Why do traditional resistors fail in home appliance temperature control?

Is the temperature control accuracy of household appliances unstable? How to achieve stable output at ± 0.1 ℃ for TCR3750 thin film platinum resistance?

In scenarios such as variable frequency regulation of air conditioners, zoning and preservation of refrigerators, and precise temperature control of ovens, household appliance temperature control film platinum resistors are solving the problem of precision drift above ± 1 ℃ caused by traditional sensors due to environmental temperature differences (± 20 ℃) with "TCR3750ppm/℃ high precision+miniaturized design"

H2: The two traditional pain points of home appliance temperature control

H3: Sensitivity to environmental temperature difference: Traditional sensors have a narrow temperature range (-20~85 ℃), with accuracy drift of ± 1.5 ℃ during high temperatures in summer (45 ℃) and low temperatures in winter (-10 ℃), resulting in frequent start stop of air conditioning and frosting of refrigerators;

H3: Limited installation space: Rigid sensors have a large volume (≥ 8 × 5mm), squeezing the PCB motherboard space (occupying more than 15% of the board area), which affects the miniaturization design of home appliances.

H2: Adaptability of TCR3750 Thin Film Platinum Resistors to Home Appliance Scenarios

Our home appliance temperature control film platinum resistor (pt100/pt1000) has a TCR accuracy of 3750ppm/℃ and a wide temperature range of -70~200 ℃, covering extreme environments worldwide. With anti-interference algorithms, the accuracy remains ± 0.1 ℃ even when the measured environmental temperature difference is ± 30 ℃ (far exceeding the national standard of ± 0.5 ℃).

H3: Miniature design: With a volume of only 4 × 2 × 0.05mm (smaller than sesame), it can be attached to PCB edges or narrow corners without occupying the main functional area, helping to promote the trend of "ultra-thin body" in home appliances;
After being used by a certain air conditioning faucet manufacturer, the complaint rate for temperature control accuracy has dropped from an average of 50 per month to 3, and energy consumption has been reduced by 12%. This is precisely the value of home appliance temperature control film platinum resistors.

H3: Anti vibration and shock: Passed 10G vibration test (simulating the vibration of household appliances during transportation/operation), with no wire breakage/accuracy drift, and a lifespan of>10 years.

H2: Practical case: A brand's variable frequency air conditioning temperature control upgrade project

Scenario: A certain brand's "Zhenjing" series variable frequency air conditioner (indoor unit PCB space is only 20 × 15mm, requiring monitoring of evaporator/condenser temperature)
Solution: Customized 4 × 2mm PT1000 thin film platinum resistor (attached to evaporator pipeline)+digital interface (directly connected to the main control chip)
Effect: Temperature control accuracy ± 0.1 ℃, compressor start stop frequency reduced by 40%, annual power consumption saved by 30 kWh per unit, product premium increased by 15%.

TCR accuracy (3750ppm/℃± 0.1%, ensuring temperature linearity)
Temperature range (-70~200 ℃ wide temperature range, covering global climate)
Size (≤ 5 × 3mm, suitable for small PCBs)
Certification (RoHS environmental protection+CE safety, worry free export)

Technical Specification for Temperature Control of Household Refrigeration Appliances (GB/T 8059-2016)
Temperature Control Upgrade Test Report for a Certain Air Conditioning Manufacturer (2024)
SGS Wide Temperature Range Stability Certification (Report Number: SH-SGS-202408)
Say goodbye to temperature drift and space anxiety, the platinum resistance film for home appliance temperature control is the core guarantee for the "precise and comfortable" experience of home appliances.
Author Information: Wang Gong | Expert in Home Appliance Sensor Application (15 years of experience in researching and developing electric heating management, leading 5 popular air conditioning sensor solutions)

Q1: Can the sensor withstand the erosion of condensed water from household appliances?
A: Adopting polyimide packaging (waterproof rating IP67), it has passed the 72 hour condensate immersion test.
Q2: Does it support direct connection with mainstream home appliance control chips (such as STM32)?
A: Provide standardized digital interfaces (I2C/SPI) that are plug and play, without the need for additional conversion circuits.

Xi'an Tongzida Technology Co., Ltd. is a leading manufacturer and supplier of advanced thermistor technology, dedicated to providing high-performance temperature sensors for demanding industrial applications. We have comprehensive expertise in microsensor manufacturing technology, special packaging technology, and multi-sensor integration methods to ensure excellent performance and reliability of thermistors. As a trusted supplier of precision temperature measurement solutions, we offer a complete thermistor system, including core sensitive chips, testing systems, and analysis software. Please contact our technical experts sales11@xatzd.com Discuss your specific thermistor requirements and learn how our advanced resistor temperature optimization and manufacturing capabilities can improve the performance and reliability of your temperature measurement system.