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1. 发明专利

JPH10205896A AIR CONDITIONING APPARATUS 失效
公开(公告)号：JPH10205896A
公开(公告)日：1998-08-04
申请号：JP1067297
申请日：1997-01-23
申请人： HITACHI LTD
发明人： KOKUNI KENSAKU , YAMADA SHINICHIROU , IZUSHI MINETOSHI , HORIUCHI NORIAKI , MATSUSHIMA HITOSHI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioning apparatus having a plurality of outdoor devices and more than one indoor devices connected by a common pipe in which a required amount of lubricant oil can always be circulated in each of the compressors irrespective of an operating state of each of the compressors. SOLUTION: An air conditioning apparatus having a plurality of outdoor devices 1a, 1b and more than one indoor devices 27a, 27b connected to each other in which there are provided a plurality of gas sensors 42a, 42b connected individually to oil separators 7a, 7b of each of the outdoor devices 1a, 1b; an oil tank 46 connected to each of the gas sensors 42a, 42b; and a plurality oil control valves 48a, 48b installed at each of pipes 51a, 51b having the oil tank 46 and accumulators 2a, 2b of each of the outdoor devices 1a, 1b connected individually, wherein there is also provided an oil control device 41 for use in controlling oil-control valves 48a, 48b in response to outputs of the gas sensors 42a, 42b.

2. 发明专利

JPH10110971A AIR CONDITIONER HAVING LIQUID CRYSTAL OPERATING SECTION 失效
公开(公告)号：JPH10110971A
公开(公告)日：1998-04-28
申请号：JP26699196
申请日：1996-10-08
申请人： HITACHI LTD
发明人： HATA YOSHIKI , IZUSHI MINETOSHI
IPC分类号： F24F11/02 , F24F13/20 , F24F1/00
摘要： PROBLEM TO BE SOLVED: To eliminate thermal insulating members which are used for prevention of a dew formation of a liquid crystal operating part, reduce a cost and prevent a visibility of the liquid crystal display from being reduced by a method wherein the operating part having a liquid crystal display is positioned at an upper part of an evaporator. SOLUTION: An operating part in a separate type air conditioner is integrally constituted with an indoor device. This device has such a constitution that an operating part 1 having a liquid crystal displaying device is positioned at an upstream side of an evaporator 2. With such an arrangement as above, even in the case of cooling operation, the rear surface of the operating part 1 is not exposed to cold air after being heat exchanged, so that there is no possibility that an occurrence of dew formation to be caused by a temperature difference between a front part and a rear surface of the operating part is generated. Thus, it is possible to perform a dew formation preventing design and save a test expenditure and a thermal insulating member expenditure. In addition, the central part of the device is bulged out and an operating part 1 having a liquid crystal display is arranged at an upper part of the bulged-out section, resulting in that the liquid crystal displaying part is directed upward, its face approaches orthogonally in respect to the sight lien of a person and his visibility can be improved.

3. 发明专利

JPH09120379A SYSTEM AND METHOD FOR SUPPORTING DEVELOPMENT 失效
公开(公告)号：JPH09120379A
公开(公告)日：1997-05-06
申请号：JP27589295
申请日：1995-10-24
申请人： HITACHI LTD
发明人： MAKITA HIROSHI , MATSUZAKI YOSHIE , SUZUKI HIDEAKI , KISHIKAWA ROBERUTO , KITAZAWA HIROSHI , IZUSHI MINETOSHI
IPC分类号： G06F13/00 , G06Q10/00 , G06Q10/06 , G06Q50/00 , H04L12/54 , H04L12/58
摘要： PROBLEM TO BE SOLVED: To automatically extract information, needed to solve a problem written in an electronic mail, from stored information and display it by selecting the electronic mail. SOLUTION: When the input of a test data display indication is received, test data on a measurement item predetermined corresponding to the problem contents that a selected problem communication mail includes are extracted from the test data group that the data identifier included in the mail identifier of the selected problem communication mail and then displayed. Further, a display of instance data is requested, and a problem communication mail and a problem countermeasure mail including the problem contents of the selected communication mail are extracted from stored problem communication mails and problem countermeasure mails and the displayed.

