Plate-fin heat exchanger for gas heater

Abstract

The invention discloses a plate-fin heat exchanger for a gas heater, comprising a core body, seal heads, an inlet connection pipe and an outlet connection pipe, wherein the core body comprises a plurality of flue gas channels and sanitary water channels which are divided by partition plates in a rectangular cavity and are alternately connected; in the flue gas channel, flue gas side fins are arranged between two metal partition plates and are longitudinally arrayed, and the left and the right sides of each flue gas side fin are sealed by sealing tapes; in the sanitary water channel, water side fins are arranged between two metal partition plates and are transversely arrayed, the upper and the lower sides of each water side fin are sealed by sealing tapes, the left and the right ends of each water side fin are respectively communicated with the two seal heads, the seal heads at both sides are respectively connected with the inlet connection pipe and the outlet connection pipe of sanitary water, and the flue gas side fins and the water side fins are in continuous groove structures. The gas-water exchanger of the gas heater has high heat exchange efficiency, reduces the consumption of gas and achieves the purposes of saving energy, reducing device size and reducing production cost.

Description

technical field [0001] The patent of the present invention relates to a gas water heater heat exchanger, in particular to a stainless steel plate-fin heat exchanger. technical background [0002] my country's gas water heaters are in the process of product upgrading. At present, gas water heaters are developing in the direction of large capacity and miniaturization, and the gas-water heat exchanger is one of the main components of gas water heaters, accounting for about 1 / 3 of the volume of the entire gas water heater. [0003] In traditional gas water heaters, the heat exchanger generally adopts a finned tube heat exchanger, which is usually composed of a snake-shaped round tube or an oval tube with fins added by extrusion process, and the channel inside the tube is a sanitary water channel. , outside the pipe is the flue gas channel. Since the heat exchange tubes of the tubular heat exchanger are snake-shaped, the manufacturing process requires a bending process, so its ...

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Problems solved by technology

In addition, in order to ensure its heat exchange strength, it is necessary to arrange a large number of fins with a large surface area and dense distribution outside the heat exchange tubes, which not only makes the overall volume of the heat exchanger larger and the manufacturing cost is higher, but also makes the side of the fins The channel resistance is relatively large, which affects the combustion conditions of the water heater combustion chamber, increases the CO content and is not conducive to the enhanced heat transfer process of the heat exchanger

[0004] At present, copper and aluminum prices continue to rise, resulting in higher and higher manufacturing costs of gas water heaters, seriously affecting their competitiveness in the water heater market

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