Two-stage screw compressor and air conditioning system

Patent metadata

Field	Value
Publication number	US-11674512-B2
Application number	US-202217702322-A
Country	US
Kind code	B2
Filing date	Mar 23, 2022
Priority date	Mar 25, 2021
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A two-stage screw compressor and an air conditioning system. The two-stage screw compressor includes: a housing with an intake port and an exhaust port provided thereon; a low-pressure stage screw set axially arranged in the housing and connected to the intake port; a high-pressure stage screw set axially arranged in the housing and connected to the exhaust port; a drive motor axially arranged in the housing; and a transmission gear set for simultaneously transmitting a torque provided by the drive motor to the low-pressure stage screw set and the high-pressure stage screw set; wherein, the drive motor, the low-pressure stage screw set and the high-pressure stage screw set are axially arranged on the same side of the transmission gear set.

First claim

What is claimed is:

1. A two-stage screw compressor, comprising:
a housing with an intake port and an exhaust port provided thereon;
a low-pressure stage screw set axially arranged in the housing and connected to the intake port;
a high-pressure stage screw set axially arranged in the housing and connected to the exhaust port;
a drive motor; and
a transmission gear set for simultaneously transmitting a torque provided by the drive motor to the low-pressure stage screw set and the high-pressure stage screw set;
wherein, the drive motor, the low-pressure stage screw set and the high-pressure stage screw set are axially arranged on the same side of the transmission gear set;
wherein, a compression flow path passing in sequence through the intake port, a first cavity for accommodating the low-pressure stage screw set, a second cavity for accommodating the drive motor, a third cavity for accommodating the high-pressure stage screw set, and the exhaust port is formed in the housing.

2. The two-stage screw compressor according to claim 1 , wherein the low-pressure stage screw set and the high-pressure stage screw set are arranged on the same side of a vertical plane where the axis of the drive motor is located.

3. The two-stage screw compressor according to claim 2 , wherein the low-pressure stage screw set is arranged at a lower part of the high-pressure stage screw set.

4. The two-stage screw compressor according to claim 1 , wherein the transmission gear set comprises:
a driving gear connected to the drive motor;
a low-pressure stage driven gear connected to a low-pressure stage driving screw of the low-pressure stage screw set; and
a high-pressure stage driven gear connected to a high-pressure stage driving screw of the high-pressure stage screw set;
wherein, the gear ratio of the driving gear to the low-pressure stage driven gear is greater than the gear ratio of the driving gear to the high-pressure stage driven gear.

5. The two-stage screw compressor according to claim 4 , wherein,
the gear ratio of the driving gear to the low-pressure stage driven gear is 1:1 to 10:1; and/or
the gear ratio of the driving gear to the high-pressure stage driven gear is 0.5:1 to 9:1.

6. The two-stage screw compressor according to claim 1 , wherein an intermediate-stage air supplement port connected to the second cavity is further provided on the housing.

7. The two-stage screw compressor according to claim 1 , wherein the intake port is radially connected to the low-pressure stage driving screw of the low-pressure stage screw set.

8. The two-stage screw compressor according to claim 1 , wherein the exhaust port is axially connected to the high-pressure stage driven screw of the high-pressure stage screw set.

9. An air conditioning system, comprising: the two-stage screw compressor according to claim 1 .

Assignees

• Carrier Corp

Inventors

• Wu Hu

Classifications

• F04C29/005

  Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F01C21/007

  General arrangements of parts; Frames and supporting elements · CPC title

• F04C18/16 Primary

  with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F04C18/48)} · CPC title

• F04C23/001

  of similar working principle · CPC title