Elliptical continuous twisted tube coaxial heat exchanger

Abstract

The invention discloses an elliptical continuous twisted tube coaxial heat exchanger, which is composed of an outer tube and an inner tube arranged in an inlaid manner, wherein the outer tube is a round tube; the inner tube is configured as a single elliptical continuous twisted tube or an approximately elliptical continuous twisted tube, and an outer long shaft of the inner tube is equal to the inner diameter of the outer tube; the ratio of long diameter to short diameter of the inner tube is 1:0.2 to 0.6; the twisting inclination of the inner tube is set as 10 to 60 degrees; the direction of the long short shaft of the inner tube and an included angle of the axis of the inner tube are changed alternatively; an inner tube joint portion and an outer tube joint portion at two ends of the heat exchanger are welded and closed; outer tube walls of the inner tube joint portion and the outer tube joint portion at two ends of the heat exchanger are respectively provided with an inlet and an outlet made of working substance; the inner tube arranged in an inlaid manner and the outer tube are integrally spirally bent in a superposed circular disk shape in order to form the elliptical continuous twisted tube coaxial heat exchanger with the integral shape of spiral runway, spiral mosquito repellent or spring. The elliptical continuous twisted tube coaxial heat exchanger has the advantages of higher heat transfer coefficient, improved compactness, good pressure and vibration resistance as well as dirt resistance, little possibility of deformation and plugging, flexible structure, convenient arrangement, low price and saving expenditure.

Description

Technical field: [0001] The invention belongs to the category of heat exchange devices, in particular to an elliptical continuous twisted tube coaxial heat exchanger. Background technique: [0002] Heat exchangers are widely used in various industrial fields and are important equipment to achieve heat transfer process requirements. Tube and tube heat exchangers are often used in heat pumps, air conditioners, HVAC and other fields. In the prior art, the sleeve-and-tube heat exchanger is generally used, which is one or several light pipes inside an outer tube, but the heat transfer efficiency of this kind of heat exchanger is generally low; in addition, this type of heat exchanger is used in When it is made into a coaxial spiral sleeve type, there must be a support in the outer tube to ensure coaxiality and no damage. [0003] Another is that the inner tube adopts a multi-head spiral tube. The unique multi-head spiral design of the inner tube makes the fluid form a swirling ...

AI Technical Summary

Problems solved by technology

However, due to the production process, there are few domestic manufacturers of elliptical twisted tubes, and there are no products for coaxial heat exchangers using elliptical twisted tubes as the inner tube.

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