The capillary network simulates the mechanism of leaf veins and human capillaries, consisting of capillaries with an outer diameter of 3.5-5.0mm (wall thickness of about 0.9mm) and water supply and return with an outer diameter of 20mm (wall thickness of 2mm or 2.3mm). Main pipes form a pipe network. The insulation layer, heat dissipation layer, and capillary network are used in combination to form a capillary network heat exchanger, which greatly improves the heat dissipation capacity and application of a single structure of the capillary network and protects the capillary wall from damage. Capillary network plane radiant air conditioning systems generally adopt a small circulation large system method, and use special solutions as the medium, which can avoid system blockage and facilitate control. To achieve higher comfort requirements and avoid condensation, the room should also be equipped with humidity control and fresh air systems. Capillary network production and application technology have previously been highly monopolized by German companies. Beijing Pleifu Environmental Technology Co., Ltd. has broken the monopoly of foreign companies, developed and produced domestic capillary network heat exchangers, and applied for a number of invention patents and utility model patents. And it has entered the mass production stage. In May 2007, the product was inspected at the Air-conditioning Institute of the China Academy of Building Sciences (National Air-conditioning Equipment Purchase Supervision and Inspection Center). Taking the test of a certain node as an example, the results are as follows: 1. When the experimental pressure is 1.5Mpa, there is no leakage; 2. When the water supply temperature is 45°C, the return water temperature is 40°C, the reference temperature is 20°C, and △T=22.5°C , equivalent to the heat dissipation per unit area of ??the sample Qdr = 240.88W/m2; 3. When the water supply temperature is 15°C, the return water temperature is 20°C, the reference temperature is 26°C, △T8.5°C, the equivalent cooling capacity per unit area of ??the sample Qdl = 122.84W/ m2.