EP3258185B1 - Système d'alimentation en chaleur - Google Patents

Système d'alimentation en chaleur Download PDF

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Publication number
EP3258185B1
EP3258185B1 EP15881947.4A EP15881947A EP3258185B1 EP 3258185 B1 EP3258185 B1 EP 3258185B1 EP 15881947 A EP15881947 A EP 15881947A EP 3258185 B1 EP3258185 B1 EP 3258185B1
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EP
European Patent Office
Prior art keywords
heat source
temperature
heating
heating medium
main
Prior art date
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Application number
EP15881947.4A
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German (de)
English (en)
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EP3258185A1 (fr
EP3258185A4 (fr
Inventor
Satoshi Akagi
Yasunari Matsumura
Naoki SHIBAZAKI
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication of EP3258185A4 publication Critical patent/EP3258185A4/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0089—Additional heating means, e.g. electric heated buffer tanks or electric continuous flow heaters, located close to the consumer, e.g. directly before the water taps in bathrooms, in domestic hot water lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible

Definitions

  • the present invention relates to a heat supply system.
  • PTL 1 listed below discloses a heat pump water heater that includes a water heater circuit in which a refrigerant-water heat exchanger for a heat pump and a heating device including an electric heater are connected sequentially.
  • This heat pump water heater includes a first temperature detector that is provided downstream of the refrigerant-water heat exchanger, and a second temperature detector that is provided downstream of the heating device.
  • the electric heater of the heating device in a case where the set temperature of hot water is relatively low, the electric heater of the heating device is brought into a non-energized state, and the rotation speed of a circulation pump is controlled using a signal of the first temperature detector such that the temperature of hot water at the outlet of the refrigerant-water heat exchanger becomes constant.
  • the electric heater of the heating device is energized, and the rotation speed of the circulation pump is controlled using a signal of the second temperature detector such that the temperature of hot water at the outlet of the heating device becomes constant.
  • JP S60 164157 A discloses a heat supply system according to the preamble of claim 1 comprising a first heating device and a second heating device for providing hot water which are arranged in a water circulating circuit.
  • the temperature of the hot water is controlled to be constant by a control mechanism of circulating water amount.
  • JP H5 256520 describes a hot water supply system which uses an auxiliary heat source which is operated during a period in which the output of a heat pump during starting the operation is stabilized. Thereby, a ratio of a quantity of utilizable hot water to the capacity of a hot water storage tank can be maximized.
  • DE 3322612 A1 refers to a hot water supply system comprising a second heat source which is controlled depending on the temperature of the hot water.
  • An object of the present invention is to prevent undershooting and overshooting of the temperature of a heating medium in a heat supply system that includes a first heating device and a second heating device.
  • a heat supply system of the invention is defined by the features of claim 1. Preferred embodiments are represented in the dependent claims.
  • a heat supply system of the invention includes: a pump configured to pump a heating medium; a first heating device configured to heat the heating medium; a second heating device configured to heat the heating medium downstream of the first heating device; and a controller configured to reduce a heating power of the first heating device concurrently with or before activation of the second heating device, in a case where the second heating device is activated in a state in which the first heating device is operated without operating the second heating device.
  • the present invention it becomes possible to prevent the undershooting and the overshooting of the temperature of the heating medium in the heat supply system that includes the first heating device and the second heating device.
  • Fig. 1 is a configuration diagram showing a heat supply system of Embodiment 1 of the present invention.
  • a heat supply system 1 of the present embodiment shown in Fig. 1 is a hot water supply indoor-heating system.
  • the heat supply system 1 includes a first unit 2, a second unit 3, and a controller 100.
  • the first unit 2 is placed outdoors, and the second unit 3 is placed indoors.
  • the second unit 3 may also be placed outdoors.
  • the first unit 2 and the second unit 3 are connected via heating medium pipes 4 and 5.
  • the first unit 2 includes a first casing in which a main heat source 6 is housed.
  • the main heat source 6 is an example of a first heating device that heats a liquid heating medium.
  • As the heating medium it is possible to use, e.g., water, brine, and antifreeze solution.
  • the main heat source 6 in the present embodiment is a heat pump heating device.
  • the main heat source 6 includes a refrigerant circuit.
  • the refrigerant circuit includes a compressor 7, a high-temperature side heat exchanger 8, a decompression device 9, and a low-temperature side heat exchanger 10.
  • the main heat source 6 heats the heating medium by performing an operation of a heat pump cycle (refrigeration cycle) with the refrigerant circuit.
  • the high-temperature side heat exchanger 8 heats the heating medium by exchanging heat between the refrigerant compressed by the compressor 7 and the heating medium.
  • the decompression device 9 reduces the pressure of the refrigerant having passed through the high-temperature side heat exchanger 8.
  • the decompression device 9 is constituted by, e.g., an expansion valve.
  • the low-temperature side heat exchanger 10 is an evaporator that evaporates the refrigerant having passed through the decompression device 9. In the present embodiment, the low-temperature side heat exchanger 10 exchanges heat between outdoor air and the refrigerant.
  • the main heat source 6 includes a blower 11 that blows outside air into the low-temperature side heat exchanger 10.
  • the low-temperature side heat exchanger 10 may exchange heat between the heat source other than the outside air (e.g., groundwater, wastewater, and solar heated water) and the refrigerant.
  • the refrigerant is preferably CO 2 .
  • the compressor 7, the decompression device 9, and the blower 11 are connected to the controller 100.
  • the controller 100 is capable of controlling the heating power of the main heat source 6.
  • the heating power denotes an amount of heat per unit time that the heating medium receives.
  • the controller 100 is capable of controlling the heating power of the main heat source 6 by, e.g., changing the driving frequency of the compressor 7 using inverter control.
  • the controller 100 may control the heating power of the main heat source 6 by changing the opening of the decompression device 9.
  • the second unit 3 includes a second casing in which an auxiliary heat source 12 is housed.
  • the auxiliary heat source 12 is an example of a second heating device that heats the heating medium downstream of the high-temperature side heat exchanger 8 of the main heat source 6.
  • the auxiliary heat source 12 it is possible to use, e.g., an electric heater or a fuel heater.
  • the fuel may be any fuel such as gas, kerosene, heavy oil, and coal.
