JPH0530167Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic water level adjustment device that automatically adjusts the water level of a bathtub.

(Prior Art) Conventionally, in order to automatically adjust the water level of a bathtub, a first method is to use a water flow sensor, and a second method is to use a water pressure sensor. In the first method,
There is an example in Publication No. 151043. To explain using FIG. 2, 1 is a bathtub with a water heater, and an instantaneous water heater 2 and a bath water circulation heater 3 are arranged side by side inside the bathtub.
The instant water heater 2 consists of a heat exchanger 4 for hot water supply, a burner 5 for heating it, an inlet pipe 6 connected to the city water supply, an outlet pipe 7, etc. The inlet pipe 6 is equipped with a flow rate sensor 8 and an inlet water temperature detection thermistor 9. However, the hot water tap pipe 7 is provided with a hot water temperature detection thermistor 10 and a flow rate controller 11, respectively. On the other hand, the bath water circulation heater 3 includes a circulation heat exchanger 12, a burner 13, a bath water inlet pipe 14, a bath water return pipe 15, a self-priming pump 16 disposed in the return pipe 15, and a self-priming pump 16 disposed in the return pipe 15. A flow rate switch 17, a circulating hot water temperature detection thermistor 18, etc. are provided. The outgoing pipe 14 and the return pipe 15 are combined into one double tube, and their ends are connected to the bathtub 1 in the bathroom.
It is opened in the side wall of 9. 20 is a bath hot water supply pipe that connects the hot water outlet pipe 7 on the downstream side of the flow rate controller 11 and the pump outlet side of the return pipe 15. It has a vacuum breaker valve 23 and a check valve 24. A gas proportional control valve 2 is installed in the gas path to the burner 5 of the water heater 2.
5 is provided, and the set temperature set by the remote control, etc., the water temperature detected by the thermistor 9, and the detected flow rate by the flow rate sensor 8 are processed in the microcomputer, and the combustion amount is determined by adjusting the opening degree of the gas proportional control valve 25. to keep the hot water temperature constant. Furthermore, thermistor 10
is for feeding back the detected hot water temperature, and the flow rate controller 11 is for controlling the flow rate to maximize the heating ability for the set temperature. 26 is a gas electromagnetic valve provided in a gas path to the burner 13, and 27 is an exhaust fan for discharging waste gas from both heaters 2 and 3 to the outside. Furthermore, the bathtub 1 with water heater having such a configuration is installed on the first floor,
The bathtub 19 may be provided not only on the first floor as shown by the solid line in the figure, but also on the second floor as shown by the chain line. In that case, the vacuum breaker valve 23 is raised to a position above the water surface of the second floor bathtub as shown by the chain line. 28 is bathtub 1
This is the remote control installed near 9, and the power switch 2
9, a hot water temperature adjustment knob 30 for hot water supply, a bath reheating switch 31, a bath automatic switch 32, a bath temperature setting knob 33, a hot water amount setting knob 34, etc.

The first method has such a configuration, and in order to automatically boil the bath, turn on the power switch 29 with the remote control 28, and at the same time turn on the bath temperature setting knob 33,
After setting the hot water amount setting knob 34 to a desired temperature and amount, the automatic switch 32 can be pressed. As a result, the solenoid valve 22 opens and water flows, and the water heater 2 side operates due to the detection by the flow rate sensor 8, and the burner 5
ignites and reaches a pre-fixed appropriate temperature (e.g. approximately 38℃)
The hot water flows from the bath water supply pipe 20 to the return pipe 15. At this time, the water flow rate sensor 21 starts measuring the flow rate, and the hot water is sent out both in the direction of the pump 16 of the return pipe 15 and in the direction of the heat exchanger 12.
4, 15 while pushing out the accumulated air inside the bathtub 19.
It flows into the bathtub 19 and gradually accumulates in the bathtub 19.
When the water flow sensor 21 measures the value set in advance with the setting knob 34, the solenoid valve 22 closes and the operation of the water heater 2 stops, and then the pump 16 starts rotating and a forced flow is generated in the circulation path, which increases the flow rate. When the switch 17 detects this, the burner 13 is ignited, and the circulating hot water is boiled until the thermistor 18 detects the preset water temperature, and then stops. During this heating, the bath water is vigorously squirted into the bathtub 19, so that there is no difference in temperature between the top and bottom, and the water boils uniformly.

