WO2014174678A1 - Dispositif d'alimentation en eau chaude de pompe à chaleur et système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur - Google Patents

Dispositif d'alimentation en eau chaude de pompe à chaleur et système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur Download PDF

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Publication number
WO2014174678A1
WO2014174678A1 PCT/JP2013/062452 JP2013062452W WO2014174678A1 WO 2014174678 A1 WO2014174678 A1 WO 2014174678A1 JP 2013062452 W JP2013062452 W JP 2013062452W WO 2014174678 A1 WO2014174678 A1 WO 2014174678A1
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WIPO (PCT)
Prior art keywords
water
refrigerant
heat pump
hot water
flow rate
Prior art date
Application number
PCT/JP2013/062452
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English (en)
Japanese (ja)
Inventor
亮宜 倉地
大林　誠善
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2013/062452 priority Critical patent/WO2014174678A1/fr
Priority to EP13883242.3A priority patent/EP2990736B1/fr
Priority to JP2015513470A priority patent/JP5972456B2/ja
Publication of WO2014174678A1 publication Critical patent/WO2014174678A1/fr

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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
    • 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
    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • 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
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • 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
    • 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
    • F24H15/30—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
    • 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
    • F24D2220/044—Flow sensors
    • 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
    • F24D2220/08—Storage tanks

