JP2013185738A - Heat source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat source device capable of maintaining the lifting range of a pump in an appropriate range and causing no significant increase in costs, even when a heating circuit is elongated and water conduction resistance or a water conduction amount is increased.SOLUTION: A heat source device 1 includes: a heat source machine body 3 having a casing 9; and a high-temperature terminal circuit 32 that can conduct water to a high-temperature heating terminal 14 and a low-temperature terminal circuit 33 that can conduct water to a low-temperature heating terminal, both circuits arranged over the inside and the outside of the heat source main unit 3. The heat source main unit 3 includes a low-temperature heating thermally operated valve 38 that regulates water conduction to the low-temperature heating terminal, and a control device 2. An external thermally operated valve 8 and an external pump 7 arranged in the high-temperature terminal circuit 32 are disposed outside the heating source main unit 3. The control device 2 is provided with a predetermined number of terminals 17 for a thermally operated valve for outputting signals or power to open/close the low-temperature heating thermally operated valve 38. The external thermally operated valve 8 and the external pump 7 are controlled via any of terminals 17 for the thermally operated valve in the above terminals 17.

Description

  The present invention relates to a heat source device including a combustion system for heating.

  Conventionally, combined heat source devices that can perform heating operation in addition to hot water supply operation have been widely used. And as a heating terminal which contributes to heating operation, there exist high temperature heating terminals, such as a fan convector and a panel heater, and low temperature heating terminals, such as a floor heating apparatus (for example, patent document 1). That is, this type of heat source device includes a heat exchanger that heats hot water or a heat medium (hereinafter simply referred to as hot water), and a heating circuit that is a series of flow paths that connect the heat exchanger and the heating terminal. Heating operation is performed by generating water flow. More specifically, a circulation pump is usually provided inside the housing of the heat source device, and a water flow is formed in the heating circuit by driving the circulation pump.

  By the way, in cold districts such as Hokkaido, there are cases where more panel heaters are installed than usual when the number of rooms in the building is large or the area per room is large. In particular, when the number of installed panel heaters is increased because of the number of rooms, the heating circuit tends to be longer. In addition, there is a concern that water resistance and the amount of water flow may increase significantly as the heating circuit becomes longer. In such a case, there has been a problem that the head of the circulation pump already provided is insufficient, a water flow is hardly formed in the heating circuit, and the heating capacity is significantly reduced.

Therefore, in order to solve the above problem, it is considered to replace the circulation pump provided in the housing of the heat source device with another new pump having a large capacity. That is, it is a policy to replace the existing pump with a larger circulation pump.
However, changing the standard of such a device usually changes not only the replacement of that device, but also changes to the layout of other devices in the housing, which increases labor and greatly increases manufacturing costs. There is dissatisfaction that leads to an increase. Moreover, if it is replaced with a uniformly large circulation pump, the quality may become excessive depending on the use situation, and there is a possibility of causing unnecessary cost increase.

  Therefore, an additional circulation pump (hereinafter referred to as an external pump) is provided in a heating circuit formed outside the housing of the heat source device, and the external pump is connected in series with an existing circulation pump (hereinafter referred to as an internal pump). Measures are taken into account. Thereby, the head of a pump can be raised, without changing the layout of the apparatus etc. in a housing | casing. As a result, it is possible to fully exhibit the original heating capacity while avoiding an increase in manufacturing cost due to the layout change.

JP 2004-44915 A

However, when an external pump is newly provided, an auxiliary control device for controlling the external pump is newly required, which may cause a significant increase in manufacturing cost. In other words, this is a problem caused by the fact that existing control devices are usually not provided with spare terminals that are supposed to be added.
In addition, when such an auxiliary control device is provided, it is basically an option and increases costs, so that there is a high need for improvement from the market point of view.

  Therefore, in the present invention, in view of the problems of the prior art, even if the heating circuit is lengthened and the water flow resistance and the water flow amount increase, the pump lift force can be maintained in an appropriate range. Furthermore, it is an object to provide a heat source device that does not cause a significant increase in cost.

  The invention according to claim 1, which is proposed to solve the above problem, drives the main pump with a heat source machine main body in which the heating unit and the main pump are built in the housing, hot water or a heat medium heated by the heating unit. A predetermined number of terminals for outputting a heating circuit that can pass water to the external heating terminal, a liquid valve that regulates water flow in the heating circuit, and a signal that opens and closes the liquid valve or power that opens and closes the liquid valve A heat source device including a control device provided, the heat source device is located outside the heat source machine body, and has an external pump provided between a heating unit in the heating circuit and an external heating terminal, the control device, The heat source device is characterized in that the operation of the external pump can be controlled via any one of the predetermined number of terminals.

Here, in a situation where heating is performed using an external heating terminal, hot water or a heat medium (hereinafter simply referred to as hot water) circulates in the heating circuit. That is, during heating, the main pump is driven and the liquid valve is opened. Based on this situation, there is no problem in control and it is reasonable to drive a newly installed external pump using a signal transmitted to the liquid valve or output electric power.
Therefore, the heat source device of the present invention is newly provided via any one of the valve terminals of a predetermined number of terminals (hereinafter referred to as valve terminals) used for the liquid valve provided in the control device. The operation of the external pump is controlled. That is, according to the present invention, even when there is a shortage of unused terminals in the control device, the existing valve terminals can be used effectively without providing new terminals, This is a configuration that enables operation of the pump. Specifically, if there are any unused valve terminals that are unused, use them as external pump terminals, and if all the existing valve terminals are in use or planned to be used, One of the valve terminals is used exclusively for the external pump or as a terminal shared with the external pump. That is, when all existing valve terminals are used or are scheduled to be used, either one of the valve terminals is not used as a liquid valve but is used as an external pump, or is transmitted from one valve terminal. Signal or output power is shared by both the liquid valve and the external pump.

Thus, by effectively utilizing the existing valve terminals, it is possible to secure a certain head or more in the heating circuit without requiring a new control device. Therefore, according to the present invention, as described above, the heating circuit is extended for a reason such as the number of installed external heating terminals is larger than usual, and the water flow resistance and the water flow amount increase. Even when the situation occurs, the pump head in the heating circuit does not become insufficient, and the normal heating capacity can be sufficiently exhibited.
Further, in the present invention, by using the valve terminal of the existing control device for the external pump, there is no need to adjust the control between the control devices, and new installation of the external pump becomes easy. In addition, the external pump can be controlled at an appropriate timing.

