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1. 发明专利

JPH06241486A AIR-CONDITIONING MACHINE EMPLOYING PTC HEATER AND CONTROL METHOD THEREOF 失效
公开(公告)号：JPH06241486A
公开(公告)日：1994-08-30
申请号：JP3175093
申请日：1993-02-22
申请人： HITACHI LTD
发明人： OKABE SHINYA , NAGAI MAKOTO , SASAKI TOSHIHARU , IZUSHI MINETOSHI , TAKENAKA HIROSHI , ITO MASAHIRO , KURODA SHIGEAKI
IPC分类号： F24F1/00
摘要： PURPOSE:To provide an air-conditioning machine employing a PTC heater, which is equipped with a structure, realizing the optimum arrangement for taking the maximum output of the PTC heater out, and permitting the cost down of the same machine by using components in common. CONSTITUTION:In a heat pump type air-conditioning machine 2, having a heat exchanger 3, a turbo fan 4, a water receiver 5, a heating capacity assisting PTC heater 1 and the like, the PTC heater 1 is installed at a position or the vicinity thereof, which is orthogonal to the tangential direction of the turbo fan 4, between the heat exchanger 3 and the turbo fan 4. The PTC heater 1 is installed at a place nearest as possible to the turbo fan 4 within a range wherein the speed of air from the turbo fan 4 is highest and noise is not generated. According to this method, the capacity of the PTC heater 1 can be taken out in the maximum limit. The fundamental structure of a kind of machine equipped with an auxiliary heater can be used commonly for the fundamental structure for another kind of machcine equipped with no auxiliary heater whereby the cost-down of the air-conditioning machine can be done.

2. 发明专利

JPH06193912A OUTDOOR UNIT OF AIR CONDITIONER USING ACTIVE TYPE NOISE SUPPRESSER 失效
公开(公告)号：JPH06193912A
公开(公告)日：1994-07-15
申请号：JP34252492
申请日：1992-12-22
申请人： HITACHI LTD
发明人： OKABE SHINYA , SHIMOIDE SHINICHI , KITAYAMA TORU , NAKAMURA MITSURU , AKUTSU HIROTO , MOROKUMA HIDETOSHI , KOIZUMI SHIGERU , HIDA TAKESHI
IPC分类号： F24F5/00 , G01H3/00 , G10K11/16 , G10K11/178
摘要： PURPOSE:To realize stable elimination of sound even under a rapid change in air attributed to moisture, temperature and the like by eliminating noises including those from a compressor from a hole through which a refrigerant cycle piping passes in an air conditioning outdoor unit actively. CONSTITUTION:In an air conditioner which contains an active type noise suppressor made up of a noise detection means 5, a controller to process a waveform signal obtained from the noise detection means based on an output signal of a noise suppressing effect detection means 7 and a sound generation means 4 to output a signal thereof as sound wave, at least one unit each of the sound generation means and the noise suppressing effect detection means are used to provide a noise supprissing effect detection means near a hole 6 through which a piping 10 passes connecting a cylinder body wrapping a compressor 2 or a machine chamber and a heat exchanger. It is made possible to eliminate noises actively as propagated through the piping hole and the sound generation means is set downward to prevent the infiltration of rainwater. Thus, a transmission function of sound is stored previously into a memory pertaining to the moisture and temperature inside the machine chamber or the like and is selected at any time thereby enabling the elimination of sound regardless of changes in weather conditions.

3. 发明专利

JPH0626744A METHOD OF AND APPARATUS FOR INSPECTING CONDITION OF CONNECTION BETWEEN OUTDOOR UNIT AND INDOOR UNIT AIR CONDITIONER 失效
公开(公告)号：JPH0626744A
公开(公告)日：1994-02-04
申请号：JP18101992
申请日：1992-07-08
申请人： HITACHI LTD
发明人： ITO MASAHIRO , IZUSHI MINETOSHI , TAKENAKA HIROSHI , OKABE SHINYA
IPC分类号： F25B49/02
摘要： PURPOSE:To enable ready and positive inspecting of connection of refrigerant piping and transmission line connecting a plurality of outdoor units to the same number of indoor units in a step prior to refrigerant cycle running for a trial run. CONSTITUTION:A plurality of outdoor units 2 provided in the same place are connected one by one to the same number of indoor units 1 such that refrigerant gas piping 4 and refrigerant liquid piping 5 of refrigerant piping are mounted in connecting piping provided for the respective outdoor units 2 and indoor units 1. Then vacuum formation or confirmation of air tightness within the refrigerant piping is effected. Changes of pressure in the refrigerant gas piping 4 and refrigerant liquid piping 5 are detected by a pressure sensor 3, and a control panel 12 compares values of both changes of pressure to each other to give a judgment of false connection when the both values of pressure changes do not coincide with each other.

