JP6836883B2 - Heating system - Google Patents

Description

The present invention relates to a heating system.

Patent Document 1 discloses a heating system that supplies a heat medium to a heating terminal that heats by radiating heat from the heat medium. The heating terminal is provided with a thermal valve corresponding to the heating terminal. The heating system of Patent Document 1 includes a combustion heat source, a circulation pump, a temperature sensor for detecting the temperature of a heat medium returning to the combustion heat source from the end of the heating end, and a control device. The control device controls the open / closed state of the thermal valve to perform a heating operation for heating the living room.

Japanese Unexamined Patent Publication No. 10-19282

In a heating system, there is a heating system including a heat pump heat source that consumes electric power to heat a heat medium. The energy efficiency of heating the heat medium with the heat pump heat source is higher than the energy efficiency of heating the heat medium with the combustion heat source. Therefore, the energy efficiency of the entire heating system can be improved by lengthening the heating time of the heat medium by the heat pump heat source. However, the heating capacity of the heat pump heat source is lower than the heating capacity of the combustion heat source. Therefore, when the heating load is high, such as when the temperature in the living room is low, it is preferable to drive the combustion heat source. Therefore, when the temperature in the living room is relatively low and the heating load is high, the combustion heat source is driven, and when the temperature in the living room is relatively high and the heating load is low, the heat pump heat source is driven. It is preferable to switch the heat source for heating the heat medium according to the load. Therefore, a heating system capable of calculating the heating load is desired.

The present specification provides a technique capable of calculating a heating load at a plurality of heating stages in a heating system that supplies a heat medium to a plurality of heating terminals that are heated by heat radiation from the heat medium.

The heating system disclosed in the present specification is a heating system that supplies a heat medium to a plurality of heating terminals that are heated by heat radiation from the heat medium, and each of the plurality of heating terminals has a plurality of thermal valves. Each of the thermal valves is provided in an open state in which the heat medium is supplied to the corresponding heating terminal and in a closed state in which the heat medium is not supplied to the corresponding heating terminal. It is possible to switch between. The heating system includes a combustion heat source that heats the heat medium, a heat pump heat source that heats the heat medium, a circulation pump that circulates the heat medium, and a temperature sensor that measures the temperature of the heat medium flowing through the heating path. A control device capable of switching the state of the plurality of thermal valves is provided. The control device has a storage unit that stores the number of the plurality of thermal valves installed, and the control device drives the combustion heat source without driving the heat pump heat source. A first heating operation for heating the heat medium, a second heating operation for heating the heat medium by driving the combustion heat source and the heat pump heat source, and the heat pump heat source without driving the combustion heat source. It is possible to execute a heating operation including a third heating operation for heating the heat medium by driving the heat medium, and the control device is in the open state during the heating operation. Based on the number of valves and the temperature measured by the temperature sensor, the heating load at the plurality of heating terminals is calculated, and the storage unit stores the start time of the heating operation in the past predetermined period and the start time of the heating operation. The end time of the heating operation and the heating load during the heating operation are stored, and the control device is reserved so that the heating operation is started at the first scheduled start time. In this case, based on the heating load stored in the storage unit, the first scheduled start time is advanced to a second scheduled start time earlier than the first scheduled start time .

According to the above configuration, the control device can, based on the temperature measured by Netsudoben number and the temperature sensor is open, to calculate the heating load of a plurality of heating terminal. Therefore, the control device can appropriately determine which of the first heating operation, the second heating operation, and the third heating operation is to be executed according to the calculated heating load. For example, when the heating load is relatively large, the first or second heating operation is executed, and when the heating load is relatively small, the third heating operation is executed.
In general, the heating load is highest immediately after the start of heating operation, and then gradually decreases. Further, the heating capacity of the heat pump heat source is lower than the heating capacity of the combustion heat source. Therefore, in a situation where the heating load is high immediately after the start of the heating operation, there is a high possibility that the combustion heat source must be driven instead of the heat pump heat source. According to the above configuration, the heating operation is executed at the first scheduled start time by advancing the first scheduled start time to the second scheduled start time based on the heating load stored in the storage unit. A part of the heating load immediately after the start of the heating operation in the case can be distributed to the heating operation executed from the second scheduled start time to the first scheduled start time. Therefore, the heating load immediately after the start of the heating operation can be reduced. As a result, it is possible to increase the possibility that the heat pump heat source can be driven to heat the heat medium immediately after the start of the heating operation. As a result, the energy efficiency of the heating system can be increased.

It is a figure which shows typically the structure of the hot water supply heating system 2. It is a figure which shows an example of the heating operation history and the outside air temperature history stored in a non-volatile memory. It is a figure which showed the heating level table. It is a flowchart explaining a heating process. It is a flowchart explaining the load leveling process. It is a figure for demonstrating the calculation of a load difference. It is a flowchart explaining the 1st heating process. It is a flowchart explaining the 2nd heating process. It is a flowchart explaining the 3rd heating process. It is a flowchart explaining operation history storage process. The figure which shows the heating operation after executing the load leveling process. The figure which shows the heating load after executing the load leveling process.

The main features of the examples described below are listed. It should be noted that the technical elements described below are independent technical elements and exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Feature 1 ) When the heating operation is reserved to start at the first scheduled start time, the control device has a first drive time elapsed from the first scheduled start time stored in the storage unit. Based on the difference between the first heating load and the second heating load stored in the storage unit between the time when the first drive time elapses and the time when the second drive time elapses. , The first scheduled start time may be advanced to the second scheduled start time, which is earlier than the first scheduled start time.

For example, when the difference between the first heating load and the second heating load is small, even if the first scheduled start time is advanced to the second scheduled start time, the effect of distributing the heating load may be small. According to the above configuration, the control device advances the first scheduled start time to the second scheduled start time only when, for example, the difference between the first heating load and the second heating load is relatively large. Can be done. As a result, the first scheduled start time can be advanced to the second scheduled start time only when the effect of distributing the heating load is large.

(Feature 2 ) The heating system may further include an outside air temperature sensor for measuring the outside air temperature, and the storage unit may store the outside air temperature in the past predetermined period. In this case, the control device sets the second scheduled start time as the second scheduled start time when the outside air temperature at the current time is lower than the predetermined temperature at the same time as the current time stored in the storage unit. It is better to advance to the third scheduled start time earlier than.

Normally, when the outside air temperature is low, the heating load is higher than when the outside air temperature is high. Therefore, when the outside air temperature at the current time is lower than the outside air temperature at the same time as the current time stored in the storage unit, the heating load of the heating operation executed at the first scheduled start time is stored in the storage unit. It is likely to be higher than the heating load. According to the above configuration, by advancing the scheduled start time of the heating operation to the third scheduled start time, the heating load that increases due to the low outside air temperature is also executed before the first scheduled start time. Can be distributed to heating operations.

