resistance furnaceIt is a universal device that uses resistance heating elements to achieve heating, with a temperature range covering room temperature to 1200 ℃. It is widely used in fields such as mechanical manufacturing, electronics, chemical engineering, and laboratories, and can complete various processes such as metal annealing, tempering, drying, curing, and sample heating. It has the characteristics of simple structure, low cost, and convenient maintenance.
The core of its working principle is the "Joule effect": current passes through the resistance heating elements inside the furnace (such as nickel chromium alloy wire, iron chromium aluminum alloy wire), which convert electrical energy into heat energy and heat the furnace cavity and sample through radiation, convection, and conduction. The temperature control system adopts a digital temperature controller, which supports manual or automatic temperature control. The temperature control accuracy is usually ± 3 ℃, meeting most conventional heating needs. The furnace body adopts a steel structure shell and is filled with lightweight insulation materials (such as perlite and rock wool) to balance insulation effect and cost.
In terms of structural design,resistance furnaceFocus on "universality+convenience". The common type is box type resistance furnace, with furnace chamber capacities ranging from 10L to 1000L, suitable for samples of different sizes; The furnace door adopts side opening or upward opening, equipped with a safety lock to prevent accidental opening; Some small laboratory models are compact in size (approximately 500 × 400 × 600mm) and easy to move. The heating elements are evenly distributed on both sides or at the bottom of the furnace cavity to ensure uniform temperature inside the furnace (temperature uniformity ≤ ± 5 ℃).
Widely applicable scenarios: used in the field of mechanical manufacturing for annealing treatment of metal parts to eliminate internal stress; Used in the electronics industry for drying and curing electronic components to enhance stability; Used for sample preheating and solution evaporation in the laboratory. Attention should be paid to operation and maintenance: it is strictly prohibited to place flammable and explosive materials inside the furnace; Before heating, check whether the heating element is loose and whether the circuit is damaged; After long-term use, regularly clean the oxide scale and impurities inside the furnace chamber; When the aging of the heating element causes slow heating, it needs to be replaced in a timely manner. When selecting, the appropriate model should be chosen based on the heating temperature, sample size, and processing capacity.