[특허]Heat pump clothes dryer

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Heat pump clothes dryer

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F26B-021/06 F26B-021/0694
미국특허분류(USC)	034/073; 034/076; 034/077; 034/078
출원번호	UP-0402421 (2006-04-11)
등록번호	US-7665225 (2010-04-09)
발명자 / 주소	Goldberg, Michael Truman, James C. Kniffin, Alexander B.
인용정보	피인용 횟수 : 30 인용 특허 : 11

초록
▼

A drying apparatus for drying articles such as clothing is provided. The drying apparatus includes a chamber for containing articles to be dried and a system for supplying heated dry air at a first temperature to the chamber. The air supplying system comprises an air flow pathway having an evaporator for removing moisture from air exiting the chamber and for decreasing the temperature of the air to below dew point temperature. The air supply system further has a condenser for increasing the temperature of the air exiting the evaporator to the first tempe...

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What is apparatus is: 1. A drying apparatus comprising: a housing; a drying chamber mounted in the housing for containing articles to be dried, said drying chamber including an air inlet where drying air is delivered to said drying chamber and an air outlet where drying air leaves said drying chamber; an air flow path connecting said air inlet to said air outlet to form a substantially closed drying loop; a blower arranged to circulate air in said drying loop and through said drying chamber; a heat pump comprising: a refrigerant loop; a compressor arranged to circulate refrigerant in said refrigerant loop under pressure, said compressor having a power consumption; a first heat exchanger connected to said refrigerant loop and arranged in said drying loop so that heat from drying air leaving said drying chamber is transferred to said refrigerant, reducing the temperature of said drying air to below dew point so that moisture extracted from articles in said drying chamber condenses out of said drying air; a valve in said refrigerant loop, said valve controlling the flow of refrigerant into said first heat exchanger; a second heat exchanger connected to said refrigerant loop and arranged in said drying loop between said first heat exchanger and said drying chamber so that heat from said refrigerant is transferred to said drying air entering said drying chamber; and a refrigerant subcooler in said refrigerant loop and connected between a discharge of said second heat exchanger and said valve, said refrigerant subcooler comprising a third heat exchanger configured to extract a quantity of heat from refrigerant leaving said second heat exchanger, the quantity of heat extracted being modulated to be substantially equal to the power consumption of said compressor, said quantity of heat being removed from said refrigerant after said refrigerant has warmed said drying air, wherein said quantity of heat is removed from said drying apparatus, wherein said third heat exchanger is a refrigerant to liquid heat exchanger constructed to transfer heat from said refrigerant to a liquid coolant and said drying apparatus includes a coolant flow oath for delivering liquid coolant to said third heat exchanger from a source outside said drying apparatus and returning said liquid coolant to a location outside said drying apparatus. 2. The drying apparatus of claim 1, comprising a heat transfer device including a heat absorbing component arranged in said drying loop to extract heat from said drying air entering said first heat exchanger, a heat emitting component arranged in said drying loop to return at least a portion of said heat to said drying air leaving said first heat exchanger and a heat transfer path from said heat absorbing component to said heat emitting component. 3. The drying apparatus of claim 2, wherein said heat transfer device is a heat pipe. 4. The drying apparatus of claim 1, wherein said compressor is arranged to pressurize refrigerant leaving said first heat exchanger and deliver said pressurized refrigerant to said second heat exchanger, said drying apparatus comprising a refrigerant to refrigerant heat exchanger arranged to transfer heat from refrigerant leaving said second heat exchanger to refrigerant leaving said first heat exchanger before said refrigerant is pressurized by said compressor. 5. The drying apparatus of claim 1, wherein said drying chamber is mounted for rotation about an axis within said cabinet and said chamber includes vanes or baffles for tumbling articles placed in the chamber, said air inlet communicating with said drying chamber at a position below said axis, whereby said drying air enters said drying chamber in an upward direction. 6. The drying apparatus of claim 1, wherein said valve is a thermal expansion valve configured to maintain the refrigerant leaving said first heat exchanger at constant or near constant superheat. 7. The drying apparatus of claim 6, wherein said thermal expansion valve is electronically controlled. 8. The drying apparatus of claim 1, wherein said drying chamber includes an inside surface, at least a portion of which is heated. 9. The drying apparatus of claim 8, wherein said inside surface is heated by a refrigerant heat exchanger connected to said refrigerant loop, whereby heat from said refrigerant is transferred to said inside surface. 10. The drying apparatus of claim 9, wherein said refrigerant heat exchanger is integral to said drying chamber. 11. The drying apparatus of claim 9, wherein said refrigerant heat exchanger comprises tubing forming a portion of said refrigerant loop bonded to a surface of said drying chamber. 12. The drying apparatus of claim 9, wherein said refrigerant heat exchanger is connected to said refrigerant loop between said compressor and said second heat exchanger. 