JPS63105355A - Method of detecting boiling of water heater - Google Patents

Abstract

PURPOSE:To make it possible to correctly detect a water boiling temperature even in a capped water heater by inputting a temperature signal sent from a boiling temperature detecting sensor into an input signal detector, converting a boiling point detecting signal into a relay signal into a relay signal to transmit it to a power source. CONSTITUTION:When hot water within a water heater 11 is heated by a heater 15, and is gradually raised in its temperature and is boiled, the boiling temperature becomes constant. The resistance value of a temperature measuring resistor or a thermistor constituting a boiling temperature detecting sensor 14 provided in hot water or water heater 11 or the electromotive force of a thermocouple becomes constant and does not vary. A boiling point where it does not vary, that is, a boiling point is sensed by the boiling point temperature sensor 14. The rising temperature sent from the boiling temperature sensor 14 is hourly sent to an input signal converting interface 16 to convert the same to an electronic-electric circuit of an input signal detector 17. The boiling point is detected by the electronic-electric circuit, and a boiling point detection signal is sent to a relay signal converting interface 18 to convert it to a relay signal. Thereafter, the relay signal is sent to a relay 19, and a power supply 21 to a heater 20 is stopped or the power supply 21 to an alarm device 20 is operated to emit an alarm.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Field of Application The present invention relates to a boil detection method for a pressureless open water heater, particularly a pressureless open water heater for drinking water. Conventional Technology Water heaters, especially water heaters for drinking water, are mainly of the non-pressure open type, but from the viewpoint of hygiene and taste, water heaters (as shown in Figure 4)
The method of boiling drinking water in a water heater by putting a lid (2) on the water heater is often used. Then insert the vent pipe (5) into the gap (4) between the lid (2) and the hot water level (3) in the water heater (1).
), guide the vent pipe (5) into the hot water (3) inside the water heater and lead it out of the water heater, and install a steam temperature detection sensor ( 6), the water heated by the heater (7) installed at the bottom of the water heater (1) is boiled, and the steam filling the gap (4) at the time of boiling is passed through the vent pipe (5). The said lead-out outside (5
) The steam temperature is detected by the steam-m degree detection sensor (6) attached to the steam temperature, and boiling is detected based on the detected steam temperature and the power supply (not shown) of the heater (7) is stopped, or the boiling indicator buzzer ( A power source (not shown) was activated to indicate boiling.

However, in the known boiling detection means, the steam temperature in the gap (4) due to boiling of water and the vent pipe (5)
There is a difference, although there is a slight difference of 1, from the temperature of the steam that passes through the inside and is led out to the outside of the water heater (1). Temperature measurements are not always accurate, and in the case of water heaters without a lid, the gap (4) does not exist, so the steam is dissipated into the atmosphere, making it impossible to measure the steam temperature. There was 1. Also, since some substances have different boiling points depending on the region with different atmospheric pressure (for example, highlands and lowlands), the same steam temperature detection sensor (6) attached to the water heater (1) can vary the boiling time in regions with different atmospheric pressures. In order to prevent this problem, it is necessary to replace the steam temperature detection sensor suitable for detecting the boiling temperature depending on the location where the atmospheric pressure differs, which is extremely complicated.

Problems to be Solved by the Invention The present invention detects the boiling point of the water in the water heater without any steam temperature difference using a boiling temperature detection sensor installed in the water in the water heater. This makes it possible to accurately detect the boiling water temperature not only in water heaters with lids, but also in water heaters without lids.
Moreover, even in regions with different atmospheric pressures, boiling water temperature can be detected using water heaters equipped with the same boiling temperature detection sensor, and there is no need to replace the temperature sensor depending on the region with different atmospheric pressures. There is one method that attempts to provide a boiling detection method.

