EP4148330A1 - Zirkulationssystem für ein heizmedium - Google Patents

Zirkulationssystem für ein heizmedium Download PDF

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Publication number
EP4148330A1
EP4148330A1 EP22194787.2A EP22194787A EP4148330A1 EP 4148330 A1 EP4148330 A1 EP 4148330A1 EP 22194787 A EP22194787 A EP 22194787A EP 4148330 A1 EP4148330 A1 EP 4148330A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
cycle
heat medium
heat pump
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22194787.2A
Other languages
English (en)
French (fr)
Inventor
Makoto TANIYAMA
Takanobu Fujimoto
Tadashi Yanagisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of EP4148330A1 publication Critical patent/EP4148330A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • 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
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/104—Inspection; Diagnosis; Trial operation
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/12—Preventing or detecting fluid leakage
    • 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
    • F24H15/242—Pressure
    • 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
    • F24H15/395—Information to users, e.g. alarms
    • 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
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • 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
    • 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
    • F24H15/457—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible using telephone networks or Internet communication

Definitions

  • the present invention relates to a heat medium circulation system.
  • a control device determines that refrigerant leaks and refrigerant is insufficient. Further, if discharge pressure which is detected by the discharge pressure detecting means is smaller than second set pressure which is set smaller than the first set pressure, the control device determines that refrigerant leaks and refrigerant is insufficient. Then, the control device stops the operation of the compressor (see patent document 1 for example).
  • Patent Document 1 Japanese Patent Application Laid-open No.2013-185803
  • the conventional configuration has a problem that if more than half refrigerant is not reliably missing, leakage abnormality of refrigerant cannot be detected.
  • a heat medium circulation system of the present invention solves the above-described problem, and based on a detected value of a pressure sensor which is detected after completion of trial operation in which a heat pump cycle and a heating cycle are operated after water is poured to the heating cycle, it is determined that refrigerant leaks from the heat pump cycle to the heating cycle. According to this, initial leakage of refrigerant can be detected early when the trial operation is completed. Further, erroneous detections of leakage of refrigerant can be reduced. For the reason described above, it is possible to provide a safe heat medium circulation system capable of finding leakage of refrigerant early.
  • a heat medium circulation system of the present invention includes: a heat pump cycle through which refrigerant circulates; a heating cycle through which heat medium heated by the heat pump cycle circulates between the heat pump cycle and a heating terminal; a pressure sensor for detecting pressure of the heat medium in the heating cycle; and a control device.
  • the control device determines that the refrigerant leaks from the heat pump cycle to the heating cycle based on a detected value of the pressure sensor which is detected after a trial operation for operating the heat pump cycle and the heating cycle is completed after water is poured to the heating cycle.
  • the heat medium circulation system of the invention it is possible to early detect initial leakage of refrigerant after trial operation is completed. Further, erroneous detection of leakage of refrigerant can be reduced.
  • a heat medium circulation system of the present invention includes: a heat pump cycle through which refrigerant circulates; a heating cycle through which heat medium heated by the heat pump cycle circulates between the heat pump cycle and a heating terminal; a pressure sensor for detecting pressure of the heat medium in the heating cycle; and a control device.
  • the control device determines that the refrigerant leaks from the heat pump cycle to the heating cycle based on a detected value of the pressure sensor which is detected after a trial operation for operating the heat pump cycle and the heating cycle is completed after water is poured to the heating cycle.
  • the control device may determine that the refrigerant leaks from the heat pump cycle to the heating cycle based on the detected value of the pressure sensor which is detected when the trial operation is stopped.
  • the control device may determine that the refrigerant leaks from the heat pump cycle to the heating cycle based on the detected value of the pressure sensor detected during normal operation which operates the heat pump cycle and the heating cycle.
  • control device may determine that refrigerant leaks from the heat pump cycle to the heating cycle.
  • the control device may determine that refrigerant leaks from the heat pump cycle to the heating cycle based on a magnitude of a difference between a detected value of the pressure sensor and a preset reference value.
  • Detection accuracy of leakage of refrigerant is enhanced, and erroneous detection of leakage of refrigerant is reduced.
  • the reference value may be a detected value of the pressure sensor which is detected when the operation is stopped after the trial operation is completed.
