Indoor formaldehyde removal

1) Ventilation is the most effective and economical method. It should be ventilated as much as possible, irrespective of the presence of people in the home. On the one hand, the dilution effect of fresh air can dilute the indoor pollutants, which is conducive to the discharge of indoor pollutan

Solenoid valve failure and troubleshooting

Solenoid valve failure will have a direct impact on the switching valve and regulating valve action, the common fault solenoid valve does not act, should be checked from the following aspects: (1) Solenoid valve loose or thread head off, the solenoid valve can not be tight, tight Thread fixed h