Definitions

  • the present invention relates to a heat pump water heater and a hot water storage system including the heat pump water heater.
  • the high-pressure side CO 2 discharged from the compressor has a characteristic of being in a supercritical state, unlike a fluorocarbon refrigerant. That is, the CO 2 in the supercritical state does not condense and remains in the supercritical state when heat is applied to another fluid (for example, water, air, refrigerant, etc.) by heat exchange. CO 2 having such characteristics has little loss due to state transition, and is suitable for heat pump devices that require high temperatures. Therefore, various heat pump water heaters have been proposed that use CO 2 as a refrigerant and take advantage of CO 2 to boil water to a high temperature of 90 [° C.] or higher.
  • a hot water supply heating means a hot water storage tank for storing hot water heated by the hot water supply heating means, a plurality of heat radiation means for circulating the hot water stored in the hot water storage tank as a heat source, Selection means for selecting whether or not to use the heat dissipating means, and control means for controlling the hot water heating operation for heating the hot water heating means and storing the hot water in the hot water storage tank according to the selection status of the selection means.
  • a hot water heater has been disclosed (see, for example, Patent Document 1). In this heat pump water heater, the flow rate of hot water is controlled by a circulation pump.
  • the hot water heated by the hot water heater is supplied to the hot water tank, or the hot water stored in the hot water tank is circulated to the heat pump water heater.
  • a pump is used to warm. This pump is provided in the water heater or connected to the water heater.
  • the pump fails, even if the heat pump operation is restarted after the water is shut off, the hot water heated by the hot water heating means cannot be sent to the hot water tank and cannot be stored, or the hot water stored in the hot water tank cannot be stored. The problem arises that it cannot be circulated through the machine.
  • FIG. 8 is a diagram for explaining a problem of the prior art.
  • 8A and 8B show a hot water storage system in which the hot water tank 1 and the hot water heater 130 are connected by a water inflow pipe 131 having a valve body 134 and a water outflow pipe 132 having a valve body 135. An example is shown.
  • the water cutoff detection means which consists of a pressure switch of patent document 2 may detect this accidentally as water cutoff.
  • a temporary decrease in the flow rate that returns after a few seconds is not treated as a water outage.
  • FIG. 8 (c) and 8 (d) are diagrams showing an example of a connection pipe (including a water outflow pipe and a water inflow pipe) to the water heater 130 and a valve provided in the connection pipe.
  • a connection pipe including a water outflow pipe and a water inflow pipe
  • FIG. 8C When the three-way valve 182 is connected to the connection pipe of the water heater 130 as shown in FIG. 8C, or two or more two-way valves are connected to the connection pipe of the water heater 130 as shown in FIG.
  • FIG. 9 is a graph showing an example of the relationship between the valve opening and the flow rate when the flow path is switched using the two-way valves 183a and 183b shown in FIG. As shown in FIG.
  • the present invention has been made against the background of the above problems, and even when a temporary flow rate drop occurs, a heat pump water heater that can be operated without hindrance thereafter, and a hot water storage provided with the heat pump water heater A system is provided.
  • the heat pump water heater includes a compressor, a refrigerant-water heat exchanger, a decompression device, and an evaporator at least connected to a pipe, and the refrigerant-water heat exchanger performs heat exchange between the refrigerant and water. And a flow rate detection means for detecting the flow rate of water flowing through the refrigerant-water heat exchanger, and a control means for controlling the operation of the heat pump cycle device, wherein the flow rate of water detected by the flow rate detection means is When the state lower than the threshold value continues for a set time or longer, the control means determines that the water supply is abnormal and stops the operation of the heat pump cycle device.
  • the present invention when the state in which the flow rate of water flowing through the refrigerant-water heat exchanger is lower than the threshold value continues for a set time or longer, it is determined that the water supply is abnormal and the operation of the heat pump cycle device is stopped. For this reason, it is possible to suppress erroneous detection of the water-stopping state due to, for example, malfunction of the flow rate detection means due to noise or the like, or temporary decrease in flow rate. In addition, even if a temporary flow rate drop occurs, the pump can be operated without any trouble after the temporary flow rate drop as long as the pump that circulates water through the refrigerant-water heat exchanger does not fail. can get.
  • FIG. 1 It is a piping circuit diagram which shows the hot water storage system 100 which concerns on Embodiment 2 of this invention. It is a flowchart explaining operation
  • FIG. 1 is a piping circuit diagram showing a hot water storage system 100 according to Embodiment 1 of the present invention.
  • a hot water storage system 100 includes a hot water storage tank 1 and a heat pump water heater 30 (hereinafter simply referred to as a hot water heater 30) that is means for heating water in the hot water tank 1.
  • Hot water heated by the hot water heater 30 is stored in the hot water tank 1, and hot water is supplied from the hot water tank 1 to a water tap of a facility (for example, a bathroom or a kitchen) that uses the hot water.
  • the lower part of the hot water tank 1 is connected to the water heater 30 via a water inflow pipe 31 through which the water in the hot water tank 1 flows into the water heater 30.
  • a temperature detector 2 is provided below the hot water tank 1, for detecting the water temperature at substantially the same height as the part to which the water inflow pipe 31 is connected.
  • the specific structure of the temperature detector 2 is not limited as long as it can detect the water temperature.