  • the auxiliary heat source 12 is operated when the heating power of the main heat source 6 is insufficient, and compensates for the insufficiency of the heating power.
  • An example of the case where the heating power of the main heat source 6 becomes insufficient includes the case where the temperature of the medium (outdoor air in the present embodiment) used in the heat exchange with the refrigerant in the low-temperature side heat exchanger 10 of the main heat source 6 is low.
  • a hot water tank 13, a hot water supply heat exchanger 14, a heating medium pump 15, a water pump 16, and a switching valve 17 are further housed.
  • the auxiliary heat source 12, the heating medium pump 15, the water pump 16, and the switching valve 17 are connected to the controller 100.
  • the hot water supply heat exchanger 14 heats water by exchanging heat between the heating medium and water.
  • the outlet of the heating medium of the hot water supply heat exchanger 14 is connected to the inlet of the heating medium pump 15.
  • the outlet of the heating medium pump 15 is connected to the inlet of the heating medium of the high-temperature side heat exchanger 8 in the first unit 2 via the heating medium pipe 4.
  • the outlet of the heating medium of the high-temperature side heat exchanger 8 is connected to the inlet of the auxiliary heat source 12 in the second unit 3 via the heating medium pipe 5.
  • the switching valve 17 has an A port, a B port, and a C port.
  • the switching valve 17 is capable of switching between a state in which the A port is caused to communicate with the B port and the C port is closed and a state in which the A port is caused to communicate with the C port and the B port is closed.
  • the switching valve 17 may also be capable of switching to a state in which the heating medium flowing in from the A port is distributed to the B port and the C port.
  • the outlet of the auxiliary heat source 12 is connected to the A port of the switching valve 17.
  • the B port of the switching valve 17 is connected to the inlet of the heating medium of the hot water supply heat exchanger 14.
  • Water is stored in the hot water tank 13.
  • the hot water tank 13 it is possible to form temperature stratification in which the upper side has high temperature and the lower side has low temperature due to a difference in the density of water caused by a difference in temperature.
  • Clean water supplied from a water source 40 such as water works passes through a water supply pipe 18 and flows into the lower portion of the hot water tank 13.
  • a heat accumulating circuit that accumulates heat in the hot water tank 13
  • the lower portion of the hot water tank 13 is connected to the inlet of water of the hot water supply heat exchanger 14, and the outlet of water of the hot water supply heat exchanger 14 is connected to the upper portion of the hot water tank 13.
  • the water pump 16 circulates water to the heat accumulating circuit.
  • a hot water supply pipe 19 is connected to the upper portion of the hot water tank 13.
  • the downstream side of the hot water supply pipe 19 is connected to a hot water faucet 20 outside the second unit 3.
  • hot water faucet 20 When the hot water faucet 20 is opened, hot water stored in the hot water tank 13 is supplied to the hot water faucet 20 through the hot water supply pipe 19.
  • a mixing valve (depiction thereof is omitted) for mixing hot water and cold water to adjust temperature may be disposed in the middle of the hot water supply pipe 19.
  • An indoor-heating appliance 21 warms indoor air by using heat of the heating medium supplied from the second unit 3.
  • the C port of the switching valve 17 is connected to the inlet of the heating medium of the indoor-heating appliance 21 via a heating medium pipe 22.
  • One end of a heating medium pipe 23 is connected to the outlet of the heating medium of the indoor-heating appliance 21.
  • the other end of the heating medium pipe 23 is connected to a flow path between the outlet of the heating medium of the hot water supply heat exchanger 14 and the inlet of the heating medium pump 15.
  • the indoor-heating appliance 21 it is possible to use, e.g., a floor heating panel, a radiator, a panel heater, and a fan convector.
  • a plurality of the indoor-heating appliances 21 may also be connected between the heating medium pipe 22 and the heating medium pipe 23.
  • a method for connecting the plurality of the indoor-heating appliances 21 may be any of series connection, parallel connection, and a combination of the series connection and the parallel connection.
  • Each of the hot water tank 13, the hot water supply heat exchanger 14, the hot water faucet 20, and the indoor-heating appliance 21 is an example of a heat use terminal as a terminal that uses heat supplied by the heat supply system 1.
  • the heat use terminal may also be a terminal other than the heat use terminals mentioned above.
  • the heat use terminal may also be a terminal that uses heat by directly discharging a heated heating medium.
  • the number of the heat use terminals does not need to be plural as in the present embodiment, and the number thereof may also be one.
  • each of the heating medium pump 15 and the water pump 16 output or rotation speed thereof is preferably variable.
  • the pump that includes a pulse width modulation control (PWM control) type DC motor of which the output or rotation speed can be changed with a speed command voltage from the controller 100 can be preferably used.
  • an auxiliary thermistor 24 is disposed in the heating medium pipe 5 downstream of the main heat source 6 and upstream of the auxiliary heat source 12.
  • the auxiliary thermistor 24 is an example of a first temperature sensor that detects the temperature of the heating medium downstream of the first heating device (the main heat source 6) and upstream of the second heating device (the auxiliary heat source 12).
  • the auxiliary thermistor 24 is disposed in the first unit 2.
  • the length of a flow path from the main heat source 6 to the auxiliary thermistor 24 is preferably shorter than the length of a flow path from the auxiliary thermistor 24 to the auxiliary heat source 12.
  • the temperature of the heating medium downstream of the main heat source 6 and upstream of the auxiliary heat source 12 is hereinafter referred to as an "outlet temperature of the main heat source 6".
  • the auxiliary thermistor 24 is capable of detecting the outlet temperature of the main heat source 6.
  • a main thermistor 25 is disposed in a flow path of the heating medium downstream of the auxiliary heat source 12 and upstream of the heat use terminal.
  • the main thermistor 25 is an example of a second temperature sensor that detects the temperature of the heating medium downstream of the second heating device (the auxiliary heat source 12).
  • the main thermistor 25 detects the temperature of the heating medium downstream of the auxiliary heat source 12 and upstream of the switching valve 17.
  • the temperature of the heating medium downstream of the auxiliary heat source 12 is hereinafter referred to as a "heating medium supply temperature".
  • the main thermistor 25 is capable of detecting the heating medium supply temperature.
