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A double-opening vacuum heat collecting tube

A technology of vacuum heat collecting tubes and double openings, applied in the field of heat collecting tubes, can solve the problems of easy accumulation of scale, difficult to clean, and easy bursting of the seal, and achieve the effect of sufficient heat exchange and good pressure bearing characteristics

Active Publication Date: 2017-12-08
朱亚剑
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Problems solved by technology

[0005] Aiming at the technical problems of the above single-opening or double-opening vacuum heat-collecting tubes, the present invention provides a double-opening vacuum heat-collecting tube, which has solved the problems of easy accumulation of scale in the existing vacuum heat-collecting tubes, difficulty in cleaning, no pressure, and easy bursting of the seal

Method used

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  • A double-opening vacuum heat collecting tube
  • A double-opening vacuum heat collecting tube
  • A double-opening vacuum heat collecting tube

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Embodiment Construction

[0021] Below in conjunction with example the present invention is described in further detail, but not limitation of the present invention.

[0022] The invention discloses a double-opening vacuum heat collecting tube, such as image 3 As shown, there are two tubes inside and outside, the outer tube is a glass tube 6, and the inner tube is a metal tube 5, wherein the sealed space formed by the metal inner tube and the glass outer tube is vacuumed to form a vacuum gap interlayer 11. Vacuum gap interlayer vacuum is higher than 10 -2 pa, which can better prevent the solar radiant heat absorbed by the metal inner tube from dissipating into the surrounding environment through the outer tube. The two ends of the metal inner tube and the glass outer tube are sealed with a seal 7. On the seals at both ends, a vacuum interface 9 and an opening 8 are arranged on the seal at one end, and only an opening 8 is set on the seal at the other end, forming a double seal. Open vacuum heat coll...

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Abstract

The invention provides a double-opening vacuum heat collecting tube, which has two inner and outer tubes, the outer tube is a glass tube, and the inner tube is a metal tube. The sealed space formed by the metal inner tube and the glass outer tube is vacuumized to form a vacuum gap interlayer. The sealing member seals both ends of the metal inner tube and the glass outer tube, and the sealing member at both ends is provided with a vacuum interface and an opening on the sealing member at one end, and an opening is provided on the sealing member at the other end. The outer wall of the vacuum heat collecting tube is made of glass material, and the inner wall is made of stainless steel, copper, titanium alloy and other metal or alloy materials. Applied to problems in solar water heating systems that require the system to be pressurized. The special sealing part of the nozzle solves the technical problems of glass tube breakage caused by fusion sealing, expansion, and stress at the joint between the existing glass vacuum heat collecting tube and the metal tube, and makes the heat exchange inside the system more sufficient.

Description

technical field [0001] The invention relates to a heat collecting tube, in particular to a vacuum heat collecting tube with double openings. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection, more and more consumers tend to choose solar water heaters. The heat collecting tube is the core of the solar water heater, and its structure is like an elongated thermos bile, with a vacuum between the inner and outer layers. The outer surface of the inner glass tube is coated with a spectrally selective absorption coating using a special process to absorb solar radiation energy to the maximum. Existing heat collecting tubes all have one end open and one end closed, forming the shape of a U-shaped tube. However, its disadvantage is that when it is used in natural circulation, scale will accumulate on the closed end of the heat collecting tube. If it is not removed for a long time, the scale will block the outlet end of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/46
CPCY02E10/40
Inventor 朱亚剑
Owner 朱亚剑
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