CN203068819U - Wall-mounted corrugated coil pipe solar water heating device - Google Patents

Abstract

The utility model discloses a wall-mounted corrugated coil solar water heater, which provides a method for installing a solar water heater in a relatively small space, for example, it can be installed on a balcony, or it can be installed on an outer wall of a building. . Moreover, there is no water in the vacuum tube to directly contact the glass tube wall, so that no water will flow out after the vacuum tube made of glass is broken. At the same time, the heat storage medium stored in the water tank is not used directly, but a coil heat exchanger made of metal bellows is used for heat exchange, and the heat is used immediately when using water to realize heat utilization.

Description

A wall-mounted corrugated coil solar water heating device

technical field

The utility model relates to a solar water heating device, in particular to a solar heat collection, heat storage, heat conduction and heat utilization device in which vacuum tubes are placed horizontally.

Background technique

Ordinary solar water heaters are placed on top of the thermal insulation water tank, and the solar vacuum heat collector tube (hereinafter referred to as the vacuum tube) is inserted into the thermal insulation water tank from the lower part of the water tank. At this time, the water in the vacuum tube and the water in the water tank are connected, and the vacuum tube absorbs and converts the energy of the sun. , heating the water in the vacuum tube and the heat preservation water tank to heat up the water.

The installation of this solar water heater is limited by the site and can only be installed on flat ground, because the vacuum tube must be inserted vertically, which requires a relatively large site and space to install. Moreover, there is water in the vacuum tube, and the vacuum tube is made of glass. Once broken, the water will flow out, causing a safety hazard.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems, and to provide a method of solar water heater that can be installed in a relatively small space, for example, it can be installed on a balcony, or it can be installed on the outer wall of a building. Moreover, there is no water in the vacuum tube to directly contact the glass tube wall, so that no water will flow out after the vacuum tube made of glass is broken. At the same time, the water (heat storage medium) stored in the water tank is not used directly, but the coil heat exchanger made of corrugated pipes is used for heat exchange, and the heat utilization is realized by using the instant heat when using water.

In order to achieve the above object, the utility model takes the following methods:

As shown in Figure 1, the thermal insulation water tank is made into a cuboid and placed vertically, with the vacuum tubes on one side, inserted horizontally, and arranged to form a plane.

The heat preservation water tank is also the heat storage tank for heat storage. It is made of an inner sleeve 3 and an outer sleeve 2 with upper and lower end covers. Its cross section is rectangular or square, and it is placed vertically. On the plane, open a row of holes, and each hole can be inserted into a heat pipe 5 made of metal. One end of the heat pipe 5 is sealed to prevent water leakage, and the other end is open. It can be directly inserted into the inner sleeve through the connector 6 Inside the cylinder 3. A vacuum tube 1 is set outside the heat conduction tube 5, and the sealed end of the heat conduction tube 5 is inserted into the bottom of the vacuum tube 1, and the vacuum tube 1 covers the metal heat conduction tube, and the end of its open end is inserted into the outer sleeve 2 and the inner sleeve of the thermal insulation water tank. Between the sleeves 3.

In the middle of the two layers of the outer sleeve 2 and the inner sleeve 3, filler 20 is filled, and the filler 20 is a kind of thermal insulation material, and its function is to ensure that the heat stored in the inner sleeve 3 is dissipated outward as little as possible.

In addition, a bellows coil 7 is placed inside the inner sleeve 3 , which acts as a heat exchanger. One end of the bellows coil 7 is a water inlet 81 , and the other end is a water outlet 82 . The water inlet 81 and the water outlet 82 pass through the inner sleeve 3 through the sealing member 7b.

The inner sleeve 3 is filled with a heat storage medium 30 , and likewise, the heat pipe 5 communicating with the inner sleeve 3 is also filled with the same heat storage medium 53 . The heat storage medium 30 and 53 is a liquid that functions to store the heat of sunlight absorbed by the vacuum tube 1 .

In order to adapt to changes in the angle of sunlight throughout the year, the plane formed after the vacuum tubes 1 are arranged forms an angle with the horizontal plane. The heat-absorbing coating of the vacuum tube (that is, the inner wall 11 of the vacuum tube) does not block the heat-absorbing coating of the rear branch pipe.

The utility model vacuum heat collecting tube has the advantages of:

① After the vacuum tube 1 is placed horizontally, the floor space for installing the solar water heater can be greatly saved. In this way, it can be installed on the balcony or on the wall, not just limited to the ground.

