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公开(公告)号：JPH08145482A
公开(公告)日：1996-06-07
申请号：JP28659494
申请日：1994-11-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , NAKAGAWA NOBUHIRO
IPC: F25B1/00
Abstract: PURPOSE: To safely continue the operation by preventing the stop of an equipment due to the overcurrent at the time of heating at a low load in a refrigerating cycle using a non-azeotrope refrigerant. CONSTITUTION: The multi-chamber split type heater comprises temperature sensors 10a, 10b for detecting an indoor side heat exchanger outlet temperatures, a discharge pressure sensor 18, a current sensor 19, temperature difference calculating means 26a, 26b for calculating the temperature difference between the saturated gas temperature calculated from the discharge pressure and the temperatures from temperature sensors 10a, 10b, target temperature different calculating means 28a, 28b for calculating target temperature difference based on the output current value of a compressor 1, and indoor side expansion valve operating means 30a, 30b for so controlling to switch indoor side expansion valves 8a, 8b as to arrive at the target temperature difference.
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公开(公告)号：JPH06294541A
公开(公告)日：1994-10-21
申请号：JP8173393
申请日：1993-04-08
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI
Abstract: PURPOSE:To satisfy fast response of a cycle and comfortableness in a room by controlling the optimum opening of a room side electric expansion valve based on the results of reasoning by a 2 input fuzzy reasoning. CONSTITUTION:The optimum opening of room side electric expansion valves 7a-7c is controlled based on the results of reasoning made by a 2 input fuzzy reasoning means 21. In other words, computation is performed for the opening of a plurality of the room side electric expansion valves 7a-7c, the opening of the room side electric expansion valves 7a-7c as determined by a room temperature computing means 18 by a control rule based on an empirical rule from the sizes of a deviation between the room temperature and a set temperature and a deviation between the degree of overheating of an outlet piping of the room side heat exchangers 11a-11c and a target value of the degree of overheating and the optimum opening by a 2 input fuzzy reasoning. This enables the satisfying both of the fast response of a cycle and comfortableness in a room.
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公开(公告)号：JPH05332595A
公开(公告)日：1993-12-14
申请号：JP14403992
申请日：1992-06-04
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , KURACHI MASAO
Abstract: PURPOSE:To realize comfortable environment inside rooms and energy saving by a method wherein the valve travels of outdoor flow valves are mode larger than the set ones when two or more outdoor units are started or stopped. CONSTITUTION:An outdoor unit capacity judgement means 16 decides the capacity distribution of two or more outdoor units f and f' against changes in load on two or more indoor units g and g'. When the two or more outdoor units f and f' are started, an outdoor flow valve means 17 and a compressor means 18 receive signals from the outdoor unit capacity judgement means 16, and the valve travels of outdoor flow valves 11a and 11b are made larger than the set ones. When the two or more outdoor units are stopped, the valve travels of the flow valves are also made larger. Thereby, a decline in capacity caused by a sharp fluctuation in capacity can be prevented and a decline in reliability of devices due to hunching phenomena is prevented.
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公开(公告)号：JPH04308476A
公开(公告)日：1992-10-30
申请号：JP7288091
申请日：1991-04-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMAOKA KOJI , OGAWA KEIJI , KAKITA KENICHI , NISHIO YASUNORI
Abstract: PURPOSE:To provide an air conditioner controller provided with an inverter which can operate safely without wasting power by limiting rush current flowing into an electrolytic capacitor upon turn ON of power supply for the inverter thereby downsizing the charger for the electrolytic capacitor. CONSTITUTION:The controller comprises a surge current limiting circuit 16 for conducting between a pair of input and output of an electromagnetic contactor 2 through a current limiting relay 17 while furthermore conducting between the other input of the electromagnetic contactor 2 and the positive output of a converter circuit 3 through a current limiting resistor 18 and a diode 19, and means 15 for differentiating the output from a voltage detecting means 11. At the start of operation, the current limiting relay 17 is turned ON to charge a capacitor 6 and when differentiated value of the charged voltage drops below a prescribed value, the current limiting relay 17 is turned OFF to turn the electromagnetic contactor 2 ON thus driving an inverter circuit 7 through an inverter base drive circuit 13.
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公开(公告)号：JPH04161753A
公开(公告)日：1992-06-05
申请号：JP28873790
申请日：1990-10-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： OGAWA KEIJI , KAKITA KENICHI , HAMAOKA KOJI , NISHIO YASUNORI
IPC: F24F11/02
Abstract: PURPOSE:To avoid unnecessary reduction in capability in an output current protection and improve a comfortable state by a method wherein an output current of an inverter is detected and then a setting of a current value is varied in compliance with a temperature of surrounding air and an amount of air in a fan. CONSTITUTION:An air conditioner comprises of a current value determining means for determining a current value for applying a protection against an inverter circuit 15 is response to an output of a fan air volume control means 22, a comparator means 24 for comparing the determined current value with a current value detected by a current value detecting means 21, a frequency command means 17 for judging states of an indoor device 11 and an outdoor device 12 and commanding a frequency for operating a compressor 1, and a frequency determining means 25 for determining a frequency operated on the basis of a result determined by the comparator means 24 at a command frequency determined by the frequency command means 17. With such an arrangement, an output current of an inverter circuit 15 is detected, and a setting of the current value for performing a protection is changed in compliance with a temperature of surrounding air and an amount of air of a fan and when there is a certain surplus state in the inverter circuit 15, its capability is applied as much as possible and then it is possible to avoid unnecessary reduction in an output current protection of the air conditioner and to improve a comfortable state in a room.