[Structure of the invention]

Means for Solving the Problems The present invention focuses on the fact that the boiling point of hot water is constant under the same atmospheric pressure (for example, the boiling point at 1 atmosphere is 100°C). Alternatively, there is a device that detects the point at which the thermistor resistance value or the electromotive force of the thermocouple becomes constant and does not change, that is, the boiling point, using an electronic or electrical circuit of a computer such as a microcomputer, and is installed in the water heater. The temperature signal sent from the boiling temperature detection sensor is input to an input signal detection device, the boiling point detection signal detected by the device is converted into a relay signal, and the relay signal is transmitted to a power source. The present invention is characterized by a boiling detection method for a water heater.

An embodiment of the above configuration shown in the drawings will be described as follows.

Figure 4 shows the water heater aυ in the method of the present invention 1
α is a lid, I is hot water, and α is a boiling temperature detection sensor, the tip of which is located in the hot water and water α1 of the water heater all. The boiling temperature detection sensor (14) is connected to the input signal conversion interface α. The input signal conversion interface αG is connected to the input signal detection device αη, that is, the electronic or electric circuit of the microcomputer, computer, etc. Input signal detection device a
η is connected to the relay signal conversion interface α, and the relay signal conversion interface side is connected to the relay (IIJ), and is connected to the power source of the relay a snoring heater or alarm (to). .

In the above embodiment of the present invention, hot water and water from the water heater αυ are supplied to the heater a! As shown in the graph shown in Figure 3, the boiling temperature gradually rises [Pl], and when it boils, the boiling temperature becomes constant (P2), and the boiling temperature of the water in the water heater αυ The resistance value of the temperature measuring resistor or thermistor constituting the detection sensor a4), or the electromotive force of the thermocouple also becomes constant and does not change. The boiling temperature detection sensor (141) detects the point at which the above change has stopped, that is, the boiling point (F).The rising temperature i (PI) sent from the above-mentioned S rising temperature detection sensor α is sent momentarily to the input signal conversion interface aQ, The above interface αe converts it into an input signal, and sends it to the electronic and electric circuits of the input signal detection device η (e.g., microcomputer 1 and other computers), so that the value of the input signal becomes constant and does not change due to the above electronic and electric circuits. The boiling point detection signal is passed through the relay signal conversion interface α and converted into a relay signal, and then sent to the relay r1 and sent to the heater (
), or stop the power supply r2 of the alarm (2)
Activate D to issue an alarm.

After the boiling starts, the boiling time can be set arbitrarily. Furthermore, in combination with the conventional method, a steam temperature detection sensor (5
) can be used as an abnormality detection device.

〔effect〕

In the method of the present invention, as described above, there is no need to measure the steam temperature, but a boiling temperature detection sensor installed in the hot water in the water heater keeps the rise in water temperature constant.
Detecting the temperature that does not rise any further, that is, the boiling point, converting this boiling point into an input signal and inputting it to an input signal detection device, converting the boiling point detection signal detected by the device into a relay signal,
Of course, there is one water heater with a lid, but there is one without a lid, in order to transmit the information to the power supply for stopping the heater or the power supply for the alarm for warning that the water in the water heater has reached the boiling point. It is possible to accurately detect the boiling point of water heaters, and there is no need to replace the sensor with a sensor suitable for the atmospheric pressure in areas with different atmospheric pressures. It has the effect of accurately detecting the temperature of boiling water in any area of atmospheric pressure.

[Brief explanation of the drawing]

Figure 1 is a location diagram of the water heater of the present invention, Figure 2 is a system diagram,
FIG. 3 is a graph showing the rise in water temperature in the water heater, and FIG. M4 is a longitudinal cross-sectional view of a known water heater. αυ... Water boiler, ali... Lid, (11... Hot water,
α - boiling temperature detection sensor, ato heater, α
e...Input signal detection interface, αη...
Input signal detection device, alpha hinoki...interface for relay signal conversion, (11...relay, (1)...heater or alarm device, Qη...power supply for converter or S alarm device.Applicant Hosoyama Heki Co., Ltd.

Claims (1)

[Claims] A temperature signal sent from a boiling temperature detection sensor installed in the water of the water heater is input to an input signal detection device, the boiling point detection signal detected by the device is converted into a relay signal, and the relay signal is A boiling detection method for a water heater, characterized in that the boiling detection method is configured to transmit information to a power source.