  According to a second aspect of the present invention, the control device includes a switching unit that can change a control target from preset electrical equipment, and is controlled via the terminal by operating the switching unit. The heat source device according to claim 1, wherein the control target can be changed from a liquid valve that is an original control target to an external pump.

  According to such a configuration, since the control target of the valve terminal of the control device can be switched to another electric device by the switching means, an appropriate control environment can be easily formed according to the installation site. .

  The invention according to claim 3 includes an auxiliary power supply circuit that outputs current from a commercial power supply, and the auxiliary power supply circuit includes switch means for intermittently supplying current, and the switch means is output from the terminal. 3. The heat source device according to claim 1, wherein a current output to the external pump is intermittently generated by using a signal or power as a start / stop signal. 4.

  According to such a configuration, the auxiliary power supply circuit and the external pump can be electrically connected, and the external pump can be energized via the auxiliary power supply circuit, so that the electric power required to drive the external pump may be insufficient. There is no. That is, according to the present invention, even when the power supply capacity of the control device has already reached the upper limit due to the supply of power to other devices, etc., the power required for driving the external pump cannot be sufficiently supplied. By supplying a signal or power from the control device to the auxiliary power supply circuit, the external pump can be energized from the commercial power supply, so that the external pump can be driven reliably and controlled at an appropriate timing set in the control device. can do.

As described above, in cold districts, more external heating terminals may be installed than usual, and in that case, the heating circuit tends to be longer. In particular, increasing the distance of the heating circuit in a cold region often involves installation of a high-temperature heating terminal such as a panel heater.
Therefore, in the invention according to claim 4, the external heating terminal includes a high-temperature heating terminal through which high-temperature hot water or a heat medium flows, and the external pump is arranged between the heating unit and the high-temperature heating terminal. It is set as the heat-source apparatus in any one of Claims 1-3 characterized by the above-mentioned.

  According to such a configuration, since the external pump is arranged between the heating unit and the high temperature heating terminal, in the heating operation performed by passing water through the high temperature heating terminal (hereinafter simply referred to as high temperature heating operation), It is possible to reliably prevent a decrease in heating capacity due to the decrease.

Generally, the control device includes a valve terminal (hereinafter referred to as a low heating terminal) that contributes to open / close control of a low temperature side thermal valve that regulates water flow to a low temperature heating terminal (external heating terminal) such as floor heating equipment. Multiple). And generally, if it is a floor heating apparatus, when installing a floor warm panel to the maximum, all the terminals for low heating will be used. In other words, when the floor warming panel is not installed to the maximum, there is an unused low heating terminal in the control device. In addition, even if the floor heating panel is installed to the maximum extent, not all low heating terminals are used for the low-temperature side thermal valve, and even if one of the low heating terminals is diverted to another device In principle, there is almost no influence on the heating effect experienced by consumers.
For this reason, the invention according to claim 5 is characterized in that the heat source machine main body is provided with a low temperature side discharge port for discharging hot water or heat medium having a temperature lower than that of the high temperature hot water or heat medium, and the terminal. Is a terminal for outputting a signal for opening / closing a liquid valve for intermittently flowing the flow of the low-temperature hot water or the heat medium discharged from the low-temperature side discharge port or power for opening / closing the liquid valve. Item 4. The heat source device according to item 4.

  According to such a configuration, since the terminal used for the liquid valve provided at the low temperature side discharge port is used as a terminal that contributes to the start / stop of the external pump, it almost affects the feeling of use of the heat source device. There is nothing. ADVANTAGE OF THE INVENTION According to this invention, the head of the pump provided in the heating circuit can be improved, without impairing the function of the heat source apparatus provided conventionally.

  Invention of Claim 6 has a heat source machine main body which has a heat exchanger for baths, and the hot water or heat medium heated with the heating part passes to the primary side of the heat exchanger for baths, On the secondary side of the bath heat exchanger, hot water in the bathtub passes and is located outside the main body of the heat source, and between the heating unit in the heating circuit and the external heating terminal, A liquid valve is provided, and the control device controls opening / closing of the external liquid valve via a different terminal from the predetermined number of terminals that contributes to the operation control of the external pump. The heat source device according to claim 1, wherein the heat source device is performed.

According to such a configuration, the external liquid valve is provided on the downstream side of the external pump, and the external liquid valve can be closed as necessary, so that the hot water in the bathtub distributed to the reheating circuit is heated. In the case of (running operation), it is possible to intentionally prevent water from flowing to the external heating terminal. For example, this is a case where only the reheating operation is performed without performing the heating operation. Thereby, since the heat energy for heating the hot water in the bathtub does not flow to the external heating terminal side and is consumed, it is possible to prevent a decrease in heating efficiency in the bath heat exchanger.
Further, in the present invention, the external liquid valve is any one of the predetermined number of valve terminals included in the control device, and the valve terminal contributes to the operation control of the external pump. Is configured to be opened and closed using different valve terminals. In other words, when a new external liquid valve is newly installed, a new control device is not required as in the case of installing an external pump. The external pump and the external liquid valve can be controlled separately. As a result, for example, it is possible to perform control for driving the external pump after the external liquid valve is opened, and the external pump is driven even though the external liquid valve is closed. The trouble that the pressure in the heating circuit rises excessively can be prevented in advance.

  The invention according to claim 7 is the heat source apparatus according to claim 6, wherein the valve for external liquid is located downstream of the external pump in the flow direction of hot water or heat medium.

  According to such a configuration, the external liquid valve is disposed downstream of the external pump, that is, between the discharge side of the external pump and the return side of the heat source machine main body. Even if a situation occurs in which the external pump is driven in that state, there is no possibility of causing an increase in pressure in the heating circuit on the heat source apparatus main body side upstream of the external pump. As a result, the heating circuit can avoid problems caused by the pressure increase on the heat source unit main body side.

  In the eighth aspect of the invention, the external liquid valve is a thermally operated valve, and the external pump is activated after a certain time has elapsed since the external liquid valve was controlled in the opening direction. The heat source device according to claim 6 or 7, characterized in that

  According to such a configuration, since the external pump can be driven after the external liquid valve is opened, a water flow is generated during the opening of the external liquid valve, and the external liquid valve is Thus, it is possible to prevent the water pressure from being excessively applied. Thereby, there is no possibility that the valve for out-of-machine liquid may cause damage due to water pressure.

