CN103712356B - A kind of vacuum tube of solar water heater - Google Patents

Abstract

The invention relates to the field of solar water heaters, in particular to a vacuum tube of a solar water heater, comprising: a cover glass tube and an inner glass tube, the cover glass tube and the inner glass tube are two concentric glass tubes, and the gap between the cover glass tube and the inner glass tube is It is a vacuum, and the inside of the inner glass tube is provided with a vertical partition that divides the inner glass tube into two parts, the left part and the right part. The left part and the right part are connected through the pressure valve installed at the bottom of the vertical partition; The bottom of the cover glass tube; a vibration cleaning device, which includes a gel ball, a high-pressure water pump and a discharge pipe. The gel ball is placed at the water outlet of the high-pressure water pump, and the water outlet of the high-pressure water pump is connected to the upper end of the inner glass tube. The glue ball enters the inner glass tube driven by the water pressure of the high-pressure water pump, and constantly hits the inner wall of the inner glass tube, and the discharge pipe is connected to the lower end of the inner glass tube. The invention provides a vacuum tube of a solar water heater which prevents cold water from entering, prevents the tube from bursting, and simultaneously removes scale in the tube easily.

Description

A vacuum tube for a solar water heater

technical field

The invention relates to the field of solar water heaters, in particular to a vacuum tube of the solar water heater.

Background technique

Today, when the global energy situation is tense and climate warming seriously threatens economic development and people's life and health, all countries in the world are seeking new energy alternative strategies in order to achieve sustainable development and gain an advantage in future development. Solar energy has become the focus of attention due to its obvious advantages such as cleanliness, continuous flow, and safety. In the development of the solar energy industry, the heat conversion technology of solar water heaters is undoubtedly the most mature, but the heating method has the following problems: on the one hand, when there is no water in the vacuum tube, once cold water enters, there is a problem of blowing the tube; on the other hand , The heat of the vacuum tube is very large, and scale is easy to appear, which affects the heating effect.

Contents of the invention

Aiming at the above-mentioned technical problems, the present invention designs and develops a vacuum tube for solar water heaters. The purpose is to provide a vacuum tube for solar water heaters that prevents cold water from entering, prevents the tubes from blowing up, and at the same time, the scale in the tubes is easy to remove.

The technical scheme provided by the invention is:

A vacuum tube for a solar water heater, comprising:

A cover glass tube and an inner glass tube, the cover glass tube and the inner glass tube are two concentric glass tubes, the space between the cover glass tube and the inner glass tube is a vacuum, and a vertical partition is arranged inside the inner glass tube The vertical partition divides the inner glass tube into two parts, the left part and the right part. The left part and the right part communicate through the pressure valve installed at the bottom of the vertical partition, and the left part communicates with the solar energy through the first valve. The water tank of the water heater is connected, the right part is connected with the heater connected to the lower end of the solar water heater through the second valve, the upper end of the heater is provided with a third valve, and the outer surface of the inner glass tube is coated with a solar selective absorption coating; A motor, which is arranged at the bottom of the cover glass tube, drives the rotation of the cover glass tube;

Vibration cleaning device, which includes gel beads, a high-pressure water pump and a discharge pipe, the gel beads are placed at the water outlet of the high-pressure water pump, and the water outlet of the high-pressure water pump is connected to the upper end of the inner glass tube , the gel ball enters the left or right part of the inner glass tube driven by the water pressure of the high-pressure water pump, and constantly hits the inner wall of the inner glass tube, and the discharge pipe is connected to the inner glass tube the lower end of the glass tube;

Wherein, any part of the left or right part of the inner glass tube stores water, and the other part is a channel for hot steam. The pressure valve opens when the pressure of the hot steam reaches a predetermined value, and the hot steam passes through the The gas-liquid separator enters the channel of hot steam and heats the water in the water tank; when the hot steam in the channel is heated for a predetermined time, the rotating motor rotates to drive the left and right parts of the inner glass tube to exchange positions, and the high-pressure water pump The water outlet of the water outlet is connected with a part of the inner glass tube that stores water, and the gel balls are driven by the water pressure to continuously hit the inner wall of the inner glass tube, and the impurities in the knocked water adhere to the surface, and the gel balls Discharge from the discharge tube at the lower end of the inner glass tube.

