JP6801991B2 - Heating device - Google Patents

Description

The present invention relates to a heating device that heats using a heat medium such as hot water.

In a heating device that uses a heat medium such as hot water, hot water heated by a heat source machine is circulated via a heating terminal such as a floor heating device, and the heat of the hot water is dissipated by the floor heating device to perform heating. It has been known. For such a heating device, a technique for determining whether or not a pipe is correctly connected to a heating terminal has been proposed (for example, Patent Document 1).

The erroneous piping detection system in the bathroom heating device described in Patent Document 1 connects a bathroom heater as a heating terminal and a hot water supply device as a heat source machine via hot water going pipes and hot water returning pipes, and hot water going out. The temperature inside the pipe is detected by the temperature sensor, and the difference between the first temperature in the temperature sensor before the bathroom heater starts heat exchange and the second temperature in the temperature sensor after starting heat exchange. Determines whether or not exceeds a predetermined threshold value, and detects whether or not the piping is erroneously connected based on the determination result.

Japanese Unexamined Patent Publication No. 2011-106735

A high-temperature heating terminal and a low-temperature heating terminal are provided as heating terminals, and in a heating device in which the capacity of the heat pump is low and the heating temperature of the heat pump is relatively low, only the low-temperature heating terminal uses the heating of the heat pump. Two types of piping are provided, one for high temperature and the other for low temperature. In this case, a high-temperature hot water outflow pipe and a high-temperature hot water return pipe, and a low-temperature hot water outflow pipe and a low-temperature hot water return pipe are provided.

In such a heating device, there are various patterns of misconnection of pipes. For example, there is a pattern in which a low-temperature hot water outflow pipe and a high-temperature hot water return pipe are connected to a high-temperature heating terminal, and a pattern in which a low-temperature hot water outflow pipe and a low-temperature hot water return pipe are connected to a high-temperature heating terminal. In the connection determination as in 1, it is not possible to detect erroneous connections of all patterns.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heating device capable of reliably determining a normal connection even when a high-temperature heating terminal and a low-temperature heating terminal are provided. To do.

The heating device of the present invention is heated by an auxiliary heat source for heating a heat medium, a heat pump for heating the heat medium, an auxiliary heat source flow path for circulating the heat medium heated by the heat pump to the auxiliary heat source, and the auxiliary heat source. The high temperature terminal inlet flow path for circulating the heat medium to the high temperature heating terminal, the low temperature terminal inlet flow path for circulating the heat medium heated by the auxiliary heat source to the low temperature heating terminal, and the heat medium from the high temperature heating terminal. A high-temperature terminal outlet flow path that flows through the auxiliary heat source flow path, a low-temperature terminal outlet flow path that distributes the heat medium from the low-temperature heating terminal to the heat pump, and a low-temperature heating flow path that opens and closes the low-temperature terminal inlet flow path. The on-off valve, the high-temperature terminal on-off valve provided in the high-temperature heating terminal and controlling the inflow of the heat medium from the high-temperature terminal inlet flow path to the high-temperature heating terminal, and the temperature of the heat medium in the high-temperature heating terminal are detected. High temperature terminal temperature detecting means, low temperature terminal temperature detecting means for detecting the temperature of the heat medium in the low temperature heating terminal, and low temperature outlet flow path temperature detecting means for detecting the temperature of the heat medium in the low temperature terminal outlet flow path. When the high temperature terminal on-off valve is opened, the low-temperature heating flow path on-off valve is closed, and the auxiliary heat source is driven to heat the heat medium, the temperature detected by the high-temperature terminal temperature detecting means Is higher than the first predetermined temperature before heating of the heat medium by the auxiliary heat source, and the detection temperature by the low temperature outlet flow path temperature detecting means is the second predetermined temperature or more than before heating of the heat medium by the auxiliary heat source. It is provided with a normal connection determining means for determining that the high temperature terminal inlet flow path and the high temperature terminal outlet flow path are in a normal connection state connected to the high temperature heating terminal and notifying the person when the temperature is not rising. It is a feature.

According to the present invention, when the high temperature terminal on-off valve is opened, the low-temperature heating flow path on-off valve is closed, and the auxiliary heat source is driven to heat the heat medium, the high-temperature terminal inlet flow path and the high-temperature terminal If the outlet flow path is in a normal connection state connected to the high-temperature heating terminal, when the heat medium is heated by the auxiliary heat source machine (for example, 80 ° C), the heat medium at 80 ° C will be applied to the high-temperature heating terminal. It flows and does not flow to the low temperature heating terminal. Therefore, the temperature detected by the high temperature terminal temperature detecting means (80 ° C) is higher than that before heating the heat medium (for example, 50 ° C), and the temperature detected by the low temperature outlet flow path temperature detecting means (for example, 50 ° C). C) is the same as before heating the heat medium (50 ° C). Focusing on this point, when the above control is performed, in the normal connection determination means, the temperature detected by the high temperature terminal temperature detecting means (80 ° C) is first higher than that before heating the heat medium (50 ° C). The temperature rises by a predetermined temperature (for example, 10 ° C) or more, and the temperature detected by the low temperature outlet flow path temperature detecting means (50 ° C) is a second predetermined temperature (for example, 50 ° C) than before heating of the heat medium (50 ° C). If the temperature does not rise by 5 ° C) or more, it is determined that the high temperature terminal inlet flow path and the high temperature terminal outlet flow path are in a normal connection state connected to the high temperature heating terminal, and a notification is given. And the normal connection between the high temperature terminal outlet flow path and the high temperature heating terminal can be reliably determined and notified.

Further, when the normal connection determination means closes the high temperature terminal on-off valve, opens the low-temperature heating flow path on-off valve, and drives the auxiliary heat source to heat the heat medium, the low temperature The temperature detected by the terminal temperature detecting means is higher than that before heating the heat medium by the auxiliary heat source by a third predetermined temperature or more, and the temperature detected by the low temperature outlet flow path temperature detecting means is before heating the heat medium by the auxiliary heat source. It is preferable to determine that the low temperature terminal outlet flow path is in a normal connection state connected to the low temperature heating terminal and notify the temperature when the temperature rises by a fourth predetermined temperature or more.

According to this configuration, when the high temperature terminal on-off valve is closed, the low-temperature heating flow path on-off valve is opened, and the auxiliary heat source is driven to heat the heat medium (for example, 80 ° C), the temperature is low. If the terminal outlet flow path is in a normal connection state connected to the low temperature heating terminal, for example, a heat medium of 80 ° C flows through the low temperature heating terminal, and even if heat is dissipated by the low temperature heating terminal, the low temperature terminal outlet flow path For example, a heat medium of about 65 ° C flows. Focusing on this point, when the above control is performed, the normal connection determining means has a temperature detected by the low temperature terminal temperature detecting means (for example, 80 ° C) higher than that before heating the heat medium (for example, 50 ° C). Also rises by a third predetermined temperature (for example, 10 ° C) or more, and the temperature detected by the low temperature outlet flow path temperature detecting means (for example, 65 ° C) is higher than that before heating the heat medium (for example, 50 ° C). When the temperature rises by the fourth predetermined temperature (for example, 10 ° C) or more, it is determined that the low temperature terminal outlet flow path is in the normal connection state connected to the low temperature heating terminal, and the notification is sent. It is possible to reliably determine and notify the normal connection with the heating terminal.

Further, the normal connection determining means opens the high temperature terminal on-off valve, closes the low-temperature heating flow path on-off valve, and drives the auxiliary heat source to heat the heat medium. When the temperature detected by the terminal temperature detecting means does not rise by a fifth predetermined temperature or more than before heating the heat medium by the auxiliary heat source, the low temperature terminal inlet flow path is connected to the low temperature heating terminal in a normal connection state. It is preferable to determine that there is and notify the presence.

According to this configuration, when the high temperature terminal on-off valve is opened, the low-temperature heating flow path on-off valve is closed, and the auxiliary heat source is driven to heat the heat medium (for example, 80 ° C.), the temperature is low. If the terminal inlet flow path is in a normal connection state connected to the low-temperature heating terminal, a heat medium of, for example, 80 ° C does not flow through the low-temperature heating terminal. Focusing on this point, when the above control is performed, the normal connection determination means has a temperature detected by the low temperature terminal temperature detecting means (for example, 50 ° C) higher than that before heating the heat medium (for example, 50 ° C). If the temperature does not rise by more than the fifth predetermined temperature (for example, 10 ° C), it is determined that the low temperature terminal inlet flow path is in the normal connection state connected to the low temperature heating terminal, and the notification is sent. It is possible to reliably determine and notify the normal connection between the road and the low temperature heating terminal.

The system configuration diagram of the heating device of this embodiment. The flowchart which shows the flow of the process of determining the connection state of the hot liquid flow path for high temperature side heating and the hot liquid circulation return path for high temperature heating. A system configuration diagram of a heating device in a state where the hot liquid flow path for heating on the high temperature side is incorrectly connected. System configuration diagram of a heating device in a state where the hot liquid circulation return path for high temperature heating is erroneously connected. The system configuration diagram of the heating device in the state where the hot liquid flow path for high temperature side heating and the hot liquid circulation return path for high temperature heating are erroneously connected. A flowchart showing a flow of a process for determining a connection state of a hot liquid circulation return path for low-temperature heating. The flowchart which shows the flow of the process which determines the connection state of the hot liquid flow path for low temperature side heating. The system block diagram of the heating apparatus of 2nd Embodiment. The flowchart which shows the flow of the process of determining the connection state of the hot liquid flow path for high temperature side heating of 2nd Embodiment. FIG. 5 is a system configuration diagram of a heating device in a state where the hot liquid flow path for heating on the high temperature side of the second embodiment is erroneously connected.

