US20120312045A1 - Water supply apparatus - Google Patents

Water supply apparatus Download PDF

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Publication number
US20120312045A1
US20120312045A1 US13/484,899 US201213484899A US2012312045A1 US 20120312045 A1 US20120312045 A1 US 20120312045A1 US 201213484899 A US201213484899 A US 201213484899A US 2012312045 A1 US2012312045 A1 US 2012312045A1
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United States
Prior art keywords
water
refrigerant
pipe
heat exchanger
branched
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.)
Abandoned
Application number
US13/484,899
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English (en)
Inventor
Sung Goo Kim
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, SUNG GOO
Publication of US20120312045A1 publication Critical patent/US20120312045A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F24D19/08—Arrangements for drainage, venting or aerating
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0235—Three-way-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0242—Multiple way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/02—System or Device comprising a heat pump as a subsystem, e.g. combined with humidification/dehumidification, heating, natural energy or with hybrid system
    • F24F2203/021—Compression cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus

Definitions

  • Embodiments relate to a water supply apparatus to supply cold water and/or hot water using a refrigeration cycle.
  • a water supply apparatus may be an apparatus which heats water supplied from an external water supply source to generate hot water and supplies the generated hot water to a water consumption unit such as a radiator or boiler for warming.
  • some water supply apparatuses may include refrigeration cycle components including a compressor, a condenser, an expansion valve, evaporator, etc. and thus supply both hot water and cold water by heating and/or cooling water using a refrigeration cycle.
  • a water supply apparatus which may generate hot water with a first temperature and/or hot water with a second temperature higher than the first temperature.
  • a water supply apparatus may include an outdoor unit installed outdoors, and a cascade unit to receive refrigerant from the outdoor unit and generate hot water with a first temperature and/or hot water with a second temperature higher than the first temperature.
  • the outdoor unit may include a first compressor to compress a first refrigerant and a first heat exchanger to enable the first refrigerant to exchange heat with outdoor air.
  • the cascade unit may include a second compressor to compress a second refrigerant, a second heat exchanger to enable water supplied from an external water supply source to exchange heat with the first refrigerant transferred from the outdoor unit, a third heat exchanger to enable the second refrigerant to be suctioned into the second compressor to be heated by the first refrigerant transferred from the outdoor unit, and a fourth heat exchanger to enable water supplied from the external water supply source to exchange heat with the second refrigerant discharged from the second compressor.
  • the apparatus may further include a 4-way valve disposed at a discharge side of the first compressor, a first refrigerant pipe having one end connected to the first compressor, a second refrigerant pipe having one end connected to the first heat exchanger, a first connection refrigerant pipe having one end connected to the 4-way valve and the other end connected to the first heat exchanger, a first branched refrigerant pipe branched from the other end of the first refrigerant pipe and connected to the second heat exchanger, a second branched refrigerant pipe branched from the other end of the first refrigerant pipe and connected to the third heat exchanger, a third branched refrigerant pipe branched from the other end of the second refrigerant pipe and connected to the second heat exchanger, a fourth branched refrigerant pipe branched from the other end of the second refrigerant pipe and connected to the third heat exchanger, a first 3-way valve to enable the first refrigerant pipe to communicate with any one of the first branched
  • the apparatus may further include a second discharged refrigerant pipe to guide the second refrigerant discharged from the second compressor to the fourth heat exchanger, a second suctioned refrigerant pipe to guide the second refrigerant from the third heat exchanger to be suctioned into the second compressor, a second connection refrigerant pipe to connect the third heat exchanger and the fourth heat exchanger to each other, and a third expansion valve disposed at the second connection refrigerant pipe.
  • the apparatus may further include a first water pipe supplied with water from the external water supply source, a second water pipe branched from the first water pipe to guide water to the second heat exchanger, a third water pipe branched from the first water pipe to guide water to the fourth heat exchanger, a fourth water pipe to connect to a water consumption apparatus, a fifth water pipe to guide water passing through the second heat exchanger to the fourth water pipe, a sixth water pipe to guide water passing through the fourth heat exchanger to the fourth water pipe, and a second 3-way valve disposed between the first water pipe and the second water pipe and the third water pipe so as to enable water from the first water pipe to be supplied to any one of the second and third water pipes.
  • the apparatus may further include a pump disposed at the fourth water pipe to enable water to be suctioned from the external water supply source and be discharged to the water consumption apparatus.
  • a water supply apparatus may include a first compressor to compress first refrigerant, a first heat exchanger to enable the first refrigerant to exchange heat with outdoor air, a second compressor to compress second refrigerant, a second heat exchanger to enable water supplied from an external water supply source to exchange heat with the first refrigerant, a third heat exchanger to enable the second refrigerant to be suctioned into the second compressor to be heated by the first refrigerant, and a fourth heat exchanger to enable water supplied from the external water supply source to exchange heat with the second refrigerant discharged from the second compressor.
