequentially burn the sectioned combustion surfaces in a predetermined order (in the order of burner devices 2a, 2b, 2c). On the lower side of the hot water supply burner device 2 and the heating burner device 5, a combustion fan 15 for supplying and exhausting these burner devices 2 and 5 is provided.

  Further, the combustion chamber 100 is provided with a combined heat exchanger 1 for hot water supply and heating above the burner device 2 for hot water supply and the burner device 5 for heating, and this combined heat exchanger 1 is shown in FIG. 2, a kind of pipe arrangement part (a kind of channel arrangement part) 111 in which only the liquid circulation pipe 13 for hot water forming the main hot water supply heat exchanger is arranged, and hot water supply Type liquid pipes 13 arranged in contact with each other in such a manner that the liquid liquid pipe lines 13 are vertically sandwiched by the heating liquid flow pipes 12 forming the main heating heat exchanger (see FIG. 2). An arrangement portion 112 is provided, and the two-type pipe arrangement portion (two-type flow arrangement portion) 112 and the one-type pipe arrangement portion 111 are arranged adjacent to each other.

  As described above, in the present embodiment, the two-type pipe disposition portion 112 of the composite heat exchanger 1 is connected to the liquid flow line 13 of the main hot water supply heat exchanger, and the liquid flow line 12 of the main heating heat exchanger. Thus, the two-type pipe arrangement portion 112 having this arrangement is formed as a part of the composite heat exchanger 1. A heating burner device 5 for heating the second-type pipe arrangement section 112 is provided below the second-type pipe arrangement section 112, and the liquid circulation pipe of the second-type pipe arrangement section 112 is provided. Reference numerals 12 and 13 are configured to be heated by a common (one) burner device (heating burner device 5).

  On the other hand, a burner device 2 for hot water supply for heating the one-type pipe arrangement part 111 is arranged on the lower side of the one-type pipe arrangement part 111, but as shown in FIG. In a mode in which the liquid circulation pipes 12 and 13 arranged on a part of the two-type pipe arrangement part 112 adjacent to the one-type pipe arrangement part 111 protrude above the hot water supply burner device 2. It is arranged.

  In this embodiment, with this configuration, even when only the heating burner device 5 is combusted, even if the combustion gas of the heating burner device 5 spreads to the kind of pipe arrangement portion 111 side, the expanded portion is used for hot water supply. Since the liquid circulation pipes 12 and 13 of the two-type pipe arrangement portion 112 arranged in a manner protruding from the upper side of the burner device 2 are arranged, it is this that the heated combustion gas is heated. It becomes the liquid circulation pipes 12 and 13 of the two-type pipe arrangement portion 112.

  Further, since the two-type pipe arrangement section 112 is arranged in such a manner that the hot water liquid circulation pipe 13 is sandwiched between the heating liquid circulation pipe 12 and the combustion of the burner device 5 for heating. Heated by the spread of the gas is a heating liquid circulation pipe 12 disposed below the liquid circulation pipe 13 for hot water supply. Accordingly, it is possible to prevent the hot water supply liquid circulation conduit 13 disposed on the one-type conduit disposition portion 111 side from being heated by the heating burner device 5 during the single heating operation. It is possible to suppress boiling of a heat medium such as water remaining in the hot water supply liquid circulation pipe 13 arranged on the arrangement section 111 side.

  The composite heat exchanger 1 has fins 43. The fins 43 are provided so as to rise above the hot water burner device 2 and the heating burner device 5, and are perpendicular to the paper surface of FIG. 2 (in the left-right direction in FIG. 1), a plurality of them are arranged at intervals, and as shown in FIG. 2, the surface direction of each fin 43 is an arrangement of burner devices 2a, 2b, 2c for hot water supply. The direction is orthogonal (or substantially orthogonal) to the direction. Both the liquid flow pipe 13 of the one-type pipe arrangement portion 111 and the liquid flow pipes 12 and 13 of the two-type pipe arrangement portion 112 are inserted into the corresponding fins 43 formed in the common fins 43. It is inserted into the holes 103 and 104 (the liquid circulation pipe 13 is inserted into the pipe insertion hole 103 and the liquid circulation pipe 12 is inserted into the pipe insertion hole 104), and the composite heat exchanger 1 is configured in this manner. Once formed, it is very easy to manufacture.

  Further, in the two-type pipe arrangement portion 112, the middle pipe line among the three pipe lines (heating liquid circulation pipe 12 and hot water supply liquid circulation pipe 13) arranged in the vertical direction is used. The following effects can be obtained by using the liquid circulation pipe 13 into which low-temperature water is introduced. In other words, the heat absorption amount of the heating liquid circulation pipe 12 and the liquid flow for hot water supply are determined depending on the arrangement of the liquid circulation pipe 12 for heating and the liquid circulation pipe 13 for hot water supply in the two-type pipe arrangement portion 112. A difference arises in the amount of heat absorption on the side of the pipe 13, and in the two-type pipe arrangement portion 112, the middle pipe in the vertical direction is provided as a liquid supply pipe 13 for hot water supply so as to be in contact with each other. The configuration is such that the amount of heat absorbed per one liquid circulation conduit 13 can be increased.

  Since FIG. 1 is a system diagram, it is shown to be different from the aspect of FIG. 2, but actually, a kind of the pipe arrangement portion 111 is in an aspect like the cross-sectional configuration diagram shown in FIG. 2. The liquid circulation pipes 13 and the liquid circulation pipes 12 and 13 of the second-type pipe arrangement portion 112 are arranged. However, since FIG. 2 is also a schematic configuration diagram, the number and the like of the liquid circulation pipes 12 and 13 are not always accurately shown, and the number and arrangement of the liquid circulation pipes 12 and 13 are not necessarily shown. The interval and the like are not limited to those shown in FIG. 1, but are set as appropriate.

  In the present embodiment, a hot water supply heat exchanger 4 for recovering latent heat for recovering the latent heat of the combustion gas of the burner devices 2 and 5 is connected to the liquid flow line 13 for hot water supply forming the main hot water supply heat exchanger. A heating heat exchanger 6 for recovering latent heat for recovering the latent heat of the combustion gas of the burner devices 2 and 5 is connected to the heating liquid circulation line 12 forming the main heating heat exchanger. ing. The hot water supply heat exchanger 4 and the heating heat exchanger 6 for recovering latent heat are used for the burner apparatuses 2 and 5 by a heat medium (water in this case) that passes through the liquid flow pipes forming the respective heat exchangers. Although it recovers the latent heat of the combustion gas, the hot water supply heat exchanger 4 and the heating heat exchanger 6 for recovering the latent heat both recover not only the latent heat of the combustion gas of the burner devices 2 and 5 but also the sensible heat. It is.

  Further, both the hot water supply heat exchanger 4 for recovering latent heat and the heating heat exchanger 6 for recovering latent heat are disposed on the upper side of the composite heat exchanger 1, and the hot water supply heat exchanger 4 for recovering latent heat is disposed. A partition 115 is provided on the upper side of the composite heat exchanger 1 to partition the space and the space in which the heating heat exchanger 6 for collecting latent heat is disposed. By this partition 115, the combustion gas (exhaust gas) of the burner device 5 for heating passes through the installation space of the heating heat exchanger 6 for recovering latent heat after passing through the composite heat exchanger 1, and then for recovering latent heat. The hot water supply heat exchanger 4 is disposed through the installation space and discharged from the exhaust port 116. That is, the heating heat exchanger 6 for recovering latent heat is disposed upstream of the flow of the combustion gas of the burner device 5 for heating that has passed through the composite heat exchanger 1, and is used for recovering latent heat at the downstream side of the flow. A hot water supply heat exchanger 4 is provided.

  With such a configuration, the combustion gas at the time of combustion of the heating burner device 5 passes through the composite heat exchanger 1 and is disposed in the heating heat exchanger 6 for recovering latent heat at about 160 to about 250 ° C. Since the latent heat is recovered and cooled through the hot water supply heat exchanger 4 for the latent heat recovery, the latent heat is passed through the region where the heat exchanger 4 is disposed. The boiling of water in the hot water supply heat exchanger 4 can be suppressed. The heating heat exchanger 6 for recovering latent heat is disposed on the upper side of the hot water supply heat exchanger 4 for recovering latent heat via a partition 115, and is used when the burner device 2 for hot water supply is singly combusted. However, the boiling of water in the heating heat exchanger 6 for recovering latent heat can be suppressed.

  Since FIG. 1 and FIG. 8 to be described later are system diagrams, the arrangement configuration of the hot water supply heat exchanger 4 for recovering latent heat and the heating heat exchanger 6 for recovering latent heat is also different from the mode of FIG. Actually, a hot water supply heat exchanger 4 for recovering latent heat, a heat exchanger 6 for heating for recovering latent heat, and the like are arranged in a manner similar to the schematic cross-sectional configuration shown in FIG. Has been. However, the number and arrangement interval of the hot water supply heat exchanger 4 for recovering latent heat and the heating heat exchanger 6 for recovering latent heat are not limited to those shown in FIG. is there.

  As shown in FIGS. 4 (a) and 4 (b), in this embodiment, the hot water supply burner device 2 (2a, 2b, 2c) has a plurality of flame openings 110 arranged in the longitudinal direction. A plurality of burners 107 having a combustion surface formed by arranging one or more flame mouth rows (here, one row) are arranged in a manner of being arranged in a direction perpendicular to the flame mouth row. The burner device 2a is formed by four burners 107, the burner device 2b is formed by three burners 107, and the burner device 2c is formed by six burners 107. Therefore, the respective burner devices 2a, 2b , 2c, the area ratio of the divided combustion surfaces is approximately 4: 3: 6. The heating burner device 5 is formed by arranging nine burners 109 in which flame ports 110 are arranged in the same direction as the burner 107 forming the hot water supply burner device 2.

