WO2022123626A1 - 給湯暖房システム - Google Patents
給湯暖房システム Download PDFInfo
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- WO2022123626A1 WO2022123626A1 PCT/JP2020/045476 JP2020045476W WO2022123626A1 WO 2022123626 A1 WO2022123626 A1 WO 2022123626A1 JP 2020045476 W JP2020045476 W JP 2020045476W WO 2022123626 A1 WO2022123626 A1 WO 2022123626A1
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- heat
- heat source
- temperature
- pump
- controller
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000012530 fluid Substances 0.000 claims abstract description 60
- 238000004891 communication Methods 0.000 description 23
- 238000010586 diagram Methods 0.000 description 14
- 238000005057 refrigeration Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012790 confirmation Methods 0.000 description 6
- 101100208381 Caenorhabditis elegans tth-1 gene Proteins 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- 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
- F24D3/18—Hot-water central heating 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
- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a 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
- F24D3/00—Hot-water central heating systems
-
- 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
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0207—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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
-
- 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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- This disclosure relates to a hot water supply / heating system equipped with a heat source machine that supplies heat to load-side equipment.
- the primary side circulation circuit includes a heat source that functions as a heating unit, a first pump that circulates a heat medium in the primary side circulation circuit, and a first temperature detection unit that detects the temperature of the heat medium.
- the secondary side circulation circuit includes a heat storage tank that serves as a load side device, a second pump that circulates water in the secondary side circulation circuit, and a second temperature detection unit that detects the temperature of water. The heat exchanger exchanges heat between the heat medium flowing through the primary side circulation circuit and the water flowing through the secondary side circulation circuit.
- the hot water supply system disclosed in Patent Document 1 raises the temperature of the heat medium of the primary side circulation circuit when the temperature of the hot water supplied from the secondary side circulation circuit to the heat storage tank is lower than the target temperature. Increase the frequency of the compressor of the heat source or increase the flow rate of the heat medium of the primary circulation circuit.
- the flow rate of the heat medium flowing through the primary side circulation circuit and the flow rate of hot water flowing through the secondary side circulation circuit are the same in order to suppress deterioration of the coefficient of performance of the heat source.
- the first pump and the second pump are controlled in such a manner.
- the present disclosure has been made to solve the above-mentioned problems, and provides a hot water supply / heating system capable of raising the temperature of the fluid in the secondary circuit even when the heating capacity of the primary circuit reaches the limit. It is something to do.
- the hot water supply and heating system includes a heat source machine that generates heat, a heat medium heat exchanger that relays the supply of the heat from the heat source machine to the load side device, and the heat source machine and the heat medium heat exchanger.
- the temperature of the primary side fluid which is the temperature of the second pump that circulates the second heat medium between the device and the heat source machine, and the temperature of the first heat medium that flows out from the heat source machine via the primary side circuit is detected.
- a first temperature sensor a heat source machine controller that controls a heating capacity that is the amount of heat generated in the heat source machine, a pump controller that controls the second pump based on control information received from the heat source machine controller, and a pump controller.
- the heat source machine controller has a primary side determination means for determining whether or not the primary side fluid temperature detected by the first temperature sensor is lower than the primary side target temperature, and the primary side.
- the ability determination means for determining whether or not the heating capacity of the heat source machine is the same as a predetermined upper limit value.
- the heating capacity of the heat source machine is determined to be the same as the upper limit value by the capacity determining means, the upper limit is reached, which is information that the heating capacity of the heat source machine has reached the upper limit value as the control information. It has a notification means for transmitting information to the pump controller, and the pump controller has a pump control means for lowering the operating frequency of the second pump when the upper limit arrival information is received from the heat source machine controller. be.
- the pump controller can raise the temperature of the fluid in the secondary circuit by controlling the second pump to reduce the flow rate of the fluid in the secondary circuit.
- FIG. It is a figure which shows one configuration example of the hot water supply heating system which concerns on Embodiment 1.
- FIG. It is a figure which shows one configuration example of the heat source machine shown in FIG. It is a figure which shows one configuration example of the inverter shown in FIG. It is a functional block diagram which shows one configuration example of the heat source machine controller shown in FIG. It is a functional block diagram which shows one configuration example of the pump controller shown in FIG. It is a hardware configuration diagram which shows one configuration example of the heat source machine controller shown in FIG. It is a hardware configuration diagram which shows another configuration example of the heat source machine controller shown in FIG. It is a figure which shows the configuration example of the hot water supply heating system of a comparative example.