  • the apparatus may include an outdoor unit disposed outdoors which includes the first compressor and first heat exchanger, and a cascade unit including the second compressor and the second, third and fourth heat exchangers.
  • the outdoor unit and the cascade unit may be formed as individual units and may be connected to each other via a refrigerant pipe.
  • the outdoor unit may include the cascade unit.
  • a water supply apparatus which may generate hot water with a first temperature and/or hot water with a second temperature higher than the first temperature and hence may more efficiently supply hot water of a desired temperature.
  • FIG. 1 is a schematic view illustrating a case in which hot water of a first temperature is generated by a water supply apparatus according to an embodiment
  • FIG. 2 is a schematic view illustrating a case in which hot water of a second temperature higher than the first temperature is generated by a water supply apparatus according to an embodiment
  • FIG. 3 is a schematic view illustrating a case in which cold water is supplied by a water supply apparatus according to an embodiment
  • FIG. 4 is a schematic view of a water supply apparatus according to an embodiment.
  • a water supply apparatus cools or heats water transferred from an external water supply source 30 to generate cold water or hot water and supplies the cold water or hot water into a water consumption apparatus 40 .
  • the water supply apparatus includes an outdoor unit 10 installed outdoors to exchange heat with outdoor air and a cascade unit 20 to receive first refrigerant from the outdoor unit 10 and generate cold water and hot water.
  • the cascade unit 20 is configured to generate cold water, hot water with a first temperature and/or hot water with a second temperature higher than the first temperature.
  • the outdoor unit 10 includes a first compressor 11 to compress the first refrigerant, a 4-way valve 14 installed at a discharge side of the first compressor 11 to enable selection of cold water generation or hot water generation, a first heat exchanger 12 to enable the first refrigerant to exchange heat with outdoor air, and a blowing fan 13 to enable outdoor air to pass through the first heat exchanger 12 and exchange heat with the first refrigerant.
  • the cascade unit 20 includes a second compressor 21 to compress a second refrigerant, a second heat exchanger 22 to enable the first refrigerant transferred from the outdoor unit 10 to exchange heat with water, and a third heat exchanger 23 to enable the second refrigerant to be suctioned into the second compressor 21 to exchange heat with the first refrigerant transferred from the outdoor unit 10 so that the second refrigerant to be suctioned into the second compressor 21 is heated by the first refrigerant transferred from the outdoor unit 10 .
  • the cascade unit 20 further includes a fourth heat exchanger 24 to enable water supplied from the external water supply source 30 to exchange heat with the second refrigerant discharged from the second compressor 21 .
  • the above-mentioned components may be connected to one another via a plurality of refrigerant pipes to transfer the first and second refrigerants.
  • the refrigerant pipes to transfer the first refrigerant may include a first refrigerant pipe RP 1 having one end connected to the first compressor 11 , a second refrigerant pipe RP 2 having one end connected to the first heat exchanger 12 , a first branched refrigerant pipe RP 1 - 1 branched from the other end of the first refrigerant pipe RP 1 and connected to the second heat exchanger 22 , a second branched refrigerant pipe RP 1 - 2 branched from the other end of the first refrigerant pipe RP 1 and connected to the third heat exchanger 23 , a third branched refrigerant pipe RP 2 - 1 branched from the other end of the second refrigerant pipe RP 2 and connected to the second heat exchanger 22 , a fourth branched refrigerant pipe RP 2 - 2 branched from the other end of the second refrigerant pipe RP 2 and connected to the third heat exchanger 23 , a first discharged refriger
  • the refrigerant pipes to transfer the second refrigerant may include a second discharged refrigerant pipe RP 6 to guide the second refrigerant discharged from the second compressor 21 to a fourth heat exchanger 24 , a second suctioned refrigerant pipe RP 7 to guide the second refrigerant from the third heat exchanger 23 to be suctioned into the second compressor 21 , and a second connection refrigerant pipe RP 8 to connect the third heat exchanger 23 and the fourth heat exchanger 24 to each other.
  • a first 3-way valve V 1 is disposed between the other end of the first refrigerant pipe RP 1 and the first branched refrigerant pipe RP 1 - 1 and the second branched refrigerant pipe RP 1 - 2 so as to enable the first refrigerant pipe RP 1 to communicate with a selected one of the first branched refrigerant pipe RP 1 - 1 and the second branched refrigerant pipe RP 1 - 2 .
  • the cascade unit 20 further includes a plurality of expansion valves to expand the refrigerant in a depressurized manner.
  • expansion valves include a first expansion valve 25 disposed at the third branched refrigerant pipe RP 2 - 1 , a second expansion valve 26 disposed at the fourth branched refrigerant pipe RP 2 - 2 , and a third expansion valve 27 disposed at the second connection refrigerant pipe RP 8 .
  • the cascade unit 20 further includes a plurality of water pipes constructed to allow water supplied from the external water supply source 30 to pass through the cascade unit 20 while being heated or cooled.
  • Such water pipes include a first water pipe WP 1 supplied with water from the external water supply source 30 , a second water pipe WP 2 branched from the first water pipe WP 1 to guide water to the second heat exchanger 22 , a third water pipe WP 3 branched from the first water pipe WP 1 to guide water to the fourth heat exchanger 24 , a fourth water pipe WP 4 to connect to the water consumption apparatus 40 , a fifth water pipe WP 5 to guide water passing through the second heat exchanger 22 to the fourth water pipe WP 4 , and a sixth water pipe WP 6 to guide water passing through the fourth heat exchanger 24 to the fourth water pipe WP 4 .