  The invention according to claim 9 has a valve open / close detection function for detecting the open / closed state of the valve for external liquid, the external liquid valve is controlled in the opening direction and the main pump is activated, In addition, when the external pump is not activated, the external pump is not activated if it is not detected that the open state is detected even after a predetermined time has elapsed since the external liquid valve is controlled in the opening direction. The heat source device according to claim 6, wherein the heat source device is a heat source device.

  According to such a configuration, it is possible to prevent a problem that the external pump continues to be wasted in a state where the external liquid valve is not sufficiently opened.

  The invention described in claim 10 has temperature detecting means for detecting the temperature of the heated hot water or the heating medium or the atmosphere temperature inside the heat source machine main body, and the valve for the liquid outside the machine is controlled in the opening direction and is mainly used. In the state where the pump is started and the heating operation in the heating unit is started, when the temperature detected by the temperature detection means reaches a predetermined temperature or more before a predetermined time has elapsed since the heating operation was started, The heat source device according to claim 9, wherein the external liquid valve is determined to be in a closed state.

  According to such a configuration, if the temperature monitored by the temperature detecting means continues to rise and becomes abnormally high, the external liquid valve is not sufficiently opened, so that no water flow is generated in the heating circuit. Can be determined. That is, according to the present invention, it is possible to prevent a problem that the heating operation is continued in a state where there is not sufficient water flow in the heating circuit.

  According to an eleventh aspect of the present invention, there is provided an informing means for informing outside of at least malfunction information of the external liquid valve, and it is detected by the valve opening / closing detection function that the external liquid valve is in a closed state. 11. The heat source device according to claim 9 or 10, wherein the heat source device is notified of a closed failure of the external liquid valve or a wiring failure of the external liquid valve.

  According to such a configuration, it is possible to promptly notify the outside of the situation that the external liquid valve is not opened due to some abnormality by the notification means.

  In the invention according to claim 12, when a request for heating the hot water in the bathtub occurs regardless of the current flow of water in the heating circuit, the operation of the external pump is continued until a predetermined condition is satisfied. It is controlled to a stop state, It is a heat source device in any one of Claims 6-11.

  According to such a configuration, when the reheating operation and the heating operation are performed simultaneously, the reheating operation can be preferentially performed. That is, in the simultaneous operation, if the external pump is driven, hot water is likely to flow to the external heating terminal side, but by forcibly stopping the external pump, the bath heat exchanger Hot water can easily flow to the side. As a result, there is no possibility that the chasing time will be unnecessarily prolonged. At this time, there is a concern that the heating capacity may be weakened, but since the chasing operation is temporary, there is almost no influence on the heating effect experienced by the consumer.

  The invention according to claim 13 is based on the same knowledge as that of the invention according to claim 12, and when a request to heat hot water in the bathtub occurs regardless of the current flow of water in the heating circuit, The heat source device according to any one of claims 6 to 12, wherein the external liquid valve is controlled to be closed until the condition is satisfied.

  According to such a configuration, when the reheating operation and the heating operation are performed simultaneously, the reheating operation can be preferentially performed. That is, in the simultaneous operation, if the external liquid valve is opened, hot water tends to flow to both the bath heat exchanger and the external heating terminal side, but the external liquid valve is forced. By closing, hot water can easily flow to the bath heat exchanger side. As a result, there is no possibility that the chasing time will be unnecessarily prolonged. At this time, there is a concern that the heating capacity may be weakened, but since the chasing operation is temporary, there is almost no influence on the heating effect experienced by the consumer.

  The invention described in claim 14 circulates back through the heat source unit main body in which the heating unit and the main pump are built in the casing, the discharge port for discharging hot water or the heat medium from the heat source unit main body, and the external device. It has a return port for introducing hot water or a heat medium into the heat medium body, a liquid valve is attached in advance to the discharge port or the return port, and / or a liquid valve can be newly attached. A heat source device including a control device having a predetermined number of terminals for outputting a signal for opening and closing a valve or electric power for opening and closing a liquid valve, and any of the terminals may be a terminal for controlling the operation of an external pump Switching means that can be used and can switch between outputting a signal for opening / closing the liquid valve or electric power for opening / closing the liquid valve, or outputting a signal or electric power for controlling the operation of the external pump from the terminal. A heat source characterized by having It is the location.

  According to such a configuration, either the signal for opening / closing the liquid valve or the terminal for outputting electric power can be switched to the signal or electric power for starting / stopping the external pump by the switching means. Regardless of whether or not it is installed, it is possible to install a heat source device having the same control device. That is, a highly versatile heat source device can be provided.

  The heat source device of the present invention has a predetermined number of terminals used for the liquid valve, and requires a new control device to use any one of the terminals for starting and stopping the external pump. Without increasing the lifting force of the pump in the heating circuit. Thereby, even if it is a case where a heating circuit becomes long distance and water flow resistance and water flow volume increase, there is no possibility that heating capacity may be reduced.

It is an operation principle figure showing the heat source device concerning the embodiment of the present invention. It is explanatory drawing which shows the high temperature terminal circuit of the heat-source apparatus of FIG. It is explanatory drawing which shows the low temperature terminal circuit of the heat-source apparatus of FIG. It is explanatory drawing which shows the bath heating circuit of the heat-source apparatus of FIG. (When heating side bypass thermal valve is closed) It is a conceptual diagram which shows typically the relationship between the external pump provided in the exterior of the heat-source-machine main body of FIG. 1, an external heat valve, and a control apparatus. It is a circuit diagram showing an auxiliary power circuit typically. It is a flowchart which shows the characteristic operation | movement of the heat-source apparatus of FIG. It is a flowchart which shows the example of the renewal priority operation | movement performed when an external heat valve is controlled to the opening direction. It is a flowchart which shows the example of the renewal priority operation | movement performed when an external heat valve is controlled to an opening direction and an external pump is started. It is a flowchart which shows the modification of the operation | movement relevant when starting an external pump.