  • the upper part of the hot water tank 1, specifically the upper part than the part where the water inflow pipe 31 is connected is connected to the hot water heater 30 via a water outflow pipe 32 through which water flowing out of the hot water heater 30 flows.
  • the water inflow pipe 31 is branched between the hot water storage tank 1 and the water heater 30, and this branched pipe is referred to as a water inflow pipe 31a.
  • the water inflow pipe 31 a is connected to the water receiving tank 3 through the water supply pipe 4.
  • the water receiving tank 3 is a tank that stores water to be supplied to the hot water storage system 100.
  • the water supply pipe 4 is provided with a water supply valve 5 that controls the amount of water supplied from the water receiving tank 3 to the water heater 30.
  • Each of the water inflow pipe 31 and the water outflow pipe 32 is, for example, a valve that is a manual valve in order to shut off the water piping path between the water heater 30 and the hot water tank 1 during maintenance or replacement of the water heater 30.
  • the body is provided.
  • the water inflow pipe 31 is provided with a valve body 33 and a valve body 34 in series, and the water inflow pipe 31 a is branched from between the valve body 33 and the valve body 34.
  • the water outflow pipe 32 is provided with a valve body 35.
  • a hot water supply pipe 6 connected to a water tap (not shown) is connected to the upper part of the hot water tank 1.
  • the hot water supply pipe 6 is provided with a hot water supply pump 7 for sending hot water stored in the hot water tank 1 to the water tap.
  • one end of the return pipe 8 is connected to the lower part of the hot water tank 1, more specifically below the part to which the hot water supply pipe 6 is connected.
  • the hot water supply pump 7 may be provided in the return pipe 8.
  • FIG. 2 is a piping circuit diagram illustrating the water heater 30 according to Embodiment 1 of the present invention.
  • the water heater 30 according to the present embodiment includes a heat pump cycle device (same as the refrigeration cycle device) 50 as a heat source.
  • the heat pump cycle device 50 uses a CO 2 refrigerant.
  • the high-pressure CO 2 refrigerant has a characteristic of being in a supercritical state.
  • the CO 2 refrigerant in the supercritical state does not condense when heat is applied to another fluid (here, water) by heat exchange, and remains in the supercritical state. For this reason, there is little loss by a state transition and it is suitable for heating water to high temperature.
  • a compressor 51 In this heat pump cycle device 50, a compressor 51, a refrigerant-water heat exchanger 52 as a radiator, a decompression device 53, and an evaporator 54 are sequentially connected to form a refrigerant circuit.
  • the compressor 51 is connected to a refrigerant-water heat exchanger 52 via a refrigerant inflow pipe 55.
  • the refrigerant-water heat exchanger 52 is connected to the decompression device 53 via a refrigerant outflow pipe 56.
  • the decompression device 53 is connected to the evaporator 54 by piping, and the evaporator 54 is connected to the compressor 51 by piping.
  • the refrigerant used in the heat pump cycle device 50 is not limited to CO 2 , for example, HFC (hydrofluorocarbon) refrigerants such as R410A, R407C, R404A, and R32, HCFC (hydrochlorofluorocarbon) refrigerants such as R22 and R134a, or carbonization
  • HFC hydrofluorocarbon
  • HCFC hydroochlorofluorocarbon
  • R22 and R134a HCFC (hydrochlorofluorocarbon) refrigerants
  • carbonization Various refrigerants such as natural refrigerants such as hydrogen and helium can be used.
  • the refrigerant-water heat exchanger 52 functions as a condenser.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 51 flows into the refrigerant-water heat exchanger 52 and flows through the refrigerant-water heat exchanger 52 (in this embodiment, water). Heat is exchanged between the refrigerant and the water to dissipate the heat and flows out of the refrigerant-water heat exchanger 52.
  • the refrigerant that has flowed out of the refrigerant-water heat exchanger 52 is decompressed by the decompression device 53, flows into the evaporator 54, rises in temperature, and is sucked into the compressor 51.
  • the number of refrigerant-water heat exchangers 52 is not limited, and one or a plurality of refrigerant-water heat exchangers 52 can be provided in accordance with the required heating amount of water.
  • a water inflow pipe 31 and a water outflow pipe 32 are connected to the refrigerant-water heat exchanger 52.
  • the water flowing into the refrigerant-water heat exchanger 52 through the water inflow pipe 31 exchanges heat with the refrigerant flowing through the refrigerant-water heat exchanger 52, and passes through the water outflow pipe 32 to pass through the hot water tank 1 ( 1).
  • the water inflow pipe 31 is provided with a water supply pump 36 for sending water to the refrigerant-water heat exchanger 52.
  • the feed water pump 36 may be capable of adjusting the flow rate by making the rotation speed variable, or may be a constant flow rate (rotation speed).
  • the water supply pump 36 may be provided in the water outflow pipe 32.
  • the water supply pump 36 may be incorporated in the water heater 30 as shown in FIG. 2, or may be provided in a portion of the water inflow pipe 31 or the water outflow pipe 32 exposed from the outline of the water heater 30. Good.
  • the water inflow pipe 31 is provided with a flow rate detection means 40 for detecting the flow rate of water flowing through the refrigerant-water heat exchanger 52.
  • the flow rate detection means 40 can be configured by an arbitrary flow rate sensor such as an electric type, a mechanical type, an ultrasonic type, or a thermal type.
  • the refrigerant may generate bubbles before passing through the water supply pump 36 where cavitation may occur.
  • -A flow rate detection means 40 is provided between the water supply pump 36 of the water inflow pipe 31 and the refrigerant-water heat exchanger 52 as a position where the pressure becomes highest, avoiding the position after passing through the water heat exchanger 52. Yes.
  • Information detected by the flow rate detection means 40 and the temperature detector 2 is input into the housing of the hot water heater 30 and at least control means for controlling the operation of the hot water supply pump 7, the valve bodies 34 and 35, and the compressor 51. 60.
