JPS63161353A - Heat storage type electric water heater - Google Patents

Abstract

PURPOSE:To increase the heat exchange efficiency and to reduce the capacity of a vessel by providing a heat storage material and partition plates dividing the heat storage material into a plurality of heat storage material components and accommodating the same, and constituting the water heater so that heat from a heat generating member is constantly stored in the heat storage material, and further adjusting the quantity of heat emitted from a heating element for controlling the heat storage quantity of the heat storage material by an automatic temperature adjustor. CONSTITUTION:When power supply from a power source 12 to a heating element 2 is started, heat is stored in a heat storage material 8 through water within in a tank 7 and the heat storage material 8 is heated to a predetermined temperature, for example, to approximately 90 deg.C. An automatic temperature adjustor 11 carries out the opening and closing control of a contact so that the power supply to the heating element 2 is repeated every predetermined time, thereby to hold the heat storage material 8 at a predetermined temperature. At the time of carrying out collecting hot water, the power supply to the heating element 2 is carried out by the hot water supplying operation, and water supplied by the pressure of service water is passed through the tank 7. Thus, a heat exchange is carried out between the heat storage material 8 and water, whereby it becomes possible to take out hot water instantaneously through a hot water supply pipe 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric water heater that supplies hot water heated by a heating element, and particularly to a regenerative electric water heater that stores the heat of the heating element. .

[Prior Art] Electric water heaters that instantaneously supply hot water heated to a desired temperature by a heating element such as an electric heater are well known. Many of them are of the hot water storage type.

In the figure, (1) is a cylindrical hot water storage tank with a structure that is resistant to internal pressure, and (2) is a heating element installed at the bottom of the hot water storage tank (1), which consists of an electric heater, etc. (3) is an automatic temperature controller that controls the boiling temperature of hot water and is installed on the lower wall of the hot water storage tank (1), and (4) is a device that controls the boiling temperature of hot water in the hot water storage tank (1). Hot water pipe (5) is for hot water storage tank (1)
A water supply pipe that supplies water from a water source such as a tap into the interior of a building.

Therefore, according to this electric water heater, the operation for supplying hot water starts energizing the heating element (2), and the water in the hot water storage tank (1) is heated by opening and closing the contacts in the automatic temperature controller (3). It is heated to a constant temperature, for example 85°C, by control.

During this boiling process, the water expands, but as mentioned above, the hot water storage tank (1) has a cylindrical shape, so it can cope with the pressure caused by the expansion. This boiled hot water is then supplied from the hot water pipe (4) by opening and closing the valve (4a).

[Problems to be Solved by the Invention] However, with such conventional water heaters, there are problems in that it is not possible to heat water with good heat exchange efficiency, and it is not possible to reduce the size of the water heater. there were.

In other words, with a hot water storage type, heat is stored in the water as hot water, so if a large amount of hot water is used, the capacity of the hot water storage tank must be increased, and the hot water storage tank (1
), it is necessary to boil water in advance, and if it is not used frequently, it will waste electricity.

Furthermore, in order to cope with the water pressure acting on the hot water storage tank (1) or the pressure increase during boiling, the tank shape had to be spherical or cylindrical, which required a relatively large installation area.

Purpose of the Invention The present invention was made to solve the above-mentioned problems, and provides a heat storage type that can increase the amount of heat stored per unit volume in the container by increasing the heat exchange efficiency, thereby reducing the size of the container. The purpose is to obtain an electric water heater.

Means for Solving Problem c] The heat storage type electric water heater according to the present invention includes a heating element provided in the lower part of the inside of a container for heating water, and includes a heat storage material and a heat storage material. A partition plate is provided to divide and store the heat storage material into a plurality of parts, and the heat storage material is configured to constantly store heat from the heating element.Furthermore, an automatic temperature controller is provided, which controls the amount of heat stored in the heat storage material. It is characterized by adjusting the calorific value of the heating element.

[Function] According to the above configuration, a predetermined amount of heat is stored in the plurality of heat storage materials provided by the partition plates inside the container.
By passing water into the container when necessary, heat exchange is instantaneously performed between the plurality of heat storage materials and water. Therefore, hot water is extracted instantly.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the overall configuration of the first embodiment of the regenerative electric water heater, and in the figure, (2) to (5) are the same as the members shown in the conventional example, and (7) is a container (tank)
, (8) is a heat storage material that stores heat from the heating element (2), and materials such as paraffin, high-density polyethylene, and clathrate hydrates that store heat mainly using latent heat are used. , heat from the heating element (2) can be efficiently stored.