  Fuel gas is supplied to the hot-water supply burner device 2 and the heating burner device 5 through the gas supply passage 16 shown in FIG. 1, and reference numerals 14 and 17 in FIG. An electromagnetic valve, 18 indicates a gas proportional valve.

  Further, as can be seen by referring to FIG. 4 and FIG. 2 together, the composite heat exchanger provided above each combustion surface of the hot water supply burner device 2 (2a, 2b, 2c) and the heating burner device 5 The liquid flow line 13 for hot water supply 1 and the liquid flow line 12 for heating of the composite heat exchanger 1 are disposed on the lower side of the liquid flow lines 12 and 13 for the corresponding heating. The burner device 5 and the hot water supply burner device 2 (2a, 2b, 2c) are provided with pipe portions extending in parallel or substantially parallel to the rows of the flame ports 110. The liquid flow conduits of the hot water supply heat exchanger 4 for recovering latent heat and the heating heat exchanger 6 for recovering latent heat also have conduit portions extending in parallel or substantially parallel to the rows of the flame ports 110 of the burner devices 2 and 5. The liquid flow conduits of the hot water supply heat exchanger 4 for collecting latent heat and the heating heat exchanger 6 for recovering latent heat are arranged on the upper surface side of both burner devices 2 and 5 as a whole. It is installed.

  FIG. 11 schematically shows the structure of a heat source device having a composite heat exchanger proposed in Patent Document 2, in which a burner device for hot water supply is shown. 2 and a burner device 102 for bathing the bath. On the upper side of the hot water supply burner device 2 and the reheating burner device 102, a combined heat exchanger 101 for hot water supply and reheating is provided. A combustion fan 15 for supplying and exhausting the burner device is provided below the burner device 102.

  The composite heat exchanger 101 has fins 43 provided so as to extend over the upper side of the hot water supply burner device 2 and the upper side of the reheating burner device 102. The fins 43 are perpendicular to the paper surface. A plurality of elements are arranged in the same direction at intervals. Pipe insertion holes 103 and 113 are formed in the respective fins 43, and in a form penetrating through the respective pipe insertion holes 103 and 113, a hot water supply liquid flow line (water flow line) 13 and a reheating pipe are provided. A liquid circulation conduit (water conduit) 105 is provided.

  In the heat source device having such a composite heat exchanger 101, the heat source device is compared with the case where the hot water supply heat exchanger and the reheating heat exchanger are separately formed and disposed in the heat source device. For example, as shown in FIG. 12 (a), the combustion gas of the burner apparatus 102, for example, expands during the single combustion of the burner apparatus 102, as shown in FIG. As shown by the arrow in the figure, the hot water supply liquid flow line 13 adjacent to the vicinity of the reheating liquid flow line 105 is also heated, so that it stays in the liquid flow line 13. The problem was that the water being boiled.

  Further, as shown in FIG. 12B, the combustion gas of the hot water supply burner device 2 expands during the single combustion of the hot water supply burner device 2, and as shown by the arrows in the figure, the liquid flow for hot water supply There is also a problem that the reheating liquid circulation pipe 105 adjacent to the pipe 13 is also heated, and the water staying in the liquid circulation pipe 105 is boiled. Therefore, for example, as shown in FIG. 10, the one-type pipe arrangement portion 111 is arranged at a position corresponding to the combustion surface of the hot water supply burner device 2, and the two-type pipe arrangement portion 112 is heated. A similar problem may occur if it is placed at a position corresponding to the 5 combustion surface.

  In the invention described in Patent Document 2, as shown in FIG. 11, for example, a space above the hot water supply burner device 2 and a space above the reheating burner device 102 are partitioned. A partition 106 is provided, and the partition 106 is formed, for example, by arranging the two stainless steel plates 106a and 106b to face each other with a space therebetween, and it is proposed to allow air to flow through the space. Yes. In this way, even if the volume of the combustion gas expands when the burner apparatuses 2 and 102 are individually burned, only the liquid circulation pipes 13 and 104 provided on the upper side of the burner apparatuses 2 and 102 are compatible. It is said that the gas is heated by 2,102 combustion gas so that the combustion gas does not hit the adjacent liquid circulation pipes 104,13.

  However, in the configuration in which such a partition is provided, there is a problem that the structure is complicated and the manufacturing cost is increased by providing the partition or the configuration for allowing the air to pass through. Will occur.

  On the other hand, in this embodiment, as shown in FIG. 2, a burner device for hot water supply is disposed below the one-type pipe arrangement portion 111, and below the two-type pipe arrangement portion 112. In addition, although the heating burner device 5 is disposed, the liquid circulation conduits 12 and 13 disposed on a part of the two-kind conduit disposing portion 112 on the side adjacent to the one-kind conduit disposing portion 111. However, since it is arranged in such a manner that it protrudes above the burner device 2 for hot water supply, the liquid in the one-type pipe arrangement part 111 can be provided without providing a partition as in the invention proposed in Patent Document 2. It is possible to suppress boiling of the water in the flow pipe 13.

  That is, since the volume of the combustion gas in the burner devices 2 and 5 expands when the burner devices 2 and 5 are combusted, the heating burner device 5 disposed on the lower side of the second-type pipe disposition portion 112 is independent. When the combustion gas is burned, the combustion gas spreads to the one-type pipe arrangement part 111 side, but is disposed on a part of the two-type pipe arrangement part 112 adjacent to the one-type pipe arrangement part 111. The liquid circulation pipes 12 and 13 are disposed so as to protrude to the upper side of the hot water supply burner device 2, so that the heated combustion gas is heated so that the liquid circulation pipes 12 are arranged to protrude. , 13.

  Further, since the two-type pipe arrangement section 112 is arranged in such a manner that the hot water liquid circulation pipe 13 is sandwiched between the heating liquid circulation pipe 12 and the combustion of the burner device 5 for heating. Heated by the spread of the gas is a heating liquid circulation pipe 12 disposed below the liquid circulation pipe 13 for hot water supply. Accordingly, it is possible to prevent the hot water supply liquid circulation conduit 13 disposed on the one-type conduit disposition portion 111 side from being heated by the heating burner device 5 during the single heating operation. It is possible to suppress boiling of a heat medium such as water remaining in the hot water supply liquid circulation pipe 13 arranged on the arrangement section 111 side.

  Therefore, in the heating independent operation (when the hot water supply burner device 2 is stopped and only the heating burner device 5 is combusted, and the flow of the heat medium in the hot water supply liquid flow line 13 is stopped). The burner device 5 for heating can be burned continuously, or even when intermittent operation in which the burner device 5 for heating is turned on and off at the time of heating independent operation is performed, the time of combustion off can be shortened. Therefore, the heating capacity can be improved. Further, unlike the configuration in which a partition is provided between the upper space of the heating burner device 5 and the upper space of the hot water supply burner device 2, the structure can be simplified and the number of parts can be reduced, so that the cost can be reduced. .

  In the composite heat exchanger 1 applied to the present embodiment, when only the hot water supply burner device 2 arranged on the lower side of the one-type pipe arrangement portion 111 burns, the hot water supply side burner The volume of the combustion gas of the apparatus 2 expands so that the combustion gas also spreads to the second-type pipe arrangement section 112 side, and the heating liquid circulation pipe 12 is arranged to protrude above the hot water supply burner 2. The heating liquid circulation pipe 12 adjacent to the heating liquid circulation pipe 12 disposed so as to protrude is also heated by the combustion gas of the hot water supply burner device 2.

  Therefore, the liquid heat medium staying in the heating liquid circulation pipe 12 is heated by the combustion gas of the hot water supply burner device 2, but on the second-type pipe arrangement section 112 side. Is provided with the liquid flow line 13 for hot water being sandwiched between the liquid flow lines 12 for heating, so that the water flowing through the liquid flow line 13 for hot water supplies the liquid flow line 12 for heating. Since the heat of the internal heat medium is dissipated, it is possible to prevent the heat medium staying in the heating liquid circulation pipe 12 from boiling.

  Further, the lowermost (lowermost position) passage in the two-type pipe arrangement portion 112 of the composite heat exchanger 1 is a heating liquid circulation pipe 12, and the liquid flowing through the pipe (heat medium) is: It is warm if it is in a heated and circulated state, and even if the circulation is stopped, it is in a cold state like the liquid circulation pipe 13 for hot water supply in which cold water is introduced from the water supply side. Since there is almost no, it can prevent that dew condensation arises in the liquid circulation pipe 12 of the composite heat exchanger 1. FIG.

  As shown in FIG. 1, in this embodiment, the hot water supply circuit 45 includes a hot water supply heat exchanger 4 for recovering latent heat, and a water supply passage 46 provided on the water inlet side of the hot water supply heat exchanger 4 for recovering latent heat. , A passage 34 provided on the outlet side of the hot water supply heat exchanger 4 for recovering latent heat, a liquid flow line 13 (main hot water supply heat exchanger) for hot water supply of the composite heat exchanger 1, and the composite heat exchanger 1 And a hot water supply passage 47 provided on the water outlet side of the liquid flow conduit 13 for hot water supply.