Another heating system disclosed in the present specification is a heating system that supplies a heat medium to a plurality of heating terminals that are heated by heat dissipation from the heat medium, and each of the plurality of heating terminals has a plurality of thermal motions. Each of the valves is provided correspondingly, and each of the thermal valves is in an open state in which the heat medium is supplied to the corresponding heating terminal and in a closed state in which the heat medium is not supplied to the corresponding heating terminal. The heating system is switchable between states, the heating system includes a combustion heat source that heats the heat medium, a heat pump heat source that heats the heat medium, a circulation pump that circulates the heat medium, and the heating path. a temperature sensor for measuring the temperature of the heating medium, and including the temperature sensor return temperature sensor for measuring the return temperature of the heating medium returning from a plurality of heating terminal in the heating path, the state of the plurality of thermally activated valves It is equipped with a switchable control device. The control device has a storage unit that stores the number of the plurality of thermal valves installed, and the control device drives the combustion heat source without driving the heat pump heat source. A first heating operation for heating the heat medium, a second heating operation for heating the heat medium by driving the combustion heat source and the heat pump heat source, and the heat pump heat source without driving the combustion heat source. It is possible to execute a heating operation including a third heating operation for heating the heat medium by driving the heat medium, and the control device is in the open state during the heating operation. The heating load at the plurality of heating terminals is calculated based on the number of operating valves and the temperature measured by the temperature sensor. The control device may be able to switch the heating capacity by the heat pump heat source in a plurality of stages during the execution of the third heating operation. In this case, the control device identifies the return temperature difference between the current return temperature and the return temperature before the predetermined time at predetermined time intervals during the execution of the third heating operation, and the heat pump is based on the return temperature difference. If you switch the heating capacity of the heat source.

According to the above configuration, the control device can calculate the heating load at the plurality of heating terminals based on the number of thermal valves in the open state and the temperature measured by the temperature sensor. Therefore, the control device can appropriately determine which of the first heating operation, the second heating operation, and the third heating operation is to be executed according to the calculated heating load. For example, when the heating load is relatively large, the first or second heating operation is executed, and when the heating load is relatively small, the third heating operation is executed.
Further, if the change in the return temperature at predetermined time intervals is large, it is highly possible that the heating capacity of the heat pump heat source is not appropriate. According to the above configuration, the control device can control the heating capacity of the heat pump heat source to an appropriate heating capacity based on the return temperature difference.

(Example)
As shown in FIG. 1, the hot water supply / heating system 2 according to the present embodiment includes a hot water supply system 104, a heat pump system 106, a heating system 108, and a control device 110.

The heat pump system 106 includes a heat pump 50 and a three-fluid heat exchanger 58. The heat pump 50 includes a refrigerant circulation path 52 for circulating a refrigerant (for example, Freon gas R410A, etc.), a heat exchanger (evaporator) 54, a fan 56, a compressor 62, and an expansion valve 60. There is. The refrigerant circulation path 52 passes through the three-fluid heat exchanger 58. Further, the heat exchanger 54, the compressor 62, and the expansion valve 60 are installed in the refrigerant circulation path 52. The operation of the heat pump 50 having the above configuration will be described. When the compressor 62 operates, the refrigerant in the refrigerant circulation path 52 is pressurized by the compressor 62 to enter a high-temperature and high-pressure gas phase state. The refrigerant pressurized by the compressor 62 into a high-temperature and high-pressure gas phase state is sent to the three-fluid heat exchanger 58, and is in the water in the heat recovery path 88 described later and in the tank water circulation path 20 described later. It is cooled by heat exchange with water and condensed to a liquid phase state. The refrigerant cooled by the three-fluid heat exchanger 58 and entering the liquid phase state is sent to the expansion valve 60 and decompressed by the expansion valve 60 to enter a low temperature and low pressure liquid phase state. The low-temperature and low-pressure liquid-phase state refrigerant is heated and evaporated by heat exchange with the outside air blown by the fan 56 in the heat exchanger 54 to enter the gas-phase state. The refrigerant in the gas phase state is returned to the compressor 62 and pressurized again. Therefore, by operating the heat pump 50, high-temperature and high-pressure refrigerant can be sent into the refrigerant circulation path 52 passing through the three-fluid heat exchanger 58. In the following, the heat pump 50 and the three-fluid heat exchanger 58 may be collectively referred to as a “heat pump heat source”.

The hot water supply system 104 includes a tank 10, a tank water circulation path 20, a tap water introduction path 24, a supply path 36, and a first burner heating device 81.

The tank 10 stores hot water heated by a heat pump heat source. The tank 10 is a closed type, and the outside is covered with a heat insulating material. Water is stored in the tank 10 until it is full. 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 and 18 measures the temperature of the water at its mounting position.

The upstream end of the tank water circulation path 20 is connected to the lower part of the tank 10, and the downstream end is connected to the upper part of the tank 10. A first circulation pump 22 is interposed in the tank water circulation passage 20. The first circulation pump 22 sends out the water in the tank water circulation path 20 from the upstream side to the downstream side. Further, as described above, the tank water circulation path 20 passes through the three-fluid heat exchanger 58. Therefore, when the heat pump heat source is operated, the water in the tank water circulation path 20 is heated by the three-fluid heat exchanger 58. Therefore, when the first circulation pump 22 and the heat pump heat source are operated, the water in the lower part of the tank 10 is sent to the three-fluid heat exchanger 58 to be heated, and the heated water is returned to the upper part of the tank 10. The tank water circulation channel 20 is a water channel for storing heat in the tank 10.

The upstream end of the tap water introduction path 24 is connected to the tap water supply source 32. 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 24a is connected to the lower part of the tank 10. The downstream end of the second introduction path 24b is connected in the middle of the supply path 36. At the connection between the second introduction path 24b and the supply path 36, the flow rate of water flowing through the first introduction path 24a (that is, the flow rate of water flowing from the tank 10 to the supply path 36) and the flow rate of water flowing through the second introduction path 24b. A mixing valve 36a for adjusting the ratio of the above is arranged. A check valve 26 is interposed in the first introduction path 24a. A check valve 28 and a water amount sensor 30 are interposed in the second introduction path 24b. The water amount sensor 30 detects the flow rate of tap water flowing in the second introduction path 24b.

The upstream end of the supply path 36 is connected to the upper part of the tank 10. As described above, the second introduction path 24b of the tap water introduction path 24 is connected in the middle of the supply path 36. A water amount sensor 34 is interposed in the supply path 36 on the upstream side of the connection portion with the second introduction path 24b. The water amount sensor 34 detects the flow rate of water flowing from the tank 10 into the supply path 36. A first burner heating device 81 is interposed in the supply path 36 on the downstream side of the connection portion with the second introduction path 24b. The first burner heating device 81 heats the water in the supply path 36. The downstream end of the supply path 36 is connected to the hot water tap 38. The supply path 36 is provided with a bypass path 36b which is a flow path for bypassing the first burner heating device 81. Further, the bypass path 36b is provided with a bypass control valve 36c for adjusting the opening degree of the bypass path 36b.