There is also an example of the second method as disclosed in Japanese Utility Model Application Publication No. 151043/1983. To explain using FIG. 3, 1 is a bathtub with a water heater, and an instantaneous water heater 2 and a bath water circulation heater 3 are arranged side by side inside. The instantaneous water heater 2 includes a hot water exchanger 4, a burner 5 for heating it,
It consists of an inlet pipe 6 and an outlet pipe 7 connected to the city water supply, and the inlet pipe 6 is equipped with a flow rate sensor 8 and an inlet water temperature detection thermistor 9, and the outlet pipe 7 is equipped with an outlet water temperature detection thermistor 10 and a flow rate controller 11, respectively. has been done. On the other hand, the bath water circulation heater 3 includes a circulation heat exchanger 12,
burner 13, bath water going pipe 14, bath water return pipe 15,
A self-priming pump 16 disposed in the return pipe 15, a flow rate switch 17 disposed upstream thereof, a circulating hot water temperature detection thermistor 18, a water pressure sensor 21, etc. are provided. The outgoing pipe 14 and the return pipe 15 are combined into one double tube, and their ends are opened in the side wall of the bathtub 19 in the bathroom. 20 is a bath water supply pipe that connects the hot water supply pipe 7 on the downstream side of the flow rate controller 11 and the pump outlet side of the return pipe 15, and from the hot water supply pipe 7 side there is a solenoid valve 22 for supplying bath hot water, and a vacuum break valve for preventing backflow of sewage. 23, it has a check valve 24. A gas proportional control valve 25 is provided in the gas path to the burner 5 of the water heater 2, and the set temperature set by the remote controller, the water temperature detected by the thermistor 9, and the detected flow rate by the flow rate sensor 8 are calculated and processed in the microcomputer. The opening degree of the gas proportional control valve 25 is adjusted to change the combustion amount and keep the temperature of the hot water constant. The thermistor 10 is for feeding back the detected hot water temperature, and the flow rate controller 11 is for controlling the flow rate to maximize the heating ability for the set temperature. 26 is a gas electromagnetic valve provided in a gas path to the burner 13, and 27 is an exhaust fan for discharging waste gas from both heaters 2 and 3 to the outside. The bathtub 1 with water heater having such a configuration is installed on the first floor, but the bathtub 19 is not installed on the first floor as shown by the solid line in the illustration.
It may be installed on the second floor as shown by the chain line. In that case, the vacuum breaker valve 23 is raised to a position above the water surface of the second floor bathtub as shown by the chain line. 28 is a remote control installed near the bathtub 19, which includes a power switch 29, a hot water temperature adjustment knob 30, and a bath reheating switch 3.
1. It has an automatic bath switch 32, a bath temperature setting knob 33, a bathtub water level setting knob 34, etc.

The second method has such a configuration, and in order to automatically boil the bath, turn on the power switch 29 using the remote control 28, and also turn on the bath temperature setting knob 33,
After setting the desired temperature and water level in advance using the water level setting knob 34, the automatic switch 32 can be pressed. As a result, the solenoid valve 22 opens and water flows, and the flow sensor 8 detects the water heater 2, which operates the water heater 2 and ignites the burner 5.
38° C.) flows from the bath water supply pipe 20 to the return pipe 15. At this time, water pressure measurement by the water pressure sensor 21 is started, and the hot water is sent out separately to both the pump 16 direction of the return pipe 15 and the heat exchanger 12 direction.
The accumulated air in the bathtub 19 is gradually accumulated while being pushed out. and water pressure sensor 21
However, when the water pressure sensor 21 detects the water level set in advance with the bathtub water level setting knob 34 as an output,
The electromagnetic valve 22 closes and the operation of the water heater 2 stops, and then the pump 16 starts rotating and a forced flow is generated in the circulation path. When the flow rate switch 17 detects this, the burner 13 is ignited and the circulating hot water is passed through the thermistor 18. The system will boil the water until it detects the preset temperature and then stop. The water pressure sensor 21 is set by automatically filling the water up to the water level of the bathtub water level setting knob 34 on the remote controller 28 during construction, and then transmitting the detected value of the pressure sensor 21 to the remote controller 2 when the water level setting is completed.
It is stored in a microcomputer (not shown) in 8.

(Problems to be solved by the invention) However, in the conventional automatic water level adjustment device for a bathtub, the first method using a water flow sensor only drops the flow rate set on the remote control. It cannot cope with changes in the water level after hot water is supplied at the start of use, and has the disadvantage that the desired water level cannot be maintained. Further, in the second method using a water pressure sensor, it is necessary to make adjustments during construction to correspond to the set position of the bathtub (eg, different between the first floor and the second floor), which is complicated. That is, the detected value of the water pressure sensor is determined by the position of the water pressure sensor and the position of the water surface of the bathtub. Therefore, the present invention aims to solve the above-mentioned conventional problems and provide an automatic water level adjustment device for a bathtub that can respond to changes in the water level after hot water is supplied at the start of use and does not require adjustment during construction.

(Example) The automatic water level adjustment device for a bathtub of the present invention (hereinafter referred to as the device of the present invention) will be described below according to an example shown in the drawings.

