WO2006074572A1 - Distributeur d'eau chaude et froide et procede de commande de ce dernier - Google Patents

Distributeur d'eau chaude et froide et procede de commande de ce dernier Download PDF

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Publication number
WO2006074572A1
WO2006074572A1 PCT/CN2005/000035 CN2005000035W WO2006074572A1 WO 2006074572 A1 WO2006074572 A1 WO 2006074572A1 CN 2005000035 W CN2005000035 W CN 2005000035W WO 2006074572 A1 WO2006074572 A1 WO 2006074572A1
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WO
WIPO (PCT)
Prior art keywords
hot
cold water
water tank
hot water
water
Prior art date
Application number
PCT/CN2005/000035
Other languages
English (en)
Inventor
Guoxin Yu
Yuuichi Yakumaru
Tetsuya Saito
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to PCT/CN2005/000035 priority Critical patent/WO2006074572A1/fr
Priority to CN200580001698.8A priority patent/CN1969153A/zh
Publication of WO2006074572A1 publication Critical patent/WO2006074572A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/24—Refrigeration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator

Definitions

  • the present invention relates to a hot and cold water ' dispenser for supplying hot water and/or cold water and, in particular, to a s . mall-sized hot and cold water dispenser capable 1 Of supplying hot water of a high temperature.
  • the present invention relates also to a- method of controlling such a hot and cold water dispenser.
  • hot and cold water dispenser capable of making both hot
  • This conventional- hot and cold water dispenser makes use of R134a or R600a as a refrigerant in the refrigerating cycle and is provided with a hot water tank accommodating a condenser and a cold water tank aocommodating an evaporator.
  • a hot water tank accommodating a condenser and a cold water tank aocommodating an evaporator.
  • water in the hot water tank is heated with the condenser, while water in the cold ' .water tank is cooled with the evaporator.
  • an auxiliary heater is accommodated in the hot water tank.
  • the use of heat of condensation of the i refrigerating ' cycle in making the hot water enhances the thermal efficiency and reduces the electrical power consumption, . compared ' with the use of only the electric heater.
  • the R134a refrigerant is not a natural chemical substance, it is relatively costly and exerts a harmful influence on the environment.
  • the R600a refrigerant is a natural chemical substance, but it is high in inflammability and has a possibility of explosion when leaking into the i • atmosphere. Accordingly, the use of this refrigerant entails any possible safety precautions, resulting in a high cost..
  • the present invention has been developed to overcome the above-described disadvantages.
  • the . hot and cold water dispenser includes a . compressor, a radiator, a pressure-reducing mechanism, and an evaporator all connected in series to define a refrigerating cycle, in which a refrigerant that operates in a supercritical state is filled.
  • the hot and cold water dispenser also includes ⁇ a hot water dispenser for supplying hot water that is heated by the radiator and a cold water dispenser for supplying cold water that is cooled by the evaporator.
  • both cold water and hot water of a high temperature can be obtained by operating the refrigerating cycle, and the electrical power consumption can be reduced.
  • carbon dioxide be used as the refrigerant, making it possible to reduce the load to the environment and to obtain hot water of a higher temperature.
  • the hot water dispenser may include a hot water ,tank having the radiator accommodated therein, while the cold water dispenser may include a cold water tank having the evaporator accommodated therein.
  • the hot and cold water dispenser can be used as both a cold water reservoir and a hot water reservoir, the utility thereof is enhanced.
  • a feed water tank for supplying water to the hot water tank and the cold water tank is provided, water other than tap water can be used.
  • the present invention can provide a hot and cold water dispenser capable of supplying cold water and hot water of a high temperature by making use of a refrigerating cycle in which a refrigerant that is inexpensive, safe, and gentle with the environment is used.
  • Fig. 1 is a refrigerating cycle of a hot and cold water dispenser according a first embodiment of the present invention
  • Fig. 2 is a Mollier diagram schematically showing the operation of the refrigerating cycle of the hot and cold water dispenser of Fig. 1 ; ⁇ .