②The heat-conducting tube 5 made of metal is designed in the vacuum tube, so that there is no water (or other heat-conducting, heat-storing medium) directly in contact with the glass tube inner wall 11 of the vacuum tube 1 made of glass, and the heat-storing medium 30, 53 is in the heat preservation water tank and The flow between the metal tubes, even if the vacuum tube breaks, it will not flow out, which ensures the safety of the entire system, which is very important for the balcony wall-mounted solar water heater installed at high altitude.

In the utility model, the vacuum heat collection tube 1, the heat conduction tube 5 and the positioning heat resistance plug 4 constitute a heat collection and heat conduction assembly, and the heat collection and heat conduction assembly can be installed and disassembled separately through the connector 6, wherein the vacuum heat collection tube 1 and the heat conduction tube 5 It can also be loaded and unloaded by a single piece, which solves the defect that the solar water heater is paralyzed and cannot work normally after a single vacuum heat collecting tube is damaged in a conventional solar water heater.

③ A bellows coil heat exchanger is designed in the heat preservation water tank, that is: the bellows coil 7, which uses the good heat exchange performance of the bellows to quickly exchange the heat stored in the heat storage medium 30 to the inside of the bellows coil 7, In this way, it can be ensured that the heat stored in the inner sleeve 3 can be utilized immediately and efficiently.

④ Rapid heat conduction: Since the vacuum heat collecting tube 1 can reach a high temperature above 300°C when it is stuffy, a tube with one end closed and a relatively thin inner diameter (the inner diameter of the heat conducting tube 5 is 5 to 30mm) is used to speed up the heat transfer in the heat conducting tube 5. The speed of water 53 convection increases the speed of heat transfer, so that heat can be transferred quickly to achieve heat balance;

⑤ Reducing heat loss: Since the second cavity 52 between the heat conducting tube 5 and the inner wall of the vacuum heat collecting tube 1 is air (without heat conducting medium), the heat leakage caused by insufficient vacuum degree of the vacuum heat collecting tube 1 is greatly reduced;

⑥Increasing the available heat: Although the water in the conventional vacuum heat collecting tube is the first part to be heated, it cannot be used but can only be stored in the vacuum tube, resulting in heat loss. Through the improvement of the heat conduction method, the available heat is greatly increased;

⑦Achieving dense arrangement of vacuum heat collecting tubes: Overcoming the defect of using the outer wall of vacuum heat collecting tubes for positioning, the inner wall of heat collecting tubes is used for positioning, so that the installation distance (tube gap) between two adjacent heat collecting and heat conducting components is shortened to 1-10mm . This is because the cross-sectional diameter and area of the heat conduction channel are greatly reduced, so that the vacuum heat collecting tubes are closely packed and the light-to-heat conversion rate per unit area is improved;

Description of drawings

Fig. 1 is the external structure drawing of the present utility model.

Fig. 1A is an external structure diagram of another perspective of the utility model.

FIG. 1B is a partial view of A-A of FIG. 1 .

Fig. 2 is an external structure diagram of the heat collecting and conducting assembly of the present invention.

FIG. 2A is an isometric cross-sectional view of FIG. 2 .

1. Vacuum collector tube 11. Inner wall of vacuum tube

2. Outer sleeve 2a. A through hole 2b. Vent hole 2c. Installation hanging hole

20. Filling

21. Upper cover 22. Lower cover

3. Inner sleeve 30. Heat storage medium

4. Locate the heat resistance plug

5. Heat pipe 51. First chamber 52. Second chamber 53. Heat storage medium

6. Connectors

7. Corrugated coil 7a. Connecting pipe 7b. Seal

81. Water inlet 82. Water outlet

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings.