The heating system 108 includes a systurn 70, a water circulation path 71 for heating, a second burner heating device 82, six heating terminals H1, H2, H3, H4, H5, H6, and six thermal valves V1. It includes V2, V3, V4, V5, and V6. In the following, the heating terminals H1 to H6 may be simply referred to as a heating terminal H without distinction, and the thermal valves V1 to V6 may be simply referred to as a thermal valve V without distinction. The heating water circulation path 71 includes a heating outward path 72, a heating return path 84, a regulating valve 90, a heat recovery path 88, a bypass path 94, and a circulation channel 96. The heating water circulation channel 71 is a water channel for circulating water in the systurn 70. The water in the heating water circulation path 71 is heated by the second burner heating device 82 and the three-fluid heat exchanger 58.

The cistern 70 is a container whose upper part is open, and stores water as a heat medium inside. The downstream end of the circulation flow path 96 and the upstream end of the heating outbound route 72 are connected to the systurn 70. Water flows into the systurn 70 from the circulation flow path 96. The water in the systurn 70 is introduced into the heating outbound route 72.

The upstream end of the heating outbound route 72 is connected to the systurn 70, and the downstream end is branched into six and connected to the outbound ports of the heating terminals H1 to H6 via the thermal valves V1 to V6. A second circulation pump 74 and a thermistor 76 for detecting the burner return temperature DB1 are interposed in the heating outbound route 72. The second circulation pump 74 is a pump that sends out the water in the heating outbound route 72 to the downstream side. The flow rate of water circulating in the heating water circulation path 71 changes according to the number of heating terminals H in operation. That is, even if the rotation speed of the second circulation pump 74 per unit time is constant, if the number of heating terminals H in operation increases, the resistance of the heating outbound path 72 decreases, and the inside of the heating water circulation path 71 The flow rate of circulating water increases. As the number of heating terminals H in operation increases, the flow rate of water circulating in the heating water circulation path 71 increases. A second burner heating device 82 is interposed in the heating outbound path 72 on the upstream side of the heating terminals H1 to H6 and the thermal valves V1 to V6. The second burner heating device 82 heats the water in the heating outbound route 72. The second burner heating device 82 has a higher ability to heat the water circulating in the heating water circulation path 71 than the heat pump 50. In other words, the second burner heating device 82 has a larger amount of heating per unit time than the heat pump 50. The water heated by the second burner heating device 82 is supplied to the heating terminal H. Further, a thermistor 78 for measuring the burner forward temperature DB2 is interposed on the downstream side of the second burner heating device 82 of the heating outbound path 72.

The heating terminals H1 to H6 are terminals that heat the living room by dissipating the heat of the water supplied from the heating outbound route 72, respectively. Further, the thermal valves V1 to V6 are provided at branch positions of the heating outbound path 72 corresponding to the heating terminals H1 to H6, respectively. The heating terminals H1 to H6 and the thermal valves V1 to V6 are all arranged in parallel with each other. Each thermal valve V1 to V6 switches between an open state in which water is supplied to the corresponding heating terminals H1 to H6 and a closed state in which water is not supplied to the corresponding heating terminals H1 to H6. For example, while the thermal valve V1 is open, water is supplied to the heating terminal H1 from the heating outbound path 72. On the other hand, while the thermal valve V1 is closed, water is not supplied to the heating terminal H1 from the heating outbound path 72. Further, while all the thermal valves V1 to V6 are closed, the water in the heating water circulation path 71 does not circulate. When the water supplied from the heating outbound route 72 is used for heating in the heating terminal H, the water is deprived of heat and becomes relatively low temperature water. The relatively low temperature water after being used for heating is introduced into the heating return path 84.

The upstream end of the heating return path 84 is branched into six and connected to the return ports of the heating terminals H1 to H6, and the downstream end is connected to the upstream end of the bypass path 94 and the upstream end of the heat recovery path 88. A thermistor 86 for measuring the HP (heat pump) return temperature DH1 is interposed in the heating return path 84. The thermistor 86 measures the temperature of the water in the heating return path 84 (that is, the temperature of the water sent to the three-fluid heat exchanger 58).

The upstream end of the heat recovery path 88 is connected to the upstream end of the bypass path 94 and the downstream end of the heating return path 84, and the downstream end is connected to the downstream end of the bypass path 94 and the upstream end of the circulation flow path 96. The heat recovery path 88 passes through the three-fluid heat exchanger 58. Therefore, when the heat pump heat source is operated, the water in the heat recovery path 88 is heated by the three-fluid heat exchanger 58. A thermistor 92 for measuring the HP going temperature DH2 is interposed on the downstream side of the three-fluid heat exchanger 58 of the heat recovery path 88. The thermistor 92 measures the temperature of the water in the heat recovery path 88 after passing through the three-fluid heat exchanger 58.

The upstream end of the bypass path 94 is connected to the downstream end of the heating return path 84 and the upstream end of the heat recovery path 88, and the downstream end is connected to the downstream end of the heat recovery path 88 and the upstream end of the circulation flow path 96. That is, the bypass path 94 bypasses the upstream side and the downstream side of the three-fluid heat exchanger 58.

The regulating valve 90 is attached to a connecting portion between the downstream end of the heating return path 84, the upstream end of the heat recovery path 88, and the upstream end of the bypass path 94. By changing the opening degree of the regulating valve 90, the flow rate of water passing through the heat recovery path 88 (the flow rate of water passing through the three-fluid heat exchanger 58) and the flow rate of water passing through the bypass path 94 can be obtained. The ratio of can be changed. For the adjusting valve 90 of this embodiment, for example, a three-way valve is used. The opening degree of the regulating valve 90 can be changed according to the number of operating heating terminals H. In this embodiment, the opening degree of the regulating valve 90 is changed so that the larger the number of operating heating terminals H, the higher the ratio of the flow rate of water passing through the bypass path 94.

The upstream end of the circulation flow path 96 is connected to the downstream end of the heat recovery path 88 and the downstream end of the bypass path 94, and the downstream end is connected to the systurn 70. A thermistor 98 is interposed in the circulation flow path 96. The thermistor 98 measures the temperature of water in the circulation channel 96. The heating system 108 is also provided with a thermistor 100 that detects the outside air temperature DO.

The control device 110 is electrically connected to the hot water supply system 104, the heat pump system 106, and the heating system 108, and controls the operation of each component. The control device 110 includes a non-volatile memory 112. The non-volatile memory 112 stores a heating operation history for the past 7 days of a specific household, an outside air temperature history for the past 7 days, and heating level tables 130 and 132 (see FIG. 3). FIG. 2 shows a heating operation history for one day and an outside air temperature history for one day. In the heating operation history, one of various data (heating time [minutes], target temperature [° C.], number of terminals of the thermal valve in the open state, and heating load L [kWh]) for each type of heating operation. Information for each hour is stored. The outside air temperature DO is stored in the outside air temperature history every hour. Further, the non-volatile memory 112 stores the start time and the end time of the heating operation. In the case of FIG. 2, the non-volatile memory 112 stores 5:00 and 18:00 as the start time of the heating operation and 9:00 and 22:00 as the end time of the heating operation. There is. The control device 110 erases the operation history eight days ago every 24 hours (for example, every time the time reaches 0:00).

