EP2375195A1 - Chauffe-eau du type pompe a chaleur - Google Patents

Chauffe-eau du type pompe a chaleur Download PDF

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Publication number
EP2375195A1
EP2375195A1 EP09836198A EP09836198A EP2375195A1 EP 2375195 A1 EP2375195 A1 EP 2375195A1 EP 09836198 A EP09836198 A EP 09836198A EP 09836198 A EP09836198 A EP 09836198A EP 2375195 A1 EP2375195 A1 EP 2375195A1
Authority
EP
European Patent Office
Prior art keywords
water
heat exchanger
refrigerant
water heater
heat pump
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.)
Granted
Application number
EP09836198A
Other languages
German (de)
English (en)
Other versions
EP2375195A4 (fr
EP2375195B1 (fr
Inventor
Hideki Yoshii
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2375195A1 publication Critical patent/EP2375195A1/fr
Publication of EP2375195A4 publication Critical patent/EP2375195A4/fr
Application granted granted Critical
Publication of EP2375195B1 publication Critical patent/EP2375195B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting

Definitions

  • the present invention relates to a heat pump water heater which employs a reverse-type defrosting method.
  • the present invention was made in order to solve the above problems and has a first object to obtain a heat pump water heater provided with a drain pan anti-freezing method with a smaller number of components and in a simple structure.
  • a second object of the present invention is to obtain a heat pump water heater provided with a drain pan anti-freezing method in which a discharge path of the drained water generated during the defrosting operation is not blocked and a drain reservoir is difficult to be generated.
  • a heat pump water heater is provided with a refrigerating cycle in which a compressor, a four-way valve that switches a flow direction of a refrigerant, a water heat exchanger that performs heat exchange between the refrigerant and water, an expansion mechanism that adjusts a flow rate of the refrigerant and decompresses, and an air heat exchanger that performs heat exchange between the air and the refrigerant are sequentially and circularly connected by a pipeline, a water circuit in which the water heat exchanger, a hot water tank that reserves water heated by the water heat exchanger, and a pump are sequentially and circularly connected by a pipeline, a water channel pipeline disposed in a lower stage of the air heat exchanger, a path switching valve disposed in the water circuit between the pump and the water heat exchanger, a bypass circuit connected between the path switching valve and an inlet of the water channel pipeline and connecting an outlet of the water channel pipeline to the water circuit between the path switching valve and an inlet of the water heat exchanger, and
  • the heat pump water heater since freezing of the drain pan is prevented by circulating the high-temperature circulating water in the hot water tank to a lower-stage path in the air heat exchanger during the defrosting operation and by heating the drained water generated in an upper stage of the air heat exchanger and then allowing it to flow into the drain pan, there is no need to distribute the part of the high-pressure side refrigerant pipeline or the part of the water pipeline for supplying hot water on the drain pan, which has an advantage that the mounting structure is simplified.
  • the part of the high-pressure side refrigerant pipeline or the part of the water pipeline for supplying hot water is not distributed on the drain pan, the discharge path of the drained water is not blocked, the drain reservoir is hardly generated, and the drained water is smoothly drained, which has an advantage that cooling and freezing of the drained water in the drain reservoir during the heating operation is suppressed.
  • Fig. 1 is a circuit diagram during a defrosting operation of a heat pump water heater according to Embodiment 1 of the present invention.
  • the heat pump water heater according to Embodiment 1 of the present invention is composed of a compressor 1, a four-way valve 2 that switches a refrigerant circuit during the defrosting operation, a water heat exchanger 3 that performs heat exchange between water and a refrigerant, an electronic expansion valve 4 that adjusts a flow rate of the refrigerant and decompresses, and an air heat exchanger 5 that performs heat exchange between the air and the refrigerant connected sequentially by a refrigerant pipeline 6.
