CN208620587U - Single port Horizontal single-pipe Natural Circulation Combined type electric heater - Google Patents

Abstract

The utility model relates to a kind of single port Horizontal single-pipe Natural Circulation Combined type electric heaters, including inner tube, outer tube, heater element, it is characterized in that: inner tube is the closed blind pipe of the other end open at one end, inner tube is from the tail portion of outer tube insertion outer tube, only except open end dew outer tube, the tail end of outer tube and the open end lateral wall of inner tube are closed and connect, and form inside and outside cannula structure, and the other end of outer tube is open end；Heater element is sleeved on inner tube lateral wall, and the connecting terminal of heater element is drawn from the open end of outer tube.Its advantage is that: the utility model is installed in electric water-heating apparatus, and inner tube completes interior heat exchange as main heat exchanger components, by single port Horizontal single-pipe Natural Circulation, thermal conversion efficiency is improved, reduces heat loss, inner tube non-scaling to the greatest extent, it is safe and reliable, it is seldom faulty.

Description

Single port Horizontal single-pipe Natural Circulation Combined type electric heater

Technical field

The utility model relates to a kind of single port Horizontal single-pipe Natural Circulation Combined type electric heaters, belong to electric heater skill Art field.

Background technique

Existing electric water-heating apparatus mainly has electric heater, electric hot water etc., and the critical component of electric water-heating apparatus is to add Thermal element, the heating method of heating element have resistance-type heating and electromagnetic type heating.Resistance-type heats generally with built-in heating unit Based on part, it may be assumed that heating element is arranged in water tank, and electromagnetic type heating generally uses external heating elements.Resistance-type heating Heating element mainly uses electric heating tube, and electric heating tube is divided into ceramic heating pipe and immerging metal tube heater again, and heating method is Heat exchange pattern, advantage are: energy conversion rate is high, heat loss is small, the disadvantage is that: heating speed is slow, electric heating tube surface scale is tight Weight；The heating element major electromagnetic coil of electromagnetic type heating, heating method are electromagnetic eddy heating, and water pipe is from electromagnetic coil The heart passes through, and advantage is: water is crossed i.e. hot, and heating speed is fast, electricity separation, highly-safe, the disadvantage is that: need water pump driving water into Row circulating-heating, easy fouling blockage water pipe in water pipe.In conclusion either resistance-type heating or electromagnetic type heating, heating Pipe fitting fouling itself is a global problem, currently without good solution.It is existing anti-for small electrothermal hydrophone Only the method for fouling is that magnesium bar is installed in water tank, and this method can only delay the speed of heat pipes fouling, cannot prevent to tie Dirt, and for electric hot water, there is the physical oil production method that strong magnetic device is installed on boiler water inlet pipe, but effect is not It is fairly obvious, so this physical oil production can be used only on small tonnage boiler, and for large-tonnage boiler, it is desirable that it is equipped at water Device is managed, water is softened, this will greatly increase the operating cost of boiler.For resistance-type heating method, outside electric heating tube Wall fouling is too thick, and the heat of resistance wire can be prevented to external diffusion, so that heat gathers in electric heating tube, causes heating element overheats And it damages；For electromagnetic type heating method, fouling can block water pipe in water pipe.The bad removing of heat pipes fouling, not only significantly The heat exchange efficiency of electric water-heating apparatus is reduced, and substantially reduces its service life, or even often to replace heating component, Cause the use cost of electric water-heating apparatus higher.

Summary of the invention

The purpose of the utility model is to provide a kind of energy conversion rate height, heating speed is fast, maintenance cost is low, and can be skilful The wonderful heat pipes solved the problems, such as in electric water-heating apparatus are influenced the short single port level of the low service life of heating efficiency by scale Single-pipe natural circulation composite electric heater.

