Vacuum pump and control apparatus of vacuum pump with water leakage prevention between the pump main body and control apparatus

Patent metadata

Field	Value
Publication number	US-12448976-B2
Application number	US-202017441555-A
Country	US
Kind code	B2
Filing date	Mar 13, 2020
Priority date	Mar 28, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

A vacuum pump in which a pump main body and a control apparatus that controls the pump main body are integrated with each other. The control apparatus includes a cylindrical portion which protrudes from a chassis of the control apparatus and inside which a cable that connects the pump main body and the control apparatus to each other is passed. A height of the cylindrical portion exceeds a height of a gap formed between a bottom portion of the pump main body and the chassis of the control apparatus.

First claim

What is claimed is:

1. A vacuum pump in which a pump main body and a control apparatus that controls the pump main body are integrated with each other, wherein
the pump main body includes a hermetic connector having a plurality of pins,
a relay substrate is connected to the plurality of pins,
the relay substrate is connected to the control apparatus by a cable,
the control apparatus includes a cylindrical portion which protrudes from a chassis of the control apparatus through a hole in a bottom portion of the pump main body wherein the cable passes from the control apparatus into both the cylindrical portion and the hole, and wherein the hermetic connector is above an entirety of the cylindrical portion and the cable is loose of the cylindrical portion,
a height of the cylindrical portion exceeds a height of a gap formed between the bottom portion of the pump main body and the chassis of the control apparatus, and
the cylindrical portion comprises a hollow plate-like portion configured to prevent water droplets from infiltrating into the control apparatus.

2. The vacuum pump according to claim 1 , wherein
the pump main body includes a relay chamber which houses the relay substrate, and
the relay chamber is provided with a detachable cover.

3. The vacuum pump according to claim 2 , wherein a lower end of the relay substrate does not protrude downward beyond a bottommost end of the pump main body.

4. The vacuum pump according to claim 1 , wherein the bottom portion of the pump main body comprises a detachable plate.

5. The vacuum pump according to claim 4 , wherein
an attachable and detachable lid is provided with respect to a side portion of the chassis of the control apparatus,
the lid has a bent piece at one end thereof, and
the bent piece is brought into contact with a surface of the detachable plate.

6. The vacuum pump according to claim 5 , comprising a rotor shaft internally mounted to the pump main body and a front panel externally mounted to the control apparatus, wherein the lid is disposed within 90 degrees from a disposition direction of the front panel as viewed from a central axis of the rotor shaft.

7. The vacuum pump according to claim 4 , wherein the height of the cylindrical portion is formed so as to be higher than a combined height dimension of the gap and the plate.

8. The vacuum pump according to claim 1 , wherein
the bottom portion of the pump main body comprises a base portion of the pump main body,
the base portion comprises the hole, and
the height of the cylindrical portion is formed so as to be higher than a combined height dimension of the gap and the hole.

9. The vacuum pump according to claim 8 , wherein
an attachable and detachable lid is provided with respect to a side portion of the chassis of the control apparatus,
the lid has a bent piece at one end thereof, and
the bent piece is brought into contact with a surface of the base portion.

10. The vacuum pump according to claim 1 , wherein the cylindrical portion is constituted by a different member from the chassis of the control apparatus.

Assignees

• Edwards Japan Ltd

Inventors

• SAEGUSA Kengo

Classifications

• F04D29/522

  especially adapted for elastic fluid pumps · CPC title

• F04D29/70

  Suction grids; Strainers; Dust separation; Cleaning · CPC title

• F04D25/0693

  Details or arrangements of the wiring · CPC title

• F04D25/068

  Mechanical details of the pump control unit (pump control details F04D27/00) · CPC title

• F04D29/706

  Humidity separation · CPC title