Abstract: An heat pump drying machine has a normal dry mode (e.g., compression ratio is equal to or greater than 3) for operating a compressor at a predetermined dry operation frequency and an energy saving dry mode (e.g., compression ratio is equal to or greater than 2.3 and is less than 3) for operating the compressor at an energy saving operation frequency that is lower than the dry operation frequency. A control device is provided to control an operation frequency of the compressor 5so that the two dry operation modes are switched to each other. The control device can execute the control for increasing the operation frequency of the compressor to the dry operation frequency during the operation of the energy saving dry mode.

Abstract: An heat pump drying machine has a normal dry mode (e.g., compression ratio is equal to or greater than 3) for operating a compressor at a predetermined dry operation frequency and an energy saving dry mode (e.g., compression ratio is equal to or greater than 2.3 and is less than 3) for operating the compressor at an energy saving operation frequency that is lower than the dry operation frequency. A control device is provided to control an operation frequency of the compressor 5 so that the two dry operation modes are switched to each other. The control device can execute the control for increasing the operation frequency of the compressor to the dry operation frequency during the operation of the energy saving dry mode.

Abstract: A temperature recorder capable of storing, in time sequence, measured temperatures and measured times as temperature records in a memory incorporated therein, wherein, the temperature recorder is installed in a power line for temperature recording and, when the power line supplies a power in a normal temperature range, wirelessly transmits the temperature record to a monitor at a frequency of once every half day and, when an abnormal heating is detected from the power line, wirelessly transmits the temperature record as a temperature alarm record.

Abstract: A temperature monitor includes a temperature sensor, a transmitter, and a controller. The temperature sensor generates a temperature signal based upon a detected temperature and the controller controls the temperature sensor to generate the temperature signal and controls the transmitter to transmit the temperature signal along with a time at a first predetermined interval.

Abstract: A temperature recorder capable of storing, in time sequence, measured temperatures and measured times as temperature records in a memory incorporated therein, wherein, the temperature recorder is installed in a power line for temperature recording and, when the power line supplies a power in a normal temperature range, wirelessly transmits the temperature record to a monitor at a frequency of once every half day and, when an abnormal heating is detected from the power line, wirelessly transmits the temperature record as a temperature alarm record.

Abstract: A temperature monitor for electro-mechanical part, wherein, when the temperature of a cable clamp (7) installed on a transmission line (3A) as an electro-mechanical part is increased to a high temperature beyond an allowable temperature range, a temperature history recording part (40) stores temperatures and temperature measurement times as temperature warning records in a temperature warning memory (412) of a memory (407) and outputs transmission request signals for the temperature warning records to a main control part (80), and the main control part (80) transmits the temperature warning records to a receiving slave station (90) by operating a radio communication part (60) based on the transmission request signals.

Abstract: The refrigeration apparatus according to the invention has a main refrigeration line comprising a compressor, a condenser which are installed outdoor, and a decompression device, an evaporator and a refrigerant flow rate control valve which are installed indoor, all connected in a loop. The main refrigerant line is provided with an auxiliary refrigerant line that connects the input side of the decompression device in the main refrigerant line with the inlet side of the compressor via a bypass valve. The lowering in the suction pressure of the compressor is detected if it happens, and the pressure is restored by opening the bypass valve by throttling the refrigerant flow rate control valve, so that the compressor may be kept on running.