- FIG. 1 is a diagram showing a configuration example of a hot water supply / heating system according to the first embodiment.
- the hot water supply / heating system 100 includes a heat source machine 1, a heat medium heat exchanger 7, a primary side circuit 12 connecting the heat source machine 1 and the heat medium heat exchanger 7, and heat medium heat. It has a secondary circuit 13 for connecting the exchanger 7 and the load side device 4, and a pump controller 11.
- the load-side device 4 is, for example, a radiator for heating or a hot water storage tank.
- the first pump 2 that circulates the first heat medium in the primary side circuit 12 and the primary side fluid temperature Tw1 that is the temperature of the first heat medium flowing out from the heat source machine 1 are detected.
- a first temperature sensor 3 is provided.
- the first heat medium is water will be described, but an antifreeze solution such as brine may be used.
- the secondary side circuit 13 includes a second pump 5 that circulates the second heat medium through the secondary side circuit 13, a second temperature sensor 6 that detects the temperature of the second heat medium that circulates through the secondary side circuit 13.
- a third temperature sensor 10 is provided. In the first embodiment, the case where the second heat medium is water will be described.
- the second temperature sensor 6 detects the secondary side fluid inlet temperature Tw2in, which is the temperature of the second heat medium flowing from the heat medium heat exchanger 7 to the load side device 4 via the secondary side circuit 13.
- the third temperature sensor 10 detects the secondary side fluid outlet temperature Tw2out, which is the temperature of the second heat medium flowing out from the load side device 4 to the secondary side circuit 13.
- the heat medium heat exchanger 7 is a device that relays the supply of heat from the heat source machine 1 to the load side device 4.
- the heat medium heat exchanger 7 exchanges heat between the first heat medium circulating in the primary side circuit 12 and the second heat medium circulating in the secondary side circuit 13.
- the pump controller 11 is connected to the communication device 8, the first pump 2, and the second pump 5 provided in the heat source machine 1 via the signal line 51.
- the pump controller 11 is connected to the second temperature sensor 6 and the third temperature sensor 10 via a signal line (not shown).
- the second pump 5 has an inverter 9 that adjusts the operating frequency of the motor (not shown). In the first embodiment, for convenience of explanation, the inverter 9 is shown in the figure as a configuration different from that of the second pump 5.
- FIG. 2 is a diagram showing a configuration example of the heat source machine shown in FIG.
- the heat source machine 1 includes a compressor 21, a heat source side heat exchanger 23, an expansion valve 24, a fan 25, a load side heat exchanger 26, a heat source machine controller 30, and a communication device. Has 8 and.
- the compressor 21, the heat source side heat exchanger 23, the expansion valve 24, and the load side heat exchanger 26 are connected by a refrigerant pipe 27 to form a refrigerant circuit 20.
- the heat source controller 30 is connected to the compressor 21, the expansion valve 24, the communication device 8, and the first temperature sensor 3 via a signal line (not shown).
- the compressor 21 sucks the refrigerant from the refrigerant pipe 27, compresses the sucked refrigerant, and discharges it to the refrigerant pipe 27.
- the compressor 21 is, for example, an inverter compressor whose capacity is changed by controlling the operating frequency Fc.
- the load side heat exchanger 26 is a heat exchanger that functions as a condenser. In the load side heat exchanger 26, the refrigerant discharged from the compressor 21 and the first heat medium circulating in the primary side circuit 12 exchange heat.
- the expansion valve 24 decompresses and expands the refrigerant flowing from the load side heat exchanger 26.
- the expansion valve 24 is, for example, an electric expansion valve capable of adjusting the flow rate of the refrigerant.
- the fan 25 rotates to supply air to the heat source side heat exchanger 23.
- the fan 25 is, for example, a propeller fan.
- the heat source side heat exchanger 23 is a heat exchanger that functions as an evaporator. In the heat source side heat exchanger 23, the low-temperature low-pressure refrigerant flowing out of the expansion valve 24 and the air supplied by the fan 25 exchange heat.
- FIG. 4 is a functional block diagram showing a configuration example of the heat source machine controller shown in FIG. 2.
- the heat source machine controller 30 is a controller that controls the heating capacity, which is the amount of heat generated by the heat source machine 1.
