JP4500499B2 - Toilet equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a toilet apparatus, and more particularly to a toilet apparatus in which cleaning water is heated by an instantaneous heat exchanger and sprayed locally from a cleaning nozzle.
[0002]
[Prior art]
As a toilet device having a hot water washing means using a conventional instantaneous heat exchanger, water is supplied from the water supply source to the electromagnetic on-off valve through a constant flow valve, and an air release valve that prevents the generation of negative pressure from the electromagnetic on-off valve and extra Water is supplied to the pump through the escape water channel, and the pump supplies the desired flow rate of the wash water to the instantaneous heat exchanger via the flow sensor, and the wash water heated to the desired temperature is switched to the switching valve. In order to supply the nozzle unit having the cleaning nozzle through the nozzle, and to inject the nozzle unit toward the local part, and to supply the nozzle unit with cleaning water having a desired flow rate and temperature, the instantaneous heat exchanger Temperature sensors that detect the temperature of the cleaning water are arranged at the inlet and outlet of the pump, and the control means controls the pump according to the flow rate detected by the flow sensor, and detects the temperature by the temperature sensor at the inlet and outlet. Incoming and outgoing temperatures and detection Was known that so as to control the input to the heater of the instantaneous type heat exchanger by the flow.
[0003]
Also, a water supply means having an electromagnetic on-off valve connected to the water supply source through a constant flow valve, a temperature detection means for detecting the temperature of the inlet and the outlet, and a float switch for detecting the presence or absence of water to prevent empty cooking And an instantaneous heat exchanger with a vacuum breaker to prevent negative pressure generation, a flow control valve, and a nozzle unit, and when seating is detected, the instantaneous heat exchanger is stopped with the water supply means stopped A hot water cleaning device that keeps the water in the instantaneous heat exchanger heated to a predetermined temperature by keeping it energized for a predetermined time, keeping it warm without throwing it away, and allowing the hot water to be supplied to the nozzle unit immediately at the start of use. Is also known (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-204634
[Problems to be solved by the invention]
However, the conventional toilet device has a problem that the temperature sensor is used at the inlet and outlet of the flow rate sensor and the instantaneous heat exchanger, resulting in a high cost.
[0006]
In the toilet apparatus disclosed in Patent Document 1, temperature sensors at the inlet and outlet of the instantaneous heat exchanger and a float switch for detecting the presence or absence of cleaning water are disposed, and there are similar problems.
[0007]
In view of the above-described conventional problems, an object of the present invention is to provide a toilet apparatus capable of desired hot water temperature control with a low-cost configuration that does not use a flow sensor.
[0013]
[Means for Solving the Problems]
Toilet device of the present invention, the electromagnetic shutoff valve connected to a water supply source, the instantaneous type heat exchanger having a heater for heating the wash water heating passage heating passage connected to the electromagnetic shutoff valve When the temperature detecting means disposed in the heating channel or near the outlet of the instantaneous type heat exchanger wherein a cleaning nozzle for local cleaning connected via a water supply control means to the outlet of the instantaneous type heat exchanger a nozzle unit having a nozzle cleaning means or water discard passage, and a control means to control the input of the heater, said control means, upon input detection signal from the seating detection means separately provided, the water supply control switching means to said nozzle cleaning means or the water discard passage opening the electromagnetic shutoff valve, enter a half or less of the rated power input to the heater, after entering the power, of the temperature sensing means When the detection temperature changes Which detects the flow rate based on.
[0014]
According to this configuration, opens the electromagnetic shutoff valve when seated, so as to flow the cleaning water to the nozzle washing means or water discard passage, entering below half the input of the rated input to the heater, the power to the heater Since the time until the detected temperature of the temperature detecting means changes after the input of is approximately proportional to the flow rate, the flow rate can be detected without providing a flow sensor by detecting that time. Control parameters of the water supply control means based on the control value of the water supply control means, and feedforward control of the input to the heater of the instantaneous heat exchanger based on the control value of the water supply control means and the detected incoming water temperature Thus, the temperature of the cleaning water supplied to the cleaning nozzle can be appropriately controlled.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, 1st Embodiment of the toilet apparatus of this invention is described with reference to FIGS.
