Three-section type in-line sleeve double-path rotary heat exchanger

Abstract

The invention discloses a three-section type in-line sleeve double-path rotary heat exchanger. The heat exchanger comprises an upper cover, a base and a middle section, the middle section comprises an inner pipe and an outer sleeve, the base is provided with an elbow with an opening formed in an upper plate of the base, an inlet pipe and an outlet pipe, the upper plate of the base is provided with a first positioning step and a second positioning step at opening edges of the elbow, the inlet pipe and the outlet pipe, the inner pipe and the outer sleeve are welded to the first positioning step and the second positioning step respectively, the upper cover comprises a cover plate and a top bend, the cover plate is provided with a plurality of sets of pipe holes, an edge of each pipe hole is provided with a third positioning step, a fourth positioning step and a fifth positioning step, the fifth positioning step is opposite to the third positioning step and the fourth positioning step in direction, the other end of the inner pipe and the other end of the outer sleeve are welded to the third positioning step and the fourth positioning step respectively, the top bend is welded to the fifth positioning step, interlayers are formed between the inner pipe and the outer sleeve, a communicating cavity is formed in the upper plate of the base and the cover plate so that the two adjacent interlayers close to the elbow or the top bend can communicate, and the base and the upper cover are formed through metal injection molding. The heat exchanger is excellent in heat exchange effect.

Description

Technical field [0001] The present invention relates to the technical field of heat exchange equipment, and more particularly to a three-stage direct row sleeve dual rotary heat exchanger. Background technique [0002] The thermal hand of the existing heat pump water heater mainly includes a housing, inner cylinder, and coil, the coil in the annular cylindrical spiral spiral discharge between the housing and the inner cylinder, and the refrigerant is inlet, and the refrigerant is inwardly in the side wall of the housing. After the gas phase refrigerant enters the ring barrel space between the housing and the inner cylinder, the gas phase is downward, and the outer surface of the coil is in contact with the outer surface of the coil, which is heat exchange with water in the coil. The refrigerant is submerged in the annular cylinder space, and after reaching the bottom end, the inner cylinder is entered by the four holes at the bottom end, and the inner tube is rising, and the outl...

AI Technical Summary

Problems solved by technology

Obviously, this kind of heat exchanger in the form of a coil has a low flow rate of refrigerant on the effective heat exchange interface, so the flow of the refrigerant is laminar, and its heat exchange efficiency mechanism is higher than that of a heat exchanger in the form of a sleeve. Poor; the other side casing heat exchanger usually collects the refrigerant and the brine at both ends of the double-layer casing, but due to the limitation of the existing manufacturing technology, when the total length of the casing is long, It is difficult for the inner and outer sleeves to ensure the distance between the outer wall of the inner tube and the inner wall of the outer tube, especially during the coiling process. Therefore, it is difficult to make the existing double-layer sleeves longer and of any length. The common The casing spiral can only be coiled once or twice, because the length of the casing is limited, although the refrigerant flow rate in the interlayer between the outer wall of the inner tube and the inner wall of the outer tube can be fast and easily form turbulent flow, but the heat exchange flow distance Short, short heat exchange time leads to insufficient heat exchange, which makes the shortcomings of the heat exchanger in the form of casing more obvious

Images