  • the decompression device 53 is configured by an expansion valve whose valve opening degree can be adjusted, the operation of the decompression device 53 can be controlled by the control means 60, and the valve body 34 and the valve body 35 are opened.
  • the control means 60 can also control these valves as long as they are adjustable.
  • the control means 60 is provided in the housing of the water heater 30, but the installation position of the control means 60 is arbitrary.
  • the control means 60 may be realized by a CPU and a program that is analyzed and executed by the CPU, or may be realized as hardware by wired logic. It should be noted that the functions realized by the control means 60 can also be realized by devices physically distributed in arbitrary units. Further, the control means 60 has a rewritable storage means 61 and can record the flow rate detected by the flow rate detection means 40 in the storage means 61 as will be described later.
  • the water heater 30 is provided with a notification means 62 for notifying the operating state of the water heater 30 and information to be notified to the user.
  • the notification means 62 is, for example, a display device such as a liquid crystal monitor that visually displays information, or a sound output device such as a speaker or buzzer that notifies information audibly. Note that both a display device and an audio output device may be provided as the notification means 62, or either one may be provided.
  • the hot water storage system 100 of the present embodiment heats the water stored in the hot water storage tank 1 or the water stored in the water receiving tank 3 with the hot water heater 30 (refrigerant-water heat exchanger 52), and hot water storage tank Send to 1. Then, the control means 60 of the present embodiment sets the operation mode of the water heater 30 as a circulation mode in which water is circulated and heated between the water heater 30 (refrigerant-water heat exchanger 52) and the hot water tank 1. In addition, at least two operation modes of hot water storage mode in which hot water heated by the water heater 30 is stored in the hot water storage tank 1 are provided.
  • the hot water storage mode is different from the circulation mode in that the water supplied from the water receiving tank 3 is heated by the water heater 30 to store the hot water in the hot water tank 1 and no water is sent from the hot water tank 1 to the water heater 30.
  • FIG. 1 FIG. 2, the operation
  • the water heated by the water heater 30 (refrigerant-water heat exchanger 52) is water stored in the hot water tank 1.
  • the water temperature in the hot water tank 1 is higher at the upper part, and the water temperature is lower toward the lower part.
  • the control means 60 is stored in the hot water tank 1 when the detected water temperature of the temperature detector 2 provided in the lower part of the hot water tank 1 becomes a predetermined heating start temperature or lower.
  • the water heater 30 is operated to start heating the water.
  • the control means 60 opens the valve body 33, the valve body 34, and the valve body 35 and operates the water supply pump 36.
  • the water stored in the lower part of the hot water tank 1 is sent to the hot water heater 30 (refrigerant-water heat exchanger 52) via the water inflow pipe 31. This water is heated by the hot water heater 30 (refrigerant-water heat exchanger 52) to become hot water.
  • the warm water flows into the hot water tank 1 through the water outflow pipe 32.
  • the temperature detected by the temperature detector 2 reaches a predetermined heating end temperature, the heating of the water stored in the hot water tank 1 is completed.
  • the hot water stored in the hot water tank 1 is supplied to a water tap (not shown) through the hot water supply pipe 6 when the hot water supply pump 7 is operated.
  • the control means 60 starts operation in the hot water storage mode.
  • the valve element 33 is closed and the water supply valve 5 is opened.
  • the water supply valve 5 is opened, the water stored in the water receiving tank 3 is sent to the water heater 30 (refrigerant-water heat exchanger 52) through the water inflow pipe 31a. This water is heated by the hot water heater 30 (refrigerant-water heat exchanger 52) to become hot water.
  • This hot water flows into the hot water tank 1 through the water outflow pipe 32 and is supplied to a water tap (not shown) through the hot water supply pipe 6.
  • the operation related to the determination of the abnormality of water interruption is the same regardless of whether the operation mode is the circulation mode or the hot water storage mode, and here, the water stored in the hot water tank 1 is used as the hot water heater 30 (refrigerant-water).
  • the operation of the hot water storage system 100 and the hot water heater 30 will be described taking the circulation mode of heating by the heat exchanger 52) as an example.
  • FIG. 3 is a flowchart showing determination processing for detecting water breakage in the water heater 30 according to Embodiment 1 of the present invention.
  • FIG. 4 is a graph showing an example of the relationship between the flow rate of water flowing through the refrigerant-water heat exchanger 52 and the elapsed time according to the embodiment of the present invention.
  • Control means 60 starts operation of water heater 30 (step S1).
  • the flow rate detection means 40 periodically detects the flow rate of water flowing through the refrigerant-water heat exchanger 52 (for example, every 30 seconds). Further, the flow rate periodically detected by the flow rate detection unit 40 is stored in the storage unit 61 in a ring buffer format, for example. Therefore, the storage means 61 stores the flow rate of water flowing through the refrigerant-water heat exchanger 52 for a predetermined period going back from the present time.
  • the state in which the flow rate of the water flowing through the refrigerant-water heat exchanger 52 detected by the flow rate detection means 40 is lower than the threshold value (hereinafter sometimes simply referred to as a flow rate reduction state) is set time T1 ( In this embodiment, it is determined whether or not to continue for 180 seconds (step S2). As shown in FIG. 4 (a), when the duration of the flow rate reduction state is less than the set time T1 (180 seconds) (step S2 in FIG. 3; Yes), the control means 60 determines that there is a water cutoff abnormality. Without returning to step S1, the operation of the water heater 30 is continued. On the other hand, as shown in FIG. 4B, when the duration time of the flow rate reduction state is equal to or longer than the set time T1 (180 seconds) (step S2 in FIG. 3; No), the control means 60 It is determined that an abnormality has occurred, and the process proceeds to step S3.