Hereinafter, the heat source apparatus 1 which concerns on this embodiment of this invention is demonstrated.
The heat source device 1 of the present embodiment can control the external pump 7 and the external heat valve 8 added to the outside of the heat source body 3 by the control device 2 without newly installing a terminal of the control device 2. The most part is a combustion apparatus having a configuration similar to that of a known one.

Therefore, first, a portion similar to the known one in the heat source device 1 will be briefly described.
The heat source device 1 of this embodiment is a so-called two-can two-water channel type combustion device, and is configured to include an independent combustion system. That is, as shown in FIG. 1, the heat source device 1 includes a hot water supply side can body 10 and a bath / heating side can body 11 inside the housing 9, and burns fuel in each of the can bodies 10 and 11. Combustion units (heating units) 5 and 6 that generate combustion gas, heat exchange units (heat exchangers) 12 and 13 that recover the thermal energy of the combustion gas, and blowers 15 and 16 that are similar to the known ones are provided. The heat source machine main body 3 is configured. The heat source device 1 is configured such that a hot water supply running water system 20, a bath / heating running water system 21, and a reheating running water system 22 are arranged across the heat source machine main body 3.

  Each combustion section 5, 6 is provided with a plurality of burners 40 for burning fuel gas, and a fuel pipe 41 for connecting the fuel gas to the burner 40 is connected. The fuel pipe 41 is bifurcated in the middle, and an original gas solenoid valve 42 is provided on the upstream side of the branch point, and the fuel gas flows to the respective burners 40 on the downstream side of the branch point. A regulating proportional valve 43 and a solenoid valve 44 are provided. That is, in each combustion part 5 and 6, the opening and closing of each fuel valve 42, 43 and 44 is controlled, and the fuel gas supplied through the fuel pipe 41 is burned by the burner 40 to generate combustion gas. The

  The hot water supply running water system 20 is partly formed by the hot water supply side heat exchanging unit 12, and the hot water supplied from the water supply source is heated by the hot water supply side heat exchanging unit 12 and provided outside the heat source machine body 3. The hot water supply main flow path 23 that leads to the currant and the like, and the hot water supply side bypass flow path 25 that bypasses the hot water supply side heat exchange section 12 are provided. The hot water supply water system 20 includes a hot water supply side bypass flow rate adjustment valve 26 that adjusts the flow rate passing through the hot water supply side bypass passage 25, and a hot water flow rate adjustment valve 27 that restricts the hot water flow rate when the hot water temperature is lower than a predetermined value. Etc. are provided.

Furthermore, the hot water supply running water system 20 is provided with a bath dropping channel 28 that branches from the hot water flow rate adjustment valve 27 and guides the hot water to the bath tub. The bath drop channel 28 is provided with a hot water solenoid valve 30 that restricts the flow of water to the bathtub, a backflow prevention mechanism 31 that prevents the backflow of water from the bathtub side, and the like.
Further, a hot water supply side can thermistor (temperature detecting means) 50 is provided on the outlet side of the hot water supply side heat exchanging unit 12, and the temperature of the hot water supply side heat exchanging unit 12 is monitored.

  The heating / running water system 21 is partly formed by the bath / heating-side heat exchange unit 13, and the bathroom heating provided outside the bath / heating-side heat exchange unit 13 and the heat source unit 3 shown in FIG. 2. A high-temperature terminal circuit (heating circuit) 32 that circulates between the high-temperature heating terminal (external heating terminal) 14 such as a machine or a panel heater, and the outside of the bath / heating-side heat exchange unit 13 and the heat source machine body 3 shown in FIG. A low-temperature terminal circuit (heating circuit) 33 that circulates between a low-temperature heating terminal (external heating terminal, not shown) such as floor heating, and a heating-side bypass that connects the high-temperature terminal circuit 32 and the low-temperature terminal circuit 33 It has the flow path 34 and the bath heating circuit 35 which heats the hot water which flows through the reheating water system 22 mentioned later shown in FIG. The heating-side bypass flow path 34 is a shaded portion in FIG.

The bath / heating running water system 21 includes an internal pump (main pump) 36 that forms a circulating flow of hot water and a pressure increase due to expansion of the volume caused by the temperature change of the hot water on the inner side of the heat source machine body 3. Alternatively, a closed expansion tank (not shown) that suppresses a pressure drop due to contraction, and three systems of low-temperature heating thermal valves (liquid valves) provided in a low-temperature discharge port 52 that sends hot water toward a low-temperature terminal. 38), a heating-side bypass thermal valve (liquid valve) 39 provided on the heating-side bypass passage 34, and a bath-side thermal valve (liquid valve) that regulates water flow to the bath heating circuit 35. There are provided a liquid / liquid heat exchanger (bath heat exchanger) 46 and the like for performing heat exchange between 45 and hot water flowing in the reheating water system 22 described later.
Further, a bath / heating-side can thermistor (temperature detecting means) 51 is provided on the outlet side of the bath / heating-side heat exchanging unit 13, and the temperature of the bath / heating-side heat exchanging unit 13 is monitored. .

  In the reheating water system 22, the liquid / liquid heat exchanger 46 forms a part thereof, and hot water in the bathtub is provided between the liquid / liquid heat exchanger 46 and a bath tub (not shown). A circulation channel 47 that circulates is provided. The reheating channel 47 is provided with a retreating side pump 48 that forms a circulating flow of hot water. Note that the above-described bath dropping channel 28 is connected to the reheating channel 47.

Next, a basic operation of a general heat source device having the above configuration will be described.
Note that the basic operations of the heat source device are a hot water supply operation, a heating operation, and a bath dropping or reheating operation.
Briefly described below.

  In the hot water supply operation, if a calorie is operated and there is a demand for hot water, the hot water supply side heat exchanging unit 12 is heated by the combustion gas generated in the hot water supply side combustion unit 5, and hot water at a desired temperature is discharged from the curan or the like. The

The heating operation includes a high-temperature heating operation in which high-temperature hot water is circulated in the high-temperature heating terminal 14 such as a panel heater, and a low-temperature (not shown) temperature in the low-temperature heating terminal (not shown) such as a floor heating device. There is a low-temperature heating operation that circulates hot water.
That is, in the high-temperature heating operation, the bath / heating-side heat exchange unit 13 is heated by the combustion gas generated in the bath / heating-side combustion unit 6, and hot water is supplied to the high-temperature heating terminal 14 via the high-temperature terminal circuit 32. Circulated. More specifically, the high-temperature heating terminal 14 has a valve (not shown), and hot water flows through the high-temperature heating terminal 14 by opening the valve, so that the high-temperature heating operation is performed.
In the low-temperature heating operation, the bath / heating-side heat exchange unit 13 is heated by the combustion gas generated in the bath / heating-side combustion unit 6, and low-temperature hot water is circulated to the low-temperature heating terminal via the low-temperature terminal circuit 33. Is done. More specifically, by opening the three systems of low-temperature heating heat valves 38a to 38c on the heat source unit main body 3 side, hot water circulates in the low-temperature heating terminal, and the low-temperature heating operation is performed.

