Compressor and Air Conditioning System

Abstract

A compressor and an air conditioning system. The compressor includes a low-pressure-stage compressor body and a high-pressure-stage compressor body, where the low-pressure-stage compressor body is provided with a low-pressure-stage suction port and a low-pressure-stage exhaust port, the high-pressure-stage compressor body is provided with a high-pressure-stage suction port and a high-pressure-stage exhaust port, a communication pipeline is arranged between the low-pressure-stage exhaust port and the high-pressure-stage suction port, the low-pressure-stage suction port communicates with a low-pressure-stage gas source, and the high-pressure-stage suction port has a first state of communication with the low-pressure-stage exhaust port and a second state of communication with the low-pressure-stage gas source.

1 . A compressor, comprising:
 a low-pressure-stage compressor body with a low-pressure-stage suction port and a low-pressure-stage exhaust port, wherein the low-pressure-stage suction port is configured to communicate with a low-pressure-stage gas source;
 a high-pressure-stage compressor body with a high-pressure-stage suction port and a high-pressure-stage exhaust port; and 
 a communication pipeline arranged between the low-pressure-stage exhaust port and the high-pressure-stage suction port, wherein the high-pressure-stage suction port has a first state of communication with the low-pressure-stage exhaust port and a second state of communication with the low-pressure-stage gas source. 
   
     
     
         2 . The compressor according to  claim 1 , wherein the communication pipeline is provided with a three-way valve, and a first inlet of the three-way valve communicates with the low-pressure-stage exhaust port; a second inlet of the three-way valve is configured to communicate with the low-pressure-stage gas source; an outlet of the three-way valve communicates with the high-pressure-stage exhaust port; in the first state, the first inlet communicates with the outlet; and in the second state, the second inlet communicates with the outlet. 
     
     
         3 . The compressor according to  claim 2 , wherein the compressor is provided with a suction port, a low pressure outlet and a high pressure outlet, the suction port is configured to communicate with the low-pressure-stage gas source, and the low-pressure-stage suction port and the second inlet communicate with the suction port; in the first state, the low pressure outlet communicates with the low-pressure-stage exhaust port, and the high pressure outlet communicates with the high-pressure-stage exhaust port; and in the second state, the low pressure outlet communicates with the low-pressure-stage exhaust port and the high-pressure-stage exhaust port respectively. 
     
     
         4 . The compressor according to  claim 3 , wherein the low-pressure-stage compressor body has the same internal pressure ratio as the high-pressure-stage compressor body. 
     
     
         5 . The compressor according to  claim 1 , wherein a working mode of the compressor comprises a heating mode and a cooling mode;
 in the heating mode, the high-pressure-stage suction port is in the first state, and the collective result of the internal pressure ratio of the low-pressure-stage compressor body and high-pressure-stage compressor body satisfies the requirement of the heating mode; and   in the cooling mode, the high-pressure-stage suction port in the second state, and each of the internal pressure ratios of the low-pressure-stage compressor body and the high-pressure-stage compressor body satisfies the requirement of the cooling mode.   
     
     
         6 . The compressor according to  claim 1 , wherein a working mode of the compressor comprises a first heating mode and a second heating mode;
 in the first heating mode, the high-pressure-stage suction port is in the second state, and each of the internal pressure ratios of the low-pressure-stage compressor body and the high-pressure-stage compressor body satisfies the requirement of the heating mode; and   in the second heating mode, the high-pressure-stage suction port is in the first state, and the collective result of the internal pressure ratios of the low-pressure-stage compressor body and high-pressure-stage compressor body satisfies the requirement of the second heating mode.   
     
     
         7 . The compressor according to  claim 1 , further comprising a motor, wherein the motor is arranged between the low-pressure-stage compressor body and the high-pressure-stage compressor body and connected with the low-pressure-stage compressor body and the high-pressure-stage compressor body. 
     
     
         8 . The compressor according to  claim 7 , wherein the low-pressure-stage suction port is arranged at an end of the low-pressure-stage compressor body away from the motor, the low-pressure-stage exhaust port is arranged at an end of the low-pressure-stage compressor body close to the motor, the high-pressure-stage suction port is arranged at an end of the high-pressure-stage compressor body close to the motor, and the high-pressure-stage exhaust port is arranged at an end of the high-pressure-stage compressor body away from the motor. 
     
     
         9 . An air conditioning system, comprising the compressor according to  claim 1 . 
     
     
         10 . An air conditioning system, comprising the compressor according to  claim 4 . 
     
     
         11 . An air conditioning system, comprising the compressor according to  claim 8 .