Round header shell-and-tube water storage heating multi-tube heat conduction heat exchanger and its manufacturing process

Abstract

The invention discloses a round header shell and tube water storage heater multi-tube heat conducting heat exchanger and a manufacturing process thereof. Two ends of a cold water round tube are communicated with a header body, the header body comprises a header inside semicircular orifice plate, a header outside semicircular plate and a header end cover plate, heater round tubes or combined heater round tubes are arranged in a cold water round tube cavity, the combined heater round tubes and / or the heater round tubes are communicated, a heater inlet joint and a heater outlet joint are communicated with inlet ends and outlet ends of the combined heater round tubes and / or the heater round tubes in a welded manner and then fixedly connected with the header outside semicircular plate, and a cold water inlet joint and a cold water outlet joint are welded on the header outside semicircular plate and communicated with an inner cavity of a header to realize circulation. The thin combined heater round tubes with manifolds for conducting heat, branching flow and converging ends are arranged in the cut-off middle of a heater tube, heat of a hot fluid center of the heater tube is promoted to be rapidly released from multi-tube dividing walls, and heat transfer area in the cold water tube cavity is increased by 45%-100%. By the aid of the reducing round tubes in communication, pressure resistance is high, and water does not easily leak.

Description

technical field [0001] The invention relates to a heating heat exchanger which can be installed and used on a household heating pipe network for heating and exchanging hot water for bathing, in particular to a stainless steel round header shell tube water storage heating multi-tube heat conduction heat exchanger and its manufacture craft. Background technique [0002] 1. The patent number applied on June 10, 2008: 200820024167.1, the authorization announcement on June 3, 2009, the announcement number CN201251383Y, the name of the invention: header split heat storage counterflow heat exchanger. [0003] 2. On July 10, 2011, reapplied patent number: 201120255532.1, announcement number CN202177324U, invention name: header pressure heat exchanger. [0004] 3. The patent number applied on December 5, 2011: 201120499782.X, the authorized announcement number CN202328514U, the name of the invention: a pressure-bearing heat exchanger connected by round tubes connected with pinched e...

AI Technical Summary

Problems solved by technology

[0006] In the existing technical solution of the water storage heat exchanger, the layout of the single heating pipe in the cold water cavity is not reasonable; there is also the fact that the hot fluid center of the single heating pipe is not in contact with the cold fluid, so the heat cannot be effectively used; The heat transfer area of ​​the single heating pipe coiled in the cold water pipe cavity is small, and the output of hot water is interrupted when it is used in exchange.

At the beginning of use, there is heat-conducted water in the heat exchanger (before it was cold water). At this time, you need to use some cold water when taking a bath. Due to the limited amount of water in the heat exchanger, it will become cold during the bath, which is not enough to complete the entire normal operation. Therefore, it is necessary to wait for the newly entered cold water in the heat exchanger to be heat-conducted before using it. Sometimes there will be a cycle of waiting for heating for many times, so that the hot water for bathing cannot be continuously output, which affects bathing

[0007] In order to have a sufficient amount of hot water for continuous output when taking a bath, the current heat exchanger manufacturers generally increase the number of cold water pipes to increase the water storage capacity, which not only increases the manufacturing cost, wastes raw materials, but also increases the volume of the product and increases Transportation costs, installation takes up a lot of space, and more importantly, the heat of the fluid in the center of the heating tube is not easy to be contacted and absorbed by the cold fluid. The effective utilization rate is too low, and most of the heat of the hot fluid is lost, so the heat transfer effect is poor.

The existing technical scheme has the technical defects of small heat transfer area, insufficient utilization of heat energy and poor heat transfer effect

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