US20110259560A1 - Hot water storage type hot water supply device - Google Patents

Hot water storage type hot water supply device Download PDF

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Publication number
US20110259560A1
US20110259560A1 US12/674,364 US67436408A US2011259560A1 US 20110259560 A1 US20110259560 A1 US 20110259560A1 US 67436408 A US67436408 A US 67436408A US 2011259560 A1 US2011259560 A1 US 2011259560A1
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US
United States
Prior art keywords
hot water
water storage
storage tank
bypass path
backflow preventing
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
US12/674,364
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English (en)
Inventor
Takeyoshi Kinoshita
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.)
Daikin Industries Ltd
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Daikin Industries Ltd
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Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KINOSHITA, TAKEYOSHI
Publication of US20110259560A1 publication Critical patent/US20110259560A1/en
Abandoned 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • 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
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/083—Venting arrangements
    • 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
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters

Definitions

  • This invention relates to a hot water storage type hot water supply device.
  • FIG. 5 is a configural diagram showing embodiments of a hot water storage type hot water supply device of this invention, but the prior art will be described with reference to this diagram.
  • the hot water storage type hot water supply device is, as shown in the same diagram, equipped with a heat pump unit 1 that serves as one example of a heating component, a hot water storage tank 2 that stores warm water that has been heated by the heat pump unit 1 , a heat exchange component 3 for reheating that exchanges heat between the warm water that has been supplied from the hot water storage tank 2 and hot water inside a tub 4 , and a control device 10 .
  • One end of a pipe 31 is connected to an input side of the heat pump unit 1 , and the other end of the pipe 31 is connected to a lower side of the hot water storage tank 2 .
  • one end of a pipe 32 is connected to an output side of the heat pump unit 1 , and the other end of the pipe 32 is connected to an upper side of the hot water storage tank 2 .
  • a pump 11 is installed in the pipe 31 , and the warm water (or water) inside the hot water storage tank 2 is circulated by the pump 11 via the pipe 31 , the heat pump unit 1 and the pipe 32 .
  • a water supply pipe 33 is connected to the lower side of the hot water storage tank 2 , and one end of a water supply pipe 34 is connected to that water supply pipe 33 .
  • the other end of this water supply pipe 34 is connected to one input of a mixing valve 25 , and the other input of the mixing valve 25 is connected to the upper side of the hot water storage tank 2 via a hot water supply pipe 35 .
  • the upper side of the hot water storage tank 2 and a primary upper side connection port on an upper side of the heat exchange component 3 are interconnected via a pipe 36
  • the lower side of the hot water storage tank 2 and a primary lower side connection port on a lower side of the heat exchange component 3 are interconnected via a pipe 37
  • the primary upper side connection port and the primary lower side connection port are communicated with a primary flow path in the heat exchange component 3 .
  • a pump 12 is installed in the pipe 37 , and the warm water inside the hot water storage tank 2 is circulated by the pump 12 via the pipe 36 , the heat exchange component 3 and the pipe 37 .
  • a secondary lower side connection port on the lower side of the heat exchange component 3 and a circulation opening 20 in the tub 4 are interconnected via a pipe 38
  • a secondary upper side connection port on the upper side of the heat exchange component 3 and the circulation opening 20 in the tub 4 are interconnected via a pipe 39 .
  • the secondary lower side connection port and the secondary upper side connection port are communicated with a secondary flow path in the heat exchange component 3 .
  • a pump 13 is installed in the pipe 38 , and the hot water inside the tub 4 is circulated by the pump 13 via the pipe 38 , the heat exchange component 3 and the pipe 39 . Because the hot water inside the tub 4 circulates via the secondary side of the heat exchange component 3 , the hot water inside the tub 4 is heated by heat exchange with the warm water that is supplied from the inside of the hot water storage tank 2 .
  • a water level sensor 21 that serves as one example of a hot water quantity sensor that detects the water level inside the tub 4 and a temperature sensor 22 for detecting the temperature of the hot water inside the tub 4 .