  • a low-temperature thermistor 26 is disposed in a flow path of the heating medium downstream of the heat use terminal and upstream of the main heat source 6.
  • the low-temperature thermistor 26 is an example of a third temperature sensor that detects the temperature of the heating medium upstream of the first heating device (the main heat source 6).
  • the low-temperature thermistor 26 is disposed upstream of the heating medium pump 15.
  • the low-temperature thermistor 26 may also be disposed in the heating medium pipe 4 downstream of the heating medium pump 15.
  • a flow rate sensor 27 detects the flow rate of the heating medium that flows in the main heat source 6 and the auxiliary heat source 12. In a configuration shown in the drawing, the flow rate sensor 27 is disposed in the heating medium pipe 4 downstream of the heating medium pump 15.
  • a room temperature thermistor 28 is an example of a room temperature sensor that detects the room temperature of a room in which the indoor-heating appliance 21 is disposed.
  • a plurality of hot water temperature sensors 30a, 30b, and 30c are mounted to the surface of the hot water tank 13 at intervals in a vertical direction.
  • the controller 100 is capable of calculating, for example, the amount of hot water and the amount of stored heat in the hot water tank 13 by detecting a temperature distribution in the vertical direction in the hot water tank 13 using the hot water temperature sensors 30a, 30b, and 30c.
  • the number of the hot water temperature sensors is three. However, the number of the hot water temperature sensors is not limited to three.
  • the controller 100 controls the operation of each of the main heat source 6, the auxiliary heat source 12, the heating medium pump 15, the water pump 16, and the switching valve 17. In the case where the heating power of the main heat source 6 is insufficient for the request of the heat use terminal, the controller 100 activates the auxiliary heat source 12.
  • the heat supply system 1 is capable of switching between a heat accumulating operation and an indoor-heating operation.
  • the switching valve 17 is controlled such that the heating medium is circulated to the indoor-heating appliance 21.
  • the switching valve 17 is controlled such that the heating medium is circulated to the hot water supply heat exchanger 14.
  • the water pump 16 is driven, and water of the hot water tank 13 is circulated to the hot water supply heat exchanger 14.
  • the hot water supply heat exchanger 14 water is heated with the heat of the heating medium. Hot water that comes out of the hot water supply heat exchanger 14 returns to the hot water tank 13, whereby the heat of the hot water is accumulated in the hot water tank 13.
  • the first unit 2 in which the main heat source 6 is housed and the second unit 3 in which the auxiliary heat source 12 and the hot water tank 13 are housed are configured to be separated from each other.
  • the main thermistor 25 is capable of detecting the temperature of the heating medium having passed through the main heat source 6 and the auxiliary heat source 12, i.e., the heating medium supply temperature.
  • the main thermistor 25 in the second unit 3, it is possible to detect the heating medium supply temperature at a position close to the heat use terminal.
  • the heating medium pump 15, the water pump 16, the auxiliary heat source 12, the hot water tank 13, and the hot water supply heat exchanger 14 are housed in the second unit 3. However, at least one of them may also be housed in the first unit 2.
  • the configuration of the heat supply system of the present invention is not limited to the configuration described above, and the heat supply system may be configured in, e.g., the following manner.
  • the first unit 2 and the second unit 3 may be integrated with each other instead of being separated from each other.
  • Hot water heated in the hot water supply heat exchanger 14 may be supplied to the hot water faucet 20 without intervention of the hot water tank 13.
  • the heating medium having passed through the first heating device and the second heating device may be circulated directly to the indoor-heating appliance 21. Water may be used as the heating medium heated by the first heating device and the second heating device, and hot water having passed through the first heating device and the second heating device may be supplied directly to the hot water tank 13 or the hot water faucet 20, for example.
  • the high-temperature side heat exchanger 8 may be divided into a portion for hot water supply and a portion for indoor-heating.
  • Fig. 2 is a block diagram showing the flow of a signal of the heat supply system 1 of Embodiment 1.
  • detection information is inputted to the controller 100 from the hot water temperature sensors 30a, 30b, and 30c, the main thermistor 25, the auxiliary thermistor 24, the low-temperature thermistor 26, the room temperature thermistor 28, and the flow rate sensor 27.
  • the controller 100 includes a main heat source operation determination section 101, a main heat source power control section 102, an auxiliary heat source operation determination section 103, a heating medium pump control section 104, and a water pump control section 105.
  • the controller 100 and a remote control 200 are connected to each other so as to be capable of interactive data communication.
  • the communication between the controller 100 and the remote control 200 may be wired communication or wireless communication.
  • the remote control 200 includes an operation section such as a switch operated by a user, and a display section that displays information on the state of the heat supply system 1 or the like.
  • the controller 100 receives information from the hot water temperature sensors 30a, 30b, and 30c, the main thermistor 25, the auxiliary thermistor 24, the low-temperature thermistor 26, the room temperature thermistor 28, the flow rate sensor 27, and the remote control 200, and controls the operations of the main heat source 6, the auxiliary heat source 12, the heating medium pump 15, the water pump 16, and the switching valve 17 based on the information.
  • Fig. 3 is a hardware configuration diagram of the controller 100 of the heat supply system 1 of Embodiment 1.
  • the controller 100 includes a processor 1000 and a memory 1001.
  • the function of the controller 100 is achieved by execution of a program stored in the memory 1001 by the processor 1000.
  • a plurality of the processors and a plurality of the memories may achieve the function of the controller 100 in cooperation with each other.
  • a user can perform, e.g., the following operations by operating the remote control 200.
  • the controller 100 determines whether the heat accumulating operation or the indoor-heating operation is necessary according to determination criteria set by the user.
  • the controller 100 may learn the daily use amount of hot water and may predict the use amount of hot water based on the learning result.
  • the controller 100 may control the heat accumulating operation such that a hot water shortage in the hot water tank 13 does not occur in accordance with the predicted use amount of hot water.
  • the controller 100 may automatically execute the indoor-heating operation based on the target value of the room temperature set by the user and the detected temperature of the room temperature thermistor 28.
  • the main heat source operation determination section 101 determines whether the operation of the main heat source 6 is necessary.