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Patent Agency Ranking
公开(公告)号：JPH0446589A
公开(公告)日：1992-02-17
申请号：JP15481790
申请日：1990-06-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： OGAWA KEIJI , NISHIO YASUNORI
Abstract: PURPOSE:To maintain a voltage-frequency characteristic optimal for a compressor at all times by taking in a waveform pattern having an optimal voltage- frequency characteristic from a waveform memory based on a signal provided from a voltage detector and then producing and outputting a waveform. CONSTITUTION:Voltage-frequency characteristics of waveform patterns A', B', C' stored in a waveform memory 21 are optimized by the output voltage drop of an inverter 19 due to variation of load on a compressor 1. When the load decreases from a state where a waveform pattern 'B' is outputted within such range of input voltage V to the compressor 1 as V2>=V>=V3, the input voltage V at an inverter output frequency (f) will be V>V1 and the waveform memory 21 modifies the waveform pattern from 'B' to 'A' thus bringing the input voltage V close to a value V0 for an optimal voltage-frequency characteristic. Furthermore, since V2>=V>=V3 is maintained so long as the load maintains constant, the waveform 'A' is sustained and an air-conditioner is operated with the optimal voltage-frequency characteristic regardless of variation of load.
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公开(公告)号：JP2001317790A
公开(公告)日：2001-11-16
申请号：JP2000138675
申请日：2000-05-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI
IPC: F24F11/02
Abstract: PROBLEM TO BE SOLVED: To judge abnormality of an air conditioner accurately regardless of difference in the outer air temperature, the length of refrigerant piping or the installation environment, e.g. the operating horse power. SOLUTION: This diagnostic unit for air conditioner comprises a first operating means 10 for executing cycle simulation of refrigeration cycle characteristics under normal state and calculating the normal operational values and the quantity of refrigerant even when the installation environment, e.g. the outer air temperature, is varied, and a refrigerant diagnostic means 12 for comparing detection values of the air conditioner with calculation values to judge, especially, whether the quantity of refrigerant is normal or abnormal. Since a decision can be made accurately whether the quantity of refrigerant is normal or abnormal under any installation conditions, failure tendency of a compressor can be found in the early stage and the compressor can be protected against damage.
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公开(公告)号：JPH11337236A
公开(公告)日：1999-12-10
申请号：JP14900298
申请日：1998-05-29
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI
IPC: F25B49/02
Abstract: PROBLEM TO BE SOLVED: To prevent the breakage of a compressor, to save the quantity of a refrigerant to be sealed, and to minimize the installation work time by judging the shortage of the refrigerant to obtain the appropriate quantity of the refrigerant to be sealed based on the relationship between the piping temperature in the vicinity of an inlet of the compressor, the outside temperature, the set value of the piping length, and the pre-determined quantity of the refrigerant sealed in the refrigeration cycle. SOLUTION: The breakage of a compressor is prevented by providing a trial running means 10 to judge the presence/absence of the trial run, a temperature sensor Th0 installed in the vicinity of an inlet of a compressor 1 and a temperature operating means 11 to digitize the signal from the temperature sensor Th0, a piping length setting switch 12 to set the piping length and a piping length operating means 13 to digitize the piping length from the value of the piping length setting switch 11, and a refrigerant sealing quantity judging means 14 to judge the appropriate/inappropriate quantity of the refrigerant to be sealed based on the relationship between the compressor inlet temperature, the piping length and the quantity of the refrigerant sealed to determine the appropriate quantity of the refrigerant sealed according to the piping length during the trial run, the optimum refrigerant can be sealed in the installation mode, the refrigerant is saved, the working time is minimized, and the over-sealing of the refrigerant is prevented.
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公开(公告)号：JPH10185282A
公开(公告)日：1998-07-14
申请号：JP34726596
申请日：1996-12-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , AOYAMA SHIGEO
Abstract: PROBLEM TO BE SOLVED: To improve reliability of a refrigerant conveyance pump by controlling a plurality of the different capability refrigerant conveyance pumps such that operation frequencies thereof are uniform in an air conditioner comprising a heat source side refrigeration cycle and a utilization side refrigeration cycle without losing comfortability of an indoor environment in the utilization side freezing cycle. SOLUTION: There are provided pump control means PCNT where operation interruption control for a plurality of different capacity refrigerant conveyance pumps is performed in conformity with the degree of refrigerant superheating of an indoor unit outlet assembly pipe of a utilization side refrigeration cycle, and first bypass opening calculation means 15 for calculating an opening where a flow rate is properly set by a first bypass flow rate valve BP1. Hereby, operation frequency of the refrigerant conveyance pump is made uniform without destroying the balance of the utilization side refrigeration cycle, and the system is continuously operated without hindrance of comfortability of an indoor environment.
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公开(公告)号：JPH109694A
公开(公告)日：1998-01-16
申请号：JP16137396
申请日：1996-06-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , AOYAMA SHIGEO
IPC: F25B1/00
Abstract: PROBLEM TO BE SOLVED: To control optimum refrigerant circulating amount of an application side refrigerating cycle for an indoor side air conditioning load amount by calculating an indoor operation horsepower ratio in an indirect refrigerant air conditioning system having a heat source side refrigerating cycle and the user side cycle. SOLUTION: A ratio of total operation horsepower number calculated by an operation horsepower number calculating means to that calculated by a connecting horsepower number calculating means 17 is calculated by an operation horsepower ratio calculating means 19 to calculate an indoor side air conditioning load amount. Frequencies and number of a plurality of refrigerant conveying pumps PM installed at a refrigerant conveyor PU are controlled by the ratio (indoor side air conditioning load amount), suitable refrigerant circulating amount corresponding to the load amount can be controlled to improve comfortableness of an indoor environment.
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