RU70707U1 - WATER HEATER - Google Patents

Abstract

Use: intended for heating water in the absence of hot water supply. Essence: improving the reliability of work by providing automatic protection of the inner surface of the tank from scale and other deposits in electric and gas storage water heaters, as well as increasing the efficiency of the heating element, which allows to reduce the level of energy consumption. The specified result is achieved due to the fact that the water heater contains a working tank (1) with pipes (5) (7) for supplying cold water and removing hot water, as well as a heating element (8) with a temperature adjustment device (9). A feature of the proposed utility model is that the cold water supply pipe (5) is made in the form of a tube equipped with nozzles (6) facing the bottom (2) of the working tank, while the cold water supply pipe is parallel to the bottom of the tank. FIG.

As can be seen from the text of the abstract, it included all the essential features of the claims, as well as additional information regarding the achieved technical effect.

Description

The utility model relates to the electric power industry and can be used in gas and electric water heating devices in the absence of hot water supply, as well as to provide the consumer with an autonomous source of hot water during periodic or emergency shutdowns from the centralized hot water supply.

Two types of storage water heaters are known - electric and gas. Accumulative water heaters, designed, as a rule, for the gradual heating of large volumes of water, are economical.

When designing water heaters, it is necessary to solve a number of problems, such as increasing efficiency, speed of heating water, reducing material costs, etc.

Among these problems, the protection of the water heater from scale and other deposits contained in water occupies a special place.

Known water heater (see Japanese patent JP 3658818 B2 9145156 A, CL 7 F24H 1/10, publ. 08.06.05) containing a pipeline for supplying tap water connected to the heater. The heater comprises a fuel element located in the housing, a spiral heating element located on the outer surface of the housing connected to an alternating current source; a device for purifying water before a heater or purifying hot water; temperature sensor, released hot water; a heater power control device for the measured water temperature in order to maintain a given water temperature; a water flow sensor and a device for controlling the water flow according to the input signal of the flow sensor in order to maintain a given water flow.

The disadvantage of this heater is the need to install an additional water purification system in front of the heater, which complicates the design.

A known heater (see Japanese patent JP 3421301 B2 2000329407 A, class 7 F24H 1/18 publ. 06/30/03), comprising a device for hygienic washing with a nozzle for supplying a jet of water when a signal for washing; an electric water heater located in the water heating chamber with holes for supplying and outputting heated water to the nozzle. The heater is characterized in that it contains a temperature sensor for heated water and a device for controlling the electric current passing through the heater. The control device, when a flushing signal is received when the heater is on, first generates a signal to supply full current to the heater, and then a signal to regulate the electric current in accordance with the temperature of the heated water in order to maintain it equal to the set temperature.

The disadvantage of the considered technical solution is the design complexity due to the installation of an additional electronic circuit that generates a flushing signal.

The closest in its design and technical essence of the proposed utility model is a system for heating and storing water TERMEKS G5 (see www.thermex.ru. Product catalog of the TERMEX group of companies, page 11).

The electric heater has an external housing; internal tanks with connecting branch pipes; polyurethane foam insulation; hot water intake and cold water supply tubes; a flange with a heating element and a thermostat, as well as a drain pipe of the self-cleaning / draining system.

However, a significant drawback of the analyzed technical solution is its low reliability,

due to insufficient protection of the tank from scale and other deposits present in the water.

As scum and other deposits accumulate inside the tank during the operation of the water heater, they create a barrier between the heating element and the volume of water, and also contribute to overheating of the steel around the welds or the heating element. As a result, the efficiency of the heating element decreases, the energy consumption increases, and the risk of leakage of the tank and failure of the heating element increases.

The objective of the proposed utility model is to increase the reliability of the water heater by automatically protecting the inside of the tank from scale and other deposits in electric and gas storage water heaters.

To achieve this goal, a water heater is proposed, which, like the one closest to it, selected as a prototype, contains: a working tank with pipes for supplying cold water and removing hot water, as well as a heating element with a temperature adjustment device.

A feature of the proposed utility model that distinguishes it from the well-known one adopted as a prototype of a water heater is that the cold water supply pipe is made in the form of a tube equipped with nozzles facing the bottom of the working tank, while the cold water supply pipe is parallel to the tank bottom.

In the proposed device, a stream of cold water under pressure is directed to the bottom of the water heater, preventing the sediment from accumulating at the bottom of the tank. Spinning turbulent

the flow helps to maintain the sediment in suspension, taking it out when using hot water.

Thus, the combination of the above features allows us to solve the tasks.

The proposed utility model is illustrated in the drawing, which shows one of the specific examples of the implementation of the proposed water heater.

In FIG. shows a General view of the water heater (in section).

The water heater consists of a sealed working tank 1 with a bottom 2, an outer casing 3 and a heat insulation located between them 4. An inlet pipe 5 for supplying cold water with nozzles 6 that create a swirling turbulent flow and an outlet pipe 7 designed to discharge hot water is mounted in the lower part of the working tank water. In the lower part of the working tank there are: an electric heating element 8, a temperature adjustment device (thermal sensor) 9 and an anode 10, designed to protect the structural elements of the water heater from electrochemical corrosion. On the front panel there are: a scale 11 of the temperature sensor 9, a switch 12 and a light bulb 13 indicating the inclusion of an electric heating element 8.

Sealed working tank 1 can be made of stainless or enameled steel. The outer casing 3 of the water heater can be made of special structural plastic, painted steel, or stainless steel. Inlet 5 and outlet 7 of the heater nozzle are made of stainless steel. As the electric heating element 8, closed heating elements of the type TEN are used. The anode 10 is made of magnesium alloy. Thermal insulation 4 filling the cavity between

working tank 1 and outer casing 3, made of environmentally friendly polyurethane foam. Polyurethane foam has a low coefficient of thermal conductivity and is the most effective heat-insulating material.

The proposed storage water heater in the operating mode of operation operates in the usual way.

Before connecting to the electric network, the water heater is filled with cold water, which through the inlet pipe 5 with nozzles 6 enters the working tank 1, filling it and expelling air from it through the outlet pipe 7. As soon as the water fills the tank, it will pour out through the outlet pipe 7, which is a sign of a full tank. After that, the outlet valve (not shown) is closed at the outlet pipe 6 and the water heater is connected to the mains. As it is heated, water due to convection rises to the upper part of the working tank, gradually heating and replacing cold water in it. The flow of hot water occurs from the top of the working tank, while the vacant volume is filled under pressure with cold water through a cold water supply pipe 5 equipped with nozzles 6. This creates a swirling turbulent flow that maintains the precipitates in suspension, taking them out when the hot water is parsed. and preventing them from accumulating at the bottom of the tank.

The user sets the desired temperature mode. The water in the working tank is heated by the heating element 8, which is turned on by the switch 12, while the indicator light 12 lights up. Scale 11 shows the actual water temperature. At a flow rate of hot water, its volume is continuously replaced by water from the bottom of the working tank.

Thus, the use of the proposed utility model by providing automatic protection of the inner surface of the tank from scale and other deposits in electric and gas storage water heaters allows to increase the reliability of the water heater and increase the efficiency of the heating element, which ensures low energy consumption.

Claims (2)

1. A water heater comprising a working tank with pipes for supplying cold water and hot water, a heating element with a temperature control device, characterized in that the pipe for supplying cold water is made in the form of a tube equipped with nozzles facing the bottom of the working tank. 2. The water heater according to claim 1, characterized in that the cold water supply pipe is parallel to the bottom of the tank.