摘要:
A facing surface (52) of a refrigerant jacket (40) includes: a contact portion (520) which contacts a device main body (200), a first recessed portion (521) which faces a first lead section (201) and secures an insulation distance to the first lead section (201) due to being positioned further away from a power device (20) than the contact portion (520), and a second recessed portion (522) which faces the second lead section (202) and secures an insulation distance to the second lead section (202) due to being positioned further away from the power device (20) than the contact portion (520).
摘要:
The unnecessary replacement of a motor—namely, when the motor has not failed— is prevented. A failure factor determination support apparatus (13) comprises an operating power supply unit (14) and a voltage detection unit (15). The operating power supply unit (14) generates an operating power supply and supplies such to a motor driver IC (52), which both controls the drive of a motor (51) and determines whether the motor (51) is in the faulty rotation state. The voltage detection unit (15) detects a voltage value ( Vcc ) of the operating power supply if the motor driver IC (52) has determined that the motor (51) is in the faulty rotation state.
摘要:
In a refrigeration apparatus, a main surface of a printed wiring board (90) has a heavy electric region (R1), which is a region in the lower part of the printed wiring board where a heavy electric component group is disposed, and a light electric region (R2), which is a region positioned above the heavy electric region, where a light electric component group is disposed. A refrigerant jacket (40) contacts a power device (20) which is disposed in the heavy electric region. A liquid pipe of the refrigerant pipe (10) includes a portion that extends upwards towards the refrigerant jacket, and a cooling portion (10A) contacts the refrigerant jacket.
摘要:
An object of the present invention to enhance reliability with smooth operation in the presence of a standby power reduction unsupporting model that cannot transition to a suspended state. An air conditioner (1) includes a selection mechanism (16) that prevents a current flow in a power supply wiring (1a) in an operation stop period and determines whether to adapt an outdoor unit (10) to a unit that is able to transition to a suspended state in which no electric power is supplied to the outdoor unit (10). The selection mechanism (16) is provided in the power supply wiring (1a), and includes a relay (K13R) that prevents a current flow in the power supply wiring (1a) in the operation stop period to cause the air conditioner to transition to the suspended state in which no electric power is supplied to the outdoor unit (10), an auxiliary circuit (16a) provided in parallel with the relay (K13R) and configured to always supply electric power to the outdoor control circuit (13), and an opening/closing unit (17) provided in the auxiliary circuit (16a) and configured to open and close the auxiliary circuit (16a). The opening/closing unit (17) is a connector.
摘要:
A preheater for a compressor that is capable of heating a lubricant oil efficiently with smaller power is provided. A preheater (50) for a compressor (15) includes: a capacitive oil surface sensor (46) that is provided at a compressor (15) used in a refrigerating cycle, and detects an oil surface of a lubricant oil A in the compressor (15); and a power supply unit (45) that applies high-frequency voltage to the oil surface sensor (46).
摘要:
A motor current calculation device (9) comprises a GND wire (94), a current detecting unit (95), a decision unit (96a), and a calculation unit (96b). A motor current (Im) that has been passed through a second fan motor (81) and a drive current (Id) that has been passed through a second motor driver (82) for driving the second fan motor (81) both flow through the GND wire (94). The current detecting unit (95) detects the sum of the motor current (Im) and the drive current (Id) flowing through the GND wire (94). The decision unit (96a) determines a detection result of the current detecting unit (95) when the second fan motor (81) is not rotating as the drive current (Id). The calculation unit (96b) calculates the motor current (Im) by subtracting the drive current (Id) determined by the decision unit (96a) from a detection result of the current detecting unit (95) when the second fan motor (81) is rotating.
摘要:
This invention provides a current detecting device with which an accurate motor current can be obtained and an air conditioning apparatus equipped therewith. This invention also provides a correction constant calculating system equipped with the current detecting device and a correction constant calculating method. A current detecting device (9) is equipped with a current leveling unit (93), a GND wire (94), and a current detecting unit (95). The current leveling unit (93) levels a drive current (Id) that is passed through a second motor driver (82) for driving a second fan motor (81). On the GND wire (94), a motor current (Im) that has been passed through the second fan motor (81) and the drive current (Id) that has been leveled by the current leveling unit (93) flow. The current detecting unit (95) detects the sum of the motor current (Im) and the drive current (Id) that has been leveled flowing on the GND wire (94).