  • control device may include an operation history storage device for storing operation history. Only when the operation history storage device has operation history, the control device may determine that refrigerant leaks from the heat pump cycle to the heating cycle.
  • Leakage of refrigerant is detected only when there is operation history in times past. According to this, it is possible to prevent erroneous detection caused by pressure rise at the time of the trial operation.
  • a warning device for warning about leakage of refrigerant may further be included.
  • the control device may operate the warning device when it is determined that refrigerant leaks from the heat pump cycle to the heating cycle.
  • FIG. 1 A configuration of a heat medium circulation system 100 of a first embodiment will be described below using Fig. 1 .
  • the heat medium circulation system 100 of the embodiment includes a heat pump cycle 24 through which refrigerant circulates, and a heating cycle 50 through which heat medium heated in the heat pump cycle 24 circulates between the heat pump cycle 24 and a heating terminal 37.
  • the heat pump cycle 24 is composed by connecting a compressor 20, a water-refrigerant heat exchanger 21, decompression means 22 and an air heat exchanger 23 to one another.
  • the heating cycle 50 includes a heating terminal 37, a circulation pump 25, water-going temperature detecting means 34, water-entering temperature detecting means 33, a flow rate sensor 26, a pressure sensor 27, a relief value 28, a purge valve 29 and a heater unit 30.
  • the heating terminal 37 heats a home using hot water which is heated by the water-refrigerant heat exchanger 21.
  • the circulation pump 25 circulates hot water between the water-refrigerant heat exchanger 21 and the heating terminal 37.
  • the water-going temperature detecting means 34 detects going-temperature of circulation water.
  • the water-entering temperature detecting means 33 detects returning-temperature of circulation water.
  • the flow rate sensor 26 detects a circulation flow rate of heat medium which flows through the heating cycle 50.
  • the pressure sensor 27 detects pressure of heat medium which flows through the heating cycle 50.
  • the pressure sensor 27 is placed between the circulation pump 25 and the water-refrigerant heat exchanger 21.
  • the relief value 28 discharges heat medium flowing through the heating cycle 50 to outside of the cycle.
  • the purge valve 29 discharges air existing in the heating cycle 50 to outside of the cycle.
  • the heater unit 30 operates as an auxiliary heat source when ability of the heat pump is insufficient.
  • high pressure refrigerant compressed by the compressor 20 is sent to the water-refrigerant heat exchanger 21.
  • R32 is used as the refrigerant, but other refrigerants can also be used.
  • the water-refrigerant heat exchanger 21 is composed of a heat exchanger formed from laminated stainless steel plates.
  • the circulation pump 25 sends circulation water to the water-refrigerant heat exchanger 21 through a hot water returning pipe 32.
  • heated refrigerant and circulation water exchange heat and circulation hot water is produced.
  • the circulation hot water is sent to the heating terminal 37 through a hot water-going pipe 31.
  • the heating terminal 37 carries out the heating operation.
  • the circulation hot water which radiates heat in the heating terminal 37 is sent to the water-refrigerant heat exchanger 21 through the hot water returning pipe 32 by the circulation pump 25, and the circulation hot water is again heated.
  • the water-refrigerant heat exchanger 21 is placed outside (more specifically, outdoor unit 44), and the circulation pump 25 and a control device 35 are placed inside (more specifically, indoor unit 43) .
  • the pressure sensor 27 which detects pressure of heat medium is placed between the circulation pump 25 and the water-refrigerant heat exchanger 21.
  • the control device 35 determines that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50 based on a detected value of the pressure sensor 27 when the operation of the heat medium circulation system 100 is stopped.
  • the purge valve 29 for discharging air existing in the heating cycle 50 and the relief value 28 for discharging hot water when pressure in the circulation water circuit exceeds 0.3 MPa for example are placed in the heating cycle 50.
  • the control device 35 determines that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50 based on the detected value of the pressure sensor 27 which is detected after the trial operation for operating the heat pump cycle 24 and the heating cycle 50 is completed after water is poured to the heating cycle 50.
  • the control device 35 determines that refrigerant leaks, the control device 35 operates a warning device (not shown). According to this, it is possible to reliably inform a user and a repairer of leakage of refrigerant.
  • the warning device may be provided in a remote controller 42.
  • the warning device may be provided in an information terminal 41 which can communicate with the control device 35 through a network circuit 40 such as the Internet for example.
  • a user and a repairer can recognize its status.
  • the control device 35 may be connected to the network circuit 40 through an HEMS (Home Energy Management System) controller 38 and a network transceiver 39.
  • HEMS Home Energy Management System
  • Examples of the information terminal 41 are a tablet terminal, a cell-phone and a smartphone. Detection of the above-described leakage of refrigerant may be carried out not by the control device 35, but by a server which can communicate with the control device 35 through the network circuit 40 such as the Internet.