  • the set time T1 set in step S2 is a variable value according to the local connection piping path of the hot water storage system 100 and the pump used in the hot water storage system 100.
  • the set time T1 is set within a range of 60 seconds to 180 seconds.
  • the grounds for setting the set time T1 will be described.
  • the lower limit (60 seconds) of the range of the set time T1 is based on the following two grounds.
  • the first ground is that a three-way valve is connected to the connection pipe of the heat pump water heater as shown in FIG. 8C, or a connection pipe of the heat pump water heater as shown in FIG. 8D.
  • a temporary flow rate drop occurs as shown in FIG. 9 during valve operation such as flow path switching, and the flow rate detection means 40 may detect water breakage, It can be mentioned that the detection time of the flow rate drop at that time is less than 60 seconds.
  • the lower limit of the range of the set time T1 is set to 60 seconds, it is possible to suppress erroneous determination that the temporary flow rate decrease during the valve operation of the three-way valve or the two-way valve is in a water-stopped state.
  • the second reason is that the flow rate detection means 40 may malfunction due to the influence of noise or the like, temporarily fail to detect the flow rate, and may detect a decrease in the flow rate.
  • the detection time is less than 60 seconds. Based on these two grounds, the lower limit of the range of the set time T1 is 60 seconds.
  • the upper limit (180 seconds) of the range of the set time T1 is based on the following grounds.
  • a pump for example, a hot water supply pump 7 or a water supply pump 36
  • the cooling effect of the pump by the fluid is obtained. It can no longer be obtained.
  • FIG. 5 is a graph showing an example of the relationship between the temperature of the pump and the operation elapsed time, and shows a graph when the pump is operated in a state where the flow rate is lower than the threshold value. As shown in FIG.
  • the maximum time for which a margin (for example, twice) can be ensured with respect to the time (for example, 360 seconds in FIG. 5) until the component built in the pump reaches the operation guarantee temperature is within the range of the set time T1.
  • the upper limit is 180 seconds.
  • the range of the set time T1 is set to 60 seconds or more and 180 seconds or less.
  • the set time T1 is set for the control means 60 by a maintenance person or the like in the range of 60 seconds to 180 seconds.
  • the setting of the setting time T1 in the control means 60 is realized by an arbitrary configuration such as rewriting a program executed by the CPU of the control means 60 or switching a signal to the control means 60 using an operation switch (not shown). .
  • step S3 of FIG. 3 the control unit 60 causes the notification unit 62 to notify that a water-stop abnormality has been detected. Moreover, in order to protect apparatuses, such as the feed pump 36 and the compressor 51, the control means 60 stops these apparatuses. As a stopping method, a command may be directly output from the control means 60 to each device, or may be stopped via another device.
  • the compressor 51 can be provided with a high-pressure shut-off device, and the compressor 51 can be stopped via the high-pressure shut-off device.
  • the flow rate of the water flowing through the refrigerant-water heat exchanger 52 is periodically stored in the storage unit 61 (for example, every 30 seconds).
  • the controller 60 determines that the flow rate reduction state has continued for a set time T1 (180 seconds) or more and that the water heater 30 has stopped operating, the operation stop stored in the storage unit 61 is stopped.
  • the previous detected flow rate for 10 times is separately recorded in the storage means 61 as abnormal data (step S4). That is, in the first embodiment, the control means 60 and the storage means 61 function as the recording means of the present invention.
  • the control unit 60 determines whether or not the water flow is stopped according to the duration of the flow rate decrease state. It is possible to suppress erroneous detection of water stoppage by determining that the lowered state is water stoppage. If the flow rate is temporarily reduced, it is not determined that the water supply has stopped. Therefore, even if a temporary flow rate drop occurs within a range where the pump used in the hot water storage system 100 does not fail, the water heater 30 is operated without any trouble thereafter. it can. In addition, when the flow rate detection unit 40 detects the flow rate drop, the control unit 60 appropriately detects whether or not there is a water breakage abnormality according to the duration for which the flow rate drop is detected. It is possible to detect a water outage abnormality.
  • the flow rate detected by the flow rate detection means 40 before the stop is recorded as abnormal data. For this reason, the person in charge of maintenance can confirm later whether the cause of the abnormal stop of the heat pump water heater is water stop, and the cause analysis of the abnormal stop becomes easy.
  • Embodiment 2 the operation example in which the operation of the water heater 30 is stopped when the water break abnormality is detected has been described.
  • the configuration related to the conveyance of water to the water heater 30 may be a cause of the water failure. If the operation of the water heater 30 is stopped in such a case, the operation of storing hot water in the hot water tank 1 is stopped, so that hot water runs out and the user may feel inconvenience.
  • the cause of the water cutoff abnormality is that the water level in the hot water storage tank 1 is lower than the connection part of the water inflow pipe 31 or the valve element 33 is broken, the operation of the water heater 30 itself is There is no problem, and if the water supplied from the water receiving tank 3 is supplied to the water heater 30, the water heater 30 may operate without any problem.
  • FIG. 6 is a piping circuit diagram showing hot water storage system 100 according to Embodiment 2 of the present invention.
