Hoshizaki 4A1428-01
THERMISTOR-DEFROST
SKU: HOS4A1428-01
Condition: NEW
The defrost mechanism in a refrigerator heats the cooling element (evaporator coil) for a short period of time and melts the frost that has formed on it. The resulting water drains through a duct at the back of the unit. Defrosting is controlled by an electric or electronic timer: For every 6, 8, 10, 12 or 24 hours of compressor operation it turns on a defrost heater for 15 minutes to half an hour.
A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature, 40°F (5°C) or more, thereby preventing excessive heating of the freezer compartment. The defrost timer is such that either the compressor or the defrost heater is on, but not both at the same time.
A thermistor is a temperature sensor commonly used in restaurant equipment such as ovens, refrigerators, ice machines and other foodservice equipment. It is a resistor having resistance that changes in response to temperature fluctuations. In other words, the resistance of a thermistor increases as the temperature decreases, and vice versa.
Thermistors are often used in restaurant equipment because they are accurate, reliable, and relatively inexpensive. They are also small and easy to install, which makes them a popular choice for use in a wide range of food production and storage equipment. In addition, thermistors respond quickly to changes in temperature, which makes them well-suited for use in applications where the temperature may change rapidly.
Thermistors are typically connected to a control system which allows the equipment to accurately monitor and control the temperature where temperature control is crucial for ensuring food safety and maintaining quality.
HOSHIZAKI ("Hoshi") is the world leader in the design, manufacturing, and marketing of a wide range of products for the foodservice industry including ice machines, refrigerators, freezers, prep tables, display cases and dispensers. Hoshizaki technical pocket guides are available here.
HTS Category Code: 8208.30.00
UNSPC Category Code: 48100000
NAICS Code: 333241
Manufacturer Code: HOS
Width: 3.85 in (9.78 cm)
Height: 1.1 in (2.79 cm)
Length: 6.3 in (16.0 cm)
Unit of Measure: Each (EA)