The purpose of this utility model is achieved in the following ways:

The utility model includes inner tube, outer tube, heater element, it is characterized in that: inner tube is that the other end open at one end is closed Blind pipe, inner tube is from the tail portion of outer tube insertion outer tube, only except open end dew outer tube, outside the tail end of outer tube and the open end of inner tube Side wall closure connection, forms inside and outside cannula structure, and the other end of outer tube is open end；Heater element is sleeved on inner tube lateral wall On, the connecting terminal of heater element is drawn from the open end of outer tube.

The heater element can be slid relative to inner tube；

Ring flange is connected on the open end of outer tube；

The heater element is electromagnetic heating coil, resistance wire class heating coil, carbon film fever casing, charcoal trichite hot jacket One of pipe, infrared emission quartz socket tube；

Insulating layer is equipped between heater element and inner tube lateral wall.

The utility model has the advantages that: the utility model is installed in electric water-heating apparatus, and inner tube is as main heat exchanging part Part completes interior heat exchange by single port Horizontal single-pipe Natural Circulation, improves thermal conversion efficiency, reduce heat waste to the greatest extent It loses, lasting boiling heat transfer can be achieved in single-pipe natural circulation, has very high transfer efficiency, because boiling heat transfer makes in Horizontal single-pipe not Meeting fouling, the combination of boiling heat transfer and Horizontal single-pipe Natural Circulation, flow velocity is quickly, that is to say, that more hotter faster, the inner wall of inner tube Non flouling behaviour, scum and impurity all can due to circulation is brought in heated electric water-heating apparatus water tank deposited bottom, and lead to The sewage draining exit of water tank bottom is crossed, long-term stable operation can be realized by excluding scum and impurity, the electric heater of the utility model, be used Securely and reliably, seldom faulty, even if the fouling on the outer tube outer wall of electric heater, the heat exchange efficiency of inner tube will not be caused to appoint What is influenced, and cleverly solves the problems, such as that the heat pipes of traditional electric water-heating apparatus are influenced heating efficiency by scale.

Detailed description of the invention

Fig. 1 is that the heater element of the utility model uses the structural schematic diagram of electromagnetic heating coil；

Fig. 2 is that the heater element of the utility model uses the structural schematic diagram of resistance wire class heating coil；

Fig. 3 is the use state of the utility model with reference to figure.

Specific embodiment

Referring to attached drawing 1 or 2, the utility model includes inner tube 1, outer tube 2, heater element 3, and inner tube is the other end open at one end Closed blind pipe, inner tube is from the tail portion of outer tube insertion outer tube, only except open end dew outer tube, the tail end of outer tube and opening for inner tube Mouth end lateral wall closure connection, forms inside and outside cannula structure, and the other end of outer tube is open end；Heater element is sleeved on inner tube It on lateral wall, and can be slid relative to inner tube, the connecting terminal 5 of heater element is drawn from the open end of outer tube, described Heater element is electromagnetic heating coil, resistance wire class heating coil, carbon film fever casing, charcoal trichite thermal sleeve, infrared emission stone One of English casing is equipped with insulating layer between heater element and inner tube lateral wall；Flange is connected on the open end of outer tube Disk 5.In fig 2, the heater element in electric heating pipe fitting uses electromagnetic heating coil；In fig. 3, in electric heating pipe fitting Heater element uses resistance wire class heating coil.

The utility model is used in electric water-heating apparatus as heating element, referring to attached drawing 3, by taking boilers heated electrically as an example, this reality It is mounted in the water tank 6 of boilers heated electrically with the novel ring flange by outer tube open end, specific mounting means is: in water storage Electric heater mounting hole is provided on the side wall of case, the electric heater 7 of the utility model is outside the electric heater mounting hole of water tank Portion is inserted into water tank, and by ring flange and water tank airtight connection, and the axis of electric heater inner tube is parallel to the horizontal plane, More than one electric heater can be connected on water tank；The outer tube open end of the utility model can not also mounting flange Disk, but make the electric heater mounting hole airtight connection on the open end of outer tube and the side wall of water tank by the way of welding. The water storage box body is thermal-insulating body, it may be assumed that water storage box body is by liner, shell and the insulating layer being clipped between liner and shell It constitutes, is equipped with manhole 8, instrument installing port 9 at the top of water tank, be equipped with overflow port 10, boiler water filling on the top of water tank Mouth 11, hot water outlet 12 are equipped with water return outlet 13, sewage draining exit 14 in the bottom of water tank.

