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1. 发明专利

JPH08312631A FASTENING CONSTRUCTION OF SHAFT 失效
公开(公告)号：JPH08312631A
公开(公告)日：1996-11-26
申请号：JP11949995
申请日：1995-05-18
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： DOBASHI KAZUHIRO , YAMADA SHINICHIRO , NAKAMURA KENICHI , MAEDA KENSAKU , IMAGAWA MASAHARU , IWASHINA YOSHINORI , NAGAHASHI KATSUAKI
IPC分类号： F16C3/02
摘要： PURPOSE: To facilitate alignment at fastening a shaft by cutting down over two positions on the shaft side at a shaft fastening part into the same form, setting optional one among them to be a drive transmitting plane, and constructing the other cut down parts not to contact with a part to which driving force is transmitted. CONSTITUTION: For fastening an impeller 1 to a driving shaft 3, optional one plane among planes 4a, 4b, 4c is set as a driving force transmitting plane, and positioned against a plane 2b to which driving force is transmitted. Any one of the planes 4a, 4b, 4c can be used as the plane to which driving force is transmitted, and hence alignment at fastening can be easily executed. Further, the fitting directions are three directions of 4a, 4b, 4c, and hence workability is improved. When the impeller 1 is fastened to the driving shaft 3 setting the plane 4a as the driving force transmitting plane, the planes 4b, 4c are not contacted with the impeller 1. Hereby, vibration and noise of an electric motor transmitted from the driving shaft 3 to the impeller 1 can be restrained.

2. 发明专利

JPH07145962A AIR CONDITIONER, OPERATING METHOD THEREFOR AND INSTALLING METHOD THEREFOR 失效
公开(公告)号：JPH07145962A
公开(公告)日：1995-06-06
申请号：JP29193593
申请日：1993-11-22
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAGAWA MASAHARU , YAMADA SHINICHIRO , YAGI KOSAKU , NAKAMURA KENICHI , TOGUSA KENJI
IPC分类号： F24F5/00
摘要： PURPOSE:To diversity stable safe transporting, installing operations, resources conservation and a piping and wiring installation state. CONSTITUTION:A plurality of sets of through holes 4 for passing to transport a fork 2 of a transporting fork lift truck are provided at a lower part of an air conditioner body 1, and passed from the front surface to the a rear surface and from one side to the other side. When an air conditioner is transported by the truck, the holes 4 are utilized thereby to eliminate a conventional transporting pallet. The holes 4 are utilized to prevent positional deviations of the form 2 of the truck and a transporting suspending rope at the time of transporting and to enhance safety of stable safe transporting and installing operation. Further, a tube and wires are laid around via the holes 4 thereby to omit a conventional drawing port of the tube and the wires. The roundabout direction of the tube and the wires can be distinctly used according to front, back or side surface, etc., in response to a requirement for an installing place and state, thereby improving serviceability of an installing operation.

3. 发明专利

JPH06185816A REFRIGERATING CYCLE 失效
公开(公告)号：JPH06185816A
公开(公告)日：1994-07-08
申请号：JP33432492
申请日：1992-12-15
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： YAGI KOSAKU , TOGUSA KENJI , YAMADA SHINICHIRO , UESUGI HIDESHI , NAGAI HIDEYUKI , NAKAMURA KENICHI
IPC分类号： F25B1/00 , F25B43/00
摘要： PURPOSE:To provide a refrigerating cycle in which an accumulator can be standardized without necessity of using a large-sized accumulator even when number of compressors is increased to increase a capacity of an entire compressor. CONSTITUTION:A refrigerating cycle comprises a plurality of compressors 1, 2, a condenser 3, a pressure reducing unit 4, an evaporator 5 and accumulators connected via a tube in a closed loop state, wherein the accumulators 9, 10 are mounted by one by one at the plurality of the compressors 1, 2.

