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1. 发明专利

JPS6462042A CLOCK SYNCHRONIZING CIRCUIT 失效
公开(公告)号：JPS6462042A
公开(公告)日：1989-03-08
申请号：JP21933287
申请日：1987-09-02
申请人： HITACHI LTD , HITACHI MICROCUMPUTER ENG
发明人： KINOSHITA MASASHI , MASUDA TAKASHI , SUKEGAWA FUMIO
IPC分类号： H04L7/00
摘要： PURPOSE:To supply a high speed synchronizing clock signal to a system independently of an input clock signal by using a characteristic of a PLL circuit capable of outputting even when no input clock signal exists as a 1st synchronizing part and using an LC circuit capable of high speed oscillation as a 2nd synchronizing part. CONSTITUTION:A pre-stage PLL circuit 1 as the 1st circuit section and a post- stage synchronizing circuit 2 as the 2nd circuit section are connected in series. The output of the pre-stage PLL circuit 1 is given to the post-stage synchronizing circuit 2 and branched and fed back to the pre-stage PLL circuit 1 via a frequency divider 3. Since the phase synchronizing feedback circuit such as the PLL circuit 1 or the like in the 1st synchronizing part is capable of being run itself, even when the input system is separated and the input clock signal is interrupted, the output clock signal is supplied to the system. Moreover, the element or circuit coping with the high speed is adopted for the 2nd synchronizing section, the synchronizing is attained even to a high speed clock signal. Thus, a high speed synchronizing clock signal is supplied to the system.

2. 发明专利

JPS63292743A OPTICAL LOOP NETWORK SYSTEM 失效
公开(公告)号：JPS63292743A
公开(公告)日：1988-11-30
申请号：JP12942287
申请日：1987-05-25
申请人： HITACHI LTD , HITACHI MICROCUMPUTER ENG
发明人： MASUDA TAKASHI , KINOSHITA MASASHI
IPC分类号： H04B10/27 , H04B10/079 , H04B10/275 , H04L12/42 , H04L12/437
摘要： PURPOSE:To attain proper processing depending on the error production state by providing a function monitoring the code rule error production state of an optical signal input on an optical reception circuit of each node in addition to a code rule error detection function. CONSTITUTION:A code rule error detection circuit 3 detecting the error state of a code rule of an optical signal and detecting the code rule error and a signal input state monitoring circuit 4 counting a code rule error per optical signal input of a prescribed number of times to monitor the production state of the code rule error are provided on the optical reception circuit 10 of each node. The level of the error state causing a code role error is recognized by an error detection signal from the signal input state monitoring circuit 4 to attain proper error processing corresponding to the state of error. Thus, the relay node having many errors is disconnected from the system and the reliability of the optical network system is improved.

3. 发明专利

JP2002244608A ADVERTISEMENT SYSTEM USING WINDOW GLASS 失效
公开(公告)号：JP2002244608A
公开(公告)日：2002-08-30
申请号：JP2001045944
申请日：2001-02-22
申请人： HITACHI LTD
发明人： SUGANO KATSUNORI , MASUDA TAKASHI , OKAZAKI MASASABURO , MIZUNO TAKASHI
IPC分类号： G06Q10/00 , G06Q30/02 , G06Q30/06 , G06Q50/00 , G09F19/00 , H04B5/02 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To provide exact advertisement meeting the needs of the viewers. SOLUTION: A server reads the portable telephone number from a portable telephone set when a customer who carries the portable telephone set just passes by a store to authenticate a member who has been registered, and analyzes information estimated that the customer would be interested in and displayes advertisement on window glass of the store.

4. 发明专利

JP2555083B2 失效
公开(公告)号：JP2555083B2
公开(公告)日：1996-11-20
申请号：JP16681987
申请日：1987-07-06
申请人： HITACHI LTD
发明人： TSUKAMOTO MORIAKI , TOKOI HIROMI , SUMIDA ISAO , INOE KOTARO , CHINEN MASANORI , MASUDA TAKASHI
IPC分类号： H02J7/34 , H02J3/32 , H02J15/00

5. 发明专利

JPH0460349A AIR CONDITIONER WITH MULTIPLE INDOOR UNIT 失效
公开(公告)号：JPH0460349A
公开(公告)日：1992-02-26
申请号：JP17000890
申请日：1990-06-29
申请人： HITACHI LTD
发明人： MATSUSHIMA HIROAKI , MASUDA TAKASHI
IPC分类号： F24F11/02 , F25B6/02 , F25B13/00
摘要： PURPOSE:To eliminate refrigerant noise when an operation is started and further to reduce a driving force for a two-way valve by a method wherein opening or closing valves are arranged at a liquid side connecting pipe and a gas side connecting pipe of an indoor unit and a control circuit for opening the gas side opening or closing valves in the stopped indoor unit after an expansion valve is temporarily closed during the operation is provided. CONSTITUTION:An outdoor unit 1 is comprised of a compressor 3, a four-way valve 4, an outdoor heat exchanger 5, an outdoor fan 6, an electrical expansion valve 7, gas side opening or closing valves 8A, 8B for opening or closing gas side connecting pipes 12A, 12B, liquid side opening or closing valves 9A, 9B for opening or closing the liquid side connection pipes 13A, 13B, and bypassing passages 16A, 16B for preventing an accumulation of refrigerant having capillary tubes 14A, 14B as well as check valves 15A, 15B installed therein. During a heating operation and when an operation of the indoor unit 1 is started, the expansion valve 7 is closed, resulting in that no flow of the refrigerant is found and a pressure in the indoor unit 1 is decreased down to the level of saturation pressure at surrounding temperature, and no refrigerant noise occurs even if the opening or closing valves are opened.

