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71. 发明专利

JPH11201589A HEAT PUMP TYPE AIR CONDITIONER 失效
公开(公告)号：JPH11201589A
公开(公告)日：1999-07-30
申请号：JP446898
申请日：1998-01-13
申请人： HITACHI LTD
发明人： ISHIHANE KYUHEI , KOKUNI KENSAKU , ENDO TAKESHI , TSUBOE HIROAKI , URATA KAZUMIKI , HAEDA YOSHIO , YAMADA SHINICHIRO , TAKENAKA HIROSHI
IPC分类号： F25B43/00
摘要： PROBLEM TO BE SOLVED: To obtain reliable heat pump type air conditioner where the function of a moisture eliminator can be fully displayed and a moisture absorbent being filled into the water eliminator cannot be worn out easily even when a relatively large amount of water is mixed into a refrigeration cycle. SOLUTION: In heat pump type air conditioner with a refrigeration cycle having a compressor 1, a four-way valve 2, a heat source side heat exchanger 8, an inflation device 4, and a utilization side heat exchanger 3, a bypass circuit 11 of a main pipe 19 via a water eliminator 10 by branching halfway through a main pipe for connection the heat source side heat exchanger 8 to the inflation device 4 and the pipe diameter of the bypass circuit is set to the same diameter as the main pipe or a large diameter than it.

72. 发明专利

JPH11118305A REFRIGERATING SYSTEM 失效
公开(公告)号：JPH11118305A
公开(公告)日：1999-04-30
申请号：JP28494097
申请日：1997-10-17
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , KOKUNI KENSAKU , YAMADA SHINICHIRO , ENDO TAKESHI , MATSUSHIMA HIROAKI
IPC分类号： F25B49/02
摘要： PROBLEM TO BE SOLVED: To prevent the damage of a device due to the erroneous sealing of a refrigerant different from a normal refrigerant by providing a deciding means for whether or not the sealed refrigerant is the normal refrigerant to be applied to a refrigerating cycle and a display means for displaying that it is not the normal refrigerant. SOLUTION: The relation between the air temperature of a condenser side and the outlet pressure of a compressor is previously obtained so as to meet the inlet pressure of each level and stored in an outdoor control panel 101. By using this relation, reference outlet pressure is calculated from the inlet pressure of the compressor and the air temperature of the condenser side measured during the operation of an air conditioner. It is decided whether or not a refrigerant is erroneously sealed by comparing the reference outlet pressure with outlet pressure measured during the operation of the air conditioner. When it is decided that the refrigerant is erroneously sealed, the outdoor control panel 101 transmits it to remote controllers 102 and 103 and displays it on the display parts of the remote controllers 102 and 103 or the display part of the outdoor control panel 101. Further, the operation of the compressor is forcedly inhibited by the outdoor control panel 101.

73. 发明专利

JPH11118270A AIR CONDITIONER 失效
公开(公告)号：JPH11118270A
公开(公告)日：1999-04-30
申请号：JP28494197
申请日：1997-10-17
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , YAMADA SHINICHIRO , NAKAMURA KENICHI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner where an outdoor machine designed for a new refrigerant is combined with an indoor machine designed for an old refrigerant according to the adoption of the new refrigerant where C1 is not included due to fluorocarbon regulation. SOLUTION: In an air conditioner where one outdoor machine is connected to a plurality of indoor machines, an outdoor machine 15b, an indoor machine 14a in a plurality of the indoor machines, and another indoor machine 14b are designed for R407C with a designed pressure of 3.3 MPa, R22 with a designed pressure of 3.0 MPa, and R407C, respectively. The refrigerant R407C for the outdoor machine is sealed in a refrigerant cycle, each indoor controlling device stores refrigerant identification data representing a refrigerant for each indoor machine, an outdoor controlling device inputs the refrigerant identification data from each indoor controlling device, a control algorithm in the outdoor controlling device is changed based on the R22 with the lowest design pressure in the identification data, and control is made for operation by a designed pressure or less with low R22 for indoor machine.

