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1. 发明专利

JPH09112441A POSITIVE DISPLACEMENT PUMP AND COMPRESSOR 失效
公开(公告)号：JPH09112441A
公开(公告)日：1997-05-02
申请号：JP27423695
申请日：1995-10-23
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： HAGITA NAOMI , HAYASE ISAO , TOJO KENJI , MIZUNO TAKAO , TOMITA YOSHIKATSU , MATSUNAGA MUTSUNORI
IPC分类号： F04C18/02 , F04C2/10 , F16N13/00
摘要： PROBLEM TO BE SOLVED: To provide a positive displacement pump that simplifies its structure and also improves the extent of sealability, thereby making it usable as a liquid pump even if a gaseous body exists on top of the liquid. SOLUTION: This pump is composed of installing a driving shaft 14 having an outer circumferential cylindrical surface 14a and a radial inner circumferential cylindrical surface 14b whose both ends are opened to the former 14a, and rotating around a center axis of the said outer circumferential cylindrical surface, a housing member 28 fitted in with this driving shaft 14, a piston member 26 having an outer circumferential surface 26d to be inserted into the inner circumferential cylindrical surface 14d of the driving shaft 14 and a sliding guide part 26a being orthogonal with the center axis of the outer circumferential surface, and a driven shaft 27 having a key part 27a being fitted in the sliding guide part 26a and the outer circumferential cylindrical surface. In addition, it is also provided with a bearing member supporting the outer circumferential cylindrical surface 14a of this driven shaft member 27 as being eccentric to the driving shaft 14 as a constituent element, through which volumetric capacity of an operating space surrounded by the driving shaft, the housing member and the piston member is varied to some extent by a reciprocating motion of the piston member, and thus a fluid is transferred.

2. 发明专利

DE3712755A1 未知
公开(公告)号：DE3712755A1
公开(公告)日：1988-02-04
申请号：DE3712755
申请日：1987-04-15
申请人： HITACHI LTD
发明人： TOMITA YOSHIKATSU , KIKUCHI KATSUAKI , HAZAKI EIICHI , ARATA TETSUYA , SHIIBAYASHI MASAO , SUEFUJI KAZUTAKA , SENSHU TAKAO , MURAYAMA AKIRA
IPC分类号： F04C18/02 , F01C21/04 , F04C29/02 , F01C1/04

3. 发明专利

DE3422389A1 未知
公开(公告)号：DE3422389A1
公开(公告)日：1984-12-20
申请号：DE3422389
申请日：1984-06-15
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , KOTANI SUMIHISA , TOMITA YOSHIKATSU , ARATA TETSUYA , SHIIBAYASHI MASAO , SUEFUJI KAZUTAKA
IPC分类号： F04C18/02 , F04C23/00 , F04C27/00 , F01C1/04
摘要： A scroll-type fluid machine having an orbiting scroll member and a stationary scroll member each having an end plate and a spiral wrap of at least two turns protruding upright from one of the sides of the end plates. The orbiting scroll member has a back pressure chamber formed on the back side thereof and communicating with the compression spaces of the fluid machine through pressure equalizing ports formed in the orbiting scroll member, so that the pressure of the fluid under compression is introduced to the back pressure chamber to produce an axial thrusting force for pressing the orbiting scroll member towards the stationary scroll member. The positions of the pressure equalizing ports in terms of the wrap angle lambda of the wraps are selected to meet the following condition: lambda d> lambda > lambda d-2 pi , where, lambda d represents the wrap angle of the wraps when the volume of the compression spaces is minimized. The equalizing ports are positioned at lambda and lambda +2 pi .

4. 发明专利

DE3142744A1 未知
公开(公告)号：DE3142744A1
公开(公告)日：1982-06-09
申请号：DE3142744
申请日：1981-10-28
申请人： HITACHI LTD
发明人： SUEFUJI KAZUTAKA , ARATA TETSUYA , TOMITA YOSHIKATSU , KOTANI SUMIHISA , UCHIKAWA NAOSHI , MURAYAMA AKIRA
IPC分类号： F04C18/02 , F04C23/00 , F04C28/06 , F04C28/16 , F25B1/04 , F25B13/00
摘要： A refrigerating system including a refrigeration circuit and a scroll type compressor provided with two volume control mechanisms to allow the system to selectively perform full load operation and unloaded operation. The scroll type compressor includes two scroll members of known construction meshing with each other to define compression chambers and a suction chamber and is combined with the refrigeration circuit having an outdoor heat exchanger, an expansion valve, an indoor heat exchanger and a four-way change-over valve to provide a heat pump type refrigerating system. The volume control mechanisms each include a pair of bypass apertures in the fixed scroll member communicating with a valve chamber having a valve member slidably mounted therein and normally biased to an open position by a spring. The bypass apertures, of which one communicates with the suction chamber and the other communicates with one of the compression chambers, and the valve chamber constitute a bypass passageway. A pressure introducing pipe opens in the valve chamber. Upward movement of the valve member brings the two bypass apertures in communication with each other through the valve chamber to enable the system to perform a volume control operation. In another application, four volume control mechanisms are located symmetrically and divided into two blocks through a flow passage switching device to assign two mechanisms to one block. By this arrangement, the system is able to perform volume control operation in three stages, or able to operate selectively at maximum load, intermediate load and minimum load.

