JP2017096604A - Thermal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of automatically switching a thermal device to an operation mode suitable for a power supply from a storage battery when the power supply from a commercial power system is unavailable.SOLUTION: A thermal device which operates with a power supply from a commercial power system or a storage battery comprises: a heat pump heat source unit which heats a heat medium by consuming power; a combustion heat source unit which heats the heat medium by consuming fuel; a control unit which controls operation of the heat pump heat source unit and the combustion heat source unit; and a commercial power detection unit which detects a power supply from the commercial power system. The control unit: can switch an operation mode between a normal operation mode and a storage battery mode with power consumption thereof restricted compared to the normal operation mode; and switches the operation mode to the storage battery mode when the commercial power detection unit detects no power supply from the commercial power system in the normal operation mode.SELECTED DRAWING: Figure 3

Description

  The technology disclosed in this specification relates to a thermal apparatus.

  Patent Document 1 discloses a thermal apparatus that operates with power supplied from a commercial power system or a storage battery.

JP2013-88060A

  In a general storage battery, for example, when power is not supplied from a commercial power system such as a power failure, the storage battery performs a self-sustained operation, and the storage battery supplies power instead of the commercial power system. Usually, a storage battery is provided with a protection circuit that cuts off discharge when the electric power to be discharged becomes equal to or higher than the upper limit discharge electric power. If power is not supplied from the commercial power system and the discharge from the storage battery is interrupted, power is not supplied to not only the thermal equipment but also other home appliances. For this reason, when the storage battery is performing a self-sustained operation, it is preferable to suppress the power consumption in the thermal device as much as possible so that the discharge from the storage battery is not interrupted. In the thermal device of Patent Document 1, when the power supply from the commercial power system is stopped, the user operates a specific operation switch on the remote controller, so that a part of the configuration of the thermal device is achieved by supplying power from the storage battery. The element works. For this reason, the thermal equipment cannot be used until the user manually operates a specific operation switch after the power supply from the commercial power system is not performed. In a thermal device that operates with power supplied from a commercial power system or storage battery, it is possible to automatically switch to an operation mode suitable for power supply from the storage battery when power is not supplied from the commercial power system. Technology is expected.

  The present specification provides a technique for solving the above problems. In this specification, in a thermal device that operates with power supplied from a commercial power system or a storage battery, when the power supply from the commercial power system is stopped, the operation mode suitable for power supply from the storage battery is automatically set. Provide a switchable technology.

  This specification discloses the thermal equipment which operate | moves by supplying electric power from a commercial power grid or a storage battery. The heat equipment is a heat pump heat source machine that consumes electric power to heat the heat medium, a combustion heat source machine that consumes fuel to heat the heat medium, a control device that controls the operation of the heat pump heat source machine and the combustion heat source machine, A commercial power detection device that detects the presence or absence of power supply from the commercial power system is provided. The control device can switch the operation mode between the normal mode and the storage battery compatible mode in which power consumption is suppressed as compared with the normal mode. In the normal mode, the control device switches to the storage battery compatible mode when the commercial power detection device detects that power is not supplied from the commercial power system.

  In the above thermal equipment, when the power supply from the commercial power system is stopped and the storage battery starts a self-sustaining operation, the commercial power detection device detects that the power supply from the commercial power system is stopped, The control device switches the operation mode from the normal mode to the storage battery compatible mode. With such a configuration, when power supply from the commercial power system is stopped, it is possible to automatically switch to an operation mode suitable for power supply from the storage battery.

  The thermal apparatus is configured to switch the operation mode to the normal mode when the control device detects that power is supplied from the commercial power system by the commercial power detection device in the storage battery compatible mode. Can do.

  In the above thermal equipment, when power supply from the commercial power system is restored, the commercial power detection device detects that power is being supplied from the commercial power system, and the control device changes the operation mode to the storage battery compatible mode. To normal mode. With such a configuration, when power supply from the commercial power system is restored, it is possible to automatically switch to an operation mode suitable for power supply from the commercial power system.

  The above-described thermal device can be configured such that the commercial power detection device is connected to a power line that is supplied with power from the commercial power system and is not supplied with power from the storage battery during the independent operation.

  According to the above-described thermal device, the commercial power detection device can detect the presence or absence of power supply from the commercial power system even when power is supplied to the thermal device by the independent operation of the storage battery.