  • Fig. 3 is a refrigerating cycle of a hot and cold water dispenser according a second embodiment of the present invention; '
  • Fig. 4 is a flowchart showing a control method for the hot and cold water dispenser of Fig. 3;
  • Fig. 5 is a refrigerating cycle of a modification of the hot and cold water dispenser of Fig. 3;
  • Fig. 6 is a flowchart showing a- control method for the hot and cold water dispenser of Fig. 5;
  • Fig. 7 is a refrigerating cycle of a hot and cold water dispenser according a third, embodiment of the present invention.
  • Fig. 8A is a flowchart showing a hot water control method for the hot and cold water dispenser of Fig. 7;
  • Fig. 8B is a flowchart showing a cold water control method for the hot and cold water dispenser of Fig. 7;
  • Fig. 9 is a refrigerating cycle of a modification of the hot and cold water
  • Fig. 1 OA is a flowchart showing a hot water ' control method for the hot and cold water dispenser of Fig. 9;
  • Fig. 10B is a flowchart showing a cold water control rhethod for the- hot and cold water dispenser of Fig. 9;
  • Fig. 11 is a refrigerating cycle of another modification of the hot and cold water dispenser of Fig. 7;
  • Fig. 12 is a flowchart showing a control method for the hot and cold water dispenser of Fig. 11. Detailed Description of the Preferred Embodiments Embodiment 1.
  • Fig. 1 depicts a refrigerating cycle of a hot and cold water dispenser according to a first embodiment of the present invention.
  • the. refrigerating cycle is . constituted by a compressor 1 , a radiator 2, a pressure-reducing mechanism- 3, and an evaporator 4, all connected in series by piping.
  • the refrigerating cycle is filled with carbon dioxide (CO 2 ) as a refrigerant.
  • An expansion valve or a capillary tube is preferably used for the pressure-reducing mechanism 3.
  • the radiator 2 is accommodated in a hot water tank 5, while the evaporator 4 is accommodated in a cold water tank 6.
  • the hot water tank 5 has a feed water line 7 connected thereto, and the cold water tank 6 similarly has a feed water line 8 connected thereto. Both the feed water lines 7, 8 are connected to a water service piping 9 and have respective valves 12, 13 attached thereto!
  • the hot water tank 5 also has a hot water tap 10 for supplying hot water therethrough, and the cold water tank 6 similarly has a cold water tap 11 for supplying cold water therethrough.
  • Fig. 2 depicts a Mollier diagram (pressure-enthalpy diagram) schematically showing the operation of the refrigerating cycle of the hot and cold water dispenser according to the first embodiment of the present invention.
  • the evaporator 4 operates in a zone of wet vapor under a saturated liquid line 20 and a saturated vapor line 21 , while the radiator 2 operates in a supercritical state over a critical point 22.
  • the operation of the hot and cold water ' dispenser of the above-described construction is discussed hereinafter with reference to Figs. 1 and 2.
  • a gaseous high-temperature refrigerant compressed by the compressor 1 is introduced into the radiator 2 accommodated in the hot water tank 5 to heat water in the hot water tank 5.
  • the refrigerant is then reduced in pressure to
  • the pressure-reducing mechanism 3 can render the pressure in the evaporator 4 to be about 3 to 4 MPa and the pressure in the radiator 2 to be about 10 to 12 MPa. Accordingly, the compression ratio is not too high, making it possible to operate the compressor 1 without spoiling the reliability thereof. Also, because the radiator 2 operates in the supercritical state, the temperature of the refrigerant at the inlet of the .radiator 2 is high of being about 100 0 C. For this reason, the temperature of the hot water in. the hot water tank 5 can be readily increased up to about 8O 0 C to 90 0 C, enabling high-temperature water supply.
  • each of the hot water tap 10, the cold water tap 11 , and the valves 12, 13 is comprised of a solenoid valve, and each of the hot water
  • ⁇ S tank 5 and the cold water tank .6 accommodates a known level detector (not shown) such as, for example, a float switch for detecting water level in the tank 5, 6 and for outputting the detected water level.
  • the solenoid valves and the level detectors together with the compressor ⁇ 1 ⁇ and the pressure-reducing mechanism 3 are all electrically connected to a controller 14, which outputs electric signals to control them.
  • a hot water supply button and a cold water supply button both mounted on the body of the hot and cold water dispenser are also connected to the controller 14 to selectively open or close the hot water tap 10 and the cold water tap 11 , respectively.