- the heat source controller 30 is, for example, a microcomputer.
- the heat source machine controller 30 has a primary side determination unit 31, a capacity determination unit 32, a refrigeration cycle control unit 33, and a notification unit 34.
- the primary side determination means 31 determines whether or not the primary side fluid temperature Tw1 detected by the first temperature sensor 3 is lower than the primary side target temperature Tw1s, and the determination result is determined by the capacity determination means 32 and the refrigeration cycle control. It is transmitted to the means 33.
- the capacity determination means 32 determines that the primary side fluid temperature Tw1 is lower than the primary side target temperature Tw1s by the primary side determination means 31, the heating capacity of the heat source machine 1 is the same as a predetermined upper limit value. Whether or not it is determined, and the determination result is transmitted to the notification means 34.
- the capacity determining means 32 acquires information on the operating frequency Fc of the compressor 21 from the refrigerating cycle control means 33, and determines whether or not the operating frequency Fc is the same as the maximum frequency Fmax to heat the heat source machine 1. Determine if the ability is the same as the upper limit.
- the refrigeration cycle control means 33 acquires the primary side fluid temperature Tw1 detected by the first temperature sensor 3 via the primary side determination means 31 and the capacity determination means 32. Then, the refrigeration cycle control means 33 controls the opening degree of the expansion valve 24 and the operating frequency Fc of the compressor 21 so that the primary side fluid temperature Tw1 coincides with the primary side target temperature Tw1s within a predetermined range. ..
- the refrigerating cycle control means 33 determines that the primary side fluid temperature Tw1 is lower than the primary side target temperature Tw1s and the capacity determining means 32 determines that the heating capacity of the heat source machine 1 is lower than the upper limit value, the heat source machine 1 Increase the heating capacity. Specifically, the refrigeration cycle control means 33 makes the operating frequency Fc of the compressor 21 larger than the currently set value.
- the notification means 34 is information that the heating capacity of the heat source machine 1 has reached the upper limit value as control information.
- the arrival information is transmitted to the pump controller 11 via the communication device 8. Further, the notification means 34 may be set in advance as to whether or not to transmit the upper limit arrival information to the pump controller 11 when the heating capacity of the heat source machine 1 has reached the upper limit value.
- two types of patterns can be considered as setting patterns.
- the setting pattern two types of patterns 1 and 2 will be described.
- Pattern 1 is a pattern in which it is possible to set whether or not to transmit the upper limit arrival information to the pump controller 11 when the heating capacity of the heat source machine 1 has reached the upper limit value, depending on the presence or absence of a confirmation command.
- the notification means 34 transmits the upper limit arrival information to the pump controller 11 when the heating capacity of the heat source machine 1 has reached the upper limit value.
- the notification means 34 does not transmit the upper limit arrival information to the pump controller 11 even if the heating capacity of the heat source machine 1 has reached the upper limit value.
- the pattern 2 is a pattern in which the upper limit arrival information is always transmitted to the pump controller 11 when the heating capacity of the heat source machine 1 has reached the upper limit value.
- the pattern 1 or 2 is set in the notification means 34 in advance by the user or the installer of the hot water supply / heating system 100.
- the presence / absence of the confirmation command is set in the notification means 34 in advance by the user or the installer of the hot water supply / heating system 100.
- FIG. 3 is a diagram showing a configuration example of the inverter shown in FIG.
- the inverter 9 includes a power conversion circuit 56 that converts an AC voltage supplied from an AC power supply into a DC voltage, and an inverter circuit 57 that converts the DC voltage into a three-phase AC and supplies power to the motor 55 of the second pump 5.
- the inverter circuit 57 has, for example, six transistor elements. Each transistor element performs an on operation and an off operation according to an operation signal input from the pump controller 11.
- FIG. 5 is a functional block diagram showing a configuration example of the pump controller shown in FIG.
- the pump controller 11 is a controller that controls the first pump 2 and the second pump 5 based on the control information received from the heat source machine controller 30.
- the pump controller 11 is, for example, a microcomputer.
- the pump controller 11 has a secondary side determination means 41 and a pump control means 42.
- the secondary side determination means 41 receives the upper limit arrival information from the heat source machine controller 30, it determines whether or not the heat load generated by the load side device 4 is low based on the secondary side fluid inlet temperature Tw2in, and determines the determination result. It is transmitted to the pump control means 42. For example, when the secondary side determination means 41 calculates the temperature difference ⁇ Tw2d between the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s and the temperature difference ⁇ Tw2d is equal to or less than a predetermined first threshold value Tth1. Judge that the heat load is low.