  The hot water supply circuit 45 is a liquid heat medium introduced through the water supply passage 46 and heated through the hot water supply heat exchanger 4 for recovering latent heat. In this circuit, the heated water is introduced into the hot water supply heat exchanger) and heated, and then the heated water is guided to the hot water supply destination through the hot water supply passage 47. In the hot water supply circuit 45, the water supply passage 46 is provided with a water amount sensor 19 for detecting the amount of water passing through the water supply passage 46, and the passage 34 is provided with a hot water supply high limit switch 36, so that the combined heat exchanger 1 A hot water supply pipe thermistor 151 is provided in the middle of the hot water supply liquid flow line 13.

  Further, the hot water supply passage 47 is provided with a heat exchange side thermistor 23 for detecting the temperature on the outlet side of the liquid circulation pipe 13 for hot water supply of the composite heat exchanger 1 and a hot water thermistor 24 for detecting the hot water supply temperature. ing. In this embodiment, a method is used in which the incoming water temperature is obtained by calculation without providing the incoming water temperature detecting means for detecting the incoming water temperature for hot water supply. For example, when the hot water supply burner device 2 performs stable combustion, The water temperature is calculated backward from the hot water temperature and stored. Since the heat source apparatus of a method for calculating the incoming water temperature for hot water supply by calculation is well known, the description thereof is omitted, but the incoming water temperature for hot water supply can be determined by an appropriate method.

  The hot water supply passage 47 is provided with a water amount servo 20 for variably adjusting the total amount of hot water supplied through the hot water supply circuit 45, and the hot water supply passage 47 is connected to the water supply passage 46 through the hot water supply bypass passage 22. The bypass servo 21 is provided at the connection portion between the bypass passage 22 and the water supply passage 46.

  The heating circuit 7 has a heating liquid circulation passage 8, and the heating liquid circulation passage 8 includes a heating heat exchanger 6 for recovering latent heat, a heating circulation pump (heating liquid circulation pump) 9, and the like. , A heating high temperature thermistor 40, a heating high limit switch 77, a heating water pipe thermistor 52, and a heating low temperature thermistor 41 are provided. The heating circulation pump 9 is combined with the heating heat exchanger 6 for collecting latent heat. A function of circulating a liquid heat medium (for example, water) through the heating liquid circulation pipe 12 of the heat exchanger 1 is provided.

The heating liquid circulation passage 8 has passages 59 to 65, 108, and the passage 108 does not pass the heat medium (for example, water) in the heating circuit 7 to the heating heat exchanger 6 for collecting latent heat. It functions as a latent heat heat exchange bypass passage for circulation. The heating high temperature thermistor 40 detects the temperature of the heat medium on the outlet side of the main heating heat exchanger, and the heating low temperature thermistor 41 determines the temperature of the heat medium on the inlet side of the main heating heat exchanger . It is to detect.

  The capacity of the cistern 10 is, for example, 1800 cc, and the cistern 10 is provided with a water level electrode 44 and an overflow passage 66. The cistern 10 is connected to the water supply passage 46 through the water supply electromagnetic valve 42 and the water supply passage 165.

  Further, in the present embodiment, the hot water supply circuit 45 and the heating circuit 7 are thermally connected via the hot water supply / heating thermal connection liquid-water heat exchanger 33, and the hot water supply / heating thermal connection liquid / water heat. The exchanger 33 is used for the hot water supply that forms the composite heat exchanger 1 and the hot water supply heat exchanger 4 for recovering latent heat in the hot water supply circuit 45 on the outlet side of the heating liquid circulation conduit 12 that forms the composite heat exchanger 1. It connects thermally with the liquid distribution pipe line 13 (main hot water supply heat exchanger).

  The hot water heating / heating thermal connection liquid-water heat exchanger 33 includes a hot heat medium (in this case, water) that is discharged from the heating liquid circulation pipe 12 of the composite heat exchanger 1 by driving the heating circulation pump 9. ) Is introduced and distributed as indicated by arrow B in FIG. 1, and flows from the hot water supply heat exchanger 4 for recovering latent heat in the direction opposite to arrow B (in the direction of arrow B ′) during hot water supply operation. Water is introduced and circulated in the liquid-water heat exchanger 33 for hot water supply / heating thermal connection.

  That is, the heat medium introduced into the hot water heating / heating thermal connection liquid-water heat exchanger 33 from the heating liquid circulation pipe 12 side is supplied from the hot water supply / heating heat connection liquid / water heat exchanger 33 through the water supply side outlet. The water that flows in and is introduced from the hot water supply heat exchanger 4 for recovering latent heat into the hot water heating / heating thermal connection liquid-water heat exchanger 33 passes through the heating medium outlet ( A liquid-water heat exchanger 33 for hot water supply / heating / thermal connection is formed by an opposing heat exchanger in which the water and the heat medium from the liquid circulation pipe 12 flow in opposite directions to each other. ing. For example, from the hot water supply heat exchanger 4 for recovering latent heat, a hot heat medium (hot water in this case) heated from the liquid circulation pipe 12 for heating is introduced into the liquid-water heat exchanger 33 for hot water heating / thermal connection. When hot water or water is introduced into the hot water supply / heating thermal connection liquid-water heat exchanger 33, the heating circuit side heat can be moved to the hot water supply circuit side (the hot water supply side absorbs the heating side heat).

  Note that an appropriate heating device is connected to the heating circuit 7. In this figure, heating devices 70 and 71 are connected to the heating circuit 7 via external passages 72, 73 and 74, and the heating circuit 7 has a function of supplying a heat medium to the heating devices 70 and 71. . The heating device 70 is, for example, a high-temperature heating device such as a bathroom dryer, and the heating device 70 is provided with a thermal valve 76. On the other hand, the heating device 71 is a low-temperature heating device such as a hot water mat 71 and is provided with a thermal valve 48 that selectively switches the connection between the passage in the appliance case 80 of the heating liquid circulation passage 8 and the external passage 73. The supply of the heat medium to the heating device 71 is controlled.

  In the heat source device of the present embodiment, the heating liquid circulation passage 8 of the heating circuit 7 is thermally connected to the reheating circulation passage 26 of the bath via the reheating liquid-water heat exchanger 25. . The recirculation circulation passage 26 is provided with a recirculation circulation pump 27, a bath thermistor 28, a running water switch 29, a water level sensor 30, and a bathing thermistor 31. The recirculation circulation passage 26 is connected to a bathtub through a circulation fitting 81. 75.

  In the heating liquid circulation passage 8, when heat is exchanged with the water circulating in the recirculation circulation passage 26 in the reheating liquid-water heat exchanger 25, the reheating liquid-water is supplied from the heating liquid circulation passage 8. A reheating liquid flow rate control valve 32 for controlling the flow rate of the liquid passing through the heat exchanger 25 is provided. This reheating liquid flow rate control valve 32 is a heat medium (here, water) circulating in the heating circuit 7. It functions as a heat medium introduction switching valve that switches the presence / absence of introduction to the reheating liquid-water heat exchanger 25 by opening and closing the valve.

  The reheating liquid flow control valve 32 is opened to introduce the water (hot water) to the reheating liquid-water heat exchanger 25, and the recirculation pump 27 is driven to retreat the bath. If the recirculation circulation pump 27 is stopped, heat exchange between the heat medium passing through the heating circuit 7 and the water in the recirculation circulation passage 26 is not performed (to be precise, it stays in the recirculation circulation passage 26). Some of the water is heat exchanged, but almost no heat exchange).

  In FIG. 1, reference numeral 49 is a pouring passage, reference numeral 50 is a pouring solenoid valve, reference numeral 79 is a pouring amount sensor, reference numeral 37 is a drain collecting means, reference numeral 38 is a drain passage, reference numeral 39 is a drain neutralizer. , 76 indicates a thermal valve.

  Although the remote control device is not shown in FIG. 1, the remote control device is signal-connected to the control device of the heat source device. In the following description, the remote control device is described with reference numeral 53 as appropriate. To do. Further, in homes and the like, a remote control device 53 having a hot water supply temperature setting, a reheating switch, an automatic switch (an operation switch for automatic hot water filling), etc. is provided in a kitchen or bathroom that supplies hot water, and a washroom. Remote control device 53 with a switch for performing bathroom drying (heating device) is provided in the living room, and a remote control device 53 with a floor heating (heating device) switch or the like is provided in the living room. However, in this specification, they are collectively referred to as a remote control device 53.

  In the present embodiment, the hot water supply operation is performed as follows, for example. That is, when the operation of the remote controller 53 is on, for example, when a hot water tap (not shown) provided on the front end side of the hot water supply passage 47 is opened by a user of the heat source device, the remote control device 53 is introduced from the water supply passage 46. Water is introduced into the hot water supply passage 47 through the hot water supply heat exchanger 4 for recovering latent heat and the liquid flow conduit 13 (main hot water supply heat exchanger) for hot water supply of the composite heat exchanger 1. When a predetermined hot water supply operating flow rate is reached, combustion control of the burner device 2 and rotation control of the combustion fan 15 are appropriately performed by the control means, and hot water having a preset hot water supply temperature set in the remote control device 53 is obtained. It is formed and supplied to the hot water supply destination. In addition, although the combustion of the burner apparatus 5 for heating is also performed as needed, the detailed description about this operation | movement is mentioned later.

