Nec Corporation

Hitachi Industrial Equipment Systems Co., Ltd.

Hitachi-johnson Controls Air Conditioning, Inc.

Johnson Controls-hitachi Air Conditioning Technology (hong Kong) Limited

Tsutomu Nozaki

Hideharu Tanaka

Fumio Takeda

Yuuichi Yanagase

Wataru Uchida

Masayuki Kasahara

Kiyotaka Horikawa

Takehiro Matsuzaka

Kazuyuki Matsunaga

Takeshi Kouno

Ryo Kurono

Provided is, e.g., a compressor with a high reliability. A compressor () includes a hermetic container () sealed with lubricant oil, an electric motor () placed inside the hermetic container () and having a stator () and a rotor (), a crankshaft () configured to rotate integrally with the rotor (), a compression mechanism () configured to compress refrigerant in association with rotation of the crankshaft (), a discharge pipe (Pb) configured to guide the refrigerant compressed in the compression mechanism () to the outside of the hermetic container (), and a tubular oil ring () provided between the compression mechanism () and the electric motor (). A cutout (s) is, at a lower portion of the oil ring (), provided as a first insertion portion into which the discharge pipe (Pb) is inserted.

Compressor and air-conditioner

Provided is a scroll compressor capable of ensuring reliability of a release valve device. The scroll compressor is provided with: an orbiting scroll having an orbiting scroll wrap; a fixed roll having a fixed scroll wrap intermeshing with the orbiting scroll wrap; a release hole formed in the fixed scroll; a housing hole communicating with the release hole and having larger diameter than that of the release hole; a valve seat member which is housed in the housing hole and has a valve seat surface; a valve plate contacting with or separating from the valve seat surface by a pressure difference; a spring for pressing the valve plate against the valve seat surface; a stopper which is equipped with the spring and secures the valve seat member; and a retainer for securing the stopper.

Scroll compressor

In a water-supply line for performing water-supply to the rotors and the mechanical seal of a compressor, or in a condensed-water collection line for collecting condensed water of a dryer into the inlet port of the compressor, a water reservoir is provided at a position higher than the water-supply unit of the compressor. Moreover, there are provided a start-time water-supply line and a solenoid valve set up therein. Here, the start-time water-supply line establishes the connection between the lower portion of the water reservoir, and the inlet port of the compressor and the water-supply unit of the mechanical seal.

Water lubricated screw compressor

A broadcast communication system in which a terminal unit for sending electronic mail transmits electronic mail data containing text of electronic mail, transmission destination data, a first command indicative of a transmission condition and a second command indicating that broadcast distribution is to be conducted, a mail server, upon reception of electronic mail data containing a second command, transmits a title and an access code of electronic mail text to all of terminal units of transmission destinations indicated by transmission destination data and upon reception of electronic mail data not containing a second command, sends back electronic mail text corresponding to the access code, and a terminal unit for receiving electronic mail, at the time of reception of distribution of electronic mail text, transmits electronic mail data containing an access code to the mail server.

System for broadcasting electronic mails that separately stores and sends a portion of electronic mails with an access code for filtering and retrieving purpose

The present invention provides an apparatus of stuff synchronization frame control which can realize great improvement in the power of error resistance of the stuff synchronization control bit when there occur so many erroneous stuff synchronization control bits that cannot be repaired even by the majority process in a radio section. Radio-side and network-side clocks from the clock counters 11 and 12 are compared by the comparator 13, and the comparison result is inputted into the register 14. On an entry of a new stuff synchronization control bit into the register 14, the stuff synchronization control bit in the frame immediately before the entry is stored in the register 15. The multiplexer 16 multiplexes the stuff synchronization control bit together with transmission data for transmission. The separator 21 receives the data separated from the received data, in the received data buffer 22. When the result obtained by majority processing the stuff synchronization control bit in the frame in question has become unfixed, the comparator 23 switches the selector 25 to control the address counter 26 by means of the output from the comparator 24 which the stuff synchronization control bit in the frame immediately after the switching, has entered. The transmission timing to the network side and the reception timing from the radio side are absorbed by the elastic store memory 27.

Apparatus of stuff synchronization frame control

Growing community of inventors

Tokyo, Japan

Tsutomu Nozaki