JP2000282546A - Sanitary equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption especially during standby by providing a circuit for intermitting current flowing to a zero-crossing detecting section. SOLUTION: A zero-crossing detecting section energization ON/OFF section 7 is connected to a portion between an AC line 2 and a zero-crossing detecting section 6. Timing at which an AC load 10 is turned on is set to the same as timing of the zero crossing, in order to suppress noise and rush current. Next, when the AC load 10 is turned on after a predetermined phase from the zero crossing in order to control energization power supplied to the AC load 10, as well, input timing from the zero-crossing detecting section 6 is employed. When energization to the zero-crossing detecting section 6 is turned on/off, the repetition period of zero-crossing input is confirmed after power supply, and the ON/OFF section 7 is turned off when power consumption should be reduced. Thus, power loss at the zero-crossing detecting section 6 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the use of zero-cross detection to control the AC load and to reduce the power consumption of a device having a timer function. Equipment related.

[0002]

2. Description of the Related Art Conventionally, sanitary appliances having zero-cross detection have used a zero-cross timing to control an AC load or have a timer function using the zero-cross as a reference clock.

[0003] Sanitary equipment refers to sanitary washing equipment, faucet equipment, sanitary ware washing equipment, dishwasher, bathroom dryer, water heater, bathtub equipment, ion water purifier, water purifier, hand-wash dryer. Is shown.

[0004] Also, the "zero cross", "AC
The “load”, “timer function”, and “reference clock” are as follows. The AC input voltage of the commercial power supply has a sine waveform (sine curve). This AC input voltage is 0V or
The moment when the value becomes close to 0 V is called zero cross in the sense that it crosses zero volt. Examples of the AC load include a hot water heater, a toilet seat heater, a drying heater, and an indoor heating heater of the sanitary washing toilet seat. As an example of the timer function, there is a reservation timer for ON time and OFF time of indoor heating of the sanitary washing toilet seat. The description of the reference clock will be described below. In an area where the commercial power supply is 50 Hz, a zero cross occurs every 1 / (50 × 2) = 0.01 seconds. If zero crosses are input 100 times on the basis of this 0.01 second, it is counted as 1 second. If zero crosses are input 6,000 times, it counts as one minute. In this manner, a long timer count can be performed based on the zero cross.

[0005]

However, in a conventional sanitary appliance having zero-cross detection, a voltage-dropping or current-limiting resistor is used in the zero-cross detector, and a current always flows through the resistor. Was. For this reason, the power consumption during standby may not be sufficiently reduced due to the power loss of the resistor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sanitary appliance having reduced power consumption, particularly power consumption during standby.

[0007]

In order to achieve the above object, a circuit for intermittently flowing a current flowing through a zero-cross detecting section is provided. As a result, the current does not always flow through the zero-crossing detector voltage drop resistor and the current limiting resistor.
Since the current can be intermittently supplied, the power loss in the zero-cross detector can be reduced.

[0008]

FIG. 1 is a block diagram showing an embodiment of a sanitary appliance having a control device including a zero-crossing detecting section, an AC load such as a heater and a motor, and a timer function. AC
The AC line 2 input from the input 1 is stabilized at DC 24 V by the DC power supply unit 3. Thereafter, the DC power is stabilized at 5 V DC by the DC power supply unit 4 and supplied as power to the CPU 5 and other control units. Between the AC line 2 and the zero-cross detector 6, a zero-cross detector energization ON / OFF unit 7 is connected. A zero-cross signal is input from the zero-cross detector 6 to the CPU 5. The CPU 5 outputs an energization ON / OFF signal to the zero-cross detection unit to the zero-cross detection unit energization ON / OFF unit 7. The CPU 5 has a timer count unit 8 based on a zero cross signal. A
The C drive unit 9 is connected to the AC line 2 and has a CPU
The AC signal is output to the AC load 10 by the output signal from the AC load 5. The AC drive unit 11 and the AC load 12 are also connected to the AC drive unit 9 and A
Same as C load 10.

An example in which the timing of the zero-cross input is used for controlling the AC load will be described below. First, an example of turning on at a zero-cross timing will be described. AC load 10 to O
N is turned on at a zero-cross timing to suppress noise and inrush current. This zero-cross timing is based on an input from the zero-cross detector 6.

Next, an example of controlling the phase of the AC load will be described. In order to control the power supplied to the AC load, the timing of input from the zero-crossing detector 6 is similarly used even when the power is turned on after a certain phase from the zero-crossing. An example in which a zero-cross signal is used as a reference clock for the timer function will be described. A timer based on a zero-cross signal is used for a long-time timer such as a reserved time for indoor heating and a clock function.

Next, the power supply to the zero-cross detector is turned ON / O.
An example of performing FF will be described. FIG. 2 is a time chart showing respective voltage waveforms of AC input, zero-cross detection section energization ON / OFF, and zero-cross input. First, after turning on the power, it is confirmed that the cycle T1 of the zero-cross input is constant. Next, when it is desired to reduce the power consumption, such as when the sanitary device is on standby, the power supply ON / OFF unit 7 of the zero-cross detection unit is turned off, and the power consumption of the zero-cross detection unit 6 is reduced. Turn off from ON after T2 of zero cross input, (T1 × 3 + T3)
OFF during the period. After that, the zero-cross detector energization ON
Return the / OFF unit 7 to ON, and confirm the zero-cross input.

While the power supply ON / OFF section 7 of the zero-cross detecting section is OFF, the CPU 5 does not have a zero-cross input, but the software is programmed to operate as if there is a zero-cross input every cycle T1. . Then, since there are three zero-crossing pulses, there is little deviation in the timing of energizing the AC load. In addition, the operation such as the timer count can be made the same as the state where the zero-cross detection unit is energized ON, and the timer does not shift. An example of the power saving rate of the zero-cross detector will be described below. During the period of four cycles of zero cross = T1 × 4, the power supply to the zero cross detector can be reduced during the period of T2 + T1 × 3 + T3. Commercial power is 50H
In the area of Z, ie, T1 = 10 ms, T2 = 2 m
Assuming that s and T3 = 3 ms, T1 × 4 = 40 ms T1 × 3 + T3-T2 = 10 × 3 + 3-2 = 31 ms 31 ms / 40 ms × 100 = 77.5% The power consumption of the zero-crossing detector 6 can be reduced by 77.5%.

[0013]

According to the present invention, by providing a circuit for intermittently flowing the current flowing through the zero-cross detector,
Power loss at the zero-crossing detector can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a sanitary device having a zero-cross detection unit energization ON / OFF function.

FIG. 2 is an AC input, energizing ON / OF of a zero-cross detection unit.
Time chart showing each voltage waveform of F, zero cross input

[Explanation of symbols]

1 AC input, 2 AC line, 3 DC power supply unit 1 (D
C24V), 4 ... DC power supply 2 (5V DC), 5 ... CP
U, 6: Zero cross detector, 7: Zero cross detector ON
/ OFF unit, 8: timer count unit, 9: AC load drive unit, 10: AC load (hot water heater, etc.), 11: AC load drive unit, 12: AC load (room heating heater, etc.)

Claims (2)

[Claims] 1. A sanitary appliance having a zero-cross detecting unit and a control means including an AC load such as a heater and a motor, wherein the sanitary appliance includes a circuit for intermittently flowing a current flowing through the zero-cross detecting unit. 2. A sanitary appliance having a control device including a zero-cross detecting unit and a timer function using the zero-cross detecting unit as a reference clock, wherein a sanitary device provided with a circuit for intermittently flowing a current flowing through the zero-cross detecting unit.