[First Embodiment]
As shown in FIG. 1, the heating device 1 of the present embodiment includes a storage tank unit 2 equipped with a storage tank 11 for storing an antifreeze liquid (hereinafter referred to as a hot liquid) as a heat medium for heating, and a hot liquid. Includes a heat pump unit 3 equipped with a heat pump 31 for heating, a combustion type heat source unit 4 equipped with a combustion type heat source machine 41 as an auxiliary heat source machine for hot liquid heating, and one or more heating terminals. A heating terminal unit 5 is provided.

In the present embodiment, the heating terminal unit 5 includes a high temperature side heating terminal 5H having a relatively high hot liquid temperature required for operation and a low temperature side heating terminal 5H having a hot liquid temperature required for operation lower than that of the high temperature side heating terminal 5H. It is equipped with a terminal 5L.

The storage tank 11 has a heat storage hot liquid circulation outward path 12a and a heat storage hot liquid circulation return path for circulating the hot liquid in the storage tank 11 via the condenser 35 (details will be described later) of the external heat pump 31. 12b is connected to a heating hot liquid circulation outward path 13a and a heating hot liquid circulation return path 13b for circulating the hot liquid in the storage tank 11 via the combustion type heat source unit 4 and the heating terminal unit 5. There is. The storage tank 11 may not be provided.

Further, in the storage tank 11, the temperature of the hot liquid in the storage tank 11 at each height position is set at a plurality of height positions (three in the illustrated example) having intervals in the height direction (vertical direction). The temperature sensors 14a, 14b, 14c to detect are mounted.

The hot liquid circulation outward path 12a for heat storage is connected to the lower part of the storage tank 11 and the condenser 35 of the heat pump 31. The hot liquid circulation return path 12b for heat storage is connected to the condenser 35 and the upper part of the storage tank 11. The heat storage circulation pump 18, which will be described later, is mounted on the heat storage hot liquid circulation outbound route 12a to circulate the hot liquid in the storage tank 11 to the heat storage hot liquid circulation outbound route 12a, the condenser 35 of the heat pump 31, and the heat storage hot liquid circulation. It is circulated through the return route 12b.

The upstream end of the heat storage hot liquid circulation outward path 12a is connected to the lower part of the storage tank 11, and the downstream end is connected to the condenser 35. The heat storage hot liquid circulation outward path 12a includes a check valve 15, a temperature sensor 16 that detects the temperature of the hot liquid flowing out of the storage tank 11 at the upstream portion of the heat storage hot liquid circulation outward path 12a, and a manual type. The on-off valve 17, the heat storage circulation pump 18 that generates a flow of hot liquid from the upstream side to the downstream side of the heat storage hot liquid circulation outward path 12a, and the temperature of the hot liquid that flows into the condenser 35 of the heat pump 31 are used for heat storage. A temperature sensor 19 for detecting in the downstream portion of the hot liquid circulation outward path 12a is attached.

In this case, in the example of the present embodiment, the check valve 15 and the temperature sensor 16 are arranged in the storage tank unit 2, the heat storage circulation pump 18 and the temperature sensor 19 are arranged in the heat pump unit 3, and the on-off valve 17 is arranged. It is arranged between the storage tank unit 2 and the heat pump unit 3.

The upstream end of the hot liquid circulation return path 12b for heat storage is connected to the outlet of the condenser 35 of the heat pump 31, and the downstream end is connected to the upper part of the storage tank 11. Then, in the heat storage hot liquid circulation return path 12b, a temperature sensor 20 that detects the temperature of the hot liquid flowing out from the condenser 35 at the upstream portion of the heat storage hot liquid circulation return path 12b, a manual on-off valve 21, and storage are provided. A temperature sensor 22 that detects the temperature of the hot liquid flowing into the tank 11 downstream of the heat storage hot liquid circulation return path 12b is mounted.

In this case, in the example of the present embodiment, the temperature sensor 20 is arranged in the heat pump unit 3, the temperature sensor 22 is arranged in the storage tank unit 2, and the on-off valve 21 is between the storage tank unit 2 and the heat pump unit 3. It is located in.

The hot liquid circulation outward path 13a for heating is connected to the storage tank 11 and the combustion type heat source unit 4. The heating hot liquid circulation return path 13b includes a high temperature heating hot liquid circulation return path 13b1 connected to the high temperature side heating terminal 5H and the heating hot liquid circulation outward path 13a, a low temperature side heating terminal 5L, and a storage tank 11. It is provided with a hot liquid circulation return path 13b2 for low temperature heating to be connected. The heating circulation pump 51, which will be described in detail later, allows the hot liquid in the storage tank 11 to pass through the heating hot liquid circulation outward path 13a, the combustion type heat source unit 4, the heating terminal unit 5, and the heating hot liquid circulation return path 13b. Circulate.

The upstream end of the heating hot liquid circulation outward path 13a joins the downstream end of the heat storage hot liquid circulation return path 12b. Therefore, the upstream end of the hot liquid circulation outward path 13a for heating is connected to the upper part of the storage tank 11 via the downstream end portion of the hot liquid circulation return path 12b for heat storage.

The downstream end of the hot liquid circulation return path 13b2 for low-temperature heating is connected to the lower part of the storage tank 11. Further, a distribution valve 23 installed in the storage tank unit 2 is mounted on the downstream portion of the hot liquid circulation return path 13b2 for low-temperature heating.

Further, there is a bypass path 24 for communicating the downstream portion of the hot liquid circulation return path 13b2 for low temperature heating and the upstream portion of the hot liquid circulation outward path 13a for heating via the distribution valve 23 without passing through the storage tank 11. It is provided.

In the present embodiment, the distribution valve 23 has two outlet ports, and of the hot liquid flowing in from the inlet port, the flow rate of the hot liquid flowing out from one outlet port of the two outlet ports and the other It is a valve that can variably control the ratio with the flow rate of hot liquid flowing out from the outlet port.

The heating of the distribution valve 23 is such that its inlet port communicates with the upstream side of the low temperature heating hot liquid circulation return path 13b2, and one outlet port communicates with the downstream side of the low temperature heating hot liquid circulation return path 13b2. It is interposed in the hot liquid circulation return path 13b, and the other outlet port is connected to the bypass path 24 so as to communicate with the heating hot liquid circulation outward path 13a via the bypass path 24.

Therefore, by controlling the distribution valve 23 by the tank control unit 72 provided in the storage tank unit 2, which will be described later, a part of the hot liquid returned to the storage tank unit 2 in the hot liquid circulation return path 13b2 for low temperature heating or It is possible to recirculate the whole from the distribution valve 23 to the heating hot liquid circulation outward path 13a without passing through the storage tank 11 (via the bypass path 24).

The distribution valve 23 may be interposed at a connection point between the bypass path 24 and the heating hot liquid circulation outward path 13a.

In the following description, the operating state (outlet on the bypass path 24 side) in which all of the hot liquid flowing into the inlet port of the distribution valve 23 flows out from one outlet port communicating with the hot liquid circulation return path 13b2 for low temperature heating on the downstream side. The operation state in which the port is fully closed and the outlet port on the storage tank 11 side is fully open) is in the bypass OFF state of the distribution valve 23, and all of the hot liquid flowing into the inlet port of the distribution valve 23 communicates with the bypass path 24. The operating state of outflow from the other outlet port (the operating state in which the outlet port on the bypass path 24 side is fully open and the outlet port on the storage tank 11 side is fully closed) is the bypass ON state of the distribution valve 23 and the inlet port of the distribution valve 23. A state in which a part of the hot liquid flowing into the hot liquid flows out from each of both outlet ports is called a bypass intermediate state of the distribution valve 23.

Further, two temperature sensors 25 and 26 are mounted in the storage tank unit 2 on the hot liquid circulation outward path 13a for heating, and one temperature sensor 27 is mounted on the hot liquid circulation return path 13b2 for low temperature heating. ..

The temperature sensor 25 is a sensor that detects the temperature of the hot liquid flowing from the storage tank 11 (or the hot liquid circulation return path 12b for heat storage) into the hot liquid circulation outward path 13a for heating, and is one of the hot liquid circulation outward paths 13a for heating. It is attached to a portion on the upstream side of the confluence of the bypass road 24.

The temperature sensor 26 is a sensor that detects the temperature of the hot liquid sent from the storage tank unit 2 to the heating terminal unit 5 side, and is on the downstream side of the hot liquid circulation outward path 13a for heating from the confluence of the bypass path 24. It is attached to the part of. The detected temperature of the temperature sensor 26 coincides with or substantially coincides with the detected temperature of the temperature sensor 25 in the bypass OFF state of the distribution valve 23.

On the other hand, in the bypass ON state or the bypass intermediate state of the distribution valve 23, the temperature detected by the temperature sensor 26 is changed to the hot liquid flowing from the storage tank 11 (or the hot liquid circulation return path 12b for heat storage) into the hot liquid circulation outward path 13a for heating. , The temperature of the hot liquid after mixing all or part of the hot liquid returned from the heating terminal unit 5 side with the storage tank unit 2 (the temperature lower than the temperature detected by the temperature sensor 25).