[0018]
In FIG. 1, a water supply pipe 2 for a hot water cleaning device is branched by an angle valve 1 a from a water supply pipe 1 that supplies water toward a toilet from a water supply source, and water is supplied to a water stop electromagnetic valve 4 via a check valve 3. Instantaneous type with a built-in heater 8 having a rated input of about 1.0 to 1.5 kW through a relief passage 5 provided with a relief valve 6 so as to allow excess flush water to escape from the water stop solenoid valve 4 to the toilet. Water is supplied to the heat exchanger 7, and the outlet of the instantaneous heat exchanger 7 is connected to a buttocks washing nozzle 11 and a bidet washing nozzle 12 via a flow control switching valve 9 having a flow rate adjusting function and a flow path switching mechanism. It is connected to a nozzle unit 10 having a nozzle cleaning passage 12 for cleaning the cleaning nozzles 11 and 12.
[0019]
The flow control switching valve 9 includes a water inlet port 9 a, a butt washing port 9 b connected to the butt washing nozzle 11, a bidet washing port 9 c connected to the bidet washing nozzle 12, and a nozzle washing connected to the nozzle washing passage 13. A port 9d is provided, and the rotational position of a valve body (not shown) is controlled by a motor 9e so that the ports 9b to 9d are switched and the flow rate is adjusted.
[0020]
14 is a toilet bowl, 15 is a toilet seat, and a seating detection means 16 for detecting a state in which a person is seated on the toilet seat 15 is disposed. Further, a temperature detection means 17 for detecting the temperature of the washing water is disposed in the vicinity of the outlet of the instantaneous heat exchanger 7. A control unit 18 is configured to receive detection signals from the seating detection means 16 and the temperature detection means 17 and control the motor 9e of the water stop solenoid valve 4, the heater 8, and the flow control switching valve 9.
[0021]
In the above configuration, when a user sits on the toilet seat 15, as shown in FIG. 2, a seating detection signal is input from the seating detection means 16 to the control unit 18, and the control unit 18 opens the water stop solenoid valve 4 and flows. The adjustment switching valve 9 is switched to the nozzle cleaning port 9d, the cleaning water is allowed to flow into the nozzle cleaning passage 13, and the temperature detected by the temperature detection means 17 is read after a predetermined time, whereby the incoming water temperature can be detected.
[0022]
Next, as shown in FIG. 3, the water stop solenoid valve 4 is opened, the flow control switching valve 9 is switched to the nozzle cleaning port 9d, and the cleaning water is allowed to flow through the nozzle cleaning passage 13 with respect to the heater 8. Even if there is no water in the heating flow path of the instantaneous heat exchanger 7, there is no fear of causing a temperature rise to the extent that it will be damaged. A power of about 100 W to 500 W is input to the 1.5 kW heater 8 for a predetermined time, and a change in temperature detected by the temperature detecting means 17 is detected.
[0023]
Here, when the washing water is flowing, as shown in FIG. 3, when the washing water heated by the heater 8 in the heating flow path of the instantaneous heat exchanger 7 flows to the position of the temperature detection means 17. Therefore, the temperature detected by the temperature detector 17 increases with a time delay D from the input to the heater 8, and when the input to the heater 8 is stopped, the detected temperature decreases rapidly with a time delay. Thus, it is detected that the cleaning water is flowing through the heating flow path of the instantaneous heat exchanger 7, and the flow rate of the cleaning water is calculated from the time delay D.
[0024]
Then, by controlling the input power to the heater 8 based on the detected incoming water temperature and the calculated flow rate, it is possible to feed-forward control the temperature of the cleaning water supplied to the cleaning nozzles 11 and 12 first. The temperature of the cleaning water discharged from 11 and 12 can be appropriately controlled. In addition, by setting the flow control parameter of the flow control switching valve 9 to be changed based on the control value of the flow control switching valve 9 and the calculated flow rate, it is possible to ensure a highly accurate flow setting.
[0025]
On the other hand, when the washing water is not flowing, as shown in FIG. 4, even if electric power is input to the heater 8, heat is not rapidly transmitted to the position of the temperature detecting means 17, and the temperature detecting means 17 Since the detected temperature changes only very slowly, and the temperature continues to rise even after the input to the heater 8 is stopped, it is reliably detected that there is no washing water. As described above, when the cleaning water is not flowing, the instantaneous heat exchanger 7 can be prevented from being cooked by prohibiting the input to the heater 8. And when it detects that there is no washing water, all operation | movement of a warm water washing | cleaning apparatus will be stopped, an alarm will be output and it will notify that it is not supplied.
[0026]
In the above description, as shown in FIG. 3, an example in which power is input only once to the heater 8 has been shown. However, as shown in FIG. May be input multiple times, so that even if the input to the heater 8 is small, the presence or absence of water can be identified as noise and reliably detected, so that the instantaneous heat exchanger 7 can be cooked while suppressing the temperature rise. Can be reliably prevented.
