US20180016726A1 - Heat pump system, washing-drying integrated machine and clothes dryer - Google Patents

Heat pump system, washing-drying integrated machine and clothes dryer Download PDF

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Publication number
US20180016726A1
US20180016726A1 US15/503,785 US201415503785A US2018016726A1 US 20180016726 A1 US20180016726 A1 US 20180016726A1 US 201415503785 A US201415503785 A US 201415503785A US 2018016726 A1 US2018016726 A1 US 2018016726A1
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US
United States
Prior art keywords
air duct
heat pump
pump system
branch
condenser
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
US15/503,785
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English (en)
Inventor
Peishi Lv
Sheng Xu
Huacheng Song
Shiqiang Shan
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.)
Qingdao Haier Washing Machine Co Ltd
Original Assignee
Qingdao Haier Washing Machine 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 Qingdao Haier Washing Machine Co Ltd filed Critical Qingdao Haier Washing Machine Co Ltd
Assigned to QINGDAO HAIER WASHING MACHINE CO., LTD. reassignment QINGDAO HAIER WASHING MACHINE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LV, PEISHI, SHAN, Shiqiang, SONG, Huacheng, XU, SHENG
Publication of US20180016726A1 publication Critical patent/US20180016726A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • 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
    • F25B1/00—Compression machines, plants or systems with non-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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat pumps

