Damage to the internal thermal insulation (rock wool) can cause condensation on the outer casing and increased power consumption.
3. Refrigeration system consumables (compressor, circuit components)
Filter drier
Absorbs moisture and impurities in the refrigerant lines; clogging leads to slow cooling and compressor overload alarms.
Replacement cycle: 2–3 years; must be replaced during refrigeration system repairs.
Refrigeration Compressor Lubricating Oil (Refrigeration Oil)
Added during compressor maintenance or replacement.
Refrigerant (R404A / R23)
Replenished after refrigerant leaks,a consumable item.
Solenoid valve seals, capillary tubes
Seals in the refrigeration circuit age, leading to refrigerant leaks.
4.Temperature and humidity sensor consumables
Temperature and humidity sensor probe (PT100 Platinum Resistance)
Prolonged exposure to high humidity causes probe oxidation and scaling, leading to significant display deviations; requires periodic replacement or calibration.
Wet-bulb gauze (Specific to humidity detection, fastest-consuming item)
Wraps the wet-bulb probe to measure humidity via water evaporation, prone to dust accumulation, mold growth, hardening, and loss of function.
Replacement cycle: 7–15 days under normal use; a key maintenance consumable for the customer.
Dedicated wet-bulb water reservoir
5. Fan and air duct consumables
Circulation fan impeller (Fan blades)
Deformation due to long-term thermal fatigue (high/low temperatures) and imbalance caused by dust accumulation; leads to abnormal noise.
Fan bearings and motor carbon brushes
Bearing noise or reduced motor speed leads to uneven temperature and humidity distribution inside the chamber.
Air Duct filter mesh
Prevents sample dust from entering the evaporator; clogging causes a drastic drop in cooling and humidification efficiency.
Cleaning cycle: weekly; replace immediately if damaged.
6. Electrical and heating system consumables
Chamber heating element (Stainless steel electric heater)
Failure due to dry firing or corrosion/fracture from scale buildup; results in slow heating or failure to heat.
Solid-state relay (SSR) and AC contactor
Frequent switching of heating/cooling cycles causes contact erosion and temperature control failure.
Overtemperature protection fuse and thermal cut-off switch
Overtemperature protection components,must be replaced after tripping or blowing.
Power cables and high-temperature resistant wiring harnesses
Insulation jackets on wiring harnesses in high-temperature zones age and crack.