  • the main heat source power control section 102 controls the heating power of the main heat source 6 by specifying, e.g., the frequency of the compressor 7.
  • the heating medium pump control section 104 controls a circulation flow rate of the heating medium by specifying, e.g., the output or rotation speed of the heating medium pump 15.
  • the controller 100 is capable of performing feedback control such that the temperature of the heating medium detected by the main thermistor 25 or the auxiliary thermistor 24 converges to a target value. In the feedback control, the controller 100 may control the heating power of the main heat source 6 such that the heating power thereof is substantially constant by making the frequency of the compressor 7 substantially constant, and may adjust the circulation flow rate of the heating medium.
  • the water pump control section 105 controls the flow rate of water that passes through the hot water supply heat exchanger 14 by specifying, e.g., the output or rotation speed of the water pump 16.
  • the water pump control section 105 controls the water pump 16 such that the temperature of hot water accumulated in the hot water tank 13 has the target value.
  • the heating medium pump 15 during the heat accumulating operation is usually operated such that the heating medium flow rate that prioritizes energy saving is provided.
  • the heating medium flow rate that prioritizes energy saving is a flow rate that is substantially equal to the water flow rate by the water pump 16.
  • the controller 100 may control the heating medium pump 15 and the water pump 16 such that the heating medium flow rate and the water flow rate become substantially equal to each other during the heat accumulating operation.
  • the controller 100 may control the heating medium pump 15 and the water pump 16 such that the heating medium flow rate becomes equal to a value obtained by performing a predetermined correction on the water flow rate during the heat accumulating operation.
  • a predetermined correction on the water flow rate during the heat accumulating operation For example, in a system in which a CO 2 refrigerant is used, an influence of deterioration of COP (Coefficient Of Performance) resulting from an increase in the inlet temperature of the main heat source 6 is more considerable than an influence of deterioration of COP resulting from an increase in the outlet temperature of the main heat source 6 in many cases. In such cases, it is desirable to perform the above correction such that the heating medium flow rate becomes lower than the water flow rate.
  • the controller 100 may substantially fix the circulation flow rate of the heating medium, and may adjust the heating power of the main heat source 6 such that the temperature of the heating medium detected by the main thermistor 25 or the auxiliary thermistor 24 converges to the target value set by the user.
  • the controller 100 may change the target value of the heating medium supply temperature in accordance with a difference between the target value of the room temperature and the detected temperature of the room temperature thermistor 28, and control the heating power of the main heat source 6 such that the target value is achieved.
  • the rotation speed of the heating medium pump 15 may also be fixed.
  • the auxiliary heat source operation determination section 103 determines whether the operation of the auxiliary heat source 12 is necessary. For example, when a state in which the detected temperature of the main thermistor 25 or the auxiliary thermistor 24 is lower than the target value of the heating medium supply temperature continues for a time period longer than a predetermined time period, the auxiliary heat source operation determination section 103 may determine the activation of the auxiliary heat source 12. When a state in which the frequency of the compressor 7 is not less than a predetermined value and the heating medium supply temperature is lower than the target value continues for a time period longer than a predetermined time period, the auxiliary heat source operation determination section 103 may determine the activation of the auxiliary heat source 12.
  • the auxiliary heat source operation determination section 103 may determine the activation of the auxiliary heat source 12.
  • the auxiliary heat source operation determination section 103 may determine the activation of the auxiliary heat source 12.
  • Fig. 4 is a flowchart of a routine executed by the controller 100 of the heat supply system 1 of Embodiment 1.
  • the controller 100 executes the routine in Fig. 4 periodically repeatedly.
  • Step S1 in Fig. 4 the main heat source operation determination section 101 determines whether the operation of the main heat source 6 is necessary. In the case where the operation of the main heat source 6 is necessary and the main heat source 6 is not operated, the main heat source operation determination section 101 activates the main heat source 6.
  • Step S2 the controller 100 determines whether the main heat source 6 is operated. In the case where the main heat source 6 is not operated, after Step S2, the routine is ended.
  • Step S3 the controller 100 performs a process of determining whether the temperature condition of the heating medium is already stabilized. The detail of the process will be described later.
  • the routine transitions from Step S3 to Step S4.
  • Step S4 the determination result in Step S3 is checked.
  • Step S5 the controller 100 performs the feedback control on at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based on the detected temperature of the auxiliary thermistor 24.
  • Step S5 the controller 100 adjusts at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the auxiliary thermistor 24 converges to the target value of the heating medium supply temperature.
  • the operation in Step S5 is referred to as a "first operation”. After Step S5, the routine is ended.
  • Step S6 the routine transitions from Step S4 to Step S6.
  • the controller 100 performs the feedback control on at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based on the detected temperature of the main thermistor 25.
  • the controller 100 adjusts at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the main thermistor 25 converges to the target value of the heating medium supply temperature.
  • the operation in Step S6 is referred to as a "second operation”. After Step S6, the routine is ended.
  • the auxiliary heat source 12 When the main heat source 6 is activated, the auxiliary heat source 12 is not operated and is cold. For a certain time period after the activation of the main heat source 6, heat is removed from the heating medium when the heating medium passes through the auxiliary heat source 12, and the auxiliary heat source 12 is warmed with the heat of the heating medium. During this time period, the heating medium supply temperature detected by the main thermistor 25 is significantly reduced as compared with the outlet temperature of the main heat source 6 detected by the auxiliary thermistor 24. Thereafter, when the temperature of the auxiliary heat source 12 is stabilized, a difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 is reduced and stabilized. In the process in Step S3 that determines whether the temperature condition of the heating medium is stabilized, it is determined whether the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 is stabilized.
  • Step S3 it is possible to determine whether the temperature condition of the heating medium is stabilized by methods in the following examples.
  • the controller 100 determines whether the temperature condition of the heating medium is stabilized based on an elapsed time from the activation of the main heat source 6. In the case where the elapsed time from the activation of the main heat source 6 has not reached a predetermined time (e.g., one hour), the controller 100 determines that the temperature condition of the heating medium is not stabilized yet. In the case where the elapsed time from the activation of the main heat source 6 has reached the predetermined time, the controller 100 determines that the temperature condition of the heating medium is already stabilized.