  The above-described thermal device further includes a fuel detection device that detects whether fuel is supplied to the combustion heat source unit, and that the control device is supplying fuel by the fuel detection device in the storage battery compatible mode. When it detects, it can comprise so that heating of the heat medium by a heat pump heat source machine may be prohibited.

  According to the above thermal apparatus, when heating by the combustion heat source machine can be executed in the storage battery compatible mode, heating by the heat pump heat source machine is prohibited and only heating by the combustion heat source machine is executed. By setting it as such a structure, in a storage battery corresponding | compatible mode, it can prevent consuming electric power with a heat pump heat source machine. It is possible to reliably prevent the discharge from the storage battery from being interrupted.

The mechanical structure of the thermal equipment 2 which concerns on an Example is shown typically. The electric power system of the thermal equipment 2 which concerns on an Example is shown typically. It is a flowchart explaining the process relevant to the storage battery corresponding | compatible mode which the controller 110 of the thermal equipment 2 which concerns on an Example performs.

(Example)
As shown in FIG. 1, the thermal device 2 according to this embodiment includes a tank unit 4, a heat pump (HP) unit 6, a combustion unit 8, and a power failure detection unit 212.

The HP unit 6 includes a refrigerant circulation path 52 for circulating a refrigerant (for example, an HFC refrigerant such as R410A and a CO ₂ refrigerant such as R744), an air heat exchanger 54, a fan 56, a compressor 62, and three-fluid heat. The exchanger 58, the expansion valve 60, and the circulation pump 22 are provided.

  The air heat exchanger 54 exchanges heat between the outside air blown by the fan 56 and the refrigerant in the refrigerant circulation path 52. The compressor 62 pressurizes and sends out the gas-phase refrigerant. The three-fluid heat exchanger 58 exchanges heat between the refrigerant in the refrigerant circuit 52 and hot water supply water in the tank water circuit 20 described later. And / or the three-fluid heat exchanger 58 exchanges heat between the refrigerant in the refrigerant circuit 52 and heating water in the HP circuit 88 described later. The expansion valve 60 adiabatically expands and decompresses the liquid phase refrigerant. The heat pump 50 is configured by the air heat exchanger 54, the compressor 62, the three-fluid heat exchanger 58, and the expansion valve 60.

  In the heat pump 50, the high-temperature and high-pressure gas-phase refrigerant sent out from the compressor 62 flows into the three-fluid heat exchanger 58. When the refrigerant passes through the three-fluid heat exchanger 58, the refrigerant dissipates heat and condenses into a liquid phase state. The liquid-phase refrigerant that has passed through the three-fluid heat exchanger 58 is decompressed by the expansion valve 60. The low-temperature and low-pressure liquid phase refrigerant that has passed through the expansion valve 60 flows into the air heat exchanger 54. When the refrigerant passes through the air heat exchanger 54, it absorbs heat and evaporates to be in a gas phase state. The gas phase refrigerant that has passed through the air heat exchanger 54 is returned to the compressor 62. That is, the HP unit 6 operates as a heat pump heat source device that absorbs heat from the outside air with the air heat exchanger 54 and heats hot water and / or heating water with the three-fluid heat exchanger 58.

  In the HP unit 6, an anti-freezing heater (not shown) that is heated by energization is provided in each of a path through which hot water supply flows and a path through which heating water flows.

  The HP unit 6 includes an HP controller 102. The HP controller 102 includes a CPU, a ROM, a RAM, and the like. Various operation programs are stored in the ROM. The RAM temporarily stores various signals input to the HP controller 102 and various data generated in the course of execution of processing by the CPU. The HP controller 102 controls the operation of each component of the HP unit 6 by the CPU executing processing based on information stored in the ROM or RAM.

  The tank unit 4 includes a tank 10. The tank 10 stores hot water supply water heated by the HP unit 6. In the present embodiment, the hot water supply water stored in the tank 10 is tap water. The tank 10 is a hermetically sealed type, and the outside is covered with a heat insulating material. Water for hot water supply is stored in the tank 10 until it is full. The thermistors 12, 14, 16 and 18 are attached to the tank 10 at substantially equal intervals in the height direction of the tank 10. Each thermistor 12, 14, 16, 18 measures the temperature of the hot water at the mounting position. The heat storage state of the tank 10 can be specified from the detected temperatures of the thermistors 12, 14, 16, and 18.

