WO2010104110A1 - 給湯システム - Google Patents

給湯システム Download PDF

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Publication number
WO2010104110A1
WO2010104110A1 PCT/JP2010/054002 JP2010054002W WO2010104110A1 WO 2010104110 A1 WO2010104110 A1 WO 2010104110A1 JP 2010054002 W JP2010054002 W JP 2010054002W WO 2010104110 A1 WO2010104110 A1 WO 2010104110A1
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WO
WIPO (PCT)
Prior art keywords
hot water
temperature
pipe
water supply
variable valve
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.)
Ceased
Application number
PCT/JP2010/054002
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
足立　郁朗
加藤　猛
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.)
Rinnai Corp
Original Assignee
Rinnai Corp
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 Rinnai Corp filed Critical Rinnai Corp
Priority to EP10750863A priority Critical patent/EP2407729A4/en
Priority to CA2754683A priority patent/CA2754683C/en
Priority to US13/254,472 priority patent/US9010280B2/en
Publication of WO2010104110A1 publication Critical patent/WO2010104110A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/523—Heat exchangers for sanitary water directly heated by the burner
    • 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
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • 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
    • F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • 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
    • F24H15/305—Control of valves
    • F24H15/325—Control of valves of by-pass 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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • 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
    • 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
    • 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/146—Connecting elements of a heat exchanger
    • 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]
    • Y02B30/12—Hot water central heating systems using heat pumps

Definitions

  • the present invention relates to a hot water supply system in which an instantaneous heating type hot water heater is connected in series on the downstream side of a hot water storage tank unit.
  • the present invention has been made in view of the above background, and an object thereof is to provide a hot water supply system configured by connecting a hot water storage tank unit and a hot water heater in series and reducing pressure loss in the flow path of hot water.
  • the present invention has been made to achieve the above object, and includes a hot water storage tank, a hot water pipe connected to the hot water storage tank, a hot water storage pipe connected to the hot water storage tank and the hot water discharge pipe, and the hot water storage tank.
  • a heating means for heating the hot water a water flow sensor for detecting water flow to the water supply pipe, a connection portion between the hot water storage tank of the hot water discharge pipe and a connection portion of the water supply pipe,
  • a hot water variable valve for changing the opening degree of the hot water pipe, and a water quantity variable valve for changing the opening degree of the water supply pipe, provided between the connecting part of the hot water storage tank and the hot water storage pipe.
  • a hot water storage temperature sensor that detects the temperature of hot water in the hot water storage tank, and hot water that is provided in the middle of the hot water discharge pipe on the downstream side of the connecting portion between the hot water discharge pipe and the water supply pipe, and flows through the hot water discharge pipe.
  • Hot water heater to be heated and hot water temperature to set the target hot water temperature
  • the present invention relates to a hot water supply system including temperature control control means for performing heating temperature control that performs heating by the water heater so that hot water at the target hot water supply temperature is supplied from the hot water discharge pipe.
  • the 1st aspect of this invention is the mixing temperature which is provided in the vicinity of the downstream of the connection part of the said hot water pipe and the said water supply pipe, and detects the temperature of the hot water supplied to the said hot water pipe from this connection part.
  • the temperature adjustment control means adjusts the mixing ratio by the hot water amount variable valve and the water amount variable valve when the heating temperature adjustment control is started, and detects the temperature detected by the mixing temperature sensor, After the first predetermined temperature is lowered over a predetermined time from the temperature obtained by subtracting the minimum capacity temperature, which is an assumed value of the temperature rise when heated by the water heater with the minimum capacity from the target hot water temperature, the hot water variable valve And the water amount variable valve is opened to the vicinity of the maximum opening.
  • the temperature control means starts the heating temperature control
  • the temperature detected by the mixed temperature sensor is a predetermined time from a temperature obtained by subtracting the minimum capacity temperature from the target hot water supply temperature. Then, the hot water variable valve and the water variable valve are opened to the vicinity of the maximum opening.
  • the temperature of the hot water supplied to the water heater is rapidly lowered and the temperature of the hot water supplied from the water heater is prevented from fluctuating, and then the hot water variable valve and the water amount variable.
  • the predetermined time is increased from the water heater by increasing the heating capacity of the water heater, following the decrease in the detected temperature of the mixed temperature sensor by the first predetermined temperature.
  • the time is set so that hot water at the target hot water supply temperature can be supplied.