  • a predetermined time e.g., one hour
  • Fig. 5 is a flowchart showing a second example of the method for determining whether the temperature condition of the heating medium is stabilized.
  • the controller 100 determines whether the temperature condition of the heating medium is stabilized based on the magnitude of a difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25.
  • Step S10 in Fig. 5 the controller 100 compares the absolute value of the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 with a predetermined reference value (e.g., 3°C). In the case where the absolute value of the temperature difference is more than the reference value, the flow transitions from Step S10 to Step S11.
  • a predetermined reference value e.g. 3°C
  • Step S11 the controller 100 determines that the temperature condition of the heating medium is not stabilized yet. In the case where the absolute value of the temperature difference is not more than the reference value, the flow transitions from Step S10 to Step S12. In Step S12, the controller 100 determines that the temperature condition of the heating medium is already stabilized.
  • This second example corresponds to a feature wherein the controller 100 determines the timing of transition from the first operation to the second operation based on the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25. According to the second example, it is possible to determine whether the temperature condition of the heating medium is stabilized with high accuracy.
  • Step S10 it may be determined whether a state in which the absolute value of the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 is not more than the reference value continues for a predetermined time period (e.g., one minute) or longer.
  • a predetermined time period e.g., one minute
  • Fig. 6 is a flowchart showing a third example of the method for determining whether the temperature condition of the heating medium is stabilized.
  • the controller 100 determines whether the temperature condition of the heating medium is stabilized based on a fluctuation range of the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25.
  • Step S15 in Fig. 6 the controller 100 determines whether a state in which the fluctuation range of the absolute value of the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 is not more than a predetermined reference value (e.g., 3°C) continues for a predetermined time period (e.g., one minute) or longer.
  • a predetermined reference value e.g. 3°C
  • Step S15 the controller 100 determines that the temperature condition of the heating medium is not stabilized yet.
  • Step S17 the controller 100 determines that the temperature condition of the heating medium is already stabilized.
  • This third example corresponds to a feature wherein the controller 100 determines the timing of transition from the first operation to the second operation based on the fluctuation range of the difference between the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25. According to the third example, it is possible to determine whether the temperature condition of the heating medium is stabilized with high accuracy.
  • Fig. 7 is a graph showing an example of the change in the detected temperature of each of the main thermistor 25 and the auxiliary thermistor 24 after the activation of the main heat source 6.
  • the example shown in Fig. 7 is the example in the case where the controller 100 controls at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based only on the detected temperature of the main thermistor 25 from immediately after the activation of the main heat source 6 without executing the routine in Fig. 4 .
  • the controller 100 corrects at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the main thermistor 25 converges to the target value of the heating medium supply temperature from immediately after the activation of the main heat source 6.
  • the example of the control in Fig. 7 does not correspond to Embodiment 1.
  • the heating medium supply temperature detected by the main thermistor 25 is significantly reduced as compared with the outlet temperature of the main heat source 6 detected by the auxiliary thermistor 24.
  • at least one of a correction that increases the heating power of the main heat source 6 and a correction that reduces the circulation flow rate of the heating medium is performed in order to cause the detected temperature of the main thermistor 25 to approach the target value.
  • An increase in the detected temperature of the main thermistor 25 tends to lag behind an increase in the outlet temperature of the main heat source 6.
  • a first reason for the lagging is that it takes time for the temperature of the auxiliary heat source 12 having a large heat capacity to increase.
  • a second reason therefor is a delay caused by transferring the heating medium from the outlet of the main heat source 6 to the position of the main thermistor 25. While the increase in the detected temperature of the main thermistor 25 lags, the heating power of the main heat source 6 is corrected to an extremely high value, or the circulation flow rate of the heating medium is corrected to an extremely low value. As a result, the outlet temperature of the main heat source 6 detected by the auxiliary thermistor 24 significantly exceeds the target value, and overshoots.
  • the heating medium supply temperature detected by the main thermistor 25 also significantly exceeds the target value, and overshoots.
  • both of the detected temperature of the auxiliary thermistor 24 and the detected temperature of the main thermistor 25 significantly exceed the target value, and overshoot.
  • the load of the main heat source 6 tends to be increased, and hence the life of the main heat source 6 may be reduced.
  • Fig. 8 is a graph showing an example of the change in the detected temperature of each of the main thermistor 25 and the auxiliary thermistor 24 after the activation of the main heat source 6.
  • the example shown in Fig. 8 is the example in the case where the controller 100 controls at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based only on the detected temperature of the auxiliary thermistor 24 without using the detected temperature of the main thermistor 25.
  • the controller 100 corrects at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the auxiliary thermistor 24 converges to the target value of the heating medium supply temperature from immediately after the activation of the main heat source 6.
  • the example of the control in Fig. 8 does not correspond to Embodiment 1.
  • the outlet temperature of the main heat source 6 detected by the auxiliary thermistor 24 converges to the target value of the heating medium supply temperature without significantly overshooting, and is stabilized.
  • the heating medium supply temperature detected by the main thermistor 25 is lower than the outlet temperature of the main heat source 6. The reason for that is that the temperature of the heating medium is reduced due to heat dissipation from the heating medium pipe 5 from the main heat source 6 to the position of the main thermistor 25.
  • the heating medium supply temperature detected by the main thermistor 25 converges to a temperature lower than the target value, and is stabilized. That is, in the example of the control in Fig. 8 , the heating medium supply temperature detected by the main thermistor 25 does not reach the target value, and undershoots.
  • Fig. 9 is a graph showing an example of the change in the detected temperature of each of the main thermistor 25 and the auxiliary thermistor 24 after the activation of the main heat source 6.
  • the example shown in Fig. 9 is the example in the case where the controller 100 performs control based on the routine shown in Fig. 4 .
  • the example of the control in Fig. 9 corresponds to Embodiment 1.
  • a time t1 in Fig. 9 is a time when the controller 100 determines that the temperature condition of the heating medium is already stabilized in Step S3 in Fig. 4 .
  • the controller 100 controls at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based on the detected temperature of the auxiliary thermistor 24.
  • the controller 100 corrects at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the auxiliary thermistor 24 converges to the target value of the heating medium supply temperature.