4. 发明专利

JPH09229496A AIR CONDITIONER 失效
公开(公告)号：JPH09229496A
公开(公告)日：1997-09-05
申请号：JP3600196
申请日：1996-02-23
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAGAWA MASAHARU , HORIUCHI NORIAKI , NAKAMURA KENICHI , KOKUNI KENSAKU
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To secure coefficient of performance and high heating capacity in heating operation even if outdoor air temperature is low by providing a fluid injection line for injecting fluid refrigerant into a compressor between a subcooler at a heat source side and a pressure reducing device. SOLUTION: A compressor 1B enabling injection of fluid into a compressing system section, an application side heat exchanger 2, a heat source side subcooler 3, a pressure reducing device 4, a heat source side heat exchanger 5, a flow control valve 6 and fluid injecting lines 7B, 7C are provided. The fluid injection circuit is composed of the flow control valve 6 and the fluid injecting lines 7B, 7C. When heating operation is implemented, stable fluid refrigerant is supplied to the compressing system section of the compressor 1B through the fluid injecting circuit to keep temperature of winding of a driving motor for the compressor 1B and temperature of discharged refrigerant appropriate. As a result, the compressor 1B can be utilized at a high pressure ratio so that coefficient of performance and capacity for heating are assured even when outdoor temperature is low.

5. 发明专利

JPH09229494A AIR CONDITIONER 失效
公开(公告)号：JPH09229494A
公开(公告)日：1997-09-05
申请号：JP3600296
申请日：1996-02-23
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： NAKAMURA KENICHI , HORIUCHI NORIAKI , IMAGAWA MASAHARU , TOGUSA KENJI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To prevent performance of a heat pump from being deteriorated when outdoor temperature is low, by controlling an expansion valve in such a manner as to keep an inlet of a compressor at a target degree of superheat in order to effectively use a fluid injection circuit. SOLUTION: Firstly, operation of an air conditioner is started (S100). Then, compressor inlet pressure Ps and compressor inlet refrigerant temperature Ts are detected (S101) and refrigerant saturation temperature Tc at the compressor inlet pressure Ps is obtained (S102). Difference Δt between the compressor inlet refrigerant temperature Ts and the refrigerant saturation temperature Tc is calculated (S103) and Δt is compared with the target degree of superheat TsSH (S104). If the target degree of superheat TsSH is greater than Δt, a judgment that refrigerant flow is excessive is made to reduce travel of an expansion valve (S105). If the target degree of superheat is equal to Δt, a judgment that the refrigerant flow is appropriate is made so that no operation is made to change the travel of the expansion valve (S106). If the target temperature TsSH is smaller than Δt, a judgment that the refrigerant flow is insufficient is made to increase the travel of the expansion valve (S107).

6. 发明专利

JPH08121388A AIR-CONDITIONER 失效
公开(公告)号：JPH08121388A
公开(公告)日：1996-05-14
申请号：JP25497694
申请日：1994-10-20
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IWASHINA YOSHINORI , MAEDA KENSAKU , IMAGAWA MASAHARU , NAKAMURA KENICHI , YAMADA SHINICHIRO , TOGUSA KENJI
IPC分类号： F04D27/00 , F04D29/36
摘要： PURPOSE: To improve blast efficiency by changing the angle of the blade of a fan by means of a signal from a control device and performing the change of an airflow. CONSTITUTION: Blades of which the fan 7 of the blower of an outdoor unit consists are four blades of 8a, 8b, 8c, and 8d in a number and the angle of each of the blades is changeable in a range of 0-90 deg.. When 20-40% airflow is desired to output, an inclination of the blade 8a of which a motor and the fan 7 consist is changed. When 40-60% airflow is desired to output, an inclination of the blades 8a and 8b of which the motor and the fan 7 consist is changed. When 60-80% air flow is desired to output, an inclination of the blades 8a, 8b, and 8c of which the motor and the fan 7 consist is changed. When 90-100% airflow is desired to output, an inclination of all the blades 8a, 8b, 8c, and 8d of which the motor and the fan 7 consist is changed. Thus, an airflow optimum to a freezing cycle is obtained and when a load exerted on the fan is different, the blade is changed to a position where blast efficiency is excellent and reduction of the generation of noise and saving of energy are realized.

