WO2021253313A1

WO2021253313A1 - Energy-saving solar water heater

Info

Publication number: WO2021253313A1
Application number: PCT/CN2020/096742
Authority: WO
Inventors: 王强; 宋帅迪; 刘�文
Original assignee: 南通大学
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-12-23

Abstract

Disclosed is an energy-saving solar water heater. The energy-saving solar water heater comprises a solar heat collecting pipe, a water tank, a hot water conveying pipe and a heat preservation barrel. The lower end of the hot water conveying pipe is connected to a water inlet of the heat preservation barrel, and a booster pump is installed on a water outlet pipe of the heat preservation barrel; and a two-position three-way electromagnetic valve is arranged at the upper end of the hot water conveying pipe, and the two-position three-way electromagnetic valve is provided with a water inlet in communication with a water outlet of the water tank, a water outlet in communication with the water inlet of the heat preservation barrel and an air inlet in communication with ambient air. The heat preservation barrel is additionally arranged for storing hot water for users to use. In a normal state, no water is present in the hot water conveying pipe, intermittent water injection from the water tank to the heat preservation barrel is achieved by means of state switching of the two-position three-way electromagnetic valve at the upper end of the hot water conveying pipe; and after water discharging of the water tank is completed, the upper end of the hot water conveying pipe is in communication with ambient air, and hot water in the pipe flows into the heat preservation barrel under the action of gravity, such that the hot water in the pipe is effectively used, and hot water waste is avoided. In the normal state, no water is present in the hot water conveying pipe, such that the problems whereby energy waste is caused by the long-time retention of hot water in the pipe, and the hot water conveying pipe is prone to frost cracking in winter are solved.

Description

Energy-saving solar water heater

Technical field

The invention relates to an energy-saving solar water heater, which belongs to the technical application field of energy-saving and emission reduction.

Background technique

At present, solar water heaters are water heater equipment that our country vigorously promotes popularization. Compared with other water heaters, solar water heaters not only save conventional energy, do not produce any pollutants or wastes, and can efficiently produce hot water, but also have almost zero operating costs. Long-term use has good economic benefits and a long service life, which is a practical response. my country's call for building an energy-saving and environment-friendly society. Solar water heaters have many advantages, but even so, it also has some technical shortcomings that limit its development.

In order to make better use of energy, solar water heaters are generally installed on the roof, and the hot water delivery pipes need to extend from the roof to the room. In the process of use, the cold water stored in a large number of pipes will be directly discharged, causing a waste of water resources; while the hot water flowing through the long pipes will cause excessive heat loss and lower water temperature; after use, it will stay in The hot water in the pipeline cannot be used, and waste is produced again; and in winter, the pipeline exposed outdoors is easy to freeze and crack.

technical problem

The purpose of the present invention is to overcome the above-mentioned problems of the prior art and propose an energy-saving solar water heater that will not cause waste of cold water and hot water in the pipeline.

Technical solutions

In order to achieve the above objective, the energy-saving solar water heater proposed by the present invention includes: a solar heat collection tube, a water tank and a hot water delivery pipe arranged from top to bottom. The water inlet of the heat preservation barrel and the outlet pipe of the heat preservation barrel are equipped with a booster pump; the upper end of the hot water delivery pipe is provided with a two-position three-way solenoid valve, and the two-position three-way solenoid valve has a water inlet communicating with the water outlet of the water tank , The water outlet connected with the water inlet of the insulation barrel, and the air inlet connected with the atmosphere.

Beneficial effect

The invention adds a heat preservation barrel to store hot water for users to use. In the normal state, there is no water in the hot water delivery pipe. By switching the state of the two-position three-way solenoid valve at the upper end of the hot water delivery pipe, the water tank can be intermittently filled with water to the insulation barrel. The hot water in the pipe flows into the insulation barrel under the action of gravity, which effectively utilizes the hot water in the pipe and avoids waste of hot water. Since there is no water in the hot water delivery pipe under normal conditions, it also solves the problem of energy waste caused by the hot water staying in the pipe for a long time, and the hot water delivery pipe is easy to be frozen and cracked in winter.

Description of the drawings

The present invention will be further explained below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the energy-saving solar water heater of the present invention.

The reference numerals in the figure are as follows.

1-Solar collector tube, 2-Water tank, 3-Hot water delivery pipe, 4-Insulation barrel, 5-Two-position three-way solenoid valve, 6-Outlet pipe, 7-Booster pump, 8-Cut off solenoid valve, 9- Bracket.