  • the operation during the time period before the time t1 corresponds to the first operation. In the first operation, the outlet temperature of the main heat source 6 detected by the auxiliary thermistor 24 converges to the target value of the heating medium supply temperature without significantly overshooting. In the first operation, the heating medium supply temperature detected by the main thermistor 25 converges to a temperature lower than the target value.
  • the controller 100 controls at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium based on the detected temperature of the main thermistor 25.
  • the controller 100 corrects at least one of the heating power of the main heat source 6 and the circulation flow rate of the heating medium such that the detected temperature of the main thermistor 25 converges to the target value of the heating medium supply temperature.
  • the operation after the time t1 corresponds to the second operation.
  • the detected temperature of the main thermistor 25 immediately after the start of the second operation is lower than the target value of the heating medium supply temperature.
  • the controller 100 performs at least one of the correction that increases the heating power of the main heat source 6 and the correction that reduces the circulation flow rate of the heating medium such that the detected temperature of the main thermistor 25 is increased.
  • the heating medium supply temperature detected by the main thermistor 25 converges to the target value and is stabilized without significantly overshooting.
  • the following effects are obtained. It is possible to prevent the overshooting and the undershooting of the heating medium supply temperature. It is possible to avoid an excessive increase in the outlet temperature of the main heat source 6. After the system is stabilized, it is possible to reliably increase the heating medium supply temperature to the heat use terminal to the target value.
  • Embodiment 2 of the present invention will be described with reference to Figs. 10 to 12 . Points different from the above-described embodiment will be mainly described, and the same or equivalent portions are designated by the same reference numerals and the description thereof will be omitted.
  • the equipment configuration of the heat supply system 1 of Embodiment 2 is the same as that of Embodiment 1 shown in Figs. 1 to 3 , and hence the depiction and description thereof will be omitted.
  • the auxiliary heat source operation determination section 103 determines that the auxiliary heat source 12 is activated.
  • the controller 100 performs adjustment so as to reduce the heating power of the main heat source 6 such that the overshooting of the heating medium supply temperature detected by the main thermistor 25 is prevented.
  • the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6 concurrently with the activation of the auxiliary heat source 12.
  • Fig. 10 is a flowchart of a routine executed by the controller 100 of the heat supply system 1 of Embodiment 2.
  • the controller 100 executes the routine in Fig. 10 periodically repeatedly.
  • Step S20 in Fig. 10 the controller 100 determines whether the main heat source 6 is operated. In the case where the main heat source 6 is not operated, after Step S20, the routine is ended. In the case where the main heat source 6 is operated, the routine transitions from Step S20 to Step S21.
  • the auxiliary heat source operation determination section 103 determines whether the operation of the auxiliary heat source 12 is necessary.
  • the routine transitions from Step S21 to Step S22.
  • Step S22 the controller 100 determines whether the auxiliary heat source 12 is operated. In the case where the auxiliary heat source 12 is not operated, after Step S22, the routine is ended.
  • Step S23 the controller 100 determines whether the adjustment of the heating power of the main heat source 6 in the case where the auxiliary heat source 12 is activated is completed. In the case where the adjustment of the heating power of the main heat source 6 is not completed, the routine transitions from Step S23 to Step S24. In Step S24, the controller 100 performs the adjustment of the heating power of the main heat source 6 in the case where the auxiliary heat source 12 is activated. In Step S24, the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6. In Step S23, in the case where the adjustment of the heating power of the main heat source 6 is already completed, the routine is ended.
  • Qm1 ⁇ ⁇ C ⁇ Gvw ⁇ THm ⁇ TL ⁇ Qs
  • the heating power of the main heat source 6 is adjusted to Qm1.
  • the heating power of the main heat source 6 may be adjusted so as to be reduced to the heating power obtained by multiplying the heating power of the main heat source 6 by Qm1/Qm0.
  • the frequency of the compressor 7 may be adjusted to the frequency obtained by multiplying the frequency thereof by Qm1/Qm0.
  • the detected temperature of the main thermistor 25 or the auxiliary thermistor 24 before the heating power of the main heat source 6 is reduced is 45°C
  • the detected temperature of the low-temperature thermistor 26 before the heating power of the main heat source 6 is reduced is 30°C
  • the detected flow rate of the flow rate sensor 27 is 3 liters/minute
  • the heating power of the auxiliary heat source 12 is 2 kW
  • the target value of the detected temperature of the main thermistor 25 or the auxiliary thermistor 24 is 50°C.
  • the heating power of the main heat source 6 before the heating power of the main heat source 6 is reduced is 3.14 kW
  • the heating power of the main heat source 6 required after the activation of the auxiliary heat source 12 is 2.18 kW.
  • the frequency of the compressor 7 by adjusting the frequency of the compressor 7 to the frequency obtained by multiplying the frequency pf the compressor 7 by 0.69, it is possible to cause the heating medium supply temperature after the activation of the auxiliary heat source 12 to approach the target value 50°C with high accuracy.
  • Fig. 11 is a graph showing an example of the change in the temperatures in the vicinity of the upstream side and the downstream side of the auxiliary heat source 12 in the case where the auxiliary heat source 12 is activated in a state in which the main heat source 6 is operated and the auxiliary heat source 12 is not operated.
  • the example shown in Fig. 11 is the example in the case where it is assumed that the controller 100 does not execute the process in Step S24 in Fig. 10 . That is, the example shown in Fig. 11 is the example in the case where it is assumed that the controller 100 does not perform the adjustment of the heating power of the main heat source 6 resulting from the activation of the auxiliary heat source 12.
  • the example in Fig. 11 does not correspond to Embodiment 2.
  • the temperature in the vicinity of the downstream side of the auxiliary heat source 12 in Fig. 11 corresponds to the heating medium supply temperature detected by the main thermistor 25.
  • a time t2 in Fig. 11 is a time when the auxiliary heat source 12 is activated. Before the time t2, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 converges to a temperature lower than the target value. Because of this, it is determined that the heating power of the main heat source 6 is insufficient, and the auxiliary heat source 12 is activated. When the auxiliary heat source 12 is activated at the time t2, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 sharply increases, significantly exceeds the target value, and overshoots.
  • the controller 100 detects the overshooting with the main thermistor 25. As a result, by the feedback control of the controller 100, the heating power of the main heat source 6 is corrected so as to be reduced.