A ball-shaped container (9) is used as a partition plate and is made of a material such as aluminum, and the heat storage material (8) is housed in the ball-shaped container. (10) is a ball-shaped container (9)
a second partition plate that partitions the heating element space in which is housed and the heating element space provided at the lower part of the tank (7);
(11) is an automatic temperature regulator that adjusts the amount of heat generated by the heating element (2), and controls the amount of heat stored in the heat storage material (8), that is, the temperature of the heat storage material itself, to a predetermined value.

FIG. 2 shows a circuit showing the electrical connection state in the embodiment, where (12) is a power source for the heating element (2), and the heating element (2) and the automatic temperature controller (11) are connected to each other. Power supply (1
2) is connected in series.

The first embodiment has the above configuration, and its operation will be explained below.

First, when the power source (12) starts energizing the heating element (2), heat is stored in the heat storage material (8) in the tank (7) through water, and the temperature is raised to a predetermined temperature, for example, about 90°C. heated. In this case, the automatic temperature controller (11) controls the opening and closing of its contacts to control the energization of the heating element (2). By controlling opening and closing, the heat storage material (8) is kept at a constant temperature.

The temperature of the heat storage material (8) is set to a predetermined temperature at which the phase change in the heat storage material (8) is completed, and heat is stored as latent heat in the heat storage material (8). In this way, once heat is applied to the heat storage material (8), a predetermined temperature can be maintained for a long period of time, and high-temperature hot water can be obtained at any time using a small-capacity tank.

When hot water is sampled, the heating element (2) is energized by the lead bath operation, and the water supplied by the pressure of city water is passed through the tank (7), so that the heat storage material (8) and the water are connected to each other. Heat exchange takes place between the hot water pipes (5), which allows hot water to be taken out instantly from the hot water pipe (5).

Next, a second embodiment of the present invention will be described based on FIG.

The second embodiment is a water heater with a simplified structure of the partition plate, in which a heat storage material (8) divided into two halves is provided above the heating element (2), and the partition plate (13 ) has been established. This partition plate (13) is designed to have a wide area so that it can easily absorb heat from the heat storage material (8), and in the second embodiment, it is designed to have a sufficient depth.

According to this second embodiment, heat exchange is performed between the heat storage material (8) and water by passing water through the partition plate (13).

In addition, in the first and second embodiments, a paraffin-based or polyethylene-based heat storage material (8) is used, but it may be made of a metal lump.

[Effects of the Invention] As described above, according to the present invention, the heat storage material divided into a plurality of parts by partition plates is provided in the container, and the heat storage material is stored as latent heat, so that the unit capacity of the container is reduced. It becomes possible to increase the amount of heat stored per unit and to make the heat exchange efficiency extremely high.

Further, there is an advantage that the capacity of the container can be made extremely small, and the electric water heater can be downsized.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing a first embodiment of a regenerative electric water heater according to the present invention, FIG. 2 is an electrical connection state diagram of the embodiment,
FIG. 3 is an overall configuration diagram showing a second embodiment of the present invention, and FIG. 4 is a configuration diagram showing a conventional hot water storage type electric water heater. In the figure, (1) is a hot water storage tank, (2) is a heating element, (3) is an automatic temperature controller, (7) is a tank, (8) is a heat storage material, (
9) is a ball container as a partition plate, (10) is a second partition plate, (11) is an automatic temperature controller of the present invention, and (13) is a second partition plate.
) is a partition plate. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A container provided with a heating element at the bottom thereof, a heat storage material provided inside the container to store heat from the heating element, and a partition plate for dividing and storing the heat storage material into a plurality of parts;
A regenerative electric water heater, comprising: an automatic temperature controller that adjusts the amount of heat generated by the heating element. (2) A ball container is used as the partition plate, and the ball container containing the heat storage material is arranged at a higher position than the position where the heat generating element is attached, so that the second space for partitioning the space for the heat generating element and the space for the heat storage material is arranged. A regenerative electric water heater according to claim 1, characterized in that a partition plate is provided.