In the reheating operation, if the temperature of the hot water in the bathtub is lower than a predetermined temperature or if there is a request for reheating operation by a remote controller or the like, the hot water in the bathtub is set to the set temperature via the liquid / liquid heat exchanger 46. Heat until. More specifically, in the reheating operation of the present embodiment, the bath / heating-side heat exchange unit 13 is heated by the combustion gas generated in the bath / heating-side combustion unit 6, and the heat is supplied to the bath / heating-flowing water system 21. Indirectly, the water is transferred to the reheating channel 47 to heat the hot water in the bathtub.
The bath drop-in operation is different only in the method of requesting hot water (request through a remote controller or the like), and an operation substantially similar to the hot water supply operation is performed, and thus description thereof is omitted.

Next, a characteristic configuration of the heat source device 1 of the present embodiment will be described.
The heat source device 1 of the present embodiment can maintain the head of the pump in the heating circuit within an appropriate range when the heating circuit is extended by installing a large number of high-temperature heating terminals 14 such as panel heaters. Is. That is, the present embodiment is configured such that a new pump (external pump 7) is added to the outside of the heat source machine body 3 in order to suppress a reduction in the pump head in the heating circuit, particularly in the high temperature terminal circuit 32. The external pump 7 is arranged in series with an internal pump 36 provided in the heat source body 3.
In the present embodiment, an external pump having the same capability as the internal pump 36 built in the heat source main body 3 is employed in order to stabilize the water flow in the heating circuit.

  Further, in the present embodiment, even when a valve (not shown) of the high temperature heating terminal 14 is closed, an excessive load is not applied to the high temperature heating terminal 14 due to the water supply pressure of the external pump 7. It is said that. In other words, the high temperature terminal circuit 32 is provided with an external bypass passage 29 that bypasses the high temperature heating terminal 14 at a position downstream of the external pump 7. And this external bypass flow path 29 is set to the flow path diameter so that the amount of hot water flowing to the high temperature heating terminal 14 is not extremely reduced during the high temperature heating operation. That is, the flow path diameter of the external bypass flow path 29 is smaller than the flow path diameter of the flow path from the inlet side to the outlet side of the flow path 29 through the high temperature heating terminal 14. Therefore, in this embodiment, when the valve (not shown) in the high temperature heating terminal 14 is opened, hot water sent by the external pump 7 mainly flows to the high temperature heating terminal 14 side, and when the valve (not shown) in the high temperature heating terminal 14 is closed. The hot water sent by the external pump 7 flows only into the external bypass passage 29.

  Further, in the present embodiment, the external heat valve 8 is provided on the high temperature terminal circuit 32 outside the heat source device main body 3. Specifically, the external heat valve 8 is provided on the downstream side of the outlet side of the external bypass passage 29. Further, a portion of the low-temperature terminal circuit 33 downstream of the low-temperature heating terminal (not shown) joins at a position further downstream than the external heat valve 8. That is, the external heat valve 8 is arranged such that hot water that has passed through the high-temperature heating terminal 14 or the external bypass passage 29 passes but does not pass hot water that has passed through the low-temperature heating terminal.

  And in this embodiment, in order to control the newly installed external pump 7 and the external thermal valve 8 with the control apparatus 2 which the heat source apparatus 1 has, opening and closing of the low temperature heating thermal valve 38 is originally performed. It is set as the structure which allocated the terminal 17 for thermal valves used for control as a terminal for control of those apparatuses. That is, normally, the control device of the heat source device is provided with six systems of thermal valve terminals that contribute to the open / close control of the low temperature heating thermal valve, but in this embodiment, these thermal valve terminals 17 are provided. Among them, only three systems are used for the low-temperature heating thermal valves 38a to 38c, and two thermal valve terminals 17a and 17b among the remaining three systems of thermal valve terminals 17a to 17c are newly added. Used for installed equipment. The remaining one-system thermal valve terminal 17c remains unused.

More specifically, in this embodiment, as shown in FIG. 5, one system thermal valve terminal 17a is assigned to start and stop the external pump 7, and another one system thermal valve is used. A terminal 17b is assigned to open and close the external heat operated valve 8.
In addition, the control device 2 is provided with switching means 24 that can switch the electric device to be controlled in order to appropriately control the external pump 7 and the external heat valve 8. That is, in the present embodiment, the switching means 24 switches the control target of the thermal valve terminal 17a to the external pump 7, and further switches the control target of the thermal valve terminal 17b to the external thermal valve 8. It has been. In this way, the signal transmitted from the control device 2 is set by the switching unit 24 at an appropriate timing for each device.
In the present embodiment, a known dip switch is employed as the switching means 24, and the P state for controlling the low-temperature heating thermal valve 38 and other electrical devices (external pump 7 and external thermal valve). 8) can be switched to the Q state for controlling.

  In the present embodiment, the external pump 7 and the control device 2 are configured to be supplied with power from different power sources. That is, in the present embodiment, the external pump 7 is configured to use only a signal transmitted from the control device 2 and to be supplied with power from a power source different from the control device 2. Specifically, the external pump 7 is supplied with power from the commercial power supply 49 via the auxiliary power supply circuit 18. More specifically, as shown in FIG. 6, the auxiliary power supply circuit 18 is a circuit that connects the commercial power supply 49 and a motor (not shown) of the external pump 7, and opens and closes the circuit according to an input signal. A relay switch (switch means) 19 is provided. Therefore, in this embodiment, when the signal transmitted from the control device 2 is input to the relay switch 19 of the auxiliary power circuit 18, the circuit is closed and the external pump 7 is energized from the commercial power supply 49. The external pump 7 is driven.