  The tank water circulation path 20 has an upstream end connected to the lower part of the tank 10, passes through the three-fluid heat exchanger 58 of the HP unit 6, and a downstream end connected to the upper part of the tank 10. A circulation pump 22 is interposed in the tank water circulation path 20. The circulation pump 22 sends hot water supply water in the tank water circulation path 20 from the upstream side to the downstream side. When the HP unit 6 operates the heat pump 50 to drive the circulation pump 22, the hot water supply water at the lower part of the tank 10 is sent to the three-fluid heat exchanger 58 and heated, and the heated hot water supply water is supplied to the upper part of the tank 10. Returned to Inside the tank 10, a temperature stratification is formed in which a layer of hot water supply water is stacked on a layer of low temperature hot water supply water.

  The upstream end of the tap water introduction path 24 is connected to a tap water supply source 32 outside the thermal equipment 2. The downstream side of the tap water introduction path 24 is branched into a first introduction path 24a and a second introduction path 24b. The downstream end of the first introduction path 24 a is connected to the lower part of the tank 10. The downstream end of the second introduction path 24 b is connected in the middle of the first hot water supply path 36. A check valve 26 is interposed in the first introduction path 24a. A check valve 28 is interposed in the second introduction path 24b.

  An upstream end of the first hot water supply path 36 is connected to the upper part of the tank 10. As described above, the second introduction path 24 b of the tap water introduction path 24 is connected to the middle of the first hot water supply path 36. A mixing valve 30 is interposed at the connection between the first hot water supply path 36 and the second introduction path 24b. The mixing valve 30 adjusts the ratio of the flow rate of hot water for hot water flowing into the first hot water supply path 36 from the upper part of the tank 10 and the flow rate of cold tap water flowing into the first hot water supply path 36 from the second introduction path 24b. To do. The first hot water supply path 36 on the downstream side of the connection portion with the second introduction path 24 b passes through the hot water supply heating path 37 of the combustion unit 8 and is connected to the second hot water supply path 39. The first hot water supply path 36 and the second hot water supply path 39 are connected by a heat source unit bypass path 33. A bypass valve 34 is interposed in the heat source bypass path 33. A downstream end of the second hot water supply passage 39 is connected to a hot water tap 38.

  In the tank unit 4, an anti-freezing heater (not shown) that is heated by energization is provided in each of a path through which hot water supply flows and a path through which heating water flows.

  The tank unit 4 includes a tank controller 104. The tank controller 104 includes a CPU, a ROM, a RAM, and the like. Various operation programs are stored in the ROM. The RAM temporarily stores various signals input to the tank controller 104 and various data generated in the course of execution of processing by the CPU. The tank controller 104 controls the operation of each component of the tank unit 4 by the CPU executing processing based on information stored in the ROM or RAM.

  The combustion unit 8 includes a cistern 70, a heating water burner 82, and a hot water supply water burner 81. The cistern 70 is a container having an open top and stores heating water therein. The heating water in this embodiment is, for example, an antifreeze liquid. The upstream end of the heating water forward path 72 is connected to the cistern 70. A circulation pump 74 is interposed in the heating water passage 72. When the circulation pump 74 is driven, the heating water in the cistern 70 flows into the heating water forward path 72.

  The downstream end of the heating water outlet path 72 is branched into a burner heating path 73, a low-temperature heating circulation path 75, and a heating bypass path 85. A low temperature heating terminal 78 is attached to the low temperature heating circuit 75. The low temperature heating terminal 78 of the present embodiment is, for example, a floor heating panel. The low temperature heating terminal 78 is heated by heat radiation from the water for heating. A first on-off valve 86 is interposed in the low temperature heating circuit 75. A second on-off valve 87 is interposed in the heating bypass path 85.

  A heating water burner 82 is interposed in the burner heating path 73. The heating water burner 82 is a combustion heat source machine that heats the heating water in the burner heating path 73 by combustion of fuel (for example, fuel gas such as city gas) supplied from the fuel supply pipe 89. Although not shown, the heating water burner 82 includes detection means for detecting the presence or absence of ignition failure. The downstream end of the burner heating path 73 branches into a high-temperature heating circulation path 77 and a reheating circulation path 79. A high temperature heating terminal 76 is attached to the high temperature heating circuit 77. The high temperature heating terminal 76 of the present embodiment is, for example, a bathroom heating dryer. The high temperature heating terminal 76 heats using the heat of the supplied heating water. Note that an opening / closing valve is built in the high temperature heating terminal 76, and the opening / closing valve is opened when heating is performed at the high temperature heating terminal 76, and is opened / closed when heating is not performed at the high temperature heating terminal 76. The valve is closed. The low temperature heating circuit 75, the high temperature heating circuit 77, and the heating bypass circuit 85 merge at their downstream ends and are connected to the upstream end of the first heating water return path 84.