13. The drying apparatus of claim 1, wherein the drying chamber comprises a cylindrical drum fixedly mounted within said housing and having an inside surface, said drying apparatus comprising a plurality of vanes arranged to rotate within said drum in contact with or in close proximity to said inside surface. 14. The drying apparatus of claim 1, wherein said heat pump includes an active expander. 15. The drying apparatus of claim 1, wherein said active expander comprises a scroll type refrigerant compressor. 16. The drying apparatus of claim 1, comprising sensors arranged to detect a moisture content of said articles and a controller arranged to control said drying apparatus as a function of the detected moisture content. 17. The drying apparatus of claim 16, wherein said sensors include at least one of a humidity sensor at said air inlet, a temperature sensor at said air inlet, a humidity sensor at said air outlet and a temperature sensor at said air outlet. 18. A drying apparatus comprising: a housing; a drying chamber mounted in the housing for containing articles to be dried, said drying chamber including an air inlet where drying air is delivered to said drying chamber and an air outlet where drying air leaves said drying chamber; an air flow path connecting said air inlet to said air outlet to form a substantially closed drying loop; a blower arranged to circulate air in said drying loop and through said drying chamber; a heat pump comprising: a refrigerant loop; a compressor arranged to circulate refrigerant in said refrigerant loop under pressure, said compressor having a power consumption; a first heat exchanger connected to said refrigerant loop and arranged in said drying loop so that heat from drying air leaving said drying chamber is transferred to said refrigerant, reducing the temperature of said drying air to below dew point so that moisture extracted from articles in said drying chamber condenses out of said drying air; a valve in said refrigerant loop, said valve controlling the flow of refrigerant into said first heat exchanger; a second heat exchanger connected to said refrigerant loop and arranged in said drying loop between said first heat exchanger and said drying chamber so that heat from said refrigerant is transferred to said drying air entering said drying chamber; and a refrigerant subcooler in said refrigerant loop and connected between a discharge of said second heat exchanger and said valve, said refrigerant subcooler comprising a third heat exchanger configured to extract a quantity of heat from refrigerant leaving said second heat exchanger, the quantity of heat extracted being modulated to be substantially equal to the power consumption of said compressor, said guantity of heat being removed from said refrigerant after said refrigerant has warmed said drying air, wherein said quantity of heat is removed from said drying apparatus, wherein said first heat exchanger is an evaporator which receives refrigerant from said thermal expansion valve and said second heat exchanger is a condenser which receives refrigerant from said compressor. 19. The drying apparatus of claim 18, wherein said third heat exchanger is a refrigerant to air heat exchanger or a refrigerant to liquid heat exchanger. 20. A drying apparatus comprising: a housing; a drying chamber mounted in the housing for containing articles to be dried, said drying chamber including an air inlet where drying air is delivered to said drying chamber and an air outlet where drying air leaves said drying chamber; an air flow path connecting said air inlet to said air outlet to form a substantially closed drying loop; a blower arranged to circulate air in said drying loop and through said drying chamber; a heat pump comprising: a refrigerant loop; a compressor arranged to circulate refrigerant in said refrigerant loop under pressure, said compressor having a power consumption; a first heat exchanger connected to said refrigerant loop and arranged in said drying loop so that heat from drying air leaving said drying chamber is transferred to said refrigerant, reducing the temperature of said drying air to below dew point so that moisture extracted from articles in said drying chamber condenses out of said drying air; a valve in said refrigerant loop, said valve controlling the flow of refrigerant into said first heat exchanger; a second heat exchanger connected to said refrigerant loop and arranged in said drying loop between said first heat exchanger and said drying chamber so that heat from said refrigerant is transferred to said drying air entering said drying chamber; and a refrigerant subcooler in said refrigerant loop and connected between a discharge of said second heat exchanger and said valve, said refrigerant subcooler comprising a third heat exchanger configured to extract a quantity of heat from refrigerant leaving said second heat exchanger, the quantity of heat extracted being modulated to be substantially equal to the power consumption of said compressor, said quantity of heat being removed from said refrigerant after said refrigerant has warmed said drying air, wherein said quantity of heat is removed from said drying apparatus, wherein the quantity of energy extracted at said refrigerant subcooler is modulated according to a measured system parameter which varies with the power consumption of the compressor.

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Heat pump clothes dryer

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이 특허에 인용된 특허 (11)

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Heat pump clothes dryer

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이 특허에 인용된 특허 (11)

이 특허를 인용한 특허 (30)

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IPC 상세정보(version : 201201)

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