  • a second 3-way valve V 2 is disposed between the first water pipe WP 1 and the second water pipe WP 2 and the third water pipe WP 3 so as to enable water from the first water pipe WP 1 to be supplied to a selected one of the second and third water pipes WP 2 and WP 3 .
  • a pump 28 is disposed at the fourth water pipe WP 4 to enable water supplied from the external water supply source 30 and then passing through any one of the second and fourth heat exchangers 22 and 24 to be discharged to the water consumption apparatus 40 .
  • the first refrigerant with a high temperature discharged from the first compressor 11 passes through the first discharged refrigerant pipe RP 3 , the 4-way valve 14 , the first refrigerant pipe RP 1 , the first 3-way valve V 1 and the first branched refrigerant pipe RP 1 - 1 in this order and is transferred to the second heat exchanger 22 .
  • water supplied from the external water supply source 30 passes through, using the pump 28 , the first water pipe WP 1 , the second 3-way valve V 2 and the second water pipe WP 2 in this order and is transferred to the second heat exchanger 22 .
  • the water supplied from the external water supply source 30 and the first refrigerant with a high temperature transferred from the outdoor unit 10 may exchange heat with each other.
  • the water may be heated by the first refrigerant to become hot water with a first temperature while the first refrigerant may be cooled and condensed by the water.
  • the hot water with the first temperature generated from the second heat exchanger 22 passes through the fifth water pipe WP 5 , the pump 28 and the fourth water pipe WP 4 in this order and is transferred to the water consumption apparatus 40 .
  • the first temperature of the hot water acquired by this process may be at most 55° C.
  • the first refrigerant cooled and condensed by the water passes through the third branched refrigerant pipe RP 2 - 1 while being expanded in a depressurized manner through the first expansion valve 25 provided at the third branched refrigerant pipe RP 2 - 1 . Then, the expanded first refrigerant is transferred through the second refrigerant pipe RP 2 to the first heat exchanger 12 in which the first refrigerant is evaporated to absorb heat from outdoor air.
  • the evaporated first refrigerant from the first heat exchanger 12 passes through the first connection refrigerant pipe RP 5 and the 4-way valve 14 and the first suctioned refrigerant pipe RP 4 in this order and then is transferred again to the first compressor 11 .
  • the first refrigerant with a high temperature discharged from the first compressor 11 passes through the first discharged refrigerant pipe RP 3 , the 4-way valve 14 , the first refrigerant pipe RP 1 , the first 3-way valve V 1 and the second branched refrigerant pipe RP 1 - 2 in this order and is transferred to the third heat exchanger 23 .
  • the second refrigerant discharged from the second compressor 21 passes through the fourth heat exchanger 24 while being cooled and condensed as will be described later and thereafter passes through the second connection refrigerant pipe RP 8 and the third expansion valve 27 provided at the second connection refrigerant pipe RP 8 and then is transferred to the third heat exchanger 23 .
  • Water supplied from the external water supply source 30 passes through, using the pump 28 , the first water pipe WP 1 , the second 3-way valve V 2 and the third water pipe WP 3 in this order and is transferred to the fourth heat exchanger 24 .
  • the water cools and condenses the second refrigerant discharged from the second compressor 21 .
  • the first refrigerant transferred from the outdoor unit 10 and the second refrigerant expanded in a depressurized manner using the third expansion valve 27 exchange heat with each other.
  • the first refrigerant transferred from the outdoor unit 10 is transferred to the third heat exchanger 23 in a high temperature state resulting from compression of the first compressor 11 while the second refrigerant is transferred to the third heat exchanger 23 in an expanded and depressurized state resulting from operation of the third expansion valve 27 , the second refrigerant may be heated and evaporated by the first refrigerant whereas the first refrigerant may be cooled and condensed by the second refrigerant.
  • water supplied from the external water supply source 30 passes through, using the pump 28 , the first water pipe WP 1 , the second 3-way valve V 2 and the third water pipe WP 3 in this order and is transferred to the fourth heat exchanger 24 .
  • the water supplied from the external water supply source 30 and the second refrigerant discharged from the second compressor 21 exchange heat with each other.
  • the second refrigerant since the second refrigerant is transferred to the fourth heat exchanger 24 in a relatively higher temperature state than that of the water, the water may be heated by the second refrigerant whereas the second refrigerant may be cooled and condensed by the water.
  • the second refrigerant transferred to the fourth heat exchanger 24 since the second refrigerant transferred to the fourth heat exchanger 24 is heated by the first refrigerant transferred from the outdoor unit 10 and thereafter is again compressed by the second compressor 21 , the second refrigerant transferred to the fourth heat exchanger 24 from the second compressor 21 may heat the water transferred to the fourth heat exchanger 24 to the temperature relatively higher than the first temperature. That is, in the fourth heat exchanger 24 , the water may be heated by the second refrigerant to become hot water having the second temperature relatively higher than the first temperature.
  • the hot water with the second temperature generated from the fourth heat exchanger 24 passes through the sixth water pipe WP 6 , the pump 28 and the fourth water pipe WP 4 in this order and is transferred to the water consumption apparatus 40 .
  • the second temperature of the hot water acquired by this process may be at most 85° C.
  • the second refrigerant evaporated at the third heat exchanger 23 is transferred again to the second compressor 21 through the second suctioned refrigerant pipe RP 7 .