6. 发明专利

JPH049534A AIR CONDITIONER 失效
公开(公告)号：JPH049534A
公开(公告)日：1992-01-14
申请号：JP11002490
申请日：1990-04-27
申请人： HITACHI LTD
发明人： MASUDA TAKASHI , ITO MASAAKI
IPC分类号： F24F5/00
摘要： PURPOSE:To enable thermal radiation of a heat exchanger to be carried out without using any fan irrespective of a natural air flow by a method wherein a duct is mounted on an upper part of a condensing heat exchanger, an upper part of the condensing heat exchanger is expanded more than its lower part and a compressor is stored in the heat exchanger. CONSTITUTION:A compressor 1 is mounted in a part enclosed by a condensing heat exchanger 2 and the heat exchanger 2 is disposed in such a shape as one in which it is expanded from its lower part toward its upper part. Air in an outdoor unit is heated by a radiation of condensing latent heat for cooling of the heat exchanger 2 and a heat radiation of the compressor 1 so as to generate a buoyancy. Air around the heat exchanger 2 is fed inside the outdoor unit under a natural convection flow as indicated by a broken arrow due to a draft effect in a duct 10 and then the air is discharged out of the upper part of the duct. Accordingly, it is possible to promote heat radiation of the heat exchanger 2 against the surrounding air without using any fan. Since the heat exchanger 2 is disposed over the ground earth 12 by an installing table 11, it is also possible to perform heat radiation of the forced convection flow to the surrounding air with natural air.

7. 发明专利

JPH0359203A HEAT PUMP TYPE ROAD SURFACE SNOW MELTING DEVICE 失效
公开(公告)号：JPH0359203A
公开(公告)日：1991-03-14
申请号：JP19416589
申请日：1989-07-28
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： MASUDA TAKASHI , OYAMA YUKIO , YOSHINAGA SHINYA , YOSHIDA YORIO , SUZUKI YOSHIKATSU
IPC分类号： E01H5/10 , E01C11/26
摘要： PURPOSE:To decrease partial snow melting by constituting a heat pump type refrigerating cycle out of a compressor, an evaporator, a four-way valve, and a condenser, and laying a heat radiating panel composed of a refrigerant pipe of a condenser and a heat radiating plate on the road surface. CONSTITUTION:A heat radiating panel 1 is laid on the road surface 2. A snow sensor 5 detecting a snow coverage quantity on the road surface 2 is provided, and a drainage ditch 6 is provided on the end part of the road surface 2. A heat radiating panel 1 is constituted so that the refrigerant pipe 1c of a condenser held with a heat exchanger plate 1b is meanderingly arranged on the lower part of a flat plate shaped heat radiating plate 1a and the heat exchanger plate 1b is connected to the heat radiating plate 1a. Further, a heat pump device 3 is composed of a compressor 7, a four-way valve 8, an outdoor heat exchanger 9, a blower 15, and the refrigerant pipe 1c for the condenser, the refrigerant pipe 1c is meanderingly arranged, and a plurality of heat radiating panels 1 are connected in parallel to the device 3. Hereby, snow melting on the road surface with few partial melting can be performed.

8. 发明专利

JPH02122167A REFRIGERANT CIRCUIT FOR MULTIROOM AIR CONDITIONER 失效
公开(公告)号：JPH02122167A
公开(公告)日：1990-05-09
申请号：JP27296188
申请日：1988-10-31
申请人： HITACHI LTD
发明人： MASUDA TAKASHI , YAJIMA MASATO
IPC分类号： F25B13/00
摘要： PURPOSE:To make an accumulator smaller in size by providing solenoid valves in the midst of paths to room heat exchangers. CONSTITUTION:Room heat exchangers 7a, 7b and 7c are provided with solenoid valves 8a, 8b and 8c respectively in the midst of refrigerant pipes, and the solenoid valves 8a, 8b and 8c are opened during operation and closed during stoppage. The position of the solenoid valve 8a on the refrigerant path to the room heat exchanger 7a is determined so that the volume of an electric expansion valve 5a side of the room heat exchanger that is separated by the solenoid valve 8a equals to the volume of liquid refrigerant contained in the entire room heat exchanger 7a in heating operation, and the volume of the electric expansion valve 5a side of the room heat exchanger that is separated by the solenoid valve 8a equals to the volume of liquid refrigerant contained in the entire room heat exchanger 7a in cooling operation. As a result, the amount of refrigerant contained in a room unit out of operation equals to that contained in a room unit in operation. Therefore, even when a room unit is optionally stopped, an excess of refrigerant does not occur in the whole refrigerant piping, so that an accumulator can be made smaller in size.

9. 发明专利

JPS63231149A ADSORPTION TYPE REFRIGERATION CYCLE 失效
公开(公告)号：JPS63231149A
公开(公告)日：1988-09-27
申请号：JP6100887
申请日：1987-03-18
申请人： HITACHI LTD
发明人： MASUDA TAKASHI , OYAMA YUKIO , YANATORI MICHIO , KUNUGI TAKAFUMI
IPC分类号： F25B17/08

10. 发明专利

JPS6233263A HEAT PUMP TYPE AIR CONDITIONER 失效
公开(公告)号：JPS6233263A
公开(公告)日：1987-02-13
申请号：JP17234685
申请日：1985-08-07
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： MASUDA TAKASHI , OOYAMA YUKIO , IKEDA KAZUO , KURACHI YASUHIKO
IPC分类号： F25B13/00 , F25B47/02

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