The heating level tables 130 and 132 will be described with reference to FIG. The heating level table 130 stores the ON time of the heat pump heat source when the hot water supply heating system 2 operates in the HB (hybrid) heating operation described later. The HB heating operation is an operation in which the second burner heating device 82 and the heat pump heat source are operated to heat water. The ON time is the time for operating the heat pump heat source in one cycle (20 minutes). The ON time is set differently for each heating level, and the heating level can be adjusted in 9 steps from level 1 to level 9 (MAX). Further, the heating level table 132 stores a target temperature DT when the hot water supply heating system 2 operates in the HP (heat pump) heating operation described later. The HP heating operation is an operation in which only the heat pump heat source is operated to heat water. The target temperature DT is the target temperature of water after heating by the heat pump heat source. The control device 110 controls the operation of the heat pump heat source so that the HP going temperature DH2 becomes the target temperature DT. The target temperature DT is set to a different temperature for each heating level, and the heating level can be adjusted in 9 steps from level 1 to level 9 (MAX). The HP return temperature in FIG. 3 indicates the temperature at which the temperature of the water passing through the thermistor 86 becomes a steady state when the HP going temperature DH2 is controlled to the target temperature DT.

Returning to FIG. 1, the remote controller 120 is connected to the control device 110. The user can input various information via the remote controller 120. The information input by the user to the remote controller 120 is output to the control device 110. The various information that can be input by the user are, for example, the start of the heating operation, the scheduled start time (reserved time) TS0 of the heating operation, the operation mode of the heating operation, the heating level, and the like. The operation mode of the heating operation is composed of a first operation mode and a second operation mode.

(Operation of hot water supply and heating system)
Next, the operation of the hot water supply / heating system 2 of this embodiment will be described. The hot water supply / heating system 2 can execute a heat storage operation, a hot water supply operation, and a heating operation. Hereinafter, each operation will be described.

(Heat storage operation)
The heat storage operation is an operation in which the water in the tank 10 is heated by the heat generated by the heat pump 50. When the control device 110 instructs the execution of the heat storage operation, the heat pump heat source starts operating and the first circulation pump 22 rotates.

As shown in FIG. 1, by operating the heat pump heat source, the high-temperature and high-pressure vapor-phase state refrigerant is sent into the refrigerant circulation path 52 passing through the three-fluid heat exchanger 58. Further, when the first circulation pump 22 rotates, the water in the tank 10 circulates in the tank water circulation path 20. That is, the water existing in the lower part of the tank 10 is introduced into the tank water circulation path 20, and when the introduced water passes through the three-fluid heat exchanger 58, it is heated by the heat of the refrigerant in the refrigerant circulation path 52. The heated water is returned to the top of the tank 10. As a result, hot water is stored in the tank 10. A layer of hot water is formed in the upper part of the tank 10, and a layer of cold water is formed in the lower part.

(Hot water supply operation)
The hot water supply operation is an operation of supplying the water in the tank 10 to the hot water supply tap 38. The hot water supply operation can also be executed during the above heat storage operation. When the hot water tap 38 is opened, the control device 110 opens the mixing valve 36a. Then, due to the water pressure from the tap water supply source 32, tap water flows into the lower part of the tank 10 from the tap water introduction path 24 (first introduction path 24a). At the same time, the hot water in the upper part of the tank 10 is supplied to the hot water tap 38 via the supply path 36.

When the temperature of the water supplied from the tank 10 to the supply path 36 (that is, the detection temperature of the thermistor 12) is higher than the hot water supply set temperature, the control device 110 adjusts the mixing valve 36a to adjust the second introduction path. Tap water is introduced from 24b into the supply channel 36. Therefore, the water supplied from the tank 10 and the tap water supplied from the second introduction path 24b are mixed in the supply path 36. The control device 110 adjusts the opening ratio of the mixing valve 36a so that the temperature of the water supplied to the hot water supply plug 38 matches the hot water supply set temperature. On the other hand, the control device 110 operates the first burner heating device 81 when the temperature of the water supplied from the tank 10 to the supply path 36 is lower than the hot water supply set temperature. Therefore, the water passing through the supply path 36 is heated by the first burner heating device 81. The heated water is mixed with water from the bypass passage 36b whose opening degree is adjusted by the bypass control valve 36c and is supplied to the hot water supply plug 38. The control device 110 controls the output of the first burner heating device 81 so that the temperature of the water supplied to the hot water tap 38 matches the set temperature of the hot water supply.

(Heating operation)
Next, the heating operation performed by the control device 110 will be described with reference to FIGS. 4 to 10. In the control device 110, when the operation for starting the heating operation is executed by the user on the remote controller 120, or when the operation for setting the scheduled start time TS0 of the heating operation is executed on the remote controller 120 by the user. , The heating process of FIG. 4 is started. The operation mode and heating level of the heating operation are also set by the user operating the remote controller 120.

(Heating process)
In step S2, the control device 110 determines whether or not the first operation mode has been selected by the user. When the first operation mode is selected (YES in step S2), the process proceeds to step S4. On the other hand, when the second operation mode is selected (NO in step S2), the process proceeds to step S18 (third heating process).

In step S4, the control device 110 determines whether or not the scheduled start time TS0 of the heating operation has been set by the user. If the scheduled start time TS0 is set by the user (YES in step S4), the process proceeds to step S6. On the other hand, when the scheduled start time TS0 is not set by the user (NO in step S4), the process proceeds to step S16 (first heating process). The case where the scheduled start time TS0 is not set by the user is the case where the user executes an operation for immediately starting the heating operation on the remote controller 120.

In step S6, the control device 110 executes the load leveling process (FIG. 5). In the load leveling process, the control device 110 determines whether or not the scheduled start time TS0 set by the user can be advanced, and if it can be advanced, sets a new scheduled start time TS1.

In step S8, the control device 110 determines whether or not the scheduled start time TS0 has been advanced in step S6. When the new scheduled start time TS1 is set, the control device 110 determines that the scheduled start time TS0 has been advanced. If a new scheduled start time TS1 is set (YES in step S8), the process proceeds to step S10. In step S10, the control device 110 monitors that the scheduled start time TS1 has arrived. When the scheduled start time TS1 arrives, the control device 110 determines YES in step S10, and the process proceeds to step S12 (second heating process).

On the other hand, if the scheduled start time TS0 has not been changed (NO in step S8), the process proceeds to step S14. In step S14, the control device 110 monitors that the scheduled start time TS0 has arrived. When the scheduled start time TS0 arrives, the control device 110 determines YES in step S14, and the process proceeds to step S16 (first heating process).

(Load leveling process)
Next, the load leveling process executed in step S6 of FIG. 4 will be described with reference to FIGS. 5 and 6. Note that FIG. 6 shows the hourly heating load L of the heating operation executed from 5:00 to 9:00 in FIG.