Preferably, in the vacuum tube of the solar water heater, the gel beads are polyacrylamide gel beads or sodium alginate gel beads.

Preferably, in the vacuum tube of the solar water heater, the diameter of the gel ball is 3/8-2/5 of the diameter of the inner glass tube.

Preferably, in the vacuum tube of the solar water heater, the water-stored part of the inner glass tube is always set towards the sun, while the hot steam channel is always on the side facing away from the sun.

In the vacuum tube of the solar water heater according to the present invention, when a part of the inner glass tube storing water is heated to a predetermined temperature, the hot steam generated in the tube will open the pressure valve at the bottom of the vertical partition in the inner glass tube, and heat The steam enters the channel of hot steam through the gas-liquid separator connected with the pressure valve, and heats the water in the water tank. At this time, the first valve of the inner glass tube and the third valve at the upper end of the heater are both closed, and the second When the valve is opened, cold water will not enter the left and right parts of the inner glass tube, which can not only avoid the mixing of cold water and hot water, causing part of the water to be reheated, but also prevent cold water from directly entering the hot steam channel, effectively avoiding the phenomenon of tube explosion happened. When the hot steam in the channel is heated for a certain period of time, the rotating motor rotates to drive the left and right parts of the inner glass tube to exchange positions, the water outlet of the high-pressure water pump communicates with a part of the inner glass tube that stores water, and the gel beads Driven by water pressure, it enters the inner glass tube and continuously hits the inner wall of the inner glass tube. The discharge pipe at the lower end of the inner glass tube is discharged, and at this time the valve on the upper part of the original hot steam channel is opened, and the water in the water tank flows into the original hot steam channel under the action of gravity potential energy and is heated. It is set against the sun, so it will not absorb a lot of solar energy. Even if the cold water in the water tank flows in, due to the preheating effect of the previous hot steam, it will not cause the tube to explode due to the excessive temperature difference. Such circulation realizes the anticipation that the vacuum tube can not only absorb solar energy to heat the water in the water tank, but also remove the scale in the vacuum tube in time, and improve the heating effect of the vacuum tube.

Description of drawings

Fig. 1 is a structural schematic diagram of a vacuum tube of a solar water heater according to the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figure 1, the present invention provides a vacuum tube for a solar water heater, comprising:

A cover glass tube 1 and an inner glass tube 2, the cover glass tube and the inner glass tube are two concentric glass tubes, the space between the cover glass tube and the inner glass tube is a vacuum, and the inside of the inner glass tube is provided with a vertical Straight partition 4, the vertical partition divides the inner glass tube into two parts, the left part and the right part, the left part and the right part communicate through the pressure valve 5 installed at the bottom of the vertical partition, and the left part communicates with the pressure valve 5 installed at the bottom of the vertical partition. A valve 6 communicates with the water tank 7 of the solar water heater, the right part is connected with the heater 9 connected to the lower end of the solar water heater through the second valve 8, the upper end of the heater is provided with a third valve, and the outer surface of the inner glass tube is coated with Solar selective absorbing coatings;

Rotary motor 3, which is arranged on the bottom of the cover glass tube, drives the rotation of the cover glass tube;

Vibration cleaning device, which includes gel ball 10, high-pressure water pump 11 and discharge pipe 12, the gel ball is placed at the water outlet of the high-pressure water pump, and the water outlet of the high-pressure water pump is connected to the inner glass The upper end of the tube, the gel pellet enters the left or right part of the inner glass tube driven by the water pressure of the high-pressure water pump, and constantly hits the inner wall of the inner glass tube, and the discharge tube is connected to the lower end of the inner glass tube;