The temperature sensor 27 mounted on the hot liquid circulation return path 13b2 for low-temperature heating is a sensor that detects the temperature of the hot liquid returned from the heating terminal unit 5 side to the storage tank unit 2, and is a sensor for detecting the temperature of the hot liquid returned from the heating terminal unit 5 side. Of these, it is mounted on the upstream side of the distribution valve 23 and near the heating terminal unit 5.

The heat pump unit 3 is a unit installed outdoors. The heat pump 31 mounted on the heat pump unit 3 is a heat source machine for heating the hot liquid in the storage tank 11 of the storage tank unit 2.

The heat pump 31 has a known structure, and is a refrigerant circulation flow path 32 that circulates an alternative CFC such as hydrofluorocarbon (HFC) or a refrigerant such as carbon dioxide, and evaporation mounted on the refrigerant circulation flow path 32. It has a vessel 33, a compressor 34, a condenser 35, an expansion mechanism 36, and a rotary fan 37 that supplies outside air (air) to the evaporator 33.

The evaporator 33 exchanges heat between the refrigerant flowing through the refrigerant circulation flow path 32 and the outside air (air) supplied by the rotation of the rotating fan 37.

The compressor 34 produces a high-temperature, high-pressure refrigerant by compressing the refrigerant supplied from the evaporator 33.

As described above, the condenser 35 is connected to the downstream end of the heat storage hot liquid circulation outward path 12a and the upstream end of the heat storage hot liquid circulation return path 12b.

Then, the condenser 35 contains the high-temperature and high-pressure refrigerant supplied from the compressor 34 and the hot liquid supplied from the storage tank 11 via the heat storage hot liquid circulation outward path 12a by the operation of the heat storage circulation pump 18. By performing heat exchange, the hot liquid is heated, and the heated hot liquid is circulated to the storage tank 11 via the heat storage hot liquid circulation return path 12b.

The expansion mechanism 36 is composed of an expansion valve or the like, and further cools the heat-dissipated refrigerant supplied from the condenser 35 by adiabatic expansion, and sends the cooled refrigerant to the evaporator 33.

By the operation of the above-mentioned evaporator 33, compressor 34, condenser 35, and expansion mechanism 36, the hot liquid supplied from the storage tank 11 to the condenser 35 is heat-exchanged and heated, and the hot liquid after heating is heated. It is returned to the storage tank 11. As a result, the hot liquid in the storage tank 11 is heated, and the hot liquid is stored in heat.

In the present embodiment, the heating terminal unit 5 includes a high temperature side heating terminal 5H having a relatively high hot liquid temperature required for operation and a low temperature side heating terminal 5H having a hot liquid temperature required for operation lower than that of the high temperature side heating terminal 5H. It is equipped with a terminal 5L.

The high temperature side heating terminal 5H is, for example, a bathroom heating device, and the hot liquid temperature required by the high temperature side heating terminal 5H is, for example, about 80 ° C. Further, the low temperature side heating terminal 5L is, for example, a floor heating device, and the hot liquid temperature required by the low temperature side heating terminal 5L is, for example, about 60 ° C.

These high temperature side heating terminal 5H and low temperature side heating terminal 5L are connected to hot liquid flow paths 42H and 42L, which will be described later, so that hot liquid is supplied from the combustion type heat source unit 4. Further, the high temperature side heating terminal 5H and the low temperature side heating terminal 5L are located at the upstream ends of the high temperature heating hot liquid circulation return path 13b1 and the low temperature heating hot liquid circulation return path 13b2 so as to recirculate the hot liquid radiated by each. They are connected in parallel.

The high temperature side heating terminal 5H is provided with a temperature sensor 5HS, and the low temperature side heating terminal 5L is provided with a temperature sensor 5LS.

The high temperature side heating terminal 5H is provided with a high temperature terminal on-off valve 5HV, and the low temperature side heating terminal 5L is provided with a low temperature terminal on / off valve 5LV. The drive of the high-temperature side heating terminal 5H, the low-temperature side heating terminal 5L, the high-temperature terminal on-off valve 5HV, and the low-temperature terminal on-off valve 5LV is controlled by the terminal control unit 38. The terminal control unit 38 has a control circuit unit composed of a CPU, RAM, ROM, and the like. The low temperature terminal on-off valve 5LV may not be provided.

When the operation of the high temperature side heating terminal 5H is stopped, the terminal control unit 38 closes the high temperature terminal on-off valve 5HV and blocks the inflow of hot liquid from the combustion type heat source unit 4 to the high temperature side heating terminal 5H. I try to do it. Similarly, when the operation of the low temperature side heating terminal 5L is stopped, the terminal control unit 38 closes the low temperature terminal on-off valve 5LV and sends hot liquid from the combustion type heat source unit 4 to the low temperature side heating terminal 5L. I try to block the inflow. When the low temperature terminal on-off valve 5LV is not provided, when the operation of the low-temperature side heating terminal 5L is stopped, the low-temperature heating flow path on-off valve 42LV, which will be described later, is closed and the combustion type heat source unit 4 to the low-temperature side heating terminal. The inflow of hot liquid into the machine 5L is blocked.

In FIG. 1, the high temperature side heating terminal 5H and the low temperature side heating terminal 5L are typically described one by one, but the high temperature side heating terminal 5H or the low temperature side heating terminal 5L is attached to the heating device 1. A plurality of units may be provided. A plurality of high-temperature side heating terminals 5H are connected in parallel to the high-temperature side heating hot liquid flow path 42H on the upstream side, which will be described later. Similarly, a plurality of low temperature side heating terminals 5L are connected in parallel to the hot liquid flow path 42L on the upstream side, which will be described later.

The combustion type heat source unit 4 heats the combustion type heat source unit 41 (auxiliary heat source) and the hot liquid sent in the heating hot liquid circulation outbound route 13a by the combustion type heat source unit 41 as needed, and heats the heating terminal. It is a flow path for supplying to the unit 5, and is provided with a heating hot liquid flow path 42 that is continuous on the downstream side of the heating hot liquid circulation outward path 13a.

The combustion type heat source machine 41 includes a burner 44 for burning fuel, a main heat exchanger 45 for heating a hot liquid with heat generated by the combustion operation of the burner 44, and an auxiliary heat exchanger 46.

The fuel to be burned by the burner 44 is a fuel gas such as city gas or LP gas. During the combustion operation of the burner 44, fuel gas is supplied to the burner 44 via a fuel supply mechanism including an electromagnetic on-off valve, a proportional valve, or the like (not shown). Further, combustion air is supplied to the burner 44 by a fan (not shown). Then, by igniting the fuel gas supplied to the burner 44 with an igniter such as an igniter (not shown), the burner 44 is burned.

The configuration of the fuel supply mechanism and the like related to the combustion operation of the burner 44 may be known. Further, the burner 44 is not limited to the fuel gas, and may burn a liquid fuel such as kerosene.

The main heat exchanger 45 is a sensible heat endothermic heat exchanger that absorbs sensible heat from the combustion exhaust of the burner 44 and heats a hot liquid by the sensible heat. Further, the auxiliary heat exchanger 46 is a latent heat endothermic type auxiliary heat exchanger that absorbs latent heat when water vapor in combustion exhaust that has passed through the main heat exchanger 45 condenses, and heats a hot liquid by the latent heat. Is.

The combustion type heat source machine 41 may include only the main heat exchanger 45 of the main heat exchanger 45 and the auxiliary heat exchanger 46.

The upstream end of the heating hot liquid flow path 42 is communicated with the downstream end of the heating hot liquid circulation outward path 13a, and the hot liquid flowing through the heating hot liquid circulation outward path 13a flows into the hot liquid flow path 42 for heating.

The upstream end of the heating hot liquid flow path 42 is also connected to an expansion tank (not shown) that absorbs the volume increase of the hot hot liquid.

The hot liquid flow path 42 for heating is configured to pass through the auxiliary heat exchanger 46 of the combustion type heat source machine 41 in the combustion type heat source machine unit 4, and further, on the downstream side of the auxiliary heat exchanger 46. It is divided into a hot liquid flow path 42H for heating on the high temperature side and a hot liquid flow path 42L for heating on the low temperature side.

The hot liquid flow path 42H for heating on the high temperature side is a hot liquid flow path for supplying hot liquid to the heating terminal 5H on the high temperature side of the heating terminal unit 5. The hot liquid flow path 42H for heating on the high temperature side is passed through the main heat exchanger 45 of the combustion type heat source machine 41, and the heating terminal 5H on the high temperature side is connected to the downstream end thereof.

The low temperature side heating hot liquid flow path 42L is a hot liquid flow path for supplying hot liquid to the low temperature side heating terminal 5L of the heating terminal unit 5. A low temperature side heating terminal 5L is connected to the downstream end of the low temperature side heating hot liquid flow path 42L.

A low temperature heating flow path on-off valve 42LV is attached to the low temperature side heating hot liquid flow path 42L. The opening and closing of the low-temperature heating flow path on-off valve 42LV is controlled by the on-off valve control unit 48. An on-off valve is not attached to the hot liquid flow path 42H for heating on the high temperature side.