  The downstream end of the first heating water return path 84 branches into an HP circulation path 88 and an HP bypass path 94. A regulating valve 90 is provided at the downstream end of the first heating water return path 84. The adjustment valve 90 changes the opening degree, thereby allowing the flow rate of the heating water flowing from the first heating water return path 84 to the HP circulation path 88 and the flow rate of the heating water flowing from the first heating water return path 84 to the HP bypass path 94. The ratio of can be changed. The HP circulation path 88 passes through the three-fluid heat exchanger 58 of the HP unit 6 and is connected to the upstream end of the second heating water return path 96. The HP bypass path 94 is connected to the upstream end of the second heating water return path 96 without passing through the three-fluid heat exchanger 58 of the HP unit 6. The downstream end of the second heating water return path 96 is connected to the cistern 70.

  A reheating heat valve 83 and a reheating heat exchanger 97 are interposed in the reheating circulation path 79. The reheating thermal valve 83 opens and closes the reheating circulation path 79. In the reheating heat exchanger 97, heat exchange is performed between the heating water flowing in the reheating circulation path 79 and the bathtub water flowing in the bathtub water circulation path 91. The downstream end of the recirculation circulation path 79 is connected to the second heating water return path 96.

  The upstream end and the downstream end of the bathtub water circulation path 91 are connected to the side portion of the bathtub 98. A bathtub water circulation pump 99 is interposed in the bathtub water circulation path 91. When the bathtub water circulation pump 99 is driven, the bathtub water sucked out from the bathtub 98 passes through the reheating heat exchanger 97 and is returned to the bathtub 98.

  A hot water supply water burner 81 is interposed in the hot water supply heating path 37. The hot water supply water burner 81 is a combustion heat source machine that heats hot water supply water in the hot water supply heating passage 37 by combustion of fuel (for example, fuel gas such as city gas) supplied from the fuel supply pipe 89. Although not shown, the hot-water supply water burner 81 is provided with detection means for detecting the presence or absence of ignition failure. From the downstream side of the hot water supply water burner 81 of the hot water supply heating path 37, the bathtub pouring path 40 is branched. The bathtub pouring passage 40 is provided with a pouring solenoid valve 42 for opening and closing the bathtub pouring passage 40. The downstream end of the bathtub pouring channel 40 is connected to the bathtub water circulation pump 99.

  In the combustion unit 8, an anti-freezing heater (not shown) that is heated by energization is provided in each of a path through which hot water supply water flows and a path through which heating water flows.

  The combustion unit 8 is provided with a flow meter (for example, a gas pulse meter) 92 that detects the flow rate of the fuel supplied to the hot water burner 81 and / or the heating water burner 82 via the fuel supply pipe 89.

  The combustion unit 8 includes a combustion controller 106. The combustion controller 106 includes a CPU, a ROM, a RAM, and the like. Various operation programs are stored in the ROM. The RAM temporarily stores various signals input to the combustion controller 106 and various data generated in the course of execution of processing by the CPU. The combustion controller 106 controls the operation of each component of the combustion unit 8 when the CPU executes processing based on information stored in the ROM or RAM. A remote controller 108 is connected to the combustion controller 106. The remote control 108 is provided with various switches for the user to operate the thermal device 2 and a liquid crystal display for displaying the operating state of the thermal device 2 to the user.

  The HP controller 102 and the tank controller 104 can communicate bidirectionally. Further, the tank controller 104 and the combustion controller 106 can communicate in both directions. The HP controller 102, the tank controller 104 and the combustion controller 106 cooperate to control the operation of the thermal device 2. Hereinafter, the HP controller 102, the tank controller 104, and the combustion controller 106 are collectively referred to simply as a controller 110.

  Next, the operation of the thermal device 2 of the present embodiment will be described. Below, the heating operation, the antifreezing operation, the hot water supply operation, the hot water operation, the heating operation, and the reheating operation performed by the thermal device 2 will be described in order.

