CN87213030U - Phase change type domestic heater - Google Patents

Abstract

The utility model discloses a novel phase change electric heater, comprising heat radiating fins, upper and lower connecting boxes, an electric heating membrane, working substances and accessories. Phase change working substances are heated and phase-changed by the electric heating membrane into working substance steam in a closed system, the steam is entered into the upper connecting box along a pipeline in a heat emitter, and a large quantity of latent heat of vaporization is discharged by the steam which is condensed into liquid which is flowed back to the lower box via a return pipe in the process of outward heat radiation of the heat radiating fins. Peculiar phase change internal circulation new technology is adopted by the novel phase change electric heater, and the new process of heat radiation modus, heat radiating fins combined by copper and aluminum with good quality and a screen printing electric heating membrane is adopted. The utility model has the advantages of clear principle, novel structure, small size, light weight and fast heat radiation. The utility model can be extensively used for the public spaces such as families, elevator halls, offices, etc.

Description

Phase change type domestic heater

The invention belongs to family expenses electric heating field, and relevant with the phase-change heat-exchange technology.

Existing Electric heater kind is a lot, generally can be divided into three major types: 1, electric warm braw heating device is directly to add hot-air by heating wire, with blower fan hot-air is blown out, and makes indoor air flows reach the heating purpose.Its advantage is indoor quick heating; Shortcoming is that mechanical loss is big.2, conduction oil heating device is to fill with a kind of conduction oil (leaving a little swollen space of rising) in the radiator of sealing, and heat-conducting oil heating, oil by Natural Circulation, is passed to fin to heat and added hot-air raising indoor temperature in system by heating wire.Its advantage is not have machinery loss (electric energy all converts heat energy to), and shortcoming is that conduction oil is more expensive, and aging easily, thermal capacitance is bigger, and heat transfer coefficient is little.3, the heat pipe heating device is that hot pipe technique is applied to a kind of new product on the Electric heater, and its main feature is that the conduction oil in the former heating device is changed into a kind of low boiling working fluid, utilizes the principle of gravity assisted heat pipe to reach the heating purpose.Its advantage is: thermal diffusivity is good, and thermal capacitance is little, does not have the machinery loss; Shortcoming is: the manufacturing process complexity, and the cost height, the life-span is short.

The utility model improves with regard to the problem that above-mentioned three class heating devices exist, and has proposed a kind of phase transformation internal circulation heat-exchanging new technology, and has adopted copper aluminium composite material and serigraphy Electric radiant Heating Film new technology, thereby possessed the advantage of above-mentioned three class heating devices.

Electric heater of the present utility model is by upper header (2), liquid back pipe (3), and lower collecting box (4), fin (5), Electric radiant Heating Film critical pieces such as (6) and annex are formed.The side's of the growth bar shaped of last lower collecting box, metal is made, outside enamel, Electric radiant Heating Film is sticking multiple in the bottom of lower collecting box, is not exposed by baffle plate (7) protection.The fin two ends are one in last lower collecting box weldering, pipe inserts upper header 15 millimeter, circulation pipe is welded on the lower collecting box middle part, pipe inserts lower collecting box 20 millimeter, four jiaos of lower collecting box place is equipped with castor (8), and heating device planted agent charges into an amount of working medium (10) as organic medias such as water, alcohol and alkyl compounds.Sealing vent valve (1) is left on upper header top, fills working medium and all passes through this valve with the discharging on-condensible gas.The working medium that is filled requires compatible with metal material, and operating pressure in service is less than 2 kilograms per centimeter ²Is furnished with temperature overheating protector (9) in order to ensure work safety.(conventional temperature controller, i.e. Temperature probe control apparatus switch)

The course of work: after connecting power supply, Electric radiant Heating Film is the heating of the working medium in lower collecting box phase transformation gasification, refrigerant vapor is flushed to upper header along the fin pipeline, outwards dispelled the heat by fin and header outer wall, refrigerant vapor discharges and to be condensed into liquid (sub-fraction flows back to lower collecting box along the fin tube wall) behind the gasification latent heat and to flow back to lower collecting box by liquid back pipe and finish a working cycles.Electrical power size as required also can select for use conventional heating wire to replace Electric radiant Heating Film, and heating wire is installed in lower collecting box inside.

The utility model compared with prior art has: in light weight, multiple advantages such as thermal capacitance is little, the loss of nothing machinery, heat transfer coefficient height, especially unique design arranged in that the phase transformation internal circulation heat-exchanging is technical, principle is clear, novel structure, manufacturing process is simple, and above-mentioned effect is that prior art is incomparable.

Description of drawings:

Accompanying drawing 1 is phase transformation heating device system architecture schematic diagram:

1, vent valve 2, upper header 3, liquid back pipe 4, lower collecting box 5, fin 6, Electric radiant Heating Film 7, baffle plate 8, castor 9, overheat protector 10, working medium

Accompanying drawing 2 is the heat radiating fin structure schematic diagram:

11, fin 12, copper pipe

Embodiment:

The embodiments of the invention structure is as shown in Figure 1 and Figure 2: device adopt 8 long 400 millimeters, wide 120 millimeters, the copper aluminium heat sink compound of thick 0.5 millimeter global formation is managed and is copper material, becomes the double-wedge section, fin is an aluminium; Last lower collecting box length and width height is 400 * 100 * 30 millimeters, and thick is that 2 millimeters thin-walled steel plate is made, and circulation pipe is that the copper tube of φ 16 * 1 is welded.Electric radiant Heating Film power is between 750-800W.The device that processes is done 3 kilograms per centimeter 2 suppress leak detection, clean the back and irritate the deionized water working medium that adds additives such as suitable corrosion inhibiter, filling weight is generally the 60-80% of lower collecting box volume.Discharge on-condensible gas and sealing the heating back, can use.Also can carry out the on-condensible gas discharging second time as effect decline in using.The heating device must be set level in the use, and anti-locking apparatus tilts to cause undesired circulation.Overheat protector is controlled power switch by temperature sensor, can guarantee the safe handling of heating device.Ground such as present embodiment family, office, escalator all can use, and according to different heating requirements, make the series specification that varies in size, and are useful in multiple occasion.

Claims (4)

1, a kind of hot pipe technique is applied to the phase-change type domestic heating device of Electric heater, it is characterized in that by fin (5), upper header (2), lower collecting box (4), Electric radiant Heating Film (6), working medium (10) and overheat protector (9) are formed.

2, phase transformation heating device as claimed in claim 1 is characterized in that described fin is the Cu-Al composite strip of global formation.

3, phase transformation heating device as claimed in claim is characterized in that described working medium is organic medias such as water or alcohol, or alkyl compound.

4, phase transformation heating device as claimed in claim 1 is characterized in that Electric radiant Heating Film is compounded in the outside of enamel header, perhaps adopts heating wire to be installed in case inside.

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