In practical application, being directed to specific heater element, mating corresponding controller is answered.Currently, in the utility model The heater element and its matched controller, there is sale in the market, such as: the resistance wire class for electrically heated boiler heats Coil and its controller, controller are the intelligent controller of computerized version, have full Chinese band back-light liquid crystal display screen, have abundant Display function, by the operating status of boiler and collected circulating pump working condition, heater working condition, furnace coolant-temperature gage, Water position status, current time, warning message etc. are accurate and visual to be shown.Operation setting is carried out using controller keyboard, and Various adjustment parameters can be checked, set and modified, realize human-computer dialogue, it is understandable, easy to learn, easy to remember, it is simple, convenient.Control The built-in digital dock of device band, system can be by user's requirements, and 4 periods arbitrarily set the open and close machine time in one day, save Electrical loss reduces boiler cost of use.And there is the multinomial protection function such as boiler water shortage, overtemperature, short circuit, electric leakage, phase shortage, overcurrent Can, so that boiler operatiopn is more stable, safety.

When the utility model is used, the water level in the water tank of boilers heated electrically necessarily is greater than the electric heating of the utility model The installation site of device, it may be assumed that all electric heaters must submerge, must not dry combustion method.Its working principle is that: in water tank plus Water in place after, water is filled in the lumen of electric heater inner tube, the water in inner tube lumen is mutually merged with the water of water tank, When heater element heating power or when the water in inner tube lumen being made by electromagnetic eddy to heat up, due to there is thermal energy, in inner tube lumen Water setting in motion, the high water of temperature from the open end of inner tube flow out, the low water of temperature from the open end of inner tube flow into, with water storage The water of case forms free convection circulation.With the persistent fever of heater element, water temperature is constantly increased, inner tube lumen and water tank The convection circulation speed of water can be getting faster, and with boiling, in the state that fast Natural Circulation is increased in this boiling, inner tube pipe Cavity wall non flouling behaviour can not condense, as scum although also having scale to be precipitated from water during heating on tube wall Meeting deposited bottom due to circulation is brought in water tank, while the impurity in water can also deposit to the bottom of storage tank, periodically pass through The sewage draining exit of the bottom of storage tank is discharged.The utility model mainly relies on inner tube to exchange heat, but outer tube also can be to water storage Water transport thermal energy in case forms composite heating.Due to the special structure design of the utility model, so that inner tube lumen wall Non flouling behaviour, and free convection circulation can be formed with the water of water tank, not only heat transfer rate is fast, but also safeguards simple, use Service life greatly increases.

Claims (4)

1. a kind of single port Horizontal single-pipe Natural Circulation Combined type electric heater, including inner tube, outer tube, heater element, feature Be: inner tube be the closed blind pipe of the other end open at one end, inner tube from the tail portion of outer tube insertion outer tube in, only open end dew outer tube it Outside, the tail end of outer tube and the open end lateral wall of inner tube closure connect, and form inside and outside cannula structure, and the other end of outer tube is to open Mouth end；Heater element is sleeved on inner tube lateral wall, and the connecting terminal of heater element is drawn from the open end of outer tube.

2. single port Horizontal single-pipe Natural Circulation Combined type electric heater according to claim 1, it is characterized in that: the hair Thermal element can be slid relative to inner tube.

3. single port Horizontal single-pipe Natural Circulation Combined type electric heater according to claim 1, it is characterized in that: the hair Thermal element is electromagnetic heating coil, resistance wire class heating coil, carbon film fever casing, charcoal trichite thermal sleeve, infrared emission quartz One of casing.

4. single port Horizontal single-pipe Natural Circulation Combined type electric heater according to claim 1, it is characterized in that: generating heat Insulating layer is equipped between element and inner tube lateral wall.