  • FIG. 2 An operation example 1 in Fig. 2 shows transition of pressure detected by the pressure sensor 27 when the heat medium circulation system 100 is operated in a state (normal state) where refrigerant does not leak.
  • An operation example 2 in Fig. 2 shows transition of pressure detected by the pressure sensor 27 when the heat medium circulation system 100 is operated in a state where refrigerant leaks.
  • the heat medium is water, but the heat medium is not limited to water.
  • the heating cycle 50 is not filled with water which is the heat medium. By pour water into the heating cycle 50, air existing in the heating cycle 50 before water is poured is pushed out, and this air is discharged outside of the heating cycle 50 from the purge valve 29.
  • the heat medium circulation system 100 installed in a service space is actually operated, and a trial operation for checking whether there is a problem in the heat medium circulation system 100 or the installing operation is carried out. If the trial operation is started, pressure detected by the pressure sensor 27 rises due to influence of the operated compressor 20 and the circulation pump 25. At this time, when pressure detected by the pressure sensor 27 almost exceeds or actually exceeds a predetermined value (0.3 MPa in this embodiment), the control device 35 operates the relief value 28 to bring the pressure to a value equal to or smaller than the predetermined value (0.3 MPa) .
  • the heat medium circulation system 100 is stopped.
  • a pressure value detected by the pressure sensor 27 is lowered with time after the trial operation is completed as shown in the operation example 1, and the heat medium circulation system is brought into the steady state.
  • the control device 35 does not determine that refrigerant leaks in the heat medium circulation system 100.
  • the pressure value detected by the pressure sensor 27 rises after the operation is stopped as shown in the operation example 2, and the pressure reaches the predetermined value (0.3 MPa) in due course for detecting leakage of refrigerant. According to this, the control device 35 determines that refrigerant leaks in the heat medium circulation system 100.
  • the control device 35 determines that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50.
  • the predetermined value a numeric value by which it is obviously possible to determine that refrigerant leaks, it is possible to prevent erroneous detection.
  • control device 35 determines that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50, but the present invention is not limited to the embodiment.
  • the control device 35 may determine that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50 based on a magnitude of a difference between the detected value of the pressure sensor 27 and a preset reference value.
  • detection of leakage of refrigerant is carried out when the operation is stopped immediately after the trial operation, but the invention is not limited to this.
  • the detection of leakage of refrigerant is carried out in the above-described method also when the operation is stopped after normal operation.
  • An operation example 3 in Fig. 3 shows transition of pressure detected by the pressure sensor 27 when the heat medium circulation system 100 is operated in a state where refrigerant leaks.
  • the control device 35 detects leakage of refrigerant from the heat pump cycle to the heating cycle when a difference between a detected value of the pressure sensor 27 at the time of normal operation and a reference value becomes larger than a predetermined value.
  • the reference value may be a detected value of the pressure sensor 27 when the operation is stopped after trial operation of the heat medium circulation system 100 is stopped. According to this, by carrying out trial operation after the heat medium circulation system 100 is installed in a user's house, the reference value of leakage of refrigerant can be set. Hence, it is possible to set optimal reference value which is suitable for using environment of respective users, and it is possible to detect leakage of refrigerant with higher precision.
  • control device 35 may determine that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50.
  • Operation examples 4 and 5 in Fig. 4 show transition of pressure detected by the pressure sensor 27 when the heat medium circulation system 100 is operated under environment which is different from that of the operation example 3.
  • the control device 35 determines that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50.
  • the control device 35 since the difference between the detected value of the pressure sensor 27 and the reference value is smaller than the predetermined value and the detected value of the pressure sensor 27 is smaller than the predetermined value, the control device 35 does not determine that refrigerant leaks.
  • the control device 35 may include an operation history storage device 70 which stores operation history. Only when the operation history storage device 70 stores information that there is operation history, the control device 35 may determine that refrigerant leaks from the heat pump cycle 24 to the heating cycle 50.
  • the heat medium circulation system of the present invention it is possible to early find leakage of refrigerant from the heat pump cycle to the heating cycle, prevent erroneous detection, and inform a user of the leakage. From the standpoint of enhancement of safety of a user, usability as a heating system is enhanced.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Conditioning Control Device (AREA)
EP22194787.2A 2021-09-13 2022-09-09 Zirkulationssystem für ein heizmedium Pending EP4148330A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021148319A JP2023041134A (ja) 2021-09-13 2021-09-13 熱媒体循環システム

