JPH0264351A - Electric hot water supply apparatus - Google Patents

Abstract

PURPOSE:To complete the setting work only by connecting a city water supply pipe to a faucet in field work at the site, by including a pressure reducing valve, a safety valve, a secondary water supply pipe, expanded water relief pipe, and an evaporator in a main body. CONSTITUTION:To set up an electric hot water supply apparatus in a washbasin cabinet, a city water supply pipe is joined to a faucet connector 8, and faucets are respectively connected to a hot water connector 6 and water connector 12, so that the setting work completes easily. The pressure of city water is reduced through a pressure reducing valve 9, stored in hot water storage tank 1, heated by a heater 2 up to the set temperature of a thermostat 3. Expanded water generated by heating is introduced through a relief pipe 13 into an evaporator 14, and heated by a heater 15 to evaporate it into vapor. Therefore, a relief pipe for expanded water is not necessary to provide.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an electric water heater for local use, such as in the kitchen or washroom.

Conventional technology Traditionally, electric water heaters used for local hot water supply in kitchens, etc., have an electric heater installed in a hot water storage tank, and a thermostat that produces hot water at a constant temperature. , pressure reducing valve, safety valve, and piping work for the expansion water release pipe from the safety valve are required.

Problems to be Solved by the Invention When conventional electric water heaters for local use are incorporated into bathroom vanities, system kitchens, etc., it is necessary to install the main body as well as to construct pressure reducing valves, safety valves, and expanded water release pipes from the safety valves. There are issues that require time and effort.

The present invention solves the above-mentioned problems and provides an electric water heater that does not require much labor for construction vehicles.

Means for Solving the Problems In order to solve the above problems, the electric water heater of the present invention is equipped with a hot water storage tank, an electric heater and a thermostat attached to the hot water storage tank, and a pressure reducing valve and a safety valve in the water supply pipe to the hot water storage tank. A secondary water supply pipe branched from between the pressure reducing valve and the safety valve, a hot water supply pipe are built in, and an evaporator is built in to evaporate the expanded water from the safety valve.

Operation In the above configuration, when installing the main body, the installation work is completed by connecting a water pipe to the water supply pipe, and connecting a mixing valve to the hot water supply pipe and the secondary water supply pipe, or a water faucet to each of them.

The hot water supplied from the water pipe is depressurized by a pressure reducing valve and stored in a hot water storage tank, and by energizing the heater, the hot water in the hot water storage tank is heated to the temperature set by the thermostat. Expanded water generated in this hot water heating process is led to an evaporator and evaporated by heating means such as a heater.

Example An embodiment of the present invention will be described based on FIG.

A indicates a main body casing, and the following components are built into the main body casing A. In other words, 1 is a hot water storage tank that stores hot water. 2 is a heater, which is attached to the hot water storage tank 1. A thermostat 3 is fixed to the bottom wall of the hot water storage tank 1 and controls the supply of electricity to the heater 2. 4 is a heat insulating material that prevents heat radiation from the hot water storage tank 1; 5 is a hot water supply pipe provided at the top of the hot water storage tank; and 5 is provided with a hot water supply connection mouthpiece 6. 7 is hot water storage tank 1
It is a water supply pipe installed at the bottom of the water supply pipe, and is equipped with a water supply connection cap 8 and a pressure reducing valve 9 between the water supply pipe 7 and the water supply connection cap 8.
and a safety valve 10. 11 is a secondary water supply pipe 2
A secondary water supply connection cap 12 is provided. The secondary water supply pipe 11 is branched from the outlet of the pressure reducing valve 9. 13 is an expanded water release pipe from the safety valve 10 and is connected to the evaporator 14. Evaporator 1
4 is equipped with a heater 15. The heater 15 is energized when a weight sensor or a water level sensor (not shown) detects that expanded water has accumulated in the evaporator 14. Further, in this embodiment, the evaporator 14 is provided independently,
Although the evaporation heater 15 is installed, an evaporation tank may be provided integrally with the hot water storage tank 1 to evaporate the expanded water using the heat of the hot water storage tank 1.

To incorporate the electric water heater of this embodiment into a bathroom vanity, connect the water pipe to the water supply connection base 8, and connect the water supply connection bases 6 and 2.
A faucet fitting is connected to the next water supply connection mouthpiece 12, respectively. The installation work can be completed easily. Tap water is depressurized through a pressure reducing valve 9, stored in a hot water storage tank 1, heated by a heater 2, and boiled to a temperature set by a thermostat 3. The expanding water produced by this heating effect is
It is led to the evaporator 14 through the relief pipe 13, heated by the heater 15, and evaporated. Therefore, there is no need to provide relief piping for the expanded water.

Effects of the Invention The electric water heater of the present invention has a pressure reducing valve 1, a full-valve secondary water supply pipe, an expanded water release pipe, and an evaporator built into the main body, so it is necessary to connect water pipes and water supply during construction on site. It has the advantage of being extremely easy to install, such as simply connecting the plug fittings.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electric water heater showing an embodiment of the present invention. 1... Hot water storage tank, 2... Heater, 3
・・Seal・Thermostat, 4・・・・Insulation material, 5・
...Hot water pipe, 7...Water supply pipe, 9...
...Reducing valve, 10...Safety valve, 11...
・Secondary water supply pipe, 13...Relief pipe, 14...
...Evaporator, 15...Heater. Figure 1 1-J hot water tank

Claims (1)

[Claims] A hot water storage tank, an electric heater attached to the hot water storage tank, a thermostat that controls energization to the electric heater, a safety valve, a pressure reducing valve, and a pressure reducing valve provided in a water supply pipe of the hot water storage tank.
An electric water heater that is equipped with a secondary water supply pipe that branches from between the safety valves, a hot water supply pipe, and an evaporator that evaporates the expanded water from the safety valve.