  • the valves 12, 13 can be operated depending on the water level in the hot water tank 5 and that in the cold water tank 6, respectively, so that tap water may be automatically supplied to the hot water tank 5 and the cold water tank 6 from the water service piping ,9.
  • the operation of the refrigerating cycle can be interlocked with the action of the valves 12, 13 for automatic heating or cooling operation of the hot and cold water dispenser.
  • Fig. 1 depicts the case where water is supplied to the hot water tank 5 and the cold water tank 6 from the water service piping 9, a separate feed water tank may be provided to supply water to the hot water tank 5 and the cold water tank 6. • Ih this case, commercially available water other than tap water can be used, making it possible to. supply potable hot and cold water most suitable for health.
  • Fig. 3 depicts a refrigerating cycle of a hot and cold water dispenser ⁇ according to a second embodiment of the present invention
  • Fig. 4 depicts a flowchart showing. a method of controlling the same.
  • Fig. 3 The construction shown in Fig. 3 is the same as that shown in Fig. 1 in the refrigerant to be used in the refrigerating cycle and the like, but differs therefrom in the following points.
  • a feed water tank 30 is connected to both the feed water lines 7, 8 constituting first and second water supply lines, respectively.
  • the hot water tank 5 is provided with a hot water temperature detector 33 such as, for example, a thermistor accommodated therein for detecting the temperature of the hot water in the hot water tank 5.
  • the hot water tank 5 and the feed water tank 30 are mutually connected via a hot water circulating line 31 constituting a third water supply line, which returns the hot water in the hot water tank 5 to the feed water tank 30.
  • a hot water circulating pump 32 is installed on the hot water circulating line 31.
  • the hot water tank 5 accommodates a known level detector 37 such as, for example, a float switch for detecting water level in the tank 5 and for outputting the detected water level.
  • the hot water circulating pump 32, the hot water temperature detector 33, and the level detector 37 are all electrically connected to the controller 14.
  • the hot and cold water dispenser of Fig. 3 is explained hereinafter with reference to the flowchart of Fig. 4.
  • the hot water temperature detector 33 is provided in the hot water tank 5 to control the feed water operation of the hot and cold water dispenser depending on the hot water temperature detected by the hot water temperature detector 33.
  • the controller 14 determines at step S 1 whether the hot water temperature Th in the hot water tank 5 is greater than an upper limit temperature (for example, 9O 0 C), and if the former is greater than the latter, the valve 12 is opened at step S2 so that the first feed water control for feeding water of a low temperature in the feed water tank 30 is conducted.
  • an upper limit temperature for example, 9O 0 C
  • the valve 12 is opened at step S2 so that the first feed water control for feeding water of a low temperature in the feed water tank 30 is conducted.
  • step S3 a determination is made whether the temperature Th detected by the hot water temperature detector 33 is less than a set temperature (for example, 80 0 C) lower than the upper limit temperature. If the determination at step S3 is YES, the valve
  • step S4 to stop water feed from the feed water tank 30, and the ' procedure proceeds to step S5.
  • step S5 a determination is made whether the water level Hh in the hot water tank 5 detected by the level detector 37 is higher than an upper limit level. if the water level Hh is higher than the upper limit level, the hot water circulating pump 32 is operated at step S6 so that the second feed water control for returning hot water in the hot water tank 5 to the feed water tank 30 is conducted, thereby preventing an overflow from the hot water tank 5 that may be caused by water feed from the feed water tank 30 to the hot water tank 5.
  • step S7 a determination is made whether the water level Hh in the hot water tank 5 is lower than a set level that is lower than the upper limit level, and if the former is lower than the latter, the operation of the hot water circulating pump 32 is stopped at step S8, and the procedure returns to step S1.
  • step * S5 determines whether the water level Hh in the hot water 1 tank 5 is lower than or equal to the upper limit level, or if a determination has been made at step S7 that the water level Hh in the hot water tank 5 is higher than or equal to the set level.
  • the temperature 'control for the hot water tank 5 referred to above is particularly effective in the case where the operation of the refrigerating cycle is needed to make cold water in the cold water tank 6, i.e., the operation of . the compressor 1 is controlled depending on- the cold water temperature.