  • the water level 70 in the hot water tank 1 is illustrated for the sake of explanation, but the configuration of the hot water storage system 100 shown in FIG. 6 is the same as that in FIG. A detector 2 is also provided.
  • FIG. 7 is a flowchart for explaining the operation of the water heater 30 according to Embodiment 2 of the present invention.
  • the control means 60 of the second embodiment circulates water between the hot water heater 30 (refrigerant-water heat exchanger 52) and the hot water tank 1 as the operation mode of the hot water heater 30 as in the first embodiment. At least two operation modes: a circulation mode in which the water is heated and a hot water storage mode in which the hot water heated by the water heater 30 is stored in the hot water tank 1.
  • a circulation mode in which the water is heated a hot water storage mode in which the hot water heated by the water heater 30 is stored in the hot water tank 1.
  • step S10 the control means 60 determines whether the operation mode is the circulation mode, in other words, whether the operation mode is the hot water storage mode (step S11). If the water heater 30 is in the circulation mode (S11; Yes), the process proceeds to step S15. If the water heater 30 is in the hot water storage mode (S11; No), the process proceeds to step S12.
  • step S12 when the flow rate detection unit 40 detects the flow rate drop, the control unit 60 determines whether or not the flow rate drop state continues for a set time T1 (180 seconds in the present embodiment) or more.
  • the control means 60 does not determine that the water supply is abnormal and returns to step S10 and continues the operation as it is.
  • the flow rate reduction state continues for the set time T1 (180 seconds) or longer (S12; No)
  • step S13 the control means 60 informs the notification means 62 that a water stop abnormality has been detected. Moreover, in order to protect apparatuses, such as the feed pump 36 and the compressor 51, the control means 60 stops these apparatuses. As a stopping method, a command may be directly output from the control means 60 to each device, or may be stopped via another device.
  • the compressor 51 can be provided with a high-pressure shut-off device, and the compressor 51 can be stopped via the high-pressure shut-off device.
  • the operation of the water heater 30 is stopped as in the first embodiment.
  • the storage unit 61 periodically stores the flow rate of water flowing through the refrigerant-water heat exchanger 52 (for example, every 30 seconds). For example, the detected water flow rate for 10 times before stopping the operation of the water heater 30 stored in the storage unit 61 is separately recorded in the storage unit 61 as abnormal data (step S14). That is, in the second embodiment, the control means 60 and the storage means 61 function as the recording means of the present invention.
  • step S15 when the flow rate detection unit 40 detects the flow rate drop, the control unit 60 determines whether or not the flow rate drop state continues for the set time T1 (180 seconds). When the duration of the flow rate reduction state is less than the set time T1 (180 seconds) (S15; Yes), the control means 60 returns to step S10 and continues the operation as it is without determining that the water supply is abnormal. On the other hand, when the flow rate reduction state continues for the set time T1 (180 seconds) or longer (S15; No), the process proceeds to step S16.
  • step S16 the control means 60 informs the notification means 62 that a water stop abnormality has been detected during operation in the circulation mode. Moreover, in order to protect equipment, such as the feed pump 36 and the compressor 51, the control means 60 stops operation
  • a command may be directly output from the control means 60 to each device, or may be stopped via another device.
  • the compressor 51 can be provided with a high-pressure shut-off device, and the compressor 51 can be stopped via the high-pressure shut-off device.
  • the storage unit 61 periodically stores the flow rate of water flowing through the refrigerant-water heat exchanger 52 (for example, every 30 seconds). For example, the detected water flow rate for 10 times before stopping the operation of the water heater 30 stored in the storage unit 61 is separately recorded in the storage unit 61 as abnormal data (step S17).
  • step S17 the control means 60 stands by until a standby time T2 (for example, 200 seconds) elapses, and thereafter, the operation is not permitted for the circulation mode, but the operation is permitted and started for the hot water storage mode ( The process proceeds to step S18) and step S19.
  • a standby time T2 for example, 200 seconds
  • movement in circulation mode is maintained.
  • the value of the waiting time T2 in step S18 (200 seconds) is an example, and the equipment (for example, the water supply pump 36 and the compressor 51) heated due to the occurrence of a water shutoff is cooled to a temperature at which there is no operational problem. Set the time to be played.
  • step S19 while executing the operation in the hot water storage mode, the control unit 60 determines whether or not the flow rate reduction state continues for 180 seconds when the flow rate detection unit 40 detects the flow rate reduction. If the detection time of the flow rate reduction state is less than the set time T1 (180 seconds) (S19; Yes), the control means 60 does not determine that the water supply is abnormal and continues the operation in the hot water storage mode in step S19. On the other hand, when the flow rate reduction state continues for the set time T1 (180 seconds) or longer (S19; Yes), the control means 60 determines that a water-breaking abnormality has occurred, and proceeds to step S13.
  • the control unit 60 determines whether or not the water is shut off according to the duration of the flow rate decrease state. Therefore, the same effect as in the first embodiment can be obtained.
  • the hot water storage operation mode in which hot water heated by the hot water heater 30 is stored in the hot water storage tank 1 can be executed. For this reason, for example, when there is a shortage of water in the hot water tank 1 or when there is a defect in the water transfer path from the hot water tank 1 to the hot water heater 30, the hot water tank 1 is heated without stopping the operation of the hot water heater 30.

