How to judge whether the weather is dry?

Dry weather usually needs to be detected by humidity in the air, which can be tested by the following instruments:

① Detect the humidity detector, as shown in the figure below.

② Dry and wet bulb thermometer, as shown in the figure below.

③ Humidity meter, as shown in the figure below.

④ Intelligent humidifier, as shown below.

Criteria for determining air humidity:

① The relative humidity in summer should be 40%-80%.

② The relative humidity in winter should be 30%-60%.

③ The suitable humidity for the elderly and children is 45%-50%.

④ The suitable humidity for patients with respiratory diseases such as asthma is between 40% and 50%.

If it exceeds the lower limit of suitable humidity, we can all judge it as dry. According to different people, the criteria for judging dryness are different.

Methods of increasing humidity:

(1) Humidify with a humidifier to increase humidity.

(2) Sprinkle water indoors with a brush kettle to improve the humidity through the evaporation of groundwater.

(3) Put some water in the room and evaporate the water according to the temperature.

④ Use air conditioning electric fan (humidifying electric fan) to increase humidity.

Ways to reduce humidity:

① Put some moisture-proof agent or desiccant to absorb the moisture in the air.

② Reduce humidity through the dehumidification function of air conditioner.

(3) filter the air with a dehumidifier to remove the moisture in the air and reduce the humidity.

(4) Keep ventilation and make the room moist.

Note: Keep ventilation to eliminate moisture. Only the outdoor humidity is lower than the indoor humidity, otherwise it will be counterproductive.

Summary: Whether the air is dry or not depends on the fitness of the human body, so it can also be judged according to its own senses. If you don't feel well, it may be caused by dry air or excessive humidity.