In step S22, the control device 110 determines whether or not the scheduled start time TS0 is included in the start time of the heating operation in the non-volatile memory 112. Specifically, the control device 110 confirms whether the start time of the heating operation in the non-volatile memory 112 includes a time that coincides with the scheduled start time TS0. When the scheduled start time TS0 is included in the start time of the heating operation in the non-volatile memory 112 (YES in step S22), the process proceeds to step S24. On the other hand, when the scheduled start time TS0 is not included in the start time of the heating operation in the non-volatile memory 112 (NO in step S22), the control device 110 ends the process of FIG. In the modified example, the control device 110 has the non-volatile memory 112 between the time when the first predetermined time T1 is subtracted from the scheduled start time TS0 and the time when the first predetermined time T1 is added to the scheduled start time TS0. If the start time of the heating operation in the room is included, it may be determined as YES in step S22. For example, if the first predetermined time T1 is 10 minutes, the scheduled start time TS0 is 6:00, and the heating operation history includes the start time of 5:55, YES in step S22. Judge.

In step S24, the control device 110 determines whether or not the load difference LD [kWh] of the heating load L exceeds the first predetermined load LP1 [kWh] (for example, 0.5 kWh). The control device 110 identifies the load difference LD by using the heating operation history in the non-volatile memory 112. The control device 110 has a second drive time from the time when the first drive time elapses from the first heating load L1 [kWh] from the start of the heating operation to the elapse of the first drive time (for example, 1 hour). The load difference LD is calculated by subtracting the second heating load L2 [kWh] until (for example, 1 hour) elapses. For example, as shown in FIG. 6, when the start time of the heating operation is 5:00, the control device 110 starts from the first heating load L1 from 5:00 to 6:00 to 6:00 to 7:00. The load difference LD is calculated by subtracting the second heating load L2. The first predetermined load LP1 is a value for determining that the effect of advancing the scheduled start time TS0 is small. When the load difference LD exceeds the first predetermined load LP1 (YES in step S24), the process proceeds to step S26. On the other hand, when the load difference LD is equal to or less than the first predetermined load LP1 (NO in step S24), the control device 110 ends the process of FIG.

In step S26, the control device 110 determines whether or not the first heating load L1 is less than the maximum load Lmax [kWh] of the heat pump heat source. The maximum load Lmax is a value when the heat pump heat source is operated at the maximum heating capacity Cmax [kW] for 3 hours. In the case of this embodiment, the maximum heating capacity Cmax of the heat pump heat source is 2 [kW], and the maximum load Lmax is 6 [kWh]. When the first heating load L1 is less than the maximum load Lmax (YES in step S26), the process proceeds to step S28. On the other hand, when the first heating load L1 is equal to or greater than the maximum load Lmax (NO in step S26), the control device 110 ends the process of FIG. The process of step S26 is a process for limiting the advance time TE, which will be described later. As a result, it is possible to prevent the user from feeling uncomfortable by executing the heating operation at a time significantly different from the scheduled start time TS0 set by the user.

In step S28, the control device 110 specifies the advance time TE of the scheduled start time TS0. First, the control device 110 divides the first heating load L1 by the maximum heating capacity Cmax of the heat pump heat source. Then, the advance time TE is specified by subtracting 1 hour from the calculated value. For example, when the first heating load is 4 [kWh], the advance time TE is 1 hour.

In step S30, the control device 110 determines whether or not the outside air temperature DO at the current time is less than the history outside air temperature DO1 corresponding to the current time in the heating operation history. When the outside air temperature DO is less than the history outside air temperature DO1 (YES in step S30), the process proceeds to step S32. On the other hand, when the outside air temperature DO is equal to or higher than the history outside air temperature DO1 (NO in step S30), the process skips step S32 and proceeds to step S34.

In step S32, the control device 110 corrects the advance time TE specified in step S28. Specifically, the control device 110 calculates the correction time TA according to the outside air temperature difference DOD obtained by subtracting the outside air temperature DO from the history outside air temperature DO1. For example, when the outside air temperature difference DOD is less than 3 ° C., the correction time TA is set to 20 minutes, and when the outside air temperature difference DOD is 3 ° C. or more and less than 6 ° C., the correction time TA is set to 40 minutes. When the outside air temperature difference DOD is 6 ° C. or higher, the correction time TA is set to 60 minutes. Then, the correction time TA is added to the advance time TE specified in step S28.

In step S34, the control device 110 sets a new scheduled start time TS1 using the advance time TE specified in step S28 or step S32. The control device 110 calculates a new scheduled start time TS1 by subtracting the advance time TE from the scheduled start time TS0. The control device 110 stores the new scheduled start time TS1 in the non-volatile memory 112. Further, the control device 110 stores the time obtained by adding the first drive time to the scheduled start time TS0 in the non-volatile memory 112 as the heating operation change time TC. When the step S34 is completed, the control device 110 ends the process of FIG.

(First heating process)
Next, the first heating process executed in step S16 of FIG. 4 will be described with reference to FIG. 7. The first heating process is executed when the first operation mode is set by the user.

In step S42, the control device 110 determines whether or not the user has selected to perform HD (hot dash) operation. The HD operation is an operation for rapidly heating the living room by using the second burner heating device 82. The point that the second burner heating device 82 is used is the same as the gas heating operation in step S48 described later, but the heating capacity of the second burner heating device 82 is different from the gas heating operation. The control device 110 controls the heating capacity of the second burner heating device 82 so that the burner forward temperature DB2 becomes 72 ° C. in the case of HD operation, and causes the burner forward temperature DB2 to reach 45 ° C. in the case of gas heating operation. The heating capacity of the second burner heating device 82 is controlled. In HD operation and gas heating operation, heating by the heat pump heat source is not performed. If the execution of the HD operation is selected (YES in step S42), the process proceeds to step S44. On the other hand, when the execution of the HD operation is not selected (NO in step S42), the process skips step S44 and proceeds to step S46.

In step S44, the control device 110 executes HD operation. The control device 110 controls the heating capacity of the second burner heating device 82 so that the temperature of the water passing through the second burner heating device 82 becomes 72 ° C. When the HD drive time (for example, 60 minutes) elapses from the start of the HD operation, the control device 110 ends the HD operation, and the process proceeds to step S46.

In step S46, the control device 110 determines whether or not the start condition of the HB heating operation is satisfied. The control device 110 determines whether or not the outside air temperature DO at the current time exceeds the first predetermined temperature D1 (for example, -3 ° C.). When the outside air temperature DO is equal to or lower than the first predetermined temperature D1 (NO in step S46), the process proceeds to step S48. In step S48, the control device 110 executes a gas heating operation. The control device 110 controls the heating capacity of the second burner heating device 82 so that the temperature of the water passing through the second burner heating device 82 becomes 45 ° C.

On the other hand, when the outside air temperature DO exceeds the first predetermined temperature D1 (YES in step S46), the process proceeds to step S50. That is, the control device 110 continues the gas heating operation (step S48) until it is determined to be YES in step S46.

