Air Conditioner Temperature Sensor
Item: Air Conditioner Temperature Sensor,with copper head or plastic head
Short description: Used to sensor temperature in air conditioner room.
Epoxy head Sensor 5K for Minisplit
Epoxy head Sensor 10K for Minisplit
Epoxy head Sensor 15K for Minisplit
Epoxy head Sensor 20K for Minisplit
Epoxy head Sensor 25K for Minisplit
Epoxy head Sensor 50K for Minisplit
Copper Sensor 5K for Minisplit
Copper Sensor 10K for Minisplit
Copper Sensor 15K for Minisplit
Copper Sensor 20K for Minisplit
Copper Sensor 25K for Minisplit
Copper Sensor 50K for Minisplit
Types: copper head or epoxy head,wire with plug.
Place of origin: China , Sell to worldwide.
|Order or Inquiry on “Air Conditioner Temperature Sensor”|
|Models and Details on “Air Conditioner Temperature Sensor”|
① Resistance Parameter: R25=15K±1%,B25/50=3950±1%(Take 15K sensor as example)
②Wire: 24#2468 standing 80℃ PVC L=400MM
③Copper head(M5X25) or Epoxy head(M5X15)
Air conditioning temperature head air conditioning temperature sensor
Tube temperature probe size 5mm*25mm
Room temperature probe size 5mm (the thickest part) *15mm
|Item||Testing target||Testing conditions||Min.||Standard||Max.||Unit|
|1||Nominal resistance value||Thermostatic 25±0.05℃||9.8||10||10.2||KΩ|
|2||50℃ resistance value||Thermostatic 50±0.05℃||/||3.5884kΩ||/||KΩ|
|3||Temperature coefficient B values||/||3910||3950||3980||K|
|4||Heat dissipation coefficient||static air||1.5||/||/||mW/℃|
|5||Thermal time value||static air||/||/||20||S|
|6||Insulation resistance||DC=500V static air||100||/||/||MΩ|
|7||The maximum operating current||/||/||/||8||mA|
|8||Rated operating current||/||/||5||/||mA|
|10||Operating temperature range||-50 – +80℃|
|Item||Testing target||Test conditions||△R/R25|
|1||Dry heat storage||80±2℃ in air to stand 1000h。||≤±2%|
|2||Heat storage||Humidity 95%，Temperature 40±2℃ in air to stand 1000h。||≤±2%|
|3||Cold storage||-50±2℃ in air to stand 1000h。||≤±2%|
|4||Wen Chong||-30±2℃，30min；+100-3℃，30min Alternately 20 times，
An interval of time <5s。
|5||Load durability||DC=1mA，TA=40±2℃，Humidity 95%，time 1000h。||≤±2%|
|6||Thermal shock||sample stay +80±3℃,20min，
Cooled at room temperature 20min，Alternately 20 times。
|7||Weldability||Wire stay 235±5℃ Tin bath immersed welding 2±0.5s，Solder coverage area on the wire ≥90%。||≤±1%|
|8||Drop Test||Samples from 1mm height free drop on the board 10 times||≤±1%|
|9||Lead strength||20N lead role in pulling heavy objects 10±1s||≤±1%|
|10||Room temperature drift||Store 1000h at room temperature||≤±1%|
Result:After the above environmental test, resistance was no visible damage.
|Buying Guide to “Air Conditioner Temperature Sensor”|
- The temperature sensor is available for retail and wholesale;
- The place of origin is in China,when you buy one or a small quantity,please consider freight into the cost;
- Accept bulk order with Container delivery;
- More types of temperature sensor for air conditioner are not displayed on the web.If the item above doesn`t meet your requirement,please contact us to email: [email protected] ,we can supply a favourite item you need.
|General Knowledge on “Air Conditioner Temperature Sensor”|
Air conditioner temperature sensor is a negative temperature coefficient thermistor, referred to as NTC, its resistance decreases with increasing temperature, and increases with decreasing temperature. Resistance at 25 ℃ for nominal value. NTC common failure for resistance becomes large, open, damp mildew resistance changes, short circuit, plug and seat a bad contact or leakage, etc., caused by air conditioning air conditioning failure caused by abnormal terminal voltage detection CPU’s. Conditioned common indoor ambient temperature NTC NTC, indoor coil NTC, NTC and other three outdoor coil, more upscale air conditioning also apply outside ambient temperature NTC, compressor suction, exhaust, etc. NTC.
