CN103062926A - Pressure-bearing solar water heater heat exchange structure and water heater adopting same - Google Patents

Abstract

The invention discloses a pressure-bearing solar water heater heat exchange structure and a water heater adopting the structure. The heat exchange structure includes a glass vacuum tube, a heat exchange dead pipe arranged in a solar inner tank, and one end is arranged in the heat exchange dead pipe , the other end is arranged in the heat pipe in the glass vacuum tube, wherein, the dead heat exchange tube is fixedly connected to the inner tank by welding; the dead heat exchange tube forming the heat exchange structure and the water heater inner tank It is connected by welding, which increases the airtightness between the heat exchange dead leg and the inner tank, and reduces the installation process and manufacturing cost between the heat exchange dead leg and the inner tank. At the same time, the heat exchange dead leg and the inner tank The inner tanks are made of the same metal material and overall enamel, which enhances the corrosion resistance of the heat exchange blind leg and the inner tank, and is not easy to generate scale. Even after the scale is generated, the scale is easy to fall off under the action of water flow .

Description

A pressure-bearing solar water heater heat exchange structure and a water heater adopting the structure

technical field

The invention relates to the technical field of solar water heaters, in particular to a heat exchange structure of a pressurized solar water heater and a water heater adopting the structure.

Background technique

With the progress of society and the improvement of people's awareness of environmental protection, solar water heaters, as a relatively cheap, low-carbon, environmentally friendly, and high-safety household equipment, have long been widely used by people. It uses solar energy to heat water, which is relatively Because electric water heaters and gas water heaters have high safety, at the same time, the cost of using solar water heaters is low. Except for equipment costs, no other investment is required in the water heating process, so solar water heaters are widely used.

The heat exchange methods generally used in the existing solar water heater heat pipe solar water heater system include the following: one is the coil heat exchange method; the other is the interlayer bile heat exchange method; the third is the heat exchange blind pipe method; There is a way that the heat pipe directly heats the water.

The first heat exchange method mentioned above is difficult to process the coil and has high investment cost. Due to the long pipeline and the high resistance of the curved pipe, and the inner surface of the coil is prone to scale; the second heat exchange method is interlayer bile. It is easy to corrode and has a high investment cost. The heat pipe directly heats the water. At high temperature, scale is easily formed on the surface of the heat pipe, which causes the surface of the heat pipe to corrode and affects the life of the heat pipe. At the same time, the first two heat exchange methods need to add heat exchange medium, which virtually increases the cost of the product. The heat exchange method of the third heat exchange blind pipe does not need to be filled with heat exchange medium or water in the glass vacuum tube, and the structure is simple, easy to manufacture and install, and the manufacturing cost is low, so it is widely used, but the existing heat exchange The dead leg is made of copper material, which is easy to form electric corrosion with the carbon steel or stainless steel liner in water, resulting in the scrapping of the copper dead leg, and it is connected with the liner by threads, which is prone to leakage. In addition, the process is complicated. Manufacturing costs are higher.

Contents of the invention

The purpose of the present invention is to propose a pressure-bearing solar water heater heat exchange structure and a water heater adopting the structure, which can enhance the airtightness between the heat exchange structure and the inner tank, and avoid the occurrence of electric corrosion between the heat exchange blind pipe and the inner tank. phenomenon, and reduce the manufacturing cost of solar water heaters.

For reaching this purpose, the present invention adopts following technical scheme:

A pressure-bearing solar water heater heat exchange structure, comprising a glass vacuum tube, a heat exchange dead-leg arranged in a solar inner tank, and a heat pipe with one end arranged in the heat-exchange dead-leg and the other end arranged in the glass vacuum tube, Wherein, the heat exchange dead leg is fixedly connected to the inner tank by welding.

As a preferred solution of the above-mentioned heat exchange structure, the heat exchange blind pipe and the inner tank are integrally enamelled.

As a preferred solution of the above-mentioned heat exchange structure, the heat exchange dead-leg and the inner tank are both made of the same material.

As a preferred solution of the above heat exchange structure, the heat exchange blind pipe is made of carbon steel.

As a preferred solution of the above-mentioned heat exchange structure, the heat exchange blind pipe is an integral structure.

As a preferred solution of the above-mentioned heat exchange structure, a sealing rubber ring for sealing is also provided at the joint between the heat exchange dead leg and the inner tank.

As a preferred solution of the above-mentioned heat exchange structure, a stepped hole is opened on the inner tank, and an annular groove matching the stepped hole is arranged on the dead heat exchange pipe.