Then, the characteristic operation | movement in the heat-source apparatus 1 of this embodiment is demonstrated.
In the present embodiment, as described above, during the high-temperature heating operation, in order to maintain the pump head in the high-temperature terminal circuit 32 within an appropriate range, control of the external pump 7 and the like is executed in addition to the internal pump 36. . That is, according to the flowchart of FIG. 7, first, in step 1, it is confirmed whether or not the high temperature heating operation is started. Specifically, whether or not the high temperature heating operation switch is turned on is confirmed by a remote controller (not shown). If the start of the high-temperature heating operation is confirmed in step 1, the process proceeds to step 2 and the external heat valve 8 is controlled in the opening direction. That is, the signal generated by the control device 2 is transmitted via the thermal valve terminal 17b, and the external thermal valve 8 is opened when the signal is received. In this embodiment, it is necessary to manually or electrically adjust the opening degree of a valve (not shown) provided in the high temperature heating terminal 14 prior to the opening control of the external heat operated valve 8.

  Then, after the opening control of the external heat valve 8, a certain time (for example, 2 to 3 minutes) after the opening control of the external heat valve 8 is started by a first timer (not shown) provided in the control device 2. Is counted (step 3), the process proceeds to step 4 and the external pump 7 is started. That is, the external pump 7 uses the power supplied from the commercial power supply 49 when the relay switch 19 of the auxiliary power supply circuit 18 is turned on by a signal relaying the thermal valve terminal 17 a provided in the control device 2. It is activated. In the present embodiment, prior to or simultaneously with the start-up control of the external pump 7, the in-machine pump 36 built in the heat source machine body 3 is started and the combustion operation in the bath / heating-side combustion unit 6 is performed. Be started.

  In step 4, after the start-up control of the external pump 7, a certain time (for example, 3 to 5 minutes) has elapsed since the external pump 7 was started by a second timer (not shown) provided in the control device 2. Is measured, it is confirmed whether or not the detected temperature of the bath / heating-side can thermistor 51 reaches a predetermined temperature (for example, 80 ° C.) or more (step 5). That is, in step 5, it is confirmed whether or not a water flow is formed in the high temperature terminal circuit 32 by driving the in-machine pump 36 and the out-of-machine pump 7. In Step 5, if the bath / heating-side can body thermistor 51 detects a temperature equal to or higher than a predetermined temperature, the process proceeds to Step 9, and it is determined that there is some abnormality in the external heat valve 8. In other words, it is determined that the control device 2 does not open enough to form a water flow in the high-temperature terminal circuit 32 even though the external thermal valve 8 is controlled to open (valve open / close detection function). . Information generated based on the determination result is transmitted to a remote controller or the like, and is notified to the outside by a notification means such as a buzzer. In addition, when this determination result comes out, high temperature heating operation becomes impossible.

  On the other hand, if the bath / heating-side can thermistor 51 does not detect a temperature equal to or higher than the predetermined temperature in step 5, the process proceeds to step 6 and waits until a signal for ending the high-temperature heating operation is generated. That is, when the switch for stopping the high-temperature heating operation such as the remote controller is turned on, the combustion operation of the bath / heating-side combustion unit 6 is stopped first, and then the process proceeds to step 7 where the external pump 7 and the internal pump 36 is stopped. That is, the signal generated by the control device 2 is transmitted via the thermal valve terminal 17a, and stops when the external pump 7 receives the signal. And it transfers to step 8, the external heat valve 8 is closed, and high temperature heating operation is complete | finished completely. That is, the signal generated by the control device 2 is transmitted via the thermal valve terminal 17b, and the external thermal valve 8 is closed when receiving the signal.

Further, in the present embodiment, in a situation where simultaneous operation of heating operation and reheating operation is performed, a renewal priority function that preferentially executes reheating operation is provided. That is, if an execution command for a reheating operation is generated while the heating operation is being performed, the heating operation is stopped and the reheating operation is performed. Then, if the reheating operation is completed and a heating operation stop command is not generated after that (if the heating operation is continued), the heating operation is performed again. Also, if a heating operation execution command is generated during the reheating operation, the start timing of the heating operation is delayed until the reheating operation is completed.
As described above, in this embodiment, it is always monitored whether the heating operation and the reheating operation are simultaneously performed, and if the situation occurs, the renewal priority function is exhibited.

  For example, if the start of the high-temperature heating operation is confirmed in Step 1 shown in the flowchart of FIG. 7 and the execution command of the reheating operation is generated after the external heat valve 8 is opened in Step 2, the renewal operation is generated. In order to give priority to the whispering operation, the process proceeds to step X1 in FIG. That is, in step X1, the external heat valve 8 is closed. And it transfers to step X2 and waits until a fixed time passes after the external heat valve 8 is controlled in the closing direction. That is, it waits until the external heat valve 8 is completely closed. Then, when the external heat valve 8 is completely closed, the reheating operation is started (step X3). Thereafter, if it is confirmed that the chasing operation has been completed (step X4), the process proceeds to step 1 shown in the flowchart of FIG. 7, and the same operation as described above is executed.

  In addition, in step 4 shown in the flowchart of FIG. 7, when an execution instruction for the reheating operation is generated after the external pump 7 is started, the operation that gives priority to the reheating operation is performed according to the flowchart shown in FIG. 9. Executed. That is, in this case, first, the process proceeds to step Y1 in FIG. In step Y1, the external pump 7 is stopped. And it transfers to step Y2 and controls the external heat valve 8 in a closing direction. When the external heat valve 8 is controlled in the closing direction, in step Y3, the process waits until a certain time elapses after the external heat valve 8 is controlled in the closing direction. Then, when the external heat valve 8 is completely closed, the reheating operation is started (step Y4). Thereafter, if it is confirmed that the chasing operation is completed (step Y5), the process proceeds to step 1 shown in the flowchart of FIG. 7, and the same operation as described above is executed.