4. 发明专利

JPH074389A TURBO FAN AND DEVICE MOUNTED TURBO FAN 失效
公开(公告)号：JPH074389A
公开(公告)日：1995-01-10
申请号：JP14622093
申请日：1993-06-17
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： WATANABE MASATOSHI , TAKADA YOSHIHIRO , SHIMOIDE SHINICHI , NAGAI MAKOTO , SATO RYOJI , OKAMOTO JOJI , SASAKI TOSHIHARU , HANADA MASAMICHI , TERADA HIROKIYO , OKABE SHINYA , YONEYAMA HIROYASU
IPC分类号： F04D29/28 , F04D29/30 , F04D29/66
摘要： PURPOSE:To uniform the speed distribution of air impeller output so as to reduce blast noise without cost increase by making the rate of local pressure rise at the impeller outlet large on the shroud side. CONSTITUTION:A turbo fan includes an impeller formed of an approximately disc like boss 3 provided with a motor driving shaft fitting hole, an annular hub 4 extended at the outer periphery of the boss 3, blades 5 planted on one face of the boss 3 spirally around the hole, and a shroud 6 opposed to the boss 3 with the blades placed in between. From a center axis to a specified distance R position, the cross section of the blade 5 on the plane vertical to the center axis is placed forward in the rotating direction as it approaches the center part of the impeller and shows spiral shape proceeding to the center axis almost from the outer peripheral part of the impeller, and a part close to the outer periphery of the impeller from the specified distance R position is bent so as to vertically approach the outer peripheral edge of the impeller. Accordingly, the outlet pressure of air flow rises locally so as to obtain the large air quantity.

5. 发明专利

JPH0972565A INDOOR MACHINE OF RADIATION TYPE AIR CONDITIONER 失效
公开(公告)号：JPH0972565A
公开(公告)日：1997-03-18
申请号：JP22926495
申请日：1995-09-06
申请人： HITACHI LTD
发明人： OKABE SHINYA , KONO KYOJI , KAMEI KOICHI , TAKAGI HIROSHI , YAMADA SHINICHIRO , FUKUSHIRO TAKESHI
IPC分类号： F24F1/00
摘要： PROBLEM TO BE SOLVED: To provide an indoor machine of a radiation type air conditioner in which the shapes and sizes of the indoor machine can arbitrarily be combined fitting to the size and wideness of a space where the air conditioner is disposed. SOLUTION: A ratio of a longitudinal size and a tranesverse size is set to be 1:1 or 2:1. There are provided a heat sink 2 disposed on the surface and a heat insulating member 5 formed into the same size of the heat sink 2 and disposed parallely at a predetermined interval. In an interval of a cube formed with the heat sink 2 and the heat insulation member 5 there are disposed a pressure reduction apparatus, an indoor heat exchanger 3 connected with the pressure reduction apparatus, a drain pan 4 for recovering condensed water produced in the heat exchanger 3, and an electric box 6 including a control board and a terminal block.

6. 发明专利

JPH07110143A AIR CONDITIONED ROOM OUTDOOR MACHINE INCLUDING ACTIVE SOUND DEADENING DEVICE 失效
公开(公告)号：JPH07110143A
公开(公告)日：1995-04-25
申请号：JP25690493
申请日：1993-10-14
申请人： HITACHI LTD
发明人： OKABE SHINYA , SHIMOIDE SHINICHI , CHIAKI TAKAO , FUKUSHIRO TAKESHI , IMAGAWA HIROMICHI
IPC分类号： G01H3/00 , F24F5/00 , G10K11/178
摘要： PURPOSE:To effectually remove sound three-dimensionally radiated from a blow-off outlet of a fan by providing sound deadening means facing the fan, and providing sound deadening means adjoining the sounding means in the same direction as that of the sounding means. CONSTITUTION:A heat exchanger 11 for cooling and condensing a compressed refrigerant is provided on an outdoor machine 1. A fan 6 driven by a motor 7 is provided in a casing formed with the heat exchanger 11. A blow-off outlet 8 is formed in a casing corresponding to the front surface of the fan 6. As an active sound deadening device a pickup 4 as noise detection means is mounted on the fan motor 7, and a speaker is as sound deadening means are mounted on a blow-off guard 9 respectively. The speaker 2 is opposed to the front surface of the fan 6 at the center of the blow-off outlet 8. In contrast, the microphone 3 is directed toward the fan adjoining the speaker 2.

7. 发明专利

JPH06330895A AIR CONDITIONER 失效
公开(公告)号：JPH06330895A
公开(公告)日：1994-11-29
申请号：JP12233593
申请日：1993-05-25
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： SHIMOIDE SHINICHI , WATANABE MASATOSHI , SASAKI TOSHIHARU , SATO RYOJI , OKABE SHINYA , OKAMOTO JOJI , YONEYAMA HIROYASU
IPC分类号： F04D29/28 , F04D29/70
摘要： PURPOSE:To make a bellmouth check any increase of a blowing noise as securing the ease of maintenance by forming it into a shape that made up a recess capable of storing a part of a fan motor driving circuit part of a radial impeller. CONSTITUTION:In this air conditioner, a suction grill 3 is installed at the center, and a dust collecting filter 13, a radial impeller 5 with plural pieces of blades 5a and a ringlike bellmouth 4 at a slip stream side of this suction grill 3, respectively. Especially this bellmouth 4 forms a recess 4a capable of storing a part of a driving circuit part 12, sucking indoor air from a central intake part. In addition, it is accelerated and pressurized by a fan motor 6 for driving the radial impeller 5 and installed at the outside of the radial impeller 5 at a specified interval with this radial impeller 5. In succession, air run past a single or plural heat exchangers 7 is blown indoors by a blow-out port 10. With this constitution, a passage space in and around the bellmouth is expanbable to some extent, and a reduction in fluid loss and control over the occurrence of flow turbulence are all made achievable.

