1, the main technical performance of the vacuum pump (such as vacuum) to meet the design requirements or process requirements, auxiliary equipment (condenser, etc.) complete; not prepared smooth operation, normal sound, no overheating, closed well. 2, rotary vane vacuum pump equipment lubrication system intact, lubricants meet the regulatory requirements, and regularly check, oil change. 3, all kinds of instruments (such as vacuum gauges, etc.) indicate the correct value, and regularly check; each valve opening and closing flexible, good seal, no leakage; pipeline leaks and regular inspection. 4, the motor is equipped with reasonable, normal operation (normal temperature and sound), electrical lines safe and reliable, ground protective measures, electrical installations (control cabinet) reliable, electrical instrumentation instructions; safety guards are complete. 5, equipment and cooling system clean and tidy, no rust. 6, water ring vacuum pump cooling system is operating normally, the cooling device intact, the drainage temperature does not exceed the required requirements, there should be water protection device. In general, the working fluid used is water. The energy acting on the rotor impeller is received by the liquid and transferred to the compressed gas, thus causing the temperature of the water ring to rise. A portion of the water in the ring is compressed with the gas to exclude the pump. Most of the heat generated during the compression is taken away. Therefore, it is necessary to constantly replenish the fresh water so that the working temperature of the water ring pump can be kept constant. In most water ring vacuum pumps, the operating temperature is about 15-20 ° C, depending on the temperature of the water being replenished. In fact, the ultimate pressure of the water ring pump is not very important, because different liquids, when the pressure is lower than 50-60hPa, cavitation will occur, the pump parts will be damaged. When the pump approaches the limit pressure, the pumping speed is very low and the water at the pump inlet starts to boil. As you go to the outlet of the pump, the bubbles that form begin to crack. This will produce a lot of noise, while the pump drive wheel and pump chamber and other components are gradually destroyed. This phenomenon is commonly referred to as cavitation. Once cavitation occurs, introduce a small amount of fresh air through the valve. In this case, a hole was made in the entrance gate to allow for some fresh addition to the volume, and cavitation did not occur if a gas jet was used.
When people come into hotel room or bathroom, the music will Music rang out. Background Music panel size is 86mm*86mm; the bottom box is standard 86 installed, the installation does not have special requirements, can cover the unsightly if the wall hole size is too large. Meet the bottom box installation and veneer open holes; it can be installed separately, also can install combine panel; Using aviation aluminum alloy, IPHONE technology CNC carving molding; A variety of colors can be customized. Input voltage: AC220V; one road IO input, you can start the preset music, used as shower music, also can be used for other input control;One road IO output , it can interact with the RCU, to achieve the preset scene control, such as wake up scene; Built-in MD card, with a simulation nature music , built in a number of classic light music for guests to choose;Built in Bluetooth module, you can communicate with the mobile phone easily , and play the phone's music. Display the current time on the standby screen. Can be used independently,also can be used with RCU to form a system.
Function:
1. This plastic ceiling speaker mount adopt ABS enclosure, alumnuim mesh cover long-term durability, never out of shape and fading.
2. High sensitivity, clear and sonorous sound.
3. The ceiling speaker mount is ideal choice for industrial and commercial application in hotel, school, factory, bathroom, meetting room, office building, home and other place where the background music and paging is needed.
4. Competitive factory price, big discount for big order.
Background Music System And Speaker
Background Music,Music Player,Music System,Background Music System
Shenzhen Zhuohao Intelligent Electronic Development Co., Ltd. , http://www.szactop-smart.com