CN101726117A - Solar water heater capable of using up hot water and automatically washing vacuum heat collection tube - Google Patents

Abstract

The invention discloses a solar water heater capable of using up hot water and automatically washing a vacuum heat collection tube, which belongs to the field of solar thermal utilization. The solar water heater mainly solves the problems that conventional vacuum solar water heaters always deposit old water and dirt, have deteriorative water quality, cannot completely drain off the water, and have low utilization rate of the hot water. The solar water heater is characterized in that both ends of the vacuum heat collection tube (2) of the solar water heater are opening; the solar water heater is provided with a hot water storage tank (7) and a water consumption tank (4); and the solar water heater is provided with a vacuum tube (3). When the water enters, tap water is injected into the water consumption tank (4) from a water inlet and outlet pipe (5); when the water flows out of an exhaust and overflow pipe (6), the influent is stopped; and in sunlight, the hot water in the vacuum heat collection tube (2) enters the hot water storage tank (7), low-temperature water on the bottom of the hot water storage tank (7) enters the water consumption tank (4) from the vacuum tube (3), and cold and hot water perform constant convection heat exchange. When the water is used, the water is drained from the water inlet and outlet pipe (5), and high-temperature water synchronously flows out of the vacuum heat collection tube (2) of which two ends are provided with openings, and the vacuum tube (3). The solar water heater realizes the aims of being capable of using up the hot water and automatically washing the vacuum heat collection tube through the fact that a water consumption pipe (9) drains the hot water in the hot water storage tank (7) which cannot be drained by the vacuum heat collection tube (2) and the vacuum tube (3) during a heat convection phenomenon produced by the heat exchange of the cold and hot water and water consumption.

Description

Can use up hot water and automatically washing vacuum heat collection tube solar water heater

Technical field

The invention belongs to solar energy heat utilization field, relate to and a kind ofly can use up hot water and automatically washing vacuum heat collection tube solar water heater.

Background technology

In the prior art, conventional vacuum heat collection pipe solar water heater mainly is made up of thermal storage water tank, vacuum heat collection pipe and support three parts, the structure of vacuum heat collection pipe is the glass heat-collecting vacuum tube structure that adopts an end to seal an end opening, the openend of each vacuum heat collection pipe inserts the thermal storage water tank respectively, and blind end is mutually independent and can not be communicated with, entery and delivery port all is located on the thermal storage water tank, the hot water that system can only limit to store among the thermal storage water tank with hot water, the hot water of storing in the vacuum heat collection pipe all are difficult to utilization because of discharging.As time goes on, the highest water temperature is but descending year by year under equal sunlit condition, and it is that gathering of vacuum heat-collecting inside pipe wall incrustation scale thickens and make due to its heat transmission function weakens that water temperature descends.Because the structure of existing vacuum heat collection pipe is end sealing, water is difficult to circulation therein, last a very long time, calcium magnesium electrodeposition substance in the water is at the pipe end and tube wall, accumulate over a long period, impurity in incrustation scale and the water will slowly be deposited in the vacuum heat collection pipe, and the initial good solar collecting performance of vacuum heat collection pipe will fade away.Water pipe is contained in the vacuum heat collection pipe upper tank, when water, the hot water in the vacuum heat collection pipe can not be emitted all the time, cause water quality deterioration, breed bacteria in the solar water heater, influence making full use of of solar water heater, also just reduced the dischargeable capacity of the thermal efficiency and water heater.

Summary of the invention

Provide a kind of and can use up hot water and automatically washing vacuum heat collection tube solar water heater, by changing the structure of vacuum heat collection pipe and solar water heater, adopt the vacuum heat collection pipe of dual-end, can overcome the deficiencies in the prior art, to advance, what outlet pipe was installed in the vacuum heat collection pipe bottom is all flowed out utilization with making in the system on the water tank by the hot water of solar energy heating, can make and not accumulate Chen Shui and incrustation scale in the vacuum heat collection pipe, heat energy makes full use of, avoid growing of bacterium, and the raising thermal efficiency makes the vacuum heat collection pipe solar water heater can keep efficient for a long time normal operation.The purpose of this utility model is to quicken water flowing in vacuum heat collection pipe, avoid incrustation scale at the bottom of the vacuum heat collection pipe pipe and the deposition of tube wall, when vacuum heat collection pipe absorbs heat, utilize the principle of hot water come-up, water automatically washing vacuum heat collection tube in heat transfer process in solar water heater inside.

