JP2532514Y2 - Electric water heater with water heater - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention can be used as a short-time simple heater using an open-type hot water storage type electric water heater.

[0002]

2. Description of the Related Art An open type hot water storage type electric water heater supplies water from a water supply pipe with a float valve so that the hot water tank always keeps a constant water level, and a heater and a thermistor for controlling the heater are provided in the hot water tank. Electric hot water that raises the water temperature in the tank to a certain high temperature, takes out high-temperature water through a tapping pipe that opens into the water near the water surface, and uses the hot water to supply water from a water supply pipe with a float valve as the hot water is taken out. Vessels are known.

[0003]

[Problems to be Solved by the Invention] The place where this type of electric water heater is installed is a washroom or a kitchen, which is not a place where people are always present. Therefore, when working in the kitchen for a relatively long time in the cold season, a portable stove is used,
It is troublesome to bring a portable stove at a short working time, and it is also dangerous to bring a stove into a narrow place, and there is a problem in heating in such a place.

[0004]

According to the present invention, simple heating is performed using an electric water heater provided, and a water supply pipe 2 with a float valve for supplying water to the bottom of a hot water storage tank 1 and a water supply pipe near a water surface of the hot water storage tank 1 are provided. It has a tapping pipe 3 that opens, a heater 4 that is energized and controlled by a thermistor 7, and a radiator fin 5 attached to the outer surface of the hot water storage tank 1, and a fan 6 that blows air toward the radiator fin 5. In the water heater, the radiating fins 5 are attached to the bottom of the hot water storage tank 1 remote from the opening of the tapping pipe 3, and the indoor air sucked by the fan 6 converts the heat of the hot water stored in the bottom of the hot water storage tank 1 into hot air. As an electric water heater with a hot air blower taken out of the electric water heater.

[0005] If the heater 4 is energized when the fan 6 is energized, warm air can be effectively taken out.

[0006]

The operation of the electric water heater with a hot air blower according to the present invention will be described. When water is supplied into the hot water storage tank 1 by the water supply pipe 2 with the float valve, the water is first sent to the bottom of the hot water storage tank 1, When the water level rises, the water supply pipe with float valve 2 detects the water level with the float and stops the water supply.
When the heater 4 attached to the hot water storage tank 1 is energized, the water in the hot water storage tank 1 is heated, the temperature is controlled by the thermistor 7, and the water is heated to a constant high temperature water. .

In the hot water storage tank 1, hot water near the water surface of the hot water storage tank 1 heated by the heater 4 and heated to a high temperature is taken out from the tip of the hot water supply pipe 3, and a water supply pipe 2 with a float valve is used instead of the hot water taken out. Water is supplied to the bottom of the hot water storage tank 1 to maintain a constant water level. When the thermistor 7 detects a decrease in the water temperature at the bottom of the hot water storage tank 1, the heater 4 is energized to supply water supplied to the bottom of the hot water storage tank 1. Heat to a predetermined temperature.

On the other hand, the radiating fin 5 of the present invention is a hot water tank 1
Since the heat of the high-temperature water stored at the bottom of the hot water storage tank 1 is transmitted to the radiation fins 5,
When the fan 6 is operated, the indoor air takes the heat of the hot water at the bottom of the hot water storage tank 1 from the radiating fins 5, converts it into hot air and discharges it out of the electric water heater to be used for heating. However, since the temperature of the hot water does not decrease near the water surface of the hot water storage tank 1, high-temperature water that is the same as normal even when hot water is supplied simultaneously with heating can be stably supplied. The hot water at the bottom of the hot water storage tank 1 is radiated from the radiating fins 5 and supplied with low-temperature water to lower the hot water temperature. The thermistor 7 detects this and energizes the heater 4 to boil the hot water. The heating capacity does not drop significantly. In addition, if the heater 4 is energized at the same time as the fan 6 is energized, the heater 4 is energized before the thermistor 7 detects a decrease in temperature. Even if the heat is radiated from the heater, the heating is immediately performed by the heater 4 so that the heating capacity immediately after the start of the heating does not decrease.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below.
FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention, and FIG.
In the -A sectional view, the same and corresponding members will be described with the same reference numerals.

[0010] 1 is a hot water tank installed in the electric water heater,
Reference numeral 2 denotes a water supply pipe with a float valve for supplying water in accordance with a decrease in the water level in the hot water storage tank 1, and 3 is a tapping pipe having an opening in the water near the water surface of the hot water storage tank 1 so that high-temperature water staying near the water surface can be taken out. It has become.

Reference numeral 4 denotes a heater for heating water in the hot water tank 1.
When the water in the hot water storage tank 1 is heated by the heater 4, an upward convection occurs and the hot water is turned into high-temperature water from above, and finally the entire hot water storage tank 1 is filled with the high-temperature water. Reference numeral 7 denotes a thermistor for detecting the temperature of water in the hot water storage tank 1 and controlling the temperature.
A signal to be flipped is issued.