- the secondary side target temperature Tw2s is set by the user who uses the load side device 4.
- the secondary side determination means 41 may determine the heat load of the load side device 4 as follows.
- the secondary side determination means 41 calculates the temperature difference ⁇ Tw2 between the secondary side fluid inlet temperature Tw2in and the secondary side fluid outlet temperature Tw2out. Then, the secondary side determination means 41 determines that the heat load is low when the temperature difference ⁇ Tw2 is equal to or less than the predetermined second threshold value Tth2.
- the pump control means 42 controls the start and stop of the first pump 2 and the second pump 5. Further, when the secondary side determination means 41 determines that the heat load of the load side device 4 is low, the pump control means 42 lowers the operating frequency of the second pump 5. Specifically, the pump control means 42 transmits an operation signal for reducing the current supplied to the motor 55 shown in FIG. 3 to the inverter circuit 57.
- FIG. 6 is a hardware configuration diagram showing a configuration example of the heat source machine controller shown in FIG.
- the heat source controller 30 shown in FIG. 4 is composed of a processing circuit 61 as shown in FIG.
- the primary side determination means 31, the capacity determination means 32, the refrigeration cycle control means 33, and the notification means 34 shown in FIG. 4 are realized by the processing circuit 61.
- the processing circuit 61 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate). Array), or a combination of these.
- the functions of the primary side determination means 31, the capacity determination means 32, the refrigeration cycle control means 33, and the notification means 34 may be realized by the processing circuit 61, and the functions of the means may be realized by one processing circuit 61. You may.
- FIG. 7 is a hardware configuration diagram showing another configuration example of the heat source machine controller shown in FIG.
- the heat source controller 30 shown in FIG. 4 is composed of a processor 71 such as a CPU (Central Processing Unit) and a memory 72 as shown in FIG. Will be done.
- a processor 71 such as a CPU (Central Processing Unit)
- a memory 72 as shown in FIG. Will be done.
- Each function of the primary side determination means 31, the capacity determination means 32, the refrigeration cycle control means 33, and the notification means 34 is realized by the processor 71 and the memory 72.
- the processor 71 and the memory 72 are connected via the bus 73.
- the functions of the primary side determination means 31, the capacity determination means 32, the refrigeration cycle control means 33, and the notification means 34 are realized by software, firmware, or a combination of software and firmware. ..
- the software and firmware are written as a program and stored in the memory 72.
- the processor 71 realizes the function of each means by reading and executing the program stored in the memory 72.
- a non-volatile semiconductor memory such as a ROM (Read Only Memory), a flash memory, an EPROM (Erasable and Programmable ROM), and an EPROM (Electrically Erasable and Projectable ROM) is used.
- a volatile semiconductor memory of RAM Random Access Memory
- a detachable recording medium such as a magnetic disk, a flexible disk, an optical disk, a CD (Compact Disc), an MD (Mini Disc), and a DVD (Digital Versaille Disc) may be used.
- the hardware configuration of the pump controller 11 may also be the configuration described with reference to FIG. 6 or the configuration described with reference to FIG. 7. Further, in the first embodiment, the pump controller 11 is connected to the communication device 8, the first pump 2, the second pump 5, the second temperature sensor 6, and the third temperature sensor 10 via a signal line. As described in the above, the communication connection means is not limited to wired, and may be wireless. The case where the heat source controller 30 is connected to the compressor 21, the expansion valve 24, the communication device 8, and the first temperature sensor 3 via a signal line has been described, but the communication connection means is not limited to wired but wireless. You may.
- the communication between the pump controller 11 and the communication device 8 may be performed according to a predetermined communication protocol or communication standard, or may be merely on and off signals.
- the communication protocol is, for example, Modbus®.
- the communication standard is, for example, Wi-Fi®.
- the notification means 34 transmits an on signal to the pump controller 11 via the communication device 8, and when the heating capacity of the heat source machine 1 is lower than the upper limit value, the notification means 34 transmits the on signal to the pump controller 11.
- the signal transmitted to the pump controller 11 via the communication device 8 is maintained as an off signal.
- FIG. 8 is a diagram showing a configuration example of a hot water supply / heating system of a comparative example.