  • the heating capacity of the water heater can be increased accordingly, so that the hot water supplied from the water heater is increased. It can suppress more reliably that the temperature of becomes lower than the said target hot water supply temperature.
  • a mixing unit that is provided in the vicinity of the downstream side of the connecting part between the hot water pipe and the water supply pipe and detects the temperature of hot water supplied from the connecting part to the hot water pipe.
  • a temperature sensor, and the temperature control means in the heating temperature control, when the detection temperature of the hot water storage temperature sensor is higher than the complete hot water judgment temperature set lower than the hot water judgment temperature, The hot water variable valve and the temperature are adjusted so that the detected temperature of the mixed temperature sensor is a temperature obtained by subtracting a minimum capacity temperature, which is an estimated value of a temperature increase due to heating at the minimum capacity of the water heater, from the target hot water temperature.
  • the mixing ratio is adjusted by a water amount variable valve, and when the detected temperature of the hot water storage temperature sensor is equal to or lower than the complete hot water run-off temperature, the hot water amount variable valve and the water amount variable valve are opened to a maximum opening degree. Characterized by
  • the temperature detected by the mixed temperature sensor is a temperature obtained by subtracting the minimum capacity temperature from the target hot water temperature.
  • the mixing ratio the amount of heating in the water heater can be suppressed and efficient hot water supply can be performed.
  • the temperature of the hot water in the hot water storage tank is further lowered to be equal to or lower than the complete hot water run-off temperature, the hot water volume variable valve and the water volume variable valve are opened to near the maximum opening, thereby The pressure loss of the distribution channel can be reduced.
  • a water inlet temperature sensor for detecting a temperature of water supplied from the water supply pipe to the hot water outlet pipe
  • the complete hot water run-off determination temperature is a detected temperature of the water incoming temperature sensor or the temperature The temperature is set at a second predetermined temperature higher than the detected temperature.
  • the hot water variable valve and the water variable valve are near the maximum opening. Is opened.
  • the heating temperature control can be performed while suppressing a decrease in the supply flow rate of hot water to the water heater due to pressure loss.
  • the water heater includes a heat exchanger provided in the middle of the outlet pipe, and an upstream side of the heat exchanger bypassing the heat exchanger.
  • a hot water supply bypass pipe that communicates with the hot water supply pipe on the downstream side, and a bypass variable valve that changes the opening degree of the hot water supply bypass pipe, and the temperature adjustment control means performs the mixed temperature adjustment control.
  • the bypass variable valve is opened to the vicinity of the maximum opening.
  • the bypass variable valve of the water heater when performing the mixed temperature control, is opened to the vicinity of the maximum opening, thereby reducing the pressure loss when circulating through the water heater.
  • the flow rate of hot water that can be supplied can be increased.
  • the block diagram of the hot-water supply system of this invention The operation
  • the hot water supply system of the present embodiment is configured by instantaneous heating type water heater 10, tank unit 30, and heat pump unit 60 (corresponding to the heating means of the present invention).
  • the heat pump unit 60 includes a heat pump 70 (corresponding to the heating means of the present invention) configured by connecting a compressor 71, a condenser 72, a decompressor 73, and an evaporator 74 through a refrigerant circulation path 75.
  • the condenser 72 is connected to a tank circulation path 64 connected to the upper and lower parts of the hot water storage tank 31, and exchanges heat between the refrigerant in the refrigerant circulation path 75 and the hot water in the tank circulation path 64, whereby the tank circulation path.
  • the hot water in 64 is heated.
  • the tank circulation path 64 includes a circulation pump 65 for circulating the hot water stored in the hot water storage tank 31 into the tank circulation path 64, and a forward thermistor for detecting the temperature of the hot water supplied from the condenser 72 to the hot water storage tank 31. 66 and a return thermistor 41 for detecting the temperature of the hot water supplied from the hot water storage tank 31 to the condenser 72 are provided.
  • a temperature detection signal from the forward thermistor 66 is input to the heat pump controller 80 which is an electronic unit composed of a microcomputer or the like. Further, the operation of the heat pump 70 and the circulation pump 65 is controlled by a control signal output from the heat pump controller 80.