Publications (1)

Publication Number Publication Date
EP4148330A1 true EP4148330A1 (de) 2023-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22194787.2A Pending EP4148330A1 (de) 2021-09-13 2022-09-09 Zirkulationssystem für ein heizmedium

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EP (1) EP4148330A1 (de)
JP (1) JP2023041134A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117739532A (zh) * 2023-12-21 2024-03-22 广东昂舍科技有限公司 一种水箱内盘管泄漏检测方法、系统及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009236425A (ja) * 2008-03-27 2009-10-15 Denso Corp 室外ユニットおよびこれを備えたヒートポンプ式給湯機
JP2013185803A (ja) 2012-03-12 2013-09-19 Panasonic Corp ヒートポンプ式温水暖房装置
EP2759787A1 (de) * 2011-09-13 2014-07-30 Mitsubishi Electric Corporation Wärmepumpenvorrichtung und verfahren zur steuerung der wärmepumpenvorrichtung
EP3647687A1 (de) * 2017-06-26 2020-05-06 Mitsubishi Electric Corporation Vorrichtung mit verwendung einer wärmepumpe
EP3822545A1 (de) * 2019-11-15 2021-05-19 Viessmann Werke GmbH & Co. KG Verfahren zum betrieb einer wärmepumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009236425A (ja) * 2008-03-27 2009-10-15 Denso Corp 室外ユニットおよびこれを備えたヒートポンプ式給湯機
EP2759787A1 (de) * 2011-09-13 2014-07-30 Mitsubishi Electric Corporation Wärmepumpenvorrichtung und verfahren zur steuerung der wärmepumpenvorrichtung
JP2013185803A (ja) 2012-03-12 2013-09-19 Panasonic Corp ヒートポンプ式温水暖房装置
EP3647687A1 (de) * 2017-06-26 2020-05-06 Mitsubishi Electric Corporation Vorrichtung mit verwendung einer wärmepumpe
EP3822545A1 (de) * 2019-11-15 2021-05-19 Viessmann Werke GmbH & Co. KG Verfahren zum betrieb einer wärmepumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117739532A (zh) * 2023-12-21 2024-03-22 广东昂舍科技有限公司 一种水箱内盘管泄漏检测方法、系统及装置

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