- the hot water supply / heating system 200 includes a heat source machine 111, a primary side circuit 121, and a secondary side circuit 131.
- the primary side circuit 121 is provided with the first pump 152
- the secondary side circuit 131 is provided with the second pump 155.
- the hot water supply / heating system 200 has a configuration in which the operating frequency of the second pump 155 cannot be adjusted.
- the fluid of each circuit of the primary side circuit 121 and the secondary side circuit 131 is water will be described.
- the target temperature of the secondary circuit 131 is determined by the heat load generated by the load side device 4.
- the heating for raising the water flowing through the secondary side circuit 131 to the target temperature is the heat exchange between the water circulating in the primary side circuit 121 and the water flowing through the secondary side circuit 131 in the heat medium heat exchanger 7. It is done by.
- the heat source machine controller (not shown) raises the target temperature of the primary circuit 121 and adjusts the temperature with the heating unit of the primary circuit 121. do. In this way, when the target temperature of the secondary side circuit 131 rises, the hot water supply / heating system 200 adjusts the temperature within the range of the heating capacity of the heat source machine 111 of the primary side circuit 121.
- Q is the calorific value [kW]
- Gw is the flow rate of water [t / h]
- Cp is the specific heat of water [kj / kg].
- ⁇ Tw is the temperature difference of water (outlet water temperature To-inlet water temperature Ti) [° C.].
- the left side of the equation (1) is the primary circuit 121
- the right side of the equation (1) is the secondary circuit 131.
- the heating capacity of the heat source machine 111 of the primary circuit 121 reaches the limit
- the amount of heat Q on the left side is constant
- the Cp on the right side is constant due to physical characteristics.
- the temperature difference ⁇ Tw becomes large. That is, in order to raise the water temperature of the secondary circuit 131, the flow rate Gw of the secondary circuit 131 may be reduced.
- the hot water supply / heating system 200 of the comparative example has a configuration in which the operating frequency of the second pump 155 cannot be adjusted, the flow rate of the secondary side circuit 131 cannot be controlled, and the flow rate of the secondary side circuit 131 becomes constant.
- FIG. 9 shows a process executed by the heat source machine controller 30.
- FIG. 10 shows a process executed by the pump controller 11.
- the primary side determination means 31 acquires information on the primary side fluid temperature Tw1 from the first temperature sensor 3 at a predetermined cycle (step S101). The primary side determination means 31 determines whether or not the primary side fluid temperature Tw1 is lower than the primary side target temperature Tw1s (step S102). When the determination in step S102 is No, the primary side determination means 31 determines whether or not the primary side fluid temperature Tw1 is higher than the primary side target temperature Tw1s (step S103).
- step S103 when the primary side fluid temperature Tw1 is the same as the primary side target temperature Tw1s, the refrigeration cycle control means 33 maintains the heating capacity (step S104). As a result of the determination in step S103, when the primary side fluid temperature Tw1 is higher than the primary side target temperature Tw1s, the refrigeration cycle control means 33 reduces the heating capacity (step S105).
- step S102 when the primary side fluid temperature Tw1 is lower than the primary side target temperature Tw1s, the capacity determining means 32 determines whether or not the heating capacity is the same as the upper limit value (step S106). .. When the heating capacity is lower than the upper limit, the refrigeration cycle control means 33 increases the heating capacity (step S107). As a result of the determination in step S106, when the heating capacity is the same as the upper limit value, the notification means 34 determines whether or not the pattern 1 is set (step S108).
- the notification means 34 determines whether or not there is a confirmation command for the heating capacity (step S109). When there is a confirmation command of the heating capacity, the notification means 34 transmits the upper limit arrival information to the pump controller 11 (step S110). As a result of the determination in step S109, if there is a command for confirming the heating capacity, the notification means 34 instructs the primary side determination means 31 to perform the determination process in step S101. On the other hand, if the pattern 1 is not set as a result of the determination in step S108, since the pattern 2 is set, the notification means 34 transmits the upper limit arrival information to the pump controller 11 (step S110).
- the secondary side determination means 41 of the pump controller 11 receives the upper limit arrival information from the heat source controller 30, as shown in FIG. 10, the secondary side determination means 41 acquires the information of the secondary side fluid inlet temperature Tw2in from the second temperature sensor 6 (as shown in FIG. 10). Step S111).