  • the heat pump controller 80 is communicably connected to the tank controller 50, and uses the hot water storage upper limit temperature and the detected temperature data of the return thermistor 41 transmitted from the tank controller 50 when receiving the hot water heating instruction signal from the tank controller 50. Based on the detected temperature of the forward thermistor 66, the detected temperature of the return thermistor 41, and the hot water storage upper limit temperature, the circulating pump 65 and the heat pump 70 are operated to heat the hot water in the hot water storage tank 31 to the hot water storage upper limit temperature.
  • the tank unit 30 bypasses the hot water storage tank 31, the hot water pipe 2 connected to the upper part of the hot water storage tank 31, the water supply pipe 1 connected to the lower part of the hot water storage tank 31 and the hot water supply pipe 2, and the hot water heater 10.
  • the hot water supply pipe 2 is provided with the hot water supply bypass pipe 37 which connects the upstream and downstream sides of the water heater 10.
  • the tank unit 30 includes a return thermistor 41 that detects the temperature of hot water supplied from the hot water storage tank 31 to the heat pump unit 60, and a hot water storage thermistor 42 that detects the temperature of hot water stored in the hot water storage tank 31 (the hot water storage temperature of the present invention). (Corresponding to a sensor) and a hot water thermistor 33 provided in the vicinity of the upstream side of the connection point X between the tap water pipe 2 and the water supply pipe 1, and a tank water amount sensor 43 for detecting the water flow rate of the water supply pipe 1 (the present invention). The flow rate of hot water supplied from the hot water storage tank 31 to the hot water discharge pipe 2 is changed.
  • a detection signal of the water flow rate of the water supply pipe 1 by the sensor 43 is input. Further, the operation of the hot water variable valve 34, the water variable valve 35, and the bypass valve 38 is controlled by a control signal output from the tank controller 50.
  • the tank controller 50 monitors the detected temperature of the hot water storage thermistor 42, and when the detected temperature of the hot water storage thermistor 42 is equal to or lower than the preset hot water storage lower limit temperature, the tank controller 50 gives the above-mentioned hot water storage heating instruction signal to the heat pump controller 80. Send. Thus, the hot water in the hot water storage tank 31 is heated by the heat pump unit 60 to the hot water storage upper limit temperature.
  • the tank controller 50 has a desired hot water supply temperature (hot water supply set temperature: temperature of hot water supplied from the outlet of the hot water outlet pipe 2) and bath temperature (bath set temperature: hot water filling described later) according to the user's operation.
  • a temperature switch (not shown) for setting the temperature of hot water supplied to the bathtub via the pipe 18, or a general hot water supply mode (a hot water filling valve 19 described later is closed and hot water is discharged from the outlet of the hot water pipe 2.
  • a mode changeover switch (not shown) for switching between a hot water filling mode (a mode in which the hot water filling valve 19 is opened and hot water is supplied from the hot water filling pipe 18) to the bathtub.
  • 51 including the function of the target hot water supply temperature setting means of the present invention) is connected.
  • the hot water discharge pipe 2 is connected to the upper part of the hot water storage tank 31, and the water supply pipe 1 is connected to the lower part of the hot water storage tank 31. Therefore, when hot water is supplied from the hot water storage tank 31 to the hot water discharge pipe 2, water is supplied from the water supply pipe 1 to the lower part of the hot water storage tank 31 accordingly.
  • a hot water layer is formed at the top and a water layer is formed at the bottom.
  • the detected temperature of the hot water storage thermistor 42 is set to the target hot water temperature set by the remote controller 51 (in the general hot water supply mode, set by the remote controller 51. In the hot water supply set temperature and hot water filling mode, the hot water runs out below the bath set temperature set by the remote controller 51).
  • Whether the hot water storage tank 31 is in a hot water condition is determined when the detected temperature of the hot water storage thermistor 42 is equal to or lower than the hot water temperature determination temperature set near the target hot water supply temperature. What is necessary is just to judge that it is.
  • the target hot water supply temperature is set to the hot water run-off determination temperature.
  • the tank controller 50 mixes when the tank water amount sensor 43 detects water flow exceeding a predetermined lower limit flow rate. Mixed temperature control is performed to control the opening of the hot water variable valve 34 and the water variable valve 35 so that the detected temperature of the thermistor 36 or the hot water supply outlet thermistor 39 becomes the target temperature. At this time, the tank controller 50 opens the bypass valve 38 in the general hot water supply mode, and closes the bypass valve 38 in the hot water filling mode.