  When the automatic switch provided in remote control device 53 is turned on, hot water having a preset hot water temperature set in remote control device 53 is formed in the same manner as in the hot water supply operation, and the hot water is poured into the hot water. By opening the solenoid valve 50, hot water filling by pouring from the hot water supply passage 47 to the bathtub 75 through the pouring passage 49 is performed.

  On the other hand, when a heating medium (liquid) is supplied from the heating liquid circulation passage 8 to the heating devices 70 and 71 without performing hot water supply (for example, by operation of a clothes dryer, bathroom heater dryer, floor heater, etc.) In the heating independent operation), the liquid (here, hot water) is circulated by driving the heating circulation pump 9, and the liquid discharged from the discharge side of the heating circulation pump 9 is the arrow A in FIG. As shown in FIG. 4, the air is introduced into the heating liquid circulation pipe 12 (main heating heat exchanger) of the composite heat exchanger 1 through the passage 59. At this time, combustion of the heating burner device 5 and rotation control of the combustion fan 15 are appropriately performed to heat the liquid.

  The liquid that has passed through the liquid flow conduit 12 for heating of the composite heat exchanger 1 is then introduced into the hot water heating / heating thermal connection liquid-water heat exchanger 33, and the hot water heating / heating thermal connection liquid-water heat. The liquid that has passed through the exchanger 33 passes through the passage 60 as indicated by the arrow C, and then branches off at the passage 64, and one of the liquids passes through, for example, the heating liquid circulation passage 8 as indicated by the arrow D. When the high-temperature side heating device 70 connected to is operated, it is supplied to the high-temperature side heating device, and after passing through the high-temperature side heating device 70, returns to the passage 61 side as shown by the arrow D ′. Come. At this time, for example, when a heating switch (SW) of a bathroom heater / dryer is turned on (ON), the corresponding thermal valve 76 in the high-temperature side heating device 70 is opened, and the inside of the high-temperature side heating device 10 In response to the signal from the control device, the forward temperature of the heating heat medium is maintained at a high temperature (for example, 80 ° C.).

  When the high temperature side heating device is not in operation, the thermal valve 76 in the high temperature side heating device 70 is closed, and the liquid passing through the passage 64 as indicated by the arrow D passes through the latent heat heat exchange bypass passage. 108, is introduced into the cistern 10, and returns to the suction side of the heating circulation pump 9 through the passage 62 as indicated by an arrow G.

  Further, for example, when the reheating switch (SW) is turned on (ON) in a bathroom, the corresponding reflowing liquid flow rate control valve 32 is opened, and the liquid (branched in the passage 64 after passing through the passage 60 ( The heat medium passes through the reheating liquid-water heat exchanger 25 as indicated by an arrow E, and passes through the passage 65 toward the passage 61 as indicated by an arrow E ′. In this way, the hot water in the bathtub is circulated in the recirculation circulation passage 26 while passing the liquid maintained at a high temperature through the reheating liquid-water heat exchanger 25, so that the reheating of the bath is appropriately performed. The liquid passing through the passage 61 returns to the suction side of the heating circulation pump 9 through the cistern 10 and the passage 62 as described above.

  Further, a passage 63 for supplying a liquid to a low-temperature side heating device 71 such as a hot water mat is also connected to the discharge side of the heating circulation pump 9. For example, floor heating is performed by a remote control device 53 in a living room. When turned ON, a liquid maintained at a low temperature for heating (for example, an outgoing temperature of 60 ° C.) is supplied to an appropriate low-temperature side heating device 71 (for example, a hot water mat) according to opening / closing of the corresponding thermal valve 48. Is done.

  Note that the temperature control when supplying the liquid to the high temperature side heating device 70, the temperature control when supplying the liquid to the low temperature side heating device 71, and the heating liquid circulation passage 8 are operated in a cold state. Appropriate controls such as the temperature control at the cold start, the control at the time of reheating of the bath, etc., such as the combustion control of the heating burner device 5 and the rotation control of the combustion fan 15, are performed. However, in the present invention, a known appropriate control method and an appropriate control method proposed in the future are applied.

  Further, in this embodiment, as shown by the solid line in FIG. 7A, the heating medium of the heating circuit 7 is exchanged with the heating devices 70 and 71 connected to the heating circuit 7 and the heat exchange for latent heat recovery. Without passing through the heater 6, the heating circulation pump 9 is driven to drive the latent heat and heat exchange bypass passage 108 and the composite heat exchanger 1. A bypass path that circulates through the exchanger 33 is formed.

  That is, when the heating medium (warm water) of the heating circuit 7 is circulated in a state where the heating devices 70 and 71 are not in operation (a state where the heating operation is not performed), the heating device that forms the composite heat exchanger 1 is used. After passing through the passages 60 and 64, the heat medium heated in the liquid circulation pipe 12 is introduced into the cistern 10 through the latent heat exchange bypass passage 108, and passes through the passage 62, the heating circulation pump 9 and the passage 59 in this order. To return to the liquid circulation passage 12.

  In FIG. 7A, the path indicated by the broken line is a path through which the heat medium does not pass in the heating circuit 7, and the path shown in FIG. 7B will be described later, but in FIG. Similarly, the path through which the heat medium passes is indicated by a solid line, and the path that does not pass is indicated by a broken line. 7 (a) and 7 (b), the heating devices 70 and 71 are shown one by one for simplification of the drawing. In the heat source device of this embodiment, the passage through which the heat medium passes through the cistern 10 is shown. In FIG. 7A and FIG. 7B, the path of the heat medium passing through the cistern 10 is schematically shown by a curve.

  FIG. 3 is a block diagram showing the control configuration of the heat source device of this embodiment. As shown in FIG. 3, the control device 54 of the heat source device includes a path switching control means 51, a combustion control means 52, Pump drive control means 55 is provided. The control device 54 includes a remote control device 53, a hot water thermistor 24, a water amount sensor (flow rate sensor) 19, a reheating liquid flow rate control valve 32, gas solenoid valves 14 and 17, a gas proportional valve 18, a combustion fan 15, and a heating circulation. The pump 9, the heating high temperature thermistor 40, the heating low temperature thermistor 41, and the heat exchange side thermistor 23 are signal-connected.

  The route switching control means 51 is configured to switch the heating circulation pump when a predetermined route switching condition is satisfied during a hot water supply single operation in which a heating medium is supplied without supplying the heat medium of the heating circuit 7 to the heating devices 70 and 71. Let the circulation path of the heat medium of the heating circuit 7 circulated by driving be a latent heat exchange route as shown by the solid line in FIG. That is, the heat medium circulation path of the heating circuit 7 is shown by the bypass path shown by the solid line in FIG. 7A and the thick solid line in FIG. 7B, as shown in FIG. 7B. A latent heat exchange route that is circulated through both the route and the route through which the heating heat exchanger 6 for collecting latent heat is passed. The driving of the heating circulation pump 9 for circulating the heat medium is controlled by the pump drive control means 55 via the combustion control means 52.

  In the present embodiment, as the route switching condition, for example, when the hot water supply request capability required at the time of a single hot water supply operation exceeds a predetermined route switching reference value, a solid line in FIG. Conditions are provided such that the heat medium is circulated through the latent heat exchange route. In the present embodiment, the route switching reference value is set to the same value as the later-described water channel arrangement portion switching reference capability given to the combustion control means 52, and this value (ability value) is the value during the hot water supply single operation. It is necessary capacity to burn all of the hot water supply burner device 2 and the heating burner device 5, and is set to, for example, 16.5. In addition, the hot water supply capability of No. 16.5 is the capability of supplying 16.5 liters of hot water at a temperature 25 ° C. higher than the water supply temperature per minute.

  On the basis of the path switching condition, the path switching control means 51 has a hot water supply request capacity exceeding, for example, 16.5 when the hot water supply is operated alone, and the combustion control means 52 connects the burner apparatus 2 for hot water supply and the burner apparatus 5 for heating. When all combustion occurs, the reheating liquid flow rate control valve 32 is opened, and the reheating liquid flow rate control valve 32 is closed otherwise (combustion control is performed when reheating bath water). The reheating liquid flow rate control valve 32 is opened by the means 52).

  When the reheating liquid flow rate control valve 32 is closed, if the heating circulation pump 9 is driven to circulate the heat medium (warm water) in the heating circuit 7, the circulation path is as shown in FIG. The length of the bypass path is short, as shown by the solid line in FIG. 1. At this time, the heat medium is, for example, about 4.8 ml / min. Flowing.

  On the other hand, the route switching control means 51, based on the route switching condition, when the value of the hot water supply request capacity exceeds the route switching reference value during the hot water supply single operation (with the burner device 2 for hot water supply during the hot water single operation) When it is necessary to burn all of the heating burner devices 5), the reheating liquid flow rate control valve 32 is opened, and the latent heat exchange route as shown by the solid line in FIG. In order to circulate the heat medium.

  Then, the heat medium (warm water) in the heating circuit 7 that circulates by driving the heating circulation pump 9, as shown by the solid lines (thin solid line and thick solid line) in FIG. In addition to passing through the bypass path indicated by the solid line in FIG. 7B, the heat medium introduced from the path 60 to the path 64 is replaced with a reheating liquid flow control valve as indicated by the thick solid line in FIG. By opening 32, it passes through the passage 64 via the reheating liquid-water heat exchanger 25, passes through the passage 61, passes through the heating heat exchanger 6 for recovering latent heat, and is introduced into the systern 10. Since it passes through the path (because it passes through both the bypass path and the path parallel to the bypass path), the circulation path of the heat medium is compared with the bypass path shown by the solid line in FIG. It will be much longer.