  • a time t3 in Fig. 11 is a time when the reduction of the temperature in the vicinity of the upstream side of the auxiliary heat source 12 is started by the correction. With the reduction of the temperature in the vicinity of the upstream side of the auxiliary heat source 12, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 is reduced. Thereafter, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 converges to the target value. In the example shown in Fig.
  • the heating power of the main heat source 6 is not corrected so as to be reduced before the overshooting of the temperature in the vicinity of the downstream side of the auxiliary heat source 12. Accordingly, it is not possible to prevent the overshooting of the temperature in the vicinity of the downstream side of the auxiliary heat source 12, i.e., the heating medium supply temperature.
  • Fig. 12 is a graph showing an example of the change in the temperatures in the vicinity of the downstream side and the upstream side of the auxiliary heat source 12 in the case where the auxiliary heat source 12 is activated in the state in which the main heat source 6 is operated and the auxiliary heat source 12 is not operated.
  • the example of the control in Fig. 12 is the example in the case where the controller 100 executes the process in Step S24 in Fig. 10 .
  • the example of the control in Fig. 12 corresponds to Embodiment 2.
  • a time t4 in Fig. 12 is a time when the auxiliary heat source 12 is activated.
  • the temperature in the vicinity of the downstream side of the auxiliary heat source 12 converges to a temperature lower than the target value. Because of this, it is determined that the heating power of the main heat source 6 is insufficient, and the auxiliary heat source 12 is activated.
  • the adjustment that reduces the heating power of the main heat source 6 is performed. With this, soon after the activation of the auxiliary heat source 12, the temperature in the vicinity of the upstream side of the auxiliary heat source 12 is reduced. As a result, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 is prevented from significantly exceeding the target value. That is, the overshooting of the heating medium supply temperature is prevented.
  • the circulation flow rate of the heating medium is set to be low for the purpose of obtaining high COP.
  • the heating medium supply temperature tends to overshoot when the auxiliary heat source 12 is activated. According to Embodiment 2, even in the system, it is possible to reliably prevent the overshooting of the heating medium supply temperature when the auxiliary heat source 12 is activated.
  • Embodiment 3 of the present invention will be described with reference to Figs. 13 to 15 . Points different from the embodiments described above will be mainly described, and the same or equivalent portions are designated by the same reference numerals and the description thereof will be omitted.
  • the equipment configuration of the heat supply system 1 of Embodiment 3 is the same as that of Embodiment 1 shown in Figs. 1 to 3 , and hence the depiction and description thereof will be omitted.
  • the auxiliary heat source operation determination section 103 determines that the auxiliary heat source 12 is activated.
  • the controller 100 concurrently with the activation of the auxiliary heat source 12, the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6.
  • the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6 before the activation of the auxiliary heat source 12.
  • the controller 100 in the case where it is determined that the auxiliary heat source 12 is activated during the operation of the main heat source 6, after the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6, the controller 100 temporarily halts the activation of the auxiliary heat source 12 until the effect reaches the position of the auxiliary heat source 12.
  • the controller 100 activates the auxiliary heat source 12 after the effect of the adjustment of the heating power of the main heat source 6 reaches the position of the auxiliary heat source 12. According to the present embodiment, even in the system in which the length of the flow path from the main heat source 6 to the auxiliary heat source 12 is large, it is possible to reliably prevent the overshooting of the heating medium supply temperature when the auxiliary heat source 12 is activated.
  • Fig. 13 is a flowchart of a routine executed by the controller 100 of the heat supply system 1 of Embodiment 3.
  • the controller 100 executes the routine in Fig. 13 periodically repeatedly.
  • Step S30 in Fig. 13 the controller 100 determines whether the main heat source 6 is operated. In the case where the main heat source 6 is not operated, after Step S30, the routine is ended. In the case where the main heat source 6 is operated, the routine transitions from Step S30 to Step S31.
  • the auxiliary heat source operation determination section 103 determines whether the operation of the auxiliary heat source 12 is necessary.
  • the routine transitions from Step S31 to Step S32.
  • Step S32 the controller 100 determines whether the operation of the auxiliary heat source 12 is determined. In the case where the auxiliary heat source 12 is not operated, after Step S32, the routine is ended.
  • Step S33 the controller 100 determines whether the adjustment of the heating power of the main heat source 6 before the auxiliary heat source 12 is activated is completed. In the case where the adjustment of the heating power of the main heat source 6 is not completed, the routine transitions from Step S33 to Step S34.
  • Step S34 the controller 100 performs the adjustment of the heating power of the main heat source 6 before the auxiliary heat source 12 is activated.
  • Step S34 the controller 100 performs the adjustment so as to reduce the heating power of the main heat source 6.
  • the adjustment method in Step S34 is the same as the adjustment method in Step S24 in Embodiment 2 described above.
  • the routine transitions from Step S34 to Step S35.
  • Step S35 the controller 100 temporarily halts the activation of the auxiliary heat source 12. After Step S35, the routine is ended.
  • Step S33 in the case where the adjustment of the heating power of the main heat source 6 is already completed, the routine transitions to Step S36.
  • Step S36 the controller 100 determines whether the effect of the adjustment of the heating power of the main heat source 6 has reached the position of the auxiliary heat source 12. In the case where it is determined that the effect of the adjustment of the heating power of the main heat source 6 has not reached the position of the auxiliary heat source 12 yet, the routine transitions from Step S36 to Step S37.
  • Step S37 the controller 100 temporarily halts the activation of the auxiliary heat source 12. After Step S37, the routine is ended.
  • Step S36 in the case where it is determined that the effect of the adjustment of the heating power of the main heat source 6 has reached the position of the auxiliary heat source 12, the routine transitions from Step S36 to Step S38.
  • Step S38 the controller 100 activates the auxiliary heat source 12.
  • Step S38 in the case where the auxiliary heat source 12 is already activated, the controller 100 continues the operation of the auxiliary heat source 12. After Step S38, the routine is ended.
  • Fig. 14 is a graph showing an example of the change in the temperatures in the vicinity of the downstream side and the upstream side of the auxiliary heat source 12 in the case where the auxiliary heat source 12 is activated in the state in which the main heat source 6 is operated and the auxiliary heat source 12 is not operated.