  • the tank controller 50 when the detected water temperature of the hot water storage thermistor 42 is equal to or lower than the target hot water supply temperature (a state where hot water has run out), when the tank water amount sensor 43 detects water flow exceeding the lower limit water amount, the tank controller 50 The valve 38 is closed to supply all hot water from the hot water storage tank 31 and the water supply pipe 1 to the water heater 10. In this case, in the water heater 10, heating temperature control described later is executed.
  • the water heater 10 bypasses the heat exchanger 11 provided in the middle of the hot water pipe 2, the burner 12 which heats the heat exchanger 11, and the heat exchanger 11, and connects the hot water pipe 2 to the heat exchanger.
  • a hot water supply bypass pipe 13 communicating between the upstream side and the downstream side, and a hot water filling pipe 18 connecting a bathtub (not shown) and the hot water supply pipe 2 on the downstream side of the connection point Z between the hot water supply pipe 2 and the hot water supply bypass pipe 13. It has.
  • the hot water discharge pipe 2 includes a bypass servo valve 14 (corresponding to a bypass variable valve of the present invention) that changes the opening degree of the hot water supply bypass pipe 13, a water amount servo 15 that adjusts the flow rate of hot water supplied to the hot water heater 10, and , A hot water supply amount sensor 21 for detecting the flow rate of hot water supplied to the heat exchanger 11 and the hot water supply bypass pipe 13, and a temperature of hot water supplied to the downstream side of the connection point Z between the hot water supply pipe 2 and the hot water supply bypass pipe 13.
  • a hot water heater thermistor 16 and a check valve 17 are provided.
  • the hot water filling pipe 18 is provided with a hot water filling amount sensor 22 for detecting the flow rate of the hot water filling pipe 18 and a hot water filling valve 19 for opening and closing the hot water filling pipe 18.
  • a temperature detection signal from the water heater thermistor 16, a water flow rate detection signal from the hot water sensor 21, and a water flow rate from the hot water sensor 22 are supplied to the hot water controller 20, which is an electronic unit composed of a microcomputer or the like.
  • the detection signal is input. Further, the operation of the bypass servo 14, the water amount servo 15, the burner 12, and the hot water filling valve 19 is controlled by a control signal output from the hot water supply controller 20.
  • the hot water supply controller 20 is communicably connected to the tank controller 50 and enters a heating permission state when receiving a signal for instructing heating from the tank controller 50.
  • the heating temperature control for controlling the combustion amount of the burner 12 so that the detected temperature of the hot water heater thermistor 16 becomes the target hot water supply temperature. Execute control. Further, when a signal for instructing heating prohibition is received from the tank controller 50, the heating prohibition state is set, and execution of the heating temperature control is prohibited.
  • the hot water supply controller 20 opens the hot water filling valve 19 when the hot water filling operation is performed to supply a predetermined amount of hot water to a bathtub (not shown) (hot water filling mode). Accumulate the amount of hot water supplied to the detected bathtub. When the cumulative amount of hot water supplied to the bathtub reaches the predetermined amount, the hot water filling valve 19 is closed to end the hot water filling operation.
  • the process proceeds to STEP 2, and the tank controller 50 fully closes the hot water variable valve 34 and fully opens the water variable valve 35 in the next STEP 3. Then, the tank controller 50 opens the bypass valve 38 in subsequent STEP4. Further, the tank controller 50 transmits a signal instructing prohibition of heating to the hot water supply controller 20 in STEP 5, thereby prohibiting execution of the heating temperature adjustment control by the water heater 10. Further, in the next STEP 6, the tank controller 50 transmits a signal for supporting the full opening of the bypass servo valve 14 to the hot water supply controller 20, whereby the bypass servo valve 14 is fully opened.
  • the tank controller 50 waits for the tank water amount sensor 43 to enter a water passage state in which water passage exceeding the lower limit flow rate is detected. Then, the process proceeds from STEP 7 to STEP 8 when the water flow state is reached. The tank controller 50 proceeds to STEP 8 until the water stop state in which the water flow exceeding the lower limit flow rate is not detected by the tank water amount sensor 43 in STEP 9. Repeat the "temperature control" subroutine.
  • the process proceeds to STEP 10, where the tank controller 50 stops the hot water variable valve 34 (holds the opening at that time), and stops the water quantity variable valve 35 in STEP 11 (at that time). Hold the opening). Further, in STEP 12, the bypass valve 38 is opened, and in STEP 13, a signal for instructing prohibition of heating is transmitted to the hot water supply controller 20.