  Therefore, the heat medium in the heating circuit 7 flows at a large flow rate of, for example, about 9.6 ml / min, and the flow rate of the heat medium passing through the hot water supply / heating thermal connection liquid-water heat exchanger 33 increases. Further, when the heat medium of the heating circuit 7 is circulated through the path through the latent heat exchange, the heat medium circulates through the heating heat exchanger 6 for recovering latent heat, so that the heat medium is a heat exchanger for heating for recovering latent heat. 6 is heated, the temperature of the heat medium can be further increased. That is, if the heating medium of the heating circuit 7 is circulated through the latent heat exchange route, the temperature of the heating medium passing through the hot water heating / heating liquid-water heat exchanger 33 can be increased and the flow rate can be increased. The ability to increase the temperature of the hot water passing through the hot water supply circuit 45 can be improved by heat exchange between the liquid-water heat exchanger 33 and the hot water supply circuit 45, and the hot water supply capacity can be increased.

  In the present embodiment, when the heat medium (warm water) of the heating circuit 7 is circulated through the latent heat exchange route, the route switching control means 51 keeps the water circulating in the recirculation circuit 26 while it is stopped. The liquid flow control valve 32 is opened to circulate the heat medium to the heating circuit 7, and in this way, almost all heat is transferred from the heat medium of the heating circuit 7 to the recirculation circuit 26 side. In addition, the heat of the heating medium in the heating circuit 7 can be transmitted to the hot water supply side to replenish the hot water supply capacity.

  Combustion control means 52 is based on a signal (command, set temperature value, etc.) of remote control device 53, hot water thermistor 24, water amount sensor (flow rate sensor) 19, heat exchange side thermistor 23, heating high temperature thermistor 40, heating low temperature thermistor. 41, the open / close control of the gas solenoid valves 14 and 17 and the valve opening amount control of the gas proportional valve 18 are performed, and the hot water supply burner device 2 (2a, 2b, 2c) and the heating heater are controlled. The combustion control of the burner 5 is performed. Further, the combustion control means 52 performs appropriate control by driving the combustion fan 15 when the burner devices 2 and 5 are combusted, for example, by making the rotation speed correspond to the combustion amount of the burner devices 2 and 5.

  As described above, the heat source device according to the present embodiment supplies a hot water supply operation of supplying hot water at a hot water supply set temperature through the hot water supply circuit 45 and a heating medium (hot water) heated through the heating circuit 7 to the heating devices 70 and 71. The combustion control means 52 has a function of performing a heating operation in which the heat medium is circulated through the heating devices 70 and 71. During the simultaneous operation, combustion control is performed to switch the combustion surfaces of the hot water supply burner device 2 (2a, 2b, 2c) and the heating burner 5 as follows.

  That is, the combustion control means 52 is a kind of pipe arrangement part 111 when the hot water supply operation is less than a predetermined water line arrangement part switching reference ability (for example, 16.5) during the hot water operation alone. Only when the burner device 2 (2a, 2b, 2c) for hot water supply on the lower side of the combustion chamber burns and exceeds the reference ability (for example, 16.5) for switching the water channel arrangement portion, the burner device 2 for hot water supply (2a, 2b) , 2c) and the heating burner device 5 on the lower side of the second-type pipe arrangement portion 112 are burned. Further, the combustion control means 52 sequentially adds the value of the hot water supply request capability required for the hot water operation operation to the path switching control means 51.

  The combustion control of the hot water supply burner device 2 (2a, 2b, 2c) performed by the combustion control means 52 is performed in a plurality of units to form each of the hot water supply burner devices 2a, 2b, 2c as shown in FIG. The combustion surface (segmented combustion surface) divided by the burner 107 is selectively and additionally burned in a predetermined order every time the combustion capacity required for the hot water supply burner device 2 is increased by one stage. .

For example, in burner combustion in hot water supply single operation, as shown in the column of the switching stage number (1) in Table 1, the combustion surface to be burned first is the combustion surface of the four burners 107 of the hot water supply burner device 2a. is there. In Table 1, as shown in FIG. 1, the combustion surface of the hot water supply burner device 2a is A, the combustion surface of the hot water supply burner device 2b is B, and the combustion surface of the hot water supply burner device 2c is C. The combustion surface of the heating burner device 5 is indicated by D.

A hot water supply characteristic (hot water output characteristic) obtained by combustion of only the hot water supply burner device 2a is, for example, the characteristic line a _{1 in} FIG. 5 according to the hot water supply set temperature when the incoming water temperature to the hot water supply circuit 45 is 15 ° C. And hot water in a region sandwiched between the characteristic line a ₂ is possible. That is, even when only the burner device 2a for hot water supply is combusted, the hot water supply characteristic varies according to the opening amount of the gas proportional valve 18, and when the opening amount of the gas proportional valve 18 is the minimum opening degree, FIG. becomes the characteristic of the characteristic line a _1, approach the characteristic line a ₂ side of FIG. 5 as the greater the opening amount of the gas proportional valve 18, the characteristics of the characteristic lines a ₂ when the maximum opening is obtained, combustion control The means 52 controls the valve opening amount of the gas proportional valve 18 according to the hot water supply set temperature and the hot water supply flow rate, thereby proportionally controlling the supply gas amount.

When the combustion capacity corresponding to the required hot water supply capacity is further increased, the combustion control means 52 includes a total of seven burners including the four burners 107 of the burner apparatus 2a and the three burners 107 of the burner apparatus 2b. The combustion surface 107 is burned (refer to hot water single combustion, switching stage number (2) in Table 1). The hot water supply characteristic obtained by the combustion of the burner devices 2a and 2b is, for example, when the incoming water temperature to the hot water supply circuit 45 is 15 ° C., the hot water supply in the region sandwiched between the characteristic line b ₁ and the characteristic line b ₂ in FIG. Is possible.

That is, hot water characteristic obtained burner device 2a, by the combustion of 2b, in response to the amount of opening of the gas proportional valve 18, the characteristics of the characteristic line b ₁ of FIG. 5 when the minimum opening is the amount of opening of the gas proportional valve 18 next, close to the characteristic line b ₂ side of FIG. 5 as the greater the opening amount of the gas proportional valve 18, the characteristics of the characteristic line b ₂ when the maximum opening is obtained, combustion control means 52, hot water supply set The amount of gas supply is proportionally controlled by controlling the valve opening amount of the gas proportional valve 18 in accordance with the temperature and the hot water supply flow rate.

Further, when the combustion capacity corresponding to the hot water supply request capacity is further increased, the combustion control means 52 further increases the combustion surface of the four burners 107 of the burner device 2a, the three burners 107 of the burner device 2b, and the 7 of the burner device 2c. Combustion of the combustion surface combustion surface of a total of 13 burners 107 is performed (see hot water single combustion, switching stage number (3) in Table 1). Hot water characteristic obtained by the combustion of these burner unit 2a, 2b, 2c, for example entering water temperature to the hot water supply circuit 45 in the case of 15 ° C., sandwiched between the characteristic lines c ₁ and the characteristic line c ₂ in FIG. 5 Hot water supply in the area is possible.

That is, the hot water supply characteristic obtained by the combustion of the burner devices 2a, 2b, 2c corresponds to the valve opening amount of the gas proportional valve 18, and when the valve opening amount of the gas proportional valve 18 is the minimum opening, the characteristic line c _{1 in} FIG. It becomes characteristic approaches a characteristic line c ₂ side of FIG. 5 as the greater the opening amount of the gas proportional valve 18, the characteristics of the characteristic lines c ₂ at the time of maximum opening is obtained, combustion control means 52, The supply gas amount is proportionally controlled by controlling the valve opening amount of the gas proportional valve 18 in correspondence with the hot water supply set temperature and the hot water supply flow rate.

  Furthermore, the combustion control means 52, when the hot water supply independent operation, has a hot water supply burner device 2 (2a) when the combustion capacity corresponding to the hot water supply request capacity becomes equal to or higher than the water channel arrangement portion switching reference capacity (for example, 16.5). , 2b, 2c), the heating burner device 5 on the lower side of the second-type pipe disposition portion 112 is combusted (refer to hot water single combustion, number of switching stages (4) in Table 1). At this time, the combustion control means 52 applies a command to the pump drive control means 55 to drive the heating circulation pump 9.

Burner unit 2a for hot water supply, 2b, 2c and hot water characteristic obtained by the combustion of the burner unit 5 for heating, for example, when the incoming water temperature to the hot water supply circuit 45 is 15 ° C., the characteristic line d ₁ and the characteristic of FIG. 5 hot water supply in sandwiched between the line d ₂ region is possible. In other words, the hot water supply characteristics obtained by the combustion of the burner devices 2a, 2b, 2c and the heating burner device 5 correspond to the valve opening amount of the gas proportional valve 18, and when the valve opening amount of the gas proportional valve 18 is the minimum opening degree. becomes the characteristic of the characteristic line d ₁ in FIG. 5, approaches the characteristic curve d ₂ side of FIG. 5 as the greater the opening amount of the gas proportional valve 18, the characteristics of the characteristic line d ₂ when the maximum opening is obtained The combustion control means 52 controls the gas proportional valve 18 in accordance with the hot water supply set temperature and the hot water supply flow rate.