4. 发明专利

JPH06317295A AXIAL FAN 失效
公开(公告)号：JPH06317295A
公开(公告)日：1994-11-15
申请号：JP10839993
申请日：1993-05-10
申请人： HITACHI LTD
发明人： SATO RYOJI , OKAMOTO JOJI , KURODA SHIGEAKI , NAGAI MAKOTO , YONEYAMA HIROYASU , SAKUMA KOJI , IZUSHI MINETOSHI , SHIMOIDE SHINICHI , WATANABE MASATOSHI
IPC分类号： F04D29/32 , F04D29/66
摘要： PURPOSE:To set a lift coefficient at the optimal value by setting the whole blade area of blades so that the whole blade area in the number where the number of sample blades is reduced more than the reference number can be put in the specific relationship to the whole blade area of the reference number in a blade and a boss having the same diameter. CONSTITUTION:In a blade and a boss having the same diameter, the whole blade area A2 of blades, that is, the number of blades is set so that the whole blade area A2 in the number N2 where the number of sample blades is reduced more than the reference number N1 becomes [A2

5. 发明专利

JPH06294551A AIRCONDITIONING APPARATUS 失效
公开(公告)号：JPH06294551A
公开(公告)日：1994-10-21
申请号：JP7959893
申请日：1993-04-06
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , IZUSHI MINETOSHI , NAGAI MAKOTO , ITO MASAHIRO , ODA MASAHIRO , YOSHIDA SATORU , NAKAYAMA SUSUMU
IPC分类号： F24F11/02 , F25B1/00 , F25B13/00
摘要： PURPOSE:To achieve the optimization of the degree of superheating of a refrigerating cycle in the refrigerating cycle incorporating an electric expansion valve as decompressor of a room machine. CONSTITUTION:A outdoor unit 1 is provided having a compressor 2, a outdoor heat exchanger 4 and an outdoor decompressor 21 and a room unit 8 having an electric expansion valve 10 and a room heat exchanger 9. A controller is provided to control the electric expansion valve 10. In the cooling operation, the opening of the electric expansion valve 10 is computed or controlled with the controller so that it varies by steps according to the temperature of a high temperature/high pressure gas to be discharged from a compressor 2 to optimize the degree of superheating of a refrigerant at an outlet of the room heat exchanger 9 and a liquid refrigerant condensed and liquefied with the outdoor heat exchanger 4 is decompressed with an outdoor decompressor 21 and the electronic expansion valve 10 having the opening decided. This enables the simplification of a control system of the electronic expansion valve thereby shortening a development term of the control system while enabling the stabilization of a refrigerating cycle quickly.

6. 发明专利

JPH06137690A AIR CONDITIONER 失效
公开(公告)号：JPH06137690A
公开(公告)日：1994-05-20
申请号：JP28788092
申请日：1992-10-26
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： TAKENAKA HIROSHI , IZUSHI MINETOSHI , NAGAI MAKOTO , SASAKI TOSHIHARU , KOBAYASHI ATSUYASU , OKABE SHINYA , ITO MASAHIRO
IPC分类号： F25B1/00
摘要： PURPOSE:To provide an air conditioner in which a liquid tank can be eliminated, a total amount of refrigerant can be reduced and a temperature and a pressure within a freezing cycle can be stabilized. CONSTITUTION:In an air conditioner in which an outdoor device 1 having a compressor 2, a four-way valve 3, an outdoor heat exchanger 4, an outdoor pressure reducing device and an accumulator 5, and an indoor device 11 having an indoor heat exchanger 9 and an indoor pressure reducing device therein are connected in a closed loop through a gas pipe and a liquid pipe, at least one of the outdoor pressure reducing device and the indoor pressure reducing device is applied as an electronic expansion valve and the electronic expansion valve is connected to an expansion valve control device 12 in which a degree of opening of the electronic expansion valve is controlled in response to a temperature of the discharged gas of the compressor 2 detected by a thermistor 13.