The drawing shows a device according to the invention, which has a circulation path 10 connected to a bathtub 1 and equipped with a reheater 11 and a pump 13.

The circulation path 10 is equipped with a flow rate sensor 16 for detecting the flow rate and a water pressure sensor 18 for detecting the position head L corresponding to the water level 2 of the bathtub 1.

Further, a check valve 14 is installed in the circulation path 10 to create a circulation flow in only one direction.

Next, the terminal end of the hot water supply path 5 is connected to the circulation path 10 at the inlet end of the flow rate sensor 16 .

The starting end of the hot water supply path 5 is connected to a water supply source 4 such as a water supply.

Further, a hot water heater 6 and a water solenoid valve 7 are installed in the hot water supply path 5. A tank may be provided downstream of the water solenoid valve 7 in the hot water supply path 5 to cut off the edge.

Furthermore, a check valve 8 is installed in the hot water supply path 5 to prevent the water in the tub 1 piping etc. from flowing back into the water supply source 4 in the event of a water outage or the like.

Next, a controller 20 is provided which receives signals from the flow rate sensor 16, water pressure sensor 18, and water level setter 21, and outputs signals to the water electromagnetic valve 7.

The operation of the apparatus of the present invention shown in the above embodiments will be explained next.

That is, when the bath signal starts, the user sets the desired water level 2 using the water level setting device 21.

Next, when a start switch (not shown) is closed, the water solenoid valve 7 is opened according to instructions from the controller 20.

As a result, water flows from the water supply source 4 to the hot water supply path 5, and the hot water heater 6 starts operating.

Hot water heated by the hot water heater 6 is supplied to the bathtub 1 through the hot water supply path 5 and the circulation path 10.

The flow rate of hot water flowing into this bathtub 1 is the circulation path 10.
The flow rate is detected by a flow rate sensor 16 attached to the flow rate sensor 16 and inputted to the controller 20.

The controller 20 totals the detected flow rates, and when the total amount reaches the amount of hot water corresponding to the set water level in the water level setting device 21, closes the water electromagnetic valve 7 and stores the detected value of the water pressure sensor 18 at that time.

The hot water supply is thus completed, but subsequent changes in the water level 2 in the bathtub 1 are detected by the water pressure sensor 18.

In other words, when the detected value by the water pressure sensor 18 decreases from the memory value, the controller 2
0 opens the water solenoid valve 7 again.

As a result, hot water is added to the bathtub 1 and the water level 2 rises.

When the water level 2 rises and the value detected by the water pressure sensor 18 reaches the memory value, the water electromagnetic valve 7 is closed.

Next, when reheating the hot water in the bathtub 1, the user closes a reheat switch (not shown), drives the pump 13, and operates the reheat heater 11.

As a result, the hot water in the bathtub 1 circulates through the circulation path 10 and is reheated, increasing its temperature.

(Effects of the invention) The embodiments of the automatic water level adjustment device for a bathtub according to the invention are as described above, and the effects thereof are listed below.

(1) The device of the present invention has the configuration described in the claims for utility model registration, and in particular has a water pressure sensor, so it can respond to changes in the water level after hot water is supplied at the beginning of use.

(2) The device of the present invention has the same configuration as above, and in particular, since it has a flow rate sensor, the amount of hot water to be supplied at the start of use can be ascertained from the flow rate detected by the flow rate sensor, and as a result, as in the case of only a water pressure sensor, No adjustment is required depending on the set position of the bathtub.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. FIGS. 2 and 3 are overall configuration diagrams showing a conventional example. 1...Bathtub, 2...Water level, 4...Water supply source, 5...
...Hot water supply path, 7...Water solenoid valve, 8...Check valve, 10
... Circulation path, 11 ... Reheating heater, 13 ... Pump, 14 ... Check valve, 16 ... Flow rate sensor, 1
8...Water pressure sensor, 20...Controller,
21...Water level setting device.

Claims (1)

[Scope of utility model registration request] A circulation path connected to the bathtub and equipped with a pump, a check valve, a water pressure sensor, a flow rate sensor, and a reheating heater in this order; a hot water supply path for supplying hot water to the bathtub; A hot water heater and a water solenoid valve are arranged in this order, and the ends are connected between the check valve and the water pressure sensor in the circulation path, and the signals from the flow rate sensor, water pressure sensor, and water level setter are inputted to send the signal to the water solenoid valve. It has a flow rate totaling function that detects and totals the flow rate corresponding to the water level set by the water level setting device using a flow rate sensor, and also stores the output value of the water pressure sensor when the flow rate corresponding to the set water level is reached. The controller has a memory function to open the water solenoid valve when the value detected by the water pressure sensor is less than the memory value, and closes the water solenoid valve when the value detected by the water pressure sensor reaches the memory value. Automatic bath water level adjustment device.