JPH088736Y2 - Hot water storage type electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hot water storage type electric water heater, and more particularly to a hot water storage tank thereof.

[Conventional technology]

As shown in FIG. 2, in the conventional hot water storage type electric water heater, the water supply pipe 2 is connected to the bottom of the hot water storage tank 1, the discharge pipe 3 is connected to the top of the hot water storage tank 1, and the hot water storage tank is connected from the top. The sheathed heater 4 is inserted into the inside of 1. Water supply pipe 2 above
A regulating valve 5 is provided at the outlet of the regulating valve 5, and the outlet of the regulating valve 5 is connected to the discharge pipe 3 by a connecting pipe 6, and the hot water supply pipe 7 extends from the connecting portion.

Further, the hot water storage tank 1 is provided with constant temperature holding and temperature rise prevention elements 8 and 8 ', and a drain pipe 9 is provided at the bottom of the hot water storage tank 1.
Is provided. A heat insulating material 10 made of glass wool or the like is wound around the outer periphery of the hot water storage tank 1 in order to insulate the heat and to prevent the temperature of the casing from rising.

The assembly of the electric water heater having the above configuration is the casing 11
It is incorporated in the water supply pipe 2 and is fixed to the casing 11 by the flange 12 provided on the water supply pipe 2.

The electric water heater described above heats water stored in the hot water storage tank 1 through the water supply pipe 2 by energizing the sheath heater 4 to store hot water. When hot water is needed, the adjusting valve 5 is operated to supply water to the hot water storage tank 1, and the supplied hot water is discharged from the discharge pipe 3. Further, the amount of water adjusted by the adjusting valve 5 flows into the connection pipe 6, is mixed with the hot water at the outlet of the discharge pipe 3, and the hot water having an appropriate hot water temperature is discharged from the hot water supply pipe 7.

[Problems to be solved by the device]

As described above, the conventional electric water heater uses the means for wrapping the heat insulating material 10 around the outer periphery as the heat insulating means of the hot water storage tank 1, so that the heat insulating property is poor, and the heat loss during boiling and when keeping the hot water is low. Has a major drawback. Further, the work of winding the heat insulating material 10 is required at the time of manufacturing, which is one of the factors that hinder the production efficiency. Further, since the heat insulating material 10 is present, the hot water storage tank 1 is casing only by the portion of the water supply pipe 2.
There is also a problem that it is unstable because it is only fixed to 11, and cannot be supported by the casing 11 in other parts.

Then, this invention makes it a technical subject to solve the above problems.

[Means for solving the problem]

In order to solve the above problems, the present invention is a hot water storage type in which a sheathed heater is installed in a heat-insulating hot water storage tank incorporated in a casing, and a water supply pipe and a hot water supply pipe are connected to the lower and upper portions of the hot water storage tank, respectively. In the electric water heater, the hot water storage tank is constituted by a vacuum double container, and the hot water storage tank is attached to the casing through spacers on the outer side surface and the bottom portion thereof.

[Action]

Water is supplied from the water supply pipe into the hot water storage tank, and the sheath heater is energized to heat and keep it warm. When hot water is required, water is supplied from the water supply pipe, and the supplied amount of hot water is discharged from the hot water supply pipe.

The hot water storage tank is fixed to the casing at the portion of the water supply pipe, and is supported by the casing via spacers at a plurality of locations.

〔Example〕

The embodiment shown in FIG. 1 is different from the conventional one in that the structure of the hot water storage tank 1 is a metallic vacuum double tank. In other configurations, the discharge pipe 3 is connected to the top of the hot water storage tank 1, the sheathed heater 4 is inserted, and the water supply pipe 2 and the drain pipe 9 are connected to the bottom, as in the conventional case. The water supply pipe 2 is provided with a regulating valve 5, and a connecting pipe 6 is connected between the outlet of the regulating valve 5 and the discharge pipe 3. A hot water supply pipe 7 is provided on the front end side from the connection portion with the discharge pipe 3. Also hot water storage tank 1
A constant temperature maintenance and temperature rise prevention element 8 is attached to the.
For fixing to the casing 11, in addition to fixing the brim 12 of the water supply pipe 2 to the casing 11, a spacer 13 is interposed between the bottom of the hot water storage tank 1 and the casing 11 at the outer peripheral surface thereof to support the hot water storage tank 1. ing.

In the electric water heater described above, the water supplied to the hot water storage tank 1 is boiled by the sheath heater 4 to keep it warm, as in the conventional case. If the adjustment valve 5 is opened and water is supplied as needed,
The amount of hot water corresponding to the supplied amount is discharged to the discharge pipe 3, mixed with the water flowing into the connection pipe 6, and discharged from the hot water supply pipe 7.

[Effect of device]

As described above, since the present invention uses the vacuum double container as the hot water storage tank in the electric water heater, it releases less heat than the conventional case in which the heat insulating material is wound. Therefore, there are effects such that the time until boiling is shortened, the power consumption during the heat retention is small, and the variation in the hot water temperature in the tank is small. Further, there is an effect that the number of steps for winding the heat insulating material can be saved at the time of manufacturing, and the work of attaching the hot water storage tank can be facilitated.

Further, since the hot water storage tank can be supported by the casing at a plurality of locations by interposing spacers at a plurality of locations between the hot water storage tank and the casing, there is an effect that the hot water storage tank is stabilized.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment, and FIG. 2 is a sectional view of a conventional example. 1 ... hot water tank, 2 ... water supply pipe, 3 ... discharge pipe, 4 ... sheath heater, 5 ... adjusting valve, 6 ... connection pipe, 7 ... hot water supply pipe, 8, 8 '... constant temperature And overheat prevention element, 9 ...
… Drain pipe, 10 …… Insulation, 11 …… Casing, 12 ……
Brim, 13 ... spacer.

Claims (1)

[Scope of utility model registration request] 1. A hot water storage type electric water heater comprising a sheathed heater installed in a heat-insulating hot water storage tank incorporated in a casing, and a water supply pipe and a hot water supply pipe connected to the lower and upper portions of the hot water storage tank, respectively. A hot water storage type electric water heater, characterized in that the hot water storage tank is constituted by a vacuum double container, and the hot water storage tank is attached to a casing on the outer side surface and the bottom portion thereof via spacers.