In step S50, the control device 110 determines whether or not the start condition of the HP heating operation is satisfied. In the control device 110, the current heating capacity HC [kW] of the hot water supply heating system 2 is less than the maximum heating capacity Cmax [kW] of the heat pump heat source, and the first HP return temperature difference DHD1 is the second predetermined temperature D2. When it is less than (for example, 5 ° C.), it is determined that the start condition of the HP heating operation is satisfied. The first HP return temperature difference DHD1 is calculated by subtracting the current HP return temperature DH1 from the HP return temperature corresponding to the heating level set by the user (hereinafter, referred to as a heating level set value). The current heating capacity HC is the sum of the heating capacity HC1 [kW] of the second burner heating device 82 and the heating capacity HC2 [kW] of the heat pump heat source. The control device 110 calculates the heating capacity HC1 of the second burner heating device 82 by using the burner return temperature DB1, the burner outbound temperature DB2, and the flow rate F1 of water circulating in the heating outbound path 72. First, the control device 110 calculates the flow rate F1 by using the number of terminals of the thermal valve in the open state. Then, the control device 110 calculates the heating capacity HC1 of the second burner heating device 82 by subtracting the burner return temperature DB1 from the burner forward temperature DB2 and multiplying the subtracted value by the flow rate F1. Further, the control device 110 calculates the heating capacity HC2 of the heat pump heat source by using the HP return temperature DH1, the HP going temperature DH2, and the flow rate F2 of the water circulating in the heat recovery path 88. First, the control device 110 calculates the flow rate F2 by multiplying the flow rate F1 by the opening degree of the adjusting valve 90. Then, the control device 110 calculates the heating capacity HC2 of the heat pump heat source by subtracting the HP return temperature DH1 from the HP going temperature DH2 and multiplying the subtracted value by the flow rate F2. After that, the control device 110 adds the heating capacity HC2 to the heating capacity HC1 to calculate the current heating capacity HC.

When the heating capacity HC exceeds the maximum heating capacity Cmax of the heat pump heat source, or when the first HP return temperature difference DHD1 is equal to or higher than the second predetermined temperature D2 (NO in step S50), the process proceeds to step S52. move on. In step S52, the control device 110 executes the HB heating operation. In the HB heating operation, the control device 110 controls the operation of the heat pump heat source according to the heating level set value and the heating level table 130, and operates the second burner heating device 82 so that the burner forward temperature DB2 becomes 45 ° C. Control. The control device 110 continues the HB heating operation (step S52) until it is determined to be YES in step S50. On the other hand, when the heating capacity HC is less than the maximum heating capacity Cmax and the first HP return temperature difference DHD1 is less than the second predetermined temperature D2 (YES in step S50), the process proceeds to step S54.

In step S54, the control device 110 sets the heating level of the HP heating operation to MAX (level 9). Then, in step S56, the control device 110 executes the HP heating operation. When the heating level is MAX, the heating capacity of the heat pump heat source is the maximum heating capacity Cmax.

In step S58, the control device 110 monitors that a second predetermined time T2 (for example, 20 minutes) has elapsed since the HP heating operation was started. When the second predetermined time T2 elapses, the control device 110 determines YES in step S58, and the process proceeds to step S60.

In step S60, the control device 110 determines whether or not the current heating level is higher than the heating level set value. If the current heating level is higher than the heating level set value (YES in step S60), the process proceeds to step S62. On the other hand, when the current heating level is the same as the heating level set value (NO in step S60), the process returns to step S58. Therefore, the control device 110 does not lower the current heating level to a level below the heating level set value.

In step S62, the control device 110 determines whether or not the second HP return temperature difference DHD2 exceeds the third predetermined temperature D3 (for example, 2 ° C.). The second HP return temperature difference DHD2 is calculated by subtracting the HP return temperature DH1 before the third predetermined time T3 (for example, 1 hour) from the current HP return temperature DH1. When the second HP return temperature difference DHD2 exceeds the third predetermined temperature D3 (YES in step S62), the process proceeds to step S64. On the other hand, when the second HP return temperature difference DHD2 is equal to or less than the third predetermined temperature D3 (NO in step S62), the process returns to step S58.

In step S64, the control device 110 lowers the current heating level by one level. For example, if the current heating level is level 9 (MAX), it is lowered to level 8. In this way, the control device 110 adjusts the heating level according to the second HP return temperature difference DHD2, and adjusts the heating capacity of the heat pump heat source. While the first heating process is continuing, the control device 110 determines YES in step S58 every time the second predetermined time T2 elapses, and executes the processes after step S60.

(Second heating process)
Next, the second heating process executed in step S12 of FIG. 4 will be described with reference to FIG. The second heating process is a process executed when a new scheduled start time TS1 is set.

Step S72 and step S74 are the same as steps S54 and S56 of FIG. In step S76, the control device 110 monitors that the heating operation change time TC has arrived. Then, when the heating operation change time TC arrives, the control device 110 determines YES in step S76, and the process proceeds to step S78.

In step S78, the control device 110 executes the heating operation executed at the heating operation change time TC in the non-volatile memory 112. The control device 110 executes either the HB heating operation or the HP heating operation. For example, when the heating operation history shown in FIG. 2 is stored and the heating operation change time TC is 6:00, the control device 110 executes the HB heating operation. Even if the HP heating operation is started at the scheduled start time TS1, the heating capacity HC required at the time of the heating operation change time TC is likely to be the same as the time of the heating operation change time TC in the heating operation history. .. Therefore, for example, when the HB heating operation is executed at the heating operation change time TC in the heating operation history, the HB heating operation is also performed at the heating operation change time TC after the HP heating operation is started at the scheduled start time TS1. It is preferable to execute. By executing the process of step S78, even if the HP heating operation is started at the scheduled start time TS1, the operation can be the same as the operation executed at the heating operation change time TC in the heating operation history.

In step S80, the control device 110 determines whether or not the HB heating operation is being executed. When the HB heating operation is being executed (YES in step S80), the process proceeds to step S50 in FIG. 7. On the other hand, when the HP heating operation is being executed (NO in step S80), the process proceeds to step S58 in FIG.

(Third heating process)
Next, the third heating process executed in step S18 of FIG. 4 will be described with reference to FIG. The third heating process is a process executed when the second operation mode is selected by the user.

Steps S92 to S102 are the same as steps S54 to S62 of FIG. In step S94, the control device 110 stores the outside air temperature DO at the current time as the start outside air temperature DO2 in the non-volatile memory 112. If NO is determined in step S98, the process proceeds to step S104.

In step S104, the control device 110 determines whether or not the outside air temperature DO at the current time exceeds the start outside air temperature DO2. If the outside air temperature DO exceeds the start outside air temperature DO2 (YES in step S104), the process proceeds to step S106. On the other hand, when the outside air temperature DO is equal to or lower than the start outside air temperature DO2 (NO in step S104), the process returns to step S96.

In step S106, the control device 110 determines whether or not the second HP return temperature difference DHD2 is less than the fourth predetermined temperature D4 (for example, -2 ° C.). When the second HP return temperature difference DHD2 is less than the fourth predetermined temperature D4 (YES in step S106), the process proceeds to step S108. In step S98, the control device 110 raises the heating level by one level. On the other hand, when the second HP return temperature difference DHD2 is equal to or higher than the fourth predetermined temperature D4 (NO in step S106), the process returns to step S96. While the third heating process continues, the control device 110 determines YES in step S96 every second predetermined time T2, and executes the processes after step S98.