7. 发明专利

JPH06147659A DEVICE FOR KEEPING TEMPERATURE OF COMPRESSOR 失效
公开(公告)号：JPH06147659A
公开(公告)日：1994-05-27
申请号：JP29293592
申请日：1992-10-30
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： NAKAMURA KENICHI , TOGUSA KENJI , YAMADA SHINICHIRO , UESUGI HIDESHI , YAGI KOSAKU , NAGAI HIDEYUKI
IPC分类号： F25B1/00
摘要： PURPOSE:To provide a device for keeping the temperature of a compressor having means capable of heating even from the inside of the compressor and keeping the temperature of the compressor without mounting an electrical heater within the compressor. CONSTITUTION:Coils 1u and 1v of a motor 1 for a compressor mounted within a closed type compressor are connected in series with an electrical heater 4 through an auxiliary relay 3. A solenoid contact device 2 for motor driving and the auxiliary relay 3 are turned on or off and the coils 1u and 1v for the compressor motor 1 are used as a heating member. Due to the fact that the coil for the compressor motor is used as the heater, the compressor can also be heated from within the compressor and then an efficient compressor temperature keeping device can be attained.

8. 发明专利

JPH08313010A AIR CONDITIONER 失效
公开(公告)号：JPH08313010A
公开(公告)日：1996-11-29
申请号：JP11949895
申请日：1995-05-18
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MAEDA KENSAKU , YAMADA SHINICHIRO , IMAGAWA MASAHARU , NAKAMURA KENICHI
IPC分类号： F24F5/00
摘要： PURPOSE: To simplify the structure of an outdoor unit and to eliminate stagnancy heat in a machine chamber wherein a compressor and a pressure reducing device are held, by a method wherein an electrical component protecting cover of the outdoor unit is made to be of a rotary type and to have a size large enough to close up an opening of the machine chamber. CONSTITUTION: An outdoor unit for an air conditioner which is constructed of a compressor 1, a nonuse-side heat exchanger 2, a pressure reducing device 3, a blower 4, an electrical component box 5, an electrical component protecting cover 6 and an outer plate cover 7 can prevent excessive outdoor air from penetrating into the unit, by making the electrical component protecting cover 6 rotate to close up an opening of a machine chamber when inspection or checkup of a state of operation is needed, in a state wherein the outer plate cover 7 is removed. By removing a partition plate of the machine chamber provided so far between the side of the compressor 1 and the pressure reducing device 3 and the side of the blower 4 and the nonuse-side heat exchanger, in this way, a structure is simplified and stagnancy heat on the side of the compressor 1 and the pressure reducing device 3 can be eliminated.

9. 发明专利

JPH0814670A METHOD OF PREVENTING LIQUID FLOWING-BACK IN AIR CONDITIONER AND AIR CONDITIONER 失效
公开(公告)号：JPH0814670A
公开(公告)日：1996-01-19
申请号：JP14746194
申请日：1994-06-29
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAGAWA MASAHARU , YAMADA SHINICHIRO , NAKAMURA KENICHI , MAEDA KENSAKU , IWASHINA YOSHINORI , TOGUSA KENJI
IPC分类号： F25B1/00 , F25B13/00 , F25B40/06
摘要： PURPOSE:To enable liquid flowing-back into a compressor to be positively prevented without requiring any special facility such as a gasified refrigerant regenerating tank and without being influenced by a temperature of surrounding atmosphere. CONSTITUTION:Heat generated and discharged by a compressor 1 is exchanged with refrigerant sucked into the compressor 1 through a suction pipe 3 within a space enclosed by a cylindrical cover 2 and then liquid component within the refrigerant is gasified.

10. 发明专利

JPH0828907A AIR CONDITIONER 失效
公开(公告)号：JPH0828907A
公开(公告)日：1996-02-02
申请号：JP15836394
申请日：1994-07-11
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： ODA MASAHIRO , YAMADA SHINICHIRO , NAKAMURA KENICHI , IMAGAWA MASAHARU , NAGAI MAKOTO , MOCHIZUKI YOSHIHIKO
IPC分类号： F24F5/00
摘要： PURPOSE:To simplify a design of products with an excellent external appearance by deriving pipings and wirings from the lower part of a unit and improving general-purpose properties of laying the pipings and the elimination of piping work by providing versatility. CONSTITUTION:There are provided a piping lead-out hole 2 and wiring lead-out holes 3, 4 in an outdoor unit 1 of a floor installation air conditioner 1. For laying pipings for connection with an indoor unit the piping once taken out in the lower direction is altered in its direction to longitudinal, lateral, and downward directions.

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