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    AIR CONDITIONING DEVICE
    66.
    发明专利
    AIR CONDITIONING DEVICE 失效

    公开(公告)号：JPH10141739A

    公开(公告)日：1998-05-29

    申请号：JP29351996

    申请日：1996-11-06

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： YOSHIDA IZUMI ,  OGATA HIDEO

    IPC: F04B49/06 ,  F24F11/02 ,  F25B1/00

    Abstract: PROBLEM TO BE SOLVED: To obtain a sufficient heating value by a simple method, and in addition, perform a heating which is suitable for an environmental condition for a pre-heating method of a compressor when a compression means stops. SOLUTION: When a compression means stops, for a power source converting means 20, two phases of a three phase output terminal, are made equal to a negative electric potential of a DC voltage, and the remaining phase is made a first electric potential for a first state. Also, the two phases are made equal to a positive electric potential of the DC voltage, and the remaining phase is made a second electric potential for a second state. When a temperature which is obtained by a compressor temperature detecting means 13, is lower than a control starting temperature, a wave shape by which the frist state and the second state are repeated by a certain cycle, is transmitted from a control means 3, and by doing so, a pre-heating of a compressor 2 is made possible, and in addition, by obtaining a temperature information by the compressor temperature detector 13 and an indoor unit peripheral temperature detector 14, the pre-heating of the compressor 2, which is suitable for an environmental condition, can be performed.

    INVERTER CONTROL METHOD FOR AIR CONDITIONER AND ITS CONTROLLER
    67.
    发明专利
    INVERTER CONTROL METHOD FOR AIR CONDITIONER AND ITS CONTROLLER 失效

    公开(公告)号：JPH09182493A

    公开(公告)日：1997-07-11

    申请号：JP34143095

    申请日：1995-12-27

    Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

    Inventor： ITO YOSHITERU ,  TSUCHIYAMA YOSHIRO ,  MATSUI KEIZO ,  YOSHIOKA KANEHARU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  WATAKABE SHUSAKU

    IPC: H02P27/08 ,  H02P27/06 ,  H02P7/63

    Abstract: PROBLEM TO BE SOLVED: To perform current limitation control stably and quickly to the change of an operation current value, in full range of operation range, by performing the gain compensation using the primary formula of limited frequency, for the quantity of change of the limited frequency to a motor for a compressor. SOLUTION: A limited frequency computing unit 11 computes stageless limited frequency F1td-f(k) by the sampling value I(k), the command frequency Fset(k) (=Fset), and the tolerable current value Iset(k) (=Iset) from a current measuring instrument 10, and the limited frequency being the last control operation result from a limited frequency storage 12. A gain compensator and processor 18 performs gain compensation by the quantity dFdef-f(k) of the change of limited frequency and the limited frequency F1td(k) stored in the limited frequency storage 12. This computes the quantity dFdef-g(k) of the change of the compensation frequency limitation. Hereby, gain varies with operation frequency can be obtained, and proper current limitation control can be performed.

    HEATER DEVICE FOR COMPRESSOR
    68.
    发明专利
    HEATER DEVICE FOR COMPRESSOR 失效

    公开(公告)号：JPH09113039A

    公开(公告)日：1997-05-02

    申请号：JP26672995

    申请日：1995-10-16

    Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

    Inventor： WATAKABE SHUSAKU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  TSUCHIYAMA YOSHIRO ,  MATSUI KEIZO ,  ITO YOSHITERU ,  YOSHIOKA KANEHARU

    IPC: F25B1/00

    Abstract: PROBLEM TO BE SOLVED: To heat a compressor and eliminate a useless consumption of electrical power only when refrigerant is being liquified by a method wherein a state of refrigerant is estimated in response to a discharging temperature and a discharging pressure of a compressor, a chopping wave-form is outputted in response to the estimated output and an output of a frequency instruction part of the compressor so as to drive the compressor. SOLUTION: Each of an output of a discharging pipe temperature sensor 11 for use in sensing a discharging temperature of a compressor 1 and an output of a pressure sensor 12 for use in sensing a discharging pipe pressure is inputted to a refrigerant state estimating means 13. The refrigerant stateestimating means 13 outputs ON indicating that the refrigerant is liquified in the case that the discharging pipe pressure is A1 and a discharging pipe temperature T1 at that time is lower than a saturation temperature Tα of the refrigerant. If the temperature is lower than the saturation temperature Tα, it may output ON indicating that the refrigerant is liquified. In addition, if the temperature is higher than the saturation temperature Tα, it is estimated that all the refrigerants are in gas state so as to output OFF. A control circuit 6 has as its input, an ON output fed from the refrigerant state estimating means 13 and an output of the frequency instruction part 14 for outputting a frequency driving the compressor 1, outputs a chopping wave-form to a frequency variable setting device 5 so as to heat the compressor 1.

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