As described above, in this embodiment, the unused portion of the thermal valve terminal 17 that is originally provided in the control device 2 and used for the low temperature heating thermal valve 38 is replaced with the external pump 7 and the external thermal valve. Therefore, it is not necessary to newly install a new terminal in the control device 2 in order to control the added device.
Further, in the present embodiment, the power for driving the external pump 7 is supplied via the auxiliary power circuit 18 connected to the commercial power source 49 different from the control device 2, so that the power capacity of the control device 2 is insufficient. Even in this case, the external pump 7 can be reliably driven. Further, since the auxiliary power supply circuit 18 is controlled by a signal generated by the control device 2, it is not necessary to bother to adjust the control linkage with other devices. That is, according to the present embodiment, the heat source apparatus 1 has high linkage with other devices, and the newly installed external pump 7 and the like can be controlled at an appropriate timing.

In this embodiment, since the external heat valve 8 is installed downstream of the external pump 7, the external heat valve 8 is not opened for some reason, and the external pump 7 is driven in this state. Even if the situation occurs, excessive water pressure is not generated on the heat source unit main body 3 side. As a result, it is possible to avoid occurrence of some trouble on the heat source machine main body 3 side due to excessive water pressure caused by a closed failure of the external heat valve 8 or the like.
In this embodiment, since the external heat valve 8 is controlled in the opening direction and the external pump 7 and the internal pump 36 are started after a certain time has elapsed, the external heat valve 8 is in operation. Excessive water pressure is not applied. That is, there is almost no possibility that the external heat valve 8 will fail due to such water pressure.
Furthermore, in this embodiment, since the valve opening / closing detection function capable of detecting the open / closed state of the external thermal valve 8 is provided, the external pump 7 is in a state where the external thermal valve 8 has a closed failure. Can be prevented from continuing to drive. And if this valve open / close detection function detects a closed failure of the external heat valve 8, it is notified by a remote control or the like, so that the consumer recognizes the failure and requests a repairer. Can be convenient.

In the present embodiment, when the reheating operation and the heating operation are simultaneously performed, the function of preferentially performing the reheating operation is provided, so that inconvenience is not given to the consumer.
Explaining this, when the high-temperature heating operation and the reheating operation are executed simultaneously, the pump head of the high-temperature terminal circuit 32 becomes larger due to the action of the external pump 7, so that it is heated by the bath / heating-side combustion unit 6. Hot water is more likely to flow toward the high temperature terminal circuit 32 than the bath heating circuit 35. For this reason, when the said operation is performed simultaneously, the thermal energy supplied to the bath heating circuit 35 will reduce extremely, and there exists a possibility that the time which heats the hot water in a bathtub to preset temperature may be unnecessarily prolonged. Due to such circumstances, in the present embodiment, when a situation in which the reheating operation and the heating operation are performed simultaneously occurs, the reheating operation is preferentially executed by temporarily stopping or waiting for the heating operation. doing.
In this way, by performing the repricing priority operation, the time required for the reluctance operation is not unnecessarily prolonged. Further, since the chasing operation is temporary, even if the heating operation is temporarily stopped, there is almost no influence on the heating effect experienced by the consumer.

In the said embodiment, although the heat source machine main body 3 provided with the three-system low temperature heating heat valve 38 was shown, this invention is not limited to this, The heat source machine main body provided with the six low temperature heating heat valve 38 It does not matter. In this case, since there is no unused thermal valve terminal 17 in the control device 2, the use of any of the six systems of the low-temperature heating thermal valve 38 is stopped, and the low-temperature heating thermal valve 38 that has been stopped is used. The corresponding thermal valve terminal 17 may be used for the external pump 7 or the external thermal valve 8.
In addition, as another configuration, it is also possible to use a configuration for controlling the external pump 7 and the external thermal valve 8 by sharing another terminal (not shown) that controls the opening and closing of the heating bypass thermal valve 39 that is a liquid valve. . That is, the external pump 7 and the external heat valve 8 are controlled by sharing a signal for opening and closing the heating bypass heat valve 39.

  In the above-described embodiment, the configuration in which power is supplied to the external pump 7 using the auxiliary power supply circuit 18 is shown, but the present invention is not limited to this, and the configuration in which power is directly supplied from the control device 2 is shown. It does not matter.

In the above embodiment, in the case where the reheating operation and the high temperature heating operation are performed simultaneously after the external heat valve 8 is opened and the external pump 7 is started, the renewal priority operation is to be performed. The operation of performing the control for stopping the external pump 7 and further closing the external thermal valve 8 has been described. However, the present invention is not limited to this, and the chasing operation is temporary. The operation of stopping only the outer pump 7 or closing only the external heat valve 8 may be carried out in the case of a priority operation.
Further, the present invention may be configured not to perform the follow-up priority operation as in the above embodiment.

  In the said embodiment, although the control apparatus 2 provided with the structure which changes the electric equipment used as the control object of the terminal 17 for thermal valves by the switching means 24 was shown, this invention is not limited to this, The switching means 24 is shown. The configuration may not be provided. That is, you may employ | adopt the control apparatus which changed either the control object of the terminal 17 for thermal valve 17 to the external pump 7 or the external thermal valve 8 in the factory beforehand.

  In the above-described embodiment, a configuration in which three systems of low-temperature heating heat valves 38 are provided with respect to the heat source machine main body 3, but the present invention is a heat source in which four or more systems of low-temperature heating heat valves 38 are provided. It may be the machine body. That is, if the four systems of the low temperature heating thermal valve 38 are provided, the two systems of the thermal valve terminals 17 are unused, so that the unused terminals 17 are connected to the external pump and the external heat. One of the thermal valve terminals 17 that is originally used for the low-temperature heating heat valve 38 is used in the valve 8 if the five-line or six-line low-temperature heating heat valve 38 is provided. Alternatively, the two are not used for the low-temperature heating thermal valve 38 but are used for the external pump 7 and the external thermal valve 8. By using the thermal valve terminal 17 in this way, the same effects as those of the above embodiment can be obtained.

  In the above-described embodiment, after the opening control of the external heat valve 8, when the first timer counts for a certain time (for example, 2 to 3 minutes), the configuration including the operation of starting the external pump 7 is shown. The present invention is not limited to this, as shown in the flowchart of FIG. 10, after the opening control of the in-machine thermal valve 8, the start-up of the in-machine pump 36, or the start of the combustion operation of the bath / heating combustion unit 6, If one timer is started (step 30) and the temperature of the bath / heating-side can body thermistor 51 does not detect a predetermined temperature or more while the measured time passes a certain time (step 31). 32) The operation for starting the external pump 7 may be executed (step 33). In this control, if the temperature detected by the bath / heating-side can body thermistor 51 detects a predetermined temperature or higher before the time measured by the first timer has passed a predetermined time (step 31), the outside of the machine An abnormality determination of the thermal valve 8 is performed (step 35).

