JPH0336459A - Method and apparatus for controlling of retention of hot water level in automatic bath with hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To always retain set hot water level by so correcting a detected value as to coincide with water level-water flow rate data based on a difference between both the water level of a reference water level setter and a stored water level when the water level of the setter is different from the stored level, and retaining the set level. CONSTITUTION:When an automatic operation switch is closed, a switching valve 12 is closed, a hot water pouring solenoid valve 4 and an additional combustion solenoid valve 6 are opened, hot water (water) is supplied for venting the air in a piping, the valves 4, 6 are then closed, and the valve 12 is opened. Then, water in a circulating additional combustion conduit 5 is discharged into a bathtub, and the water level of a reference water level setter 10 at that time is detected by a pressure sensor 8. The detected value should be H1 if the sensor is not age-changed, but in case of, for example, H1'>H1 in terms of the detected value, it is corrected so that H0 (i.e., a circulation port) is disposed lower by (H1'-H1), and water is poured to the set level while judging the output value from the circulation port to the set water level.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention fills a bathtub with hot water from the appliance body via a circulation reheating conduit, and detects the water level in the bathtub with a pressure sensor. The present invention relates to a method and apparatus for controlling the filling of hot water in an automatic bath apparatus with a water heater, which automatically stops filling hot water when it is detected that the water level of the bathtub has reached a set water level.

[Conventional technology]

A conventional example of the above-mentioned automatic bath equipment with water heater is shown in FIG. 4. This equipment is equipped with a heat exchanger 1 for hot water supply and a heat exchanger 2 for reheating in the main body of the equipment. A branch line having a pouring electromagnetic valve 4 branched from the hot water outlet pipe 3 of the vessel 1 is connected to the W ring reheating line 5, and the circulation reheating line has a reheating solenoid valve 6, a pump 7 and a pressure It has a sensor 8, and when filling the bathtub with hot water, close the reheat solenoid valve 6 and close the hot water pouring solenoid valve 4.
This is done through one side of the circulation reheating pipe.

In other words, conventionally, when the automatic switch is turned on, the solenoid valves 4 and 6 are opened to pour molten metal (
water), then close the solenoid valves 4 and 6, then close the reheating solenoid valve 6 and open the pouring solenoid valve 4. In this state, the pressure sensor 8 detects the water level in the bathtub 9. The hot water is poured to the set water level, and when it is detected that the water level in the bathtub has reached the set water level, the solenoid valves 4 and 6 are closed, and then the hot water pouring solenoid valve 4 is closed and the S reheating solenoid valve 6 is operated. is opened, the pump 7 is driven to perform reheating operation, and when it is detected that the water temperature in the bathtub has reached the set temperature, the pump 7 is stopped and the reheating solenoid valve 6 is closed. This type of automatic bath equipment is automatically operated as described above by a microcomputer control unit (not shown), but the water level is controlled by the P-Q shown in Figure 5 when the equipment is installed. The graph is memorized, and the P-Q graph is compared with the pressure P (actually detected as voltage) corresponding to the bathtub water level detected by the pressure sensor 8 during filling, and the pressure sensor 8 is set. When it detects the pressure that has reached the water level, it automatically stops filling the water.

The above P-Q graph is a graph that uses the height of the bathtub circulation opening as the reference point, taking advantage of the fact that the detected value is constant up to the circulation opening of the bathtub, and as the water level rises above that, the detected value increases. It is.

[Problem to be solved by the invention]

However, the output of a pressure sensor has a characteristic that it changes over time even if it measures the same water level.For example, as shown in FIG.
V when installing equipment.

What is detected as ``VI'' may change to ``vI'' after 6 months. Therefore, even if the same water level is detected.

There is a problem that after 6 months, the output will increase by α and the set water level for the bathtub will deviate.

The present invention improves the problems of the prior art as described above, and provides an automatic bath device with a water heater that can always fill water to a set water level even if the detected value by a pressure sensor changes over time. The present invention aims to provide a control method and device.

[Means to solve the problem]

The change over time of the pressure sensor is only that the detected value for the same water level changes, and there is almost no change in the output with respect to the amount of change in the water level.In other words, in Figure 5, the detected value by the pressure sensor after 6 months is α minutes. At the same time, the position to the bathtub circulation opening has also risen by α.

The present invention controls the filling of hot water by utilizing the characteristics of the pressure sensor as described above over time.

