Method for producing hot water by air compressor waste heat and water heating machine adopting the method

Abstract

The invention relates to a method used for preparing hot water by the waste heat of an air compressor, comprising the following steps: (1) the front of an oil wind cooler of the air compressor is provided with a heat exchanger and a temperature control valve; the heat exchanger comprises an air path part, a water path part and an oil path part; an oil cooling circuit is formed between the air compressor, the oil gas barrel of the air compressor, the temperature control valve, the oil path part of the heat exchanger and the oil wind cooler of the air compressor; (2) the air path part of the heat exchanger is connected with the pressure retaining valve of the air compressor; the air outlet of the air path part is connected with the wind cooler of the air compressor; the compressed air is exhausted after passing through the oil gas barrel, the oil / gas separator of the air compressor, the pressure retaining valve, the air path part of the heat exchanger and the wind cooler; (3) the water inlet of the heat exchanger is connected with a cold water pipe which is provided with a tap water adjusting valve and an electromagnetic valve; the water outlet of the heat exchanger is connected with a heat water pipe; the end of the heat water pipe is connected with a temperature preservation hot water tank; the method used for preparing hot water by the wasted heat of an air compressor also discloses a hot water machine which adopts the method.

Description

technical field [0001] The invention relates to the technical field of environmental protection and energy saving, in particular to a method for heating hot water by utilizing waste heat of an air compressor and a water heater adopting the method. Background technique [0002] The air compressor in the prior art is similar to a heat pump. The heat source comes from the air. The air compressor doubles the air, and the temperature in the compressed air increases proportionally. By increasing the compression ratio and compression speed of the air, high pressure and high temperature compression can be generated. Air. When the compressed air is released, the discharge port will be frosted; the expansion of the compressed air will absorb heat and cool; therefore, the waste heat generated by the air compressor can be greater than or equal to the power of the air compressor motor. Because the air compressor produces a lot of waste heat, it will cause the machine and oil to overheat...

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Problems solved by technology

[0004] Some people have recovered part of the waste heat from the air compressor oil or compressed air to make hot water. Because the equipment is simple, only part of the waste heat can be recovered. The original cooling system still needs to be used, and the newly added heating equipment also increases the power consumption, so Less energy saving, less emission reduction, and there is no control linkage between the air compressor and the hot water making equipment, and the change of the air compressor condition cannot be controlled, so it is harmful to the air compressor

[0005] There is a heat recovery hot water machine on the market, which is a circulating mixed-flow heating type. Its structure is to extend the oil pipe of the air compressor into a water tank, and transfer the heat to the water in the water tank through heat transfer. Set a temperature value, and when the water temperature reaches that temperature, all the water will be pumped out, and then cold water will be added. This structure will cause the following problems: 1) The oil is cold when the water is cooled, and the oil is hot when the water is hot, so it cannot be controlled at a constant temperature value, which is not conducive to the lubrication and sealing of the air compressor; 2) the cold water cannot be continuously fed into the hot water, and the water production is small; 3) the outlet water temperature is low, and the water temperature fluctuates greatly; 4) only part of the heat in the oil is recovered, and the air and the body dissipate heat , The heat dissipation of the motor is not recovered; 5) Continue to discharge waste heat to the atmosphere; 6) Troublesome operation; 7) There is no mutual benefit and mutual protection effect with the air compressor; 8) It is not energy-saving and increases electricity consumption

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