(Boiling operation)
The boiling operation is an operation in which the hot water supply water in the tank 10 is heated by the HP unit 6 and the hot water supply water that has reached a high temperature is returned to the tank 10. When performing the boiling operation, the controller 110 drives the compressor 62 and the fan 56. The controller 110 drives the circulation pump 22.

  By driving the compressor 62, the refrigerant in the refrigerant circulation path 52 circulates in the order of the compressor 62, the three-fluid heat exchanger 58, the expansion valve 60, and the air heat exchanger 54. In this case, the refrigerant in the refrigerant circuit 52 passing through the three-fluid heat exchanger 58 is in a high-temperature and high-pressure gas state. Further, the hot water in the tank 10 circulates in the tank water circulation path 20 by driving the circulation pump 22. That is, hot water supply water existing in the lower part of the tank 10 is introduced into the tank water circulation path 20 and heated by the heat of the refrigerant in the refrigerant circulation path 52 when the introduced hot water supply water passes through the three-fluid heat exchanger 58. Then, the heated hot water supply water is returned to the upper part of the tank 10. At this time, the controller 110 controls the operations of the compressor 62, the fan 56, and the circulation pump 22 so that the temperature of the hot water after passing through the three-fluid heat exchanger 58 becomes the set boiling temperature. . Thereby, hot water for hot water supply is stored in the tank 10. When the inside of the tank 10 is in a fully stored state filled with high-temperature hot water supply water, the controller 110 ends the boiling operation.

  The controller 110 sets the boiling temperature in the boiling operation. Usually, the boiling temperature in the boiling operation is set to a temperature (for example, 60 ° C.) obtained by adding a predetermined temperature width to the hot water supply set temperature. Further, when it is necessary to sterilize the hot water in the tank 10 by heating it to a high temperature, the boiling temperature in the boiling operation is set to a temperature (for example, 90 ° C.) higher than the normal boiling temperature. The In this way, the boiling operation performed at the boiling temperature set higher than the normal boiling temperature is particularly called a refresh operation.

(Anti-freezing operation)
The freeze prevention operation is an operation for preventing freezing of a path through which hot water supply water flows and a path through which heating water flows in each of the tank unit 4, the HP unit 6 and the combustion unit 8 in a situation where the outside air temperature is low. When the controller 110 instructs the start of the freeze prevention operation, the tank unit 4, the HP unit 6 and the combustion unit 8 are heated by the freeze prevention heater. In the freeze prevention operation, the freeze prevention heater is turned on and off alternately at predetermined times to prevent freezing of hot water supply water and heating water. When the outside air temperature becomes high, the controller 110 ends the freeze prevention operation.

(Hot water operation)
The hot water supply operation is an operation in which hot water supply water adjusted to a hot water supply set temperature is supplied to the hot water tap 38. When the hot-water tap 38 is opened, tap water flows into the lower part of the tank 10 from the tap water introduction path 24 (first introduction path 24a) due to the water pressure from the tap water supply source 32. At the same time, the hot water supply water in the upper part of the tank 10 is supplied to the hot water tap 38 via the first hot water supply path 36.

  When the temperature of the hot water supplied from the tank 10 to the first hot water supply path 36 (that is, the detected temperature of the thermistor 12) is higher than the set hot water temperature, the controller 110 drives the mixing valve 30 to perform the second introduction. Tap water is introduced into the first hot water supply path 36 from the path 24b. Therefore, the hot water supply water supplied from the tank 10 and the tap water supplied from the second introduction path 24 b are mixed in the first hot water supply path 36. The controller 110 adjusts the opening degree of the mixing valve 30 so that the temperature of the hot water supplied to the hot water tap 38 matches the hot water supply set temperature. Such a hot water supply operation is also referred to as a non-combustion hot water supply operation.

  On the other hand, when the temperature of the hot water supplied from the tank 10 to the first hot water supply path 36 is lower than the set hot water temperature, the controller 110 closes the bypass valve 34 and the first hot water supply path 36 by the hot water hot water burner 81. Heat the water for hot water passing through. The controller 110 controls the output of the hot water burner 81 so that the temperature of the hot water supplied to the hot water tap 38 matches the hot water set temperature. Such a hot water supply operation is also referred to as a combustion hot water supply operation.