  • a water circuit 10 between the water heat exchanger 3 and a hot water tank 7 is connected at a water-outlet side connection joint 8 and a water-inlet side connection joint 9, and water is circulated by a pump 11.
  • a three-way valve 12 that switches to the water heat exchanger 3 during a heating operation and to the water circuit 10 so as to be connected to the water heat exchanger 3 via a lower-stage path 5a of the air heat exchanger during the defrosting operation is disposed.
  • the three-way valve 12 constitutes a path switching valve.
  • the lower-stage path 5a of the air heat exchanger constitutes a water channel pipeline.
  • a bypass circuit 14 is constituted by connecting the three-way valve 12 (path switching valve) to an inlet of the lower-stage path 5a of the air heat exchanger (water channel pipeline), and connecting an outlet of the lower-stage path 5a of the air heat exchanger (water channel pipeline) to the water circuit 10 between the three-way valve 12 (path switching valve) and an inlet of the water heat exchanger 3.
  • Fig. 2 is a block diagram illustrating a configuration relating to control of an operation of the heat pump water heater according to Embodiment 1 of the present invention.
  • reference numeral 21 designates a control portion, which is composed of a microcomputer, a DSP or the like.
  • reference numeral 22 designates a memory, which stores various types of data, tables and the like.
  • Reference numeral 23 designates a ROM, which stores a program executed by the control portion 21 and fixed data.
  • Reference numeral 24 designates an input/output bus, and information of all the devices is exchanged with the control portion 21 through this input/output bus 24.
  • Reference numeral 25 designates a four-way valve driving portion, which drives switching of the four-way valve 2 on the basis of an instruction from the control portion 24.
  • reference numeral 26 designates a three-way valve driving portion, which drives switching of the three-way valve 12 on the basis of an instruction from the control portion 24.
  • Reference numeral 27 designates a communication portion, which receives setting information from a remote controller (hereinafter referred to as remote in some cases) 28 and transmits it to the control portion through the input/output bus 24.
  • remote controller hereinafter referred to as remote in some cases
  • the lower-stage path 5a of the air heat exchanger constitutes a water channel pipeline.
  • FIG. 3 is a flowchart illustrating the behavior of the control portion 21 concerning the control of the operation of the heat pump water heater according to Embodiment 1 of the present invention. Subsequently, the behavior of the control portion 21 in Embodiment 1 will be described using Figs. 1 to 3 . While a power switch of the water heater is on, an operation of the water heater is performed, but since this operation is not related to the present application, it will not be described here. During the operation of the water heater, processing shown in Fig. 3 is cyclically started in a relatively short cycle (a cycle of several milli seconds to several seconds, for example). If the processing of Fig.
  • Step S301 the control portion 21 executes initial value setting such as clearing of a timer value
  • Step 302 executes reception from the remote controller 28
  • Step 302 the control portion 21 examines contents received from the remote controller 28 and determines whether there is a defrosting operation start instruction or not (Step S303).
  • the air heat exchanger 5 which works as an evaporator and performs heat exchanger between the air and a refrigerant becomes a low temperature at 0°C or below, the air passing through the air heat exchanger 5 is cooled, and moisture in the air is condensed on surface of the air heat exchanger 5 and forms frost, which blocks the air passage.
