Integral heat pump air conditioner with compressed steam split circuit
A heat pump air conditioner, integrated technology, applied to the operation mode of the machine, cooling fluid circulation device, laminated components, etc., can solve the problems of low system efficiency, damage to the condenser, and increase the complexity of the system
Active Publication Date: 2017-05-24
MAHLE INT GMBH
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Problems solved by technology
[0009] Since the low pressure side of the system when used in air conditioning mode becomes the high pressure side when used in heat pump mode, one disadvantage of running the air conditioning system in heat pump mode is the added complexity of the system as it is required to pass through the use of thicker metering tubes and accessories to strengthen the refrigerant piping facilities of the whole system
Another known disadvantage of running the system in heat pump mode is that at colder temperatures, such as when the surface temperature of the condenser drops below 32°F, any water vapor that condenses on the surface of the condenser will freeze, thus making the system less effective and may even damage the condenser
Method used
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[0024] figure 1 A schematic flow diagram of an integrated HPAC system 10 is shown in , which is configured to capture waste thermal energy from one part of a vehicle and put it to beneficial use within another part of the vehicle. The monolithic HPAC system 10 includes a refrigerant circuit 12 in thermal communication with a cold coolant circuit 14 and a hot coolant circuit 16 . The main components of the refrigerant circuit 12 include a series of closed loop hydraulically connected condensers 18 , refrigerant expansion device 20 , and evaporator 22 . Centrally located in the refrigerant circuit 12 is a refrigerant compressor 24 located downstream of the evaporator 22 and upstream of the condenser 18 with respect to the direction of refrigerant flow. Compressor 24 is responsible for compressing and circulating a two-phase refrigerant, such as R-134a or R-1234yf, through refrigerant circuit 12 of monolithic HPAC system 10 .
[0025] The hot coolant circuit 16 includes a hot h...
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The present invention discloses a packaged heat pump air conditioner (HPAC) system (10) comprising a refrigerant split circuit (49) set to supply enough heat to defrost an external heat exchanger (44) but not significantly affect heat supply to The passenger compartment of a vehicle. The HPAC system (10) includes a refrigerant loop (12) set to pump heat to a hot coolant loop (16) from a cold coolant loop (14) that pumps heat from an external heat exchanger (44) ) collects heat, and the hot coolant circuit (16) supplies heat to the passenger compartment. The refrigerant circuit (12) includes a condenser (18) thermally connected to the hot coolant circuit (16), an evaporator (22) thermally connected to the cold coolant circuit (14), and A compressor (24) that circulates refrigerant through the refrigerant circuit (12). The refrigerant circuit (12) further includes means for selectively diverting at least a portion of the hot compressed refrigerant out of the compressor (24) directly into the evaporator (22), heating the cold refrigerant circuit (14) until sufficient to defrost External heat exchanger (44).
Description
[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 777,677, filed March 12, 2013, the contents of which are hereby incorporated in their entirety. [0003] This application is also a continuation-in-part of International Application No. PCT / US2012 / 025419 filed on February 16, 2012, claiming the priority of US Provisional Application No. 61 / 443,774 filed on February 17, 2011. [0004] This application is also a continuation-in-part of US Patent Application No. 13 / 396,211 filed on February 14, 2012, claiming the priority of US Provisional Application No. 61 / 443,774 filed on February 17, 2011. [0005] International Application No. PCT / US2012 / 025419, US Patent Application No. 13 / 396,211, and US Provisional Application No. 61 / 443,774 are hereby incorporated by reference in their entirety. technical field [0006] The present disclosure relates to heating and air conditioning systems for motor vehicles; in...
Claims
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IPC IPC(8): F25D17/00F28F3/00
CPCB60H1/00899B60H2001/00928F25B29/003F25B47/022F25B2339/047F25B2400/0411B60H1/00278B60H2001/00307B60H1/32284B60H2001/00961B60H1/3229
Inventor 卡里·M.·科瓦斯基普拉萨德·S.·卡德莱弗雷德里克·V.·奥迪林赛·L.·莱茨尔
Owner MAHLE INT GMBH