Detachable anti-scaling efficient evaporator for water source heat pump

Abstract

The invention discloses a detachable anti-scaling efficient evaporator for a water source heat pump, and belongs to the technical field of evaporators for water source heat pumps and hot water units.The evaporator comprises a shell, a cover plate, flow guide plates, a heat exchange straight pipe and a heat exchange pipe bend, the shell and the cover plate are fixedly connected in a seal manner, the shell is provided with a water inlet flange, a water outlet flange and a sewage draining exit, the flow guide plates are mounted in the shell, the flow guide plates are mounted in an up and down staggering manner at equal distances, the heat exchange straight pipe is mounted in the shell, and penetrates through the flow guide plates to be fixedly mounted, joints on the two ends of the heat exchange straight pie are arranged outside the shell, and the ends of the heat exchange straight pipe are connected through the heat exchange pipe bend. According to the evaporator for the heat pump and ahot water unit, a new heat exchange pipe bundle layout is adopted, due to a non-pressure container type, dismounting, mounting and cleaning at any time can be facilitated, dirt, filth blockage and corrosion problems can be effectively solved, and the reliability is extremely high.

Description

technical field [0001] The invention belongs to the technical field of evaporators for water source heat pumps and hot water units, and in particular relates to a detachable and anti-scaling high-efficiency evaporator for water source heat pumps. Background technique [0002] The water source heat pump is a product that realizes the transfer of low-level heat energy to high-level. In the application of the same project, it saves more than 1 / 2 of the energy compared with the coal-fired boiler, and saves more than 2 / 3 of the heat energy compared with the electric boiler heating, which has good energy saving performance. And because it is environmentally friendly and has no emissions, it is beneficial to the environment and has been vigorously promoted throughout the country. At present, the national construction department has set up pilot cities for the promotion of water source heat pump technology, and many major cities have carried out the promotion of water source heat p...

AI Technical Summary

Problems solved by technology

But there are four problems with this method. First, the heat exchange tubes are all composed of several arc-shaped tubes. The solder joints are dense and hidden dangers are easy to leak, and the solder joints are weak points. The surface is not smooth, and it is easy to corrode from the solder joints.

Even because there are many turns and dead angles covered, the unevenness of the connecting solder joints affects the compactness of the anti-corrosion layer, making it impossible to carry out anti-corrosion coating construction

The second is that the resistance loss of the inner core pipeline composed of continuous arc-shaped bends is too large. According to the former Soviet expert Yijierichike ИЕ, hydraulic friction (M) (translated by Huang Jun, Xia Songyou), and the domestic "Practical Fluid Resistance Handbook" Hua According to Shaozeng's (1985) discussion, the larger the turning angle, the more obvious the dissipation of the main kinetic energy. The bending angle of the heat exchange tubes exceeds 180°, and this connection and turning structure will greatly reduce the actual effective area of ​​the heat exchange tubes , so the effective heat exchange area per unit volume cannot be increased. Only by wasting more pipelines to make up for the loss or using a larger evaporator can the ideal heat exchange effect be achieved. This does not enhance heat transfer and increases unnecessary economic input

The third is that the continuous arc-shaped tube cannot be fixed by the deflector, the vibration of the tube bundle will accelerate the metal fatigue, and the heat exchange tube will be damaged soon. The comparative issues in the

Fourth, the existing deflector makes the flow of the two media flow in a forward state, and does not make the fluid and the tube bundle flow in a transverse direction, so that the flow boundary layer and thermal boundary layer of the medium cannot be effectively fractured and reorganized, and it is also impossible to achieve strengthening. heat transfer

[0006] To sum up, the disadvantage of the existing technology is that it is impossible to guarantee both the anti-fouling corrosion performance of the heat exchanger and the high efficiency of its heat transfer performance, and it is impossible to give consideration to both quality and efficiency.

The evaporator with a slightly stronger heat exchange capacity cannot be disassembled and washed, and problems such as dirt and blockage will make the heat exchanger unable to work soon

A heat exchanger with a wide flow channel and strong resistance to dirt and blockage has low heat exchange efficiency, and many qualification conditions are required for production and after-sales maintenance. Once maintenance is required, it can only be carried out by units that meet the corresponding qualification level. Inconvenient and difficult to respond in a timely manner

From the perspective of anti-corrosion, only the shell-and-tube heat exchanger of the above types of evaporators can adopt the anti-corrosion coating process, but the heat exchange capacity of the shell-and-tube heat exchanger itself is far inferior to the other two, and due to its own other problem, obviously cannot be an ideal evaporator

[0007] Based on the above reasons, due to the lack of evaporator design and manufacturing technology, the wide application of a series of heat pumps and hot water units is limited.

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