  • the defrosting operation if a defrosting operation start instruction signal is transmitted from the remote controller 28 on the basis of a manipulation of the remote controller by a user and this instruction is received by the control portion 21 sequentially through the communication portion 27 and the input/output bus 24, the control portion 21 recognizes the defrosting operation start by this instruction signal, controls the four-way valve driving portion 25 and the three-way valve driving portion 26 on the basis of defrosting operation information set in the memory 22 in advance and switches the four-way valve 2 and the three-way valve 12 (Steps S304 to S305).
  • Step S306 the control portion 21 drives the compressor 1 and starts the defrosting operation.
  • a timer is counted and the defrosting operation is continuously performed until a predetermined time has elapsed (Steps S307 to S308).
  • the frost adhering to the surface of the air heat exchanger is heated and becomes drained water, which drops onto the drain pan 13 running down on the fin, flows through a water discharge groove of the drain pan 13 and is discharged to the outside of the unit through a water outlet.
  • Step S309 the control portion 21 switches the four-way valve 2 and the three-way valve 12 back to the original positions and further stops the compressor so as to stop the defrosting operation (Step S309) and finishes the processing. After that, the operation of the water heater is performed.
  • the defrosting operation is instructed by the remote controller 28 , but it is needless to say that the instruction can be made by a switch operation on an operation panel on the main body side of the water heater.
  • Fig. 4 is a flowchart illustrating the behavior of the control portion concerning control of an operation of a heat pump water heater according to Embodiment 2 of the present invention.
  • the flow is the same in Fig. 3 except that Steps S301 to S302 in Fig. 3 are replaced by Steps S401 to S402. Subsequently, the behavior of the control portion 21 will be described using Fig.
  • the control portion 21 sets an initial value (Step S301) and then calculates operation efficiency of the heat pump water heater (Step S401).
  • a calculation method of the operation efficiency a known method is used.
  • the operation efficiency is calculated on the basis of a rotation speed of the compressor 1. This rotation speed of the compressor 1 is detected by a rotation detector, not shown, mounted on a rotation shaft of the compressor 1.
  • the rotation speed of the compressor 1 may be calculated on the basis of an output of an inverter output current detector, not shown, using the current detector (such as a current transducer and the like), not shown.
  • the control portion 21 compares the calculated operation efficiency with a predetermined reference value set (Step S402).
  • Step S401 the routine returns to Step S401, where the calculation of the operation efficiency and the comparison with the reference value are repeated.
  • the comparison at Step S402 if the operation efficiency falls below the predetermined reference value set, an operation is performed similarly to Step S304 and after in Fig. 3 .
  • the defrosting operation is performed automatically, users don't have to make manipulation to instruct the defrosting operation. Also, since the defrosting operation is performed reliably, an efficient operation is made possible all the time.
  • Fig. 5 is an exploded perspective view of the heat pump water heater according to Embodiment 2 of the present invention.
  • a piping length of the water circuit 10 that connects them to each other can be made shorter and simple in configuration, and a manufacturing cost can be kept low.
  • the three-way valve 12 used for switching of the water circuit during the defrosting operation on the inlet side of the water heat exchanger 3, the high-temperature water circulated from the hot water tank 7 in the water heat exchanger 3, which is an evaporator during the defrosting operation, can be supplied to the lower-stage path 5a of the air heat exchanger without lowering the temperature.
  • the fin disposed in the air heat exchanger 5 by eliminating a cut-and-raised portion of the fins in the path portion through which the refrigerant flows, water removal performance of the fin in the periphery of the path portion, which becomes an evaporator during heating operation and through which the low-temperature refrigerant flows, is improved, and growth of frost can be suppressed.