7. 发明专利

JPH06123442A CEILING CASSETTE TYPE AIR CONDITIONER 失效
公开(公告)号：JPH06123442A
公开(公告)日：1994-05-06
申请号：JP27263892
申请日：1992-10-12
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： ITO MASAHIRO , IZUSHI MINETOSHI , SASAKI TOSHIHARU , TAKENAKA HIROSHI , KOBAYASHI ATSUYASU , NAGAI MAKOTO
IPC分类号： F16M13/02 , F24F13/32 , F24F1/00
摘要： PURPOSE:To reduce a working burden of a worker for installing an indoor device of an air conditioner to be hung in a room, make a convenience in working operation and safety in operation by a method wherein the indoor device of the air conditioner is provided with some temporary fixing fittings at its main body. CONSTITUTION:In the case that an air conditioner is to be hung, supporting bolts 6 are not directly inserted into recessed holes 9 for the supporting bolts in a main body fixing plate 2, but a temporary fixing fitting 4 arranged at the main body of the air conditioner is inserted in advance into a longitudinal temporary fixing hole 5 of a main body fixing plate, and the main body of the air conditioner is displaced to align the supporting bolts 6 with their normal positions and then the bolts are fastened with nuts. In this case, it is not necessary for the worker to support the air conditioner with both hands and one hand of the worker can be freely moved or used, thereby it becomes possible to simplify the fastening operation of the main body side four supporting bolts to the main body fixing plate with nuts. In this way, it is possible to reduce a burden of a worker at a high location where the worker hardly operates such as a tri-pod foot work and the like.

8. 发明专利

JPH06122496A PACKING MATERIAL FOR AIR CONDITIONER 失效
公开(公告)号：JPH06122496A
公开(公告)日：1994-05-06
申请号：JP27263792
申请日：1992-10-12
申请人： HITACHI LTD
发明人： SASAKI TOSHIHARU , TAKENAKA HIROSHI , IZUSHI MINETOSHI
IPC分类号： B65D85/68 , F24F1/00
摘要： PURPOSE:To decrease the two packing materials conventionally used between each air conditioner to one when the air conditioners are stacked in order to contrive energy conservation by a method wherein each individual packing material is provided with a recess part in each of the upper and lower surfaces conforming with the lower and upper parts of the air conditioner, respectively. CONSTITUTION:A packing material 1 for use in packing an air conditioner 2 is provided with a recess part 3a at its upper part for conforming with the lower part of the air conditioner 2 and a recess part 3b at the lower part thereof for conforming with the upper part of the air conditioner 2. When the air conditioners 2 are stacked in a plurality of tiers, the lower part of the air conditioner 2 is fitted into an upper recess part 1a of the lowest packing material 1, a lower recess part 1b of another packing material is fitted over the upper part of the air conditioner 2 and the lower part of another air conditioner 2 is fitted into an upper recess part 1a thereof. By laying the air conditioners, one upon another, in a repeated manner, the air conditioners can be stacked in several tiers and in this way the two packing materials 1 conventionally used between each air conditioner 2 can be decreased to one, thereby realizing resource conservation.

9. 发明专利

JPH0467045B2 失效
公开(公告)号：JPH0467045B2
公开(公告)日：1992-10-27
申请号：JP22973785
申请日：1985-10-15
申请人： HITACHI LTD
发明人： MATSUO YOSHINORI , KAWAIKE KAZUHIKO , UCHIKAWA NAOSHI , NOZAWA SHIGEKAZU , IZUSHI MINETOSHI
IPC分类号： F16C17/04

10. 发明专利

JPH03279699A DELTA WING PROPELLER FAN 失效
公开(公告)号：JPH03279699A
公开(公告)日：1991-12-10
申请号：JP7693090
申请日：1990-03-28
申请人： HITACHI LTD
发明人： IZUSHI MINETOSHI , AOYAMA MITSUGI , NISHIDA SHUICHI
IPC分类号： F04D29/38
摘要： PURPOSE:To reduce the area of spider on the opposite side of a blade tip and reduce noise in a rivet connection delta wing propeller fan for a heat exchanger of air in an air conditioner by providing a second rivet on the blade tip side of a straight line connecting a first rivet to the center of rotation. CONSTITUTION:The length (l) of a blade is formed longer than the radius (r) of outer circumference for reducing noise, and the distance between a first rivet 3 and the center of rotation is instituted to be over 90% of the distance between the blade tip 5 and the first rivet 3 for reducing stress on a rivet connection part. A second rivet 4 is positioned on the blade tip 5 side of a straight line connecting the first rivet 3 to the center of rotation. The load transmitting point from a blade 1 to a spider 2 is on the middle point between the first rivet 3 and the second rivet 4, and hence stress on the root part of the spider is mitigated. On the opposite side against the blade tip of the center line 7 of the root of spider, the area of spider is reduced for reducing centrifugal force, and they are connected together with two rivets. On the blade tip side, they are connected with three rivets containing rivets 3, 4. Hereby, stress is reduced and the blade length is enlarged to reduce noise.

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