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公开(公告)号：JPH085127A
公开(公告)日：1996-01-12
申请号：JP14016494
申请日：1994-06-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI
Abstract: PURPOSE:To prevent a compressor from being broken, and start the system safely and efficiently by controlling the starting sequence of a heat source side refrigerant cycle and usage side refrigerant cycle by providing an enabling flag for input/output signals, and time delay. CONSTITUTION:A multi-room cooling/heating device is equipped with a control unit 22 which is located between an indoor machine control unit 17 and outdoor machine control unit 20, and consists of a starting time control means 21. The starting time control means 21 controls the indoor machine control unit 17 and outdoor machine control unit 20 by an enabling flag for input/output signals of the control units 17, 20 and a time delay, by an operation sequence of an indoor flow valve 14, outdoor flow valve 11, refrigerant carrying device 12, and a compressor 1.
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公开(公告)号：JPH06147671A
公开(公告)日：1994-05-27
申请号：JP30197992
申请日：1992-11-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , KURACHI MASAO
Abstract: PURPOSE:To prevent refrigerant from being turned into two-phase before each of indoor side electrical valves in a device in which a plurality of indoor devices are connected in parallel to an outdoor device by a method wherein a controlling operation is carried out for restricting an upper limit of a degree of opening off the electrical expansion valves at the indoor device in response to a value of a degree of superheating at outlet pipes of a plurality of indoor devices. CONSTITUTION:Refrigerant discharged from an outdoor device 1 having a compressor, an outdoor heat exchanger and an expansion valve and the like is distributed into each of indoor devices 6a to 6c, its pressure is reduced by indoor electrical expansion valves 7 (7a to 7c), thereafter the refrigerant is evaporated at indoor heat exchangers 11 (11a to 11c) and then the refrigerant is returned back to the outdoor device 1. In such a multi-chamber type air conditioner, the outlet pipe of the indoor heat exchanger 11 is provided with means 8a to 8c for detecting the degree of superheating. An upper limit degree of opening of each of the indoor electrical expansion valves 7 is determined in a stepwise manner at the means 18a to 18c for determining the upper limit degree of opening in response to the value of the detected degree of superheating and at the same time the upper limit degree of opening and the degrees of opening calculated by the degree of opening calculation means 13a to 13c are compared by the degree of opening determining means 19a to 19c and then a degree of opening of the indoor electrical expansion valve 7 is determined.
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公开(公告)号：JPH0674590A
公开(公告)日：1994-03-15
申请号：JP22693792
申请日：1992-08-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , KINO AKIHIRO
Abstract: PURPOSE:To prevent two-phase formation of refrigerant before indoor side conductive expansion valves in each chamber when superheat degrees of refrigerants of all indoor units are raised and to prevent a decrease in capacity of the unit by so controlling to simultaneously close openings of the valves when all the superheat degrees of outlet tubes of the indoor units are a specified value or more. CONSTITUTION:The room cooling controller for a multichamber type air conditioner comprises heating degree detecting means 8a-8c for detecting superheat degree of outlet tubes of indoor side heat exchangers, room temperature detecting means 9a-9c for detecting room temperatures, and temperature setting means 10a-10c for setting a target temperature. Superheat degree deciding means 18 decides a protection control when all the superheat degrees detected by the means 8a-8c are a specified value (e.g. 15K) or more. Control switching means 19 switches a normal control and a protection control from a value of the means 18. Here, protection control time opening calculating means 20 calculates a value for simultaneously closing openings of all indoor side motorized expansion valves 7a-7c at the time of the protection control, and controls the valves 7a-7c by opening control means 17a-17c.
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公开(公告)号：JPH05203276A
公开(公告)日：1993-08-10
申请号：JP975892
申请日：1992-01-23
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , KURACHI MASAO
Abstract: PURPOSE:To provide a multi-room heater/cooler in which the valve travel of an outdoor flowrate valve is controlled based on judgement of whether a last one is stopped or a plurality of the heaters/coolers are stopped at the time of stopping, a system can be always stably operated in a high efficiency and a life of a refrigerant conveyor can be prolonged. CONSTITUTION:Subcooling degree calculating means 18 calculates subcooling degree from data of pressure detection means 16 and temperature detection means 17. An operation monitor 19 outputs a signal according to the value of subcooling degree and operating states of outdoor units (f), f' and indoor units (g), g' to outdoor control means 20a, 20b. Outdoor flowrate valve driving means 21a, 21b controls the valve travels of outdoor flowrate valves 11a, 11b according to signals from the means 20a, 20b.
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公开(公告)号：JPH05118622A
公开(公告)日：1993-05-14
申请号：JP28263191
申请日：1991-10-29
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , KURACHI MASAO , HIROSE KENJI
Abstract: PURPOSE:To restrict the flowing-in of liquid refrigerant into a refrigerant pump and eliminate a pressure pulsation by a method wherein a solenoid valve placed between an outlet of the refrigerant pump and a heat exchanger at a utilizer and another solenoid valve placed between an inlet port of the refrigerant pump and the second auxiliary heat exchanger are controlled during the cooling operation and each of various solenoid valves placed between the inlet port of the refrigerant pump and the heat exchanger at the utilizer and also placed between the outlet port of the refrigerant pump and the second auxiliary heat exchanger is controlled during the heating operation. CONSTITUTION:A solenoid valve on/off control means 25 opens the first solenoid valve 11 under an assumption that a refrigerant pump 10 compresses liquid in the case that a cooling mode sensing means 19 detects cooling state and a value inferred by a fuzzy inference means 4 is 1, performs a repetitive on/off of the third solenoid valve 13 and in turn opens both solenoid valves 11, 13 under an assumption that the refrigerant pump 10 does not perform any liquid compression when the result of fuzzy inference is not 1. At this time, the second and fourth solenoid valves 12, 14 are closed. When the heating mode is judged and the result of fuzzy inference is 1, the fourth solenoid valve 14 is opened and the on/off of the second solenoid valve 12 is repeated. When the result of the fuzzy inference is not 1, the solenoid valves 14, 12 are opened. At this time, the first and third solenoid valves 11, 13 are closed. Liquid refrigerant for the refrigerant pump 10 is restricted under the most suitable manner.