NTC in the circuit, there are two ways:
A temperature change so that the change in resistance NTC, CPU also changes the voltage of the terminal, CPU determines in accordance with a change in voltage of the air conditioner operating state. Ambient room temperature NTC effect: NTC ambient room temperature according to the set of working conditions, indoor environment temperature detection or automatic start-stop frequency. Fixed-frequency air temperature difference between the indoor temperature range for the set value + 1 ℃, that is, if the cooling set 24 ℃, when the temperature drops to 23 ℃ compressor stops, when the temperature rose to 25 ℃ compressor; if the heating set When given 24 ℃, when the temperature rose to 25 ℃ compressor stops, when the temperature dropped to 23 ℃ compressor. Worthy of note is the temperature setting range is usually between 15-30 ℃, so the ambient temperature is below 15 ℃ refrigeration does not work, the heating temperature above 30 ℃ ambient temperature does not work. Inverter air conditioner according to the set temperature and the room temperature difference frequency control, the higher the greater the difference between the operating frequency of the compressor, so soon after the compressor start speed increase. Indoor coil NTC: indoor coil control cold too cold (below + 3 ℃) protection detection, cooling the lack of fluoride detection; anti-cold wind blowing heating, thermal protection testing. Air conditioning and refrigeration 30 minutes to automatically check the indoor coil temperature reach 20 ℃ cool if the automatic diagnosis and the lack of fluoride protection. Ruoyin some reason the indoor coil temperature drops below + 3 ℃ to prevent frost also shut down (too cold) heating the indoor coil temperature is below 32 ℃ within the fan does hair (anti-cold), higher than 52 ℃ outside the fan stops, higher than 58 ℃ compressor stall (overheating); some air conditioning and heating in the automatic control of fan speed, and some air conditioning automatically switches electric auxiliary heat, inverter air speed. Outdoor coil NTC: temperature detection defrost heating, refrigeration condensing temperature detection. Heating heat pump defrost is an important feature, the first frost of CPU timing (usually 50 minutes), after the frost from outdoor coil NTC control (typically -11 ℃ To defrost, + 9 ℃ then heating). Refrigeration condensing temperature of 68 ℃ stop compressors, high pressure switch instead of the role of the reduced frequency inverter cooling coil prevent continue to heat up. Outdoor ambient temperature outside NTC control fan speed, winter warm-up compressors exhaust NTC: make frequency machine down to avoid overheating the outside, the lack of fluoride detection inspiration NTC: controlling the flow of refrigerant, stepping motor control section valve to achieve.
Failure analysis of indoor and outdoor coil:NTC highest failure rate, failure is also a wide range of phenomena. Indoor and outdoor coil temperature at NTC due to the changing position and condensation or high environment, so the failure rate is relatively high. Mainly in the power supply is normal and the machine does not work, the work of a short stop, the fan is not running out of the machine within the normal heating, the fan does not work outside or abnormal shutdown, the compressor does not start, poor frequency, frequency does not work, heating no frost and so on. Defrosting faults can substitute the outdoor coil defrost board NTC or outdoor. NTC also check the room ambient temperature when the power supply and air conditioning does not work properly. Working non-stop air conditioning or reach the set temperature down, it must first check the ambient room temperature NTC, inverter air conditioner is not working properly and it will be relevant. If a problem occurs due to the ambient room temperature NTC will make the CPU misjudged the ambient room temperature and cause malfunction. 1. The room ambient temperature sensor resistance becomes larger, causing frequent air conditioner starts. 2. indoor pipe temperature sensor resistance decreases, causing the machine to start shortly protection. 3. The ambient room temperature, pipe temperature thermal properties change, causing malfunction 4. Indoor air conditioning duct temperature change is 0Ω, resulting in the whole remote boot no reaction 5. air conditioning failure, in addition to the work that satisfies CPU + 5V power reset clock oscillation, but also to measure the power, voltage, current is up and running properly, the detection of the sensor is also very important.