The core component of refrigeration in the high and low temperature test chamber is the compressor. The function of the compressor is to raise the pressure and raise the suction pressure state to the discharge pressure state. During the operation of the high and low temperature test chamber, many failure problems may occur, such as the temperature cannot drop, the humidity is not displayed, and the exhaust volume is insufficient. Insufficient displacement is one of the most prone faults of compressors. What should we do when we encounter insufficient displacement? The following is an analysis of the production experience of Lin Pin Instruments combined with the technical department for many years: 1. Malfunction of the intake filter: clogged fouling reduces the exhaust volume, the intake pipe is too long, and the pipe diameter is too small, resulting in increased intake resistance and affecting the air volume. The filter must be cleaned regularly. 2. The reduction of the compressor speed reduces the discharge volume: the air compressor is used improperly, because the discharge volume of the air compressor is designed according to a certain altitude, suction temperature and humidity, when it is used above the above standards When on the plateau, the inspiratory pressure decreases, etc., the exhaust volume will inevitably decrease. 3. The spring force of the gas valve is not well matched with the gas force. If the spring force is too strong, the valve plate will open slowly, and if the spring force is too weak, the valve plate will not close in time. These not only affect the gas volume, but also affect the power increase and the gas valve. The life of the leaf and spring. At the same time, it will also affect the gas pressure and temperature changes. 4. Improper compression force of the compressed air valve. If the pressing force is small, air leakage is necessary. Of course, too tight will not deform the valve cover. The general pressing force can be calculated by the following formula: p = kπ / 4 D2P2, D is the valve cavity diameter, and P2 is the maximum gas Pressure, K is a value greater than 1, generally 1.5 to 2.5, K = 1.5 to 2.0 at low pressure, K = 1.5 to 2.5 at high pressure. K is selected in this way, and practice has proved to be good. If the gas valve fails, the valve cover will inevitably heat up, and the pressure will be abnormal. Puyang Optimus Household Products Co., Ltd , https://www.magicspongecn.com