JP5679851B2 - Device with remote control - Google Patents

Description

  The present invention relates to an apparatus having a remote controller, which includes an apparatus main body and a remote controller connected to the apparatus main body.

  For example, when a gas hot water supply device is taken as an example, the gas hot water supply device is often installed outdoors so that exhaust gas can be easily discharged and combustion noise does not become a noise for the user. Therefore, the operation for controlling the operation of the hot water supply apparatus main body is not performed on the hot water supply apparatus main body, but on the remote controller connected to the hot water supply apparatus main body.

  The remote control is provided with operation switches for performing various operations. The remote control is installed in a room such as a kitchen wall, and the operation of the water heater main body is controlled by pressing the remote control operation switch. It is configured as follows. There is also a type of remote control that incorporates a microcomputer in the remote control and when the operation switch is turned on, the control content corresponding to the turned on operation switch is converted into a digital signal and sent to the hot water supply device body. However, there is a problem that the unit price of the remote controller becomes high because the number of input ports of the microcomputer in the remote controller increases.

  Therefore, there is a remote controller in which a plurality of resistors are connected in series and these resistors are divided resistors. If each operation switch is connected in parallel to each voltage dividing resistor, when the operation switch is turned on, the voltage dividing resistor to which the turned on operation switch is connected is short-circuited. The voltage value changes. If the voltage value, which is an analog signal, is input to the microcomputer in the main body of the hot water supply device, the microcomputer determines which operation switch has been pressed on the microcomputer side of the main body of the appliance from the changed voltage value. The main body can be controlled. As described above, it is known that an operation switch is connected in parallel to a voltage dividing resistor to determine which operation switch is turned on from a divided voltage value (see, for example, Patent Document 1).

  Note that such a remote control is not limited to the one that controls the hot water supply device. For example, the lighting device installed on the ceiling in the bathroom is used as the device body, and the inside of the bathroom is used to control the illuminance and on / off state of the lighting device. It is also applied to those equipped with a remote control installed on the wall.

JP-A-6-51893 (FIG. 1)

  In the above-described conventional device, it is desirable that the voltage applied to both ends of the voltage dividing resistor connected in series is kept constant at an accurate value. Therefore, it is desirable to apply a constant voltage via the regulator. However, because there is variation among regulators, the output voltage of the regulator is not constant for each individual remote controller even if the same standard guulator is used. There is a bug. As described above, if the voltage that is the basis of the divided voltage value varies, there is a possibility that the determination as to which operation switch has been pressed is erroneously determined.

  In the case of a hot water supply device, the main body of the hot water supply device has a built-in load such as a motor, and the remote control has a built-in load such as a buzzer. When these loads are activated, the supply voltage to the regulator changes. As a result, the output voltage of the regulator may change or the supply voltage to the microcomputer may change. When the voltage changes in this way, there is a possibility that the determination as to which operation switch has been pressed is erroneously determined as described above.

  In view of the above problems, an object of the present invention is to provide an apparatus including a remote controller that does not erroneously determine which of the operation switches of the remote controller has been pressed.

In order to solve the above-mentioned problems, a device equipped with a remote control according to the present invention is installed in a place separate from the device main body, has a plurality of resistors inside, and connects these resistors in series. Provided with an operation switch connected in parallel to the resistor, and provided with a remote controller for inputting a divided DC voltage value that changes depending on the ON / OFF state of the operation switch to the microcomputer in the apparatus main body. Until the time elapses, the operation switch detects the inherent variation of the remote control connected to the device body from the DC voltage value detected without any of the operation switches being turned on. The reference voltage for judging the on / off state of the signal is corrected.

The voltage that accompanies the operation of the load by detecting the change in the DC voltage value due to the operation of the load in the remote control and the load in the device body, and correcting the reference voltage for judging the on / off state of the operation switch Eliminate the effects of change.

  Further, a correction value for correcting the reference voltage may be stored in advance on the apparatus main body side.

  As apparent from the above description, the present invention reads the voltage value divided in a state where none of the operation switches is turned on, and compares it with the reference voltage, so that the solid state of the remote controller such as the variation of the regulator is obtained. Each variation can be corrected.