(Heating operation history memory processing)
Next, the operation history storage process executed in parallel with the heating process of FIG. 4 will be described with reference to FIG.

In step S112, the control device 110 monitors that the first or second heating process of FIG. 5 is started. When the control device 110 determines YES in step S10 or step S14 of FIG. 4, it determines YES in step S112, and the process proceeds to step S114.

In step S114, the control device 110 monitors that a fourth predetermined time T4 (for example, one hour) has elapsed from the start of the first or second heating process. When the fourth predetermined time T4 elapses from the start of the first or second heating process, the control device 110 determines YES in step S114, and the process proceeds to step S116.

In step S116, the control device 110 stores the operating state from the start of the first or second heating process to the elapse of the third predetermined time T3. The control device 110 stores the heating time, the target temperature of the heating operation, the number of terminals in the open state, and the heating load L in the heating operation history of the non-volatile memory 112 for each heating operation (see FIG. 2). The heating load L can be calculated using the current heating capacity HC of the hot water supply heating system 2. When step S116 is completed, the process returns to step S114. When the first heating process or the second heating process is continued, the control device 110 determines YES in step S114 every time the fourth predetermined time T4 elapses after determining YES in step S114. To do. Therefore, the control device 110 executes the process of step S116 every fourth predetermined time T4. The control device 110 ends the process of FIG. 10 when the first or second heating process is completed.

(Effect of load leveling process)
Next, the effect of executing the load leveling process of FIG. 5 will be described with reference to FIGS. 11 and 12. A heating process executed when the user sets the scheduled start time TS0 to 5:00 while the heating operation history shown in FIG. 2 is stored will be described. At the same time as setting the scheduled start time T0, the user sets the operation mode to the first operation mode and sets the heating level to level 6. Further, the outside air temperature DO is the same as the outside air temperature history in the heating operation history.

First, the control device 110 determines YES in steps S2 and S4 of FIG. 4, and executes the load leveling process (FIG. 5) of step S6.

In the load leveling process of FIG. 5, the control device 110 determines YES in step S22 because the start time of the heating operation of the thick frame portion of FIG. 2 is 5:00. Next, the control device 110 subtracts the second heating load L2 (2 kW) from 6:00 to 7:00 from the first heating load L1 (4 kWh) from 5:00 to 6:00 to load the load. The difference LD is calculated as 2 kWh, and the control device 110 determines that the load difference LD (2 kWh) is equal to or greater than the first predetermined load LP1 (0.5 kWh) (YES in step S24). Next, the control device 110 determines that the first heating load L1 (4 kWh) from 5:00 to 6:00 is less than the maximum load Lmax (6 kWh) (YES in step S26). Next, the control device 110 divides the first heating load L1 (4kWh) by the maximum heating capacity Cmax (2kW) of the heat pump heat source, subtracts 1 hour from the calculated time, and determines that the advance time TE is 1 hour. Identify (step S28). Then, the control device 110 determines NO in step S30, sets 4:00, which is the time obtained by subtracting one hour from 5:00, as the new scheduled start time TS1 (step S34), and stores it in the non-volatile memory 112. To do. Further, the control device 110 stores 6:00 as the heating operation change time TC in the non-volatile memory 112. After that, the process returns to step S8 of the heating process (FIG. 4).

The control device 110 determines YES in step S8 of FIG. 4, determines YES in step S10 when the time reaches 4:00, and executes the second heating process (FIG. 8).

In the second heating process of FIG. 8, the control device 110 sets the heating level to MAX (step S72) and starts the HP heating operation (step S74). Then, when the time reaches the heating operation change time TC (6:00), the control device 110 determines YES in step S76 and executes the heating operation change time TC (6:00) in the non-volatile memory 112. The HB heating operation that has been performed is executed (step S78). Then, the control device 110 determines YES in step S80, and proceeds to step S50 in FIG. The subsequent heating operation is the same as the heating operation in the heating operation history.

From the above, as shown in FIG. 11, the control device 110 executes the HP heating operation from 4:00 to 6:00, and executes the HB heating operation from 6:00 to 8:00. The HP heating operation is executed between 00 and 9:00. In this case, as shown in FIG. 12, the first heating load L1 (4 kWh) from 5:00 to 6:00 is the heating load (2 kWh) from 4:00 to 5:00 and 5:00 to 6:00. The heating load is distributed to 2 kWh. That is, the heating load L immediately after the start of the heating operation can be reduced. Thereby, the time for executing the HP heating operation can be increased. As a result, the energy efficiency of the hot water supply / heating system 2 can be improved.

According to the above configuration, the control device 110 is a hot water supply heating system based on the burner return temperature DB1, the burner forward temperature DB2, the HP return temperature DH1, the HP forward temperature DH2, and the number of terminals of the thermal valve in the open state. The current heating capacity HC of 2 can be calculated. Then, the control device can calculate the heating load L by using the heating capacity HC. Therefore, the control device 110 can appropriately determine which of the gas heating operation, the HB heating operation, and the HP heating operation is to be executed according to the heating load L.

Further, in the above embodiment, the non-volatile memory 112 stores the start time of the heating operation, the end time of the heating operation, and the heating load during the heating operation for the past 7 days. Generally, the heating load L is highest immediately after the start of the heating operation, and then gradually decreases. According to the above configuration, the control device 110 can advance the scheduled start time TS0 to the new scheduled start time TS1 based on the heating load L in the non-volatile memory 112. Therefore, the heating load L immediately after the start of the heating operation can be distributed to the heating operation executed between the new scheduled start time TS1 and the scheduled start time TS0. Therefore, the heating load L immediately after the start of the heating operation can be reduced. As a result, it is possible to increase the possibility that the water can be heated by driving the heat pump heat source immediately after the start of the heating operation. As a result, the energy efficiency of the hot water supply / heating system 2 can be improved.

Further, in the above embodiment, the control device 110 starts from the first heating load L1 before the first drive time elapses from the scheduled start time TS0 in the non-volatile memory 112, and from the first drive time to the second. When the load difference LD obtained by subtracting the second heating load L2 until the drive time elapses exceeds the first predetermined load LP1, a new scheduled start time TS1 is set. According to such a configuration, the scheduled start time TS0 is set only when the load difference LD is relatively large and the energy efficiency of the hot water supply / heating system 2 can be improved by setting a new scheduled start time TS1. The new scheduled start time TS1 can be advanced.

Further, in the above embodiment, when the current outside air temperature DO is less than the historical outside air temperature DO1, the control device 110 corrects the advance time TE to further advance the new scheduled start time TS1. According to such a configuration, the heating load L, which is expected to increase due to the low outside air temperature, can be distributed to the heating operations executed before the scheduled start time TS0.

Further, in the above embodiment, the control device 110 lowers the heating level by one level when the second HP return temperature difference DHD2 exceeds the second predetermined temperature D2. If the change in the HP return temperature DH1 for each third predetermined time T3 is large, it is highly possible that the heating capacity of the heat pump heat source is not appropriate. According to the above configuration, the control device 110 can appropriately switch the heating capacity of the heat pump heat source based on the second HP return temperature difference DHD2.

