JPS6118358Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is related to the control of water heaters, and eliminates unnecessary energization by controlling the water heater by controlling the temperature set by a hot water thermistor and by controlling the composite value of the resistance. It is designed to be used efficiently. Normally, in this type of water heater, hot water is supplied by continuously controlling the temperature by utilizing changes in resistance by a thermistor. However, in such cases, the actual usage is generally to mix the tap water with water and use it at a low temperature, and the use that requires high temperature hot water is only for limited times such as bathing. Despite this, it was used in such a way that it was kept at a constant temperature of around 80°C. Therefore, there was a large temperature difference with the outside temperature, which caused the temperature to drop quickly and cause frequent combustion, which was uneconomical. Moreover, setting the temperature to an unnecessarily high temperature is uneconomical, and there would be no inconvenience if a constant temperature could be obtained only when necessary.

This device allows the water heater to be operated economically by using a hot water thermistor to obtain the usual desired temperature range, a resistor that changes the resistance of the hot water thermistor for a certain period of time using a timer to maintain a certain set temperature, and a timer contact.

Hereinafter, an embodiment will be described with reference to the drawings. Reference numeral 1 denotes a water heater, which is formed into a double can structure with an inner can 2 and an outer can 3, and constitutes a water chamber 4. 5 is a buttful, 6 is a burner, and 7 is an exhaust pipe. Reference numeral 8 denotes a control unit which is communicated by a lead wire 9 to a controller unit 11 provided in a room 10 or the like. 12 is a power supply, 13 is an igniter (not shown), 14 is a burner motor, 15 is a similar electromagnetic pump, and these are relay contacts a ₁ , b ₁ as appropriate.
Intermittently controlled by etc. 16 is a burner circuit consisting of the above. 17 is a transformer, 18 is a rectifier circuit, 19 is a hot water control circuit, and temperature setting variable resistor 20
It consists of a hot water thermistor 21 facing into the water chamber 4, switching transistors 22 and 23, and relay coils a. 24 is a control circuit with a switching transistor 25 and a relay coil b
It consists of etc. 26 is a flame detection circuit.
Further, a series circuit consisting of a resistor 27 and a timer contact 28 is connected in parallel to the hot water thermistor 21, and the timer contact 28 is closed only for an arbitrary set time of the timer 29 to close the hot water thermistor 2.
The water temperature is raised to a temperature determined by the combined resistance value by setting the resistance value of 1 as a low resistance value due to the combined resistance value of the resistor 27, and this temperature is maintained for a period of time determined by the timer 29. Furthermore, although a mechanical timer is used as the timer 29, an electrically driven timer may also be used.

This invention is constructed as described above, and includes a burner control circuit that controls the start and stop of the water heater, and a hot water control circuit that has a hot water thermistor that senses the temperature of the hot water in the water heater. A timer contact, which is opened and closed by a timer that is arbitrarily set with a resistor connected in series to the thermistor, is connected in parallel, so when using it, hot water can be heated to the relatively low normal operating temperature of about 40℃ to 45℃. If you need high-temperature water such as when taking a bath, you can set the timer to the required time from indoors, etc. During the timer setting time, the resistance will be determined by the combined resistance value. When the time set by the timer has elapsed, the temperature automatically returns to the temperature set by the hot water thermistor and maintains a relatively low temperature.

In this way, according to this idea, if the temperature is set at around 40 to 45 degrees Celsius, which has a small temperature difference with the outside air, the heat exchange rate will be slow and it will be difficult to create a temperature difference, so it will be possible to turn ON and OFF. It is economical as it does not require repeated use, and it is easy to handle as there is no need to mix it with water more than necessary. Furthermore, the time when high-temperature water is required can be set using a timer, so for example, hot water can be prepared only while bathing, and then automatically switched to a low temperature after bathing, allowing rational use and resulting in economical use. The timer setting is automatically released even after bathing, so you can use it with confidence without worrying about forgetting to operate it and leaving it unattended.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the use of this invention. Figure 2 is an example of an electric circuit. FIG. 3 is an explanatory diagram of the controller section. 16 is a burner control circuit, 19 is a hot water control circuit,
21 is a thermistor for hot water, 27 is a resistor, 28 is a timer contact, and 29 is a timer.

Claims (1)

[Scope of utility model registration request] The hot water control circuit includes a burner control circuit that controls the start and stop of the water heater, and a hot water thermistor that senses the water temperature of the water heater, and a timer contact with a predetermined resistance connected in series to the hot water thermistor. A water heater is connected in parallel to a water heater, and is characterized in that the water temperature is controlled only for a time set by a timer.