  • the first refrigerant cooled and condensed at the third heat exchanger 23 passes through the fourth branched refrigerant pipe RP 2 - 2 while being expanded in a depressurized manner through the second expansion valve 26 provided at the fourth branched refrigerant pipe RP 2 - 2 . Then, the expanded first refrigerant is transferred through the second refrigerant pipe RP 2 to the first heat exchanger 12 in which the first refrigerant is evaporated to absorb heat from outdoor air.
  • the evaporated first refrigerant from the first heat exchanger 12 passes through the first connection refrigerant pipe RP 5 and the 4-way valve 14 and the first suctioned refrigerant pipe RP 5 in this order and then is transferred again to the first compressor 11 .
  • the first refrigerant with a high temperature discharged from the first compressor 11 passes through the first discharged refrigerant pipe RP 3 , the 4-way valve 14 , and the first connection refrigerant pipe RP 3 in this order and is transferred to the first heat exchanger 12 .
  • This condensed second refrigerant passes through the second refrigerant pipe RP 2 and the third branched refrigerant pipe RP 2 - 1 while being expanded in a depressurized manner through the first expansion valve 25 provided at the third branched refrigerant pipe RP 2 - 1 and then is transferred to the second heat exchanger 22 .
  • Water supplied from the external water supply source 30 passes through, using the pump 28 , the first water pipe WP 1 , the second 3-way valve V 2 and the second water pipe WP 2 in this order and is transferred to the second heat exchanger 22 .
  • the depressurized and expanded first refrigerant may absorb heat from the water to be evaporated while the water may be cooled to become cold water in the second heat exchanger 22 .
  • the cold water generated from the second heat exchanger 22 passes through the fifth water pipe WP 5 , the pump 28 and the fourth water pipe WP 4 in this order and is transferred to the water consumption apparatus 40 .
  • the temperature of the cold water acquired by this process may be at least 5° C.
  • the first refrigerant evaporated by absorbing heat from the water passes through the third branched refrigerant pipe RP 2 - 1 , the first expansion valve 25 provided at the third branched refrigerant pipe RP 2 - 1 , the first branched refrigerant pipe RP 1 - 1 , the first 3-way valve V 1 , the first refrigerant pipe RP 1 , the 4-way valve 14 and the first suctioned refrigerant pipe RP 4 in this order and then is transferred again to the first compressor 11 .
  • frost may occur on the first heat exchanger 121 provided in the outdoor unit 10 in the course of generating hot water with the first or second temperature as mentioned above. At this case, heat exchange rate between the first refrigerant and outdoor air may be reduced, thereby deteriorating performance of the water supply apparatus.
  • the water supply apparatus is controlled to defrost the first heat exchanger 12 .
  • the 4-way valve 14 is controlled to guide the first refrigerant with a high temperature discharged from the first compressor 11 to the first heat exchanger 11 .
  • the first heat exchanger 11 may be defrosted using heat of the first refrigerant.
  • the first refrigerant passing through the first heat exchanger 12 may be transferred to the second heat exchanger 12 .
  • the first refrigerant may absorb heat from the water having the temperature above the predetermined temperature and thus emits more heat to the first heat exchanger 12 , resulting in rapid completion of the defrosting of the first heat exchanger 12 .
  • the temperature of the water is above the predetermined temperature as described above, the water is not prevented from being frozen although heat of the water is absorbed by the first refrigerant.
  • the water supplied from the external water supply source 30 has a temperature below a predetermined temperature, the water may be frozen when the first refrigerant absorbs heat of the water, leading to a damage of the water pipes. For this reason, when the temperature of water supplied from the external water supply source is below the predetermined temperature, the first refrigerant passing through the first heat exchanger 12 is transferred to the third heat exchanger 23 to exchange heat with the second refrigerant. In this situation, because a temperature of the second refrigerant may not be particularly high, the first refrigerant may absorb small amount of heat from the water.
  • the first refrigerant may take a relatively longer time for the first refrigerant to defrost the first heat exchanger 12 than in the case when the first refrigerant absorbs heat from the water. Nevertheless, damage of the water pipes may be prevented because the first refrigerant may not affect the temperature of the water.
  • the water supply apparatus may selectively generate hot water with a first temperature, hot water with a second temperature relatively higher than the first temperature and/or cold water. At this time, whether to generate hot water with the first temperature or hot water with the second temperature may depend on the outside temperature of the outdoor unit 10 , the temperature of water supplied from the external water supply source 30 and the temperature of water discharged to the water consumption unit 40 .
  • the outdoor unit 10 and the cascade unit 20 are formed as individual units and are connected to each other via a refrigerant pipe.
  • the outdoor unit 10 may include the cascade unit 20 . That is, the outdoor unit 10 may include the second compressor and heat exchanger 21 , 22 , the third and fourth heat exchangers 23 , 24 and the first, second and third expansion valves 25 , 26 , 27 which are included in the cascade unit 20 .
  • the 4-way valve 14 is disposed at the discharge side of the first compressor 11 to selectively enable hot water generation or cold water generation.
  • embodiments are not limited thereto.
  • the 4-way valve 14 may be dispensed with and accordingly the cold water generation may be omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
US13/484,899 2011-06-10 2012-05-31 Water supply apparatus Abandoned US20120312045A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110056037A KR20120136854A (ko) 2011-06-10 2011-06-10 급수장치
KR10-2011-0056037 2011-06-10