(Hot water operation)
The hot water operation is an operation in which hot water is applied to the bathtub 98 at the hot water set temperature. When the user instructs the start of hot water operation, the thermal device 2 starts the hot water operation. In the hot water operation, the controller 110 opens the hot water solenoid valve 42. When the hot water solenoid valve 42 is opened, tap water flows into the lower portion of the tank 10 from the tap water introduction path 24 (first introduction path 24 a) due to the water pressure from the tap water supply source 32. At the same time, the hot water supply water in the upper part of the tank 10 is supplied to the bathtub 98 via the first hot water supply path 36, the hot water supply heating path 37, the bathtub pouring path 40, and the bathtub water circulation path 91. In the hot water operation, the temperature of the hot water supplied to the bathtub pouring channel 40 is adjusted to the hot water setting temperature in the same manner as in the hot water operation. When the flow rate of the hot water supplied to the bathtub 98 reaches the hot water set water amount, the controller 110 ends the hot water operation.

(Heating operation)
The heating operation is an operation for heating by the low temperature heating terminal 78 or the high temperature heating terminal 76. When the execution of the heating operation is instructed by the user, the controller 110 drives the circulation pump 74 with the first on-off valve 86 opened and the second on-off valve 87 closed. Further, the controller 110 drives the compressor 62 and the fan 56. As a result, the refrigerant in the refrigerant circulation path 52 is pressurized by the compressor 62 to become a high-temperature and high-pressure gas state, and the heating water heated when passing through the three-fluid heat exchanger 58 passes through the cistern 70 and is subjected to low-temperature heating. It is supplied to the terminal 78 and the high temperature heating terminal 76. Furthermore, the controller 110 operates the heating water burner 82 as necessary. As a result, the high-temperature heating terminal 76 is supplied with heating water having a higher temperature due to heating by the heating water burner 82. In the heating operation, the controller 110 sets the temperature of the heating water supplied to the low temperature heating terminal 78 to the low temperature heating set temperature and the temperature of the heating water supplied to the high temperature heating terminal 76 to the high temperature heating set temperature. Thus, the opening degree of the regulating valve 90, the operation of the HP unit 6 and the output of the heating water burner 82 are controlled.

(Reaping driving)
The chasing operation is an operation for chasing the bathtub water stored in the bathtub 98. When the user instructs the start of the chasing operation, the thermal device 2 starts the chasing operation. In the reheating operation, the controller 110 drives the bathtub water circulation pump 99. Further, the controller 110 drives the circulation pump 74 with the first on-off valve 86 and the second on-off valve 87 closed and the reheating heat operated valve 83 opened. In the reheating operation, heating water is heated by the HP unit 6 and heating water is heated by the heating water burner 82 as in the heating operation. Thereby, the bathtub water is sucked out from the bathtub 98 and heated by the reheating heat exchanger 97 by heat exchange with the heating water. The heated bathtub water is returned to the bathtub 98.

(Power system to thermal equipment)
FIG. 2 shows a power system of a house where the thermal equipment 2 is installed. A distribution board 202 is connected to the commercial power system 200. The distribution board 202 is connected to a general load 204 such as an air conditioner, a washing machine, a microwave oven, etc., and a power failure detection unit 212, and to a storage battery distribution board 206. The storage battery distribution board 206 is connected with a selected load 208 such as lighting, a refrigerator, and a television, and the tank unit 4, HP unit 6, and combustion unit 8 of the thermal equipment 2, and a storage battery 210. Yes. The storage battery 210 is a secondary battery that can be charged and discharged. When power is supplied from the commercial power system 200, the power from the commercial power system 200 is obtained from the general load 204, the power failure detection unit 212, the selected load 208, the tank unit 4, the HP unit 6, the combustion unit 8, and the storage battery. 210 respectively. In addition, when power is supplied from the commercial power system 200, the power from the storage battery 210 is supplementarily supplied to the general load 204, the power failure detection unit 212, the selected load 208, the tank unit 4, the HP unit 6, and the combustion unit. 8 can also be supplied.

  For example, when power is not supplied from the commercial power system 200 due to a power failure or the like, the storage battery 210 performs a self-sustained operation. When the storage battery 210 performs a self-sustained operation, the power from the storage battery 210 is supplied to the selected load 208, the tank unit 4, the HP unit 6 and the combustion unit 8 via the storage battery distribution board 206. No power is supplied to the power board 202, and therefore no power is supplied to the general load 204 and the power failure detection unit 212. The storage battery 210 has a built-in protection circuit (not shown) that cuts off the discharge from the storage battery 210 when the power discharged from the storage battery 210 exceeds a predetermined upper limit discharge power.