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Patent Agency Ranking
公开(公告)号：JPH05106923A
公开(公告)日：1993-04-27
申请号：JP9224691
申请日：1991-04-23
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , NAKAGAWA KEIJI , HAMAOKA KOJI , KAKITA KENICHI
Abstract: PURPOSE:To prevent forcible stop of an air-conditioner system, simultaneously performing an operation of a compressor for a long period and eliminate an overload due to repetition of start.stop by utilizing capacity of a power element of an inverter to a maximum value in an air-conditioner in which a driving power source frequency of the compressor is varied by the inverter. CONSTITUTION:An inverter-driven air-conditioner comprises pressure detecting means 9 of a pressure of a discharge tube of a compressor 8, sensed pressure deciding means for deciding the detected pressure of the tube by the means 9, and operating frequency deciding means 14 for deciding an operating frequency of the compressor by inputting the decision output of the means 15.
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公开(公告)号：JPH04312361A
公开(公告)日：1992-11-04
申请号：JP7920291
申请日：1991-04-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： OGAWA KEIJI , HAMAOKA KOJI , KAKITA KENICHI , NISHIO YASUNORI
Abstract: PURPOSE:To provide a controller for an air conditioner in which the device charging an electrolytic capacitor is miniaturized and which does not bring about wasteful power consumption and besides operates safely, concerning the limitation on the rush currents flowing in the electrolytic capacitor when an inverter is turned on, in the controller for an air conditioner fitted with an inverter. CONSTITUTION:A rush current limiting circuit 17, which comprises a rush current limiting resistor 14, a rush current limiting relay 15, and a diode 16, and a phase detection means 18 are provided, and the rush current limiting relay 15 is turned on only when charging an electrolytic capacitor 6. Moreover, the rush current limiting relay 15 operates when the phases of the two phases of a commercial AC power source 1 that the rush current limiting circuit 17 inputs are 0 deg..
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公开(公告)号：JPH04281393A
公开(公告)日：1992-10-06
申请号：JP4475791
申请日：1991-03-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KAKITA KENICHI , OGAWA KEIJI , HAMAOKA KOJI , NISHIO YASUNORI
Abstract: PURPOSE:To provide a controller for an air conditioner which eliminates a load to a system due to stop of a compressor by increasing an operating time of the compressor by using a power element of an inverter to its maximum capacity in the controller for the conditioner having the inverter for controlling the revolution of the compressor. CONSTITUTION:Temperature detecting means 8 for detecting a case temperature of a power element of an inverter 6, sensing temperature deciding means 14 for deciding detected case temperature, and operating frequency deciding means 13 for inputting a signal from the means 14 and deciding the operating frequency of a compressor, are provided.
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公开(公告)号：JPH04183276A
公开(公告)日：1992-06-30
申请号：JP30746990
申请日：1990-11-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , OGAWA KEIJI , HAMAOKA KOJI , KAKITA KENICHI
Abstract: PURPOSE:To reduce a current capacity of a rush current limiter and to suppress generation of wasteful power of a device by operating a rush current limiter only when an electrolytic capacitor is charged, and turning OFF the limiter while a compressor after finishing charge is being operated. CONSTITUTION:A circuit of the R phase of a commercial AC power source 1 - a thyristor 14a in a rush current limiter 14 - the positive electrode side of an electrolytic capacitor 6, the S phase of the power source 1 - a thyristor 14b in the limiter 14-the S phase input unit of a converter 3 is constituted to operate the limiter 14 only when the capacitor 6 is charged. Since its current capacity is small, the limiter 14 can be reduced in size. Further, wasteful power consumption can be suppressed.
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公开(公告)号：JPH04161752A
公开(公告)日：1992-06-05
申请号：JP28872690
申请日：1990-10-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIO YASUNORI , OGAWA KEIJI , HAMAOKA KOJI , KAKITA KENICHI
IPC: F24F11/02
Abstract: PURPOSE:To avoid unnecessary reduction in power in a protection of an output current and improve a comfortable state by a method wherein an output current in an inverter circuit is detected and a setting of a current value is varied in response to an operation mode and an amount of air in a fan. CONSTITUTION:An air conditioner comprises an operation mode sensing means 19 for sensing a signal from an operation mode setting device 10, a frequency command means 18 for judging a state of each of an indoor device 12 and an outdoor device 13 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 a comparing means 24 in respect to the command frequency determined by the frequency command means 18. With such an arrangement, an output current of an inverter circuit 16 is detected, and a setting of a current value for performing a protection is changed in compliance with the operation mode, an amount of air in a fan in respect to a direct relation of the operation mode and the amount of air in the fan and an output current of the invertor. In the event that there is a certain surplus state in an inverter circuit 16, its capability is applied as much as possible, thereby it is possible to avoid unnecessary reduction in capability at a protection of an output current in the air conditioner and further to improve a comfortable state.
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