JP2603147B2 - Control method of hot water heater in sanitary washing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for controlling a hot water heater in a sanitary washing device according to a water discharge temperature control technique.

[Conventional technology]

In a sanitary washing device having a hot water washing function such as anal washing and bidet washing, a hot water heater for heating and controlling the temperature of hot water in a water storage tank is provided in order to maintain the temperature of hot water to be discharged within a predetermined range. Generally, the hot water heater is controlled to be ON / OFF within a preset temperature range by a temperature sensor.

[Problems to be solved by the invention]

However, in the above-described conventional hot water heater control method,
As shown in the figure, even if the user is sitting on the toilet seat, if the hot water temperature of the hot water tank is higher than the ON point of the hot water heater, power is not supplied, and the temperature decreases until the temperature reaches the ON point due to natural heat radiation. I have. Therefore, if water discharge is started with the temperature lowered, the temperature of the hot water in the tank will drop below the temperature (approximately 35 ° C) suitable for use in a short time (T2), together with the water supply accompanying the water discharge, There was a problem that most of the cleaning was performed with cold water.

The present invention has been made in view of the above problems,
A hot water heater control method in a sanitary washing device is proposed, in which hot water having a preset maximum temperature is always discharged at the start of water discharge, and washing can be performed with hot water at a preferable temperature for a relatively long time even when the temperature drops due to water supply accompanying water discharge. It is intended to do so.

[Means for solving the problem]

In order to achieve the above object, a method for controlling a hot water heater in a sanitary washing device according to the present invention has a gist that a user always starts using hot water for washing hot water from a high temperature within a control temperature range. In a sanitary washing apparatus having a structure in which a hot water heater is incorporated in a hot water tank and heats water supplied along with water discharge from a nozzle, water temperature detection from water temperature detecting means for detecting hot water temperature in the hot water tank Heater ON / O via hysteresis setting means to turn ON / OFF the power of the hot water heater in the temperature range set in advance by the signal
Apply to the FF determination means, control the heater control means, and apply a seating signal from the seating detection means for detecting the user's seat sitting to the heater ON / OFF determination means,
When the seating signal is applied, the heater ON / OFF determination means controls the heater control means to be ON even when the temperature is equal to or higher than the ON operation set temperature of the hysteresis setting means, and energizes when the hot water detection means detects the maximum temperature in the set range. Is switched to OFF control.

[Action]

According to the above configuration, when the user sits on the toilet seat, the hot water heater is switched to the ON state by the seating detection means, and the cleaning hot water operates to be reheated to the maximum temperature in the set range during the stool. It is possible to start using from a high temperature within the control temperature range, and the time required for the temperature to drop below the temperature unsuitable for cleaning use will be extended even with the water supply accompanying the flushing of the flush water after stool, and the proper temperature spouting time Can be extended.

〔Example〕

Hereinafter, an embodiment of a method for controlling a hot water heater in a sanitary washing apparatus according to the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing a control method of a hot water heater. The hot water device has a structure in which a heater is built in a hot water tank and heats water supplied along with water discharged from a nozzle. The temperature of the water is constantly monitored by a temperature sensor provided in the hot water, and the heater is ON / OFF controlled through heater control means.

The water temperature detection signal from the water temperature detection means 1 constituted by a temperature sensor turns on / off the heater when the temperature sensor detects about 37 ° C. and turns on when the temperature sensor detects about 36.2 ° C. via the hysteresis setting means 2. The voltage is applied to the determination means 3 to control the heater control means 5. In addition, the heater
The ON / OFF determining means 3 includes a seating detecting means 4 including a seating sensor provided near the toilet seat for detecting the user's seating.
The heater ON / OFF determining means 3 turns on the heater control means 5 when the seating signal is applied, and turns on the power supply when the water temperature detecting means 1 detects about 37 ° C. Switches to the control that turns off. By this switching, the hot water heater 6 in the hot water tank according to a predetermined program.
Is driven ON / OFF.

The control operation of the hot water heater in the sanitary washing device will be described with reference to a time chart shown in FIG.

The time chart shows an example of the detection temperature of the temperature sensor provided in the hot water tank and ON / OFF control of the hot water heater 6 based on the seating detection signal of the seating detection means 4. 37 ° C) is the hysteresis setting means 2
, The hot water heater OFF value set temperature input to the
(6.2 ° C.) is the hot water heater ON value set temperature, and the range indicated by the arrow A is preset by the hysteresis setting means 2.

In the non-use state, the hysteresis setting means 2
3 shows a temperature control curve in which the hot water heater 6 repeats ON / OFF in accordance with the set value, and forms an overshoot (arrow B) when the hot water heater 6 is ON and an undershoot (arrow C) when OFF. Here, when the user sits on the toilet seat and the seating detecting means 4 is turned on, the temperature control curve is changed to the hysteresis setting means 2.
Heater ON / OFF even if it is larger than the ON set value (L) of
The heater control means 5 is turned on via the determination means 3. That is, the moment the user sits, the hot water heater 6 is turned on to heat the water in the tank. Next, when the water temperature in the tank reaches the OFF set value (H) of the hysteresis setting means 2, the process returns to the initial control system, and the hot water heater 6 is turned off via the heater control means 5 in the control range A of the hysteresis setting means 2. .

Therefore, according to the control method of the hot water heater in the sanitary washing device of the present invention, when the user sits on the toilet seat, the hot water heater 6 is turned on, and the water in the hot water tank is heated.
As shown in FIG. 3, the temperature of the hot water in use is changed, and the hot water in the tank is in a reheated state after the seating time T3 and before the water is discharged. The time T4 during which the temperature of the hot water in the tank is maintained at a temperature suitable for washing (about 35 ° C.) becomes longer than T2, and the appropriate temperature water discharge time is extended. In addition, by using a warm water tank with high heat retention, within the above time T3 from seating to use start water spouting,
The maximum temperature can be reached in a short time.

The hysteresis setting means 2 allows the user to change the ON / OFF temperature of the heater and arbitrarily set the water discharge temperature.

〔The invention's effect〕

Since the method for controlling the hot water heater in the sanitary washing device according to the present invention is configured as described above, the user can always start using the washing hot water from a high temperature within the control temperature range, so that the appropriate temperature water discharge time is reduced. It has a feature that can be extended, and the effect after the present invention is implemented is extremely large.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration for realizing a method of controlling a hot water heater in a sanitary washing device according to the present invention, FIG. 2 is a time chart showing a hot water control method of the device, and FIG. FIG. 4 is an explanatory diagram showing a temperature drop of hot water, and FIG. 4 is an explanatory diagram showing a temperature drop of hot water during use by a conventional device. DESCRIPTION OF SYMBOLS 1 ... Water temperature detection means 2 ... Hysteresis setting means 3 ... Heater ON / OFF determination means 4 ... Seating detection means 5 ... Heater control means 6 ... Hot water heater

Claims (1)

(57) [Claims] 1. A sanitary washing device having a structure in which a hot water heater is built in a hot water tank and heats water supplied along with water discharge from a nozzle, wherein the water temperature detecting means for detecting the temperature of the hot water in the hot water tank. Applying to the heater ON / OFF determination means via the hysteresis setting means for turning ON / OFF the power supply of the hot water heater in the temperature range set in advance by the water temperature detection signal, and controlling the heater control means, the heater ON / OFF determination To the means, a seating signal from seating detection means for detecting the user's seat seating is applied, and when the seating signal is applied, the heater ON / OFF determination means is at or above the ON operation set temperature of the hysteresis setting means. The heater control means is also turned on, and when the hot water detection means detects the maximum temperature in the set range, the energization is switched to OFF control. Your way.