CN201377920Y

CN201377920Y - Solar-energy water heater

Info

Publication number: CN201377920Y
Application number: CN200920051604U
Authority: CN
Inventors: 何德癸
Original assignee: SHENZHEN DARSAN DINGCHENG ELECTRIC CO Ltd
Current assignee: SHENZHEN DARSAN DINGCHENG ELECTRIC CO Ltd
Priority date: 2009-02-24
Filing date: 2009-02-24
Publication date: 2010-01-06
Anticipated expiration: 2019-02-24

Abstract

The utility model discloses a solar-energy water heater, which comprises a plurality of heat tubes inserted into a water box. Each heat tube is a vacuum tube with two sealed ends; the heat tube is partially filled with a low-temperature boiling-point working medium; and two ends of the heat tube are a heat absorbing end and a condensing end, wherein the section of the heat absorbing end is oval, and the section of the condensing end is round. In the product, the section of the heat absorbing is designed into an oval, which indicates the principle that the long shaft of an oval tube corresponds to the end projecting area, so that under the same weight condition, the projection area of an oval tube is increased by 20 percent to 30 percent compared with that of the round tube, in other words, the heat collecting area is increased by 20 percent to 30 percent, however the raw materials are not increased; and since the heat tube is filled with low-temperature boiling-point working medium, the heat conducting speed of the heat tube is further increased, as is equivalent to increase the dense-arrangement strength of heat tube and enhance the heat collecting capacity in unit area, and in this case, the heat efficiency of the solar-energy water heater is improved, and the effect of achieving maximum results with little effort is achieved.

Description

A kind of solar water heater

Technical field

The utility model relates to a kind of solar water heater, particularly a kind of elliptic heat pipe solar water heater.

Background technology

At present solar water heater on the market all is to insert glass vacuum thermal-pipe in water tank, leakes water in the glass tube, fault such as leak that easily causing breaks.A kind of new heat pipe formula heat pipe is the pipe of one two end sealing, inside vacuumizes, the low temperature boiling point working medium about 20%～25% is filled in the centre, after the heating end heat absorption, working medium is vaporized rapidly, enter the other end of heat pipe immediately, steam is emitted heat after condensation, and worker quality liquid is back to heat absorbing end continuation heat absorption after the condensation under the gravity effect, circulation so repeatedly, heat pipe constantly passes to the other end with heat from an end, utilizes this principle, and heat pipe is absorbed heat and heat-transfer character fast, be applied to and absorb solar radiation heat energy, the heat release that constantly circulates is repeatedly heated cold water in the water tank rapidly, reaches the purpose of efficiently utilizing solar energy.

It is circular that but existing heat pipe-type heat pipe is generally, the height of water temperature depends on that the daylighting area of heat pipe and moisture storage capacity are under same water tank volume in the solar water heater water tank generally speaking, daylighting area increases, water temperature heats up fast more in the water tank, therefore need increase heat pipe quantity for the Heat-collecting effect that obtains, thereby increased production cost, thereby be difficult to meet people's desirable requirement.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of solar water heater of effective raising thermal efficiency.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of solar water heater, it comprises some heat pipes that insert in the water tank, described heat pipe is the vacuum tube of two ends sealing, be filled with part low temperature boiling point working medium in the heat pipe, the two ends of described heat pipe are respectively heat absorbing end and condensation end, the heat absorbing end cross section of described heat pipe is oval, and the cross section of described condensation end is circular;

As improvement of the technical scheme, be provided with the imbibition core in the heat absorbing end of described heat pipe;

As further improvement in the technical proposal, described heat pipe is fixed in the glass tube with vacuum outward.

The beneficial effects of the utility model are: this product is with the Cross section Design ovalisation of the heat absorbing end of heat pipe, its principle is the major axis corresponding end projected area of elliptical tube, under same weight condition, increase 20%～30% than the diameter projected area of making pipe, in other words, equaled to increase by 20%～30% collector area, and raw material do not increase, owing to be filled with low temperature boiling point working medium in the pipe, thereby more accelerated Heat Transfer of Heat Pipe on Heat Pipe speed, thereby be equivalent to strengthen the solid matter intensity of heat pipe, strengthened the heat-collecting capacity of unit are, thereby improved the thermal efficiency of solar water heater, reach the effect of getting twice the result with half the effort, owing to do not leak water in the vacuum tube, therefore after single heat pipe damaged, water heater still can normally carry out work.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a heat pipe structure schematic diagram of the present utility model.

The specific embodiment

With reference to Fig. 1, a kind of solar water heater, it comprises some independent heat pipes 1 that insert in the water tank, described heat pipe 1 is the vacuum tube of two ends sealing, is filled with part low temperature boiling point working medium 2 in the heat pipe 1, guarantees also not bursting by freezing under the very low state of environment temperature.The two ends of described heat pipe 1 are respectively heat absorbing end 11 and condensation end 12, and heat absorbing end 11 cross sections of described heat pipe 1 are oval, and the cross section of described condensation end 12 is circular.

In order to guarantee that low temperature boiling point working medium 2 rests in the heat absorbing end 11, can in the heat absorbing end 11 of described heat pipe 1, be provided with imbibition core 3, certainly also the design of rack of solar water heater inclination angle can be 45 degree in design is provided with, condensation end working medium can be utilized the gravity reflux heat absorbing end, can not establish the imbibition core, heat pipe structure is simpler.Described heat pipe 1 is fixed in the glass tube with vacuum 4, during use it is directly inserted in the water tank and get final product, this design makes does not have water in the glass tube with vacuum, has eradicated the shortcoming that the thermal efficiency is descended because of the fouling of leaking water, and has solved the aging and shortcoming of leaking of bombing or silica gel.Can certainly not adopt the form of glass tube with vacuum 4, and directly be made into the heat-pipe flat-plate type solar water heater also can, this design can also reduce product cost.

This product is with the Cross section Design ovalisation of the heat absorbing end 11 of heat pipe 1, its principle is the major axis corresponding end projected area of elliptical tube, under same weight condition, increase 20%～30% than the diameter projected area of making pipe, in other words, equaled to increase by 20%～30% collector area, and raw material do not increase, owing to be filled with low temperature boiling point working medium 2 in the pipe, thereby more accelerated Heat Transfer of Heat Pipe on Heat Pipe speed, thereby be equivalent to strengthen the solid matter intensity of heat pipe, strengthen the heat-collecting capacity of unit are, thereby improved the thermal efficiency of solar water heater, reach the effect of getting twice the result with half the effort, thereby guarantee that water heater still can normally carry out work after single heat pipe 1 damages.

Claims

1. solar water heater, it is characterized in that: comprise the some heat pipes (1) that insert in the water tank, described heat pipe (1) is the vacuum tube of two ends sealing, be filled with part low temperature boiling point working medium (2) in the heat pipe (1), the two ends of described heat pipe (1) are respectively heat absorbing end (11) and condensation end (12), heat absorbing end (11) cross section of described heat pipe (1) is oval, and the cross section of described condensation end (12) is circular.

2. a kind of solar water heater according to claim 1 is characterized in that: be provided with imbibition core (3) in the heat absorbing end (11) of described heat pipe (1).

3. a kind of solar water heater according to claim 1 is characterized in that: described heat pipe (1) is fixed in the glass tube with vacuum (4).