JPS60186644A - Automatic bath heater - Google Patents

Abstract

PURPOSE:To enable to keep the temperature of hot water in a bathtub constant at all times by a method wherein the passage of water to be fed in the bathtub is opened and closed and a burner is controlled based upon the temperature of the hot water and a circulating pump is put into intermittent operation after the set hot water temperature is reached. CONSTITUTION:A control part 10 incorporates an electronic circuit, which controls a burner 1 and a solenoid valve 8 based upon hot water temperatures detected by two hot water temperature detectors 6 and 11, and an electronic circuit, which intermittently operates a circulating pump 5 after the set hot water temperature is reached. Water supplied in a bathtub is automatically heated up to the set temperature. When the set hot water temperature is reached, the combustion of the burner 1 is stopped and the circulating pump 5 continues its intermittent operation at a certain fixed time intervals. When the temperature detected by the hot water temperature detector 6 lowers below the set hot water temperature, water is fed by opening the solenoid valve 8 while operating the circulating pump 5 continuously. When the hot water temperature reaches the set hot water temperature, the solenoid valve 8 is closed and feed water is stopped. Further, the hot water temperature in the bathtub can be kept constant by controlling the burner 1 or the solenoid valve 8 based upon the values of hot water temperature detected by the two hot water temperature detectors 6 and 11.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic bath pot that automatically (1) supplies water into a bathtub and raises the water temperature to a set temperature; This relates to an automatic bathtub that is designed to maintain the temperature of the bathtub.

[Prior art]

An example of a known automatic bathtub of this type is one shown in FIG. 1, in which two baths are automatically supplied and the temperature is raised to a set temperature using a burner. This is a remote control device (-) that allows you to set the desired water temperature and automatically boil the water in the bathtub. A combustion detector and a spark plug are installed on the upper side of the burner 1 (2 is a heat exchanger installed in the
Reference numeral 5 denotes a circulation pump attached to the water channel of the heat exchanger 4, and a hot water intake pipe on the suction side (numbered in two, ℃); 6 is a hot water temperature detector installed in the hot water intake pipe; 7 8 is a water level switch attached to two hot water pipes C on the discharge side of the heat exchanger 4, and is used to set the amount of hot water to fill the bathtub. Solenoid valve as a means,
Reference numeral 9 represents a control unit incorporating an electronic circuit for controlling each of the above-mentioned components, and reference numeral 10 represents a remote control device that remotely performs hot water temperature setting, operation, stop, etc.

In the automatic bathtub constructed as described above, when a desired water temperature is set using the remote control device 10 and operation is started, the solenoid valve 8 is first opened and water is supplied into the bathtub. When the water level reaches a predetermined level, the water level switch 7
is activated, the solenoid valve 8 is closed, and the water supply is stopped. At the same time, the burner 1 starts combustion by the spark plug 3, and when the combustion detector 2 detects that combustion is occurring, the burner 1 continues combustion.5 Meanwhile, the water stored in the bathtub
It is forcibly circulated by the circulation pump 5, heated by the combustion heat of the burner 1 while passing through the water channel of the heat exchanger 4, and returned to the bathtub. When the hot water temperature detected by the hot water temperature sensor 6 (2) reaches the preset hot water temperature with the remote control device 10, the burner 1 stops combustion and the circulation pump 5 also stops operating at the same time. , Two baths are supplied fully automatically, and operation is stopped when the set temperature is reached.

However, in the conventional automatic bath pot as described above, when the hot water temperature setting value detected by the hot water temperature detector 6 is reached, the combustion of the burner 1 and the operation of the circulation pump 5 are stopped. Is the hot water in the bathtub set at the time the operation is stopped? = W, but when actually taking a bath (if 2 hours have passed), the hot water temperature has dropped. In other words, the hot water temperature detector 6 is set at the set temperature. Even if the hot water temperature IW in the bathtub is detected, the temperature IW of the hot water in the bathtub may drop, and there is a drawback that it is not always possible to maintain a constant temperature Ef.Also, if the hot water temperature is set too high and the set value is When changing the temperature, there was a drawback that the desired temperature could not be obtained unless the water was supplied on an appropriate day.

