CN2485595Y

CN2485595Y - Solar water heater with double water tanks

Info

Publication number: CN2485595Y
Application number: CN01217310U
Authority: CN
Inventors: 厉红
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-21
Filing date: 2001-01-21
Publication date: 2002-04-10
Anticipated expiration: 2011-01-21

Abstract

The utility model relates to a double water tank solar water heater, with the structural key points that an upper water tank and a lower water tank are connected by a group of through type vacuum tubes, and a group of elbow tubes used for connecting the upper and lower water tanks are arranged at the back of a vacuum heat collecting tube, speeding up the exchange speed of water and heat in the water tank, increasing the thermal efficiency, improving the stability of the solar water heater and reducing the fouling in the internal wall of the vacuum tube, the utility model is a new structural form of the prior solar water heater.

Description

Two tank solar water heaters

The utility model belongs to commodity, is specifically related to the structure of a kind of pair of tank solar water heater.

Solar water heater belongs to clean energy resource, because it is simple in structure, and not consumes energy quick for installation, easy to use, very big development had been arranged in recent years at home, but also there is following defective in the structure of prior solar water heater:

1, unreasonable structure.

A, vacuum tube are end openings, and the water in the end closure, vacuum tube is put forever, clean as manually not pulling down pouring, and the water in the vacuum tube is throughout the year, even what years are all in pipe.If water heater for a long time need not (as winter), then the water in the vacuum tube can go bad, and is unhygienic.Therefore before using annual spring, must clear up maintenance or constantly go up water and discharge water, to dilute the addle in the vacuum tube.

B, since vacuum tube in water can not in time change, rinse well, the inside pipe wall fouling, these dirty thermal resistances are big, the thermal resistance of the thick incrustation scale of 1mm is equivalent to the thermal resistance of 40mm steel plate.How long have more than is needed a new regular solar water heater is, and heat absorption capacity descends greatly, makes its effect beat take-off greatly.

C, heavy water tank are at the top, and the water heater center of gravity is too high, so that the security of fears are entertained that water heater, therefore many users get up its lower margin with concrete casting.

2, heat transfer property is poor

After water in the vacuum tube absorbed solar energy, temperature raise because the water in the pipe do not flow, the water of high temperature mainly by self with heat conducting form the heat transferred water in water tank of self, the water in the water tank is slowly heated up.In addition, water upwards flows into water tank because of the heat absorption volumetric expansion in the pipe, and simultaneously, the case inner cold water is low because of self temperature, density is big, under the self gravitation effect, flows to vacuum tube, and the hot water or cold water carries out heat transmission by flowing relatively of this microcirculation form.These two kinds biographies, heat-conducting mode immixture the water of haveing suffered in the water tank is constantly heated up, but programming rate are too slow.

The purpose of this utility model is: design a kind of pair of tank solar water heater, it can overcome the defective that existing water heater exists preferably.

The purpose of this utility model is achieved in that

The main water box of solar water heater is positioned at its top, in its bottom an auxiliary lower header is arranged, one group of vacuum tube one end connection main water box that two ends connect, and the other end connects auxiliary lower header, in the lower header bottom one water nozzle is arranged, and the upper hose interface is arranged on the upper water box; Blast pipe is arranged at the top at upper water box two ends, and wherein the blast pipe of an end connects threeway, as the spilling water mouth of pipe.Except that connecting, also connect between upper and lower two water tanks with one group of bend pipe with true pipe.

Its operation principle is: the water in the vacuum tube absorbs solar energy, and temperature rises, and density descends, and water is to the upper reaches.And the cold water temperature in the bend pipe is low, and density is big, and water is to dirty.This pressure differential is the hydrodynamic head of water circulation, and the size of this head depends on the temperature difference of two Guan Zhongshui, i.e. density contrast.The temperature difference is big more, and the water circulation is fast more.

The utility model has following advantage and effect:

1, all emptying of the water in the water heater does not have ponding.2, water on the upper water box, the lower header water outlet.3, washed immediately during the upper and lower water of vacuum tube, inwall is clean, and comparatively speaking, non flouling behaviour keeps solar energy-absorbing capacity of solar energy efficiently.4, compare with former water heater, center of gravity moves down, and stability is improved, and safety problem is more guaranteed.5, use Maintenance free for a long time.6, because the hydrodynamic head of Natural Circulation is arranged, water constantly upwards flows in vacuum tube, and the vacuum tube inwall is constantly cooled off, and solar energy-absorbing capacity of solar energy is strong, need not to make the so big volume of regular solar water heater.7, upper and lower two water tanks, water capacity is big, need not to resemble so the regular solar to add water tank on the water tank 8, stable gravity center is qualitative good, safe again.9, because of inwall is clean, safe, so long service life.

Provide the utility model accompanying drawing below:

Fig. 1 is the utility model structural representation

Among the figure: lower header bridge piece, 5 filling pipe ends, 6 blast pipes, 7 hot water mouths, 8 gaps on 1 upper water box, 2 through vacuum tubes, 3 lower headers, 4.

Introduce the utility model implementation method below in conjunction with accompanying drawing: through vacuum tube 2 upper ends connect upper water box 1, the lower end connects lower header 3, between upper water box 1 and lower header 3, be connected one group of bend pipe 4 that lower header is communicated with, hot water outlet 7 is connected in lower header 3 bottoms, cold water filling pipe end 5 is connected in upper water box 1 bottom, and exhaust outlet 6 and gap 8 are positioned at upper water box 1 top.

After running water is filled with lower header 1,3 toward filling pipe end 5, redundance can overflow from gap 8, through vacuum tube 2 forms thermal convection current under solar radiation, because the effect of bend pipe 4, the hot and cold water that will speed up lower header 1,3 exchanges, make two water tanks all become hot water at last, the user only need open hot-water switch, and hot water can flow out from hot water outlet 7.

Claims

1, a kind of pair of tank solar water heater is made up of water tank (1) and vacuum heat collection pipe (2), it is characterized in that: vacuum heat collection pipe (2) is through for two ends, and the one end connects upper water box (1) other end and connects lower header (3).

2, according to a kind of pair of tank solar water heater of claim 1, it is characterized in that: have one group of bend pipe to connect upper water box (1) and lower header (3) at the rear portion of vacuum heat collection pipe (2).

3, according to a kind of pair of tank solar water heater of claim 1 or 2, it is characterized in that: hot water outlet 7 is positioned at the bottom of lower header (3).