In the hot liquid flow path 42 for heating, a heating circulation pump 51 that generates a flow of hot liquid from the upstream side to the downstream side of the hot liquid flow path 42 for heating is provided for heating the high temperature side of the hot liquid flow path 42 for heating. It is installed on the upstream side of the branch point to the hot liquid flow path 42H and the hot liquid flow path 42L for heating on the low temperature side.

Further, in the high temperature side heating hot liquid flow path 42H, a temperature sensor that detects the temperature of the hot liquid flowing into the high temperature side heating hot liquid flow path 42H from the main heating hot liquid flow path 42 on the upstream side thereof. The 54 and the temperature sensor 55 that detects the temperature of the hot liquid flowing out of the main heat exchanger 45 are mounted.

In the example of the present embodiment, the temperature sensor 54 is arranged at a position near the upstream end of the hot liquid flow path 42H for heating on the high temperature side, and the temperature sensor 55 is located near the main heat exchanger 45. It is located on the downstream side of.

In other words, the temperature detected by the temperature sensor 54 is the temperature of the hot liquid supplied to the low temperature side heating terminal 5L, and the temperature detected by the temperature sensor 55 is, in other words, the high temperature side heating terminal. It is the temperature of the hot liquid supplied to 5H.

In the heating device 1 of the present embodiment, the storage tank unit 2 is equipped with a tank control unit 72, the heat pump unit 3 is equipped with a pump control unit 73, and the combustion type heat source unit 4 is equipped with a combustion control unit 74. ing.

Although not shown in detail, each of the control units 72 to 74 includes a control circuit unit and a power supply circuit unit. Each control circuit unit is a circuit unit composed of a CPU, RAM, ROM, etc., and is capable of communicating with each other.

Then, the control circuit unit of the tank control unit 72 of the storage tank unit 2 is the detection data of the temperature sensors 14a, 14b, 14c, 16, 22, 25, 26, 27 provided in the storage tank unit 2, or the heat pump unit. The operation of the distribution valve 23 is controlled by executing the program processing based on the communication data or the like given from the control circuit unit of the combustion type heat source unit 4 or the combustion type heat source unit 4. In the present embodiment, the tank control unit 72 corresponds to the distribution control unit.

Further, the control circuit unit of the pump control unit 73 of the heat pump unit 3 is from the detection data of the temperature sensors 19 and 20 provided in the heat pump unit 3, or the control circuit unit of the storage tank unit 2 or the combustion type heat source unit 4. The operation of the heat storage circulation pump 18, the rotary fan 37, the compressor 34, etc. is controlled by executing the program processing based on the given communication data or the like.

Further, the heat pump unit 3 is provided with an outside air temperature sensor (not shown) for detecting the outside air temperature, and the outside air temperature data detected by the outside air temperature sensor is sent to the control circuit unit of the pump control unit 73.

The control circuit unit of the combustion control unit 74 of the combustion heat source unit 4 has detection data of the temperature sensors 54 and 55 provided in the combustion heat source unit 4, or instruction data (heating operation) given from a remote control (not shown). By executing the program processing based on the instruction data) or the communication data given from the control circuit unit of the storage tank unit 2 or the heat pump unit 3, the combustion type heat source machine 41 and the heating circulation pump 51 Etc. are controlled.

The control circuit units of the control units 72 to 74 may be composed of one circuit board.

The power supply circuit units of the control units 72 to 74 are the actuators of the storage tank unit 2 (distribution valve 23, etc.) and the electronic devices of the heat pump unit 3 (heat storage circulation pump 18, compressor 34, rotary fan 37, etc.). ), A circuit unit that supplies power to each actuator (heating circulation pump 51, etc.) of the combustion type heat source unit 4.

In the heating device 1 of the present embodiment, normal household power or commercial power (hereinafter referred to as normal power) is supplied to the power supply circuit units of the control units 72 to 74 as power supply power for operation. It has become.

Further, in the present embodiment, a part of the electric power supplied to the power supply circuit unit of the tank control unit 72 of the storage tank unit 2 is used as the power supply electric power for the operation of the electrical components such as the distribution valve 23 of the storage tank unit 2. Will be done.

Next, the operation of the heating device 1 of the present embodiment will be described.

While normal power is being supplied to the tank control unit 72 of the storage tank unit 2 and the pump control unit 73 of the heat pump unit 3, the heat storage circulation pump 18 and the heat pump 31 are controlled by the control process of the control circuit unit of the pump control unit 73. Driving is done.

As a result, the hot liquid in the storage tank 11 is heated to a predetermined temperature (for example, about 60 ° C.) while circulating via the condenser 35 in the hot liquid circulation outward path 12a for heat storage and the hot liquid circulation return path 12b for heat storage. , The heat of the hot liquid in the storage tank 11 is stored.

On the other hand, when it is instructed by the remote controller to perform the heating operation of the high temperature side heating terminal 5H or the low temperature side heating terminal 5L, the combustion control of the tank control unit 72 of the storage tank unit 2 and the combustion type heat source unit 4 The heating operation is performed by the control process of one control circuit unit of unit 74 or the cooperative control process of both control circuit units. When the combustion type heat source machine 41 or the heating circulation pump 51 is operating, the control circuit unit of the combustion control unit 74 transmits combustion operation data indicating that fact to the on-off valve control unit 48.

When the terminal control unit 38 is instructed to perform the heating operation of the high temperature side heating terminal 5H, the terminal control unit 38 may open the high temperature terminal on-off valve 5HV and perform the heating operation of the low temperature side heating terminal 5L. When instructed, the low temperature terminal on-off valve 5LV is controlled to be opened.

Specifically, the heating operation when the heat pump 31 is operable is performed as follows. The operation of the heat pump 31 is performed when the heating operation of the low temperature side heating terminal 5L is instructed.

First, the heating set temperature, which is the target temperature of the hot liquid (heating medium) to be supplied to the heating terminal unit 5, is set. In the present embodiment, the heating required temperature of the heating terminal having the highest required heating temperature (the temperature of the hot liquid required for the heating operation) among the heating terminals 5H and 5L instructed to perform the heating operation. Is set as the heating set temperature.

Therefore, for example, heating of both a high-temperature side heating terminal 5H such as a bathroom heating device having a required heating temperature of 80 ° C and a low-temperature side heating terminal 5L such as a floor heating device having a required heating temperature of 60 ° C. When it is instructed to perform the operation, or when it is instructed to perform the heating operation only for the high temperature side heating terminal 5H, the heating set temperature is set to 80 ° C.

Further, for example, when it is instructed to perform the heating operation of only the low temperature side heating terminal 5L, the heating set temperature is set to 60 ° C.

If the operation priority of the heating terminals 5H and 5L is separately specified by the user or the like, the heating required temperature of the heating terminal having the highest priority is set as the heating set temperature. You may. In that case, even if it is instructed to perform heating operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, the required heating temperature (60 °) for the low temperature side heating terminal 5L C) may be set as the heating set temperature.

With the heating set temperature set in this way, the heating circulation pump 51 of the combustion type heat source unit 4 is operated, and the hot liquid is circulated in the heating hot liquid circulation outward path 13a and the heating hot liquid circulation return path 13b. Is done. Further, the distribution valve 23 is maintained in the bypass OFF state or the bypass intermediate state. The distribution valve 23 may be set to the bypass ON state.

The hot liquid supplied from the storage tank unit 2 to the combustion type heat source unit 4 flows into the main heating hot liquid flow path 42 of the combustion type heat source unit 4 from the heating hot liquid circulation outward path 13a. Then, during the operation of the high temperature side heating terminal 5H, the hot liquid is supplied to the high temperature side heating terminal 5H from the main heating hot liquid flow path 42 via the high temperature side heating hot liquid flow path 42H. Further, during operation of the low temperature side heating terminal 5L, hot liquid is supplied to the low temperature side heating terminal 5L from the main heating hot liquid flow path 42 via the low temperature side heating hot liquid flow path 42L.

When both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L are in operation, the main heating hot liquid flow path 42 to the high temperature side heating hot liquid flow path 42H and the low temperature side heating hot liquid flow path 42L. The hot liquid is supplied to both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L via the above.

At this time, in the combustion type heat source unit 4, the temperature of the hot liquid supplied from the heating hot liquid flow path 42 to the heating terminal unit 5 side (detected temperature of the temperature sensors 54 and 55) is set as the heating set temperature. The combustion type heat source machine 41 is maintained in an operation stopped state (a state in which the burning operation of the burner 44 is not performed) when the temperature is substantially the same within the permissible range of.

On the other hand, when the temperature of the hot liquid supplied from the hot liquid flow path 42 for heating to the heating terminal unit 5 side (the temperature detected by the temperature sensors 54 and 55) deviates from the predetermined allowable range and is lower than the heating set temperature. The temperature of the hot liquid supplied to the high temperature side heating terminal 5H through the high temperature side heating hot liquid flow path 42H (detected temperature of the temperature sensor 55) or the low temperature side heating terminal at the low temperature side heating hot liquid flow path 42L. The burning operation of the burner 44 of the combustion type heat source machine 41 is performed so that the temperature of the hot liquid supplied to the machine 5L (the temperature detected by the temperature sensor 54) substantially matches the heating set temperature within a predetermined allowable range. ..