As a preferred solution of the above heat exchange structure, the heat pipe includes a condensing end and a heat collecting end, the condensing end extends into the inside of the heat exchange dead-leg, the heat collecting end is located inside the glass vacuum tube, and the heat collecting end Heat transfer fins are arranged on the outside, and the heat transfer fins are in contact with the glass vacuum tubes and transfer heat to the heat pipes.

As a preferred solution of the above heat exchange structure, the contact position between the heat exchange dead leg and the inner tank is also filled with sealant.

A solar water heater adopting the above-mentioned heat exchange structure, which includes a solar support, a water storage tank arranged on the top of the support, and several glass vacuum tubes obliquely arranged on the support. A row of through holes is provided for fixing the heat exchange dead pipe, and the solar water heater also includes a heat pipe; one end of the heat pipe is located inside the heat exchange dead pipe, and a part is located inside the glass vacuum tube, which is used for the glass vacuum tube The heat exchange between the heat exchange dead-leg.

The beneficial effects of the present invention are as follows: the present invention provides a pressure-bearing solar water heater heat exchange structure and a water heater adopting the structure, and the heat exchange blind pipe constituting the heat exchange structure is connected with the inner tank of the water heater by welding. The unique connection method increases the airtightness between the heat exchange dead leg and the inner tank, and reduces the connection process and manufacturing cost between the heat exchange dead leg and the inner tank. At the same time, the heat exchange dead leg and the inner tank are made of the same metal material It is made of integral ceramics, which enhances the corrosion resistance of the heat exchange blind leg and inner tank, and is not easy to generate scale. Even after the scale is generated, the scale is easy to fall off under the washing action of the water flow.

Description of drawings

Fig. 1 is a structural schematic diagram of the cooperation of the blind heat exchange tube provided by the specific embodiment of the present invention and the solar inner tank;

Fig. 2 is a partial cross-sectional view of a dead heat exchange pipe provided by a specific embodiment of the present invention;

Figure 3 is a partial enlarged view at "A" in Figure 1;

Fig. 4 is a schematic diagram of the overall structure of a solar water heater provided in a specific embodiment of the present invention;

Fig. 5 is a partially enlarged view at "B" of Fig. 4 .

in:

1: Glass vacuum tube; 2: Heat exchange blind tube; 3: Heat pipe; 4: Inner tank; 5: Water storage tank; 6: Solar bracket;

31: condensation end; 32: heat collection end; 33: heat transfer fin.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

As shown in Figures 1 to 3, the present invention provides a pressure-bearing solar water heater heat exchange structure, which is suitable for absorbing heat and transferring the absorbed heat to the water to be heated in the solar water tank, including a glass vacuum tube 1, which is arranged on The heat exchange dead pipe 2 in the solar energy liner 4, and one end is arranged in the heat exchange dead pipe 2, and the other end is arranged in the heat pipe 3 of the glass vacuum tube 1, wherein, in order to reduce the connection between the heat exchange dead pipe 2 and the inner tank 4 The airtightness between the two simplifies the installation process and reduces the installation cost. In this application, the dead heat exchange pipe 2 and the inner tank 4 are fixedly connected by welding.

In order to prevent the dead heat exchange leg 2 and the inner tank 4 from being prone to electric corrosion in water due to the use of different metal materials, which may easily cause damage to the heat exchange dead leg 2, in this application, the heat exchange dead leg 2 and the inner tank 4 Made of the same material, such as carbon steel or stainless steel, preferably, the blind heat exchange pipe 2 and liner 4 of this application are made of 20# carbon steel with low steel strength, good toughness, plasticity and weldability.

The heat exchange dead leg 2 has an integrated structure without welds, and the heat exchange dead leg of the integrated structure has better airtightness, which can effectively prevent water leakage; The overall enamel can further improve the corrosion resistance of the heat exchange blind tube 2 and the inner tank 4, and it is not easy to generate scale. Even if some scale will be generated after long-term use, the scale will easily fall off under the action of water flow , avoiding the problem that the heat exchange efficiency decreases due to the scaling on the outer surface of the heat exchange blind pipe 2 .

In order to further enhance the airtightness between the heat exchange dead leg 2 and the inner tank 4, a sealing rubber ring (not shown) for sealing is also provided at the connection between the heat exchange dead leg 2 and the inner tank 4, and at the same time There is a stepped hole on the liner 4, and an annular groove matching the above-mentioned stepped hole is arranged on the heat exchange blind pipe 2. Through the cooperation between the annular groove and the stepped hole, the heat exchange blind pipe 2 is embedded in the solar water heater The liner 4 is filled with a sealant at the position where the dead heat exchange leg 2 contacts the inner liner 4, which can further improve the airtightness between the dead heat exchange leg and the inner liner.

