Fin-and-tube main heat exchanger for gas heating water heater and manufacturing method thereof

Abstract

The present invention proposes a finned tube main heat exchanger for a gas heating water heater, which includes a collector, a heat exchange flat tube and fins, and the collector includes two water boxes separated by a heat exchange body section The two ends of several heat exchange flat tubes are respectively inserted into the heat exchange flat tube sockets of two water boxes to connect with the current collector. There is a partition plate in the water box, and the heat exchange flat tubes pass through the fin perforations and connect with several The fins are connected, the heat exchange body area is covered with fins, the collector has a water inlet and a water outlet, and is respectively connected to the water inlet joint and the water outlet joint; the heat exchange flat tube is a single-channel straight tube, and its cross-sectional size is 2 to 6 ×10~30mm, at least 10 heat exchange flat tubes are arranged in parallel. 1) The heat exchange tube per unit mass of the present invention has a large heat exchange area, and the heat exchange efficiency of the main heat exchanger is high. 2) The main heat exchanger has a highly compact structure and light overall weight, which can save a lot of material costs. 3) The water resistance and pressure loss of the main heat exchanger are small. 4) The main heat exchanger has the characteristics of simple manufacturing process, easy manufacturing, and low manufacturing cost.

Description

technical field [0001] The invention relates to a main heat exchanger (hereinafter referred to as the main heat exchanger) used for heat exchange between high-temperature flue gas and water flow in a gas heating water heater or water heater. Background technique [0002] The traditional main heat exchanger, such as the Chinese patent "Main Heat Exchanger for Gas Heating Water Heater" (patent application number 200920053400.3) applied by the applicant earlier, adopts the scheme of adding fins to the heat exchange tube, and the heat exchange tube It is formed by connecting straight tubes in series with elbows, and joints are connected at both ends of the heat exchange tubes. Several fins are evenly arranged on the straight tubes at a certain distance to form a fin group. The cross section is circular or elliptical; the fins are welded on the heat exchange tube to expand the heat conduction area, and transfer the heat of the high-temperature flue gas generated by gas combustion...

AI Technical Summary

Problems solved by technology

[0004] This kind of main heat exchanger changes the structure of the traditional main heat exchanger, and uses two metal partitions 10 and seals 12 to make the sanitary water channel (we call it the heat exchange tube) a flat tube with built-in water side fins 13 Shaped structure greatly i

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