- the secondary side determination means 41 determines whether or not the heat load generated by the load side device 4 is low based on the secondary side fluid inlet temperature Tw2in. Specifically, the secondary side determination means 41 calculates the temperature difference ⁇ Tw2d between the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s. Subsequently, the secondary side determination means 41 determines whether or not the temperature difference ⁇ Tw2d is equal to or less than the predetermined first threshold value Tth1 (step S112).
- step S112 when the temperature difference ⁇ Tw2d is larger than the first threshold value Tth1, the secondary side determination means 41 instructs the primary side determination means 31 of the heat source controller 30 to perform the determination process in step S101.
- the pump control means 42 controls the inverter 9 to lower the operating frequency of the second pump 5 (step S113).
- the secondary side determination means 41 determines whether or not the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s match (step S114).
- the secondary side determination means 41 When the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s do not match, the secondary side determination means 41 returns to the process of step S111. On the other hand, as a result of the determination in step S114, when the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s match, the secondary side determination means 41 steps to the primary side determination means 31 of the heat source controller 30. Instruct the determination process of S101.
- the pump controller 11 determines whether or not the heat source machine 1 which is the heating unit of the primary circuit 12 has reached the capacity limit. Can be confirmed. Then, the pump controller 11 adjusts the flow rate of the fluid in the secondary circuit 13 when the heat source machine 1 has reached the capacity limit but the temperature of the fluid in the secondary circuit 13 has not reached the target temperature. Therefore, the temperature of the fluid in the secondary circuit 13 can reach the target temperature. In this case, since the heat load of the load-side device 4 is low, the change in the flow rate of the secondary-side circuit 13 is not noticed by the user, and the temperature of the fluid in the secondary-side circuit 13 is raised to the secondary-side target temperature Tw2s. be able to.
- the secondary side determination means 41 compares the temperature difference ⁇ Tw2d between the secondary side fluid inlet temperature Tw2in and the secondary side target temperature Tw2s with the first threshold value Tth1 for determination. Although it was explained in the case of doing, it is not limited to this case.
- the secondary side determination means 41 compares the temperature difference ⁇ Tw2 between the secondary side fluid inlet temperature Tw2in and the secondary side fluid outlet temperature Tw2out with the second threshold value Tth2, and determines the heat load of the load side device 4. May be good.
- the pump control means 42 receives the upper limit arrival information from the heat source machine controller 30 via the secondary side determination means 41, the pump control means 42 lowers the operating frequency of the second pump 5 regardless of the determination result of the secondary side determination means 41. May be good. This is because even if the flow rate of the secondary circuit 13 decreases, if the change in the flow rate is small, the user may not notice the change in the flow rate.
- FIG. 11 is a block diagram for explaining another example of the control performed by the pump controller shown in FIG.
- a light 15 such as an LED (Light Emitting Diode) is connected to the pump controller 11.
- the light 15 is provided at a position that can be visually recognized by the user who uses the load-side device 4.
- the load-side device 4 is a heating radiator, the load-side device 4 is provided with a light 15.
- the user If the temperature of the fluid used in the load-side device 4 does not rise to the target temperature, the user tries to change the set temperature to a value higher than the current set value, but when the light 15 is turned on, the user can use it. It can be recognized that the heating capacity of the heat source machine 1 has reached the upper limit. As a result, it is possible to prevent the user from forcibly raising the secondary side target temperature Tw2s of the secondary side circuit 13.
- the hot water supply / heating system 100 of the first embodiment includes a heat source machine 1 that generates heat, a heat medium heat exchanger 7 that relays heat supply from the heat source machine 1 to the load side device 4, and a primary side circuit 12. , A secondary side circuit 13, a heat source machine controller 30, and a pump controller 11.
- the primary side circuit 12 is a circuit in which the first heat medium circulates between the heat source machine 1 and the heat medium heat exchanger 7.
- the primary side circuit 12 contains the temperatures of the first pump 2 that circulates the first heat medium between the heat source machine 1 and the heat medium heat exchanger 7 and the temperature of the first heat medium that flows out from the heat source machine 1.
- a first temperature sensor 3 for detecting the primary side fluid temperature Tw1 is provided.
- the secondary side circuit 13 is a circuit in which a second heat medium flows between the load side device 4 and the heat medium heat exchanger 7.
