Heat pump system

Abstract

The present application provides a heat pump system. The heat pump system comprises a main circulating refrigerant loop, an auxiliary circulating refrigerant loop, and a refrigerant management system; the main circulating refrigerant loop comprises a main compressor, a first main heat exchanger, a main throttling device, and a second main heat exchanger, the main compressor is configured to allow a refrigerant in the main circulating refrigerant loop to circulate in a main circulating refrigeration working condition flow direction or circulate in a main circulating heating working condition flow direction. The auxiliary circulating refrigerant loop comprises an auxiliary compressor, a first auxiliary heat exchanger, an auxiliary throttling device, and a second auxiliary heat exchanger; the auxiliary compressor is configured to allow a refrigerant in the auxiliary circulating refrigerant loop to circulate in an auxiliary circulating heating working condition flow direction. The refrigerant management system is controllably connected to or disconnected from the main circulating refrigerant loop and the auxiliary circulating refrigerant loop, separately; the refrigerant management system is configured to be capable of distributing a refrigerant used for the main circulating refrigerant loop to the auxiliary circulating refrigerant loop. Less refrigerant is used in the heat pump system provided by the present application.

1 . A heat pump system, characterized by comprising:
 a main circulating refrigerant loop ( 101 ), the main circulating refrigerant loop ( 101 ) having a main compressor ( 111 ), a first main heat exchanger ( 112 ), a main throttling device ( 114 ) and a second main heat exchanger ( 116 ), wherein the main compressor ( 111 ) is configured to allow a refrigerant in the main circulating refrigerant loop ( 101 ) to circulate in a main circulating refrigeration working condition flow direction or circulate in a main circulating heating working condition flow direction that is opposite to the main circulating refrigeration working condition flow direction;   an auxiliary circulating refrigerant loop ( 102 ), the auxiliary circulating refrigerant loop ( 102 ) comprising an auxiliary compressor ( 121 ), a first auxiliary heat exchanger ( 122 ), an auxiliary throttling device ( 124 ) and a second auxiliary heat exchanger ( 126 ), wherein the auxiliary compressor ( 121 ) is configured to allow a refrigerant in the auxiliary circulating refrigerant loop ( 102 ) to circulate in an auxiliary circulating heating working condition flow direction; and   a refrigerant management system ( 103 ), wherein the refrigerant management system ( 103 ) is controllably connected to or disconnected from the main circulating refrigerant loop ( 101 ) and the auxiliary circulating refrigerant loop ( 102 ), separately; and the refrigerant management system ( 103 ) is configured to be capable of distributing a refrigerant used for the main circulating refrigerant loop ( 101 ) to the auxiliary circulating refrigerant loop ( 102 ).   
     
     
         2 . The heat pump system according to  claim 1 , characterized in that:
 the heat pump system has a refrigeration working mode, a heating working mode and an auxiliary heating working mode;   in the refrigeration working mode, the refrigerant in the main circulating refrigerant loop ( 101 ) circulates in the main circulating refrigeration working condition flow direction, and the auxiliary compressor ( 121 ) is turned off;   in the heating working mode, the refrigerant in the main circulating refrigerant loop ( 101 ) circulates in the main circulating heating working condition flow direction, and the auxiliary compressor ( 121 ) is turned off; and   in the auxiliary heating working mode, the refrigerant in the main circulating refrigerant loop ( 101 ) circulates in the main circulating heating working condition flow direction, and the refrigerant in the auxiliary circulating refrigerant loop ( 102 ) circulates in the auxiliary circulating heating working condition flow direction.   
     
     
         3 . The pump system according to  claim 2 , characterized in that:
 the refrigerant management system ( 103 ) is configured to be capable of introducing part of the refrigerant used in the main circulating refrigerant loop ( 101 ) into the auxiliary circulating refrigerant loop ( 102 ) when the auxiliary heating working mode is turned on.   
     
