A compact primary surface heat exchanger for oil and gas heaters

Abstract

In order to solve the problems of low heat exchange efficiency and large volume of a heat exchanger in the prior art, the invention provides a compact primary surface heat exchanger with high heat exchange efficiency. The heat exchanger comprises a heat exchange shell and a heat exchange core, wherein the heat exchange shell comprises an outer shell, a front inner shell, a rear inner shell, a front fixing piece and a rear fixing piece; the upper side of the front part of the outer shell is provided with a liquid outlet; the lower side of the rear part of the outer shell is provided with a liquid inlet; the heat exchange core comprises a frame and a plurality of heat exchange units which are fixed on the frame and arranged along the horizontal direction; a plurality of liquid flow channelswhich are through along the vertical direction are formed in each heat exchange unit; and a gas flow channel which is through along the longitudinal direction is formed between adjacent heat exchangeunits. The heat exchange surface of the heat exchanger is a primary surface, so heat transfer heat resistance is reduced compared with that of a secondary surface fin heat exchange mode, the heat exchange efficiency and volume density are improved, the problem of overlong preheated start time of a vehicle engine in a low-temperature environment is solved, the environmental adaptability of a vehicle is improved, and the vehicle can be quickly and reliably started in the low-temperature environment.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency original surface heat exchange for fuel oil and gas heaters, and particularly relates to a compact original surface heat exchanger for fuel oil and gas heaters. Background technique [0002] Engine low temperature auxiliary starting equipment (hereinafter referred to as heater) is an important auxiliary device for rapid engine cold start, vehicle interior heating, windshield defrosting and battery insulation under low temperature conditions, and has good application prospects at home and abroad. The heater is mainly composed of a heat exchanger, a burner and a controller. The performance of the heat exchanger determines the adaptability and reliability of the low temperature start of the engine. The heat exchanger with good heat exchange effect can greatly shorten the low temperature start time. . In the prior art, for example, the Chinese patent application with the publication number CN...

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Problems solved by technology

[0003] Aiming at the problem of low heat exchange efficiency of heat exchangers in the prior art, the present invention provides a compact primary surface heat exchanger with high heat exchange efficiency. Since the heat exchange surfaces of the heat exchanger are primary primary surfaces, Therefore, the heat transfer resistance is reduced, the heat exchange efficiency is improved, the problem of the vehicle engine warming up and starting time in the low temperature environment is too long, the environmental adaptability of the vehicle is improved, and the vehicle is quickly and reliably started in the low temperature environment.

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