- the secondary side circuit 13 is provided with a second pump 5 for circulating a second heat medium between the load side device 4 and the heat medium heat exchanger 7.
- the heat source machine controller 30 is a controller that controls the heating capacity, which is the amount of heat generated in the heat source machine 1, and has a primary side determination means 31, a capacity determination means 32, and a notification means 34.
- the primary side determination means 31 determines whether or not the primary side fluid temperature Tw1 detected by the first temperature sensor 3 is lower than the primary side target temperature Tw1s.
- the heating capacity of the heat source machine 1 is the same as a predetermined upper limit value. Judge whether or not.
- the capacity determining means 32 determines that the heating capacity of the heat source machine 1 is the same as the upper limit value
- the notification means 34 is information that the heating capacity of the heat source machine 1 has reached the upper limit value as control information.
- the arrival information is transmitted to the pump controller 11.
- the pump controller 11 controls the second pump 5 based on the control information received from the heat source controller 30.
- the pump controller 11 has a pump control means 42 that lowers the operating frequency of the second pump 5 when it receives the upper limit arrival information from the heat source controller 30.
- the pump controller 11 can confirm that the heating capacity of the primary circuit 12 has reached the limit. As a result, the pump controller 11 can raise the temperature of the fluid in the secondary circuit 13 by controlling the second pump 5 to reduce the flow rate of the fluid in the secondary circuit 13.
- the pump controller 11 determines whether or not the heat load generated by the load-side device is low, and controls to lower the operating frequency of the second pump 5 when the heat load is low. good. In this case, even if the flow rate of the fluid in the secondary circuit 13 decreases, the heat load of the load side device 4 is low, so that the change in the flow rate of the secondary circuit 13 is not noticed by the user, and the secondary circuit The temperature of the fluid of 13 can be raised to the secondary side target temperature Tw2s.
- the communication device 8 may not be provided.
- the communication standard between the heat source controller 30 and the pump controller 11 is the same, the communication device 8 may be omitted.
- the first embodiment can be applied to an existing hot water supply / heating system in which the pump controller 11 is not provided.
- the first embodiment can be applied to the hot water supply / heating system of the comparative example shown in FIG.
- 1 heat source machine 2 1st pump, 3 1st temperature sensor, 4 load side equipment, 5 2nd pump, 6 2nd temperature sensor, 7 heat medium heat exchanger, 8 communication equipment, 9 inverter, 10 3rd temperature sensor , 11 pump controller, 12 primary side circuit, 13 secondary side circuit, 15 light, 20 refrigerant circuit, 21 compressor, 23 heat source side heat exchanger, 24 expansion valve, 25 fan, 26 load side heat exchanger, 27 Refrigerator piping, 30 heat source unit controller, 31 primary side determination means, 32 capacity determination means, 33 refrigeration cycle control means, 34 notification means, 41 secondary side determination means, 42 pump control means, 51 signal line, 55 motor, 56.