In this case, the temperature detected by the temperature sensor 55 is within the predetermined allowable range during the heating operation of only the high temperature side heating terminal 5H or during the operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L. The amount of combustion of the burner 44 is controlled so as to substantially match the heating set temperature. Further, during the heating operation of only the low temperature side heating terminal 5L, the combustion amount of the burner 44 is controlled so that the detection temperature of the temperature sensor 54 substantially matches the heating set temperature within a predetermined allowable range.

As described above, the heating terminal 5H, which performs the heating operation of the hot liquid that matches or substantially matches the heating set temperature without heating the hot liquid supplied from the storage tank unit 2 side by the combustion operation of the burner 44, In the situation where it can be supplied to 5L, the hot liquid supplied from the storage tank unit 2 side is directly supplied to the heating terminal that performs the heating operation among the heating terminals 5H and 5L.

Further, when the temperature of the hot liquid supplied from the storage tank unit 2 side is lower than the predetermined allowable range with respect to the heating set temperature, the shortage is caused by the combustion operation of the burner 44 of the combustion type heat source machine 41. The amount of heat is added to the hot liquid. Then, the hot liquid to which the insufficient amount of heat is added and the temperature is raised to a temperature that matches or almost matches the heating set temperature is supplied to the heating terminal that performs the heating operation among the heating terminals 5H and 5L. Will be done.

Then, the hot liquid supplied to one or both of the heating terminals 5H and 5L in this way is supplied from the heating terminals 5H and 5L to the hot liquid circulation return path 13b1 for high temperature heating, the hot liquid circulation return path 13b2 for low temperature heating, and It is circulated to the heating hot liquid circulation outward path 13a via the bypass path 24.

The above is the operation of the heating operation when the heat pump 31 can be operated.

Next, the heating operation in the state where the heat pump 31 is inoperable is performed as follows.

First, the heating set temperature is set in the same manner as in the case of the heating operation when the heat pump 31 can be operated.

Further, the distribution valve 23 is maintained in the bypass ON state (a state in which the outlet port on the bypass path 24 side of the distribution valve 23 is fully opened and the outlet port on the storage tank 11 side is fully closed). That is, the entire amount of the hot liquid returned to the storage tank unit 2 via the low-temperature heating hot liquid circulation return path 13b2 passes through the bypass path 24 from the distribution valve 23 without passing through the storage tank 11, and the heating hot liquid The distribution valve 23 is controlled so as to recirculate in the circulation outward path 13a.

With the distribution valve 23 controlled to the bypass ON state as described above, the heating circulation pump 51 is operated, and the heating hot liquid circulation outward path 13a and the low temperature heating hot liquid circulation return path 13b2 (storage tank 11 rather than the bypass path 24). The hot liquid is circulated through the hot liquid circulation return path 13b2 for low temperature heating on the side) and the bypass path 24.

Then, the hot liquid supplied to the combustion type heat source unit 4 via the heating hot liquid circulation outward path 13a is burned from the heating hot liquid circulation outward path 13a in the same manner as in the heating operation when the heat pump 31 can be operated. It flows into the hot liquid flow path 42 for heating which is the main body of the heat source unit 4, and further heats via one or both of the hot liquid flow path 42H for high temperature side heating and the hot liquid flow path 42L for low temperature side heating. It is supplied to one or both of the terminals 5H and 5L.

At this time, in the combustion type heat source unit 4, the temperature of the hot liquid supplied to the high temperature side heating terminal 5H through the high temperature side heating hot liquid flow path 42H (the temperature detected by the temperature sensor 55) or the low temperature side heating temperature. The combustion type heat source machine 41 so that the temperature of the hot liquid (detected temperature of the temperature sensor 54) supplied to the low temperature side heating terminal 5L in the liquid flow path 42L substantially matches the heating set temperature within a predetermined allowable range. Burning operation of the burner 44 is performed.

In this case, the temperature detected by the temperature sensor 55 is within the predetermined allowable range during the heating operation of only the high temperature side heating terminal 5H or during the operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L. The amount of combustion of the burner 44 is controlled so as to substantially match the heating set temperature. Further, during the heating operation of only the low temperature side heating terminal 5L, the combustion amount of the burner 44 is controlled so that the detection temperature of the temperature sensor 54 substantially matches the heating set temperature within a predetermined allowable range.

As described above, in the heating operation in the state where the heat pump 31 is inoperable, the temperature control of the hot liquid supplied to the heating terminal unit 5 is controlled by the combustion type heat source machine while the distribution valve 23 is controlled to the bypass ON state. It is performed by controlling the combustion operation of the burner 44 of 41.

The above is the operation of the heating operation in the state where the heat pump 31 is inoperable.

When the heat pump 31 is inoperable, the hot liquid in the storage tank 11 cannot be appropriately heated by the heat pump 31, so that the hot liquid in the storage tank 11 eventually becomes higher than the heating set temperature due to natural heat dissipation or the like. Will drop to a low temperature.

In such a situation, if the hot liquid for the heating operation is circulated via the storage tank 11, the hot liquid returning from the heating terminal unit 5 to the storage tank unit 2 cools in the storage tank 11. Heat exchange with the hot liquid causes unnecessary heat dissipation, and the heat loss of the hot liquid increases.

However, in the present embodiment, when the hot liquid in the storage tank 11 is cold, the hot liquid returning from the heating terminal unit 5 to the storage tank unit 2 passes through the bypass path 24 without passing through the storage tank 11. After flowing through, it is supplied to the combustion type heat source unit 4 side.

Therefore, the heat loss of the hot liquid in the storage tank unit 2 is minimized by minimizing the heat dissipation of the hot liquid circulating via the combustion type heat source unit 4 and the heating terminal unit 5. Can be reduced. As a result, the amount of combustion of the burner 44 of the combustion type heat source unit 4 can be suppressed.

[Normal connection judgment: High temperature side heating terminal]
In the heating device 1, after the installation work, it is determined whether or not the high temperature side heating hot liquid flow path 42H and the high temperature heating hot liquid circulation return path 13b1 are in a normal connection state connected to the high temperature side heating terminal 5H. Make a normal connection judgment.

As shown in FIG. 2, in the normal connection determination, first, a trial run of the high temperature side heating terminal 5H is performed (STEP 1). In this trial run, the hot liquid is not heated by the combustion type heat source machine 41, the terminal control unit 38 opens the high temperature terminal on-off valve 5HV, and the on-off valve control unit 48 opens the low-temperature heating flow path on-off valve 42LV. The valve is opened, and the combustion control unit 74 controls to turn on the heating circulation pump 51. The low temperature terminal on-off valve 5LV may be in either a valve open state or a valve closed state.

The terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5HS of the high temperature side heating terminal 5H is less than a predetermined temperature (for example, 50 ° C.) (STEP 2).

When it is determined that the temperature detected by the temperature sensor 5HS is less than 50 ° C (“YES” in STEP 2), the tank control unit 72 is a hot liquid for low temperature heating in which the hot liquid from the low temperature side heating terminal 5L flows. It is determined whether or not the temperature detected by the temperature sensor 27 provided on the circulation return path 13b2 is less than a predetermined temperature (for example, 50 ° C.) (STEP 3). If it is determined that the temperature detected by the temperature sensor 5HS is not less than 50 ° C (“NO” in STEP2), STEP2 is performed again.

When it is determined that the temperature detected by the temperature sensor 27 is less than 50 ° C (“YES” in STEP 3), the terminal control unit 38 stores the current temperature detected by the temperature sensor 5HS in a memory (not shown). The tank control unit 72 stores the temperature detected by the temperature sensor 27 at the present time in the memory (STEP 4).

On the other hand, when it is determined that the temperature detected by the temperature sensor 27 is not less than 50 ° C (“NO” in STEP 3), the tank control unit 72 determines that the temperature detected by the temperature sensor 5HS is less than 50 ° C. The time after the determination is measured by a timer (not shown), and it is determined whether or not a predetermined time (for example, 10 minutes) has elapsed (STEP 5).

If it is determined that 10 minutes have passed (“YES” in STEP 5), STEP 4 is performed, and if it is determined that 10 minutes have not passed (“NO” in STEP 5), STEP 3 is performed again.

After storing the temperature detected by the current temperature sensor 5HS and the temperature sensor 27 (STEP 4), heating combustion is started (STEP 6). In this heating combustion, the heating set temperature is set to, for example, 80 ° C., the combustion control unit 74 drives the combustion type heat source machine 41 so as to heat the hot liquid to 80 ° C., and the low temperature heating flow path on-off valve 42LV Is controlled to close the valve.

After the start of heating combustion, the terminal control unit 38 added the temperature detected by the temperature sensor 5HS to the detection temperature of the temperature sensor 5HS stored in the memory (hereinafter referred to as the terminal storage temperature before the start of heating combustion) by 10 ° C. It is determined whether or not the temperature is above the temperature (STEP 7).

When it is determined that the temperature detected by the temperature sensor 5HS is equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5HS (“YES” in STEP 7), the tank control unit 72 determines the temperature. It is determined whether or not the temperature detected by the sensor 27 is less than the temperature detected by the temperature sensor 27 stored in the memory (hereinafter referred to as the return storage temperature before the start of heating combustion) plus 5 ° C. STEP8).