  • the tank controller 50 transmits a signal instructing to fully open the bypass servo valve 14 to the hot water supply controller 20 in STEP 14 and returns to STEP 7.
  • the configuration in which the “temperature control” subroutine is executed in STEP 8 corresponds to the temperature control means of the present invention.
  • the tank controller 50 is in a state where the hot water storage tank 31 is out of hot water (in the general hot water supply mode, the detected temperature of the hot water storage thermistor 42 is lower than the hot water supply set temperature, in hot water filling mode, the detected temperature of the hot water storage thermistor 42 is lower than the bath set temperature. It is determined whether or not the state is. Then, when the hot water storage tank 31 is in a hot water state, the process branches to STEP 30, and when the hot water storage tank 31 is not in a hot water state, the process proceeds to STEP 22.
  • STEP22 to STEP26 are processes when the mixed temperature control is executed.
  • the tank controller 50 opens the bypass valve 38 and transmits a signal instructing prohibition of heating to the hot water supply controller 20 in subsequent STEP 23.
  • the tank controller 50 transmits a signal that instructs the hot water supply controller 20 to fully open the bypass servo valve 14. Thereby, heating by the water heater 10 is prohibited, and the bypass servo valve 14 of the water heater 10 is fully opened.
  • the pressure loss of the hot water flowing through the water heater 10 can be reduced by fully opening the bypass servo valve 14. It is not essential to fully open the bypass servo valve 14, and the effect of reducing pressure loss can be obtained by opening the bypass servo valve 14 to the vicinity of the fully open position.
  • the tank controller 50 sets the hot water supply set temperature to the mixed set temperature in the general hot water supply mode, and sets the bath set temperature to the mixed set temperature in the hot water filling mode. Then, in STEP 26, the tank controller 50 adjusts the opening amounts of the hot water variable valve 34 and the water variable valve 35 so that the detected temperature of the mixing thermistor 36 becomes the mixing set temperature, and the hot water storage tank 31 to the hot water pipe 2 is adjusted. The mixing ratio between the hot water supplied and the water supplied from the water supply pipe 1 to the hot water discharge pipe 2 is controlled by FB (feedback). Then, the process proceeds to STEP 27, where the tank controller 50 ends the “temperature control” process and proceeds to STEP 9 in FIG.
  • STEP 30 to STEP 36 are processes for executing the heating temperature control.
  • the tank controller 50 closes the bypass valve 38, and transmits a signal instructing heating permission to the hot water supply controller 20 in subsequent STEP 31.
  • the hot water controller 20 controls the burner 12 so that the temperature detected by the water heater thermistor 16 becomes the target hot water temperature (the hot water set temperature in the general hot water supply mode and the bath set temperature in the hot water filling mode).
  • the combustion amount and the opening degree of the bypass servo valve 14 are controlled.
  • the tank controller 50 first sets the mixing set temperature by the following equation (1).
  • hot water supply with a target hot water supply temperature hot water supply set temperature in the general hot water supply mode, bath set temperature in the hot water filling mode, and minimum capacity temperature: current water amount (current water flow rate detected by the hot water supply amount sensor 21) The rising temperature of hot water when heated at a minimum capacity by 10.
  • the tank controller 50 lowers the mixing set temperature calculated by the above formula (1) over a predetermined time until it reaches the mixing set temperature by the following formula (2).
  • the hot water temperature the detected temperature of the hot water thermistor 33 or the hot water storage thermistor 42
  • the incoming water temperature the detected temperature of the incoming water thermistor 44.
  • the tank controller 50 causes the hot water amount variable valve 34 and the water amount variable valve 35 so that the detected temperature of the mixing thermistor 36 becomes the mixing set temperature in STEP 33 until a predetermined time elapses in STEP 34.
  • FB feedback
  • the predetermined time in STEP 32 and STEP 34 is set to a time during which the hot water supply at the target hot water supply temperature can be maintained by increasing the heating capacity on the hot water heater 10 side following the decrease in the mixing set temperature.
  • the hot water supplied from the hot water heater 10 to the hot water pipe 2 is supplied to the hot water heater 10 from the connecting portion X between the hot water pipe 2 and the hot water pipe 1 while suppressing the temperature from becoming lower than the target hot water temperature.
  • the temperature of the hot water can be lowered to the mixing set temperature according to the above equation (2).