  • a hot water supply pipe 40 is connected to an outlet of the mixing valve 25 , and the other end of that hot water supply pipe 40 is connected to the pipe 39 .
  • a flow rate sensor 23 for detecting the quantity of the hot water supply
  • a temperature sensor 24 for detecting the temperature of the hot water supply.
  • a warm water supply component is configured by the water supply pipes 33 and 34 , the mixing valve 25 and the hot water supply pipes 35 and 40 . The warm water inside the hot water storage tank 2 is pushed up by the water supply from the water supply pipe 33 , and high-temperature water in the upper portion inside the hot water storage tank 2 is pushed out and supplied from the hot water supply pipe 35 .
  • the heat pump unit 1 is equipped with a refrigerant circuit in which a compressor, a condenser (water heater), expansion means and an evaporator are annularly connected, and the warm water that has been circulated by the pump 11 is heated utilizing heat that is generated by the condenser.
  • the temperature of the high-temperature water that is supplied to the upper portion inside the hot water storage tank 2 by the heat pump unit 1 is set to 80° C.
  • a relief valve is disposed in the top portion of the hot water storage tank 2 in order to prevent the warm water from expanding at the time of boiling operation and the internal pressure of the hot water storage tank 2 from rising. Further, an air purge valve for purging stored air is attached in the vicinity of the top portion of the hot water storage tank 2 (e.g., see patent documents 1 and 2).
  • Patent Document 1 JP-A No. 2001-263791
  • Patent Document 2 JP-A No. 08-219555
  • This invention has been made in order to solve this conventional defect, and it is an object thereof to provide a hot water storage type hot water supply device that is capable of controlling a drop in energy efficiency even while activating a relief valve in the same manner as conventionally.
  • a hot water storage type hot water supply device of claim 1 is a hot water storage type hot water supply device that heats and stores, as high-temperature hot water, low-temperature water inside a hot water storage tank 2 , wherein a bypass path 41 that interconnects an upper portion and a lower portion of the hot water storage tank 2 is configured, and pressure relieving means 43 is connected to this bypass path 41 .
  • a high component positioned in a higher position than a top portion of the hot water storage tank 2 is disposed in the bypass path 41 , the high component is configured by an air reservoir component 45 , and a valve attachment opening 42 communicated with the pressure relieving means 43 is disposed in the high component or in the vicinity thereof.
  • the valve attachment opening 42 communicated with the pressure relieving means 43 it is preferable, like in claim 3 , for the valve attachment opening 42 communicated with the pressure relieving means 43 to be disposed in a higher position than the top portion of the hot water storage tank 2 .
  • a narrow component 44 whose flow path area is smaller than the flow path area of the other portions of the bypass path 41 is formed in the bypass path 41 between the air reservoir component 45 and the upper portion of the hot water storage tank 2 .
  • a heat exchange component 3 for heating hot water inside a tub 4 and a pump 12 are installed in the bypass path 41 , a communication path 46 that bypasses the narrow component 44 and the air reservoir component 45 and allows the upper portion of the hot water storage tank 2 and the bypass path 41 to be communicated with each other is disposed in the bypass path 41 , backflow preventing means 47 is installed in this communication path 46 , and this backflow preventing means 47 is configured such that it is not opened by differential pressure stemming from convection leading from the upper portion of the hot water storage tank 2 through the bypass path 41 to a bottom portion of the hot water storage tank 2 and such that it is opened by differential pressure generated by the driving of the pump 12 .
  • a second communication path 48 that bypasses the front and back of the backflow preventing means 47 is disposed, and second backflow preventing means 49 that allows air to flow from the pressure relieving means 43 to the upper portion of the hot water storage tank 2 is installed in this second communication path 48 .
  • a heat exchange component 3 for heating hot water inside a tub 4 and a pump 12 are installed in the bypass path 41
  • backflow preventing means 47 is installed in the bypass path 41 in a position closer to the upper portion of the hot water storage tank 2 than the heat exchange component 3 , and this backflow preventing means 47 is configured such that it is not opened by differential pressure stemming from convection leading from the upper portion of the hot water storage tank 2 through the bypass path 41 to a bottom portion of the hot water storage tank 2 and such that it is opened by differential pressure generated by the driving of the pump 12 .