  • Fig. 5 depicts a modification of the hot and cold water dispenser of Fig. 3, wherein. the cold water tank 6 is provided with a cold water temperature detector ' 34 such as, for example, a thermistor accommodated therein for detecting the temperature of the cold water in the cold water tank 6, the cold water tank 6 and the feed water tank 30 are mutually connected via a cold water circulating line 35 constituting the third water supply line, which returns the cold water in the cold water tank 6 to the feed water tank 30, and a cold water circulating pump 36 is installed on the cold water circulating line 35.
  • the cold water tank 6 accommodates a known level detector 38 such as, for example, a float switch for detecting water level in the tank 6 and for outputting the detected water level.
  • the cold water circulating pump 36, the cold water temperature detector 34, and the level detector 38 are all electrically connected to the controller 14.
  • Fig. 6 depicts a flowchart showing a control method in the case where the operation of the compressor 1 is controlled depending on the hot water temperature, and this control method is explained hereinafter with reference to Figs. 5 and 6.
  • the cold water temperature detector 34 is provided in the cold water tank 6 to control ' the feed water operation of the hot and cold water dispenser depending on the cold water temperature detected by the cold water temperature detector 34.
  • the controller 14 determines at step S11 whether the cold water temperature Tc in the cold water tank 6 is less than a lower limit temperature (for example, 1 0 C), and if the former is less than the latter, the valve 13 is opened at step S12 so that the first feed water control for feeding water of a room temperature in the feed water tank 30 is conducted to increase the cold water temperature in the cold water tank 6.
  • a determination is made whether the temperature Tc detected by the cold water temperature detector 34 is greater than a set temperature (for example, 2 0 C) higher than the lower limit temperature.
  • step S13 determines whether the determination at step S13 is YES. If the determination at step S13 is YES, the valve- 13 is closed at step S14 to stop water feed from the feed water tank 3,0, and the procedure proceeds to step S15. Furthermore, if the cold water temperature Tc in the cold water tank 6 is greater than or equal to. the lower limit temperature at step S11 , or if the cold water temperature Tc detected by the cold water temperature detector 34 is less than or equal to the set temperature at step S 13, the procedure also proceeds to step S15. At step S 15, a determination is made whether the water level Hc in the cold water tank 6 detected by the level detector 38 is higher than an upper limit level.
  • the cold water circulating pump 36 is operated at step S16 so that the second feed water control for returning cold water in the cold water tank 6 to the feed water tank 30 is conducted, thereby preventing an overflow from the cold water tank 6 that may be caused by water feed from the feed water tank 30 to the cold water tank 6.
  • step S17 a determination is made whether the water level Hc in the cold water tank 6 is lower than a set level that is lower than the upper limit level, and if the former is lower than the latter, the operation of the cold water circulating pump 36 is stopped at step S18, and the procedure returns to step S11.
  • step S15 if a determination has been made at step S15 that the water level Hc in the cold water tank 6 is lower than or equal to the upper limit level, or if a determination has been'made at step S17 that the water level Hc in the cold water tank 6 is higher than or equal to the set level, the procedure also returns to step SH .
  • a relatively simple feed water control can realize a hot and cold water dispenser capable of supplying hot and cold water in a practically permissible temperature range.
  • Fig. 3 ' is intended for the hot water control
  • Fig. 5 is intended for the cold water control
  • both the hot water control and the cold water control can be conducted simultaneously.
  • only one pump can be commonly used for the hot water circulating pump 32.
  • the cold water circulating, pump 36 making it possible to simplify the piping arrangement.
  • Fig. 7 depicts a refrigerating cycle of a hot and cold water dispenser according to a third embodiment of the present invention
  • Figs. 8A and 8B depict flowcharts showing a method of controlling the same.
  • Fig. 7 The construction shown in Fig. 7 is the same as that shown in Fig. 1 in the refrigerant to ' be used in the refrigerating cycle and the like, but differs therefrom in the following points.
  • the refrigerating cycle includes a first refrigerant bypass line 41 having an auxiliary radiator 40 ' in parallel with the radiator 2 and a second refrigerant bypass line 43 having an auxiliary evaporator 42 in parallel with the evaporator 4.
  • the hot water tank 5 and the cold water tank 6 are. connected to the feed water tank 30 via the feed water lines 7, 8, respectively, and have the hot water temperature detector 33 and the cold water temperature detector 34 accommodated therein, respectively.
