Heat pump system and air conditioner

Abstract

A heat pump system ( 100 ) and an air conditioner are provided. The heat pump system ( 100 ) includes a compressor assembly ( 10 ), an outdoor heat exchanger ( 20 ), an indoor heat exchanger ( 30 ), a heating and heat accumulation device ( 50 ) and a switching device ( 40 ). The heating and heat accumulation device ( 50 ) is connected in series with the switching device ( 40 ). In the first heating mode, a refrigerant discharged out of the compressor assembly ( 10 ) enters the indoor heat exchanger ( 30 ) and the outdoor heat exchanger ( 20 ) in sequence after passing through the switching device ( 40 ) and the heating and heat accumulation device ( 50 ). In the defrosting mode, the refrigerant discharged out of the compressor assembly ( 10 ) enters the indoor heat exchanger ( 30 ), the outdoor heat exchanger ( 20 ) and the heating and heat accumulation device ( 50 ) in sequence after passing through the switching device ( 40 ).

1 . A heat pump system, comprising a compressor assembly, an outdoor heat exchanger and an indoor heat exchanger, wherein the heat pump system further comprises a heating and heat accumulation device and a switching device, wherein the compressor assembly, the switching device, the outdoor heat exchanger and the indoor heat exchanger are connected in sequence to form a refrigerating circuit, and the heating and heat accumulation device is connected in series with the switching device,
 wherein the heat pump system has a first heating mode, a second heating mode and a defrosting mode under the switch of the switching device; in the first heating mode, a refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device and the heating and heat accumulation device, and flows back to the compressor assembly; in the second heating mode, the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and flows back to the compressor assembly; in the defrosting mode, the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and the refrigerant flowing out of the outdoor heat exchanger flows back to the compressor assembly after passing through the heating and heat accumulation device.   
     
     
         2 . The heat pump system according to  claim 1 , wherein the switching device comprises a first four-way valve and a second four-way valve connected in series, the first four-way valve comprises first to fourth valve ports, the second four-way valve comprises fifth to eighth valve ports, the compressor assembly is communicated with the first valve port, the outdoor heat exchanger is communicated with the eighth valve port, the heating and heat accumulation device has a first end communicated with the fourth valve port and a second end communicated with the fifth valve port, the indoor heat exchanger is communicated with the second valve port and the sixth valve port, the third valve port and the seventh valve port are both communicated with a suction end of the compressor assembly;
 in the first heating mode, the first valve port of the first four-way valve is communicated with the fourth valve port of the first four-way valve, and the fifth valve port of the second four-way valve is communicated with the sixth valve port, the seventh valve port and the eighth valve port of the second four-way valve, respectively;   in the second heating mode, the first valve port of the first four-way valve is communicated with the second valve port of the first four-way valve, and the seventh valve port of the second four-way valve is communicated with the eighth valve port of the second four-way valve;   in the defrosting mode, the first valve port of the first four-way valve is communicated with the second valve port, the third valve port and the fourth valve port of the first four-way valve, respectively, and the fifth valve port of the second four-way valve is communicated with the eighth valve port of the second four-way valve.   
     
     
         3 . The heat pump system according to  claim 2 , wherein the switching device further comprises a first solenoid valve, and the first solenoid valve is arranged between the sixth valve port and the indoor heat exchanger. 
     
     
         4 . The heat pump system according to  claim 3 , wherein the heat pump system further comprises a first check valve, and the first check valve is connected between the outdoor heat exchanger and the heating and heat accumulation device. 
     
     
         5 . The heat pump system according to  claim 4 , wherein the heat pump system further comprises a throttling device, and the throttling device has a first end communicated with the heating and heat accumulation device and a second end communicated with the fifth valve port and the first check valve. 
     
     
         6 . The heat pump system according to  claim 2 , wherein the heat pump system further comprises a second check valve, and the second check valve is connected between the second valve port and the indoor heat exchanger. 
     
     
         7 . The heat pump system according to  claim 6 , wherein the heat pump system further has a refrigeration mode under a switch of the switching device, and in the refrigeration mode, the first valve port of the first four-way valve is communicated with the fourth valve port of the first four-way valve, the fifth valve port of the second four-way valve is communicated with the eighth valve port, the sixth valve port and the seventh valve port of the second four-way valve, respectively. 
     
     
         8 . The heat pump system according to  claim 1 , wherein the heating and heat accumulation device comprises a second solenoid valve and a heat exchanger, and the heat exchanger is connected in series with the second solenoid valve and communicated with the switching device;
 the heating and heat accumulation device further comprises a heating assembly and a heat accumulation assembly arranged to an outer wall of the heat exchanger.   
     
     
         9 . The heat pump system according to  claim 8 , wherein the heating assembly is configured as an exogenous heater; and
 the heat accumulation assembly is configured as a heat accumulator.   
     
     
         10 . An air conditioner, comprising a heat pump system, comprising:
 a compressor assembly, an outdoor heat exchanger and an indoor heat exchanger, wherein the heat pump system further comprises a heating and heat accumulation device and a switching device, the compressor assembly, the switching device, the outdoor heat exchanger and the indoor heat exchanger are connected in sequence to form a refrigerating circuit, and the heating and heat accumulation device is connected in series with the switching device, and   wherein the heat pump system has a first heating mode, a second heating mode and a defrosting mode under a switch of the switching device, in the first heating mode, a refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device and the heating and heat accumulation device, and flows back to the compressor assembly; in the second heating mode, the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and flows back to the compressor assembly; in the defrosting mode, the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and the refrigerant flowing out of the outdoor heat exchanger flows back to the compressor assembly after passing through the heating and heat accumulation device.