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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)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

La présente invention se rapporte à un dispositif d'alimentation en eau chaude de pompe à chaleur qui comprend : un dispositif de cycle de pompe à chaleur (50), où au moins un compresseur (51), un échangeur de chaleur réfrigérant-eau (52), un dispositif de décompression (53) et un évaporateur (54) sont raccordés par une canalisation, la chaleur étant échangée entre le réfrigérant et l'eau dans l'échangeur de chaleur réfrigérant-eau (52); un moyen de détection de volume d'écoulement (40) qui détecte le volume d'écoulement de l'eau qui circule à travers l'échangeur de chaleur réfrigérant-eau (52); et un moyen de commande (60) qui commande le fonctionnement du dispositif de cycle de pompe à chaleur (50). Lorsqu'un état dans lequel le volume d'écoulement de l'eau, détecté par le moyen de détection de volume d'écoulement (40) est inférieur à une valeur de seuil, continue pendant une période de temps égale ou supérieure à un temps (T1) déterminé, le moyen de commande (60) détermine qu'une erreur d'arrêt de la distribution d'eau s'est produite et arrête le fonctionnement du dispositif de cycle de pompe à chaleur (50).
PCT/JP2013/062452 2013-04-26 2013-04-26 Dispositif d'alimentation en eau chaude de pompe à chaleur et système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur WO2014174678A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2013/062452 WO2014174678A1 (fr) 2013-04-26 2013-04-26 Dispositif d'alimentation en eau chaude de pompe à chaleur et système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur
EP13883242.3A EP2990736B1 (fr) 2013-04-26 2013-04-26 Système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur
JP2015513470A JP5972456B2 (ja) 2013-04-26 2013-04-26 ヒートポンプ給湯機及びヒートポンプ給湯機を備えた貯湯システム

