JP2010261663A5 - - Google Patents

Claims (2)

A compressor for compressing at least a refrigerant, an outdoor heat exchanger, an outdoor refrigerant circuit decompressor are connected in this order, and an outdoor refrigerant circuit having a gas-side valve and liquid side valves on both ends of the outdoor refrigerant circuit a first temperature sensor for detect the refrigerant temperature on the discharge side of the compressor is installed in a substantially intermediate portion of the outdoor heat exchanger, and a fourth temperature sensor for detect the temperature of the refrigerant, the compression An outdoor unit having a sixth temperature sensor for detecting the temperature of the sealed container of the unit, and a fifth temperature sensor for detecting an air temperature around the outdoor heat exchanger;
A chamber refrigerant circuit in which at least the indoor heat exchanger are connected, and an indoor refrigerant circuit having a gas-side connecting portion at both ends and the liquid-side connecting portion of the indoor refrigerant circuit, substantially middle portion of the indoor heat exchanger is installed in the indoor unit having a second temperature sensor for detect the temperature of the refrigerant, and a third temperature sensor detecting the temperature of air sucked into the indoor unit,
A gas pipe connecting the gas side valve and the gas side connection part;
A liquid pipe connecting the liquid side valve and the liquid side connection part;
A control unit for controlling the operation of the air conditioner,
The controller is
If the phenomenon shown in at least one of the following (a) to (c) is detected for a certain period of time at the start of operation of the air conditioner, it is determined that the gas side valve or the liquid side valve has been forgotten to be opened. Then, the operation of the compressor is stopped.
(A) The temperature of the hermetic container of the compressor detected by the sixth temperature sensor is higher than the discharge temperature detected by the first temperature sensor by a predetermined value or more;
(B) The absolute value of the difference between the indoor air temperature detected by the third temperature sensor and the temperature of the substantially intermediate portion of the indoor heat exchanger detected by the second temperature sensor is a predetermined value or less. ;
(C) The absolute value of the difference between the outdoor air temperature detected by the fifth temperature sensor and the temperature of the substantially intermediate portion of the outdoor heat exchanger detected by the fourth temperature sensor is a predetermined value or less. . When the control unit continuously detects a phenomenon shown in at least one of (a) to (c) after a predetermined time has elapsed after starting the cooling operation or heating operation of the air conditioner for a certain period of time. The air conditioner according to claim 1, wherein the operation of the compressor is stopped when it is determined that the gas side valve or the liquid side valve is forgotten to be opened.