That is, the present invention connects a reference water level setting section equipped with a pressure sensor to the circulation reheating pipe, and determines the water level H of the reference water level setting section when the appliance is installed and the water level based on the position of the bathtub circulation opening. - The data on the amount of water is stored in the microcomputer control unit, and during subsequent operation, the water level in the reference water level setting unit is detected, and when the detected water level H1' is different from the stored water level H, based on the difference between the two. The method is characterized in that the detected value is corrected so as to match the water level-water amount data, and hot water is filled.

In addition, 1 the present invention provides a water storage chamber whose top opens at a position higher than the ring reheating pipe, and an opening/closing mechanism that connects or blocks the inside of the 1iR reheating pipe including the water storage chamber from the atmosphere. It has a valve, and when the on-off valve is closed, the inside of the circulation reheating pipe is shut off from the atmosphere, and the water level in the bathtub is detected by a pressure sensor, and when the on-off valve is opened, 1! The present invention is characterized in that air is introduced into the circulation reheating pipe, water in the circulation reheating pipe is discharged, and the reference water level remaining in the water storage chamber can be detected by a pressure sensor.

[Effect]

As described above, the present invention provides the following advantages when operating the instrument after MIEE:
When the water level in the reference water level setting section is detected and the detected water level H1' is different from the memorized water level H at the time of equipment installation.

Since the detected value is corrected and filled to match the water level-water amount data based on the difference between the two, even if the detected value of the pressure sensor changes over time, hot water can always be filled at the correct water level.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a water system diagram showing the configuration of a device to which the present invention is applied. In Fig. 1, 1 is a heat exchanger for hot water supply, 2 is a heat exchanger for reheating, 3 is a hot water outlet pipe, and 4 is installed in a branch pipe connected from the hot water outlet pipe 3 to a circulation reheating pipe line 5. pouring solenoid valve,
6 is a reheating solenoid valve, and 7 is a pump.

In the present invention, the reference water level setting section 10 is disposed at the highest position of the circulation reheating pipe 5. That is, this reference water level setting unit 10 includes a water storage chamber 11 having an opening 11' at a position higher than the circulation reheating pipe 5 and in which the pressure sensor 8 is disposed, and the circulation reheating pipe 5 including the water storage chamber. The on-off valve 12 (the figure shows an electromagnetic on-off valve) communicates with or shuts off the atmosphere, and as shown in FIG.
2 is closed, the inside of the circulation reheating pipe 5 including the reference water level setting part 10 is shut off from the atmosphere, and when the on-off valve 12 is opened, the atmosphere is introduced into the circulation reheating pipe 5 from the atmosphere communication hole 13. It is configured as follows.

In the hot water filling control according to the present invention, when the appliance is installed, the reference water level H, etc. is stored in the microcomputer control unit as shown in FIG. 2, and during subsequent operation, it is controlled as shown in FIG. 3. .

Next, FIG. 2 will be explained.

When the automatic switch is turned on, the on-off valve 12 is closed, and at the same time the pouring solenoid valve 4 and the reheating solenoid valve 6 are opened to bleed air from the piping.
4. Pour the molten metal (water), and then turn the molten water pouring solenoid valve 4. Close the reheat solenoid valve 6.

In this state, the pipes are filled with water, so
The height H between the bathtub circulation port 9' and the position of the pressure sensor 8 can be detected by the pressure sensor 8, and its output H2
is stored in a microcomputer control unit (not shown).

Next, while the solenoid valves 4 and 6 are kept closed, the on-off valve 12 is opened to introduce atmospheric air into the circulation reheating conduit 5. Then, the water in the pipe is discharged into the bathtub, but since the water in the water storage chamber 11 remains, the reference water level H, at that time is detected by the pressure sensor 8, and the detected value H, is controlled by the microcomputer. The microcomputer control section calculates (1+Hg=Ho) and stores the calculated value H in the microcomputer control section.

Next, the on-off valve 12 is closed, and the pouring solenoid valve 4. Reheating solenoid valve 6
Open and pour 2x hot water (water) to remove air from the piping.
Then, the reheating solenoid valve 6 is closed and the hot water pouring solenoid valve 4 is opened to fill the bathtub 9 with hot water only through the outgoing pipe of the circulation reheating pipeline 5. During this time, the pressure sensor 8 is used to fill the bathtub 9 with hot water. Detect the water level, draw a graph of P (pressure) - Q (water volume), pour the water up to the set water level, and calculate the obtained P - Q
The graph is stored in the microcomputer control unit (this point is the same as before).

Next, the subsequent automatic operation of the instrument will be explained with reference to FIG.

