摘要:
A controller (1) for controlling the temperature in a food compartment of a refrigerator switches on the compressor (6) of the refrigerator when the actual temperature exceeds a cut-in temperature threshold (Ton) and switches off the compressor (6) when the evaporator temperature falls below a cut-out temperature threshold (Toff). The controller (1) detects a thermal dispersion of the refrigerator for compensating the influence of the ambient temperature on the temperature inside the refrigerator. The cut-in temperature (Ton) and/or the cut-out temperature (Toff) are adjusted in accordance with a thermal dispersion ratio based on a ratio of a rate of fall of evaporator temperature when the compressor (6) is on, to a rate of rise of temperature when said compressor (6) is off.
摘要:
Upgraded firmware for a microcontroller is created and encrypted to construct a file (116) that can be distributed and installed by technicians in the field. The encryption includes character encryption (210) of the data as well as a second level of block encryption (216). Within the encrypted file (116), information about the firmware and the target microcontroller (104) is included. The distributed firmware file (116) is stored on a portable device, such as a PDA, that can communicate with the target microcontroller (104) to effect a firmware transfer from the PDA (112) to the microcontroller (104). The microcontroller (104) includes a programming routine that receives the encrypted data stream from the PDA and decrypts the data before storing the new firmware image. The programming routine also identifies when updating the firmware has left the firmware in an unusable condition and prevents operation of the microcontroller until the firmware is restored. Accordingly, the security of the firmware is maintained throughout the distribution and upgrade process and the integrity of the upgrade process is maintained as well.
摘要:
Method to produce devices to control levels and volumes for domestic appliances, said control devices comprising a level measurer, a programming and timing element and valve means (15), wherein a step is provided to measure a univocal value detected by the measurer (12) made during a step in its production cycle, a step of writing said value in a memory (14) of the programming and timing element (timer) (13), a step to define a correction coefficient (k) correlated to the geometry and characteristics of the domestic appliance on which the control device (10) is installed, and a step to define, by the timer (13) and while the machine is working, every level which can be obtained inside the drum or receptacle (11) using said univocal value measured by the measurer (12) and said correction coefficient (k).
摘要:
A refrigeration system control apparatus for use with an ice bank (10) for sequentially cycling a refrigerator compressor (16) on and off based on sensed conditions. The system includes a first temperatures probe (120) located a first distance from a refrigerator evaporator coil (14) and a second temperature probe (122) located a second, greater distance from the refrigerator evaporator coil (14). A programmable controller (130) monitors temperature outputs from the first and second temperature probes (120, 122) and turns on and off the refrigerator compressor (16) based upon a rate of change of the temperature difference between the sensed temperatures of the first and second probes (120, 122).
摘要:
Ein Abgasrückführventil (10) ist elektromagnetisch betätigbar und ist an einer Seite mit der Abgasrückführleitung (12) und an der anderen Seite mit der Saugseite (14) eines Motors verbunden. Das Ventil (10) weist einen Ventilstößel (20) und einen Ventilteller (18) auf, und in einem von dem Ventilteller (18) beabstandeten Bereich ist eine mit dem Ventilstößel (20) verbundene Wirkfläche (28) vorgesehen, die zwei Kammern (30, 32) voneinander abgrenzt. Zur Erreichung einer Druckkompensation ist die erste Kammer (30) mit der Saugleitung (14) verbunden, und/oder die zweite Kammer (32) steht mit der Abgasrückführleitung (12) in Verbindung.
摘要:
A pressure responsive control device having a pressure housing assembly (12) defining a pressure chamber (24), an actuable controller (14) fixed to the housing assembly and pressure transducer (16) hermetically closing the pressure chamber (24). The transducer (16) includes plural duplicate snap acting pressure responsive diaphragms (60a, 60b, 60c), a diaphragm control plate (62) hermetically bonded to the diaphragms and a support member (64) hermetically joined between the control plate (62) and the housing assembly (12). The diaphragms each are formed from thin sheets of spring metal and includes a central dome section (68) having a surface finish less than 6 microinches A.A. on both sides. The diaphragms are nested together so that confronting faces of the dished sections are engaged when the diaphragms flex.
摘要:
The present invention provides a method to statelessly compress an IPv6 header from forty octets to as small as or at a minimum of four octets by utilizing information contained in the lower network layers so that the original IPv6 header can be reconstituted as needed without state information maintained from and/or intermediate nodes. By compressing a typical forty octet IPv6 header into at a minimum four octets for transmission across a local area network, battery life for non-line powered local devices can be increased. When the package is to be sent outside of the local area network, the complete IPv6 header packet can be rebuilt prior to transmission.