Matsushita Electric Industrial Co., Ltd.

Akira Yokouchi

Masaaki Sato

Kunio Yoshida

Motohiko Naka

Takehiko Shida

Mie Saitoh

Katsuhiko Fujiwara

Makoto Shimizu

Ikuo Akamine

Masahiro Watanabe

Katsumi Fukuda

Keiichi Kuriyama

Makoto Kaibara

A pattern classification system includes a plurality of classification sections. Each of the classification sections includes a device for storing information of N coefficients W representing a reference pattern, a device for calculating an evaluation value V on the basis of N input signals S and the N coefficients W, the N input signals representing an input pattern, the evaluation value V representing a relation between the input pattern and the reference pattern, a device for storing information of a fixed threshold value R, and a device for comparing the evaluation value V and the threshold value R and for outputting an estimation signal depending on a result of the comparing, the estimation signal including a category signal P which represents a category. A selection section is operative for selecting one of categories in response to the category signals outputted from the classification sections and for outputting a signal Px representing the selected one of the categories. An adjustment section is operative for adjusting parameters in the classification sections in response to the output signal Px of the selection section and a teacher signal T, the parameters including the coefficients W.

Pattern classification system

In a temperature control system when can be operated as a heat pump, frost deposited onto an outdoor heat exchanger (evaporator) is detected by a change in temperature of the refrigerant which flows into an indoor heat exchanger (condenser), so that a sensor to detect the deposition of the frost need not be attached to the outdoor heat exchanger. The refrigerant temperature is measured at the inlet of the indoor heat exchanger, and the temperature control system is switched to defrosting operation on the basis of this temperature and various elapsed time periods if the actual heat capability of the incoming refrigerant is insufficient, detecting the temperature of the refrigerant on the inlet side of the indoor heat exchanger, namely, by detecting the temeprature at a single position. Therefore, there is no need to use the frost deposition sensor on the outdoor side, frost deposition discriminating circuit by the signal of this sensor, signal lines to connect the frost deposition discriminating circuit with the main control circuit and the like which are provided in the room, and the like, so that the circuit can be simplified.

Defrosting control apparatus for a temperature control system

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Shiga, Japan

Akira Yokouchi