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What are the antifreeze methods of plate heat exchanger?

October 13, 2020

First of all, the reason why the internal temperature of heat exchange equipment is below 0 degrees:

1. When the water temperature becomes low, the refrigerant channel is blocked or the distribution of refrigerant is uneven.

2. Local blockage or small water flow occurred in the runner.

Now that we know the reason, we must know the Plate heat exchanger frost protection method!

1. Insulation materials can be used for winding, especially for water supply facilities in the shade, and the inlet and outlet pipes and valves of the water tank should be thickened.

2. For the water meter installed outdoors or in the well, remove the water in the well and keep it dry. Fill the water meter with sand to the edge.

3. The outdoor water pipes should also be wrapped with insulation materials, which should be tightly wrapped and kept in a dry state without humidity. Finally, plastic bags should be put on for secondary protection.

4. If the water pipe has been frozen, open the valve, keep warm with a hot towel, and then thaw the water slowly along the faucet toward the water pipe with warm water.Do not use tools to violently open water pipes.If there is no running water when the warm water reaches the water meter, it means that the water meter is frozen. Thaw with the above method. Cover with a hot towel and pour with warm water.

5. Protective measures can be taken on the water side. Install a filter screen on the inlet pipe (1mm impurities can be filtered).Or in the inlet and outlet water, install the temperature sensor, set the temperature in the inlet and outlet water pipe respectively, when the temperature is less than the set value, the compressor stops.

6. Differential pressure sensor or flow switch can also be set in the inlet and outlet pipelines. If the set value is not reached, the machine will stop.

7. At present, a new anti-freezing method is very useful. It can improve the medium temperature of Plate Heat Exchanger, pre-increase the temperature of fresh air, and commonly use steam heating or electric heating.It is also possible to increase the temperature by secondary use of energy, which may lead to frosting of the Heat Exchanger and thus ice blocking.


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