Further, even when the hot water supply is operated alone, when the burner device 5 for heating is combusted, the liquid circulation pump 9 is driven to circulate the heat medium (warm water) in the heating circuit 7 for hot water supply heating thermal connection. liquid - by through the water heat exchanger 33 to recover by the endothermic heat of the heating circuit 7 side to the hot water supply side, high in the region sandwiched between the characteristic curve d ₁ and the characteristic line d ₂ in FIG. 5 hot water Hot water can be supplied by ability.

That is, in this embodiment, all the combustion surfaces of the hot water supply burner device 2 and the heating burner device 5 are combusted to control the valve opening amount of the gas proportional valve 18, and the heating medium of the heating circuit 7. As described above, the heat on the heating circuit 7 side can be absorbed into the hot water supply side via the liquid-water heat exchanger 33 for hot water supply / heating thermal connection, and at this time, the path switching control means 51 uses the heat medium circulation path of the heating circuit 7 as a latent heat exchange path, so that heat from the heating circuit 7 side to the hot water supply circuit 45 side via the hot water heating / heating thermal connection liquid-water heat exchanger 33 is obtained. the amount of movement since it often can perform hot-water supply by the characteristic line d ₁ and the characteristic line d ₂ and a high hot water supply ability of sandwiched by the region of FIG.

  Combustion control means 52 is located on the lower side of type 2 pipe arrangement section 112 when the required combustion capacity required for the heating operation is less than a predetermined heating control switching reference capacity (for example, 7.3 kW) during heating alone operation. The nine burners 109 of the heating burner device 5 are turned on / off (on / off combustion (intermittent combustion) is repeated at predetermined on / off timings). At this time, the gas proportional valve 18 is opened. Minimize valve amount.

  On the other hand, when the required combustion capacity necessary for the heating operation is equal to or higher than the heating control switching reference capacity, the nine burners 109 of the heating burner device 5 are continuously burned. Correspondingly, the valve opening amount of the gas proportional valve 18 is controlled to proportionally control the supply gas amount.

  In the present embodiment, the combustion control means 52 has a hot water supply / heating simultaneous operation control means (not shown), and during the simultaneous operation of hot water supply and heating, the control by the hot water supply / heating simultaneous operation control means is performed as follows. . That is, the hot water and heating simultaneous operation control means prioritizes the temperature adjustment on the hot water supply side, and the heating side performs the temperature adjustment corresponding to the heating side as it is obtained by the temperature adjustment on the hot water supply side. No special action) or stand by.

  Specifically, when the required hot water supply capacity required for the heat source device (required combustion capacity necessary for hot water supply operation) is equal to or less than a predetermined simultaneous combustion surface switching reference capacity (for example, No. 4.6) for heating, Only the combustion control of the hot water supply burner device 2 is performed while the combustion of the burner device 5 is stopped, and when the hot water supply required capacity is larger than the combustion surface switching reference capacity (for example, No. 4.6) at the time of simultaneous combustion, While burning the burner device 5, the combustion control of the hot water supply burner device is performed in accordance with the hot water supply request capability.

That is, in the region shown on the characteristic line a ₁ in FIG. 6 or on the left side of the characteristic line a _1, as in the stand-by state in which the combustion of the burner device 5 for heating is not performed, performs combustion of the burner apparatus 2a, in the region shown on the right side than the characteristic lines a _1, as described below, the amount of opening of the gas solenoid valve 14, 17 and the gas proportional valve 18 in correspondence with the hot water supply required capacity Take control. For example, when the required combustion capacity first exceeds the switching reference capacity from a state smaller than the combustion surface switching reference capacity (for example, No. 4.6) at the time of simultaneous combustion, first, the nine burner devices 5 for heating are used. The combustion surface of the burner 107 is combusted (see hot water heating and simultaneous combustion in Table 1, switching stage number (1)).

In the present embodiment, since the two-type pipe disposing portion 112 is provided on the upper side of the heating burner device 5, the hot water supply side is heated by the combustion of only the heating burner device 5, and the gas proportional The capacity of the hot water supply side also changes in accordance with the valve opening amount of the valve 18. For example, when the temperature of the incoming water to the hot water supply circuit 45 is 15 ° C., the characteristic lines a ₁ and a _{2 in} FIG. The hot water supply characteristic of the area between the sides is obtained. That becomes a characteristic of the characteristic line a ₁ in Fig. 6 when the minimum opening is the amount of opening of the gas proportional valve 18, close to the characteristic line a ₂ side of FIG. 6 as the greater the opening amount of the gas proportional valve 18 the characteristics of the characteristic lines a ₂ when the maximum opening is obtained, water supply and heating simultaneous operation control means of the combustion control means 52 so as to correspond to the hot water set temperature and the hot water flow rate control valve opening degree of the gas proportional valve 18 Thus, the amount of supplied gas is proportionally controlled.

Further, the hot water supply / heating simultaneous operation control means of the combustion control means 52, when the combustion capacity required according to the hot water supply required capacity is further increased, adds the three burners 107 of the burner device 2b in addition to the burner device 5 for heating. Combustion is performed on the combustion surface of a total of twelve burners 107 and 109 (see simultaneous hot water heating / heating combustion and switching stage number (2) in Table 1). At this time, according to the valve opening amount of the gas proportional valve 18, for example, when the incoming water temperature to the hot water supply circuit 45 is 15 ° C., the characteristic line b ₁ and characteristic line b ₂ side of FIG. Hot water supply characteristics in the area between the two are obtained.

That is, when the amount of opening of the gas proportional valve 18 is minimum opening becomes properties characteristic line b ₁ of FIG. 6, close to the characteristic line b ₂ side of FIG. 6 as the greater the opening amount of the gas proportional valve 18, characteristics of the characteristic line b ₂ when the maximum opening is obtained. Therefore, the hot water and heating simultaneous operation control means of the combustion control means 52 controls the valve opening amount of the gas proportional valve 18 in accordance with the hot water supply set temperature and the hot water supply flow rate, thereby proportionally controlling the supply gas amount.

Note that the hot water supply / heating simultaneous operation control means of the combustion control means 52 changes from a state where the hot water supply request capability is larger than the combustion surface switching reference capability during simultaneous combustion to a state below the switch reference capability, and thereafter the hot water supply request capability is When the state changes from the state below the switching reference capability to a state larger than the switching reference capability, the combustion of the burner device 5 for heating is not started immediately even if the combustion surface switching reference capability at the time of simultaneous combustion is exceeded (the burner device for heating) 5 is not performed), and the additional switching reference capability set to a value larger than the combustion surface switching reference capability at the time of simultaneous combustion (for example, the capability corresponding to the characteristic line b ₁ in FIG. 6 here) When the burner device 5 for heating and the burner device 2b for hot water supply reach the ability to burn with the minimum valve opening amount of the gas proportional valve 18, the heating burner device is turned on. Combustion control is performed on the burner device 5 for heating and the burner device 2 for hot water supply.

  Then, the hot water supply / heating simultaneous operation control means of the combustion control means 52 stops the combustion of the heating burner device 5 when the hot water supply request capacity changes from a state larger than the switching reference capacity to a state below the switching reference capacity. Only combustion control of the hot water supply burner device 2 is performed (as a heating standby).

  As described above, in this embodiment, when the hot water supply request capability required for the hot water supply operation is larger than the predetermined switching reference capability by the control of the hot water supply / heating simultaneous operation control unit of the combustion control unit 52, the hot water supply request capability is set. Corresponding combustion control of the heating burner device 5 is performed or combustion control of the heating burner device 5 and the hot water supply burner device 2 is performed, so that the one-type pipe arrangement portion 111 and the two-type pipe are provided. It is possible to appropriately heat hot water at a hot water supply set temperature at an appropriate flow rate by appropriately heating the liquid flow conduit 13 for hot water supply disposed in both of the passage arrangement portions 112.

  On the other hand, when the required hot water supply capacity required for the hot water supply operation is equal to or less than the switching reference capacity, the combustion control of the burner apparatus 2 for hot water supply is only performed while the combustion of the burner apparatus 5 for heating is stopped, so The hot water supply liquid circulation pipe 13 disposed in the section 111 and the hot water supply liquid circulation pipe 13 of a part of the second type pipe arrangement section 112 adjacent to the first type pipe arrangement section 111 It is possible to supply hot water at an appropriate flow rate while heating the liquid circulation pipe 13 for hot water supply, which is appropriately heated and provided in the second-type pipe arrangement portion 112, with little heating. .

  In the present embodiment, when the required hot water supply capacity required for the hot water supply operation is equal to or less than the switching reference capacity, the heating medium in the heating circuit 7 is heated by stopping the combustion of the burner device 5 for heating. Therefore, there is a possibility that the temperature of the heat medium on the heating side will decrease, but since the user does not touch the heat medium directly on the heating side, it is difficult to feel the temperature decrease of the heat medium sensitively. Also, when the required hot water supply capacity required for the hot water supply operation is less than the switching reference capacity, for example, there is a high possibility that hot water is supplied at a small flow rate in a kitchen or a washroom, and this time may not last long. Therefore, it is considered that the simultaneous operation time of heating and hot water supply when the required hot water supply capacity is equal to or less than the switching reference capacity is shorter.

  Therefore, for example, if hot water supply is stopped when the hot water supply request capacity during the simultaneous operation (operation) of hot water supply and heating is equal to or less than the switching reference capacity, the heating burner device 5 is combusted. Therefore, it is very unlikely that the state in which the combustion of the heating burner device 5 is not performed even though the user desires the heating operation will be long, and the user's usability for the operation of the heating devices 70 and 71 is very low. Will not cause any problems.