74. 发明专利

JPH10300254A AIR CONDITIONER 失效
公开(公告)号：JPH10300254A
公开(公告)日：1998-11-13
申请号：JP10493497
申请日：1997-04-22
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , YASUDA HIROSHI , KOKUNI KENSAKU , YOSHIDA YASUTAKA , YAMADA SHINICHIRO , NAKAMURA KENICHI
IPC分类号： F25B13/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner of a multi-room type which prevents the discharge pressure of a compressor from lowering too much even when a cooling operation is conducted in a state of an outdoor temperature being low, without increasing a working amount of refrigerant. SOLUTION: A first pressure and a second pressure higher than this and/or a first temperature and a second temperature higher than this are set in a control device 33 connected to a pressure sensor 31 and/or a temperature sensor 32. At the time of a cooling operation, a four-wag valve 6 to which a check valve 22 is connected is put in a heating operation when the discharge pressure of a compressor 5 becomes the first set pressure or below and/or when an outdoor temperature becomes the first set temperature or below, while the four-way valve 6 is put in the cooling operation when the discharge pressure of the compressor 5 becomes the second set pressure or above and/or when the outdoor temperature becomes the second set temperature or above.

75. 发明专利

JPH08121917A REFRIGERANT QUANTITY DETERMINING DEVICE 失效
公开(公告)号：JPH08121917A
公开(公告)日：1996-05-17
申请号：JP25786794
申请日：1994-10-24
申请人： HITACHI LTD
发明人： HIBINO YOZO , NAKAYAMA SUSUMU , YASUDA HIROSHI , YAMADA SHINICHIRO , NAKAMURA KENICHI , YOSHIDA SATORU
IPC分类号： F24F11/02 , F25B49/02
摘要： PURPOSE: To compute the percentage of refrigerant quantities based on the relation of a proper opening of an expansion valve to the opening of the expansion valve at a present time, and display the determination of the sealed refrigerant quantity. CONSTITUTION: A relation table 47 stores preliminarily information about a total rotary speed of a compressor during operation with a proper amount of refrigerant sealed in a heating cycle, a refrigerant vaporization temperature of an outdoor heat exchanger, and a total proper opening of an outdoor expansion valve. The proper opening of the expansion valve at that point of time is determined by reference to the relation table 47 by way of a reference mechanism 49 of the relation table. The rotary speed of the compressor and a detected temperature value of a vaporizer, which are indexes in the relation table 47, are input thereby determining the proper opening of each expansion valve at that point of time on reference to the relation table 47 based on the input values. Then, the ratio S of the proper opening of the expansion valve to the opening at that point of time is represented by a formula I S = opening/proper amount of opening, and the ratio S1 of the proper amount of refrigerant to the amount of refrigerants at that point of time is computed based on a formula II S1 =2-S, to display as a numerical value the determination results S1 of the amount of refrigerant on a display 42 by every specified time by a refrigerant quantity arithmetic operation mechanism 51.

76. 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.

77. 发明专利

JPH0821675A AIR CONDITIONER AND REFRIGERANT QUANTITY-DETERMINING METHOD THEREFOR 失效
公开(公告)号：JPH0821675A
公开(公告)日：1996-01-23
申请号：JP15440794
申请日：1994-07-06
申请人： HITACHI LTD
发明人： NAKAMURA KENICHI , YAMADA SHINICHIRO , TOGUSA KENJI , HIBINO YOZO
IPC分类号： F25B49/02
摘要： PURPOSE:To easily determine excess or insufficiency of sealed refrigerant quantity even by an unspilled operator or regarding a refrigerating cycle at the time of installing an air conditioner. CONSTITUTION:A compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, an indoor heat exchanger 5, and a vapor-liquid separator 6 are sequentially connected via tubes to constitute a refrigerating cycle. In order to detect the state of the cycle, a temperature sensor 7d is provided in the heat exchanger 3 or 5 to become an evaporator. When the cycle becomes a steady operation, a set expansion valve opening stored in memory means of a controller 40 is read based on the temperature detected by the sensor. A calculator 8 for reading the set expansion valve opening stored in memory means of a controller 40 based on the temperature detected by the sensor when it becomes a steady operation and comparing the value with the integrated value of the command value of the controller or the actual expansion valve opening to judge the excess or the insufficiency of the sealed refrigerant quantity from the ratio is provided in the controller.