- Power conversion circuit Power conversion circuit, 57 inverter circuit, 61 processing circuit, 71 processor, 72 memory, 73 bus, 100 hot water supply and heating system, 111 heat source machine, 121 primary side circuit, 131 secondary side circuit, 152 first pump, 155 second Pump, 200 hot water supply and heating system.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Description
本実施の形態1の給湯暖房システムの構成を説明する。図1は、実施の形態1に係る給湯暖房システムの一構成例を示す図である。図1に示すように、給湯暖房システム100は、熱源機1と、熱媒体熱交換器7と、熱源機1と熱媒体熱交換器7とを接続する1次側回路12と、熱媒体熱交換器7と負荷側機器4とを接続する2次側回路13と、ポンプコントローラ11とを有する。負荷側機器4は、例えば、暖房用ラジエータまたは貯湯タンクである。
Q = Gw × Cp × ΔTw ・・・(1)
Claims (5)
- 熱を生成する熱源機と、
前記熱源機から負荷側機器への前記熱の供給を中継する熱媒体熱交換器と、
前記熱源機と前記熱媒体熱交換器との間で第1熱媒体が循環する1次側回路と、
前記1次側回路に設けられ、前記熱源機と前記熱媒体熱交換器との間で前記第1熱媒体を循環させる第1ポンプと、
前記負荷側機器と前記熱媒体熱交換器との間で第2熱媒体が流通する2次側回路と、
前記2次側回路に設けられ、前記負荷側機器と前記熱媒体熱交換器との間で前記第2熱媒体を流通させる第2ポンプと、
前記熱源機から前記1次側回路を介して流出される前記第1熱媒体の温度である1次側流体温度を検出する第1温度センサと、
前記熱源機における前記熱の発生量である加熱容量を制御する熱源機コントローラと、
前記熱源機コントローラから受信する制御情報に基づいて前記第2ポンプを制御するポンプコントローラと、
を有し、
前記熱源機コントローラは、
前記第1温度センサによって検出される前記1次側流体温度が1次側目標温度より低いか否かを判定する1次側判定手段と、
前記1次側判定手段によって前記1次側流体温度が前記1次側目標温度よりも低いと判定される場合、前記熱源機の加熱能力が予め決められた上限値と同じか否かを判定する能力判定手段と、
前記能力判定手段によって前記熱源機の加熱能力が前記上限値と同じと判定される場合、前記制御情報として、前記熱源機の加熱能力が前記上限値に達している旨の情報である上限到達情報を前記ポンプコントローラに送信する報知手段と、を有し、
前記ポンプコントローラは、
前記熱源機コントローラから前記上限到達情報を受信すると、前記第2ポンプの運転周波数を下げるポンプ制御手段を有する、
給湯暖房システム。 - 前記熱媒体熱交換器から前記2次側回路を介して前記負荷側機器に流入する前記第2熱媒体の温度である2次側流体入口温度を検出する第2温度センサを有し、
前記ポンプコントローラは、
前記熱源機コントローラから前記上限到達情報を受信すると、前記2次側流体入口温度に基づいて前記負荷側機器で生じる熱負荷が低いか否かを判定する2次側判定手段を有し、
前記ポンプ制御手段は、
前記2次側判定手段によって前記熱負荷が低いと判定される場合、前記第2ポンプの運転周波数を下げる、
請求項1に記載の給湯暖房システム。 - 前記2次側判定手段は、
前記2次側流体入口温度と2次側目標温度との温度差が予め決められた第1閾値以下である場合、前記熱負荷が低いと判定する、
請求項2に記載の給湯暖房システム。 - 前記負荷側機器から前記2次側回路に流出する前記第2熱媒体の温度である2次側流体出口温度を検出する第3温度センサを有し、
前記2次側判定手段は、
前記2次側流体入口温度と前記2次側流体出口温度との温度差が予め決められた第2閾値以下である場合、前記熱負荷が低いと判定する、
請求項2に記載の給湯暖房システム。 - 前記ポンプコントローラに接続されるライトを有し、
前記ポンプコントローラは、前記熱源機コントローラから前記上限到達情報を受信すると、前記ライトを点灯させる、
請求項1~4のいずれか1項に記載の給湯暖房システム。
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US18/027,034 US20230375193A1 (en) | 2020-12-07 | 2020-12-07 | Hot-water supply and heating system |
PCT/JP2020/045476 WO2022123626A1 (ja) | 2020-12-07 | 2020-12-07 | 給湯暖房システム |
GB2306938.8A GB2615913B (en) | 2020-12-07 | 2020-12-07 | Hot water heating system |
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US11897828B1 (en) | 2023-03-03 | 2024-02-13 | EnhancedGEO, Holdings, LLC | Thermochemical reactions using geothermal energy |
US11905814B1 (en) | 2023-09-27 | 2024-02-20 | EnhancedGEO Holdings, LLC | Detecting entry into and drilling through a magma/rock transition zone |
US11912573B1 (en) | 2023-03-03 | 2024-02-27 | EnhancedGEO Holdings, LLC | Molten-salt mediated thermochemical reactions using geothermal energy |
US11913679B1 (en) | 2023-03-02 | 2024-02-27 | EnhancedGEO Holdings, LLC | Geothermal systems and methods with an underground magma chamber |
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US12055131B2 (en) | 2022-02-28 | 2024-08-06 | EnhancedGEO Holdings, LLC | Geothermal power from superhot geothermal fluid and magma reservoirs |
US12060765B1 (en) | 2023-07-27 | 2024-08-13 | EnhancedGEO Holdings, LLC | Float shoe for a magma wellbore |
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GB2615913A8 (en) | 2024-04-17 |
US20230375193A1 (en) | 2023-11-23 |
GB2615913B (en) | 2024-07-10 |
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GB2615913A (en) | 2023-08-23 |
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