  • STEP 34 the process proceeds to STEP 35, where the tank controller 50 fully opens the hot water variable valve 34, and opens the water variable valve 35 fully in STEP 36. Thereby, the pressure loss in hot water variable valve 34 and water variable valve 35 is reduced, and it can control that hot water supply flow rate becomes insufficient. Then, the process proceeds to STEP 27, where the tank controller 50 ends the “temperature control” process and proceeds to STEP 9 in FIG.
  • the tank controller 50 is in a state where the hot water storage tank 31 is out of hot water (in the general hot water supply mode, the detected temperature of the hot water storage thermistor 42 is lower than the hot water supply set temperature, in hot water filling mode, the detected temperature of the hot water storage thermistor 42 is lower than the bath set temperature. It is determined whether or not the state is.
  • the process branches to STEP 50, and when the hot water storage tank 31 is not out of hot water, the process proceeds to STEP.
  • STEP42 to STEP46 are processes when the mixed temperature control is executed.
  • the tank controller 50 opens the bypass valve 38 in STEP 42 and transmits a signal instructing prohibition of heating to the hot water supply controller 20 in STEP 43 as in the processing of STEP 22 to STEP 26 in FIG. 3 of the first embodiment described above. To do.
  • the tank controller 50 transmits a signal instructing the fully opening of the bypass servo valve 14 to the hot water supply controller 20. Thereby, heating by the water heater 10 is prohibited, and the bypass servo valve 14 of the water heater 10 is fully opened.
  • the tank controller 50 sets the hot water supply set temperature to the mixed set temperature in the general hot water supply mode, and sets the bath set temperature to the mixed set temperature in the hot water filling mode. Then, in STEP 46, the tank controller 50 adjusts the opening amounts of the hot water variable valve 34 and the water variable valve 35 so that the detected temperature of the mixing thermistor 36 becomes the mixing set temperature, and from the hot water storage tank 31 to the hot water pipe 2. The mixing ratio between the hot water supplied and the water supplied from the water supply pipe 1 to the hot water discharge pipe 2 is controlled by FB (feedback). Then, the process proceeds to STEP 47, where the tank controller 50 ends the “temperature control” process and returns to STEP 9 in FIG.
  • STEP 50 to STEP 52 and STEP 60 to STEP 63 are processes for executing the heating temperature control.
  • the tank controller 50 determines whether or not the hot water storage tank 31 is in a completely hot water out condition where the temperature detected by the hot water storage thermistor 42 is equal to or lower than the complete hot water determination temperature.
  • the process branches to STEP 60, and when the hot water storage tank 31 is not in a completely hot state, the process proceeds to STEP 51.
  • the complete hot water determination temperature is set to the detection temperature of the incoming water thermistor 44.
  • the complete hot water run-off determination temperature may be set to a temperature slightly higher than the detection temperature of the incoming water thermistor 44.
  • the temperature difference between the complete hot water run-off determination temperature and the detected temperature of the incoming water thermistor 44 corresponds to the second predetermined temperature of the present invention.
  • the tank controller 50 closes the bypass valve 38 in STEP 51 and transmits a signal instructing heating permission to the hot water supply controller 20 in STEP 52.
  • all the hot water supplied from the connection part X of the hot water pipe 2 and the water supply pipe 1 is supplied to the hot water heater 10, and the detected temperature of the hot water thermistor 16 in the hot water heater 10 is set to the target hot water temperature (the hot water supply setting in the general hot water supply mode).
  • the combustion amount of the burner 12 and the opening degree of the bypass servo valve 14 are controlled (heating temperature control) so that the temperature is set to the bath setting temperature in the hot water filling mode.
  • the tank controller 50 sets the mixing set temperature by the above equation (1) and proceeds to STEP 46.
  • the hot water amount variable valve 34 and the water amount are set so that the detected temperature of the mixing thermistor 36 becomes the mixing set temperature.
  • the opening ratio of the variable valve 35 is adjusted to control the mixing ratio of hot water supplied from the hot water storage tank 31 to the hot water discharge pipe 2 and water supplied from the water supply pipe 1 to the hot water discharge pipe 2 by FB (feedback).
  • the process proceeds to STEP 47, where the tank controller 50 ends the “temperature control” process and returns to STEP 9 in FIG.
