CN201318788Y

CN201318788Y - Water-storage electric water heater inner tank

Info

Publication number: CN201318788Y
Application number: CNU2008201008208U
Authority: CN
Inventors: 邝锦明
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-28
Filing date: 2008-11-28
Publication date: 2009-09-30
Anticipated expiration: 2018-11-28

Abstract

The utility model relates to a water-storage electric water heater inner tank, which comprises the inner tank, a hot-water outlet pipe with one end stretching into the inner top of the inner tank, an electric heater for heating water in the inner tank, and a cold-water inlet pipe of the inner tank. The water-storage electric water heater inner tank is characterized in that an inner connecting pipe is arranged in the inner tank; one end of the inner connecting pipe is communicated with a water outlet of the cold-water inlet pipe, and the other end thereof stretches out of the top of the inner tank; the inner tank further comprises an anti-vacuum valve mounted at the outer end part of the inner connecting pipe and communicated with the inner connecting pipe, as well as an inner sleeve mounted in the inner connecting pipe; a clearance is reserved between the inner sleeve and the inner connecting pipe, so that water in the water inlet pipe can flow upwards; one end of the inner sleeve serving as a cold-water inlet is higher than the top of the inner tank but is lower than the outer end part of the inner connecting pipe, so that water can flow in from the cold-water inlet of the inner sleeve; and the other end of the inner sleeve serving as a cold-water outlet is positioned at the bottom of the inner tank and communicated with the inner tank so as to form a cold-water inlet passage, and the cold-water outlet end is not communicated with the water outlet of the water inlet pipe. The water-storage electric water heater inner tank can effectively prevent hot water from flowing backwards to the cold-water inlet pipe and the inner tank to generate vacuum (subpressure), thereby avoiding the damage to the water heater inner tank due to water supply system failures; and meanwhile, the electric water heater inner tank has the advantages of safe and reliable use as well as simple repair and maintenance.

Description

The water-storage electric heater inner bag

Technical field

The utility model relates to a kind of water-storage electric heater inner bag.

Background technology

Existing water-storage electric heater inner bag is meant the water heater of working under the pressure of running water, control water yields at the outlet system place by one or more valves, as shown in Figure 1.It takes hot water, and mainly to rely on intake pressure be power, its principle is:close the outlet valve inner bag and bear intake pressure (tap water pressure) after the water storage inner bag is filled water, when treating that the water heater outlet valve is opened in water heating back in the courage, cold water is advanced from water storage inner bag bottom, hot water is through the top of outlet pipe simultaneously, in managing, continuously outflow in a steady stream, reach the purpose of taking hot water.This shows, take hot water and be actually and directly be subjected to intake pressure (tap water pressure) effect that make under the cold water, hot water ejects and used the top water law to take the hot water principle.Take hot water in this way, the defective of existence has:1. the tap water supply guard system keep in repair pipeline for some reason, the situation of cutting off the water, the phenomenon of " refluence " water inlet pipe can appear in the water of water storage inner bag, Zao Cheng storage water inner bag water level reduces, the heater element dry combustion method was lost efficacy; 2. make water supply piping system produce big suction and siphon takes place owing to the tap water supply pipe-line system is provided with the low reasons such as drop that produce of booster pump and water supply story height, water heater liner water is siphoned away and can produce vacuum (negative pressure) and inner bag is damaged make it to leak.

The utility model content

The purpose of this utility model is to adopt when taking hot water under the water law principle situation of top, solves above defective, prevents that the interior water of inner bag is from cold water pipe refluence, anti-vacuum, water-storage electric heater inner bag safe in utilization, reliable.

In order to achieve the above object, the utility model is achieved in that it is a kind of water-storage electric heater inner bag, comprises inner bag, and an end stretches into the hot water outlet pipe of inner bag inner top, the electric heater that the water in the inner bag is heated and the cold water inlet of inner bag; It is characterized in that: also comprise the inner connecting tube that is located in the inner bag, the one end is communicated with the delivery port of cold water inlet, and the other end stretches out outside the top of inner bag; Also comprise and be located at the anti-vacuum valve inner connecting tube outer end and that be communicated with it; Also comprise the inner sleeve that is located in the inner connecting tube, gapped between inner sleeve and the inner connecting tube, thereby the water of water inlet pipe can up be flowed, inner sleeve one end is a cold water inlet, this end is higher than the inner bag top but is lower than the inner connecting tube outer end so that water can flow into from the cold water inlet of inner sleeve, and the other end is the cold water delivery port, and this end is positioned at the bottom of inner bag and is communicated with inner bag, thereby form the cold water intake tunnel, this end is not communicated with the delivery port of water inlet pipe.