  • the refrigerating cycle also includes a 5 plurality of changeover valves 50, 51 , 52, 53 (hereinafter referred to simply as valves) for switching a refrigerant flow in the refrigerating cycle.
  • Fig. 8A depicts the flowchart for the hot water control . and particularly
  • the hot water temperature in the hot water tank 5 is 1 ' maintained between a first set temperature (for example, 60 0 C) and a second set temperature (for example, ' 70 0 C) higher than the first .set temperature.
  • a first set temperature for example, 60 0 C
  • a second set temperature for example, ' 70 0 C
  • the controller 14 determines whether the hot water temperature Th detected by the hot water temperature detector 33 is less than the- 15 first set temperature, and if the former is less than the latter, the valve 50 is opened and the valve 51 is closed at step S22 so that the hot water in the hot water tank 5 may be heated by the refrigerant that flows through the .radiator 2. In such a state, the refrigerating cycle is operated for a predetermined period of time, and at step S23, a determination is made whether the hot water temperature Th is greater than 20 the second set temperature.
  • the valve 50 is closed and the valve 51 is opened at step S24 so that the refrigerant may flow through the first refrigerant bypass line 41 having the auxiliary radiator 40, and the procedure returns to step S21.
  • Fig. 8B depicts the flowchart for the cold water control and particularly depicts the case where the cold water temperature in the cold water tank 6 is maintained between a third set temperature (for example, 6 0 C) and a fourth set temperature (for example, 4°C) lower than the third set temperature.
  • the controller 14 determines whether the cold' water temperature Tc detected by the cold water temperature detector 34 is greater than the third set temperature, and if the former is greater than the latter, the valve 52 is
  • the refrigerating cycle is operated for a predetermined ⁇ period of time, and at step S33, a determination is made whether the cold water temperature Tc is less than the fourth set temperature. If the cold water temperature Tc is less than the fourth set temperature, the valve 52 is closed and the valve 53 is opened at step S34
  • step S31 If a determination has been made at step S31 that the cold water temperature Tc is less than or equal to the third set temperature, the procedure proceeds to step S34, while if a determination has been made at step S33 that the cold water temperature Tc is greater than or equal to the fourth set temperature, the determination at step S33 is repeatedly carried out.
  • the hot water temperature and the cold water temperature can be controlled within respective optimum temperature ranges by controlling a refrigerant flow to the auxiliary radiator 40 or to the auxiliary evaporator 42.
  • the high pressure or the low pressure in the refrigerating cycle can be optimized.
  • the hot water temperature control and the cold water temperature control are controlled separately, the hot water temperature control and the cold water temperature control can be interlocked with each other.
  • the refrigerant flow is switched by selectively opening or closing a plurality of changeover valves, a lesser number of three-way valves or the like may be used as the changeover valves.
  • first refrigerant bypass line 41 having the auxiliary radiator 40 is provided in parallel with the radiator 2
  • second refrigerant bypass line ' 43 having the auxiliary evaporator 42 is provided in parallel with the evaporator 4, either one of the first or second refrigerant bypass line
  • Fig. 9 depicts a refrigerating cycle of a modification of the hot and cold water dispenser according to the above-described embodiment
  • Figs. 1 OA and 1 OB depict flowcharts showing a method of controlling the same.
  • the refrigerating cycle shown in Fig. 9 differs from that shown in Fig. 7 in that the former is provided with a first fan 54 for cooling the auxiliary radiator 40 and a second fan 55 for cooling the auxiliary evaporator 42.
  • Fig. 10A depicts the flowchart for the hot water control and particularly
  • the controller 14 determines whether the hot water temperature Th detected by the hot water temperature detector 33 is less than the first set temperature, and if the former is less than the latter, the valve 50 is opened and ' the valve 51 is closed at step S42 so that the hot water in the hot water tank 5 may be heated by the refrigerant that flows through the radiator 2.
  • the determination at step S41 is repeatedly carried out. In such a state, the refrigerating cycle is operated for a predetermined period of time, and at step S43, a determination is made whether the hot water temperature Th .
