| 摘要 |
<p>A positive and negative pressure compensation device, comprising a housing (8); the housing (8) is provided with a piston (3) therein, and is partitioned into a first adjustment chamber (9) and a second adjustment chamber(12) sealed relative to each other via the piston (3); a plurality of uniformly-distributed air holes (11) are disposed at one end of the housing (8) corresponding to the second adjustment chamber (12); the air holes (11) communicate with the second adjustment chamber (12); a plurality of uniformly-distributed air outflow ports (7) are disposed on the peripheral surface of the housing (8) corresponding to the first adjustment chamber (9); the air outflow ports (7) communicate with the first adjustment chamber (9); the first adjustment chamber (9) is provided with an adjustment spring (4) therein; one end of the adjustment spring (4) is fixedly connected to the housing (8), and the other end of the adjustment spring (4) is connected to the piston (3); the piston (3) can move within the housing (8); when the piston (3) moves within the housing (8) away from the air holes (11), the air outflow ports (7) can communicate with the air holes (11). The device can maintain the stability of the positive and negative pressure, and is simple and compact in structure, easy to install and use, energy conserving, environmentally friendly, low in use cost, as well as safe and reliable.</p> |