  Further, in the present embodiment, at the time of hot water heating and simultaneous operation, after the hot water supply required capacity required for the hot water supply operation is changed from the state larger than the switching reference capacity to the switching reference capacity or less, the switching reference capacity is changed from the state below the switching reference capacity. When the state changes to a state exceeding the capacity, the heating burner device 5 is burned to reach the hot water supply burner device 2 when the additional reference capacity is set, which is set to a value larger than the switching reference capacity. Combustion control is also performed, and when the hot water supply request capability required for the hot water supply operation changes from a value larger than the switching reference capability to below the switching reference capability, the combustion of the heating burner device 5 is stopped and the hot water supply burner By performing only the combustion control of the device 2, the following effects can be obtained.

  In this embodiment, the switching means for switching the presence or absence of the supply of the heat medium from the heating circuit 7 to the heating devices 70 and 71 is formed by the heat valves 48 and 76 that open and close corresponding to the temperature of the heat medium. The opening / closing control of the valve is not performed as quickly as the electromagnetic valve, but is performed slowly, and the thermal valves 48 and 76 respond to a switching signal indicating whether or not the heating medium is supplied from the heating circuit 7 to the heating devices 70 and 71. Opening and closing operations do not follow quickly.

On the other hand, as described above, the switching reference ability for making the heating burner device 5 a reference for stopping the heating and the heating burner device 5 at the same time and the additional switching for making the heating burner device 5 resume the combustion given two different values of the reference capacity, and set to a value higher than the reference capacity switching the switching reference capacity comprises plus, when water supply and heating simultaneous operation, for heating in accordance with the these criteria ability and hot-water supply required capacity burners By stopping the apparatus 5 and restarting combustion (reignition), control adapted to the opening / closing operation of the thermal valves 48 and 76 is performed, and the heating burner apparatus 5 is frequently stopped and restarted (on / off). This can be prevented and the life of the heating burner device 5 can be extended.

  Further, the hot water supply and heating simultaneous operation control means of the combustion control means 52, when the hot water supply request capability is further increased, the burner device 5 for heating and the burner devices 2a, 2b and 2c for all hot water supply in total 22 burners 107. (See the simultaneous combustion of hot water and heating in Table 1 and the switching stage number (3)).

At this time, according to the valve opening amount of the gas proportional valve 18, for example, when the incoming water temperature to the hot water supply circuit 45 is 15 ° C., the characteristic line d ₁ and the characteristic line d ₂ side of FIG. The hot water supply characteristics in the region between are obtained. That is, when the amount of opening of the gas proportional valve 18 is minimum opening becomes properties characteristic line d ₁ in FIG. 6, close to the characteristic curve d ₂ side of FIG. 6 as the greater the opening amount of the gas proportional valve 18, characteristics characteristic line d ₂ when the maximum opening is obtained. Therefore, the combustion control means 52 proportionally controls the supply gas amount by controlling the valve opening amount of the gas proportional valve 18 in correspondence with the hot water supply set temperature and the hot water supply flow rate.

  In the characteristic line c in FIG. 6, the 22 burners 107 and 109 in total of the burner device 5 for heating and all the burner devices 2a, 2b and 2c for hot water supply were burned to the maximum (the gas proportional valve 18 In the case where combustion is performed with the opening degree being maximized), the heating liquid circulation pipe 12 absorbs all the heat of combustion of the heating burner device 5 and the heat absorption by the hot water supply liquid circulation pipe 13 is absorbed. The hot water supply characteristic when it cannot do is shown.

As can be seen by comparing the characteristic line d ₂ and the characteristic line c in FIG. 6, the burner device 2a for all of the water heater burner device 5 for heating, 2b, a total of 22 burners 107 2c by largest combustion these burner unit 5,2A, 2b, if the liquid distribution line 13 all endotherm hot water supply the heat of combustion of 2c, the ability of No.24 water heater to obtain characteristics of the characteristic line d ₂ in FIG. 6 6 is obtained, when the heating liquid circulation pipe 12 absorbs all the heat of combustion of the heating burner device 5, the characteristic indicated by the characteristic line c in FIG. 6 is obtained and the hot water supply capacity is No. 16.5 water heater. Hot water supply capacity.

  For this reason, for example, in the area within the broken line frame E in FIG. 6, the amount of heat absorbed by the heating liquid circulation pipe 12 in the heating burner device 5 during simultaneous combustion of hot water and heating. However, in this embodiment, the hot water heating / heating thermal connection liquid-water heat exchanger 33 is provided, and the heating medium (hot water) in the heating circuit 7 is used to supply the hot water heating / cooling heat connection. Such a decrease in hot water supply capability can be supplemented by performing heat transfer to the heat medium (water).

  By the way, in this embodiment, in the apparatus in which one combustion fan 15 is provided to perform the hot water supply and heating operation, the combustion fan 15 can be operated in either the hot water supply single operation or the heating single operation. To drive. Therefore, the hot water supply burner device 2 and the heating burner device 5 are arranged in parallel, a hot water supply heat exchanger is provided above the hot water supply burner device 2, and the heating burner device 5 is provided above the heating burner device 5. When the heating operation is performed while intermittently performing the hot water supply operation as a configuration in which the heat exchanger is provided, the hot water remaining in the hot water heat exchanger during the hot water supply operation stop period is cooled by the air blow from the combustion fan 15. As a result, a cold water sandwich phenomenon in which the hot water supply temperature fluctuates occurs.

  On the other hand, in the present embodiment, a kind of pipe arrangement portion 111 in which a liquid circulation pipe 13 for hot water supply is provided is provided on the upper side of the hot water supply burner apparatus 2, and is provided side by side with the hot water supply burner apparatus 2. On the upper side of the heating burner device 5, a two-type pipe arrangement section 112 arranged in contact with the heating liquid circulation pipe 12 so as to sandwich the hot water supply liquid circulation pipe 13 vertically. Because of the characteristic configuration provided with the following effects, the following effects can be obtained.

  That is, when the heating single operation is performed and the combustion fan 15 is driven along with the combustion of the heating burner device 5, the hot water staying in the liquid circulation pipe 13 of the one-type pipe arrangement portion 111 is stopped. Even if it is cooled by the wind from the combustion fan 15 thereafter, the hot water staying in the liquid circulation pipe 13 of the two-type pipe arrangement portion is heated by the combustion of the burner device 5 for heating. Warm hot water remains in the hot water supply liquid circulation line 13 forming the hot water supply heat exchanger, and the heat medium (hot water) supplied through the hot water supply circuit 45 is a kind of the pipe arrangement portion 111 and heating. Since the hot water is supplied through the second-type pipe arrangement portion 112 heated by the burner device 5 for use, the cold water sandwich phenomenon can be suppressed.

In the present embodiment, as shown in the fourth from the right side in FIG. 2 , the liquid circulation pipe 13 of the second-type pipe arrangement portion 112 protruding to the hot water supply burner device 2 side is heated. Although it is heated by the combustion gas that rises while spreading to the hot water supply burner device 2 side from the combustion surface of the burner device 5 during combustion of the burner device 5 for heating, the heat of the combustion gas is below the liquid circulation pipe 13 Since most of the heat is absorbed by the liquid circulation pipe 12 provided in contact with the liquid circulation pipe 13, the amount of heat of the combustion gas absorbed by the liquid circulation pipe 13 is not so large.

Therefore, even if the liquid circulation pipe 13 in this portion is heated by the spread of the combustion gas from the burner device 5 for heating, it is not possible to suppress the cold water sandwich phenomenon of hot water supplied by itself, but in this embodiment, The liquid circulation line 13 (the first, second, and third liquid circulation lines 13 from the right side in FIG. 2 ) disposed on the upper side of the heating burner device 5 is the combustion of the heating burner device 5. The amount of heat of the gas can be absorbed sufficiently, and warm hot water remains in these liquid circulation pipes 13, and the cold water sandwich phenomenon can be suppressed as described above.

  That is, the configuration of the present embodiment can suppress the boiling of the liquid (water) in the liquid circulation pipe 13 on the hot water supply side during the heating single operation and can efficiently operate the hot water operation. It is also possible to suppress the cold water sandwich phenomenon, which is a concern when heating operation is performed.

  As in the heat source device shown in FIG. 11, a hot water supply burner device 2 and a bath reheating burner device 102 are juxtaposed, and a hot water supply liquid circulation pipe is provided above the hot water supply burner device 2. Even in the case where the passage 13 is provided and the reheating liquid circulation pipe 105 is provided on the upper side of the reheating burner device 102 and the combustion fan is provided on each of the hot water supply side and the reheating side, both of them are provided. The combustion fan is driven both when the hot water supply is operated alone and when it is driven alone. However, in this case, since the combustion fan on the side where the combustion is not performed is for preventing the backflow of the combustion gas, the amount of blown air is small.

  That is, by the air blow for preventing the backflow of the combustion gas, the hot water temperature in the heat exchanger on the side where the combustion is not performed is not greatly lowered, but two combustion fans as shown in FIG. 15 is less likely to cause a cold water sandwich phenomenon. However, as described above, if a partition or the like is not provided, the water in the heat exchanger on the non-burning side can be used for hot water supply or reheating alone combustion. This will cause a problem such as boiling.