  • step S44 determines whether the hot water temperature Th is greater than the second set temperature. If a determination has been made at step S44 that the hot water
  • step S44 if a determination has been made at step S44 that the hot water temperature Th is less than or equal to the second set temperature, the procedure returns to step S43.
  • step S43 a determination is made at step S46 whether the valve 52 is closed and the valve 53, is opened, i.e., whether the cold water tank 6 is not being cooled because the hot water in the hot water tank 5 must be rapidly heated. If the cold water in the cold water tank 6 is being cooled, the procedure returns to step S43, and if the cold water in the ' cold water tank 6 is not being cooled, the procedure proceeds to step S47 at which the second fan 55 is operated. The operation of the second fan 55 considerably enhances the refrigerating capacity of the auxiliary evaporator 42 and, hence, the radiating capacity of the radiator 2 is similarly considerably enhanced, making it possible to rapidly heat the hot water in the hot water tank 5.
  • step S48 if a determination has been made that the hot water temperature Th is greater than the third set temperature or the cold water temperature Tc is greater than a fourth ' set. temperature (for example, 6 0 C) (the state in which the cold water tank 6 is being cooled), the operation of the second fan 55 is stopped at step S49, and the procedure returns to step S43. If a determination has been made at step S48 that the hot water temperature Th is less than or equal to the third set temperature or the cold water temperature- Tc is less than or equal to
  • Fig. 1 OB depicts the flowchart for the cold water control and particularly depicts the case where the cold water temperature in the cold water tank 6 is maintained, between a fourth set temperature (for example, 6 0 C)
  • step S51 the, controller 14 determines whether the cold water temperature Tc detected by the cold water temperature detector 34 is greater than the fourth set temperature, and if the former is greater than the latter, the valve 52 is opened and the valve 53 is closed at step S52 so that the cold water in the cold water tank 6 may be ' further cooled by the refrigerant that flows through the evaporator 4. In contrast, if the cold water temperature Tc detected by the cold water temperature detector 34 is less than or equal to the fourth set temperature, the determination at step S51 is repeatedly carried out.
  • the refrigerating cycle is operated for a predetermined period of time, and at step S53, a determination is made whether the cold water temperature Tc is greater than a sixth set temperature (for example, 1 O 0 C) that is greater than the fourth set temperature. If the cold water temperature Tc is less than or equal to the sixth set temperature, the procedure proceeds to step S54 at which a determination is made whether the cold water temperature Tc is less than the fifth set temperature.
  • a sixth set temperature for example, 1 O 0 C
  • step S54 If a determination has been made at step S54 that the ' cold water temperature Tc is less than the fifth set temperature, the valve 52 is closed and the valve 53 is opened at step S55 so that the refrigerant may flow through the second refrigerant bypass line 43 having the auxiliary evaporator 42 so as not to further cool the cold water in the cold water, tank 6, and the procedure returns to step S51. In contrast, if a determination has been made at step S54 that the cold water temperature. Tc is greater than or equal to the fifth set temperature, the procedure returns to step S53.
  • step S53 determines whether the cold water temperature Tc is greater than the sixth set ' temperature. If a determination has been made at step S53 that the cold water temperature Tc is greater than the sixth set ' temperature, a determination is made at step S56 whether the valve 50 is closed and the valve 51 is opened, i.e., whether the hot water tank 5 is not being heated because the cold water in the cold water tank 6 must be rapidly cooled. If the hot water in the hot water tank 5 is being heated, the procedure returns to step S53, and if the hot water in the hot water tank 5 is not being heated, the procedure proceeds to ' step S57 at which the first fan 54 is operated. The operation of the first fan 54 considerably enhances the
  • ⁇ radiating capacity of the auxiliary radiator 40 and, hence, the refrigerating capacity of the evaporator 4 is similarly considerably enhanced, making it possible to rapidly cool the cold water in the cold water tank 6.
  • step S58 if a determination has- been made that the cold water temperature Tc is less than the sixth set temperature or the hot water temperature Th is less than the first set temperature (the state . in which the hot water tank 5 is being heated), the operation of the first fan 54 is stopped . at step S59, and the procedure returns to step S53. If a determination has been made at step S58 that the cold water temperature Tc is . greater than or equal to the sixth set temperature or the hot water temperature Th is greater than or equal to the first set temperature, the determination at step S58 is repeatedly carried out.