  • STEP 60 to STEP 63 are processes when the hot water storage tank 31 is in a completely hot state (a state where the temperature detected by the hot water storage thermistor 42 is equal to or lower than the complete hot water determination temperature).
  • the tank controller 50 closes the bypass valve 38 in STEP 60 and transmits a signal instructing heating permission to the hot water supply controller 20 in STEP 61.
  • all the hot water supplied from the connection part X of the hot water pipe 2 and the water supply pipe 1 is supplied to the hot water heater 10, and the detected temperature of the hot water thermistor 16 in the hot water heater 10 is set to the target hot water temperature (the hot water supply setting in the general hot water supply mode).
  • the combustion amount of the burner 12 and the opening degree of the bypass servo valve 14 are controlled (heating temperature control) so that the temperature is set to the bath setting temperature in the hot water filling mode.
  • the tank controller 50 In subsequent STEP 62, the tank controller 50 fully opens the hot water variable valve 34, and fully opens the water variable valve 35 in STEP 63. Thereby, the pressure loss in hot water variable valve 34 and water variable valve 35 is reduced, and it can control that hot water supply flow rate becomes insufficient. Then, the process proceeds to STEP 47, where the tank controller 50 ends the “temperature control” process and returns to STEP 9 in FIG.
  • the mixing set temperature is set in STEP 53 and supplied to the hot water pipe 2 from the hot water storage tank 31 in STEP 46.
  • the mixing ratio between the hot water and the water supplied from the water supply pipe 1 to the hot water discharge pipe 2 the amount of heating in the water heater 10 can be suppressed to efficiently supply hot water.
  • the hot water amount variable valve 34 is fully opened in STEP 62 and in STEP 63 By fully opening the water amount variable valve 35, the pressure loss can be reduced and the heating temperature control can be performed by the water heater 10.
  • the hot water supply system including the hot water bypass pipe 37 that bypasses the hot water heater 10 and the bypass valve 38 that opens and closes the hot water bypass pipe 37 is shown.
  • the hot water bypass pipe and the bypass valve that opens and closes the hot water bypass pipe are provided. The effect can be obtained by applying the present invention to a hot water supply system that is not provided.
  • the hot water supply system including the hot water filling pipe 18 and the hot water filling valve 19 and performing hot water supply in the general hot water supply mode and the hot water filling mode has been described.
  • the present invention can also be applied when only hot water supply is performed.
  • a hot water supply system using a heat pump as a heating means for hot water in the hot water storage tank is shown, but other heating means such as a solar system may be used.
  • the bypass servo valve 14 of the water heater 10 is fully opened to perform the process of reducing the pressure loss in the water heater 10.
  • this process is not performed, the effects of the present invention can be obtained.
  • the hot water storage tank unit and the hot water heater are connected in series, the pressure loss in the hot water distribution path can be reduced, so the hot water storage tank is provided. This is useful for configuring a hot water supply 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)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
PCT/JP2010/054002 2009-03-11 2010-03-10 給湯システム Ceased WO2010104110A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10750863A EP2407729A4 (en) 2009-03-11 2010-03-10 HOT WATER SUPPLY SYSTEM
CA2754683A CA2754683C (en) 2009-03-11 2010-03-10 Hot-water supply system
US13/254,472 US9010280B2 (en) 2009-03-11 2010-03-10 Hot-water supply system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009058222A JP5084768B2 (ja) 2009-03-11 2009-03-11 給湯システム
JP2009-058222 2009-03-11

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WO2010104110A1 true WO2010104110A1 (ja) 2010-09-16

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US (1) US9010280B2 (enExample)
EP (1) EP2407729A4 (enExample)
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CA (1) CA2754683C (enExample)
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JP5921416B2 (ja) * 2012-11-07 2016-05-24 大阪瓦斯株式会社 コージェネレーションシステム及び給湯設備
JP6147541B2 (ja) * 2013-03-29 2017-06-14 株式会社ガスター 熱源装置
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KR20110138364A (ko) 2011-12-27
CA2754683C (en) 2016-03-22
EP2407729A1 (en) 2012-01-18
US9010280B2 (en) 2015-04-21
KR101615408B1 (ko) 2016-04-25
JP2010210182A (ja) 2010-09-24
CA2754683A1 (en) 2010-09-16
EP2407729A4 (en) 2012-05-23
JP5084768B2 (ja) 2012-11-28
US20110315091A1 (en) 2011-12-29

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