  • the hot water storage type hot water supply device of claim 1 when the pressure inside the hot water storage tank 2 rises at the time of operation for boiling the hot water inside the hot water storage tank 2 and the pressure relieving means 43 is activated, low-temperature water inside the bypass path 41 is released to the outside. In this manner, high-temperature water is not released as has conventionally been the case, but rather low-temperature water is released, so heat release can be controlled and heat storage loss can be reduced.
  • release of the high-temperature hot water can be reliably controlled because the narrow component 44 is disposed, so device efficiency can be even more reliably improved.
  • the bypass path 41 also doubles as a configuration that is indispensable to the hot water storage type hot water supply device, so it becomes possible to significantly reduce device costs in comparison to when the bypass path 41 is configured completely separately. Further, natural convection traveling through the bypass path 41 of the high-temperature hot water inside the hot water storage tank 2 is prevented by the backflow preventing means 47 that is needed at that time, so in this respect also, it is possible to control the occurrence of energy loss.
  • air from the opposite side of the backflow preventing means 47 that is, from the pressure relieving means 43 —is allowed to flow to the hot water storage tank 2 , so when negative pressure arises inside the hot water storage tank 2 , it becomes possible to improve air intake performance.
  • the bypass path 41 also doubles as a configuration that is indispensable to the hot water storage type hot water supply device, so it becomes possible to significantly reduce device costs in comparison to when the bypass path 41 is configured completely separately. Further, natural convection traveling through the bypass path 41 of the high-temperature hot water inside the hot water storage tank 2 is prevented by the backflow preventing means 47 that is needed at that time, so in this respect also, it is possible to control the occurrence of energy loss.
  • FIG. 1 is an enlarged circuit diagram showing a relevant portion of a first embodiment of a hot water storage type hot water supply device of this invention
  • FIG. 2 is an enlarged circuit diagram showing a relevant portion of a second embodiment of the hot water storage type hot water supply device of this invention
  • FIG. 3 is an enlarged circuit diagram showing a relevant portion of a third embodiment of the hot water storage type hot water supply device of this invention.
  • FIG. 4 is an enlarged circuit diagram showing a relevant portion of a fourth embodiment of the hot water storage type hot water supply device of this invention.
  • FIG. 5 is a total circuit diagram in the first, second and fourth embodiments of the hot water storage type hot water supply device of this invention.
  • FIG. 1 is an enlarged water circuit diagram showing relevant portion A in FIG. 5 .
  • a bypass path 41 that interconnects the upper portion and the lower portion of the storage tank 2 is configured, and a valve attachment opening 42 is disposed in and a relief valve 43 is connected to this bypass path 41 .
  • the relief valve 43 configures pressure relieving means, but the relief valve 43 should be understood as configuring part of the valve attachment opening 42 .
  • the bypass path 41 is configured by the pipes 36 and 37 that are connected to the heat exchange component 3 and by an internal passage 3 a in the heat exchange component 3 .
  • the bypass path 41 is configured by an upper bypass path 41 a that is connected to the upper portion (top portion) of the hot water storage tank 2 , a narrow component 44 , an air reservoir component 45 , the pipe 36 , the internal passage 3 a in the heat exchange component 3 , and the pipe 37 that is connected to the lower portion (bottom portion) of the hot water storage tank 2 . That is, a high component positioned in a higher position than the top portion of the hot water storage tank 2 is disposed in the bypass path 41 , this high component is configured by the air reservoir component 45 , and the valve attachment opening 42 is disposed in the vicinity thereof (somewhat lower than the air reservoir component).
  • valve attachment opening 42 is disposed in a higher position than the top portion of the hot water storage tank 2 .
  • the narrow component 44 whose flow path area is smaller than the flow path area of the other portions of the bypass path 41 , is formed between the air reservoir component 45 and the upper bypass path 41 a.
  • the inside of the pipe is close to atmospheric pressure, but air inside the pipe exists in portion X and moves to portion Y at the time of water supply completion because of flowing water pressure.
  • the pressure is increased to the pressure of the relief valve 43 at a maximum, so the air volume is compressed, but it is necessary to retain air in portion Y in this state.