  • Fig. 11 depicts a refrigerating cycle of another modification of the hot and cold water dispenser according to the above-described embodiment
  • Fig. 12 depicts a flowchart showing a method of controlling the same.
  • the refrigerating cycle shown in Fig. 11 differs from that shown in . Fig.
  • the refrigerating cycle of Fig. 11 is intended to preferentially control the cold water temperature by appropriately controlling the compressor 1 depending on the cold water temperature and to control the hot water temperature by selectively operating the auxiliary heater 54 and the auxiliary evaporator 40 provided on the first , refrigeranfrbypass line 41.
  • the flowchart of Fig. 12 shows the case where the cold water temperature in the cold water tank 6 to be preferentially controlled is maintained between a first set temperature (for example, 6°C) and a second set temperature (for example, 4°C) lower than the first set temperature, while the hot water temperature in the hot water tank 5 is maintained between a third set temperature (for example, 60 0 C) and a fourth set temperature (for example, 70 0 C) higher than the third set temperature.
  • a first set temperature for example, 6°C
  • a second set temperature for example, 4°C
  • the controller 14 determines whether the cold water temperature Tc in the cold water tank 6 is greater than the first set temperature, and if the former is greater than the latter, the refrigerating cycle is operated by operating the compressor 1 at step S62 with the auxiliary heater 54 kept off.
  • a determination is made whether the hot water temperature Th in the hot water tank 5 is- less than the third set temperature, and if the former is less than the latter, the valve 50 is opened and the valve 51 is closed at step S64 so that the hot water in the hot water tank 5 may be further heated by the refrigerant that flows through the radiator 2.
  • the refrigerating cycle is operated for a predetermined period of time, and at step S65, a determination is made whether the hot water temperature Th is greater than the fourth set temperature. If the hot water temperature Th is greater than the fourth set temperature, the valve 50 is closed and the valve 51- is opened at step S66 so that the refrigerant may flow through the .first refrigerant bypass line 41 having the auxiliary radiator 40, and the procedure proceeds to step S67.
  • step S63 If a determination has been made at step S63 that the hot water temperature Th in the hot water tank 5 is greater than or equal to the third set temperature, the procedure proceeds to step S66, while if a determination has been
  • step S65 that- the hot water temperature Th is less than or equal to the fourth set temperature, ⁇ the , procedure proceeds to step S67 at which a determination is made whether the cold water temperature Tc in the cold water tank
  • step S68 If the former is less than the latter, the operation of the compressor 1 is stopped at step S68, while if not, the procedure returns to step S63.
  • step S61 if a. determination has been made at step S61 that. the cold water temperature Tc in the cold water tank 6 is less than. or equal to the first set temperature, the operation of the compressor 1 is also stopped at step S68.
  • step S69 a determination is made whether the hot water temperature Th in the hot water tank 5 is less than the third set temperature, and if the former is less than the latter, the auxiliary heater 54 is operated at step S70 and the procedure returns to step S61.
  • step S69 if a determination has been made at step S69 that the hot water temperature Th in the hot water tank 5 is greater than or equal to the third set temperature, the procedure also returns to step S61.
  • the cold water temperature in the cold -water tank 6 and the hot water temperature in the hot water tank 5 can be both appropriately controlled by the ON/OFF control of the compressor 1 , the ON/OFF control of the auxiliary heater 54, and the opening and closing control of the refrigerant passage changeover valves 50, 51.
  • the present invention can provide a hot and cold water dispenser capable of supplying cold water and hot water of a high temperature by making use of a refrigerating cycle in which a refrigerant that is inexpensive, safe, and gentle with the environment is used.
  • the hot and cold water dispenser according to the present invention is also superior in power-saving nature and is, hence, useful as a hot and cold water dispenser for domestic or business use.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

L'invention concerne un distributeur d'eau chaude et froide. Ledit distributeur comprend un compresseur (1), un radiateur (2), un mécanisme de réduction de pression (3), ainsi qu'un évaporateur (4), tous reliés en série afin de définir un cycle de réfrigération, dans lequel est rempli un fluide frigorigène qui fonctionne dans un état supercritique. Le radiateur (2) est logé dans un réservoir d'eau chaude (5), tandis que l'évaporateur (4) est logé dans un réservoir d'eau froide (6).
