A one-way direct sequence spread spectrum communications wide-area network is the data collection channel of an automatic meter reading system, and a paging network, or other suitable communication channel is the optional forward channel. The image can be a color image, with color represented using digital values B, e and f such that B=\u221a{square root over }, e=EB, f=FB, where DEF is a linear color coordinate system. The condensed refrigerant is passed through the energy recovery device to expand the refrigerant. Further, the sorption container is arranged beneath the base of the washing container in a substantially freely-suspended manner such that, for heat protection, the sorption container has a predefined minimum gap distance in relation to neighboring components andor neighboring parts of the base module. In an EEPROM 84 stored is the value of the input data of the DAC 4 which has been measured in advance and corresponds to the tuned voltage of when the tracking error is the minimum at the central value of the local oscillation frequency, and the MPU 81 reads the data from the EEPROM 84 and inputs it to the DAC 4. Moreover, both the upper cover and the bottom box of the accommodating body include a plurality of water-guiding grooves, such that the water droplets onto the front surface and the rear surface of the accommodating body would be ruled out via the water-guiding grooves.