Definitions

  • the present disclosure relates to the field of heating and dehumidifying of heat pumps, and in particular to a heat pump system, a washing-drying integrated machine and a clothes dryer.
  • Clothes dryers in the existing art include a direct-drainage type clothes dryer and a condensation type clothes dryer; both the direct-drainage type clothes dryer and the condensation type clothes dryer are prepared in a way that an air inflow passage and an air outflow passage are communicated with a drum in a tank body; a difference between the direct-drainage type clothes dryer and the condensation type clothes dryer is that a heater for heating air flowing into a washing drum is mounted in the air inflow passage of the direct-drainage type clothes dryer; the air inflow passage and the air outflow passage of the condensation type clothes dryer are communicated to form an air duct; not only a heating device for heating the air flowing into the washing drum and a fan for feeding the air heated by the heating device into the drum are mounted in the air duct, but also a condensing device for cooling a high-temperature gas flowing out of the washing drum is mounted; and similarly, drying systems of existing washing-drying integrated machines are same as those of the clothes dryers.
  • heat pump systems in the washing-drying integrated machines or clothes dryers adopting the heat pump drying mode are used for dehumidifying and heating the air flowing through the air duct;
  • the heat pump system includes an evaporator, a compressor, a condenser and a throttling device; the evaporator, the compressor, the condenser and the throttling device are sequentially communicated through a pipeline to form a refrigerant circulating loop;
  • the evaporator of the heat pump system is arranged at an air inlet of the air duct; the evaporator evaporates a liquid refrigerant into a gaseous refrigerant when refrigerant in the heat pump system enters the evaporator; in this process, the evaporator absorbs surrounding heat, as a condensing device in the air duct used for condensing the air flowing through the air duct
  • a saturation temperature under a refrigerant saturation pressure in the evaporator of the heat pump system is much lower than 0 DEG C.
  • a load of a compressor system is low, and an input power is small; but the heat for drying the air comes from power input of the compressor system, so the rise of the temperature in the washing/drying drum is extremely slow, which is adverse to the efficiency of drying clothes; and when a evaporation temperature is kept below 0 DEG C.
  • the evaporator is in contact with moist air blown out of the drum, a large number of frost may be condensed on surfaces of fins of the evaporator, an effective area of the evaporator is reduced, and the circulation of the air in a circulating air duct may be blocked, causing that the refrigerant in the compressor system cannot be completely vaporized, and a liquid-state refrigerant enters the compressor along an air suction pipe of the compressor, leading to a failure of the compressor.
  • an objective of the present disclosure is to provide a heat pump system which can increase a load rise rate of a compressor in a low-temperature environment.
  • a further objective of the present disclosure is to provide a washing-drying integrated machine in which the above heat pump system is arranged to increase the drying efficiency of clothes.
  • Another objective of the present disclosure is to provide a clothes dryer in which the above heat pump system is arranged to increase the drying efficiency of the clothes.
  • a heat pump system includes an evaporator, a compressor, a condenser and a refrigerant regulating subsystem; where the evaporator, the compressor, the condenser and the refrigerant regulating subsystem are sequentially communicated through a pipeline to form a refrigerant circulating loop; and the refrigerant regulating subsystem includes a first branch and a second branch connected in parallel between the evaporator and the condenser;
  • the first branch includes a first throttling device having an outlet connected with a pipe inlet of the evaporator, and a liquid storing device located between the first throttling device and the condenser; and
  • a second throttling device is connected with the second branch in series.
  • the second branch and the first branch may be connected with a pipe outlet of the condenser through a reversing valve.
  • Electromagnetic valves may be respectively arranged on the first branch between the condenser and the liquid storing device and the second branch between the second throttling device and the condenser.
  • the first throttling device may be a first capillary tube; the second throttling device may be a second capillary tube; and the length of the first capillary tube may be smaller than that of the second capillary tube.
  • the first throttling device and the second throttling device may be a same electronic expansion valve; and an opening degree of the electronic expansion valve may be adjustable.
  • Both the first throttling device and the second throttling device may be electronic expansion valves; and opening degrees of all the electronic expansion valves may be adjustable.
  • Check valves may be respectively arranged on the first branch between the liquid storing device and the first throttling device and the second branch between the second throttling device and the electromagnetic valve.
  • a washing-drying integrated machine includes an outer drum, an air duct and an inner drum arranged in the outer drum; an air inlet and an air outlet of the air duct are respectively connected with a rear part and a front part of the outer drum; the air duct and the outer drum form a closed loop; a fan is arranged in the air duct; the washing-drying integrated machine further includes the heat pump system according to any of the above; the evaporator of the heat pump system is arranged at the air inlet of the air duct, for condensing air flowing through the air duct; and the condenser of the heat pump system is located in the air duct between the fan and the evaporator, for heating air flowing through the air duct.
  • a clothes dryer includes a tank body, an air duct and a drying drum mounted in the tank body; an air inlet and an air outlet of the air duct are respectively connected with a rear part and a front part of the drying drum to form a closed loop together with the drying drum; a fan is arranged in the air duct; the clothes dryer further includes the heat pump system according to any of the above; the evaporator of the heat pump system is arranged at the air inlet of the air duct, for condensing air flowing through the air duct; and the condenser of the heat pump system is located in the air duct between the fan and the evaporator, for heating air flowing through the air duct.
  • An auxiliary electric heating device may be arranged in the air duct between the fan and the air outlet of the air duct.
  • the refrigerant regulating subsystem of the heat pump system includes the first branch and the second branch connected between the evaporator and the condenser in parallel;
  • the first branch includes the first throttling device having the outlet connected with the pipe inlet of the evaporator, and the liquid storing device located between the first throttling device and the condenser;
  • the second throttling device is connected with the second branch in series;
  • a flow direction of the refrigerant is the compressor, the condenser, the first branch (the liquid storing device and the first throttling device), the evaporator and the compressor when an environment temperature is high;
  • the flow direction of the refrigerant is the compressor, the condenser, the second branch (the second throttling device), the evaporator and the compressor when an environment temperature is low; therefore, when the temperature is high, the liquid storing device enables a space for accommodating the refrigerant to increase, and pressure load does not increase rapidly; while at a low temperature, the
  • the length of the first capillary tube is smaller than that of the second capillary tube, i.e., the length of the second capillary tube is longer, and the capillary tube is set to be longer at the low temperature in order to match a superheat degree of the evaporator in this environment, avoid incomplete evaporation since a pressure rises rapidly and excessive refrigerant enters the evaporator, and avoid a problem of a failure of the compressor since a liquid-state refrigerant enters the compressor along an air suction pipe of the compressor.
  • FIG. 1 is a schematic structural diagram illustrating a heat pump system provided by device embodiments according to the present disclosure.
  • FIG. 2 is a schematic structural diagram illustrating a clothes dryer provided by device embodiments according to the present disclosure.
  • FIG. 1 is a schematic structural diagram illustrating a heat pump system provided by device embodiments according to the present disclosure.
  • the heat pump system includes an evaporator 3 , a compressor 4 , a condenser 2 and a refrigerant regulating subsystem 1 ; and the evaporator 3 , the compressor 4 , the condenser 2 and the refrigerant regulating subsystem 1 are sequentially communicated through a pipeline to form a refrigerant circulating loop, where the refrigerant regulating subsystem 1 includes a first branch 11 and a second branch 12 connected in parallel between the evaporator 3 and the condenser 2 .