[0027]
(Second Embodiment)
Next, 2nd Embodiment of the toilet apparatus of this invention is described with reference to FIG. 6, FIG. Note that the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only differences are described.
[0028]
In the present embodiment, the first temperature detection means 19 for detecting the temperature of the hot water is provided in the vicinity of the outlet of the instantaneous heat exchanger 7, and in the middle of the heating passage in the instantaneous heat exchanger 7 or in the vicinity of the inlet. The second temperature detection means 20 is provided, and the detection signal is input to the control unit 18.
[0029]
In the above configuration, during the water supply control operation for the nozzle unit, the input power to the heater 8 is changed stepwise by the control unit 18 at appropriate time intervals, as shown in FIG. The temperature detected by the temperature detectors 19 and 20 is monitored, the time delay d of the detected temperature change is obtained, the flow rate of the wash water is calculated from this time delay d, the detected flow rate and the flow rate to the flow control switching valve 9 at that time By comparing with the control value, the control parameter for the flow control switching valve 9 is changed and set.
[0030]
Thus, according to the present embodiment, the control parameter for adjusting the flow rate of the flow control switching valve 9 is automatically changed and set even when the water pressure fluctuation or the like of the water supply source changes even though the flow rate sensor is not provided. By doing so, it is possible to always maintain a desired flow rate with high accuracy.
[0031]
In this embodiment, the flow control switching valve 9 is used as the water supply control means. However, the present invention is similarly applied to an example using a pump that supplies cleaning water toward the nozzle unit 10 and its effect. Can be played.
[0032]
Moreover, in the nozzle unit 10 of the said embodiment, although what wash | cleaned by having the nozzle washing | cleaning channel | path 13 ejected washing water to the front-end | tip part outer surface of the washing nozzles 11 and 12, was illustrated simply It is obvious that the same effect can be obtained by applying the present invention to the toilet bowl 14 having a drainage passage for draining water.
[0035]
【The invention's effect】
According to the toilet device of the present invention, opens the electromagnetic shutoff valve when seated, so as to flow the cleaning water to the nozzle washing means or water discard path, enter the half or less of the rated power input to the heater, the By detecting the flow rate based on the time until the detection temperature of the temperature detection means changes after the input of power, the flow rate can be detected without providing a flow sensor, and the water supply control means based on the detected flow rate By setting the control parameters, the feed water control of the input to the instantaneous heat exchanger heater based on the detected incoming water temperature and the control value of the feed water control means, the temperature of the wash water that is initially fed to the wash nozzle Can be controlled appropriately.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a first embodiment of a toilet apparatus according to the present invention.
FIG. 2 is a timing chart of an incoming water temperature detection operation in the same embodiment.
FIG. 3 is a timing chart of the presence / absence of water and a flow rate detection operation in the same embodiment.
4 is a timing chart similar to FIG. 3 when there is no water in FIG.
FIG. 5 is a timing chart of another flow rate detection operation in the same embodiment.
FIG. 6 is a schematic configuration diagram of a second embodiment of the toilet apparatus of the present invention.
FIG. 7 is a timing chart of the flow rate detection operation in the same embodiment.
[Explanation of symbols]
4 Water stop solenoid valve 7 Instantaneous heat exchanger 8 Heater 9 Flow control switching valve 10 Nozzle unit 11 Butt washing nozzle 12 Bidet washing nozzle 13 Nozzle washing passage 16 Seating detection means 17 Temperature detection means 18 Control section 19 First temperature detection Means 20 Second temperature detection means

Claims (1)

A water stop electromagnetic valve connected to the water supply source, a momentary heat exchanger having a heater for heating the washing water in the water stopping solenoid valves connected to the heating channel heating flow path, the instantaneous type heat exchanger a temperature detecting means which is heated channel or arranged in the vicinity of the outlet of the vessel, the cleaning nozzle and the nozzle cleaning unit or water discard path for local cleaning connected via a water supply control means to the outlet of the instantaneous type heat exchanger and control means which controls the nozzle unit, the input of the heater with the door, said control means, upon input detection signal from the seating detection means separately provided, the water supply control means said nozzle cleaning means or the open the electromagnetic shutoff valve is switched to the water discard passage, the heater enter the half or less of the rated power input, after entering this power, the time until the detection temperature of said temperature detecting means is changed Detect flow rate based on Toilet apparatus according to claim Rukoto.

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