Water-cooled heat exchanger and its manufacturing method

Abstract

The invention relates to a water-cooled heat exchanger which comprises a main body, a front end cover and a back end cover, wherein, a plurality of water channels and refrigerant pipelines are respectively arranged in the main body and arranged side by side after penetrating the main body, each refrigerant pipeline is arranged in each water channel, the water channels are communicated at the front and the back end covers, each refrigerant pipeline is respectively communicated with at least one another refrigerant pipeline at the front and the back ends of the main body by connectors, each water channel is respectively communicated with at least one another water channel through water cavities which are arranged at the front and the back end covers and in the end covers, the main body is connected with the front and the back end covers in a sealing manner, when in work, the heat exchange is carried out by utilizing the reverse flow of fluid of the inner and the outer layers of the refrigerant pipelines; the designed heat exchanger has simple structure, low manufacturing cost and good heat exchange effect; and the invention further discloses a method for manufacturing the water-cooled heat exchanger.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a water-cooled heat exchanger and a manufacturing method thereof. Background technique [0002] At present, many heat pump air-conditioning water heaters use water-cooled heat exchangers to prepare hot water, and at the same time replace the function of the condenser to improve work efficiency. The existing water-cooled heat exchangers mainly have two structures: shell-and-tube and plate. . The shell-and-tube heat exchanger is composed of a tube bundle and a shell. Water flows in the shell, refrigerant flows in the tubes, and heat exchange is performed in a reverse convection manner. The disadvantage is that the fluid in the shell has a short stroke and the heat exchange efficiency is not high. The outlet water temperature is low, which cannot meet the demand, and the heat exchanger is bulky and expensive. The plate heat exchanger is assembled by pressing corrugated plates with special...

AI Technical Summary

Problems solved by technology

The shell-and-tube heat exchanger is composed of a tube bundle and a shell. Water flows in the shell, refrigerant flows in the tubes, and heat exchange is performed in a reverse convection manner. The disadvantage is that the fluid in the shell has a short stroke and the heat exchange efficiency is not high. The outlet water temperature is low, which cannot meet the demand, and the heat exchanger is bulky and expensive

The plate heat exchanger is assembled by pressing corrugated plates with special shapes. Non-metallic gaskets are embedded between the plates. A large number of plates and sealed thermal laminations form many channels between the corrugated plates. Two kinds of media with different temperatures Heat exchange is carried out by flowing in spaced channels. Its disadvantage is that the flow resistance of the fluid is relatively large, and a high-power delivery pump is required to allow the fluid to pass through the heat exchanger, and the cost of use is relatively high. In addition, the manufacture of this heat exchanger The process is complicated and the assembly requirements are high, which leads to the extremely expensive price of the product

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