  The power failure detection unit 212 determines whether or not power is being supplied from the commercial power system 200 to the distribution board 202 based on the voltage or frequency of the power line that supplies power from the commercial power system 200 from the distribution board 202. can do. The power failure detection unit 212 is connected to the remote control 108. The power failure detection unit 212 transmits a detection result about the presence or absence of power supply from the commercial power system 200 to the remote control 108.

(Operation mode switching)
The controller 110 of the thermal device 2 can operate in either the normal mode or the storage battery compatible mode. In the normal mode, the controller 110 performs the above-described various operations without limiting power consumption to the tank unit 4, the HP unit 6, and the combustion unit 8. In the storage battery compatible mode, the controller 110 limits the power consumption of the tank unit 4, the HP unit 6, and the combustion unit 8, and executes the various operations described above while suppressing the power consumption compared to the normal mode. For example, in the storage battery compatible mode, the controller 110 limits the power consumption in the heat pump 50 and executes the various operations described above.

  FIG. 3 shows processing performed by the controller 110 in connection with switching between the normal mode and the storage battery handling mode.

  In step S <b> 2, the controller 110 stands by until the power from the commercial power system 200 is not supplied based on the signal from the power failure detection unit 212. When power is not supplied from commercial power system 200 (YES in step S2), the process proceeds to step S4.

  In step S4, the controller 110 switches the operation mode from the normal mode to the storage battery compatible mode. After step S4, the process proceeds to step S6.

  In step S6, the controller 110 determines whether there is a combustion request in the hot water burner 81 or the heating water burner 82. If there is no combustion request (NO in step S6), the process proceeds to step S8.

  In step S <b> 8, the controller 110 determines whether the power supply from the commercial power system 200 has been restored based on the signal from the power failure detection unit 212. If the power supply from the commercial power system 200 has not been restored (NO in step S8), the process returns to step S6. If the power supply from commercial power system 200 has been restored (YES in step S8), the process proceeds to step S10.

  In step S10, the controller 110 switches the operation mode from the storage battery compatible mode to the normal mode. After step S10, the process returns to step S2.

  If there is a combustion request in hot water supply burner 81 or heating water burner 82 in step S6 (in the case of YES), the process proceeds to step S12. In step S <b> 12, the controller 110 executes the combustion operation of the hot water supply water burner 81 or the heating water burner 82. After step S12, the process proceeds to step S14.

  In step S14, the controller 110 determines whether or not an ignition failure has occurred in the hot water supply water burner 81 or the heating water burner 82 that has performed the combustion operation. If there is no ignition failure (NO in step S14), the process proceeds to step S16.

  In step S <b> 16, the controller 110 prohibits the operation of the heat pump 50. As a result, the thermal device 2 thereafter performs the above-described various operations using only the hot water supply water burner 81 and the heating water burner 82 as heating sources. After step S16, the process proceeds to step S8.

  If an ignition failure has occurred in step S14 (YES), the process proceeds to step S18. The ignition failure of the hot water supply burner 81 or the heating water burner 82 is a case where the ignition mechanism of the hot water supply water burner 81 or the heating water burner 82 is out of order even though fuel is normally supplied from the fuel supply pipe 89. This can occur when the fuel supply from the fuel supply pipe 89 is stopped. Therefore, in step S18, the controller 110 determines whether or not the fuel flow rate is detected by the flow meter 92. When the fuel flow rate is detected (YES in step S18), fuel is supplied from the fuel supply pipe 89, and it is considered that the ignition mechanism of the hot water burner 81 or the heating water burner 82 has failed. Therefore, the process proceeds to step S20.

  In step S20, the controller 110 notifies the user of the occurrence of an ignition failure error via the remote controller 108, and ends the process of FIG.

  When the fuel flow rate is not detected in step S18 (in the case of NO), it is considered that the fuel supply from the fuel supply pipe 89 is stopped, and thus the process proceeds to step S22. In step S <b> 22, the controller 110 prohibits the operation of the hot water supply burner 81 and the heating water burner 82. After step S22, the process proceeds to step S24.