When the tank control unit 72 determines that the temperature detected by the temperature sensor 27 is less than the temperature obtained by adding 5 ° C to the return storage temperature before the start of heating combustion (“YES” in STEP 8), the hot liquid for heating on the high temperature side It is determined that the flow path 42H and the hot liquid circulation return path 13b1 for high temperature heating are in a normal connection state connected to the high temperature side heating terminal 5H, and that fact is displayed on the remote controller (STEP 9).

On the other hand, when it is determined that the temperature detected by the temperature sensor 5HS is not equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5HS (“NO” in STEP 7), or when the temperature sensor 27 determines. When it is determined that the detected temperature is not less than the temperature obtained by adding 5 ° C to the return storage temperature before the start of heating combustion of the temperature sensor 27 (“NO” in STEP 8), the tank control unit 72 starts heating combustion. It is determined whether or not a predetermined time (for example, 10 minutes) has elapsed from the time measured by the timer (STEP 10).

If it is determined that 10 minutes have not passed (“NO” in STEP 10), STEP 7 is performed again.

When it is determined that 10 minutes have passed (“YES” in STEP 10), the high temperature side heating hot liquid flow path 42H and the high temperature heating hot liquid circulation return path 13b1 are normally connected to the high temperature side heating terminal 5H. It is determined that there is no erroneous connection, and a message to that effect is displayed on the remote controller (STEP 11).

In the present embodiment, when the hot liquid flow path 42H for high temperature heating and the hot liquid circulation return path 13b1 for high temperature heating are connected to the high temperature side heating terminal 5H, the high temperature terminal on-off valve 5HV is opened and the low-temperature terminal is opened and closed. With the valve 5LV controlled to the closed state, the hot liquid is heated to 80 ° C by the combustion type heat source machine 41, and the low temperature heating flow path on-off valve 42LV is closed (STEP 6). The hot liquid is sent to the high temperature side heating terminal 5H through the hot liquid flow path 42H for high temperature side heating. As a result, the temperature detected by the temperature sensor 5HS becomes 80 ° C, and the temperature detected by the temperature sensor 5HS (80 ° C) is the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion (for example, 49 ° C). It is determined that the temperature is 59 ° C) or higher (“YES” in STEP 7).

Further, since the low temperature heating flow path on-off valve 42LV is in the closed state, hot liquid does not flow from the low temperature side heating hot liquid flow path 42L to the low temperature side heating terminal 5L, and also on the low temperature heating hot liquid circulation return path 13b2. Hot liquid does not flow. As a result, the temperature detected by the temperature sensor 27 does not rise at 49 ° C (“YES” in STEP 8), and the tank control unit 72 has the hot liquid flow path 42H for high temperature heating and the hot liquid circulation return path for high temperature heating. It is determined that 13b1 is in a normal connection state connected to the high temperature side heating terminal 5H, and a message to that effect is displayed on the remote controller (STEP 9).

On the other hand, as shown in FIG. 3, the high temperature side heating hot liquid flow path 42H is connected to the low temperature side heating terminal 5L, and the low temperature side heating hot liquid flow path 42L is connected to the high temperature side heating terminal 5H. In the case of the incorrect connection state, the hot liquid is heated to 80 ° C by the combustion type heat source machine 41 with the high temperature terminal on-off valve 5HV in the valve open state and the low temperature terminal on-off valve 5LV in the closed state. When the low-temperature heating flow path on-off valve 42LV is closed (STEP 6), hot liquid is not sent to the high-temperature side heating terminal 5H. This is because the low temperature heating flow path on-off valve 42LV provided in the low temperature side heating hot liquid flow path 42L connected to the high temperature side heating terminal 5H is in a closed state.

Therefore, the temperature detected by the temperature sensor 5HS does not rise (“NO” in STEP 7). When it is determined that 10 minutes have passed in this state (“YES” in STEP 10), the hot liquid flow path 42H for high temperature side heating is not normally connected to the high temperature side heating terminal 5H, which is an erroneous connection state. Is determined, and a message to that effect is displayed on the remote controller (STEP 11).

Further, as shown in FIG. 4, the hot liquid circulation return path 13b1 for high temperature heating is connected to the low temperature side heating terminal 5L, and the hot liquid circulation return path 13b2 for low temperature heating is connected to the high temperature side heating terminal 5H. In the case of, the hot liquid is heated to 80 ° C. by the combustion type heat source machine 41 with the high temperature terminal on-off valve 5HV in the valve open state and the low temperature terminal on-off valve 5LV in the valve closed state, and the low temperature heating flow. When the path on-off valve 42LV is closed (STEP 6), hot liquid at 80 ° C. is sent to the high temperature side heating terminal 5H through the hot liquid flow path 42H for high temperature side heating. As a result, the temperature detected by the temperature sensor 5HS becomes 80 ° C, and the temperature detected by the temperature sensor 5HS (80 ° C) is the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion (10 to 49 ° C). It is determined that the temperature is 59 ° C) or higher (“YES” in STEP 7).

However, since the hot liquid circulation return path 13b2 for low temperature heating is connected to the high temperature side heating terminal 5H, even if the heat is dissipated by the high temperature side heating terminal 5H and the temperature drops from 80 ° C, the high temperature side heating terminal A hot liquid of about 65 ° C flows from 5H to the hot liquid circulation return path 13b2 for low temperature heating. Therefore, the temperature detected by the temperature sensor 27 is about 65 ° C, and must be less than the temperature obtained by adding 5 ° C to the return storage temperature before the start of heating combustion (54 ° C, which is 49 ° C plus 5 ° C). It is determined (“NO” in STEP 8). When it is determined that 10 minutes have passed in this state (“YES” in STEP 10), it is determined that the hot liquid circulation return path 13b1 for high temperature heating is not normally connected to the high temperature side heating terminal 5H and is in an erroneous connection state. The determination is made and the remote controller is displayed to that effect (STEP 11).

Further, as shown in FIG. 5, by combining the states shown in FIGS. 3 and 4, the high temperature side heating hot liquid flow path 42H and the high temperature heating hot liquid circulation return path 13b1 are connected to the low temperature side heating terminal 5L, and the low temperature is low. When the hot liquid flow path 42L for side heating and the hot liquid circulation return path 13b2 for low temperature heating are in an erroneously connected state connected to the high temperature side heating terminal 5H, the temperature detected by the temperature sensor 5HS does not rise (in STEP 7). "NO"). When it is determined that 10 minutes have passed in this state (“YES” in STEP 10), the hot liquid flow path 42H for high temperature side heating is not normally connected to the high temperature side heating terminal 5H, which is an erroneous connection state. Is determined, and a message to that effect is displayed on the remote controller (STEP 11).

In this erroneous connection state, since the hot liquid is not sent to the high temperature side heating terminal 5H, the hot liquid does not flow to the hot liquid circulation return path 13b2 for low temperature heating. Therefore, the temperature detected by the temperature sensor 27 does not rise at 49 ° C.

[Normal connection judgment: Low temperature side heating terminal]
After the installation work, the heating device 1 performs a normal connection determination for determining whether or not the low temperature heating hot liquid circulation return path 13b2 is connected to the low temperature side heating terminal 5L in a normal connection state.

As shown in FIG. 6, in the normal connection determination, first, a trial run of the low temperature side heating terminal 5L is performed (STEP 21). In this trial run, the hot liquid is not heated by the combustion type heat source machine 41, and the terminal control unit 38 closes the high temperature terminal on-off valve 5HV and opens the low-temperature terminal on-off valve 5LV. 48 opens the low-temperature heating flow path on-off valve 42LV, and the combustion control unit 74 controls to turn on the heating circulation pump 51.

The terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5LS of the low temperature side heating terminal 5L is less than a predetermined temperature (for example, 50 ° C.) (STEP 22).

When it is determined that the temperature detected by the temperature sensor 5LS is less than 50 ° C (“YES” in STEP 22), the tank control unit 72 determines that the temperature detected by the temperature sensor 27 is a predetermined temperature (for example, 50 ° C). It is determined whether or not it is less than (STEP23). If it is determined that the temperature detected by the temperature sensor 5LS is not less than 50 ° C (“NO” in STEP22), STEP22 is performed again.

When it is determined that the temperature detected by the temperature sensor 27 is less than 50 ° C (“YES” in STEP 23), the terminal control unit 38 stores the current temperature detected by the temperature sensor 5LS in a memory (not shown). The tank control unit 72 stores the temperature detected by the temperature sensor 27 at the present time in the memory (STEP 24).

On the other hand, when it is determined that the temperature detected by the temperature sensor 27 is not less than 50 ° C (“NO” in STEP 23), the tank control unit 72 determines that the temperature detected by the temperature sensor 5LS is less than 50 ° C. The time after the determination is measured by a timer, and it is determined whether or not a predetermined time (for example, 10 minutes) has elapsed (STEP 25).

If it is determined that 10 minutes have passed (“YES” in STEP 25), STEP 24 is performed, and if it is determined that 10 minutes have not passed (“NO” in STEP 25), STEP 23 is performed again.

In the heating combustion of STEP 26, the heating set temperature is set to 80 ° C, for example, and the combustion control unit 74 drives the combustion type heat source machine 41 so as to heat the hot liquid to 80 ° C, and the low temperature heating flow path on-off valve. Control is performed to maintain 42LV in the valve open state.

