To provide a low cost thin refrigerant pump which can be adopted to a unit for which height restriction is severly needed and does not require a cooling plate for a cooling system.
A hermetic vessel including an upper vessel 2 and a lower vessel 4 joined to each other, a pump mechanism part 6 stored in the hermetic vessel, and a motor 3 having an annular recess part 2a formed on an outer side of the upper vessel 2 to fix a stator 8 and having a rotor 10 arranged in the upper vessel 2 in a radial direction outside of the stator 8 are constructed in the refrigerant pump 1. A center shaft 14c of a shaft cylinder 14 is inserted in a center shaft insertion boss 12a formed on a center part of a bearing end plate 12 rotating as one unit with the rotor 10. A flange part 17a of a flanged end plate 17 is fitted and fixed in the lower vessel 4. A pump mechanism part 6 including a shaft cylinder 14 is fastened to the flanged end plate 17 by bolts 18. Refrigerant is made to pass through a lower space 14j and is discharged by driving the pump mechanism part 6 interlocking with rotation of the rotor 10 and the bearing end plate 12.
| JP2000087875 | VANE PUMP |
| JPS62223487 | GEAR PUMP DEVICE |
IKEDA AKIRA
Tomoyasu Sakaguchi
Hiroki Naito