  • a first communication path 46 that bypasses the narrow component 44 and the air reservoir component 45 and allows the upper bypass path 41 a and the bypass path 41 (the passage 36 ) to be communicated is disposed in the bypass path 41 , and a first check valve (first backflow preventing means) 47 is installed in this first communication path 46 .
  • This first check valve 47 is configured such that it is not opened by differential pressure stemming from convection leading from the upper portion of the hot water storage tank 2 through the upper bypass path 41 a and the bypass path 41 to the hot water storage tank 2 and such that it is opened by differential pressure generated by the driving of the pump 12 .
  • “differential pressure stemming from convection” is a pressure difference arising because of a density difference between the inside of the hot water storage tank 2 and the inside of the bypass path 41 , and the water density difference is a maximum of 3.6% in the range of 0 to 90° C., so when the height of the hot water storage tank 2 is set to about 2 m, the hydraulic head becomes about 72 mm (0.72 kPa).
  • a second communication path 48 that bypasses the front and back of the first check valve 47 is disposed, and a second check valve (second backflow preventing means) 49 that allows air to flow from the pressure relieving means 43 to the upper portion of the hot water storage tank 2 is installed in this second communication path 48 .
  • the hot water storage type hot water supply device of the above-described embodiment when the pressure inside the hot water storage tank 2 rises at the time of operation for boiling the hot water inside the hot water storage tank 2 and the relief valve 43 is activated, low-temperature water inside the bypass path 41 is released to the outside. In this manner, high-temperature water is not released as has conventionally been the case, but rather low-temperature water is released, so heat release can be controlled and heat storage loss can be reduced. As a result, device efficiency can specifically be raised about 3% (specific gravity reduction of from 15° C. to 85° C.). Further, retained air is also released to the outside together with the low-temperature water, so it is not necessary to install an air purge device as has conventionally been the case, and device costs can be reduced. Further, release of the high-temperature hot water can be reliably controlled because the narrow component 44 is disposed, so device efficiency can be even more reliably improved.
  • bypass path 41 is configured by the pipes 36 and 37 that are connected to the heat exchange component 3 and by the internal passage 3 a in the heat exchange component 3 , and the bypass path 41 also doubles as a configuration that is indispensable to the hot water storage type hot water supply device, so it becomes possible to significantly reduce device costs in comparison to when the bypass path 41 is configured completely separately. Further, natural convection traveling through the bypass path 41 of the high-temperature hot water inside the hot water storage tank 2 is prevented by the first check valve 47 that is needed at that time. Consequently, in this respect also, it is possible to control the occurrence of energy loss.
  • air from the opposite side of the first check valve 47 that is, from the pressure relieving means 43 —is allowed to flow to the hot water storage tank 2 , so when negative pressure arises inside the hot water storage tank 2 (e.g., in the case of hot water supply from downstairs), air intake performance can be improved and damage to the tank 2 can be prevented.
  • FIG. 2 shows a second embodiment. This is an embodiment where installation of the second communication path 48 and the second check valve 49 in the first embodiment are omitted.
  • action and effects that are substantially the same as those in the first embodiment are obtained, with the exception of the item associated with negative pressure.
  • FIG. 3 shows a third embodiment. This is an embodiment where the bypass path 41 is disposed separately and completely independently of the bathtub heating circuit. In this case also, the action and effects of an improvement in energy efficiency resulting from outside release of low-temperature water and omission of installation of an air purge device become obtained.
  • FIG. 4 shows a fourth embodiment.
  • This is an embodiment where, in the second embodiment, installation of the narrow component 44 and the air reservoir component 45 is omitted and part of the bypass path 41 is configured by the first communication path 46 .
  • an air purge device 50 is needed, but action and effects that are substantially the same as those in the second embodiment are obtained, with the exception of the action and effects stemming from the air reservoir component 45 .
  • components having the same functions as those in the first embodiment are represented by reference numerals that are the same as those in the first embodiment and description thereof is omitted.