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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)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP09836198.3A 2009-01-05 2009-06-30 Chauffe-eau du type pompe a chaleur Not-in-force EP2375195B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009000180A JP5713536B2 (ja) 2009-01-05 2009-01-05 ヒートポンプ式給湯器
PCT/JP2009/061944 WO2010076858A1 (fr) 2009-01-05 2009-06-30 Chauffe-eau du type pompe à chaleur

Publications (3)

Publication Number Publication Date
EP2375195A1 true EP2375195A1 (fr) 2011-10-12
EP2375195A4 EP2375195A4 (fr) 2016-08-24
EP2375195B1 EP2375195B1 (fr) 2019-05-15

Family

ID=42309911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09836198.3A Not-in-force EP2375195B1 (fr) 2009-01-05 2009-06-30 Chauffe-eau du type pompe a chaleur

Country Status (4)

Country Link
US (1) US20110214444A1 (fr)
EP (1) EP2375195B1 (fr)
JP (1) JP5713536B2 (fr)
WO (1) WO2010076858A1 (fr)

Cited By (10)

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GB2497171A (en) * 2012-11-02 2013-06-05 Asd Entpr Ltd Building hot water system having a heat pump and a hot water tank
CN103216970A (zh) * 2013-04-11 2013-07-24 王子忠 环保节能型三源冷暖热泵热水机系统
CN104501403A (zh) * 2013-07-09 2015-04-08 广东美的暖通设备有限公司 热水机控制系统及热水机控制方法
CN105135747A (zh) * 2015-08-17 2015-12-09 Tcl空调器(中山)有限公司 热泵型空调热水器
WO2016059536A1 (fr) * 2014-10-13 2016-04-21 Giamblanco Vincenzo Appareil de pompe à chaleur avec récupération d'énergie
CN105674559A (zh) * 2016-01-04 2016-06-15 广东美的暖通设备有限公司 热水机及热水机的控制方法
CN105757827A (zh) * 2016-03-29 2016-07-13 合肥美的暖通设备有限公司 空调器热回收系统、空调器、空调器热回收和除霜方法
CN105783356A (zh) * 2016-03-29 2016-07-20 合肥美的暖通设备有限公司 空调器除霜系统、空调器、空调器除霜和热回收方法
EP3012551A4 (fr) * 2013-06-18 2016-07-20 Panasonic Ip Man Co Ltd Appareil de pompe à chaleur
EP4137751A4 (fr) * 2020-06-08 2023-10-04 GD Midea Air-Conditioning Equipment Co., Ltd. Procédé de commande, dispositif de commande, système de climatisation et support d'enregistrement lisible par ordinateur

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CN108317727B (zh) * 2018-02-05 2020-08-25 广东美的暖通设备有限公司 热水器及其水路系统的防冻控制方法、控制器和存储介质
KR20210108242A (ko) * 2020-02-25 2021-09-02 엘지전자 주식회사 히트펌프 공기조화기
CN111765665B (zh) * 2020-06-17 2021-08-03 珠海格力电器股份有限公司 一种自动精准除霜控制方法、装置及热泵热水机
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2497171B (en) * 2012-11-02 2013-10-16 Asd Entpr Ltd Improvements to thermodynamic solar heat transfer systems
GB2497171A (en) * 2012-11-02 2013-06-05 Asd Entpr Ltd Building hot water system having a heat pump and a hot water tank
EP2959230B1 (fr) * 2012-11-02 2020-02-19 ASD Enterprises Limited Perfectionnements de systèmes de transfert de chaleur solaire thermodynamiques
CN103216970A (zh) * 2013-04-11 2013-07-24 王子忠 环保节能型三源冷暖热泵热水机系统
EP3012551A4 (fr) * 2013-06-18 2016-07-20 Panasonic Ip Man Co Ltd Appareil de pompe à chaleur
CN104501403A (zh) * 2013-07-09 2015-04-08 广东美的暖通设备有限公司 热水机控制系统及热水机控制方法
CN104501403B (zh) * 2013-07-09 2018-05-08 广东美的暖通设备有限公司 热水机控制系统及热水机控制方法
WO2016059536A1 (fr) * 2014-10-13 2016-04-21 Giamblanco Vincenzo Appareil de pompe à chaleur avec récupération d'énergie
CN105135747A (zh) * 2015-08-17 2015-12-09 Tcl空调器(中山)有限公司 热泵型空调热水器
CN105674559A (zh) * 2016-01-04 2016-06-15 广东美的暖通设备有限公司 热水机及热水机的控制方法
CN105674559B (zh) * 2016-01-04 2018-07-13 广东美的暖通设备有限公司 热水机及热水机的控制方法
CN105757827A (zh) * 2016-03-29 2016-07-13 合肥美的暖通设备有限公司 空调器热回收系统、空调器、空调器热回收和除霜方法
CN105783356A (zh) * 2016-03-29 2016-07-20 合肥美的暖通设备有限公司 空调器除霜系统、空调器、空调器除霜和热回收方法
CN105757827B (zh) * 2016-03-29 2019-09-17 合肥美的暖通设备有限公司 空调器热回收系统进行除霜的方法
EP4137751A4 (fr) * 2020-06-08 2023-10-04 GD Midea Air-Conditioning Equipment Co., Ltd. Procédé de commande, dispositif de commande, système de climatisation et support d'enregistrement lisible par ordinateur

Also Published As

Publication number Publication date
EP2375195A4 (fr) 2016-08-24
WO2010076858A1 (fr) 2010-07-08
JP2010156523A (ja) 2010-07-15
JP5713536B2 (ja) 2015-05-07
EP2375195B1 (fr) 2019-05-15
US20110214444A1 (en) 2011-09-08

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