Applications Claiming Priority (1)

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PCT/JP2013/062452 WO2014174678A1 (fr) 2013-04-26 2013-04-26 Dispositif d'alimentation en eau chaude de pompe à chaleur et système de stockage d'eau chaude pourvu du dispositif d'alimentation en eau chaude de pompe à chaleur

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CN108113451A (zh) * 2016-11-30 2018-06-05 佛山市顺德区美的电热电器制造有限公司 烹饪设备及其控制方法和其控制装置
JP2023022399A (ja) * 2021-08-03 2023-02-15 有限会社アクアテック 凝縮器の補助冷却装置

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JP2018096654A (ja) * 2016-12-16 2018-06-21 パナソニックＩｐマネジメント株式会社 温水暖房装置
ES2735648B2 (es) * 2018-06-19 2020-05-20 Sedal S L U Dispositivo de mezcla de liquidos con control electronico de alta dinamica de regulacion y metodo de funcionamiento del mismo

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JPH07229653A (ja) 1994-02-17 1995-08-29 Sanyo Electric Co Ltd 水冷式冷却装置
JP2004333051A (ja) 2003-05-09 2004-11-25 Matsushita Electric Ind Co Ltd 給湯機
JP2006274873A (ja) * 2005-03-29 2006-10-12 Noritz Corp 熱回収装置、並びに、コージェネレーションシステム
JP2009257707A (ja) * 2008-04-18 2009-11-05 Mitsubishi Electric Corp 貯湯式給湯機
JP2011220676A (ja) * 2011-07-06 2011-11-04 Mitsubishi Electric Corp ヒートポンプ給湯機
WO2012049820A1 (fr) * 2010-10-14 2012-04-19 三菱電機株式会社 Appareil à cycle de réfrigération

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JPH07229653A (ja) 1994-02-17 1995-08-29 Sanyo Electric Co Ltd 水冷式冷却装置
JP2004333051A (ja) 2003-05-09 2004-11-25 Matsushita Electric Ind Co Ltd 給湯機
JP2006274873A (ja) * 2005-03-29 2006-10-12 Noritz Corp 熱回収装置、並びに、コージェネレーションシステム
JP2009257707A (ja) * 2008-04-18 2009-11-05 Mitsubishi Electric Corp 貯湯式給湯機
WO2012049820A1 (fr) * 2010-10-14 2012-04-19 三菱電機株式会社 Appareil à cycle de réfrigération
JP2011220676A (ja) * 2011-07-06 2011-11-04 Mitsubishi Electric Corp ヒートポンプ給湯機

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Publication number Priority date Publication date Assignee Title
CN108113451A (zh) * 2016-11-30 2018-06-05 佛山市顺德区美的电热电器制造有限公司 烹饪设备及其控制方法和其控制装置
JP2023022399A (ja) * 2021-08-03 2023-02-15 有限会社アクアテック 凝縮器の補助冷却装置

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EP2990736A4 (fr) 2016-11-30
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EP2990736A1 (fr) 2016-03-02
JP5972456B2 (ja) 2016-08-17

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