     
         4 . The heat pump system according to  claim 3 , characterized in that:
 the refrigerant management system ( 103 ) comprises a refrigerant storage device ( 531 ), the refrigerant storage device ( 531 ) being configured to be capable of collecting the refrigerant drawn from the main circulating refrigerant loop ( 101 ) and introducing the collected refrigerant into the auxiliary circulating refrigerant loop ( 102 ).   
     
     
         5 . The heat pump system according to  claim 4 , characterized in that:
 the refrigerant management system ( 103 ) further comprises:
 a main liquid introduction pipeline ( 511 ) connected between the refrigerant storage device ( 531 ) and a low-pressure side of the main circulating refrigerant loop ( 101 ); 
 a main liquid discharge pipeline ( 512 ) connected between the refrigerant storage device ( 531 ) and a high-pressure side of the main circulating refrigerant loop ( 101 ); 
 an auxiliary liquid introduction pipeline ( 513 ) connected between the refrigerant storage device ( 531 ) and a low-pressure side of the auxiliary circulating refrigerant loop ( 102 ); and 
 an auxiliary liquid discharge pipeline ( 514 ) connected between the refrigerant storage device ( 531 ) and a high-pressure side of the auxiliary circulating refrigerant loop ( 102 ). 
   
     
     
         6 . The heat pump system according to  claim 1 , characterized in that:
 the second auxiliary heat exchanger ( 126 ) has a first fluid channel ( 137 ) and a second fluid channel ( 138 ), wherein the first fluid channel ( 137 ) is connected in the main circulating refrigerant loop ( 101 ), the second fluid channel ( 138 ) is connected in the auxiliary circulating refrigerant loop ( 102 ), and wherein the refrigerants in the first fluid channel ( 137 ) and the second fluid channel ( 138 ) are capable of exchanging heat.   
     
     
         7 . The heat pump system according to  claim 1 , characterized in that:
 the first main heat exchanger ( 112 ) and the first auxiliary heat exchanger ( 122 ) are both water-side heat exchangers, the first main heat exchanger ( 112 ) has a first water channel ( 141 ), the first auxiliary heat exchanger ( 122 ) has a second water channel ( 142 ), and the first water channel ( 141 ) connects with the second water channel ( 142 ), so that water can flow from the first water channel ( 141 ) to the second water channel ( 142 ).   
     
     
         8 . The pump system according to  claim 5 , characterized in that:
 the main liquid introduction pipeline ( 511 ), the main liquid discharge pipeline ( 512 ), the auxiliary liquid introduction pipeline ( 513 ) and the auxiliary liquid discharge pipeline ( 514 ) are respectively provided with corresponding solenoid valves for respectively controlling connection and disconnection of the pipeline; and   the main liquid introduction pipeline ( 511 ) and the auxiliary liquid introduction pipeline ( 513 ) are respectively provided with a liquid introduction one-way valve being configured to allow the refrigerant to flow only in a direction of discharging from the refrigerant storage device ( 531 ), and the main liquid discharge pipeline ( 512 ) and the auxiliary liquid discharge pipeline ( 514 ) are respectively provided with a liquid discharge one-way valve being configured to allow the refrigerant to flow only in a direction of discharging toward the refrigerant storage device ( 531 ).   
     
     
         9 . The heat pump system according to  claim 8 , characterized by further comprising:
 a control device ( 550 ), wherein the control device ( 550 ) is connected to corresponding solenoid valves on the main liquid introduction pipeline ( 511 ), the main liquid discharge pipeline ( 512 ), the auxiliary liquid introduction pipeline ( 513 ) and the auxiliary liquid discharge pipeline ( 514 ), respectively, and can control the connection and disconnection of each solenoid valve; and the control device ( 550 ) is connected to the main compressor ( 111 ) and the auxiliary compressor ( 121 ), and can control the on and off of the main compressor ( 111 ) and the auxiliary compressor ( 121 ).   
     
     
         10 . The heat pump system according to  claim 1 , characterized in that:
 the ratio range of the air displacement of the main compressor ( 111 ) to the air displacement of the auxiliary compressor ( 121 ) is (2-4):1.