  • the first branch 11 includes a first throttling device 111 having an outlet connected with a pipe inlet of the evaporator 3 , and a liquid storing device 114 for storing refrigerant; and the liquid storing device 114 is located between the first throttling device 111 and the condenser 2 .
  • a second throttling device 121 is connected with the second branch 12 in series.
  • the second branch 12 and the first branch 11 are connected with the pipe outlet of the condenser 2 through a reversing valve.
  • the reversing valve is connected with a controller; the reversing valve controls a flow direction of refrigerant flowing out of the condenser 2 according to a received signal sent by the controller and controls the refrigerant to flow through the first branch 11 or the second branch 12 ; and therefore, the purpose of adopting the reversing valve is to control refrigerant to switch between two flow directions.
  • a first electromagnetic valve 116 can also be arranged on the first branch 11 between the condenser 2 and the liquid storing device 114
  • a second electromagnetic valve 122 is arranged on the second branch 12 between the second throttling device 121 and the pipe outlet of the condenser 2
  • both the first electromagnetic valve 116 and the second electromagnetic valve 122 are connected with the controller
  • the controller controls the flow direction of the refrigerant flowing out of the condenser 2 by controlling opening or closing of the first electromagnetic valve 116 or the second electromagnetic valve 122 , and controls the refrigerant to flow through the first branch 11 or the second branch 12
  • the purpose of adopting the electromagnetic valves is also to control refrigerant to switch between two flow directions.
  • the flow direction of the refrigerant is that high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 4 flows through the condenser 2 and is changed into a liquid condensing agent after being condensed by the condenser 2 ; in this process, the condenser 2 releases heat to the outside; the liquid condensing agent enters the liquid storing device 114 through the reversing valve; the liquid storing device 114 temporarily stores the refrigerant; then the refrigerant enters the evaporator 3 from the liquid storing device 114 through the first throttling device 111 ; the evaporator 3 evaporates the liquid refrigerant into gaseous refrigerant; in this process, the evaporator 3 absorbs the surrounding heat; and the gaseous refrigerant enters the compressor 4 along the pipeline.
  • the flow direction of the refrigerant is that high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 4 flows through the condenser 2 and is changed into the liquid condensing agent after being condensed by the condenser 2 ; in this process, the condenser 2 releases heat to the outside; the liquid condensing agent enters the second branch 12 through the reversing valve, enters the second throttling device 121 along the second branch 12 , and then flows to the evaporator 3 ; the evaporator 3 evaporates the liquid refrigerant into gaseous refrigerant; in the process, the evaporator 3 absorbs the surrounding heat; and the gaseous refrigerant enters the compressor 4 along the pipeline.
  • the first throttling device 111 is a first capillary tube
  • the second throttling device 121 is a second capillary tube.
  • the length of the first capillary tube is smaller than that of the second capillary tube, and the second capillary tube is set to be longer in order to match a superheat degree of the evaporator 3 in a low-temperature state, thereby avoiding incomplete evaporation since a pressure rises rapidly and excessive refrigerant enters the evaporator 3 .
  • selection of the first throttling device 111 and the second throttling device 121 is not limited to this; electronic expansion valves may be used respectively as the first throttling device 111 and the second throttling device 121 ; the electronic expansion valves on the two branches are respectively connected with the controller; the electronic expansion valves regulate respective opening degrees according to command signals sent by the controller; and the opening degree of the electronic expansion valve on the first branch 11 during normal operation is greater than that of the electronic expansion valve on the second branch 12 during normal operation.
  • the same electronic expansion valve may also be used as the first throttling device 111 and the second throttling device 121 ; the electronic expansion valve is connected with the controller; the electronic expansion valve regulates the opening degree according to the command signal sent by the controller; when the system uses different branches, opening degrees of the electronic expansion valve are also different; normally, the opening degree of the electronic expansion valve when the first branch 11 is operated normally is greater that of the electronic expansion valve when the second branch 12 is operated normally.
  • a first check valve 112 is arranged on the first branch 11 between the liquid storing device 114 and the first throttling device 111 ; and the first check valve 112 plays a role of preventing the refrigerant from flowing back into the liquid storing device 114 during operation in a low-temperature mode.
  • a second check valve may also be arranged on the second branch 113 between the second throttling device 121 and the second electromagnetic valve 122 , to avoid accumulating the refrigerant or lubricating oil in the pipeline in a state of high environment temperature.
  • the liquid storing device 114 is a liquid storing tank, but certainly is not limited hereto; and the liquid storing device may also be selected.
  • the present disclosure also provides a clothes dryer, as shown in FIG. 2 ;
  • the clothes dryer includes a tank body 6 , an air duct 5 and a drying drum 7 mounted in the tank body 6 ; an air inlet 51 and an air outlet 52 of the air duct 5 are respectively connected with a rear part and a front part of the drying drum 7 ; the air duct 5 and the drying drum 7 form a closed loop; a fan 54 is arranged in the air duct 5 ;
  • the clothes dryer further includes the above heat pump system;
  • the evaporator 3 of the heat pump system is arranged at the air inlet 51 of the air duct 5 , as a condensing device in the air duct 5 , for condensing air flowing through the air duct 5 ;
  • the condenser 2 of the heat pump system is located in the air duct 5 between the fan 54 and the evaporator 3 , as a heating device in the air duct 5 , for heating the air flowing through the air duct 5 .
  • an auxiliary electric heating device 53 is arranged in the air duct 5 between the fan 54 and the air outlet 52 of the air duct 5 , for further heating the air flowing through the air duct 5 .
  • a filter 55 is arranged at the air inlet 51 of the air duct 5 ; and the filter 55 can filter the air entering the air duct 5 from the drying drum 7 , and prevent dander and other debris in the air from entering the air duct 5 , so as to guarantee sanitation and hygiene in the air duct 5 .
  • the drying process of the clothes dryer is that the fan 54 drives the air to flow in the air duct 5 and the drying drum 7 in a circulation manner, while the condenser 2 of the heat pump system heats the air flowing therethrough; hot air enters the drying drum 7 , to evaporate out and take away water vapor in clothes; then the air containing the water vapor passes through the evaporator 3 of the heat pump system; the evaporator 3 absorbs the surrounding heat to cool the surrounding air so that the water vapor in the hot air is condensed into liquid water and is drained out of a machine along with tap water; dry air from which the water vapor is removed is reheated by the condenser 2 of the heat pump system and re-enters the drying drum 7 to dry the clothes; and this process is continuously circulated until the clothes are dried.
  • the present disclosure further provides a washing-drying integrated machine;
  • the washing-drying integrated machine includes an outer drum, an air duct and an inner drum arranged in the outer drum; an air inlet and an air outlet of the air duct are respectively connected with a rear part and a front part of the outer drum; the air duct and the outer drum form a closed loop; and a fan is arranged in the air duct.
  • the washing-drying integrated machine further includes the heat pump system according to any of the above; the evaporator 3 of the heat pump system is arranged at the air inlet of the air duct, as a condensing device in the air duct, for condensing the air flowing through the air duct; and the condenser 2 of the heat pump system is located in the air duct between the fan 54 and the evaporator 3 , as a heating device in the air duct, for heating the air flowing through the air duct.
  • an auxiliary electric heating device is arranged in the air duct between the fan and the air outlet of the air duct, for further heating the air flowing through the air duct.
  • the drying process of the washing-drying integrated machine is similar to the drying process of the clothes dryer, and is not repeatedly described here.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US15/503,785 2014-08-18 2014-11-17 Heat pump system, washing-drying integrated machine and clothes dryer Abandoned US20180016726A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201410406212.X 2014-08-18
CN201410406212.XA CN105466078A (zh) 2014-08-18 2014-08-18 一种热泵系统、洗干一体机及干衣机
PCT/CN2014/091311 WO2016026226A1 (zh) 2014-08-18 2014-11-17 一种热泵系统、洗干一体机及干衣机