  In the above embodiment, a configuration in which a closed expansion tank (not shown) is provided in the heating circuit is shown. However, the present invention is not limited to this, and a configuration in which an open expansion tank is provided instead of the sealed one. It does not matter.

  In the said embodiment, although the structure provided with the hot water flow system 20, the bath / heating flow system 21, and the reheating flow system 22 was shown, this invention is not limited to this, Only the water supply flow system 20 and a heating circuit are shown. The structure provided with the heating running water system provided with, and the structure provided only with the heating running water system provided only with the heating circuit may be sufficient.

DESCRIPTION OF SYMBOLS 1 Heat source apparatus 2 Control apparatus 3 Heat source machine main body 7 External pump 8 External heat valve 9 Case 13 Bath / heating side heat exchange part 14 High temperature heating terminal 17 Thermal valve terminal 21 Heating flow system 22 Reheating flow system 32 High temperature terminal circuit 33 Low temperature terminal circuit 35 Bath heating circuit 36 In-machine pump (main pump)
38 Low Temperature Heating Valve (Liquid Valve)
39 Heating bypass thermal valve (liquid valve)
46 Liquid / liquid heat exchanger (bath heat exchanger)
47 Reheating channel 50 Hot water supply side can body thermistor (temperature detection means)
51 Bath / heating side can thermistor (temperature detection means)
52 Low temperature outlet

Claims (14)

In a heating circuit, a heating source body having a heating unit and a main pump built in a housing, a heating circuit capable of passing hot water or a heat medium heated by the heating unit to an external heating terminal by driving the main pump, and a heating circuit A heat source device including a control valve provided with a predetermined number of terminals for outputting a valve for liquid to restrict water flow and a signal for opening and closing the liquid valve or electric power for opening and closing the liquid valve,
Located outside the heat source machine body, it has an external pump provided between the heating unit in the heating circuit and the external heating terminal,
The control device is capable of controlling the operation of the external pump via any one of the predetermined number of terminals.   The control device includes a switching unit capable of changing a control target from preset electrical devices, and the control target controlled via the terminal by operating the switching unit is changed to the original control target. The heat source device according to claim 1, wherein the heat source device can be changed from a valve for liquid to an external pump.   An auxiliary power supply circuit that outputs a current from a commercial power supply is provided, and the auxiliary power supply circuit includes a switch unit that interrupts current, and the switch unit uses a signal or power output from the terminal as a start / stop signal. The heat source device according to claim 1, wherein the current output to the external pump is intermittent. The external heating terminal includes a high temperature heating terminal through which high temperature hot water or a heat medium flows,
The heat source apparatus according to any one of claims 1 to 3, wherein the external pump is disposed between the heating unit and the high temperature heating terminal. The heat source machine main body is provided with a low temperature side discharge port for discharging hot water or heat medium having a temperature lower than that of the high temperature hot water or heat medium,
The terminal is a terminal that outputs a signal for opening and closing a liquid valve for intermittently flowing the flow of the low-temperature hot water or a heat medium discharged from the low-temperature side outlet, or electric power for opening and closing the liquid valve. The heat source device according to claim 4. The main body of the heat source has a bath heat exchanger, and the primary side of the bath heat exchanger passes hot water or heat medium heated by the heating unit, and the secondary side of the bath heat exchanger. The hot water in the bathtub passes through,
Located outside the heat source machine main body, between the heating unit in the heating circuit and the external heating terminal, an external liquid valve is provided,
2. The control device performs open / close control of an external liquid valve via another terminal different from a terminal contributing to operation control of the external pump among the predetermined number of terminals. Heat source apparatus in any one of -5.   The heat source apparatus according to claim 6, wherein the external liquid valve is located downstream of the external pump in the flow direction of the hot water or the heat medium. The external liquid valve is a thermal valve,
The heat source device according to claim 6 or 7, wherein the external pump is started after a predetermined time has elapsed since the external liquid valve was controlled in the opening direction. It has a valve open / close detection function that detects the open / close state of the valve for external liquid
In a state where the external liquid valve is controlled in the opening direction and the main pump is activated and the external pump is not activated, a predetermined time has elapsed since the external liquid valve was controlled in the opening direction. The heat source device according to any one of claims 6 to 8, wherein when the open state is not detected even after elapse, the external pump is not started. Having temperature detection means for detecting the temperature of the heated hot water or heat medium or the atmosphere temperature inside the heat source machine body,
In the state where the external liquid valve is controlled in the opening direction and the main pump is started and the heating operation in the heating unit is started, the temperature is detected before a predetermined time elapses after the heating operation is started. The heat source device according to claim 9, wherein when the temperature detected by the means reaches a certain temperature or more, it is determined that the external liquid valve is in a closed state. Having at least an informing means for informing outside of the trouble information of the valve for external liquid,
If the valve open / close detection function detects that the external liquid valve is closed, it informs that the external liquid valve is closed or that the external liquid valve is defective. The heat source device according to claim 9 or 10, characterized in that:   Regardless of the current flow of water in the heating circuit, when a request to heat the hot water in the bathtub occurs, the operation of the external pump is controlled to stop until a predetermined condition is satisfied The heat source device according to any one of claims 6 to 11.   Regardless of the current flow of water in the heating circuit, when a request to heat hot water in the bathtub occurs, the external liquid valve is controlled to be closed until a predetermined condition is satisfied. The heat source device according to any one of claims 6 to 12. Heat source unit main body with heating unit and main pump built in housing, discharge port for discharging hot water or heat medium from heat source unit main body, hot water or heat medium returned through circulation of external equipment to heat medium main body A return port to be introduced, a liquid valve is pre-attached to the discharge port or the return port, and / or a liquid valve can be newly attached, and a signal or liquid valve for opening and closing the liquid valve A heat source device including a control device having a predetermined number of terminals for outputting electric power to open and close
Any of the terminals can also be used as a terminal for controlling the operation of the external pump,
It has switching means capable of switching between outputting a signal for opening and closing the liquid valve or electric power for opening and closing the liquid valve from the terminal, or outputting a signal or electric power for controlling the operation of the external pump. Heat source device.

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