5. 发明专利

MY127931A REFRIGERANT COMPRESSOR AND REFRIGERATING APPARATUS 未知
公开(公告)号：MY127931A
公开(公告)日：2006-12-29
申请号：MYPI9804174
申请日：1998-09-11
申请人： HITACHI LTD
发明人： UEDA HIDEYUKI , TOJO KENJI , MIZUNO TAKAO , TOMITA YOSHIKATSU
IPC分类号： F04C29/00 , F25B1/00 , C10M105/18 , C10M107/24 , C10M171/00 , C10N40/30 , F01C21/02 , F04B39/02 , F04C18/02 , F04C29/02 , F25B1/04 , F25B31/00
摘要： A REFRIGERATING APPARATUS OF THE INVENTION HAS A SCROLL COMPRESSOR HAVING A COMPRESSING SECTION SUCKING AND COMPRESSING A HYDROFLUOROCARBON-BASED REFRIGERANT, A CONDENSER (102) AND THE LIKE, IN WHICH A PLAIN BEARING SLIDABLY SUPPORTING A DRIVING SHAFT (5) DRIVING THE COMPRESSING SECTION OF THE SCROLL COMPRESSOR IS MADE OF A MATERIAL CONTAINING LEAD, AND AN ETHER OIL MISCIBLE WITH THE REFRIGERANT USED IN A REFRIGERANT CIRCUIT IS USED AS A LUBRICANT FOR LUBRICATING THE PLAIN BEARING.(FIG 1)

6. 发明专利

DE3341637A1 Fluid kinetic machine with spiral construction 未知
公开(公告)号：DE3341637A1
公开(公告)日：1984-06-14
申请号：DE3341637
申请日：1983-11-17
申请人： HITACHI LTD
发明人： SHIIBAYASHI MASAO , TOJO KENJI , TOMITA YOSHIKATSU , ARAI NOBUKATSU , IKEGAWA MASATO
IPC分类号： F04C18/02 , F01C1/02 , F01C21/04 , F04C23/00 , F04C18/04
摘要： The fluid kinetic machine with spiral construction has a static spiral element and an orbital spiral element, each of which is composed of a disc-shaped end plate and a spiral wall which projects perpendicularly from one side to the corresponding end plate, the assembly being carried out in such a way that the spiral walls interlock. The orbital spiral element carries out an orbital movement relative to the static spiral element in such a way that compression chambers formed between the spiral walls of the two spiral elements progressively move towards the centre, during which process they contract in volume and as a result compress gas, which has been drawn in through an intake opening, and discharge it into an outlet port. The machine has a back-pressure chamber which is formed in the end plate of the orbital spiral element. In this design, a lubricating oil circulation is formed which comprises a lubricating oil channel which leads from an oil reservoir to a back-pressure chamber via a constriction device, and which further comprises an oil channel, which takes lubricating oil from the back-pressure chamber to working chambers formed between the two spiral elements, and which does so via at least one fine continuous bore passing through the thickness of the end plate of the orbital spiral element on the inside of the spiral wall section within the range of 1/2, and specifically at magnitudes of the spiral wall coil number ratio, under which the ratio of the number of coils calculated from the outer ... Original abstract incomplete.

7. 发明专利

JPH08312542A SCROLL COMPRESSOR 失效
公开(公告)号：JPH08312542A
公开(公告)日：1996-11-26
申请号：JP11833695
申请日：1995-05-17
申请人： HITACHI LTD
发明人： MIZUNO TAKAO , MATSUNAGA MICHINORI , OKADA MITSUHIRO , TOJO KENJI , TOMITA YOSHIKATSU
IPC分类号： F04C29/00 , F01C21/02 , F04C18/02 , F04C23/00 , F04C29/02
摘要： PURPOSE: To mechanically prevent the partial contact of a bearing by making the internal peripheral surface of a bearing member be a slide bearing face, fitting the bearing member to a housing with a minute gap, and tilting the bearing member in a given range in this minute gap following the inclination of a crank shaft in operation. CONSTITUTION: A main bearing section has a man bearing member 31a, the internal peripheral surface of which is made to be a slide bearing face by providing a bearing bushing 31c, for example, inside a bearing holding member 31b, forming a cylindrical body, in the outside of which a projected line 31d is formed extending in the peripheral direction. In the bearing bushing 31c, a thrust bearing section 34 is uniformly formed. The main bearing member 31a can be assembled by being inserted into the housing 3e provided in a main frame 3 from an upper section and is fittedly held with a minute gap so as to be tilted in a given range, and the self-weight of the main bearing member 31a is supported on a receiving face 3f. In order to prevent the rotation of the main bearing member 31a, the housing 3e is provided with a detent 3g.