After the start of heating combustion, the terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5LS is equal to or higher than the temperature stored in the memory of the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS plus 10 ° C. Judgment (STEP27).

When it is determined that the temperature detected by the temperature sensor 5LS is equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS (“YES” in STEP 27), the tank control unit 72 determines the temperature. It is determined whether or not the temperature detected by the sensor 27 is equal to or higher than the temperature stored in the memory, which is the temperature obtained by adding 10 ° C to the stored temperature before the start of heating and combustion of the temperature sensor 27 (STEP 28).

When the tank control unit 72 determines that the temperature detected by the temperature sensor 27 is equal to or higher than the temperature obtained by adding 10 ° C to the return storage temperature before the start of heating combustion of the temperature sensor 27 (“YES” in STEP 28), the low temperature heating It is determined that the hot liquid circulation return path 13b2 is in a normal connection state connected to the low temperature side heating terminal 5L, and a message to that effect is displayed on the remote control (STEP29).

On the other hand, when it is determined that the temperature detected by the temperature sensor 5LS is not equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS (“NO” in STEP 27), or when the temperature sensor 27 determines. When it is determined that the detected temperature is not equal to or higher than the temperature obtained by adding 10 ° C to the return storage temperature before the start of heating combustion of the temperature sensor 27 (“NO” in STEP 28), the tank control unit 72 starts heating combustion. It is determined whether or not a predetermined time (for example, 10 minutes) has elapsed from the time measured by the timer (STEP 30).

If it is determined that 10 minutes have not passed (“NO” in STEP 30), STEP 27 is performed again.

When it is determined that 10 minutes have passed (“YES” in STEP 30), it is determined that the hot liquid circulation return path 13b2 for low temperature heating is not normally connected to the low temperature side heating terminal 5L and is in an erroneous connection state. This is displayed on the remote controller (STEP 31).

In the present embodiment, when the hot liquid circulation return path 13b2 for low temperature heating is connected to the low temperature side heating terminal 5L, the hot liquid is heated to 80 ° C by the combustion type heat source machine 41, and the low temperature heating flow path on-off valve 42LV When the valve is maintained in the valve open state (STEP 26), the hot liquid at 80 ° C. passes through the hot liquid flow path 42L for low temperature side heating (see FIG. 1) or the hot liquid flow path 42H for high temperature side heating (see FIG. 3). Is sent to the low temperature side heating terminal 5L. As a result, the temperature detected by the temperature sensor 5LS becomes 80 ° C, and the temperature detected by the temperature sensor 5LS (80 ° C) is the temperature (49) obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS. It is determined that the temperature is 59 ° C) or higher, which is obtained by adding 10 ° C to ° C (“YES” in STEP 27).

Further, even if heat is dissipated by the low temperature side heating terminal 5L and the temperature drops from 80 ° C, a hot liquid of about 65 ° C flows from the low temperature side heating terminal 5L to the low temperature heating hot liquid circulation return path 13b2. Therefore, the temperature detected by the temperature sensor 27 is about 65 ° C, and the temperature detected by the temperature sensor 27 (65 ° C) is the temperature obtained by adding 10 ° C to the storage temperature before the start of heating combustion of the temperature sensor 27. It is determined that the temperature is 59 ° C, which is the sum of 49 ° C and 10 ° C) (“YES” in STEP 28), and the hot liquid circulation return path 13b2 for low temperature heating is connected to the low temperature side heating terminal 5L. Is determined, and a message to that effect is displayed on the remote control (STEP29).

On the other hand, as shown in FIGS. 4 and 5, the hot liquid circulation return path 13b1 for high temperature heating is connected to the low temperature side heating terminal 5L, and the hot liquid circulation return path 13b2 for low temperature heating is connected to the high temperature side heating terminal 5H. In the case of a misconnected state, the hot liquid is set to 80 ° C by the combustion type heat source machine 41 with the high temperature terminal on-off valve 5HV in the closed state and the low-temperature terminal on-off valve 5LV in the open state. When the low-temperature heating flow path on-off valve 42LV is maintained in the open state (STEP 26) by heating, the high-temperature terminal on-off valve 5HV of the high-temperature side heating terminal 5H to which the hot liquid circulation return path 13b2 for low-temperature heating is connected is in the closed state. Therefore, the hot liquid is not sent to the hot liquid circulation return path 13b2 for low temperature heating. Therefore, the temperature detected by the temperature sensor 27 does not rise (“NO” in STEP 28). When it is determined that this state has passed for 10 minutes (“YES” in STEP 30), the hot liquid circulation return path 13b2 for low temperature heating is not normally connected to the low temperature side heating terminal 5L, and the connection is incorrect. It is determined that there is, and a message to that effect is displayed on the remote controller (STEP31).

[Normal connection judgment: Low temperature side heating terminal]
After the installation work, the heating device 1 performs a normal connection determination for determining whether or not the low temperature side heating hot liquid flow path 42L is connected to the low temperature side heating terminal 5L in a normal connection state.

As shown in FIG. 7, in the normal connection determination, first, a trial run of the high temperature side heating terminal 5H is performed (STEP 41). In this trial run, the hot liquid is not heated by the combustion type heat source machine 41, the terminal control unit 38 opens the high temperature terminal on-off valve 5HV and the low-temperature terminal on-off valve 5LV, and the on-off valve control unit 48 heats the low temperature. The flow path on-off valve 42LV is opened, and the combustion control unit 74 controls to turn on the heating circulation pump 51.

The terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5LS of the low temperature side heating terminal 5L is less than a predetermined temperature (for example, 50 ° C.) (STEP 42). If it is determined that the temperature detected by the temperature sensor 5LS is not less than 50 ° C (“NO” in STEP42), STEP42 is performed again.

When it is determined that the temperature detected by the temperature sensor 5LS is less than 50 ° C (“YES” in STEP 42), the terminal control unit 38 stores the current temperature detected by the temperature sensor 5LS in a memory (not shown). Remember (STEP43).

In the heating combustion of STEP44, the heating set temperature is set to, for example, 80 ° C, and the combustion control unit 74 drives the combustion type heat source machine 41 so as to heat the hot liquid to 80 ° C, and the low temperature heating flow path on-off valve. Control is performed to close the 42LV.

After the start of heating combustion, the terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5LS is equal to or higher than the temperature stored in the memory of the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS plus 10 ° C. Judgment (STEP 45).

When the terminal control unit 38 determines that the temperature detected by the temperature sensor 5LS is equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS (“YES” in STEP 45), the temperature is low. It is determined that the hot liquid flow path 42L for side heating is not connected to the low temperature side heating terminal 5L and is in an erroneously connected state, and that fact is displayed on the remote control (STEP46).

On the other hand, when it is determined that the temperature detected by the temperature sensor 5LS is not equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS (“NO” in STEP 45), the terminal control unit 38 determines. It is determined whether or not the trial run of the high temperature side heating terminal 5H has been completed (STEP 47).

If it is determined that the test run of the high temperature side heating terminal 5H has not been completed (“NO” in STEP 47), STEP 45 is performed again.

When it is determined that the trial run of the high temperature side heating terminal 5H has been completed (“YES” in STEP 47), the low temperature side heating hot liquid flow path 42L is connected to the low temperature side heating terminal 5L in a normal connection state. Is determined, and a message to that effect is displayed on the remote controller (STEP48).

In the present embodiment, as shown in FIGS. 1 and 4, when the low temperature side heating hot liquid flow path 42L is connected to the low temperature side heating terminal 5L, the hot liquid is 80 ° C. by the combustion type heat source machine 41. When the low temperature heating flow path on-off valve 42LV is closed (STEP44), the hot liquid is not sent to the low temperature side heating terminal 5L. As a result, the temperature detected by the temperature sensor 5LS does not rise, and it is determined that the temperature detected by the temperature sensor 5LS is not equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5LS ( "NO" in STEP45). When it is determined that the trial run of the high temperature side heating terminal 5H is completed in this state (“YES” in STEP 47), the low temperature side heating hot liquid flow path 42L is connected to the low temperature side heating terminal 5L. It is determined that the state is in a state, and a message to that effect is displayed on the remote controller (STEP48).

On the other hand, as shown in FIGS. 3 and 5, the high temperature side heating hot liquid flow path 42H is connected to the low temperature side heating terminal 5L, and the low temperature side heating hot liquid flow path 42L is the high temperature side heating terminal. In the case of an erroneous connection connected to 5H, the hot liquid is heated to 80 ° C by the combustion type heat source machine 41 to close the low temperature heating flow path on-off valve 42LV (STEP44). Since the on-off valve 5LV is in the open state, hot liquid at 80 ° C. flows from the hot liquid flow path 42H for heating on the high temperature side to the heating terminal 5L on the low temperature side.

When a hot liquid of 80 ° C flows through the low temperature side heating terminal 5L, the temperature detected by the temperature sensor 5LS becomes 80 ° C, and the temperature detected by the temperature sensor 5LS (80 ° C) becomes the heating combustion of the temperature sensor 5LS. It is determined that the temperature is equal to or higher than the pre-start terminal storage temperature (for example, 49 ° C) plus 10 ° C (“YES” in STEP 45), and the low temperature side heating hot liquid flow path 42L becomes the low temperature side heating terminal 5L. It is determined that the connection is not connected, and the remote control is displayed to that effect (STEP46).

