Refrigeration cycle apparatus

Abstract

A refrigeration cycle apparatus includes a compressor, a first heat exchanger, a decompressing device, a second heat exchanger, a first switching valve, a second switching valve, and a controller. The first switching valve is switched to one of a first state and a second state. The second switching valve is switched to one of a third state, a fourth state, and a fifth state. When switching to a second cooling operation to bring the first and second switching valves into the second and fourth states respectively, is requested during a first cooling operation to bring the first and second switching valves into the first and third states, respectively, the controller performs a first switching operation to bring the first switching valve into the second state and bring the second switching valve into the fifth state, and thereafter switches the first switching operation to the second cooling operation.

1 . A refrigeration cycle apparatus switchable between a first operation and a second operation, the first operation being an operation in which refrigerant circulates in order of a compressor, a first heat exchanger, a decompressing device, and a second heat exchanger, and the second operation being an operation in which the refrigerant circulates in order of the compressor, the second heat exchanger, the decompressing device, and the first heat exchanger, the refrigeration cycle apparatus comprising:
 a first switching valve connected to a discharge port of the compressor, one port of the first heat exchanger, one port of the second heat exchanger, and one port of the decompressing device;   a second switching valve connected to a suction port of the compressor, the other port of the first heat exchanger, the other port of the second heat exchanger, and the other port of the decompressing device; and   a controller configured to control the first switching valve and the second switching valve; wherein   the first switching valve is configured to be switchable to one of a first state and a second state,
 in the first state, the discharge port of the compressor is connected to the one port of the first heat exchanger, and the one port of the second heat exchanger is connected to the one port of the decompressing device, and 
 in the second state, the discharge port of the compressor is connected to the one port of the second heat exchanger, and the one port of the first heat exchanger is connected to the one port of the decompressing device, 
   the second switching valve is configured to be switchable to one of a third state, a fourth state, and a fifth state,
 in the third state, the other port of the first heat exchanger is connected to the other port of the decompressing device, and the other port of the second heat exchanger is connected to the suction port of the compressor, 
 in the fourth state, the other port of the second heat exchanger is connected to the other port of the decompressing device, and the other port of the first heat exchanger is connected to the suction port of the compressor, and 
 in the fifth state, the other port of the decompressing device is connected to the suction port of the compressor, and the other port of the first heat exchanger is disconnected from the other port of the second heat exchanger, 
   the controller is configured to
 set the first switching valve to the first state and set the second switching valve to the third state during the first operation, and 
 set the first switching valve to the second state and set the second switching valve to the fourth state during the second operation, and 
   when switching to the second operation is requested during the first operation, the controller is configured to
 perform a first switching operation to bring the first switching valve into the second state and bring the second switching valve into the fifth state, and 
 switch an operation of the refrigeration cycle apparatus to the second operation after performing the first switching operation. 
   
     
     
         2 . The refrigeration cycle apparatus according to  claim 1 , wherein
 when switching to the first operation is requested during the second operation, the controller is configured to   perform a second switching operation to bring the first switching valve into the first state and bring the second switching valve into the fifth state, and   switch the operation of the refrigeration cycle apparatus to the first operation after performing the second switching operation.   
     
     
         3 . The refrigeration cycle apparatus according to  claim 2 , further comprising an air blower configured to be capable of blowing air to the first heat exchanger and the second heat exchanger, wherein
 the controller is configured to control the air blower to stop bloc blowing air to the first heat exchanger and the second heat exchanger during the first switching operation and the second switching operation.   
     
     
         4 . The refrigeration cycle apparatus according to  claim 3 , wherein
 the air blower comprises a first air blower configured to be capable of switching a supply destination of indoor air to be cooled to one of the first heat exchanger and the second heat exchanger, and   the controller is configured to control the first air blower to
 set the supply destination of the indoor air to the second heat exchanger during the first operation, and 
 set the supply destination of the indoor air to the first heat exchanger during the second operation. 
   
     
     
         5 . The refrigeration cycle apparatus according to  claim 4 , wherein
 the air blower comprises a second air blower configured to be capable of switching a supply destination of outdoor air not to he cooled to one of the first heat exchanger and the second heat exchanger, and   the controller is configured to control the second air blower to
 set the supply destination of the outdoor air to the first heat exchanger during the first operation, and 
 set the supply destination of the outdoor air to the second heat exchanger during the second operation. 
   
     
     
         6 . The refrigeration cycle apparatus according to  claim 4 , further comprising a second decompressing device and a third heat exchanger that are disposed between the second switching valve and the suction port of the compressor. 
     
     
         7 . The refrigeration cycle apparatus according to  claim 6 , wherein the indoor air is blown in order of the second heat exchanger and the third heat exchanger during the first operation, and blown in order of the first heat exchanger and the third heat exchanger during the second operation. 
     
     
         8 . The refrigeration cycle apparatus according to  claim 7 , wherein the first heat exchanger and the second heat exchanger each have a surface onto which an adsorbent serving to adsorb moisture in air is applied. 
     
     
         9 . The refrigeration cycle apparatus according to  claim 6 , further comprising a fourth heat exchanger disposed between the discharge port of the compressor and the first switching valve.