Description of drawings

Accompanying drawing is a structural representation of the present utility model

Among the figure: 1 is water, and 2 is the vacuum heat collection pipe of dual-end, and 3 is the vacuum tube of dual-end, and 4 for to use water tank, and 5 is inlet tube and outlet tube, and 6 are exhaust, overflow pipe, and 7 is the thermal storage water tank, and 8 is support, and 9 is water pipe.

The specific embodiment

As shown in the figure, technical solution of the present invention is that existing vacuum heat collection pipe water heater structure is improved.Its feature one is that its vacuum heat collection pipe 2 both-ends are openings; Its feature two is that it has two water tanks, thermal storage water tank 7 and with water tank 4, thermal storage water tank 7 is positioned at the top of support 8, is positioned at support 8 belows with water tank 4, presses certain angle and thermal storage water tank 7 and is connected with water tank 4 by vacuum heat collection pipe 2, the vacuum tube 3 of several dual-ends arranged side by side.Its feature three is centres that vacuum tube 3 is installed in solar water heater, does not possess heat collection function.Its feature four is water pipe 9 bottoms of being installed in thermal storage water tank 7 and be connected with water tank 4.Because vacuum heat collection pipe 2 of the present invention and vacuum tube 3 both-ends are openings, thermal storage water tank 7 is inserted in the upper end, insert with water tank 4 lower end, thermal storage water tank 7 and with vacuum heat collection pipe 2, the vacuum tube 3 of water tank 4 and dual-end formed one mobile during for heat exchange by the circular passage shown in the reference arrow.During water inlet, to injecting running water,, stop into water from inlet tube and outlet tube 5 when exhaust, when overflow pipe 6 there are flowing out with water tank 4, under the irradiation of sunlight, hot water in the vacuum heat collection pipe 2 enters thermal storage water tank 7, and the water at low temperature of thermal storage water tank 7 bottoms enters with water tank 4 from vacuum tube 3, and hot and cold water is heat convection so constantly, therefore, calcium ions and magnesium ions compound in the water just is difficult to be deposited in the vacuum heat-collecting inside pipe wall, more can not be deposited in the pipe end, reduces the formation of incrustation scale.During water, discharge water from inlet tube and outlet tube 5, high-temperature water flows out simultaneously by the vacuum heat collection pipe 2 and the vacuum tube 3 of dual-end, because the mouth of pipe of vacuum tube is higher than water storage tank 7, the water in the water storage tank 7 all flows into the water in the water storage tank 7 with water tank 4 by water pipe 9.Finish by automatically washing vacuum heat collection tube in heat exchange and the water utilizing process and the purpose that can use up the water in the solar water heater.

The utility model compared with prior art, the vacuum heat-collecting in-tube fouling reduces, and avoids water quality deterioration in the solar water heater, and the vacuum heat collection pipe of prolongation service life is arranged, and forever protects the characteristics such as result of use, especially the relatively poor region of water quality is had more superiority. Because inlet tube and outlet tube is installed in the water tank of using of bottom, is conducive to the combination of building.

Claims (1)

1. can use up hot water and automatically washing vacuum heat collection tube solar water heater, form by the vacuum tube support of the vacuum heat collection pipe of the thermal storage water tank with exhaustion spill, dual-end, dual-end and with water tank.It is characterized in that: its feature one is that its vacuum heat collection pipe 2 both-ends are openings; Its feature two is that it has two water tanks, thermal storage water tank 7 and with water tank 4, thermal storage water tank 7 is positioned at the top of support 8, is positioned at support 8 belows with water tank 4, presses certain angle and thermal storage water tank 7 and is connected with water tank 4 by vacuum heat collection pipe 2, the vacuum tube 3 of several dual-ends arranged side by side.Its feature three is both sides that vacuum tube 3 is installed in solar water heater, does not possess heat collection function.Its feature four is water pipe 9 bottoms of being installed in thermal storage water tank 7 and be connected with water tank 4.

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