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    • 6. 发明申请
    • Air Conditioning System for Vehicle
    • 车辆空调系统
    • US20120125026A1
    • 2012-05-24
    • US13388040
    • 2010-07-20
    • Tetsuya IshizekiAtsuo InoueMasato TsuboiKenichi Suzuki
    • Tetsuya IshizekiAtsuo InoueMasato TsuboiKenichi Suzuki
    • F25B49/02F25B1/00
    • F04B49/06B60H1/00485B60H2001/3254B60H2001/3297
    • Provided is an air conditioning system for vehicles wherein a flow rate of refrigerant used for estimating a compressor torque can be accurately estimated by accurately detecting a difference between pressures at upstream and downstream sides of an orifice, which has a high correlation with the flow rate of refrigerant, and ultimately, the compressor torque can be accurately estimated, and this estimation can be performed while space saving and cost down can be achieved. The air conditioning system for vehicles having a refrigeration cycle provided with a refrigerant compressor, a condenser, a pressure reduction/expansion mechanism and an evaporator is characterized in that an orifice for throttling a refrigerant flow is disposed in a refrigerant path between the condenser and the pressure reduction/expansion mechanism, a pressure difference detection means capable of detecting a difference between pressures at upstream and downstream positions of the orifice is provided, and provided are a refrigerant flow rate estimation means for estimating a refrigerant flow rate with reference to the detected pressure difference and a compressor torque estimation means for estimating a compressor torque with reference to the estimated refrigerant flow rate.
    • 提供一种用于车辆的空调系统,其中用于估计压缩机扭矩的制冷剂的流量可以通过精确地检测与孔的上游和下游侧的压力之间的差异来精确地估计,其与流量 制冷剂,并且最终可以精确地估计压缩机扭矩,并且可以在节省空间并降低成本的情况下执行该估计。 具有设置有制冷剂压缩机,冷凝器,减压/膨胀机构和蒸发器的制冷循环的车辆的空调系统的特征在于,用于节流制冷剂流的孔设置在冷凝器和冷凝器之间的制冷剂路径中 提供了一种能够检测孔的上游和下游位置处的压力差的压力差检测装置,并且设置有用于根据检测压力估计制冷剂流量的制冷剂流量估计装置 压缩机转矩估计装置,用于根据所估计的制冷剂流量来估计压缩机转矩。
    • 8. 发明授权
    • Temperature control system for refrigeration apparatus
    • 制冷设备温度控制系统
    • US4132086A
    • 1979-01-02
    • US773379
    • 1977-03-01
    • Kenneth J. Kountz
    • Kenneth J. Kountz
    • F24F11/02B60H1/32F25B1/00F25B49/02G05D23/00G05D23/24
    • B60H1/3211F25B49/022G05D23/1931G05D23/24B60H2001/3252B60H2001/3254B60H2001/3263B60H2001/3275
    • A controlled space is maintained at a desired set point temperature by adjusting the evaporator boiling pressure in a refrigeration system, thereby controlling the evaporator capacity (namely, the amount of cooling imparted to the air supplied to the space) which is inversely proportional to the evaporator boiling pressure. When the space temperature tends to vary from the desired set point due, for example, to a changing heat load, the control system automatically changes the refrigerant flow through the evaporator to establish the evaporator boiling pressure (and hence the boiling temperature) at the control point required to cool the air sufficiently to maintain the controlled space at the desired temperature. More specifically, in response to a space temperature increase, the flow rate of the refrigerant increases to decrease the evaporator boiling pressure; and in response to a drop below the set point, the refrigerant flow decreases to increase the evaporator boiling pressure. Such control of the flow rate, and consequently the evaporator boiling pressure, is achieved by varying the displacement of a controlled displacement compressor included in the refrigeration system. When the heat load on the evaporator is constant, the refrigerant flow is automatically controlled in order to hold the evaporator boiling pressure fixed at the required control point.
    • 通过调节制冷系统中的蒸发器沸腾压力将受控空间维持在所需的设定点温度,从而控制蒸发器的容量(即,供应给空间的空气的冷却量)与蒸发器成反比 沸腾压力。 当空间温度趋向于由于例如由于热负荷变化而导致的期望设定点变化时,控制系统自动地改变通过蒸发器的制冷剂流量,从而在控制下建立蒸发器沸腾压力(因此沸点温度) 足以冷却空气以将受控空间维持在所需温度所需的点。 更具体地,响应于空间温度升高,制冷剂的流量增加以降低蒸发器沸腾压力; 并且响应于低于设定点的下降,制冷剂流量减小以增加蒸发器沸腾压力。 通过改变包括在制冷系统中的受控排量的压缩机的位移来实现流量的这种控制以及因此蒸发器沸腾压力的控制。 当蒸发器上的热负荷恒定时,制冷剂流量被自动控制,以将蒸发器沸腾压力固定在所需控制点。