Described inner sleeve is L-shaped, and its vertical tube is positioned at inner connecting tube, and transverse tube one end is communicated with vertical tube, and the other end stretches in the inner bag.

The utility model advantage compared with prior art is that the novel water inlet structure and the setting of anti-vacuum valve can prevent effectively that hot water from flowing backward to cold water inlet and inner bag produces vacuum (negative pressure), have avoided causing the water heater liner damage because of the water system fault.Novel water inlet structure can guarantee that inner bag is full of water, and heat-generating pipe is immersed in the water fully, can not surface because of water " refluence " makes the heating line, causes that dry combustion method damages.Peripheral protection facilities such as non-return valve is installed have just been removed in the setting of anti-vacuum valve from supply channel, and the security of anti-vacuum valve, economy, reliability are far superior to valve classes such as non-return valve.Maintenance is simple.

Description of drawings

Fig. 1 is the prior art constructions schematic diagram;

Fig. 2 is a structural representation of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is done further detailed description:

As shown in Figure 2, it is a kind of water-storage electric heater inner bag, comprises that inner bag 2, one ends stretch into the hot water outlet pipe 7 of inner bag inner top, the electric heater 6 that the water in the inner bag is heated and the cold water inlet 5 of inner bag; Spy of the present utility model is: also comprise the inner connecting tube 4 that is located in the inner bag 2, the one end is communicated with the delivery port sealing of cold water inlet 5, and the other end stretches out outside the top of inner bag; Also comprise and be located at the anti-vacuum valve 1 inner connecting tube outer end and that be communicated with it; Also comprise the inner sleeve 3 that is located in the inner connecting tube, gapped between inner sleeve and the inner connecting tube, thereby the water of water inlet pipe can up be flowed, inner sleeve one end is a cold water inlet 31, this end is higher than the inner bag top but is lower than the inner connecting tube outer end so that water can flow into from the cold water inlet of inner sleeve, and the other end is a cold water delivery port 32, and this end is positioned at the bottom of inner bag and is communicated with inner bag, thereby form the cold water intake tunnel, this end is not communicated with the delivery port of cold water inlet 1.

In the present embodiment, inner sleeve 3 is L-shaped, and its vertical tube is positioned at inner connecting tube 4, and transverse tube one end is communicated with vertical tube, and the other end stretches in the inner bag.

During use, when the water heater operate as normal, water enters from cold water inlet 1, flow to along inner connecting tube 4 then and be higher than the inner bag place, cold water inlet 31 from inner sleeve 3 flows into again, flow to the inner bag bottom through the delivery port 32 of inner sleeve and enter in the container, hot water flows out from hot water outlet pipe 7 simultaneously, and the anti-vacuum valve 1 of this moment is in closed condition.If water supply obstacle reason generation water supply line suction such as (as) maintenances of cutting off the water takes place, anti-vacuum valve is opened, pour in atmosphere, form logical atmosphere zone at the inner sleeve top and bottom the anti-vacuum valve, inner connecting tube is equated with porch, inner sleeve top pressure, water will stop to flow, and keep inner bag water in full state; When pressure of supply water just often, anti-vacuum valve cuts out again, enters the normal operation state.

Claims

1, a kind of water-storage electric heater inner bag comprises inner bag, and an end stretches into the hot water outlet pipe of inner bag inner top, the electric heater that the water in the inner bag is heated and the cold water inlet of inner bag; It is characterized in that: also comprise the inner connecting tube (4) that is located in the inner bag (2), the one end is communicated with the delivery port of cold water inlet (5), and the other end stretches out outside the top of inner bag (2); Also comprise and be located at anti-vacuum valve (1) the inner connecting tube outer end and that be communicated with it; Also comprise the inner sleeve (3) that is located in the inner connecting tube, gapped between inner sleeve and the inner connecting tube, thereby the water of water inlet pipe can up be flowed, inner sleeve one end is cold water inlet (31), this end is higher than the inner bag top but is lower than the inner connecting tube outer end so that water can flow into from the cold water inlet of inner sleeve, and the other end is cold water delivery port (32), and this end is positioned at the bottom of inner bag and is communicated with inner bag, thereby form the cold water intake tunnel, this end is not communicated with the delivery port of water inlet pipe (1).

2, according to the described water-storage electric heater inner bag of claim 1, it is characterized in that: described inner sleeve (3) is L-shaped, and its vertical tube is positioned at inner connecting tube (4), and transverse tube one end is communicated with vertical tube, and the other end stretches in the inner bag.