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US13/484,899 Abandoned US20120312045A1 (en) 2011-06-10 2012-05-31 Water supply apparatus

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US (1) US20120312045A1 (ko)
EP (1) EP2532981A3 (ko)
KR (1) KR20120136854A (ko)
CN (1) CN102818308B (ko)

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US20120192582A1 (en) * 2010-12-30 2012-08-02 Woo Hyoungsuk Heat pump interoperating hot water feeding apparatus
JP2015148426A (ja) * 2014-02-10 2015-08-20 サンデンホールディングス株式会社 ヒートポンプ式暖房装置
US20160061502A1 (en) * 2014-09-02 2016-03-03 Rheem Manufacturing Company Apparatus and method for hybrid water heating and air cooling and control thereof
US20170248349A1 (en) * 2015-01-09 2017-08-31 Trane International Inc. Heat pump
US9879881B2 (en) 2013-03-13 2018-01-30 Rheem Manufacturing Company Apparatus and methods for heating water with refrigerant from air conditioning system
US20180356130A1 (en) * 2013-03-15 2018-12-13 Trane International Inc. Cascading heat recovery using a cooling unit as a source
US20200247658A1 (en) * 2019-02-01 2020-08-06 Dongguan University Of Technology Temperature Adjusting Method for Instant Heating or Cooling with an Energy-saving Water Dispenser and Water Dispenser
US11332912B2 (en) * 2017-02-14 2022-05-17 Kwc Ag Device for dispensing hot water
US11353227B2 (en) * 2016-06-16 2022-06-07 Fläktgroup Sweden Ab Method and device for reducing or eliminating the temperature drop of the supply air temperature during defrosting of an evaporator at an air handling unit

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KR20120136854A (ko) 2012-12-20
EP2532981A2 (en) 2012-12-12

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