JPH02219951A - Hot water feeding controlling method for automatic bath device having hot water feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling the filling of hot water in an automatic bath device with a water heater.

[Conventional technology]

A conventional water heater that fills the bathtub with hot water from the device itself via a circulation reheating pipe, and detects the water level in the bathtub with a pressure sensor and automatically stops filling the bathtub at the set water level. The automatic bath equipment was filled with hot water by the method shown in Figures 5 and 6. In other words, Figure 5 shows flowchart 1-1.
, Fig. 6 shows the configuration of the appliance. When the automatic operation switch is turned on, the tail-end solenoid valve 10 is closed and the hot water pouring solenoid valve 9 is opened, and the hot water heated by the hot water supply heat exchanger 2 is poured into the reverse valve. 6. Vacuum breaker 8. Check valve 7. Hot water pouring solenoid valve 9, pump 11, water flow switch 12. Heat exchanger for rear-end collision
3. The hot water is poured into the bathtub via the outgoing pipe 18 of the circulation reheating pipe, and during that time, the pressure sensor 13 installed in the return pipe 19 of the circulation reheating pipe measures the circulation port pressure containing air in the pipe. is detected, and when the pressure of the circulation port containing the air increases, the pouring solenoid valve 9 is closed and the rear impact solenoid valve IO is opened, and the pump 1
1 to bleed air from the rear-end pipe, and when the air bleed turns on the water switch 12, the pump 11 is turned off, the rear-end solenoid valve 10 closes, and the pressure sensor 13 detects the circulation port water level by static pressure. At the same time, the hot water pouring solenoid valve 9 is opened and hot water is poured into the bathtub via only the outgoing pipe 18 of the circulation reheating pipe, and when the pressure sensor 13 detects that the water level has reached the set level, the hot water pouring solenoid valve 9 is opened. It is designed to close to finish filling the water to the set water level.

As mentioned above, in the conventional technology, the air is removed from the circulation reheating pipe, and the static pressure of the bathtub water level is detected on the return pipe side, and then the outgoing pipe is used to pour hot water. This is to detect the water level in the bathtub.

[Problem to be solved by the invention]

However, as mentioned above, in the conventional technology, in order to bleed air by operating the pump while pouring is stopped,
Air bleeding time is required in addition to the original pouring time,
Furthermore, since the hot water has to be poured only through the outgoing pipe of the circulation pipe, the flow rate of hot water is restricted and hot water can only be filled with a capacity lower than that of the equipment, resulting in a long time for filling hot water. The present invention improves the problems of the prior art as described above, and provides a hot water filling control method that can automatically fill hot water at an accurate water level in a relatively short time. This is what we intend to provide.

[Means to solve the problem]

In order to achieve the above object, the present invention fills the bathtub with hot water from the appliance body via the circulation reheating conduit, and
In an automatic bath system with a water heater that detects the water level in the bathtub using a pressure sensor and automatically stops filling the water at a set water level, a flow control valve is installed in the hot water supply pipe and the instantaneous flow rate of the flow control valve is A means for making the flow constant is provided, and when the automatic operation switch is turned on after the water level is revised in the controller, hot water is poured into the bathtub via the flow rate control valve and the outgoing pipe and return pipe of the circulation reheating pipe, and The flow rate of the poured molten metal is monitored and the flow rate control valve is controlled so that the instantaneous flow rate is constant.

In this way, while keeping the instantaneous flow rate of molten metal constant, the molten metal pouring dynamic pressure is detected by a pressure sensor installed in the circulation reheating pipe or the hot water supply pipe connected to the pipe, and the molten metal pouring dynamic pressure is approximately As the water level in the bathtub rises above the circulation fitting from a certain point, the detected dynamic pressure shifts to the rising direction as a reference point, and from that reference point the pressure sensor detects when the water level has reached the height set in the controller. When detected, pouring of hot water into the bathtub is stopped, and the microcomputer control unit stores data on the dynamic pressure of pouring hot water and the integrated flow rate from the start to the stop of pouring.

It is characterized by controlling the subsequent filling of hot water based on the data.

[Effect]

Since the present invention measures the dynamic pressure of pouring metal, it is not necessary to stop the pouring operation and operate the pump for near-draining as in the conventional method. Since the hot water is poured through the boiler, the hot water can be poured while the equipment is at its maximum capacity, and these factors combine to shorten the time it takes to pour hot water. Furthermore, since the present invention keeps the instantaneous flow rate constant during pouring, the water level for filling the hot water can be maintained at the set water level even though the dynamic pressure of pouring hot water is measured.