Referring to Fig. 1 and Fig. 1A, the utility model is suitable for installation in a small place, the vacuum tube is placed horizontally, and there is no water (or other liquid) in the vacuum tube in direct contact with the tube wall, and the corrugated coil tube is used to instantly Heat exchange solar water heater. It includes a heat storage tank composed of an outer sleeve 2 and an inner sleeve 3 . Both the inner sleeve 3 and the outer sleeve 2 have upper and lower end caps, as shown in FIG. 1 , the upper end cap 21 and the lower end cap 22 of the outer sleeve 2 . On the side of the outer sleeve 2, several groups of heat collecting and conducting components composed of vacuum heat collecting tubes 1, heat conducting tubes 5 and positioning heat resistance plugs 4 are neatly arranged and installed, and these heat collecting and conducting components are connected to the inner sleeve through connecting pieces 6 The cylinder 3 is filled with a heat storage medium 30 inside the inner sleeve 3 and the heat pipe 5 . The space between the outer sleeve 2 and the inner sleeve 3 is filled with fillers 20 for heat preservation to realize heat preservation. On the outer sleeve 2, there is an installation hanging hole 2c, which is convenient for installation. On the inner sleeve 3 and the outer sleeve 2, vent holes 2b are opened, and when the heat storage medium 30 in the inner sleeve 3 is heated and expanded, it can be exhausted outward.

Referring to Fig. 2A, there is a second cavity 52 between the outer wall of the heat pipe 5 and the inner wall 11 of the vacuum heat collecting tube 1, and the second cavity 52 is air, and the heat is transferred to the heat pipe 5 by convection of the air, so that the heat conduction The heat storage medium 53 in the first cavity 51 at the center of the tube 5 is heated, and the convection of the heat storage medium 53 brings heat into the inner sleeve 3 to realize the heating of the heat storage medium 30 in the inner sleeve 3 . The heating method of this kind of heat storage medium (including water) is different from the heat transfer method of the traditional vacuum tube in-line solar water heater, which effectively improves the heat transfer speed, reduces the heat loss, and can increase the available heat by 15-35. %.

In the present utility model, a filler 20 is filled between the outer sleeve 2 and the inner sleeve 3, and the filler 20 can be foamed polyurethane insulation material, expanded polystyrene foam insulation, glass fiber surface, rock wool and other materials, Its function is to ensure that the heat stored in the inner sleeve 3 is dissipated outward as little as possible. In the present utility model, materials such as rubber, silica gel or cork are used for the positioning heat resistance plug 4 .

Referring to Fig. 2, in the utility model, the vacuum heat collecting tube 1, the heat conducting tube 5 and the positioning heat resistance plug 4 constitute a heat collecting and conducting assembly, and the heat collecting and conducting assembly is sealed and connected with the inner sleeve 3 through the connecting piece 6 , can realize the separate installation and disassembly of heat-collecting and heat-conducting components; the vacuum heat-collecting tube 1 and heat-conducting tube 5 can also be installed and disassembled individually, which solves the defect that solar energy cannot work normally caused by the damage of a single heat-collecting tube in conventional solar water heaters. At the same time, the installation and disassembly operations are simple and convenient. In order to solve the defect of low light-to-heat conversion rate per unit area caused by the arrangement of gaps in the vacuum tubes, multiple heat-collecting and heat-conducting components can be densely arranged on the inner sleeve 3 . The installation gap between each heat-collecting and heat-conducting component is only 1-15 mm, and the heat-collecting and heat-conducting components installed in close arrangement of the utility model can increase the light-to-heat area conversion rate by 10-35%. Conventional practice, for example, a water heater assembled with a vacuum tube with a diameter of 58mm, a length of 1800mm, a distance between the centers of the tubes of 80mm, and a gap between the two tubes of 22mm, is the same as the improved one with a diameter of 58mm and a length of 1800mm, but the distance between the centers of the tubes is 60mm, and the gap between the two tubes (installation gap) is 2mm. Compared with water heaters, the light-to-heat area conversion rate can be increased by 33% by adopting the close-packed method.

In the utility model, the vacuum heat collecting tube 1 is made of double-layer all-glass vacuum solar heat collecting tube material that is common on the market. The inner diameter of the vacuum heat collecting tube 1 is 30-70mm.

In the utility model, the heat storage medium 30 in the heat conducting tube 5 is greatly reduced compared with the water in the original vacuum heat collecting tube. Taking the vacuum heat collecting tube with a diameter of 58 mm and a length of 1800 mm as an example, the original single vacuum heat collecting tube has a water capacity of 3 L, while If a pipe with an inner diameter of 15mm and a length of 1900mm is used as the heat pipe, its water capacity is only 0.33L, which is only 11% of the original structure. Although the water in the conventional vacuum heat collecting tube is the first part to be heated, it cannot be used and can only be kept in the vacuum tube, causing heat loss. Using air as the heat conduction medium, the heat conduction pipe 5 will be heated quickly, thereby realizing rapid convection between the water in the heat conduction pipe and the water in the water tank, realizing heat exchange, achieving heat balance, and greatly reducing heat loss. This improvement to the heating method greatly increases the available heat.