[Summary of the invention]

This invention was made for the purpose of improving the drawbacks of the conventional ones as described above, and includes providing hot water temperature detectors on the suction side of the waterway of the heat exchanger and in the bathtub, and detecting water temperature based on the respective detected hot water temperatures. to control the opening/closing means and burner of the water passage supplied into the bathtub, and to operate the ring pump intermittently when the set water temperature has been reached (Secondly, the temperature of the hot water in the bathtub can always be kept constant) Our aim is to provide the best automatic bath pots.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to two drawings.

t [The same reference numerals are given to the same or equivalent parts as in the prior art, and the duplicate explanation will be omitted.

FIG. 2 is a diagram showing the configuration of an automatic bath pot according to the second aspect of the present invention, and 11 is a water temperature detector provided in the bathtub, which is placed on the side opposite to the side where the heat exchanger 4 is installed. The control unit 10 is
an electronic circuit that controls the burner 1 and the solenoid valve 8 based on the hot water temperature detected by the two hot water temperature detectors 6 and 11;
It has a built-in electronic circuit that causes the circulation pump 5 to operate intermittently after reaching the set water temperature.

The automatic bathtub constructed as described above automatically heats the water supplied into the bathtub and raises it to a set temperature, similar to the conventional example described above. When the set water temperature is reached,
Although combustion in the burner 1 is stopped, the circulation pump 5 continues to operate intermittently at fixed time intervals. During this time, if the hot water temperature becomes lower than a value previously set by the remote control device 10, the burner 1 is fired again and the circulation pump 5 is continuously operated to raise the hot water temperature. In this way, by intermittent operation of the circulation pump 5 even after the bath has boiled, the average temperature of the hot water in the bathtub can be accurately detected.
The water temperature can always be kept constant (2).Also, if you change the set water temperature after the water has boiled, the temperature detected by the water temperature detector 6 may become lower than the set water temperature. The solenoid valve 8 is operated while the circulation pump 5 is continuously operated.
Open to supply water. When the hot water temperature reaches the set temperature, the solenoid valve 8 is closed to stop water supply. At this time, at the initial stage of water supply, a temperature distribution occurs inside the bathtub, and there is a considerable difference between the temperature detected by the hot water temperature detector 6 and the average temperature inside the bathtub. A hot water temperature detector 11 is provided, and the two hot water temperature detectors 6 and 11 detect the hot water temperature respectively, and the burner 1 or the solenoid valve 8 is controlled based on the detected value. .11 detected temperature difference is a constant value]; can be controlled to keep the water temperature in the bathtub 1 constant according to the detected temperature at that time.

Although the hot water temperature detector 11 is placed on the opposite side of the bathtub to the side where the heat exchanger 4 is installed, the water supply 11 to the bathtub and the like can be easily controlled. It is also possible to place the player in other appropriate places.

[Effects of the invention] As explained above, according to the invention, water temperature detectors are provided on the suction side of the waterway of the heat exchanger and in the bathtub, and the detected water temperatures (two↓ 1. In the tub The temperature can be detected, and even after boiling, it can be heated or supplied as needed, which has the effect of keeping the hot water in the double AT constant at the desired temperature. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional automatic bath kettle, and FIG. 2 is a block diagram showing an automatic bath kettle according to the present invention. 1...Burner 4...Heat exchanger 5...Circulation pump 6.11...Hot water temperature Detector 8...
. . . Solenoid valve 9 . . . 1 lilj control part Note that the numbers in the middle of the figure indicate the same or equivalent parts. Agent Masuo Oiwa

Claims (2)

[Claims] (1) Equipped with a heat exchanger installed above the burner (two devices), a circulation pump attached to the water channel of the heat exchanger, and a means for opening and closing the water passageway that supplies water into the bathtub. In an automatic bath kettle that supplies water and heats it to a set water temperature, a water temperature detector is provided on the suction side of the water channel of the heat exchanger and in the bathtub, and the opening/closing is performed based on the detected water temperature. This automatic bath pot is patented as having a means for controlling a burner and a means for intermittent operation of a circulation pump after reaching a set water temperature. (2) Claim 1, characterized in that the hot water temperature detector provided in the bathtub is placed on the side opposite to the side where the heat exchanger is installed.
Automatic bath pot as described in section.