Title:
Hot-water supply machine system
Document Type and Number:
Japanese Patent JP6115155
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a water heater system in which a speaker makes little noise while a remote controller is using a communication function.SOLUTION: There is provided a water heater system comprising a remote controller equipped with a communication function. A transmission circuit 1 configured to transmit a remote control signal is formed of a communication IC3 configured to oscillate an analogue signal corresponding to the remote control signal generated by a microcomputer 2; and a PIN diode 11 configured to short-circuit the communication IC3 and a communication line in response to the control signal from the microcomputer 2. During the period from start to end of transmission of the remote control signal, the PIN diode 11 is maintained in a short-circuited state, thereby preventing change in impedance of the communication line during transmission of the remote control signal. The control signal is supplied to the PIN diode 11 via an RC circuit 12, such that a resistance value of the PIN diode gradually varies, thereby preventing rapid fluctuation in impedance.
Inventors:
Kazuki Hiraoka
Application Number:
JP2013016403A
Publication Date:
April 19, 2017
Filing Date:
January 31, 2013
Export Citation:
Assignee:
Noritsu Co., Ltd.
International Classes:
H04M9/00; F24H1/00; H04Q9/00
Domestic Patent References:
| JP5068288A | ||||
| JP61052049A | ||||
| JP2003314888A |
Attorney, Agent or Firm:
Shogo Sano
Kiyoshi Samukawa
Kiyoshi Samukawa