  • the example shown in Fig. 14 is the example in the case where it is assumed that the adjustment of the heating power of the main heat source 6 is performed concurrently with the activation of the auxiliary heat source 12 in the system in which the length of the flow path from the main heat source 6 to the auxiliary heat source 12 is large.
  • the temperature in the vicinity of the downstream side of the auxiliary heat source 12 in Fig. 14 corresponds to the heating medium supply temperature detected by the main thermistor 25.
  • a time t5 in Fig. 14 is a time when the auxiliary heat source 12 is activated and the adjustment that reduces the heating power of the main heat source 6 is performed. Before the time t5, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 converges to a temperature lower than the target value. Because of this, it is determined that the heating power of the main heat source 6 is insufficient, and the auxiliary heat source 12 is activated.
  • a time t6 in Fig. 14 is a time when the effect of the adjustment of the heating power of the main heat source 6 reaches the position of the auxiliary heat source 12.
  • the time t6 is the time when the temperature in the vicinity of the upstream side of the auxiliary heat source 12 starts its reduction. Thereafter, with the reduction of the temperature in the vicinity of the upstream side of the auxiliary heat source 12, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 is reduced.
  • Fig. 15 is a graph showing an example of the change in the temperatures in the vicinity of the downstream side and the upstream side of the auxiliary heat source 12 in the case where the auxiliary heat source 12 is activated in the state in which the main heat source 6 is operated and the auxiliary heat source 12 is not operated.
  • the example of the control in Fig. 15 is the example in the case where the controller 100 executes the routine in Fig. 13 .
  • the example of the control in Fig. 15 corresponds to Embodiment 3.
  • a time t7 in Fig. 15 is a time when the activation of the auxiliary heat source 12 is determined. Before the time t7, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 converges to a temperature lower than the target value. Because of this, it is determined that the heating power of the main heat source 6 is insufficient, and the activation of the auxiliary heat source 12 is determined. When the activation of the auxiliary heat source 12 is determined, with the process in Step S34 in Fig. 13 , the adjustment that reduces the heating power of the main heat source 6 is performed. With this, the temperature in the vicinity of the downstream side of the main heat source 6 is reduced. A time t8 in Fig.
  • the time t8 is the time when the temperature in the vicinity of the upstream side of the auxiliary heat source 12 starts its reduction.
  • the auxiliary heat source 12 is activated.
  • the reduction of the temperature in the vicinity of the upstream side of the auxiliary heat source 12 is already started. Accordingly, after the activation of the auxiliary heat source 12, the temperature in the vicinity of the downstream side of the auxiliary heat source 12 is prevented from significantly exceeding the target value. That is, the overshooting of the heating medium supply temperature is prevented.
  • the circulation flow rate of the heating medium is set to be low for the purpose of obtaining high COP.
  • the heating medium supply temperature tends to overshoot when the auxiliary heat source 12 is activated. According to Embodiment 3, even in the system, it is possible to reliably prevent the overshooting of the heating medium supply temperature when the auxiliary heat source 12 is activated.
  • Step S36 Examples of a method according to which the controller 100 determines whether the effect of the adjustment of the heating power of the main heat source 6 has reached the position of the auxiliary heat source 12 in Step S36 will be described below.

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Claims (5)

  1. Système d'alimentation de chaleur (1) comprenant :
    une pompe (15) configurée pour pomper un fluide caloporteur ;
    un premier dispositif de chauffage (6) configuré pour chauffer le fluide caloporteur ;
    un second dispositif de chauffage (12) configuré pour chauffer le fluide caloporteur en aval du premier dispositif de chauffage (6) ; et
    un organe de commande (100) ; caractérisé en ce que l'organe de commande (100) est configuré pour réduire une puissance calorifique du premier dispositif de chauffage (6) simultanément avec ou avant l'activation du second dispositif de chauffage (12), dans un cas dans lequel le second dispositif de chauffage (12) est activé dans un état dans lequel le premier dispositif de chauffage (6) est actionné sans actionner le second dispositif de chauffage (12).
  2. Système d'alimentation de chaleur (1) selon la revendication 1, dans lequel :
    l'organe de commande (100) est configuré pour activer le second dispositif de chauffage (12) sur la base d'un temps écoulé après que la puissance calorifique du premier dispositif de chauffage (6) a été réduite, ou en réponse à un changement de température du fluide caloporteur en aval du premier dispositif de chauffage (6) après que la puissance calorifique du premier dispositif de chauffage (6) a été réduite.
  3. Système d'alimentation de chaleur (1) selon la revendication 1 ou 2, dans lequel :
    l'organe de commande (100) est configuré pour modifier une quantité de la réduction de la puissance calorifique du premier dispositif de chauffage (6) selon la température du fluide caloporteur en amont du premier dispositif de chauffage (6) et la température du fluide caloporteur en aval du premier dispositif de chauffage (6) avant que la puissance calorifique du premier dispositif de chauffage (6) ne soit réduite, un débit du fluide caloporteur, une valeur cible de la température du fluide caloporteur en aval du second dispositif de chauffage (12) et une puissance calorifique du second dispositif de chauffage (12).
  4. Système d'alimentation de chaleur (1) selon l'une quelconque des revendications 1 à 3, comprenant en outre :
    une première unité (2) dans laquelle le premier dispositif de chauffage (6) est logé ;
    une seconde unité (3) dans laquelle le second dispositif de chauffage (12) est logé ; et
    un tuyau de fluide caloporteur (4, 5) qui raccorde la première unité (2) et la seconde unité (3).
  5. Système d'alimentation de chaleur (1) selon l'une quelconque des revendications 1 à 4, dans lequel :
    le premier dispositif de chauffage (6) comprend une pompe à chaleur qui utilise le dioxyde de carbone en tant que réfrigérant.
EP15881947.4A 2015-02-12 2015-02-12 Système d'alimentation en chaleur Active EP3258185B1 (fr)

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DE102021102438A1 (de) 2021-02-03 2022-08-04 Viessmann Climate Solutions Se Wärmepumpenanlage und Verfahren zum Betrieb einer Wärmepumpenanlage
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JP6399113B2 (ja) 2018-10-03

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