〔Example〕

Next, before explaining the hot water filling control method of the present invention, an overview of an automatic bath system with a water heater to which the present invention is applied will be given in the 41st article.
l will be explained.

In Fig. 4, 1 is a device, 2 is a heat exchanger for hot water supply, 3 is a heat exchanger for rear-end collision, and 4 is a flow rate sensor installed in a water supply pipe.
5 is a flow control valve similarly installed in the water supply pipe, 6.7 is a check valve installed in the middle of the pipe branching from the hot water outlet pipe of the water heater and connected to the circulation reheating pipe of the bathtub, and 8 is a check valve Also a vacuum breaker.

9 is the same pouring solenoid valve, 11 is the return pipe 1 of the circulation reheating pipeline.
9 is the pump installed, and 12 is the same flow rate switch.

13 is a pressure sensor, 14 is a water supply temperature detection sensor, 15 is a hot water temperature detection sensor, 16 is a hot water temperature detection sensor, and 17 is a bathtub, and the same parts as in FIG. 6 are given the same symbols. In the device to which the present invention is applied, a flow rate control valve 20 and an instantaneous flow rate sensor 21 are disposed in the middle of the pipeline connecting the hot water outlet pipe of the water heater to the circulation reheating pipeline, and the instantaneous flow rate sensor 21 is used to The instantaneous flow rate in hot water is detected, and when the detected value is other than the set value, the flow control valve 20 is varied in the closing direction or opening direction so that the detected value becomes the set value, and the instantaneous flow rate is controlled to be constant. do.

Although not shown in the figure, the above-mentioned automatic bath device with a water heater is equipped with a microcomputer control section and a controller for the microcomputer control section, and the microcomputer control section has each water temperature detection sensor 14, 15, 16, . It inputs signals from the flow rate sensor 4, pressure sensor 13, water flow switch 12, etc., fills the bathtub with hot water at a set temperature based on instructions from the controller, and automatically stops filling the bathtub when it reaches the set water level. death.

The hot water in the bathtub is circulated and heated as necessary, but since these techniques are well known, detailed explanation thereof will be omitted.

Next, with reference to FIG. 1, description will be given of filling hot water and writing data to the microcomputer control unit when the automatic operation switch is pressed after installing the automatic bath system with a water heater.

When you turn on the automatic operation switch after setting the water level in the controller (setting based on the position of the circulation fitting), it first determines whether the hot water filling data for the bathtub has been input to the microcomputer control unit, and then It was determined that there was no data since the flow control valve 2 was used.
0 and the solenoid valve 9 are closed, and the pump 11 is closed in that state.
to detect whether or not the running water switch 12 is on.

This step is a preliminary step to the hot water filling control according to the present invention, and is a step provided just in case.

When it is detected that the running water switch 12 is turned off, the pump 11 is stopped, the solenoid valve 9 and the flow rate control valve 20 are opened, and the hot water heated by the hot water supply heat exchanger 2 is circulated through the reheating pipe using the water supply pressure. Hot water is poured into the bathtub via an outgoing pipe 18 and a return pipe 19. At that time, the instantaneous flow rate sensor 21 starts measuring.

When hot water is poured into the bathtub in this way, the piping resistance is constant, so the dynamic pressure of pouring water should be constant, but the water supply pressure fluctuates due to the use of other water supplies or fluctuations in the water supply pressure Pouring dynamic pressure changes.

In the present invention, the dynamic pressure of pouring water is detected by the pressure sensor 13 at the same time as the water is poured, and when the water level in the bathtub is below the circulation fitting, only the dynamic pressure of pouring water is detected, so the water level does not reach the circulation fitting until the water level reaches the circulation fitting. Although the water level is constant, when the water level rises above the circulation fitting, the dynamic pressure of the pouring metal and the head pressure based on the water level above the circulation fitting are added to the point that increases, and from that reference point, the desired value is set in the controller. Although hot water is poured up to the water level, as mentioned above, the dynamic pressure of hot water pouring changes due to fluctuations in the water supply pressure, making it impossible to control the water level in the bathtub to the desired water level set in the controller.

Here, the present invention measures the instantaneous flow rate by the instantaneous flow rate sensor 21, and determines whether the value is a preset instantaneous flow rate in the microcomputer control unit,
When the flow rate is higher than that, the flow rate control valve 20 is varied in the closing direction, and when it is lower than that, the flow rate control valve 20 is varied in the open direction.Thus, while pouring hot water into the bathtub at a constant flow rate, the flow rate control valve 20 is varied in the closing direction. When the head pressure is above the circulation fitting, the pressure sensor 13 detects the dynamic pressure P and the integrated flow rate Q obtained by the flow rate sensor 4, which inputs the data to the microcomputer control unit, and the pressure sensor 1
3 has reached the set water level, the flow rate control valve 20 and the electromagnetic valve 9 are closed, and the data input as described above and data obtained by converting the data into static pressure are stored in the microcomputer control unit. Based on this data, subsequent water filling control is performed. After that, the pump 11 is driven to circulate hot water in the bathtub in the circulation pipe, and the rear-end hot water temperature detection sensor 16 detects the hot water temperature, and when it is below the set temperature, the rear-end heat exchanger 3 is activated. After igniting the (-na) and reheating it to the set temperature, stop the pump.

2 and 3 are flowcharts showing the automatic operation from the second time onward. FIG. 2 shows the case where there is no water remaining in the bathtub, and FIG. 3 shows the case where there is water remaining in the bathtub.

As shown in Figure 2, when the automatic operation switch is turned on,
After closing the flow rate control valve 20 and the electromagnetic valve 9 in the same way as described above, the pump 11 is driven, and when it is detected that there is no remaining water, water is filled in the same manner as in FIG. 1.

In addition, if there is water remaining in the bathtub, as shown in FIG. 3, when the water flow switch 12 is turned on and it is detected that there is water remaining in the bathtub at a water level higher than the circulating fitting,
The pump 11 is stopped once and the water level at that time is detected by the pressure sensor 13. If the water level is above the set water level, the process immediately proceeds to the reheating process, and when it is below the set water level, the data is stored in the microcomputer control unit. Based on this, the microcomputer control section calculates the pressure value PA until the set water level is reached, and then, in the same manner as described above, the instantaneous flow rate is kept constant while pouring the amount by the pressure PA.

〔Effect of the invention〕

As described above, according to the present invention, during automatic driving,
In addition to continuously pouring water into the bathtub through the outgoing and return pipes of the circulation reheating pipeline to shorten the time required to fill the bathtub, it is also possible to maintain the correct water level set in the controller even though the dynamic pressure of pouring water is detected. It has the effect of automatically filling the water.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the hot water filling control method according to the present invention when writing data, FIG. 2 is a flowchart showing the hot water filling control method when there is no remaining water in the bathtub after the second time, and FIG. Similarly, FIG. 4 is a flowchart for the case where there is residual water in the bathtub, and is a water system diagram of an automatic bath device with a water heater to which the present invention is applied. FIG. 5 is a flowchart showing a conventional hot water filling control method, and FIG. 6 is a water system diagram of an automatic bath apparatus with a water heater to which the conventional hot water filling control method is applied. 2... Heat exchanger for hot water supply, 3... Heat exchanger for rear-end collision, 4
...Flow rate sensor, 6,7...Check valve, 8...Vacuum breaker-19...Pouring solenoid valve, 11...
Pump, 12...Water switch, 13...Pressure sensor, 14...Water supply temperature detection sensor, 15...Hot water temperature detection sensor, 16...Reheating hot water temperature detection sensor,
17... Bathtub, 18... Outgoing pipe of circulation reheating pipe, 19
... Return pipe, 5, 20 ... Flow rate control valve, 21
・・Instantaneous flow rate sensor Fig. 5

Claims (1)

[Claims] 1. Equipped with a water heater that fills the bathtub with hot water from the appliance body via a circulation reheating pipe, and that detects the water level in the bathtub with a pressure sensor and automatically stops filling the bathtub at the set water level. In an automatic bath system, a flow control valve is disposed in a hot water supply pipe, and a means for making the instantaneous flow rate of the flow control valve constant is provided, and when the automatic operation switch is turned on after setting the water level in the controller, the flow control valve and Molten metal is poured into the bathtub via the outgoing and return pipes of the circulation reheating pipeline, and the flow rate of the poured molten metal is monitored and the flow rate control valve is controlled so that the instantaneous flow rate is constant. While keeping the instantaneous flow rate of hot water constant, the dynamic pressure of hot water pouring is detected by a pressure sensor installed in the circulation reheating pipe or the hot water supply pipe connected to the pipe, and the dynamic pressure of hot water is kept almost constant. As the water level in the bathtub rises above the circulation fitting, the detected dynamic pressure shifts to the rising direction as a reference point, and the pressure sensor detects when the water level has reached the height set in the controller from that reference point. Then, the system stops pouring hot water into the bathtub, stores data on the dynamic pressure and integrated flow rate from the start of pouring to the stop in the microcomputer control section, and controls subsequent filling of hot water based on the data. A hot water filling control method for an automatic bath device with a water heater.