Numeral 5 is a radiating fin provided outside the bottom of the hot water storage tank 1. When the temperature inside the hot water storage tank 1 becomes high, the surface temperature of the bottom surface of the hot water storage tank 1 also becomes high. It dissipates heat. Reference numeral 6 denotes a fan provided in the vicinity of the radiating fins 5, and 8 denotes a hot-air outlet for discharging hot air from the electric water heater. When the fan 6 is rotated, the indoor air draws heat from the radiating fins 5 of the hot water storage tank 1. The air is taken out and changed to hot air, and the hot air is discharged from the hot air outlet 8 to the outside of the electric water heater for heating.
At this time, since the hot water cooled by the room air is the hot water at the bottom of the hot water storage tank 1, a cooled low-temperature layer is formed at the bottom of the hot water storage tank 1, and this low-temperature water is stirred by convection with the high-temperature water at the upper part. It can supply stable high-temperature water as usual even during heating. Further, if the temperature of the hot water at the bottom of the hot water storage tank 1 decreases, the thermistor 7 detects this and energizes the heater 4, so that heating can be maintained depending on the capacity of the heater 4, and stored in the oil storage tank 1. If the heating is performed for a short time in combination with the heat energy of the warm water, it can be continuously used.

Reference numeral 9 denotes a temperature control knob for arbitrarily setting the temperature of the hot water in the hot water storage tank 1. Reference numeral 10 denotes a switch provided on the outer surface of the electric water heater for turning on and off the fan 6. When the switch 10 is turned on, the heater 4 is energized regardless of the signal of the thermostat 7.

Reference numeral 11 denotes a water supply guide pipe for guiding water from the water supply pipe 2 with a float valve to the bottom of the hot water storage tank 1. Reference numeral 12 denotes safety outside the electric water heater when water supply does not stop due to a trouble in the water supply pipe 2 with a float valve. An overflow pipe for allowing water to flow out to a suitable location, the upper end 12a opens into the air slightly above the set water level of the hot water storage tank 1, and the lower end 12b protrudes out of the electric water heater, and a drain pipe not shown Can be connected to The water supply pipe 2 with a float valve is connected to a water supply pipe, the amount of water injected is controlled by the float valve, and the water level in the hot water storage tank 1 is kept constant. On the other hand, the tapping pipe 3 is connected to a hot water supply tap (not shown), and hot water is used by the tap.

Further, since the heat radiation fins 5 are provided on the bottom outer surface of the hot water storage tank 1, the heat radiation of the heat radiation fins 5 cools the hot water on the bottom surface of the hot water storage tank 1 to form a low temperature layer. However, when the heating is not required in summer, the fan 6 does not rotate even if the radiating fins 5 are provided. Therefore, only the hot water near the bottom of the hot water storage tank 1 is cooled, the low-temperature layer is thin, and the high-temperature area at the upper portion is maintained. So there is no need to worry about heat loss. Further, when the indoor air intake is located below the radiating fins 5, the heat radiation is further reduced. On the other hand, at the time of heating for rotating the fan 6, the thermistor 7 operates to energize the heater 4 by encouraging the heat radiation to spread the low-temperature layer and by supplying hot water and supplying low-temperature water. Heating can be continued, but by this time the warm air temperature may drop. In this invention, since the heater 4 is energized simultaneously with the fan 6,
Since heating of the heater is started before a large low-temperature layer is formed in the hot-water storage tank 1, there is no drop in hot-air temperature at the start of the heating operation, and stable hot-air heating is performed while maintaining a high-temperature portion on the water surface of the hot-water storage layer 1. Was maintained.

[0016]

[Effects of the Invention] The invention has the above-described configuration and operation, and has a function similar to that of a conventional device which is installed in a washroom or a kitchen and used as an electric water heater. On the other hand, when the fan 6 is activated when it is desired to heat the heater temporarily when it is cold, the heat is taken from the radiating fins 5 and turned into hot air, and the hot air is blown out of the electric water heater to be used for heating. It is possible to heat the vicinity of the electric water heater without having to bring in the water heater, and it is convenient for two units.

Further, since the radiating fins 5 are provided on the bottom surface of the hot water storage layer 1, when cooled by room air, only a low temperature layer can be formed at the bottom of the hot water storage layer 1, and there is no influence on the upper high temperature portion, and the heat radiation fins 5 are stable. It can supply hot water of high temperature. Further, the low-temperature layer of the hot water storage layer 1 formed by heat radiation is substantially the same as the low-temperature layer formed by water supply when hot water is used,
If the thermistor 7 detects cold water, the heater 4 is energized and heating can be continued. However, it is impossible to avoid the temperature drop before the heater 4 is energized, but the fan 6
If the heater 4 is also configured to be energized during operation, when the fan 6 starts radiating heat, the heater 4 immediately heats the hot water in the hot water storage tank 1. It can be used for continuous heating or hot water supply.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply pipe with float valve 3 Hot water supply pipe 4 Heater 5 Radiation fin 6 Fan 7 Thermistor

Claims (2)

(57) [Scope of request for utility model registration] 1. A water supply pipe 2 with a float valve for supplying water to the bottom of a hot water storage tank 1 and a tapping pipe 3 opening near the water surface of the hot water storage tank 1.
And a heater 4 energized by a thermistor 7.
In addition, a radiating fin 5 is attached to the outer surface of the hot water storage tank 1, and a fan 6 that blows air toward the radiating fin 5 is provided. In the electric water heater, the radiating fin 5 is separated from the opening of the tapping pipe 3. An electric water heater equipped with a hot air heater, wherein the indoor air sucked by the fan 6 is taken out of the electric water heater as hot air by using the heat of the hot water stored in the bottom of the hot water storage tank 1. 2. The electric water heater with a hot air blower according to claim 1, wherein when the fan 6 is energized, the heater 4 is also energized.