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Home > News > What are the air conditioning temperature sensors? Air conditioning temperature sensor principle.

What are the air conditioning temperature sensors? Air conditioning temperature sensor principle.

2018-02-06

Air conditioning is now very important in our lives, and the main working part of the air conditioner is the compressor, and the compressor is adjusted according to the air conditioner Temperature Sensor , so the temperature sensor is crucial. So what are the air conditioning temperature sensors? What is the principle of air conditioning temperature sensor? The following decoration house decoration network Xiaobian will answer for you one by one, I hope everyone can help after reading.

What are the air conditioning temperature sensors?

1. Room temperature sensor: It mainly detects the indoor temperature. When the indoor temperature reaches the set requirement, the internal and external machines are controlled. When the cooling is stopped, the external machine stops, and the internal machine continues to run.

2. Indoor tube temperature sensor: It mainly detects the coil temperature of the indoor evaporator, and plays the role of anti-cold wind, anti-overheat protection and temperature automatic control during heating.

3, outdoor defrosting temperature sensor: mainly detects the outdoor condenser coil temperature, when the outdoor coil temperature is lower than-6 degrees Celsius for 2 minutes, the internal machine turns into a defrosting state, when the outdoor coil sensor resistance is too large The indoor unit does not work properly.

What is the principle of air conditioning temperature sensor?

The temperature sensor used in air conditioning mainly uses a negative temperature coefficient thermistor (also known as NTC Thermistor). The temperature sensor is made of a metal oxide such as manganese, cobalt, nickel or copper and is made of a ceramic process. These metal oxide materials all have semiconductor properties because they are completely similar in electrical conductivity to semiconductor materials such as germanium and silicon.

When the temperature is low, the number of carriers (electrons and holes) of these oxide materials is small, so the resistance value thereof is high; as the temperature increases, the number of carriers increases, so the resistance value decreases. When the temperature changes, its resistance also changes. When the temperature rises, the resistance value becomes smaller, and the temperature decreases, and the group value increases. For example, the following figure shows the characteristic curve of some tube temperature sensors of a certain brand.

What are the air conditioning temperature sensor faults?

1. The resistance value of the indoor ring temperature sensor becomes larger, causing the air conditioner to start frequently.

2. The resistance of the indoor tube temperature sensor becomes smaller, which causes the whole machine to be protected soon after starting.

3, indoor temperature, tube temperature temperature performance changes, causing air conditioning work disorders.

4. The indoor tube temperature change value is 0 Ω, which causes the whole machine to start remotely without reaction.

The above is what the air conditioning temperature sensor brings to you? The whole content of the principle of air conditioning temperature sensor, I believe that everyone has a basic understanding of air conditioning temperature sensor after reading this article.

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