8. 发明专利

JPH06101913A AIR-CONDITIONER AND HOUSING BOX FOR CONTROLLER THEREOF 失效
公开(公告)号：JPH06101913A
公开(公告)日：1994-04-12
申请号：JP20878092
申请日：1992-08-05
申请人： HITACHI LTD
发明人： URATA KAZUMIKI , KOKUNI KENSAKU , TOMITA YOSHIKATSU , URASHIN MASAYUKI , MARUYAMA HIROSHI
IPC分类号： F24F11/02 , F25B1/00 , F25B49/02
摘要： PURPOSE:To provide a safe apparatus without causing a danger of explosion even when flammbable matter when a refrigerant leaks by structuring a driving circuit of a refrigerating cylce with a non-contact switching circuit. CONSTITUTION:Electric power is supplied to a microcomputer 1a on the side of an indoor machine through a transformer 2a and a rectifying circuit 3a. By the microcomputer 1a on the side of the indoor machine there are controlled various devices such as an indoor fan motor 5, a drain discharge device 6, an autolouvre motor 7, and an auxiliary motor 8. For driving control devices for the various devices there are used a plurality of small capacity triac 4 (a, g) as small capacity AC power semiconductor switching devices. For driving control devices for a compressor motor 10 there is used an inverter composed of a frequency conversion portion 15, etc., on which a diode module 3c, etc., are mounted. Further, a large capacity triac 9 is disposed on the primary side of each small capacity triac 4 and the diode module 3c. Hereby, even when flammable matter as the refrigerant leaks, a danger of explosion is prevented.

9. 发明专利

JPH0688638A AIR CONDITIONER 失效
公开(公告)号：JPH0688638A
公开(公告)日：1994-03-29
申请号：JP9256592
申请日：1992-04-13
申请人： HITACHI LTD
发明人： URASHIN MASAYUKI , URATA KAZUMIKI , TOMITA YOSHIKATSU , MATSUSHIMA HIROAKI
IPC分类号： F24F11/02
摘要： PURPOSE:To ensure comfortable air conditioning by opening one end of a duct for communication of a heat exchange chamber with a room to the upper por tion of the room while opening the other end of the duct to the lower portion of the room, and blowing out air from the duct opened to the upper portion upon cooling while from the duct opened to the lower portion of the room upon heating. CONSTITUTION:In the case of cooling operation, air in a room 21 flows into a heat exchange chamber 10 with the aid of a fan 8 from an opening 20c after passage through ducts 20, 20b, and the air cooled by a heat exchanger 5 flows into the room 21 from a duct 19b and openings 19c, 19d for cooling. In the case of heating operation, the air in the room 21 flows into a heat exchange chamber 9 with the aid of a fan 7 after passage through the openings 19c, 19d and ducts 19, 19a and the air heated by the heat exchanger 3 flows into the room 21 from a duct 20 and the opening 20c for heating. Thus, during cooling, cold air is blown out from the upper portion of the room, while during heating, hot air is blown off from the lower portion of the room.

10. 发明专利

JPH05332271A SCROLL TYPE MOTOR-DRIVEN COMPRESSOR 失效
公开(公告)号：JPH05332271A
公开(公告)日：1993-12-14
申请号：JP33214691
申请日：1991-12-16
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , TOMITA YOSHIKATSU
IPC分类号： F04C18/02 , F04C28/28 , F04C29/00 , F04C29/12
摘要： PURPOSE:To reduce incurring of a delivery loss, to prevent over compression, and to perform well-balanced stable operation by forming a delivery flow passage for providing an increased flow passage sectional area, and providing communication to an enlarged delivery port through the delivery flow passage. CONSTITUTION:First and second spaces are formed on the revolving scroll lap outer wall surface 100 side and the fixed scroll lap outer wall surface side by means of laps 10 and 13 and an end plate. The winding starting part of the lap 13 of a fixed scroll is more shortened than the winding starting point 33 of the lap 10 of a revolving scroll. Namely, a winding starting angle is set to a high value, and the tip part of the lap 13 is notched in the position of a point 109 to form a cut part. During a delivery stroke, compressed gas in the second space is caused to flow out to a delivery port 101 through a flow passage with a flow passage sectional area increased by the cut part. This constitution performs well-balanced stable operation.

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