As shown in Figure 3, when the automatic operation switch is turned on,
Close the on-off valve 12 and open the pouring solenoid valve 4 and reheating solenoid valve 6 to pour xjl (water) to remove air from the pipes.
After that, the molten metal pouring solenoid valve 4 and the reheating solenoid valve 6 are closed, and the on-off valve 12 is opened. Then, the water in the circulation reheating pipe 5 is discharged into the bathtub, and the pressure sensor 8 detects the water level in the reference water level setting section 10 at that time. This detected value should be Hl if there is no change in the pressure sensor over time, but if the detected value is, for example, Hl'> Ml, then H,'-H
It is corrected that Ho (that is, the circulation port) is located below by .

That is, the pouring solenoid valve 4, the reheating solenoid valve 6, and the on-off valve 12 are closed, and then, while the on-off valve 12 is closed, the pouring solenoid valve 4 and the reheating solenoid valve 6 are opened to remove air from the piping. The hot water is poured, and then the on-off valve 12 and the reheating solenoid valve 6 are closed, the hot water pouring solenoid valve 4 is opened, and hot water is poured into the bathtub 9 through the outgoing pipe of the circulation reheating pipe 5 to fill the bathtub with hot water. Meanwhile, the water level in the bathtub 9 is monitored by the pressure sensor 8 according to the P-Q graph, and when it is detected that the water level in the bathtub 9 has reached the set water level, the pouring of hot water is stopped. In addition, at that time, if the temperature of the water in the bathtub has not reached the set temperature, the reheating operation is automatically started, as in the conventional case.

〔Effect of the invention〕

As described above, according to the present invention, even when the detected value of the pressure sensor fluctuates due to changes over time, the correct water level in the bathtub can be detected and the bath can be filled with hot water at the set water level.

[Brief explanation of drawings]

Fig. 1 is a water system diagram showing an overview of the automatic bath equipment with water heater to which the present invention is applied, Fig. 2 is a flowchart showing the data storage method at the time of equipment installation, and Fig. 3 is the subsequent automatic operation method. This is a brooch yard. FIG. 4 is a water system diagram showing an example of a conventional automatic bath system with a water heater, and FIG. 5 is an explanatory diagram of changes over time in a pressure sensor. 1... Heat exchanger for hot water supply, 2... Heat exchanger for reheating, 4
...Pouring solenoid valve, 5...Li ring additional firing pipe, 6...
・Reheating solenoid valve, 7...pump, 8...pressure sensor,
9... Bathtub, 10... Reference water level setting section, 11...
Water storage chamber, 11'...opening, 12...on/off valve, 13.
・Atmoki Road Exit.

Claims (1)

[Scope of Claims] 1. Filling the bathtub with hot water from the appliance body via the circulation reheating pipe, and detecting the water level in the bathtub with a pressure sensor to determine when the bathtub water level has reached a set water level. In an automatic bath device with a water heater that automatically stops filling hot water when it is detected, a reference water level setting section equipped with a pressure sensor is connected to the circulation reheating pipe, and the reference water level setting section when installing the equipment is installed. The water level H_1 and data of the bathtub water level (pressure) - water amount with the position of the bathtub circulation opening as a reference point are stored in the microcomputer control unit, and during subsequent operation, the water level of the reference water level setting unit is detected, When the detected water level H_1' is different from the stored water level H_1, the detected value is corrected based on the difference between the two so that it matches the water level-water amount data, and hot water is filled. Method for controlling hot water filling of equipment. 2. Fill the bathtub with hot water from the appliance body via the circulation reheating pipe, and detect the water level in the bathtub with a pressure sensor, and automatically fill the bathtub when it detects that the water level has reached the set water level. In an automatic bath device with a water heater that is configured to stop automatically, a reference water level setting section equipped with a pressure sensor is connected to the circulation reheating pipe, and the reference water level setting section is connected to the circulation reheating pipe from the circulation reheating pipe. It consists of a water storage chamber whose top opens at a high position, and an on-off valve that communicates or shuts off the inside of the circulation reheating pipe, including the water storage chamber, with the atmosphere.When the on-off valve is closed, the inside of the circulation reheating pipe is closed. is isolated from the atmosphere, the water level in the bathtub is detected by the pressure sensor, and when the on-off valve is opened, the atmosphere is introduced into the circulation reheating pipe, the water in the circulation reheating pipe is discharged, and the water in the water storage chamber is An automatic bath device with a water heater, characterized in that a reference water level remaining in the bath can be detected by a pressure sensor.