Operation control device for air conditioner

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• heat-storage operating means (13) for deactivating the used-side fan (6f) when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby implementing heat storage;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed and whether the heat storage by the heat-storage operating means (13) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• thermal-source-side temperature sensing means (Thc) for sensing a refrigerant temperature Tc of the thermal-source-side heat exchanger (3), wherein the completion determining means (14) receives a sensed temperature signal from the thermal-source-side temperature sensing means (Thc) and outputs a completion signal when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) at the present time drops to or more than a specified difference from a reference refrigerant temperature Tcl of the thermal-source-side heat exchanger (3) at the time before the expansion mechanism (5) is fully closed.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• thermal-source-side temperature sensing means (Thc) for sensing a refrigerant temperature Tc of the thermal-source-side heat exchanger (3), wherein the completion determining means (14) receives a sensed temperature signal from the thermal-source-side temperature sensing means (Thc) and outputs a completion signal when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) drops to or below a specified temperature.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• heat-storage operating means (13) for deactivating the used-side fan (6f) when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby implementing heat storage;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed and whether the heat storage by the heat-storage operating means (13) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• thermal-source-side temperature sensing means (Thc) for sensing a refrigerant temperature Tc of the thermal-source-side heat exchanger (3), wherein the completion determining means (14) receives a sensed temperature signal from the thermal-source-side temperature sensing means (Thc) and outputs a completion signal when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) drops to or below a specified temperature.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• used-side temperature sensing means (The) for sensing a refrigerant temperature Te of the used-side heat exchanger (6), wherein the completion determining means (14) receives a sensed temperature signal from the used-side temperature sensing means (The) and outputs a completion signal when the refrigerant temperature Te of the used-side heat exchanger (6) rises to or above a specified temperature.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• heat-storage operating means (13) for deactivating the used-side fan (6f) when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby implementing heat storage;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed and whether the heat storage by the heat-storage operating means (13) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• used-side temperature sensing means (The) for sensing a refrigerant temperature Te of the used-side heat exchanger (6), wherein the completion determining means (14) receives a sensed temperature signal from the used-side temperature sensing means (The) and outputs a completion signal when the refrigerant temperature Te of the used-side heat exchanger (6) rises to or above a specified temperature.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• thermal-source-side temperature sensing means (Thc) for sensing a refrigerant temperature Tc of the thermal-source-side heat exchanger (3);
• used-side temperature sensing means (The) for sensing a refrigerant temperature Te of the used-side heat exchanger (6);
• timer means (TM) which starts when the defrosting requiring means (11) outputs a defrosting requiring signal;
• and
• the completion determining means (14) receives respective sensed temperature signal from the thermal-source-side temperature sensing means (Thc) and from the used-side temperature sensing means (The) and a time signal from the timer means (TM), and outputs a completion signal when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) at the present time drops to or below a specified temperature, when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) at the present time drops to or more than a specified difference from a reference refrigerant temperature Tcl of the thermal-source-side heat exchanger (3) at the time before the expansion mechanism (5) is fully closed, when the refrigerant temperature Te of the used-side heat exchanger (6) at the present time rises to or above a specified temperature, or when a set time passes.

In an air conditioner comprising a refrigerant circuit (9) in which a compressor (1), a thermal-source-side heat exchanger (3) having a thermal-source-side fan (3f), an expansion mechanism (5) freely adjustable in opening and a used-side heat exchanger (6) having a used-side fan (6f) are sequentially connected and which is operable in at least heating cycle operation, an operation control device for said air conditioner comprising:

• defrosting requiring means (11) for outputting a defrosting requiring signal to require defrosting operation;
• refrigerant recovering means (12) for fully closing the opening of the expansion mechanism (5) with the refrigerant circuit (9) in a heating cycle when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby recovering refrigerant;
• heat-storage operating means (13) for deactivating the used-side fan (6f) when the defrosting requiring means (11) outputs a defrosting requiring signal, thereby implementing heat storage;
• completion determining means (14) for determining whether the recovery of refrigerant by the refrigerant recovering means (12) is completed and whether the heat storage by the heat-storage operating means (13) is completed;
• defrosting executing means (15) for executing defrosting operation when the completion determining means (14) outputs a completion signal that the recovery of refrigerant is completed;
• and
• thermal-source-side temperature sensing means (Thc) for sensing a refrigerant temperature Tc of the thermal-source-side heat exchanger (3);
• used-side temperature sensing means (The) for sensing a refrigerant temperature Te of the used-side heat exchanger (6);
• timer means (TM) which starts when the defrosting requiring means (11) outputs a defrosting requiring signal;
• and
• the completion determining means (14) receives respective sensed temperature signal from the thermal-source-side temperature sensing means (Thc) and from the used-side temperature sensing means (The) and a time signal from the timer means (TM), and outputs a completion signal when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) at the present time drops to or below a specified temperature, when the refrigerant temperature Tc of the thermal-source-side heat exchanger (3) at the present time drops to or more than a specified difference from a reference refrigerant temperature Tcl of the thermal-source-side heat exchanger (3) at the time before the expansion mechanism (5) is fully closed, when the refrigerant temperature Te of the used-side heat exchanger (6) at the present time rises to or above a specified temperature, or when a set time passes.