  In step S24, the controller 110 determines whether or not the operation of the heat pump 50 in the storage battery compatible mode is permitted by the user. The user of the thermal device 2 can set in advance via the remote control 108 whether or not to permit the operation of the heat pump 50 in the storage battery compatible mode. When the operation of the heat pump 50 in the storage battery compatible mode is permitted by the user (YES in step S24), the process proceeds to step S25, and the thermal device 2 uses the heat pump 50 alone as the heating source, and performs the various types described above. Is executed, and the process proceeds to step S8. When the operation of heat pump 50 in the storage battery compatible mode is not permitted by the user (YES in step S24), the process proceeds to step S26. In step S <b> 26, the controller 110 prohibits the operation of the heat pump 50. In this case, the thermal device 2 performs the various operations described above using only the amount of heat remaining in the tank 10 and the cistern 70. After step S26, the process proceeds to step S8.

  In the above process, the processes in steps S18 and S20 may be omitted. In this case, when an ignition failure occurs in step S14 (in the case of YES), it is determined that fuel is not supplied from the fuel supply pipe 89, and the process proceeds to step S22.

  In the above process, the processes in steps S24 and S26 may be omitted. In this case, after prohibiting the combustion operation in step S22, the thermal device 2 performs various operations using only the heat pump 50 as a heating source. In this case, after step S22, the process proceeds to step S8.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2: Thermal equipment 4: Tank unit 6: HP unit 8: Combustion unit 10: Tank 12: Thermistor 14: Thermistor 16: Thermistor 18: Thermistor 20: Tank water circulation path 22: Circulation pump 24: Tap water introduction path 24a: First Introduction path 24b: Second introduction path 26: Check valve 28: Check valve 30: Mixing valve 32: Tap water supply source 33: Heat source bypass path 34: Bypass valve 36: First hot water supply path 37: Hot water supply heating path 38 : Hot water tap 39: Second hot water supply path 40: Bath pouring path 42: Pouring solenoid valve 50: Heat pump 52: Refrigerant circulation path 54: Air heat exchanger 56: Fan 58: Three-fluid heat exchanger 60: Expansion valve 62 : Compressor 70: Systurn 72: Heating water path 73: Burner heating path 74: Circulation pump 75: Low temperature heating circuit 76: High temperature heating terminal 77: High temperature heating circuit Ring 78: Low temperature heating terminal 79: Reheating circulation path 81: Hot water heater 82: Heating water burner 83: Reheating heat valve 84: First heating water return path 85: Heating bypass path 86: First on-off valve 87: Second open / close valve 88: HP circulation path 89: Fuel supply pipe 90: Adjustment valve 91: Bath water circulation path 92: Flow meter 94: HP bypass path 96: Second heating water return path 97: Reheating heat exchanger 98: Bath 99 : Bath water circulation pump 102: HP controller 104: Tank controller 106: Combustion controller 108: Remote controller 110: Controller 200: Commercial power system 202: Distribution board 204: General load 206: Distribution board 208 for storage battery: Selected load 210: Storage battery 212: Power failure detection unit

Claims (4)

A thermal device that operates with power supplied from a commercial power system or a storage battery,
A heat pump heat source machine that consumes electric power and heats the heat medium;
A combustion heat source machine that consumes fuel and heats the heat medium;
A control device for controlling the operation of the heat pump heat source machine and the combustion heat source machine;
It has a commercial power detection device that detects the presence or absence of power supply from the commercial power system,
The control device can switch the operation mode between the normal mode and the storage battery compatible mode in which the power consumption is suppressed compared to the normal mode,
In the normal mode, the control device switches the operation mode to the storage battery compatible mode when the commercial power detection device detects that power is not supplied from the commercial power system.   The thermal device according to claim 1, wherein the control device switches the operation mode to the normal mode when the commercial power detection device detects that power is supplied from the commercial power system in the storage battery compatible mode.   The thermal power device according to claim 1 or 2, wherein the commercial power detection device is connected to a power line to which power is supplied from a commercial power system and power is not supplied from a storage battery during self-sustaining operation. It further includes a fuel detection device that detects whether fuel is supplied to the combustion heat source unit,
4. The control device according to claim 1, wherein the control device prohibits heating of the heat medium by the heat pump heat source device when detecting that fuel is being supplied by the fuel detection device in the storage battery compatible mode. 5. Thermal equipment.

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