Chiller and air conditioning system

Abstract

A chiller comprises compressors, a condenser, a first throttling element, and an evaporator, wherein the compressors comprise a first EVI compressor and a second EVI compressor, which are connected in parallel. The chiller further comprises a second throttling element, a third throttling element, an economizer, a first manifold and a second manifold, wherein the economizer comprises a first heat-exchange passage, a second heat-exchange passage and a third heat-exchange passage, the second heat-exchange passage, the first heat-exchange passage is connected between the condenser and the first throttling valve, the first manifold is sequentially connected to the second throttling element, the second heat-exchange passage and the first supplement port, and the second manifold is sequentially connected to the third throttling element, the third heat-exchange passage and the second supplement port.

1 . A chiller, comprising compressors, a condenser, a first throttling element and an evaporator, the compressors comprising a first EVI compressor and a second EVI compressor which are connected in parallel, the first EVI compressor being provided with a first supplement port, and the second EVI compressor being provided with a second supplement port, wherein the chiller further comprises:
 a second throttling element;   a third throttling element;   an economizer, comprising a first heat-exchange passage, a second heat-exchange passage and a third heat-exchange passage, the second heat-exchange passage and the third heat-exchange passage exchanging heat with the first heat-exchange passage, and the first heat-exchange passage being connected between the condenser and the first throttling valve;   a first manifold, connected between the first throttling element and the condenser and sequentially connected to the second throttling element, the second heat-exchange passage and the first supplement port; and   a second manifold, connected between the first throttling element and the condenser and sequentially connected to the third throttling element, the third heat-exchange passage and the second supplement port.   
     
     
         2 . The chiller according to  claim 1 , wherein the first manifold and the second manifold are connected between the first throttling element and the first heat-exchange passage. 
     
     
         3 . The chiller according to  claim 1 , wherein the first manifold and the second manifold are connected between the condenser and the first heat-exchange passage. 
     
     
         4 . The chiller according to  claim 1 , wherein no electromagnetic valve is arranged between the first supplement port and the second heat-exchange passage, and no electromagnetic valve is arranged between the second supplement port and the third heat-exchange passage. 
     
     
         5 . The chiller according to  claim 1 , wherein the economizer is a plate heat exchanger. 
     
     
         6 . The chiller, according to  claim 1 , is wherein one of the first EVI compressor and the second EVI compressor are started, or the first EVI compressor and the second EVI compressor are started synchronously. 
     
     
         7 . An air conditioning system, comprising the chiller according to  claim 1 . 
     
     
         8 . A method of using the chiller according to  claim 1 .