公开(公告)号：US20150308462A1

公开(公告)日：2015-10-29

申请号：US14443123

申请日：2013-11-01

Applicant: DENSO CORPORATION

Inventor： Ryoko AWA ,  Haruyuki NISHIJIMA ,  Yoshiaki TAKANO ,  Etsuhisa YAMADA ,  Satoshi ITOH ,  Kenta KAYANO

IPC: F04F5/46

CPC classification number: F04F5/46 ,  B60H1/00921 ,  B60H2001/3298 ,  F25B41/00 ,  F25B2341/0011 ,  F25B2341/0015

Abstract: A mixing portion that mixes an injection refrigerant and a suction refrigerant is formed in a range of an internal space of a heating-side body portion of a heating-side ejector from a refrigerant injection port of a heating-side nozzle portion to an inlet of a heating-side diffuser. Further, the mixing portion is formed in a shape that gradually decreases a refrigerant passage area toward a downstream side of a refrigerant flow, and a refrigerant passage area of the inlet of the heating-side diffuser is set smaller than that of the refrigerant injection port. Thus, the flow velocity of the mixed refrigerant is decelerated to a value lower than a two phase sound velocity within the mixing portion, thereby suppressing occurrence of shock wave in the heating-side diffuser and stabilizing the pressure increasing performance in the heating-side diffuser.

Abstract translation: 混合喷射制冷剂和吸入制冷剂的混合部分在加热侧喷射器的加热侧主体部分的内部空间从加热侧喷嘴部分的制冷剂喷射口的入口到 加热侧扩散器。 此外，混合部形成为朝向制冷剂流的下游侧逐渐减小制冷剂通过面积的形状，并且将加热侧扩散器的入口的制冷剂通路面积设定为小于制冷剂喷射口的制冷剂通路面积 。 因此，混合制冷剂的流速被减速到低于混合部分内的两相声速的值，从而抑制加热侧扩散器中的冲击波的发生，并稳定加热侧扩散器中的增压性能 。