Vacuum pump with abatement function

Patent metadata

Field	Value
Publication number	US-10641272-B2
Application number	US-201514644135-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	Mar 17, 2014
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A vacuum pump with abatement function which can prevent contamination of a process chamber without allowing products generated by exhaust gas treatment to flow back to the process chamber, and can reduce the amount of gas to be treated without allowing a purge gas and a diluent gas to be contained in an exhaust gas, and thus can achieve energy saving by reducing the amount of energy required for the exhaust gas treatment in an abatement part is disclosed. The vacuum pump with abatement function includes a vacuum pump to which at least one abatement part for treating an exhaust gas is attached. The vacuum pump comprises a dry vacuum pump having a pair of multistage pump rotors each of which comprises a plurality of rotors arranged on a rotating shaft, and the at least one abatement part is connected to an interstage of the multistage pump rotors.

First claim

What is claimed is:

1. A vacuum pump with abatement function comprising:
a dry vacuum pump having a pair of multistage pump rotors each of which comprises a plurality of rotors arranged on a rotating shaft; and
a plurality of abatement parts for treating an exhaust gas integrated with the dry vacuum pump via a single common wall;
wherein the vacuum pump with abatement function is configured such that the dry vacuum pump and the plurality of abatement parts are integrated by allowing boundary parts between the dry vacuum pump and the plurality of abatement parts to be constructed of the single common wall, heat conductivity between the dry vacuum pump and the plurality of abatement parts being ensured by the single common wall between the dry vacuum pump and the plurality of abatement parts;
wherein heat generated in the plurality of abatement parts heats the vacuum pump by said heat conductivity; and
wherein one of the plurality of abatement parts comprises plural abatement parts which are arranged in parallel to have a back-up function among the plural abatement parts.

2. The vacuum pump with abatement function according to claim 1 , wherein the plurality of abatement parts comprise a plasma-type abatement part, a dry-type abatement part, a catalytic-type abatement part, or a heater-type abatement part.

3. The vacuum pump with abatement function according to claim 1 , wherein the vacuum pump with abatement function comprises an enclosure configured to house the plurality of abatement parts, and an exhaust part configured to connect the enclosure to an exhaust duct.

4. The vacuum pump with abatement function according to claim 1 , wherein the single common wall comprises a connecting block.

5. The vacuum pump with abatement function according to claim 1 , wherein the plurality of abatement parts comprise abatement parts having different treatment types of exhaust gas and/or different treatment amounts of exhaust gas and/or different treatment performances of exhaust gas.

6. The vacuum pump with abatement function according to claim 1 , wherein a controller configured to collectively control the dry vacuum pump and the plurality of abatement parts is provided in the vacuum pump with abatement function.

7. The vacuum pump with abatement function according to claim 1 , wherein the dry vacuum pump comprises a single dry vacuum pump or a plurality of dry vacuum pumps connected in series and/or in parallel, and the plurality of abatement parts are connected to the interstages of the multistage pump rotors of at least one of the dry vacuum pumps.

8. The vacuum pump with abatement function according to claim 1 , wherein an output power of an inverter used for driving the dry vacuum pump is monitored, and an operational state of the plurality of abatement parts is changed based on a value of the output power.

9. A vacuum pump with abatement function comprising:
a dry vacuum pump having a pair of multistage pump rotors each of which comprises a plurality of rotors arranged on a rotating shaft; and
a plurality of abatement parts for making an exhaust gas harmless, the plurality of abatement parts integrated with the dry vacuum pump via a single common wall;
wherein the vacuum pump with abatement function is configured such that the dry vacuum pump and the plurality of abatement parts are integrated by allowing boundary parts between the dry vacuum pump and the plurality of abatement parts to be constructed of the single common wall, heat conductivity between the dry vacuum pump and the plurality of abatement parts being ensured by the single common wall between the dry vacuum pump and the plurality of abatement parts; and
wherein one of the plurality of abatement parts comprises plural abatement parts which are arranged in parallel to have a back-up function among the plural abatement parts.

10. The vacuum pump with abatement function according to claim 9 , wherein the dry vacuum pump comprises a single dry vacuum pump or a plurality of dry vacuum pumps connected in series and/or in parallel, and the plurality of abatement parts are connected to the interstages of the multistage pump rotors of at least one of the dry vacuum pumps.

11. The vacuum pump with abatement function according to claim 9 , wherein an output power of an inverter used for driving the dry vacuum pump is monitored, and an operational state of the plurality of abatement parts is changed based on a value of the output power.

12. The vacuum pump with abatement function according to claim 9 , wherein the vacuum pump with abatement function comprises an enclosure configured to house the plurality of abatement parts, and an exhaust part configured to connect the enclosure to an exhaust duct.

13. The vacuum pump with abatement function according to claim 9 , wherein the single common wall comprises a connecting block.

14. The vacuum pump with abatement function according to claim 9 , wherein the plurality of abatement parts comprise a plasma-type abatement part, a dry-type abatement part, a catalytic-type abatement part, or a heater-type abatement part.

15. The vacuum pump with abatement function according to claim 9 , wherein the plurality of abatement parts comprise abatement parts having different treatment types of exhaust gas and/or different treatment amounts of exhaust gas and/or different treatment performances of exhaust gas.

16. The vacuum pump with abatement function according to claim 9 , wherein a controller configured to collectively control the dry vacuum pump and the plurality of abatement parts is provided in the vacuum pump with abatement function.

Assignees

• Ebara Corp

Inventors

• Iwasaki Koichi
• Furuta Hiroki
• Ishikawa Keiichi
• Komai Tetsuo
• Sekiguchi Shinichi

Classifications

• B01D53/26

  Drying gases or vapours · CPC title

• B01D2257/2027

  Fluorine · CPC title

• B01D53/8662

  Organic halogen compounds · CPC title

• B01D2257/2045

  Hydrochloric acid · CPC title

• F04D19/04 Primary

  specially adapted to the production of a high vacuum, e.g. molecular pumps · CPC title