PCT/CN2005/000035 2005-01-12 2005-01-12 Distributeur d'eau chaude et froide et procede de commande de ce dernier WO2006074572A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2005/000035 WO2006074572A1 (fr) 2005-01-12 2005-01-12 Distributeur d'eau chaude et froide et procede de commande de ce dernier
CN200580001698.8A CN1969153A (zh) 2005-01-12 2005-01-12 冷热水分配器及其控制方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000035 WO2006074572A1 (fr) 2005-01-12 2005-01-12 Distributeur d'eau chaude et froide et procede de commande de ce dernier

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WO2006074572A1 true WO2006074572A1 (fr) 2006-07-20

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2148143A2 (fr) 2008-07-21 2010-01-27 César González Valiente Appareil électrique pour chauffer de l'eau
ES2339523A1 (es) * 2008-07-21 2010-05-20 Cesar Gonzalez Valiente Electrodomestico productor de agua caliente.
ITTV20090044A1 (it) * 2009-03-17 2010-09-18 Clivet S P A Apparato di termoregolazione per sistemi di climatizzazione ambientale
ES2380735A1 (es) * 2008-12-30 2012-05-18 César González Valiente Electrodoméstico productor de agua caliente.
CN103925736A (zh) * 2014-04-03 2014-07-16 广东申菱空调设备有限公司 一种高温级热式冷热水机组及其控制方法
FR3008172A1 (fr) * 2013-07-03 2015-01-09 Jean Francois Sailhan Installation de production de froid comprenant des moyens de condensation perfectionnes etson procede de mise en oeuvre
US20210215569A1 (en) * 2015-11-10 2021-07-15 Phyn Llc Water leak detection using pressure sensing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9051162B2 (en) * 2007-09-06 2015-06-09 The Coca-Cola Company Systems and methods for facilitating consumer-dispenser interactions
JP6307028B2 (ja) * 2015-01-29 2018-04-04 ダイキン工業株式会社 空気調和装置
CN112720040B (zh) * 2020-12-04 2022-05-27 珠海格力智能装备有限公司 冷却装置及冷却控制方法

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1051971A (zh) * 1989-11-24 1991-06-05 由尼恩工业株式会社 用于调节空气和供给热/冷水的方法
JP2002089957A (ja) * 2000-09-12 2002-03-27 Sanyo Electric Co Ltd 温水・冷水供給装置
JP2004286248A (ja) * 2003-03-19 2004-10-14 Sanyo Electric Co Ltd ヒートポンプ式給湯装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051971A (zh) * 1989-11-24 1991-06-05 由尼恩工业株式会社 用于调节空气和供给热/冷水的方法
JP2002089957A (ja) * 2000-09-12 2002-03-27 Sanyo Electric Co Ltd 温水・冷水供給装置
JP2004286248A (ja) * 2003-03-19 2004-10-14 Sanyo Electric Co Ltd ヒートポンプ式給湯装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2148143A2 (fr) 2008-07-21 2010-01-27 César González Valiente Appareil électrique pour chauffer de l'eau
ES2339523A1 (es) * 2008-07-21 2010-05-20 Cesar Gonzalez Valiente Electrodomestico productor de agua caliente.
EP2148143A3 (fr) * 2008-07-21 2011-12-28 César González Valiente Appareil électrique pour chauffer de l'eau
ES2380735A1 (es) * 2008-12-30 2012-05-18 César González Valiente Electrodoméstico productor de agua caliente.
ITTV20090044A1 (it) * 2009-03-17 2010-09-18 Clivet S P A Apparato di termoregolazione per sistemi di climatizzazione ambientale
FR3008172A1 (fr) * 2013-07-03 2015-01-09 Jean Francois Sailhan Installation de production de froid comprenant des moyens de condensation perfectionnes etson procede de mise en oeuvre
CN103925736A (zh) * 2014-04-03 2014-07-16 广东申菱空调设备有限公司 一种高温级热式冷热水机组及其控制方法
US20210215569A1 (en) * 2015-11-10 2021-07-15 Phyn Llc Water leak detection using pressure sensing
US11709108B2 (en) * 2015-11-10 2023-07-25 Phyn, Llc Water leak detection using pressure sensing

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