  On the other hand, the heat source device of the present embodiment can prevent such a problem of boiling of a heat medium such as water, and can also suppress the cold water sandwich phenomenon as described above, so that hot water supply can be performed even during hot water supply single operation. It is an excellent heat source device that can stabilize the hot water supply temperature even during the simultaneous operation of heating, and can be reduced in cost because of its simple configuration.

  FIG. 8 shows a system configuration of a second embodiment of the heat source apparatus according to the present invention, and the second embodiment will be described below. In the description of the second embodiment, the same reference numerals are assigned to the same name portions as those in the first embodiment, and the duplicate description is omitted or simplified.

  In the second embodiment, as shown in FIG. 8, the hot water heating / heating system provided on the inlet side of the liquid flow line 13 (main hot water supply heat exchanger) of the composite heat exchanger 1 in the first embodiment is used. The connection liquid-water heat exchanger 33 is provided on the outlet side of the hot water supply liquid flow line 13 (main hot water supply heat exchanger) forming the composite heat exchanger 1. Other configurations of the second embodiment are the same as those of the first embodiment, and the second embodiment can achieve the same effects as those of the first embodiment.

  Note that the present invention is not limited to the above-described embodiments, and can take various forms without departing from the technical scope of the present invention. For example, in each of the above embodiments, the control configuration as shown in FIG. 3 is provided, but the control configuration in the heat source device of the present invention is not particularly limited, and is appropriately set.

  For example, in each of the above-described embodiments, the route switching reference value serving as the route switching reference by the route switching control unit 51 is set to, for example, 16.5, which is the same value as the water channel arrangement unit switching reference capability given to the combustion control unit 52. However, when the route switching reference value is set to a value larger than the water channel switching reference value and the value of the hot water supply request capability during the hot water supply single operation is less than or equal to the route switching reference value, the route switching control means 51 in FIG. The heat medium may be circulated through the bypass path indicated by the solid line, and when the path switching reference value is exceeded, the heat medium may be circulated through the latent heat exchange path indicated by the solid line in FIG.

  In this way, even if the required hot water supply capacity during hot water supply independent operation is 16.5 or higher, the amount of heat required for 16.5 or higher is less (the hot water required capacity is 16.5 than the route switching standard). By circulating the heat medium in the bypass route, the load of the heating circulation pump 9 can be reduced to save energy, and the required hot water supply capacity becomes larger than the route switching reference value. When a higher hot water supply capability is required, it is possible to perform hot water supply with the higher hot water supply capability.

  In addition, the heat source apparatus of the present invention does not necessarily have the composite heat exchanger 1 as shown in FIG. 2, but has an aspect having only the two-type pipe arrangement portion 112 as shown in FIG. 9, for example. It can also be. Thus, in the heat source device of the present invention, the liquid flow conduit of the main hot water supply heat exchanger is the main, like the two-type conduit arrangement portion 112 of the composite heat exchanger 1 applied to each of the above embodiments. It has at least a part of a two-type pipe arrangement part 112 arranged in contact with each other in a form sandwiched between the liquid circulation pipes of the heat exchanger for heating. It suffices that the seed liquid flow pipes 12 and 13 have a configuration in which they are heated by a common burner device.

  In the case of the configuration as shown in FIG. 9, the burner device can be formed by providing, for example, one burner device having a plurality of switchable combustion surfaces, and FIG. A state in which one is burning is schematically shown. Further, the system configuration in the case of having a heat exchanger configured as shown in FIG. 9 is such that, for example, the heating liquid flow channel 12 of the composite heat exchanger 1 in FIGS. 1 and 8 is a hot water supply liquid flow channel. It becomes an aspect over the entire arrangement position of 13.

  Furthermore, the heat source device of the present invention is formed, for example, in a configuration as shown in FIGS. 1 and 8, and includes a liquid-water heat exchanger 33 for hot water heating / heating thermal connection and a hot water supply circuit 45. If the heating circuit 7 is thermally connected, and when the hot water supply single operation is performed, the circulation path switching of the heating medium of the heating circuit 7 by the path switching control means 51 can be performed as in each of the above embodiments. The details are not particularly limited and are appropriately set. For example, in each of the above-described embodiments, the method of calculating the incoming water temperature without using the incoming water temperature detecting means for detecting the incoming water temperature of the hot water supply is applied, but the incoming water temperature detecting means for detecting the incoming water temperature in real time is provided. Also good.

  Moreover, you may have other functions, such as the heat collection function which collects solar heat, and structures, such as a hot water tank.

  Further, as shown by the chain line in FIG. 1 and FIG. 8, when the heating devices 70 and 71 are not operated (operated), the heating medium heated by the heating heat exchanger 28 (28a and 28b) is heated. A bypass passage 119 that returns to the entrance side of the heating heat exchanger 28a without passing through the devices 70 and 71 is provided, and a bypass valve 117 is provided in the bypass passage 119. Instead of performing the opening / closing operation control of the reheating liquid flow rate control valve 32 in each of the above embodiments based on the switching condition (or in addition to the opening / closing operation control of the reheating liquid flow rate control valve 32), the bypass valve The opening / closing operation control 117 may be performed.

  Furthermore, the heat source device of the present invention may be provided with a burner device for oil combustion instead of the burner device that performs gas combustion provided in each of the above embodiments, for example.

  Since the present invention can sufficiently obtain hot water supply and heating capabilities even in a small size and can suppress boiling of the heat medium in the heat exchanger during single operation of hot water supply or heating, it can be used as a heat source device for home use or business use. Available.

DESCRIPTION OF SYMBOLS 1 Heat source device 2 Burner device for hot water supply 4 Hot water supply heat exchanger for latent heat recovery 5 Burner device for heating 6 Heat exchanger for heating for latent heat recovery 7 Heating circuit 8 Liquid circulation passage for heating 9 Circulating pump for heating 10 Systurn 12, 13 Liquid distribution pipes 14, 17 Gas solenoid valve 15 Combustion fan 18 Gas proportional valve 19 Water volume sensor 20 Water volume servo 24 Hot water thermistor 23 Heat exchanger side thermistor 25 Bath heat exchanger 32 Reheating liquid flow control valve 33 Hot water supply Liquid-water heat exchanger for heating connection 40 Heating high temperature thermistor 41 Heating low temperature thermistor 51 Path switching control means 52 Combustion control means 53 Remote control device 54 Control means 55 Pump drive control means 111 Type 1 pipe arrangement part 112 Type 2 pipe arrangement Department

Claims (4)

  A hot water supply heat exchanger, a hot water supply circuit having a function of heating water, which is a liquid heat medium by the hot water supply heat exchanger, and supplying hot water to a hot water supply destination, a heating heat exchanger, and a liquid through the heating heat exchanger And a heating circuit connected to the heating device, wherein the hot water supply heat exchanger is a combustion gas of the burner device by a liquid flow line forming the hot water supply heat exchanger. A main hot water supply heat exchanger that recovers the sensible heat of the boiler and a hot water supply heat exchanger for recovering the latent heat of the combustion gas, and the heating heat exchanger forms the heating heat exchanger A main heating heat exchanger for recovering the sensible heat of the combustion gas of the burner device and a heating heat exchanger for recovering the latent heat of the combustion gas, wherein the main hot water supply The liquid flow line of the heat exchanger is the main heating heat. Two kinds of liquid circulation pipes having at least a part of the two kinds of pipe arrangement portions arranged so as to be in contact with each other in a manner sandwiched between the liquid circulation pipes of the exchanger. It has a composite heat exchanger whose path is heated by a common burner device, and the outlet side of the main heating heat exchanger is the hot water supply heat exchanger for recovering latent heat and the main hot water supply heat exchanger And a hot water supply heating / heating liquid-water heat exchanger that is thermally connected to either the main hot water supply heat exchanger or the outlet side of the main hot water supply heat exchanger. A latent heat heat exchange bypass passage is provided for circulation without passing through the recovery heating heat exchanger, and the latent heat heat exchange bypass passage and the main heating heat passage are driven by the heating circulation pump. It is circulated through the heat exchanger and the hot water heating / heating liquid-water heat exchanger. A bypass path is formed, and when a predetermined path switching condition is satisfied during a hot water supply single operation in which a hot water supply operation is performed without supplying the heating medium of the heating circuit to the heating device, the heating circulation pump A path switching control unit configured to circulate the heat medium circulation path of the heating circuit by driving through both the bypass path and the path through the heating heat exchanger for recovering latent heat to circulate through both paths. A heat source device provided.   The route switching condition is characterized in that the hot water supply requesting capability required during a hot water supply single operation in which a hot water supply operation is performed without supplying a heat medium to the heating device exceeds a predetermined route switching reference value. The heat source device according to claim 1. A recirculation circuit connected to the bathtub and having a function of circulating the water in the bathtub, and the water circulation line of the recirculation circuit is connected to the heating circuit via the reheating liquid-water heat exchanger. liquid distribution line and are thermally connected, the reheating for liquid heat medium in the heating circuit for circulating the heating circuit - switched by switching the presence or absence of the valve introduction into the water heat exchanger heat A medium introduction switching valve is provided, and when the heat medium in the heating circuit is circulated through a latent heat exchange route, the heat medium introduction is performed by the route switching control means while the water circulation operation is stopped in the recirculation circuit. The heat source device according to claim 1 or 2, wherein a switching valve is opened to circulate through the heating medium to the heating circuit through the reheating liquid-water heat exchanger.   4. A water amount servo for variably adjusting the total amount of hot water supplied through the hot water supply circuit is provided in the hot water supply circuit. The heat source device described in one.

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