Publications (1)

Publication Number Publication Date
US20180016726A1 true US20180016726A1 (en) 2018-01-18

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US15/503,785 Abandoned US20180016726A1 (en) 2014-08-18 2014-11-17 Heat pump system, washing-drying integrated machine and clothes dryer

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US (1) US20180016726A1 (ja)
EP (1) EP3184934B1 (ja)
JP (1) JP6389563B2 (ja)
KR (1) KR20170044673A (ja)
CN (1) CN105466078A (ja)
WO (1) WO2016026226A1 (ja)

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CN108951047B (zh) * 2017-05-17 2021-10-01 青岛海尔洗涤电器有限公司 一种可调整系统负荷的热泵系统及干衣机及控制方法
CN109059411A (zh) * 2018-08-30 2018-12-21 Tcl家用电器（合肥）有限公司 冰箱及其控制方法、控制装置、可读存储介质
CN110965292A (zh) * 2018-09-29 2020-04-07 青岛海尔滚筒洗衣机有限公司 一种衣物处理装置及其控制方法
JP7149463B2 (ja) * 2019-04-09 2022-10-07 パナソニックＩｐマネジメント株式会社 洗濯機
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CN114182504B (zh) * 2021-11-30 2022-08-26 珠海格力电器股份有限公司 一种压缩机的散热控制方法及使用其的热泵衣物处理装置

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Also Published As

Publication number Publication date
EP3184934A4 (en) 2018-04-18
CN105466078A (zh) 2016-04-06
JP6389563B2 (ja) 2018-09-12
EP3184934B1 (en) 2019-06-19
EP3184934A1 (en) 2017-06-28
KR20170044673A (ko) 2017-04-25
JP2017526887A (ja) 2017-09-14
WO2016026226A1 (zh) 2016-02-25

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