Rotary compressor with vapor injection system

Patent metadata

Field	Value
Publication number	US-10344761-B2
Application number	US-201815935608-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Oct 29, 2013
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A compressor may include a crankshaft, first and second cylinder housings, first and second rotors, a divider plate, and first and second valves. The crankshaft includes first and second eccentric portions. The cylinder housings define cylindrical recesses. The rotors are disposed within respective cylindrical recesses and engage respective eccentric portions of the crankshaft. The first rotor and the first cylindrical recess define a first compression chamber therebetween. The second rotor and the second cylindrical recess define a second compression chamber therebetween. The divider plate may be disposed between the cylinder housings and may include first and second fluid openings in communication with the first and second compression chambers. The valves may be moveable relative to the divider plate between a first position allowing fluid flow through the fluid openings and a second position restricting fluid flow through the fluid openings.

First claim

What is claimed is:

1. A compressor comprising:
a crankshaft including an eccentric portion;
a cylinder housing defining a cylindrical recess through which the crankshaft extends;
a rotor disposed within said cylindrical recess and engaging said eccentric portion of said crankshaft for movement with said crankshaft relative to said cylindrical recess, said rotor and a circumferential surface of said cylindrical recess defining a compression chamber therebetween;
a suction opening providing fluid at a first pressure to said cylindrical recess;
a discharge opening receiving compressed fluid from said compression chamber;
a fluid-injection passageway providing fluid at a second pressure to said compression chamber via a fluid-injection opening, said second pressure being higher than said first pressure;
a valve movable relative to said cylindrical recess between a first position allowing fluid flow from said fluid-injection passageway to said fluid-injection opening and a second position restricting fluid flow from said fluid-injection passageway to said fluid-injection opening; and
a recess in fluid communication with said fluid-injection opening.

2. The compressor of claim 1 , wherein said fluid-injection opening is formed in a plate disposed axially adjacent said cylinder housing and partially defining said compression chamber.

3. The compressor of claim 2 , wherein said plate is disposed axially between said cylinder housing and another cylinder housing and partially defines another compression chamber.

4. The compressor of claim 3 , wherein said recess is disposed in said plate, and wherein the compressor further comprises another recess disposed in said cylinder housing, said recesses are in fluid communication with each other.

5. The compressor of claim 1 , wherein said recess is disposed radially outward relative to said fluid-injection opening.

6. The compressor of claim 5 , wherein said valve is disposed radially between said recess and said fluid-injection opening.

7. The compressor of claim 1 , wherein said recess is in fluid communication with said fluid-injection opening while said valve is in said second position.

8. The compressor of claim 1 , wherein said valve is disposed radially between said fluid-injection opening and said recess.

9. The compressor of claim 1 , wherein said fluid-injection opening and said discharge opening are at least partially aligned with each other in a direction parallel to a rotational axis of said crankshaft.

10. The compressor of claim 1 , wherein said fluid-injection opening is at least partially axially aligned with said circumferential surface of said cylindrical recess.

11. A compressor comprising:
a crankshaft including first and second eccentric portions;
first and second cylinder housings defining first and second cylindrical recesses, respectively, through which the crankshaft extends;
a first rotor disposed within said first cylindrical recess and engaging said first eccentric portion of said crankshaft for movement with said crankshaft relative to said first cylindrical recess, said first rotor and a first circumferential surface of said first cylindrical recess defining a first compression chamber therebetween;
a second rotor disposed within said second cylindrical recess and engaging said second eccentric portion of said crankshaft for movement with said crankshaft relative to said second cylindrical recess, said second rotor and a second circumferential surface of said second cylindrical recess defining a second compression chamber therebetween;
a first fluid-injection passageway in communication with said first compression chamber via a first fluid-injection opening;
a second fluid-injection passageway in communication with said second compression chamber via a second fluid-injection opening;
a first valve moveable between a first position allowing fluid flow from said first fluid-injection passageway to said first fluid-injection opening and a second position restricting fluid flow from said first fluid-injection passageway to said first fluid-injection opening;
a second valve moveable between a first position allowing fluid flow from said second fluid-injection passageway to said second fluid-injection opening and a second position restricting fluid flow from said second fluid-injection passageway to said second fluid-injection opening; and
first and second recesses in fluid communication with said first and second fluid-injection openings, respectively.

12. The compressor of claim 11 , wherein said first recess is in fluid communication with said first fluid-injection opening while said first valve is in said second position, and wherein said second recess is in fluid communication with said second fluid-injection opening while said second valve is in said second position.

13. The compressor of claim 11 , wherein said first and second recesses are disposed radially outward relative to said first and second fluid-injection openings.

14. The compressor of claim 13 , wherein said first valve is disposed radially between said first fluid-injection opening and said first recess, and said second valve is disposed radially between said second fluid-injection opening and second first recess.

15. The compressor of claim 11 , further comprising a divider plate disposed axially between said first and second cylinder housings, wherein said first and second fluid-injection openings and said first and second recesses are disposed within said divider plate.

16. The compressor of claim 15 , further comprising third and fourth recesses in fluid communication with said first and second recesses, respectively, said third recess disposed in said first cylinder housing, said fourth recess disposed in said second cylinder housing.

17. The compressor of claim 15 , wherein said first and second valves are spring-biased in opposite directions.

18. The compressor of claim 11 , further comprising:
a suction opening providing fluid at a first pressure to said first cylindrical recess; and
a discharge opening receiving compressed fluid from said first compression chamber,
wherein said first and second fluid-injection openings provide fluid at a second pressure to said first and second compression chambers, respectively, said second pressure being higher than said first pressure.

19. The compressor of claim 18 , wherein said first and second fluid-injection openings and said discharge opening are at least partially aligned with each other in a direction parallel to a rotational axis of said crankshaft such that said discharge opening and said first and second fluid-injection openings are at least partially disposed along a plane extending through said rotational axis.

20. The compressor of claim 18 , wherein said first and second fluid-injection openings are at least partially axially aligned with said first and second circumferential surfaces.

Assignees

• Emerson Climate Technologies

Inventors

• Ignatiev Kirill M
• Perevozchikov Michael M

Classifications

• F01C1/46

  with vanes hinged to the outer member · CPC title

• H01R24/20

  Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable · CPC title

• F04C28/12

  using sliding valves · CPC title

• H01R24/28

  Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable · CPC title

• F04C28/28 Primary

  Safety arrangements; Monitoring · CPC title