8. 发明专利

JPH0515505A MEDICAL DIAGNOSING APPARATUS 失效
公开(公告)号：JPH0515505A
公开(公告)日：1993-01-26
申请号：JP15047791
申请日：1991-06-21
申请人： HITACHI LTD
发明人： SHIMOIDE SHINICHI , INOUE KO , SAHO NORIHIDE , OKABE SHINYA , OTSUKA MASAYUKI
IPC分类号： A61B5/055 , G01N33/38 , G01R33/28 , G01R33/385 , G01R33/54 , G10K11/178 , H04R1/40 , H04R3/00
摘要： PURPOSE:To enable the erasing of sounds without lowering diagnosing performance by arranging an error signal detection means to detect noises, a vibration detecting means to detect vibration of a cylinder, a phase/amplitude control means to generate a sound erasion signal and an enunciation means to generate a sound by the sound erasion signal. CONSTITUTION:A pickup 16 detects vibration acceleration of a bobbin 6 and an output thereof is transmitted to a vibration detecting circuit 18 through an output cable 17 as vibration signal. Moreover, after an amplification, a phase and amplitude are adjusted by a phase/amplitude control means 11. An enunciation means 14 for canceling noises generates a sound to erase noises based on a signal adjusted by the phase/amplitude control means 11. Microphones 13R and 13L are provided closer to ears of a patient 2 to collect a synthetic sound of a nose closer 20R and 20L to the ears of the patient 2 and a sound from the enunciation means 14. Then, the sound is transmitted to an error signal detection circuit 19 through output cables 12R and 12L as error signal.

9. 发明专利

JPH04369342A NOISE ELIMINATOR FOR AIR-CONDITIONER 失效
公开(公告)号：JPH04369342A
公开(公告)日：1992-12-22
申请号：JP14452491
申请日：1991-06-17
申请人： HITACHI LTD
发明人： SATO RYOJI , SHIMOIDE SHINICHI , OKABE SHINYA
IPC分类号： F24F11/02 , G01H3/00 , G10K11/16 , G10K11/178
摘要： PURPOSE:To provide a high-efficient passive control means through a simple control circuit and to reduce the generation of noise of a fan by a method wherein a sounding means is operated through conversion of a phase of a frequency determined by a detecting means and a produced sound is inputted to a receiving level regulating control means to effect passive control. CONSTITUTION:Since it is already known that at the noise source of an air- conditioner, noise emitted mainly from the suction side is loud, in a passive control method, two noise receiving means 9 located between a bell mouth 17 and a filter 2 concentrically and on a diagonal line and along the stream line of a flow and sounding means 8 placed in positions facing each other are provided. A sensor 10 for detecting the number of revolutions of an impeller and a sensor 4 for the source frequency of a motor are mounted as a detecting means. Rotation noise and electromagnetic noise from an impeller 3 are eliminated in a way that regulation is effected by a control means until the level thereof is reduced in the position of the noise receiving means 9 to a lower-most value by means of a sonic wave having an opposite to that of a noise source emitted from the sounding means 8 and the same amplitude as that thereof.

10. 发明专利

JPH10318634A VACUUM SUCTION IN REFRIGERATING CYCLE, AIR CONDITIONER AND VACUUM SUCTION DEVICE 失效
公开(公告)号：JPH10318634A
公开(公告)日：1998-12-04
申请号：JP12930597
申请日：1997-05-20
申请人： HITACHI LTD , HITACHI AIR CONDITIONING & REF
发明人： KOKUNI KENSAKU , TSUBOE HIROAKI , OKABE SHINYA , KIMURA TERUO , IWATA TADASHI
IPC分类号： F25B47/00
摘要： PROBLEM TO BE SOLVED: To obtain a vacuum suction method in a refrigerating cycle, an air conditioner and a vacuum suction device which can readily reduce moisture content in the refrigerating cycle and shorten time necessary for obtaining a given degree of vacuum without making the refrigerating cycle complicate. SOLUTION: In a vacuum suction method in which a vacuum suction in a refrigerating cycle which is formed by connecting a compressor 1, a heat- source-side heat exchanger 3 and service-side heat exchangers 11 and 12, an expansion valve 4 by means of connecting pipes 18, 19 is carried out by a vacuum pump 100, the connecting pipes 18, 19 are connected before filling a refrigerant in the refrigerating cycle and air in an atmospheric pressure condition in the refrigerating cycle is combined to one spot from several spots in the connecting pipes 18, 19 and then air is sucked by vacuum by way of a cold trap 101.

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