Heat exchanger and gas water heater using heat exchanger

Abstract

The invention relates to a heat exchanger and a gas water heater using the heat exchanger. The heat exchanger comprises a housing (1) and heat exchanging pipes (2) arranged in the housing (1) in a penetrating manner, wherein a housing inlet (11) and a housing outlet (12) are formed in the housing (1). The heat exchanger is characterized in that a plurality of casing pipes(3) which are arranged inparallel are also arranged in the housing (1); each casing pipe (3) is divided into at least two layers; each layer comprises one or more casing pipes(3); each casing pipe communicates with the corresponding casing pipe in the corresponding adjacent layer; the heat exchanging pipes (2) are sequentially arranged in the casing pipes (3) in the penetrating manner; a second heat exchanging medium enters the corresponding casing pipes in the adjacent layers after being discharged from the casing pipes; and the casing pipe inlet located at the bottommost layer communicates with the housing inlet (11), and the casing pipe outlet located at the topmost layer communicates with the housing outlet (12). Through the adoption of the heat exchanger disclosed by the invention, the stroke and remaining time of the second heat exchanging medium can be sufficiently enlarged and prolonged, so that the heat exchanging effect and heat exchanging efficiency are further enhanced; and the heat exchanger is compact in structure and convenient to process.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a heat exchanger and a gas water heater using the heat exchanger. Background technique [0002] CN201820109002.8 discloses "A Flue Gas Waste Heat Recovery Tubular Heat Exchanger", which includes a shell, a flue gas circulation pipe, a filter device, a hot water chamber, a cold water chamber and a water pipe. The upper inner chamber of the shell is separated by a partition A hot water chamber is formed, and the lower inner cavity of the shell is separated by another partition to form a cold water chamber. The middle inner cavity of the shell is fixed with a flue gas circulation pipe, and the flue gas circulation pipe is in a spiral structure. A number of through holes are opened, and the hot water chamber and the hot water discharge pipe are connected through a plurality of water pipes, in which the two ends of the water pipes are respectively connected to the through holes of the t...

AI Technical Summary

Problems solved by technology

However, in this patent, there are multiple water pipes that exchange heat with the flue gas. These water pipes are arranged in parallel, which increases the complexity of the structure, the difficulty of processing and the difficulty of assembly; and its heat exchange efficiency can be further improved.

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