Wherein, either part of the left or right part of the inner glass tube stores water, and the other part is a channel for hot steam. When the part of the inner glass tube storing water is heated to a predetermined temperature, the The hot steam opens the pressure valve at the bottom of the vertical partition in the inner glass tube, and the hot steam enters the channel of the hot steam through the gas-liquid separator connected with the pressure valve, and heats the water in the water tank, while the inner glass tube Both the first valve and the third valve on the upper end of the heater are closed, and the second valve is opened, so that cold water will not enter the left and right parts of the inner glass tube, which can avoid the mixing of cold water and hot water, causing part of the water to be reheated , and can prevent cold water from entering the hot steam channel directly, effectively avoiding the phenomenon of tube explosion. When the hot steam in the channel is heated to a predetermined time, the rotating motor rotates to drive the left and right parts of the inner glass tube to exchange positions, and the water outlet of the high-pressure water pump communicates with a part of the inner glass tube that stores water, and the gel is small The ball enters the inner glass tube under the drive of water pressure, and continuously hits the inner wall of the inner glass tube. It is discharged from the discharge pipe at the lower end of the inner glass tube, and at this time the valve on the upper part of the original hot steam channel is opened, and the water in the water tank flows into the original hot steam channel under the action of gravitational potential energy and is heated. This cycle realizes the vacuum tube It can not only absorb solar energy to heat the water in the water tank, but also remove the scale in the vacuum tube in time, which improves the heating effect of the vacuum tube.

In the vacuum tube of the solar water heater, the gel beads are polyacrylamide gel beads or sodium alginate gel beads.

In the vacuum tube of the solar water heater, the diameter of the gel ball is 3/8 to 2/5 of the diameter of the inner glass tube, and the gel ball can move freely in the inner glass tube and fully hit the pipe wall.

In the vacuum tube of the solar water heater, the part of the inner glass tube that stores water is always facing the sun to fully absorb solar energy, while the channel of the hot steam is always on the side facing away from the sun, so it will not be heated and will not When there is no water in the vacuum tube, once the cold water enters, the tube will explode.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (4)

1. A vacuum tube for a solar water heater, comprising: A cover glass tube and an inner glass tube, the cover glass tube and the inner glass tube are two concentric glass tubes, the space between the cover glass tube and the inner glass tube is a vacuum, and a vertical partition is arranged inside the inner glass tube The vertical partition divides the inner glass tube into two parts, the left part and the right part. The left part and the right part communicate through the pressure valve installed at the bottom of the vertical partition, and the left part communicates with the solar energy through the first valve. The water tank of the water heater is communicated, the right part is connected with the heater connected to the lower end of the solar water heater through the second valve, the upper end of the heater is provided with a third valve, and the outer surface of the inner glass tube is coated with a solar selective absorbing coating; A rotating motor, which is arranged at the bottom of the cover glass tube, drives the rotation of the cover glass tube; Vibration cleaning device, which includes gel beads, a high-pressure water pump and a discharge pipe, the gel beads are placed at the water outlet of the high-pressure water pump, and the water outlet of the high-pressure water pump is connected to the upper end of the inner glass tube , the gel ball enters the left or right part of the inner glass tube driven by the water pressure of the high-pressure water pump, and constantly hits the inner wall of the inner glass tube, and the discharge pipe is connected to the inner glass tube the lower end of the glass tube; Wherein, any part of the left or right part of the inner glass tube stores water, and the other part is a channel for hot steam. The pressure valve opens when the pressure of the hot steam reaches a predetermined value, and the hot steam passes through the The gas-liquid separator enters the channel of hot steam and heats the water in the water tank. At this time, the first valve of the inner glass tube and the third valve on the upper end of the heater are both closed, and the second valve is opened; When the hot steam is heated to a predetermined time, the rotating motor rotates to drive the left and right parts of the inner glass tube to exchange positions, and the water outlet of the high-pressure water pump communicates with a part of the inner glass tube that stores water. Driven by the driving force, it constantly hits the inner wall of the inner glass tube, and the impurities in the knocked water adhere to the surface, and the gel balls are discharged from the discharge pipe at the lower end of the inner glass tube. 2. The vacuum tube of solar water heater according to claim 1, characterized in that, the gel beads are polyacrylamide gel beads or sodium alginate gel beads. 3 . The vacuum tube of solar water heater according to claim 2 , wherein the diameter of the gel ball is 3/8-2/5 of the diameter of the inner glass tube. 4 . 4. The vacuum tube of solar water heater according to claim 1, characterized in that, the part of the inner glass tube which stores water is always set towards the sun, while the passage of hot steam is always on the side facing away from the sun.