As shown in Figure 5, the heat pipe 3 includes a condensation end 31 and a heat collection end 32, wherein the condensation end 31 extends into the heat exchange blind pipe 2, the heat collection end 32 is located inside the glass vacuum tube 1, and the heat collection end 32 Heat transfer fins 33 are arranged on the outside, and the heat transfer fins 33 are in contact with the glass vacuum tube 1 and transfer the heat absorbed by the glass vacuum tube 1 to the heat pipe 3 .

The working principle of the heat exchange structure of the solar water heater provided by the application is: the glass vacuum tube 1 absorbs solar energy, and the heat is transferred to the heat collecting end 32 of the heat pipe 4 through the heat transfer fin 33 of the heat pipe 3, and the heat collecting end 32 of the heat pipe 3 transfers the heat Transfer to the condensing end 31, extend into the condensing end 31 inside the heat exchange blind pipe 2 to dissipate heat, transfer the heat to the heat exchange dead pipe 2, and connect the heat exchange blind pipe 2 connected with the solar water tank 5 by welding. Heat is transferred to the water stored in the solar water tank 5, thereby heating the water in the water tank.

As shown in Fig. 4 and Fig. 5, the present invention also provides a solar water heater adopting the above-mentioned heat exchange structure, which includes a solar support 6, a water storage tank 5 arranged on the top of the support 6, and an obliquely arranged Several glass vacuum tubes 1 on 6, the number of the glass vacuum tubes 1 is 10 to 20, and a row of through holes is arranged on the inner tank 4 of the water storage tank 5, which is used for fixing the heat exchange blind tube 2; the solar water heater also includes Heat pipe 3, one end of the heat pipe 3 is located inside the heat exchange dead pipe 2, and the other part is located inside the glass vacuum tube 1, for heat exchange between the glass vacuum tube 1 and the heat exchange dead pipe 2.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

Claims (10)

1. pressure-bearing type solar water heater heat exchange structure, comprise glass-vacuum tube, be arranged on the heat exchange blind pipe in the solar energy inner bag, and one end be arranged in the described heat exchange blind pipe, the other end is arranged at the heat pipe in the described glass-vacuum tube, it is characterized in that, the mode by welding between described heat exchange blind pipe and the described inner bag is fixedly connected with.

2. heat exchange structure according to claim 1 is characterized in that, the whole enamel of described heat exchange blind pipe and inner bag.

3. heat exchange structure according to claim 1 is characterized in that, described heat exchange blind pipe and inner bag all adopt same material to make.

4. heat exchange structure according to claim 3 is characterized in that, described heat exchange blind pipe is made by carbon steel.

5. heat exchange structure according to claim 3 is characterized in that, described heat exchange blind pipe is the integral type structure.

6. heat exchange structure according to claim 1 is characterized in that, the junction of described heat exchange blind pipe and inner bag also is provided with the O-ring seal for sealing.

7. heat exchange structure according to claim 1 is characterized in that, offers shoulder hole on the described inner bag, is provided with the annular groove that matches with described shoulder hole on the described heat exchange blind pipe.

8. heat exchange structure according to claim 1, it is characterized in that, described heat pipe comprises condensation end and collecting end of heat, described condensation end extend into the inside of heat exchange blind pipe, described collecting end of heat is positioned at the inside of glass-vacuum tube, the outer setting of described collecting end of heat has thermofin, and described thermofin contacts with described glass-vacuum tube and with the heat transferred heat pipe.

9. the described heat exchange structure of any one is characterized in that according to claim 1 ~ 8, and contacted position also is filled with fluid sealant between described heat exchange blind pipe and the inner bag.

10. solar water heater that adopts heat exchange structure as claimed in claim 9, it is characterized in that, comprise solar bracket, be arranged on the storage tank of a top of the trellis, and be inclined at several glass-vacuum tubes on the described support, be provided with an exhausting hole on the inner bag of described storage tank, be used for the fixing of heat exchange blind pipe, described solar water heater also comprises heat pipe; One end of described heat pipe is positioned at the inside of heat exchange blind pipe, and a part is positioned at the inside of glass-vacuum tube, and it is used for the exchange heat between described glass-vacuum tube and the heat exchange blind pipe.

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