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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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
US12/674,364 2007-08-23 2008-08-20 Hot water storage type hot water supply device Abandoned US20110259560A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007-217282 2007-08-23
JP2007217282A JP4274273B2 (ja) 2007-08-23 2007-08-23 貯湯式給湯機
PCT/JP2008/064857 WO2009025310A1 (ja) 2007-08-23 2008-08-20 貯湯式給湯機

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US20110259560A1 true US20110259560A1 (en) 2011-10-27

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US (1) US20110259560A1 (zh)
EP (1) EP2199702B1 (zh)
JP (1) JP4274273B2 (zh)
CN (1) CN101779087B (zh)
WO (1) WO2009025310A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120255507A1 (en) * 2009-12-15 2012-10-11 Takayuki Fushiki Hot water supply system
CN104566964A (zh) * 2014-12-28 2015-04-29 广东万和电气有限公司 双模加热的热泵热水器
WO2016144372A1 (en) * 2015-03-10 2016-09-15 Copeland Joseph Heat transfer apparatus and heat transfer system for masonry heater
US10323859B2 (en) * 2016-10-27 2019-06-18 King Fahd University Of Petroleum And Minerals Water mixing system for thermoregulating water

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5556476B2 (ja) * 2010-07-28 2014-07-23 パナソニック株式会社 貯湯式給湯機
WO2012053072A1 (ja) * 2010-10-20 2012-04-26 リンナイ株式会社 貯湯式加熱ユニット
JP6551262B2 (ja) * 2016-03-02 2019-07-31 株式会社デンソー 給湯装置

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JPS55137448A (en) * 1979-04-13 1980-10-27 Hashimoto Sangyo Kk Hot water supply system
JP2001263791A (ja) * 2000-03-24 2001-09-26 Daikin Ind Ltd 給湯装置
US6536464B1 (en) * 2000-10-25 2003-03-25 Grundfos Pumps Manufacturing Corporation Thermostatically controlled bypass valve and water circulating system for same
US20090000302A1 (en) * 2007-06-28 2009-01-01 Officepower, L.L.C. Gas delivery system

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JP2006162101A (ja) * 2004-12-03 2006-06-22 Hitachi Home & Life Solutions Inc ヒートポンプ給湯装置
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Publication number Priority date Publication date Assignee Title
JPS55137448A (en) * 1979-04-13 1980-10-27 Hashimoto Sangyo Kk Hot water supply system
JP2001263791A (ja) * 2000-03-24 2001-09-26 Daikin Ind Ltd 給湯装置
US6536464B1 (en) * 2000-10-25 2003-03-25 Grundfos Pumps Manufacturing Corporation Thermostatically controlled bypass valve and water circulating system for same
US20090000302A1 (en) * 2007-06-28 2009-01-01 Officepower, L.L.C. Gas delivery system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120255507A1 (en) * 2009-12-15 2012-10-11 Takayuki Fushiki Hot water supply system
US9010281B2 (en) * 2009-12-15 2015-04-21 Hitachi Appliances, Inc. Hot water supply system
CN104566964A (zh) * 2014-12-28 2015-04-29 广东万和电气有限公司 双模加热的热泵热水器
CN104566964B (zh) * 2014-12-28 2018-03-27 广东万和电气有限公司 双模加热的热泵热水器
WO2016144372A1 (en) * 2015-03-10 2016-09-15 Copeland Joseph Heat transfer apparatus and heat transfer system for masonry heater
US10161639B2 (en) 2015-03-10 2018-12-25 Joseph Copeland Heat transfer apparatus and heat transfer system for masonry heater
US10323859B2 (en) * 2016-10-27 2019-06-18 King Fahd University Of Petroleum And Minerals Water mixing system for thermoregulating water
US11125466B2 (en) * 2016-10-27 2021-09-21 King Fahd University Of Petroleum And Minerals Water thermoregulation device having an electric heat pump
US11125467B2 (en) * 2016-10-27 2021-09-21 King Fahd University Of Petroleum And Minerals Apparatus for water temperature regulation

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JP4274273B2 (ja) 2009-06-03
JP2009052758A (ja) 2009-03-12
WO2009025310A1 (ja) 2009-02-26
CN101779087A (zh) 2010-07-14
EP2199702A1 (en) 2010-06-23
EP2199702A4 (en) 2014-11-05
CN101779087B (zh) 2013-07-10
EP2199702B1 (en) 2017-03-08

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Owner name: DAIKIN INDUSTRIES, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KINOSHITA, TAKEYOSHI;REEL/FRAME:023965/0053

Effective date: 20081128

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION