JPH01285736A - Control of pouring hot-water into automatic bath boiler equipped with hot-water supplier - Google Patents

Abstract

PURPOSE:To permit air extraction without changing a water level by a method wherein circulating and additional heating operation is continued for a predetermined period of time when the flow of water in a circulating and additional heating pipeline is detected to extract air in the pipeline and detect a water level in a bathtub through a pressure sensor while a predetermined amount of hot-water is poured through the pipeline when the flow of water is not detected to extract air in the pipeline and detect the water level in the bathtub. CONSTITUTION:When water is in a bathtub so that the level thereof arrives at a circulating fitting, the flow of water is detected by a flow water switch 6 and, therefore, circulating and additional heating operation is continued to circulate and heat the hot-water in the bathtub until the temperature of the hot-water arrives at a set temperature. When the temperature of the hot-water has arrives at the set temperature, solenoid valves 7, 8, 9, 10 are closed, a pump 4 is stopped, a pressure corresponding to a water level in the bathtub at that time is detected by a pressure sensor 5, the pressure is compared with a data in a micro-computer control unit and the necessary pouring amount of hot-water is operated. On the other hand, when the flow of water is not detected, the solenoid valves 7, 8, 9, 10 are closed once to stop the pump 4, then, the solenoid valves 7, 8, 9 are opened and the solenoid valve 10 is closed to drive the pump 4 and pour the hot-water heated by a hot-water supplying heat exchanger 2 into the bathtub.

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 bathtub with a water heater that uses gas, oil, or the like as a heat source.

[Conventional technology]

Known methods for setting the bathtub water level for automatic bathtubs with water heaters include a water level switch method and a water flow sensor method.

The advantage of the water level switch method is that no matter what level of water remains in the bathtub, the amount of hot water can be correctly stopped at the required water level, but the water level switch unit must be placed outside the bathtub and separate from the equipment. However, there are problems in that the construction work is expensive and complicated.

On the other hand, with a one-type water sensor, the installation work is simple because the water sensor can be incorporated into the fixture, but the user must check the amount of water remaining in the bathtub and correct the amount counted by the water sensor each time. For example, there is a risk that hot water may overflow from the bathtub or the water level may be lower than the required level, making it extremely inconvenient to use.

In order to improve the problems of the conventional technology, the present inventors and others measured the change in water volume with respect to the water level (pressure) from the empty state of the bathtub until it reached the desired water level when installing the equipment, and collected the data. He proposed a method in which the data stored in the control device is stored in the control device, and when the appliance is operated, the data stored in the control device is used to fill hot water to the desired water level.
-90658).

Further, in claim 2 of the invention, when the user turns on the automatic operation switch after setting the desired boiling temperature in the controller, a certain amount of hot water is supplied into the bathtub and the pressure is increased. After removing air between the sensor and the bathtub, the water level in the bathtub is detected by the pressure sensor, and the detected value is compared with the data stored in the control device to calculate the amount of water up to the desired water level and automatically Inventions have been proposed that perform pouring and automatic shutoff.

[Problem to be solved by the invention]

According to the above-mentioned invention, when the amount of water remaining in the bathtub is small, the hot water is correctly filled to the desired water level regardless of the level, and a pressure sensor is installed in the device to detect the water level. The advantage is that the construction work is done using a hour wheel.

However, in the above invention, in order to correctly detect the output of the pressure sensor, a certain amount of hot water must be poured during automatic operation to connect the bathtub and the appliance, and the air in the piping must be exhausted. Therefore, even if the water level in the bathtub has already reached the desired water level and you only want to raise the bathtub temperature to the set temperature, when you press the automatic operation switch, hot water is poured to remove air and the bathtub is heated. There is a problem that the water level rises higher than the desired water level.

The present invention improves the problems of the prior invention as described above, and provides a method for removing air to satisfy the usage conditions of a pressure sensor.
To provide a method for controlling the filling of hot water in an automatic bath pot with a water heater, which allows air to be removed without changing the water level, rather than by pouring hot water.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention fills hot water into the bathtub via a circulation reheating conduit from the appliance body installed at a location away from the bathtub. , and in an automatic bathtub with a water heater that detects the water level in the bathtub with a pressure sensor disposed in the circulation reheating pipe and automatically stops at the set water level, when the manual operation switch is turned on, First, the circulation reheating operation is performed, and in this state, the presence or absence of flowing water in the circulation reheating pipe is detected. If it is detected that water is flowing, the circulation reheating operation is continued for a predetermined time and the circulation reheating pipe is closed. After removing air from the bathtub, the water level in the bathtub is detected using a pressure sensor, and if it is detected that no water is flowing, a predetermined amount of hot water is poured through the circulation reheating pipe and After the air is removed, the water level in the bathtub is detected by a pressure sensor.

[Effect]

As described above, when the automatic operation switch is turned on, the present invention gives priority to the circulation reheating operation (whether combustion is determined by the detected hot water temperature), and in that state, whether or not there is water flowing in the circulation reheating pipe. If it is detected that there is no running water, a predetermined amount of hot water is supplied as in the prior invention, but if it is detected that there is running water, the circulating reheating operation is continued for a predetermined time and the circulating reheating pipe is Since the water level is detected after air is removed from the bathtub, there is no risk that the water level in the bathtub will rise above the set water level.

According to the present invention, even if you want to set only the water temperature to the set temperature without changing the water level, such as during bathing, you can do so with just the automatic operation switch. In other words, conventionally, a ``reheat switch'' was required for the controller in the bathroom, but this can be made unnecessary.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a flowchart of automatic operation to which the present invention is applied, and the portions within the dashed-dotted line are characteristic parts of the present invention. FIG. 2 is a schematic diagram of an automatic bath pot to which the present invention is applicable.

In FIG. 2, ``■'' is the appliance main body, which houses a hot water supply heat exchanger 2 and a bath heat exchanger 3. The bathtub 13 and the bath heat exchanger 3, which are installed at a distance from the appliance body 1, are connected through an outgoing pipe 12 and a return pipe 11, and a pump 4 is installed in the middle of the return pipe 11. death,
A pressure sensor 5 and a water flow switch 6 are installed in the pipe on the suction side of the pump, and a circulation reheating pipe is constituted by a return pipe 11, a pump 4, a heat exchanger 3, and an outgoing pipe 12. 10 is a solenoid valve disposed in the return pipe 11.

A water supply pipe 16 and a hot water supply pipe 17 are connected to the hot water supply heat exchanger 2, a flow sensor 14 is provided in the middle of the water supply pipe 16 to form a hot water supply pipe, and this hot water supply pipe is further connected to a branch pipe 18. A solenoid valve 7 is installed at the outlet of this branch pipe 18. Hopper 15
The lower part of the boiler is connected to the return pipe 11 of the reheating pipe through the solenoid valve 8, so that water (hot water) can be supplied from the hot water heat exchanger 2 to the reheating pipe. . In addition, 19
is the outgoing pipe 12 and return pipe 11 of the reheating pipe when water (hot water) is supplied.
A bypass pipe is provided to supply hot water to the bathtub from both sides, and a solenoid valve 9 is provided in the middle of the pipe.

In addition, in this type of automatic bath kettle, opening and closing of various electromagnetic valves, driving of a pump, control of a burner, etc. are all automatically controlled by a microcomputer control device.

Next, a hot water filling control method of the present invention using the apparatus having the above-mentioned configuration will be explained with reference to the drawings.

When the automatic operation switch of the controller is turned on, as shown in Fig. 1, it is determined whether or not the reference water level data of the bathtub is input to the microcomputer control unit.If it is input, the solenoid valve 10 is opened and the solenoid valve The valves 7, 8, 9 are closed, the pump 4 is driven to perform the circulation reheating operation, and in this state, the water flow switch 6 detects whether water is flowing in the circulation reheating pipe. Then, when there is a small amount of water in the bathtub (up to the circulation fitting), the water flow switch 6 detects the presence of water, and in that case, the circulation reheating operation continues and the hot water in the bathtub is heated until the set temperature is reached. Circulating heating, when it reaches the set temperature, solenoid valve 7
, 8, 9, and 10 and stop the pump 4. In this state, the pressure sensor 5 detects the pressure corresponding to the water level in the bathtub at that time, and compares the pressure with the data from the microcomputer control section. Calculate the required pouring amount.

On the other hand, when the circulating reheating operation is performed and it is detected that there is no running water, -1! After stopping the pump 4 by closing the solenoid valves 7, 8, 9, and 10, open the solenoid valves 7, 8, and 9, and close the solenoid valve 10. In this state, the pump 4 is driven to generate heat for hot water supply. The hot water heated by exchanger 2 is transferred to hopper 1.
5. A predetermined amount (for example, the amount from the circulation fitting to the set water level) via the solenoid valve 8, the bath heat exchanger 3 (but not heated), the bypass pipe 19, the return pipe 11, and the outgoing pipe 12.
A predetermined amount of hot water is poured into the bathtub using a flow sensor 14.
When detected by -, the solenoid valves 7, 8, 9.10 are first closed and the pump 4 is stopped, and then the solenoid valve 10 is opened and the solenoid valves 7, 8.9 are closed to drive the pump 4. to perform the circulation reheating operation again, and in this state, turn off the water flow switch 6.
The presence or absence of running water is detected, and if there is running water, the amount of poured metal is calculated. Note that if it is detected that there is no running water at this stage, this means that the drain plug of the bathtub is disconnected, so all operations are temporarily stopped.

In this way, in the present invention, during automatic operation, priority is given to the circulating reheating operation to detect the presence or absence of running water at that time, and in the case of running water reheating, the circulating reheating operation is performed without pouring hot water. Since the operation continues and hot water is poured into the bathtub when there is no running water, the air in the circulation pipe can be reliably removed in any case, and the output of the pressure sensor can be detected correctly. Unlike the invention, there is no risk that the water level in the bathtub will rise above the water level set in the controller.

After calculating the required amount of hot water as described above, the calculated amount was poured at the set temperature in the same manner as before, and then the temperature of the water in the bathtub was detected and the set temperature was set. After that, it will automatically stop.

〔Effect of the invention〕

As described above, according to the present invention, hot water can be correctly filled to the desired water level regardless of the level of the remaining water in the bathtub, and unlike the earlier invention, the water level of the bathtub can rise above the set water level. This eliminates the risk of

[Brief explanation of the drawing]

FIG. 1 is a flowchart of automatic operation to which the hot water filling control method according to the present invention is applied, and FIG. 2 is a diagram showing the general configuration of the appliance. 2... Heat exchanger for hot water supply, 3... Heat exchanger for bath, 4
...Pump, 5...Pressure switch, 6...Water switch, ? , 8, 9. 10... Solenoid valve, 11... Circulation return pipe, 12... Circulation outgoing pipe, 13... Bathtub, 14
...Flow sensor, 15...Hopper, 16...
・Water supply pipe, 17... Hot water supply pipe, 18... Branch pipe, 19
...Bypass pipe.

Claims (1)

[Claims] 1. Fill the bathtub with hot water from the appliance body installed at a location away from the bathtub via a circulation reheating pipe, and measure the water level in the bathtub using a pressure sensor installed in the circulation reheating pipe. When an automatic operation switch is turned on in an automatic bathtub equipped with a water heater that detects the water level and automatically stops it at a set water level, it first performs a reheating operation through circulation, and in that state checks whether or not there is water flowing in the reheating pipe. If it is detected that there is running water, the circulating reheating operation continues for a predetermined period of time to remove air from the circulating reheating pipe, and then the pressure sensor detects the water level in the bathtub and detects that there is no running water. In this case, a predetermined amount of hot water is poured through the circulation reheating pipe, air is removed from the circulation reheating pipe, and then the water level in the bathtub is detected by the pressure sensor. A fully automatic bath kettle water filling control method.