(Correspondence)
Water is an example of a "heat medium". The hot water supply and heating system 2 is an example of a “heating system”. The second burner heating device 82 is an example of a “combustion heat source”. The second circulation pump 74 is an example of a “circulation pump”. Thermistors 76, 78, 86, 92 are examples of "temperature sensors". The non-volatile memory 112 is an example of a “storage unit”. HD operation, gas heating operation, HB heating operation, and HP heating operation are examples of "first heating operation", "second heating operation", and "third heating operation", respectively. The scheduled start time TS0 and the new scheduled start time TS1 are examples of the "first scheduled start time" and the "second scheduled start time", respectively. The new scheduled start time TS1 calculated through step S32 is an example of the “third scheduled start time”. The thermistor 86 is an example of a “return temperature sensor”. The second HP return temperature difference DHD2 is an example of the “return temperature difference”. The fourth predetermined time T4 is an example of the “predetermined time”.

Although the examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above.

(Modification example 1)
The control device 110 sets the advance time TE when the first heating load L1 from the start of the heating operation to the elapse of the first drive time exceeds the second predetermined load LP2 (for example, 4 kWh). It may be calculated. The second predetermined load LP2 is a value for determining that the first heating load L1 is relatively large.

(Modification 2)
In the load leveling process of FIG. 5, after step S34, the heating load L during the HB heating operation stored in the non-volatile memory 112 after the heating operation change time TC is equal to or less than the HP maximum load (2 kWh) of the heat pump heat source. In the case of, the process of changing the HB heating operation to the HP heating operation may be added. When this process is applied, the control device 110 also executes the HP heating operation from 6:00 to 8:00 in FIG. Therefore, the time during which the HP heating operation is executed can be lengthened.

The technical elements described herein or in the drawings exhibit their 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 techniques illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

2: Hot water supply and heating system 10: Tanks 12, 14, 16, 18: Thermista 20: Tank water circulation path 22: Circulation pump 24: Tap water introduction path 24a: First introduction path 24b: Second introduction path 26, 28: Non-stop Valve 30: Water amount sensor 32: Tap water supply source 34: Water amount sensor 36: Supply path 36a: Mixing valve 36b: Bypass path 36c: Bypass control valve 38: Hot water tap 50: Heat pump 52: Refrigerator circulation path 54: Heat exchanger 56 : Fan 58: Three-fluid heat exchanger 60: Expansion valve 62: Compressor 70: Systurn 71: Heating water circulation path 72: Heating outbound path 74: Circulation pump 78: Thermista 81: Burner heating device 82: Burner heating device 84: Heating Return path 86: Thermista 88: Heat recovery path 90: Adjusting valve 92: Thermista 94: Bypass path 96: Circulation flow path 98, 100: Thermista 104: Hot water supply system 106: Heat pump system 108: Heating system 110: Control device 112: Non-volatile Memory 120: Remote control H1, H2, H3, H4, H5, H6: Heating terminal V1, V2, V3, V4, V5, V6: Thermal valve

Claims (4)

It is a heating system that supplies a heat medium to a plurality of heating terminals that are heated by heat radiation from the heat medium, and each of the plurality of heating terminals is provided with a plurality of heat valves correspondingly. Each of the thermal valves can be switched between an open state in which the heat medium is supplied to the corresponding heating terminal and a closed state in which the heat medium is not supplied to the corresponding heating terminal. the system,
A combustion heat source that heats the heat medium and
A heat pump heat source that heats the heat medium,
A circulation pump that circulates the heat medium and
A temperature sensor that measures the temperature of the heat medium flowing through the heating path,
It is equipped with a control device capable of switching the state of the plurality of thermal valves.
Wherein the control device, Propelled by one storage unit for storing the number of said plurality of thermally activated valve is provided,
The control device has a first heating operation in which the heat medium is heated by driving the combustion heat source without driving the heat pump heat source, and the heat medium is driven by driving the combustion heat source and the heat pump heat source. It is possible to execute a heating operation including a second heating operation for heating and a third heating operation for heating the heat medium by driving the heat pump heat source without driving the combustion heat source.
Said controller, during execution of the heating operation, on the basis of the temperature measured the the number of the heat valve operating in an open state by said temperature sensor, to calculate the heating load on the plurality of heating terminal,
The storage unit stores the start time of the heating operation, the end time of the heating operation, and the heating load during the heating operation in the past predetermined period.
When the heating operation is reserved to start at the first scheduled start time, the control device sets the first scheduled start time based on the heating load stored in the storage unit. , Advance to the second scheduled start time, which is earlier than the first scheduled start time.
Heating system. When the heating operation is reserved to start at the first scheduled start time, the control device has a first drive time from the first scheduled start time stored in the storage unit. The difference between the first heating load until the elapse and the second heating load stored in the storage unit from the time when the first drive time elapses to the time when the second drive time elapses. based on, the first scheduled start time, accelerate early the second scheduled start time than the first scheduled start time, heating system according to claim 1. It also has an outside air temperature sensor that measures the outside air temperature.
The storage unit stores the outside air temperature in the past predetermined period.
When the outside air temperature at the current time is lower than the outside temperature at the same time as the current time stored in the storage unit, the control device sets the second scheduled start time to the second scheduled start time. The heating system according to claim 1 or 2 , which advances to a third scheduled start time earlier than the time. It is a heating system that supplies a heat medium to a plurality of heating terminals that are heated by heat radiation from the heat medium, and each of the plurality of heating terminals is provided with a plurality of heat valves correspondingly. Each of the thermal valves can be switched between an open state in which the heat medium is supplied to the corresponding heating terminal and a closed state in which the heat medium is not supplied to the corresponding heating terminal. the system,
A combustion heat source that heats the heat medium and
A heat pump heat source that heats the heat medium,
A circulation pump that circulates the heat medium and
A temperature sensor for measuring the temperature of the heat medium flowing through the heating path, the temperature sensor including a return temperature sensor for measuring the return temperature of the heat medium returning to the heating path from the plurality of heating terminals , and the temperature sensor.
It is equipped with a control device capable of switching the state of the plurality of thermal valves.
The control device has a storage unit that stores the number of the plurality of thermal valves installed.
The control device has a first heating operation in which the heat medium is heated by driving the combustion heat source without driving the heat pump heat source, and the heat medium is driven by driving the combustion heat source and the heat pump heat source. It is possible to execute a heating operation including a second heating operation for heating and a third heating operation for heating the heat medium by driving the heat pump heat source without driving the combustion heat source.
Said controller, during execution of the heating operation, on the basis of the temperature measured the the number of the heat valve operating in an open state by said temperature sensor, to calculate the heating load on the plurality of heating terminal,
The control device can switch the heating capacity of the heat pump heat source to a plurality of stages while the third heating operation is being executed.
The control device identifies the return temperature difference between the current return temperature and the return temperature before the predetermined time at predetermined time intervals during the execution of the third heating operation, and is based on the return temperature difference. , Switching the heating capacity of the heat pump heat source,
Heating system.

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