[Second Embodiment]
In the heating device 80 of the second embodiment shown in FIG. 8, the storage tank unit and the heat pump unit are not provided. The same components as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Further, the low temperature terminal on-off valve 5LV and the temperature sensor 5LS may not be provided.

The hot liquid circulation return path 13b1 for high temperature heating and the hot liquid circulation return path 13b2 for low temperature heating are connected to the hot liquid flow path 42 for heating. The hot liquid from the high temperature side heating terminal 5H and the low temperature side heating terminal 5L flows to the combustion type heat source unit 4.

[Normal connection judgment: High temperature side heating terminal]
After the installation work, the heating device 80 performs a normal connection determination for determining whether or not the hot liquid flow path 42H for heating on the high temperature side is connected to the heating terminal 5H on the high temperature side in a normal connection state.

As shown in FIG. 9, in the normal connection determination, first, a trial run of the high temperature side heating terminal 5H is performed (STEP 51). In this trial run, as in STEP 1, the combustion type heat source machine 41 does not heat the hot liquid, the terminal control unit 38 opens the high temperature terminal on-off valve 5HV, and the on-off valve control unit 48 heats the low temperature. The flow path on-off valve 42LV is opened, and the combustion control unit 74 controls to turn on the heating circulation pump 51. The low temperature terminal on-off valve 5LV may be in either a valve open state or a valve closed state.

The terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5HS of the high temperature side heating terminal 5H is less than a predetermined temperature (for example, 50 ° C.) (STEP 52).

When it is determined that the temperature detected by the temperature sensor 5HS is less than 50 ° C (“YES” in STEP 52), the terminal control unit 38 stores the current temperature detected by the temperature sensor 5HS in a memory (not shown). Remember (STEP53). If it is determined that the temperature detected by the temperature sensor 5HS is not less than 50 ° C (“NO” in STEP 52), STEP 52 is performed again.

In the heating combustion of STEP 54, the heating set temperature is set to, for example, 80 ° C, and the combustion control unit 74 drives the combustion type heat source machine 41 so as to heat the hot liquid to 80 ° C, and the low temperature heating flow path on-off valve. Control is performed so that 42LV is closed.

After the start of heating combustion, the terminal control unit 38 determines whether or not the temperature detected by the temperature sensor 5HS is equal to or higher than the temperature stored in the memory, which is 10 ° C added to the storage temperature of the terminal before the start of heating combustion of the temperature sensor 5HS. Judgment (STEP55).

When it is determined that the temperature detected by the temperature sensor 5HS is equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5HS (“YES” in STEP 55), the terminal control unit 38 is charged with a high temperature. It is determined that the hot liquid flow path 42H for side heating is in a normal connection state connected to the high temperature side heating terminal 5H, and that fact is displayed on the remote control (STEP56).

On the other hand, when it is determined that the temperature detected by the temperature sensor 5HS is not equal to or higher than the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion of the temperature sensor 5HS (“NO” in STEP 55), the terminal control unit 38 determines. It is determined whether or not a predetermined time (for example, 10 minutes) has elapsed from the time measured by the timer since the start of heating combustion (STEP 57).

If it is determined that 10 minutes have not passed (“NO” in STEP 57), STEP 55 is performed again.

When it is determined that 10 minutes have passed (“YES” in STEP 57), the terminal control unit 38 erroneously connects the hot liquid flow path 42H for high temperature side heating to the high temperature side heating terminal 5H. It is determined that the state is in a state, and a message to that effect is displayed on the remote controller (STEP58).

In the present embodiment, when the hot liquid flow path 42H for high temperature side heating is connected to the high temperature side heating terminal 5H, the hot liquid is heated to 80 ° C by the combustion type heat source machine 41, and the low temperature heating flow path on-off valve When the valve is closed at 42LV (STEP54), hot liquid at 80 ° C. is sent to the high temperature side heating terminal 5H through the hot liquid flow path 42H for high temperature side heating. As a result, the temperature detected by the temperature sensor 5HS becomes 80 ° C, and the temperature detected by the temperature sensor 5HS (80 ° C) is the temperature obtained by adding 10 ° C to the terminal storage temperature before the start of heating combustion (10 to 49 ° C). It is determined that the temperature is 59 ° C) or higher (“YES” in STEP 55), and the terminal control unit 38 has the high temperature side heating hot liquid flow path 42H connected to the high temperature side heating terminal 5H. It is determined that the connection is normal, and a message to that effect is displayed on the remote control (STEP56).

On the other hand, as shown in FIG. 10, the high temperature side heating hot liquid flow path 42H is connected to the low temperature side heating terminal 5L, and the low temperature side heating hot liquid flow path 42L is connected to the high temperature side heating terminal 5H. In the case of the misconnected state, the hot liquid is heated to 80 ° C. by the combustion type heat source machine 41, and the low temperature heating flow path on-off valve 42LV is closed (STEP 54). No hot liquid is sent to 5H. Therefore, the temperature detected by the temperature sensor 5HS does not rise (“NO” in STEP 55). When it is determined that 10 minutes have passed in this state (“YES” in STEP 57), the high temperature side heating hot liquid flow path 42H is not normally connected to the high temperature side heating terminal 5H, which is an erroneous connection state. Is determined, and a message to that effect is displayed on the remote controller (STEP58).

1 ... Heating device, 2 ... Storage tank unit, 3 ... Heat pump unit, 4 ... Combustion type heat source unit, 5 ... Heating terminal unit, 5H ... High temperature side heating terminal, 5L ... Low temperature side heating terminal, 11 ... Storage tank , 12a ... Hot liquid circulation return path for heat storage, 12b ... Hot liquid circulation return path for heat storage 12b, 13a ... Hot liquid circulation return path for heating, 13b ... Hot liquid circulation return path for heating, 13b1 ... Hot liquid circulation return path for high temperature heating, 13b2 ... Hot liquid circulation return path for low-temperature heating, 5HS, 5LS, 14a-14c, 16, 19, 20, 22, 25-27 ... temperature sensor, 23 ... distribution valve, 24 ... bypass path, 31 ... heat pump, 38 ... terminal control unit , 48 ... On-off valve control unit, 51 ... Heating circulation pump, 72 ... Tank control unit

Claims (3)

An auxiliary heat source that heats the heat medium,
A heat pump that heats the heat medium,
An auxiliary heat source flow path that distributes the heat medium heated by the heat pump to the auxiliary heat source, and
A high-temperature terminal inlet flow path that distributes the heat medium heated by the auxiliary heat source to the high-temperature heating terminal, and
A low-temperature terminal inlet flow path that distributes the heat medium heated by the auxiliary heat source to the low-temperature heating terminal, and
A high-temperature terminal outlet flow path for circulating a heat medium from the high-temperature heating terminal to the auxiliary heat source flow path,
A low-temperature terminal outlet flow path for circulating a heat medium from the low-temperature heating terminal to the heat pump,
A low-temperature heating flow path on-off valve that opens and closes the low-temperature terminal inlet flow path,
A high-temperature terminal on-off valve provided in the high-temperature heating terminal and controlling the inflow of heat medium from the high-temperature terminal inlet flow path to the high-temperature heating terminal.
The high temperature terminal temperature detecting means for detecting the temperature of the heat medium in the high temperature heating terminal, and
A low temperature terminal temperature detecting means for detecting the temperature of the heat medium in the low temperature heating terminal,
The low temperature outlet flow path temperature detecting means for detecting the temperature of the heat medium in the low temperature terminal outlet flow path,
When the high-temperature terminal on-off valve is opened, the low-temperature heating flow path on-off valve is closed, and the auxiliary heat source is driven to heat the heat medium, the temperature detected by the high-temperature terminal temperature detecting means is the same. The temperature detected by the low temperature outlet flow path temperature detecting means rises by the first predetermined temperature or more from before heating the heat medium by the auxiliary heat source, and rises by the second predetermined temperature or more than before heating the heat medium by the auxiliary heat source. If not, the normal connection determination means for determining and notifying that the high temperature terminal inlet flow path and the high temperature terminal outlet flow path are in a normal connection state connected to the high temperature heating terminal.
A heating device characterized by being provided with. In the heating device according to claim 1,
When the high temperature terminal on-off valve is closed, the low-temperature heating flow path on-off valve is opened, and the auxiliary heat source is driven to heat the heat medium, the normal connection determination means raises the low-temperature terminal temperature. The temperature detected by the detecting means rises by a third predetermined temperature or more than before heating the heat medium by the auxiliary heat source, and the temperature detected by the low temperature outlet flow path temperature detecting means is higher than before heating the heat medium by the auxiliary heat source. A heating device characterized in that when the temperature rises by a fourth predetermined temperature or more, it is determined that the low temperature terminal outlet flow path is in a normal connection state connected to the low temperature heating terminal, and a notification is given. In the heating device according to claim 1 or 2.
The normal connection determining means opens the high-temperature terminal on-off valve, closes the low-temperature heating flow path on-off valve, and drives the auxiliary heat source to heat the heat medium. When the temperature detected by the detection means does not rise by the fifth predetermined temperature or more than before the heating of the heat medium by the auxiliary heat source, the low temperature terminal inlet flow path is in a normal connection state connected to the low temperature heating terminal. A heating device characterized in determining and notifying.