The chiller is a cooling water equipment that can provide constant temperature, constant flow and constant pressure. The industrial water chiller can always output ice water that is lower than the ambient temperature. It can be used wherever cooling is needed, either directly or indirectly. The chiller can be used to cool the injection mold and improve the quality of plastic products; Vacuum coating cooling, control the temperature of vacuum coating machine; Food industry cooling, rapid cooling processing; Chemical industry, effectively control the temperature of chemicals; Building cooling, rapid cooling and condensation of concrete, etc. Water chillers are widely used. Cooling Mold Chiller,Injection Molding Chiller,Chiller Used In Injection Molding,Cooling Mold Chiller Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachine.com
Water chillers can be divided into industrial water chiller, screw water chiller, electroplating water chiller, oxidation water chiller, laser water chiller, coating water chiller, wave soldering water chiller, reflow soldering water chiller, exposure machine water chiller, developer water chiller, ultrasonic water chiller, extruder water chiller, high-frequency quenching water chiller, Injection Molding Machine water chiller, electrophoresis paint water chiller Pharmaceutical special water chiller, food special water chiller, stainless steel water chiller, circuit board water chiller, plastic suction machine special water chiller, chemical water chiller, coating water chiller. According to working conditions, it can also be divided into air-cooled water chiller, water-cooled water chiller, low-temperature water chiller, thermostatic water chiller, etc
Energy saving function of water chiller:
The water chiller is a kind of refrigeration equipment that cools water and recycles it. The cooling water temperature can be adjusted automatically according to the requirements, almost without water consumption. Long-term use can save a lot of water. Therefore, compared with the mode of using tap water discharge to cool the equipment, the industrial water chiller is an ideal equipment that can quickly achieve the desired cooling effect and save energy.
About the function of the chiller, I will introduce it here today. Chillers play an important role in industrial production. Enterprises use chillers to improve production efficiency, ensure product quality and increase profits.
1. Regularly check whether the voltage and electric flow of the water-cooled chiller are stable, and whether the compressor operates normally. If it is a semi-closed compressor, regularly check the oil volume, which should be more than 2/3 of the window. When the water-cooled chiller works normally, the voltage is 380V and the current is within the range of 11A-15A.
2. Regularly check whether the refrigerant of the water-cooled water chiller has leakage: it can be determined by referring to the parameters displayed on the high and low pressure gauge on the front panel of the host. According to the temperature change of air temperature (winter and summer), the pressure display of the water chiller is also different. When the water chiller works normally, the high pressure display is 11-17kg, and the low pressure display is 3.5kg-5kg, which are normal.
3. Check whether the cooling water system of the water-cooled water chiller is normal, whether the fan and sprinkling shaft of the cooling water tower are in good operation, and whether the make-up water of the built-in water tank of the water-cooled water chiller is normal. The water-cooled chiller should be replaced with new water once every three months. If it cannot be replaced, please add rust remover.
4. All industrial water chillers should be cleaned once a year when they are used for six months. The main cleaning parts include cooling water tower, cooling water pipe and condenser to ensure better cooling effect.
5. When the water-cooled chiller is not used for a long time, the circuit switches such as the main power supply of the water pump, compressor and Cooling Tower should be turned off in time. The water-cooled water chiller needs to be connected with the cooling water tower and the circulating water pump to achieve the cooling effect. In order to ensure the quality of the circulating water, it can be considered to install a Y-type filter at the water source and add algaecide and scale remover to the cooling water tower to prevent impurities from entering the pipeline and affecting the operation of the unit.
China has prepared high-detection, fast response speed, etc.
[ Instrument Network Instrument Development ] Recently, solid silver/titanium oxide Schottky diodes have made progress in the research of thermal electronic photodetectors. Related research results were published on Nanophotonics (Nanophotonics, 8(7), 1247-1254 (2019)).
Figure 1. The structure of the detector and the photoresponse process involved in the separation of thermionic electrons. (A) Schottky-type current-voltage curve of a hole array silver/titanium oxide composite film under vacuum. (B) SEM photograph of a silver/titanium oxide composite film. (C) Spectral response of the pore array silver/titanium oxide detector. (D) The energy band of the isothermal thermal electrons participating in the photocurrent response
Light can excite the plasma element on the surface of the metal, and the plasma element can further excite high-energy hot electrons. These hot electrons can form a current across the metal/semiconductor Schottky junction, thereby realizing the transition of light to electricity and achieving photoelectricity. probe. Thus, a new plasmon-coupled thermal photodetector composed of a metal/semiconductor Schottky junction has recently been developed. Compared with traditional semiconductor detectors, this detector has the special advantage that it can detect photons with energy less than the semiconductor band gap, and its response wavelength can be controlled and continuously adjusted by controlling the metal nanostructure. In recent years, most of the research on plasmon thermal electron photodetectors has focused on the improvement of the responsiveness of thermal electron detectors, and the lack of performance and detection speed, which are crucial in the field of photoimaging and optical communication. Research.
The silver/titanium oxide Schottky junction is considered to be an ideal thermal electron detector construction material. On the one hand, silver has a high isotropic local field and a narrow thermal electron energy distribution, which can produce high photoelectric conversion efficiency. On the other hand, titanium oxide has a high density of conduction band states, facilitating rapid transfer of electrons. Therefore, a thermal electron detector based on a silver/titanium oxide Schottky junction is expected to have a high detection rate and a fast response speed.
Solid state researchers prepared plasmon-based thermo-electronic photodetectors based on a hole array silver/titanium oxide Schottky junction (Fig. 1). The detector exhibits fast response speed and high detection rate. The light response rise and fall times are 112 μs and 24 μs at a wavelength of 450 nm and zero bias, respectively, and the detection rate is 9.8 × 1010 cmHz1. /2/W (Figure 2), both performance indicators are higher than previously reported in the literature. Further, they increased the optical responsivity of the device from 3.4 mA/W to 7.4 mA/W by lowering the Schottky barrier height. Related research provides reference and guidance for the development and performance improvement of plasmon thermal electron photodetectors.
This research work was supported by the National Natural Science Foundation of China and the CAS/SAFEA International Innovation Research Team.
(Original title: Isothermal electronic photodetectors with high detection rate and fast response speed prepared by solid state)