JPS59138851A - Electric water heater - Google Patents

Abstract

PURPOSE:To reduce the capacity of power receiving equipment and to make a daytime power supply which is suitable for the condition of use of hot water and which is more effective by a method wherein a power supply time for a daytime power heater is set so that a supply of electricity in a time zone in which the amount of electricity being used reaches its peak is prevented. CONSTITUTION:A midnight power heater 4 is connected to a power source through a thermostat 6 as a midnight power temperature adjusting means and a power supply time limiting time switch 8 and midnight power heaters 5 and 5' are connected to another power source through thermostats 7 and 7' as daytime power temperature adjusting means and a time switch 9 as a daytime power supply time limiting means. Accordingly, by setting the daytime power time switch 9 at a time outside the time zone (for example, the midnight power supply time zone, and 1,600-1,800) in which the amount of electricity being used reaches its peak is possible to prevent the amount of electricity used from becoming maximum and the additional provision of any power receiving equipment can be dispensed with. Further, there will be no possibility that the daytime power heaters 5 and 5' are left unoperated or operated so that the daytime power is hardly used carelessly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water storage type electric water heater that utilizes nighttime power and daytime power.

Conventional Structure and Problems Conventionally, this type of electric water heater has a structure as shown in FIGS. 1 and 2. That is, a late-night power heater 4 is installed at the bottom of a hot water storage tank 1 connected to a water supply pipe 2 at the bottom and a hot water outlet pipe 3 at the top, and a daytime power heater 5 is installed at the bottom or top of the hot water storage tank 1. The late-night power heater 4 was connected to a power source via a time switch 8 for limiting the energization time and a thermostat 6, and the daytime power heater 6 was connected to a power source via a thermostat 7.7'. In such a configuration, since the daytime power heater 5 is energized whenever the daytime power thermostat 7 is turned on, the daytime power heater 5 is energized at 1 p.m. when the late night power starts to be supplied.
Power may be turned on after 1 o'clock, resulting in peak power consumption. For this reason, in apartment complexes, etc., it was necessary to increase the size of power receiving equipment to accommodate the peak power supply.

In addition, daytime power, which is more expensive than late-night power, is always on, which is economically disadvantageous.

For this reason, it is possible to install a manual switch and use the power heater during the day as desired, but it is extremely troublesome and cannot be operated on a daily basis. there were.

Purpose of the Invention The present invention solves such conventional problems, and by setting the energization time of the heater for daytime electricity, it prevents energization during peak electricity consumption hours and reduces the capacity of the power receiving equipment. In order to achieve this object, it is an object of the present invention to provide an energy-saving and highly economical electric water heater by more effectively supplying daytime power in accordance with hot water supply usage conditions. , the present invention provides heaters for daytime power at the bottom and top of the hot water storage tank, in addition to a heater for late-night power provided at the bottom of the hot water storage tank, and each heater is connected to the power supply via a temperature control means and a time energization control means. The configuration is such that it connects to the With this configuration, it is possible to apply electricity outside the peak hours of electricity usage and to apply electricity effectively according to the hot water supply usage status.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In Fig. 3, a hot water storage tank 1 has a water supply pipe 2 connected to the lower part and a hot water outlet pipe 3 connected to the upper part, and a late-night power heater 4 and a lower daytime power heater 5 are installed in the lower part, and an upper daytime power heater d is installed in the upper part. Set up The late-night power heater 4 connects the daytime power heater 5 and σ to the power source via a thermostat 6 as a temperature control means for late-night power and a time switch 8 for limiting the energization time.
The thermostat γ is used as a temperature control means for daytime electricity.
and 1, and a time switch 9 serving as a time energization control means for daytime power.

In the above configuration, by setting the time switch 9 for daytime power outside of the peak hours of electricity usage (for example, late-night power supply hours, 4:00 to 6:00 in the evening), the amount of electricity used can be reduced. Peaks can be prevented and there is no need to increase the capacity of the power receiving equipment.
No more forgetting to turn on or off, and no more wasted electricity during the day.

Furthermore, by setting the time switch 9 in accordance with the actual situation of hot water supply usage, it is possible to carry out effective daytime power supply with less remaining hot water, resulting in energy saving and economical operation.

In this case, the time switch 9 controls the upper daytime power heater and the lower power heater as one unit, but the same effect can be obtained even if they are separated.

Next, another embodiment of the present invention will be described using FIG. 4.

In FIG. 4, the difference from the above embodiment is that a time switch 9 serving as a time energization control means for daytime power is connected only to the lower daytime power heater 5', and power can be energized arbitrarily to the upper daytime power heater 5'. The switch 1o is provided, and with this configuration, it is possible to provide inexpensive control of the upper daytime power heater, which is activated in the event of sudden overuse of hot water.

Effects of the Invention As described above, the electric water heater of the present invention that utilizes late-night power and daytime power provides the following effects.

(1) By setting the time energization control means for daytime power outside of peak hours of electricity usage, the peak of electricity usage does not have to increase, and the capacity of the power receiving equipment can be reduced.

(Operation) The daytime power heater automatically turns on and off, so there is no need to forget to turn the heater on or off, and there is no wasted daytime power consumption.

(3) By setting the daytime power supply time control means in accordance with the actual state of hot water supply usage, effective daytime power supply with less remaining hot water can be achieved, resulting in energy saving and economical performance. It is.

[Brief explanation of drawings]

FIGS. 1 and 2 are block diagrams of a conventional electric water heater, FIG. 3 is a block diagram showing an electric water heater according to an embodiment of the present invention, and FIG. 4 is a block diagram showing another embodiment of the electric water heater of the present invention. It is a block diagram which shows an example. 1... Hot water storage tank, 4... Heater for late-night power, 5... Lower heater for daytime power, 5'...
... Upper daytime power heater, 6.7. 7'...
...Temperature control means, 9...Time energization control means,
1o...Switch. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 3 Figure 3 Figure 4

Claims (2)

[Claims] (1) A heater for late-night power and a lower heater for daytime power provided at the bottom of the hot water storage tank, an upper heater for daytime power provided at the top of the hot water storage tank, temperature control means for each of the heaters, and a time-based energization of daytime power. An electric water heater consisting of a time energization control means for controlling the time. (2) The electric water heater according to claim 1, wherein the time energization control means is connected only to the lower daytime power heater, and the upper daytime power heater is provided with a switching means that can arbitrarily energize the heater.