4results about How to "Reduce filling" patented technology

A novel plate heat exchanger absorption chiller belongs to the field of heat exchange equipment technology. It employs a two-stage low-temperature heat return system, a refrigerant plate heat exchanger, and a first-stage low-temperature heat return system connected in series and in parallel with the low-temperature heat exchanger. A dilute solution is heated by heat from the shell side and collected before entering the plate low-temperature regenerator. In the plate low-temperature regenerator, it is heated by high-temperature refrigerant vapor from the plate high-temperature regenerator, concentrating it into an intermediate concentration solution. This intermediate concentration solution is then pumped through an intermediate liquid pump, exchanging heat with the high-temperature heat exchanger and the parallel high-temperature heat return system, before entering the plate high-temperature regenerator. There, it is heated by external steam to generate refrigerant vapor, concentrating it into a high-concentration absorbent. Finally, it returns to the absorber to absorb refrigerant vapor generated from evaporation in the evaporator, diluting it into a dilute solution. This invention effectively reduces the overall solution filling volume and unit cost, significantly improves the unit's heat exchange efficiency, effectively stabilizes the liquid level, ensures stable unit operation, and enhances the unit's operational safety.

The present application belongs to welding process, and particularly relates to a narrow-gap all-position TIG automatic welding process. The narrow-gap all-position TIG automatic welding process comprises the following steps: 1) performing backing welding on a root bevel and a bottom of the bevel; 2) performing filling welding on a lower bevel and a groove, wherein the filling welding is single-layer multi-pass welding; and 3) performing covering welding on a top of the groove, wherein the covering welding adopts linear welding or oscillating welding. The present application has the following beneficial effects compared with the prior art: the groove of the narrow-gap automatic welding process is narrow, the filling amount of the welding deposited metal is small, and the welding cost is relatively low. The weld is lossless, and the pass rate of the physical and chemical detection is relatively high.

A longitudinal coupling acoustic filter relates to a film radio frequency acoustic wave filter. Comprising a coupling layer and two piezoelectric transduction structure layers arranged above and below the coupling layer. The piezoelectric transduction structure layer sequentially comprises a first electrode layer, a piezoelectric layer and a second electrode layer from top to bottom, and the second electrode layer of the piezoelectric transduction structure located above the coupling layer and the first electrode layer of the piezoelectric transduction structure located below the coupling layer are jointly grounded; the coupling layer comprises a plurality of cavity parts and supporting parts, the plurality of cavity parts are arranged in an array, and the plurality of supporting parts form a grid structure. The coupling layer composed of the cavity part and the supporting part is adopted, the air filling amount is effectively reduced, the acoustic impedance of the coupling layer is weakened, acoustic connection of the piezoelectric transduction structures at the upper end and the lower end is affected, and then stray generated near a pass band is restrained.

The invention discloses a real-time temperature control type immersion heat dissipation system and method based on the calorific value of computing power equipment, and relates to the field of immersion type liquid cooling heat dissipation. The system comprises a temperature monitoring unit integrated in a machine case unit, the machine case unit with a thermal load partition and an outer loop heat dissipation unit, the interior of the machine case unit is divided into three independent partitions, namely a high-heat partition, a medium-heat partition and a low-heat partition, the three independent partitions are matched with IT equipment with different heating intensities respectively, and each partition is provided with an exclusive temperature sensor, a flow field control device and a drainage pump; the flow field control device comprises an axial vortex generation pump, a Bernoulli principle flow deflector and a wave-shaped flow guide block, the flow field is optimized, and the use amount of cooling liquid is reduced; the temperature monitoring unit synchronously acquires the partition temperature and the chip core temperature, and intelligently switches between a natural circulation mode and a forced external circulation mode; accurate temperature control and quick response are achieved, the using amount of cooling liquid is reduced, and the heat dissipation efficiency and the energy-saving requirement are both considered.