The second cavity 52 formed by the heat conducting tube 5 and the vacuum heat collecting tube 1 of the utility model is filled with air, and no liquid heat conducting medium is added. The single independent installation and disassembly of the heat collecting and conducting components improves the service life of the solar hot water tank.

In order to adapt to changes in the angle of sunlight throughout the year, the plane formed after the vacuum tubes 1 are arranged forms an angle with the horizontal plane. The heat-absorbing coating of the vacuum tube (that is, the inner wall 11 of the vacuum tube) does not block the heat-absorbing coating of the rear branch pipe. In the utility model, this angle is set to 30°-80°, and this angle is applicable to most regions of the world.

Inside the inner sleeve 3, a bellows coil 7 is arranged, which functions as a heat exchanger. One end of the bellows coil 7 is a water inlet 81, and the other end is a water outlet 82. The water inlet 81 and the water outlet 82 pass through the inner sleeve 3 through the sealing member 7b. In terms of heat conduction efficiency in practical applications, the bellows heat exchanger has a great advantage over the straight tube heat exchanger, because the surface area of the bellows is 3-4 times or even more than that of the straight tube, that is to say: use For coil heat exchangers made of corrugated tubes and straight tubes, under the same inner diameter, outer diameter, and number of coils, the heat exchange area of the bellows is 3-4 times that of the straight tube.

After using the corrugated coil heat exchanger, another obvious advantage of the technical solution of the utility model is: heat storage and heat use are separated. The heat storage medium 30, 53 is liquid used repeatedly, its main function is to store the heat of solar energy, and also has the function of heat conduction, that is: the heat of sunlight converted by the vacuum tube 1 passes through the heat conduction tube 5 and the heat storage in the heat conduction tube 5 The heat medium 53 is conducted to the heat storage medium 30 in the inner sleeve 3 and stored. The heat storage medium 30 does not directly participate in the use of heat. When the user needs to use heat, that is, when hot water is needed, cold water flows in through the water inlet 81, passes through the corrugated coil 7, exchanges heat with the heat storage medium 30, and then flows out through the water outlet 82, which is hot water up. In this way, the purpose of heat storage and heat separation, instant heat and high-efficiency heat utilization is realized.

Claims (6)

1. A solar water heating device for wall-mounted corrugated coil heat exchange, characterized in that: a heat storage tank is made of an inner sleeve (3), a filler (20) and an outer sleeve (2), and one There are several heat-collecting and heat-conducting assemblies composed of vacuum heat collecting tubes (1), heat conducting tubes (5) and positioning heat resistance plugs (4) installed on the side, connected to the inner sleeve (3) through the connecting piece (6), the first The heat storage medium (30) and the second heat storage medium (53) are filled with the inner cavity formed by the inner sleeve (3) and the heat pipe (5), and inside the inner sleeve (3), there is a water inlet (81) and the bellows coil (7) of the water outlet (82). the 2. A wall-mounted corrugated coil heat exchange solar water heating device according to claim 1, characterized in that: the corrugated coil (7) is made of metal materials, and these metal materials are copper, stainless steel, Aluminum, Nickel. the 3. A wall-mounted corrugated coil heat exchange solar water heating device according to claim 1, characterized in that: several vacuum heat collecting tubes installed on the outer sleeve (2) and the inner sleeve (3) (1), the heat-collecting and heat-conducting assembly composed of the heat pipe (5) and the positioning heat-resistance plug (4) forms a plane, and this plane forms an angle with the horizontal plane, and the angle is between 30°-80°. the 4. A wall-mounted corrugated coil heat exchange solar water heating device according to claim 1, characterized in that: the first heat storage medium (30) and the second heat storage medium (53) are the same liquid material . the 5. A wall-mounted corrugated coil heat exchange solar water heating device according to claim 4, the first heat storage medium (30) and the second heat storage medium (53) are the same liquid material, characterized in that : This material is water, ethylene glycol, antifreeze, heat transfer oil. the 6. A wall-mounted corrugated coil heat exchange solar water heating device according to claim 1, characterized in that the filler (20) is a thermal insulation material. the

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