Embodiments of the present invention

The present invention will be further described below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, the energy-saving solar water heater of this embodiment mainly includes: a solar heat collection tube 1 (using a vacuum heat collection tube), a water tank 2, a hot water delivery tube 3 arranged from top to bottom, and a heat preservation barrel 4 located indoors. The solar collector tube 1 and the water tank 2 are fixed on the roof by a bracket 9. The lower end of the hot water delivery pipe 3 is connected to the water inlet of the insulation barrel 4, the water outlet pipe 6 of the insulation barrel 4 is installed with a booster pump 7, and the hot water supply is realized through the insulation barrel 4.

As shown in Figure 1, the upper end of the hot water delivery pipe 3 is provided with a two-position three-way solenoid valve 5. The two-position three-way solenoid valve 5 has a water inlet communicating with the water outlet of the water tank 2, and an outlet communicating with the water inlet of the thermos 4 Nozzle, and the air inlet that communicates with the atmosphere.

The two-position three-way solenoid valve 5 has two status positions.

In the first state, the water inlet of the two-position three-way solenoid valve 5 is connected to the water outlet, and the air inlet is closed. At this time, the water bucket of the solar water heater starts to discharge hot water, which is delivered into the thermal insulation bucket 4 through the hot water delivery pipe 3.

In the second state, the water inlet of the two-position three-way solenoid valve 5 is closed, and the air inlet is connected to the water outlet. At this time, the bucket of the solar water heater stops discharging hot water, the upper end of the hot water delivery pipe 3 is in communication with the atmosphere, and the hot water in the pipe falls into the insulating bucket 4 under its own weight.

In this embodiment, the lower end of the hot water delivery pipe 3 is provided with a cut-off solenoid valve 8 to block the hot air in the insulation barrel from being discharged to the outside through the hot water delivery pipe. The hot water delivery pipe 3 is wrapped with an insulation layer to further prevent heat loss.

In order to satisfy that the solar water heater can be used normally when the light conditions are not good or the water temperature in the insulation barrel is too low, an electric heater can be provided in the insulation barrel. The electric heater heats the water in the heat preservation barrel to meet the needs of use and improve the applicability of the solar water heater in rainy days or in winter. When the light conditions are not ideal, the water in the water tank of the water heater can reach a certain temperature (for example, 25°C), and this part of the water flows into the insulation barrel for further heating, which can meet the needs of higher water temperature (for example, 40°C). Energy is effectively used and energy consumption is reduced.

When the solar water heater is in a normal state, the water outlet of the water tank is in a closed state, and hot water is provided through a heat preservation barrel. When the water level in the insulation barrel drops to a certain height, the two-position three-way solenoid valve is activated to make the hot water in the water tank fall into the insulation barrel through the pipe. After a set time (for example, 10s), the two-position three-way solenoid valve Switch to the original state, the water outlet of the water tank is closed, the upper end of the hot water delivery pipe is open to the atmosphere, and the remaining hot water in the pipe flows into the insulation barrel under its own weight. Therefore, this part of the hot water is effectively used and no energy is wasted. When the water level in the insulation barrel drops to a certain height, the water release mode is turned on again, and the cycle is repeated, and the effective use of hot water can be realized through intermittent water replenishment.

In addition to the above-mentioned embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.

Claims

An energy-saving solar water heater, comprising: a solar heat collecting pipe (1), a water tank (2) and a hot water delivery pipe (3) arranged from top to bottom. The lower end of the water delivery pipe (3) is connected to the water inlet of the insulated barrel (4), the outlet pipe (6) of the insulated barrel (4) is equipped with a booster pump (7); the upper end of the hot water delivery pipe (3) is provided with two -Position three-way solenoid valve (5), the two-position three-way solenoid valve (5) has a water inlet communicating with the water outlet of the water tank (2), a water outlet communicating with the water inlet of the insulation barrel (4), and communicating with the atmosphere Air intake.
The energy-saving solar water heater according to claim 1, characterized in that: a cut-off solenoid valve (8) is provided at the lower end of the hot water delivery pipe (3).
The energy-saving solar water heater according to claim 1, characterized in that: the two-position three-way solenoid valve (5) has two state positions: in the first state, the two-position three-way solenoid valve (5) enters The water inlet is connected to the water outlet, and the air inlet is closed; in the second state, the water inlet of the two-position three-way solenoid valve (5) is closed, and the air inlet is connected to the water outlet.
The energy-saving solar water heater according to claim 1, characterized in that: the hot water delivery pipe (3) is wrapped with an insulation layer.
The energy-saving solar water heater according to claim 1, wherein the solar heat collection tube (1) is a vacuum heat collection tube.
The energy-saving solar water heater according to claim 1, characterized in that: the solar heat collection tube (1) and the water tank (2) are fixed on the roof of the building through a bracket (9).
The energy-saving solar water heater according to claim 1, characterized in that the heat preservation barrel (4) is located indoors.
The energy-saving solar water heater according to claim 1, characterized in that: an electric heater is provided in the heat preservation barrel (4).