The figure which shows the structure of one embodiment of this invention Block diagram showing the internal structure of the water heater main body and remote control

  With reference to FIG. 1, an embodiment of the present invention will be described below by taking a hot water supply device as an example. Reference numeral 1 denotes a water heater main body, which is installed outdoors. Reference numeral 2 denotes a remote controller for controlling the operation of the hot water supply apparatus main body 1, and the hot water supply apparatus 1 and the remote control 2 are connected by three cables. These three cables are power lines 31 and 32 for supplying power from the water heater main body 1 to the remote controller 2 and communication for transmitting control signals (divided voltage values) from the remote controller 2 to the water heater main body 1. Line 33.

  The remote control 2 is provided with operation switches 21, 22, and 23, which are connected in parallel to each of the three voltage dividing resistors 41, 42, and 43 among the voltage dividing resistors as shown in FIG. ing. The power line 31 is on the plus side, and the output voltage from the 12 volt regulator 53 in the hot water supply apparatus body 1 is input to the 5 volt regulator 4 in the remote controller 2. The voltage dividing resistors 41, 42, and 43 have different resistance values.

  The output voltage of the 5-volt regulator 4 is applied to the voltage dividing resistors 41, 42, and 43. Then, the voltage at the intermediate point A (intermediate potential) is input to the microcomputer 5 in the hot water supply apparatus 1 through the communication line 33 as described above. When any one of the operation switches 21, 22, and 23 is pushed and turned on, the voltage dividing resistor connected in parallel to the operation switch that is turned on is short-circuited, so that the resistance value of the entire voltage dividing resistor is Change. Therefore, the voltage value at point A changes. From the changed voltage value, the microcomputer 5 can determine whether the operation switch has been pressed. In addition, 51 is a load such as a motor installed in the hot water supply apparatus main body 1, and 52 is a 5-volt regulator.

  The 5 volt regulator 4 incorporated in the remote controller 2 may vary slightly in output voltage from one solid to another. Therefore, when the microcomputer 5 is started by resetting, about 1 second is set as a predetermined time from the start time, and it is assumed that none of the operation switches 21, 22, 23 is pressed within the set time. The microcomputer 5 captures the voltage at point A at that time. If the output voltage of the 5-volt regulator 4 is in accordance with the set value, the reference voltage stored in advance in the microcomputer 5 matches the voltage at the point A taken in. If they do not match, it is determined that the output voltage of the 5-volt regulator 4 is shifted, and the reference voltages for determining that the operation switches 21, 22, and 23 are pushed are shifted and corrected. .

  If the operation is continued in this state, the microcomputer 5 detects the voltage drop when the loads 24 and 51 are operated, and how much the reference voltage is shifted when the loads 24 and 51 are operating. Judgment was made.

  As described above, the reference voltage stored in the microcomputer 5 in advance as a uniform value is corrected according to the variation of each remote controller 2 actually connected and the operation of the loads 24 and 51 actually connected. By doing so, it is possible to accurately determine which operation switches 21, 22, and 23 have been pressed without erroneous determination.

  In the above embodiment, the deviation from the reference voltage is measured and corrected each time. However, the correction amount is stored in the microcomputer side in advance, and the correction set in advance according to the operating condition of the load. May be performed.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention. For example, the device is not limited to a hot water supply device, for example, a lighting device installed on the ceiling of a bathroom may be used as the device, and in addition, if the present invention is applicable, it is not limited to any device. Absent.

DESCRIPTION OF SYMBOLS 1 Hot-water supply apparatus main body 2 Remote control 21, 22, 23 Operation switch 5 Microcomputer

Claims (3)

Installed in a separate location from the main body of the device, has a plurality of resistors inside, and connects these resistors in series, and provides operation switches connected in parallel to each resistor, depending on the on / off state of the operation switches In a device with a remote controller that inputs a variable divided DC voltage value to the microcomputer in the main body of the device, all of the operation switches are turned on immediately after the microcomputer is reset and until a predetermined time elapses. From the DC voltage value detected in the state that is not, detecting the inherent variation of the remote control connected to the apparatus body, and correcting the reference voltage for determining the on / off state of the operation switch, A device with a remote control. 2. The reference voltage for judging the on / off state of the operation switch is corrected by detecting a change in the DC voltage value caused by the operation of the load in the remote controller and the load in the apparatus main body. A device with a remote control.   The apparatus having a remote control according to claim 1 or 2, wherein a correction value for correcting the reference voltage is stored in advance on the apparatus main body side.

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