78. 发明专利

JPH07260232A MULTI-ROOM AIR CONDITIONER AND CONTROLLING METHOD THEREFOR 失效
公开(公告)号：JPH07260232A
公开(公告)日：1995-10-13
申请号：JP4827494
申请日：1994-03-18
申请人： HITACHI LTD
发明人： HIBINO YOZO , NAKAYAMA SUSUMU , YASUDA HIROSHI , YAMADA SHINICHIRO , NAKAMURA KENICHI
IPC分类号： F24F11/02 , F24F3/06 , F24F11/00 , F25B1/00 , F25B13/00 , F25B49/02
摘要： PURPOSE:To provide a multi-room air conditioner having a controller for efficiently operating by minimizing power consumption of the conditioner having one outdoor unit and a plurality of indoor units. CONSTITUTION:A calculating mechanism for minimizing power consumption so corrects number of revolutions of a compressor 2 and an opening of an outdoor expansion valve 8 that an operating state of an air conditioner is not displaced from a predetermined range, and searches the state that a detected value of a power detector becomes small. Accordingly, it can directly hold an operation in which power consumption is minimum in addition to conventional control functions of maintaining stable and safe states of the compressor and outputting an air conditioning capacity corresponding to air conditioning loads in respective rooms, and perform energy conservation.

79. 发明专利

JPH06347141A OIL SEPARATOR FOR FREEZING APPARATUS 失效
公开(公告)号：JPH06347141A
公开(公告)日：1994-12-20
申请号：JP13817693
申请日：1993-06-10
申请人： HITACHI LTD
发明人： HAEDA YOSHIO , KOKUNI KENSAKU , YASUDA HIROSHI , NAKAYAMA SUSUMU , YAMADA SHINICHIRO , TOGUSA KENJI
IPC分类号： B01D17/025 , B01D17/032 , B01D45/08 , F25B43/02
摘要： PURPOSE:To provide an oil separator having a mechanism wherein oil involved in refrigerant gas discharged from a freezer is separated with an easy structure, and oil subject to double layer separation between the oil and a liquid refrigerant dissolved in the oil when fresh air temperature is lower is securely supplied to a compressor bearing portion. CONSTITUTION:An oil separator 1 comprises a cylindrical separation plate 5 provided upward, a reservoir for separated oil provided downward, a dam 8, and an oil return pipe 4. Refrigerant gas enters horizontally at an upper location and collides with the cylindrical separation plate 5, whereby the oil is separated and allowed to pass through a lower portion of the separation plate 5, and then enters the inside of the separation plate. Thereafter, the oil advances to the upper portion and is discharged to the outside from the upper discharge pipe 3. As fresh air temperature is low, the oil in the refrigerant gas is condensed and is accumulated on the bottom and exceeds the dam 8 to flow to the inside 9a.

80. 发明专利

JPH06235571A OIL SEPARATOR OF REFRIGERATING PLANT 失效
公开(公告)号：JPH06235571A
公开(公告)日：1994-08-23
申请号：JP2236793
申请日：1993-02-10
申请人： HITACHI LTD
发明人： HAEDA YOSHIO , NAKAYAMA SUSUMU , YASUDA HIROSHI , KOKUNI KENSAKU , YAMADA SHINICHIRO , TOGUSA KENJI
IPC分类号： B01D45/06 , B01D45/08 , F25B43/02
摘要： PURPOSE:To obtain an oil separator which achieves an oil separating performance in a wide range of treating flow rate with a simple mechanism to easily separate oil contained in the refrigerant gas discharged from a refrigerator. CONSTITUTION:An oil separator is a cylindrical closed container with a refrigerant gas inlet and outlet on top, and has such an oil separation mechanism that oil is separated along the refrigerant gas flow in the up and down directions. The major parts of the oil separating mechanism are a collision plate 9 and a demister 8. In the oil separating mechanism, the oil is separated by the collision plate 9 after separated by the demister 8.

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