Defrost Assembly Control Bimetal Thermostat Thermal Protector Refrigerator Parts
Product Parameter
| Product Name | Defrost Assembly Control Bimetal Thermostat Thermal Protector Refrigerator Parts |
| Use | Temperature control/Overheat protection |
| Reset type | Automatic |
| Base material | resist heat resin base |
| Electrical Ratings | 15A / 125VAC, 7.5A / 250VAC |
| Operating Temperature | -20°C~150°C |
| Tolerance | +/-5 C for open action(Optional +/-3 C or less) |
| Protection class | IP00 |
| Contact material | Silver |
| Dielectric Strength | AC 1500V for 1 minute or AC 1800V for 1 second |
| Insulation Resistance | More than 100MW at DC 500V by Mega Ohm tester |
| Resistance Between Terminals | Less than 100mW |
| Diameter of bimetal disc | 12.8mm(1/2″) |
| Approvals | UL/ TUV/ VDE/ CQC |
| Terminal type | Customized |
| Cover/Bracket | Customized |
Applications
Refrigerators, Show Case (cold storage, freezing, thermal insulation), Ice Maker, etc
Features
• Low profile
• Narrow differential
• Dual contacts for extra reliability
• Automatic reset
• Electrically insulated case
• Various terminal and lead wires options
• Standard +/5°C tolerance or optional +/-3°C
• Temperature range -20°C to 150°C
• Very economical applications
How do Defrost Thermostats Work?
Defrost thermostats work as part of a process control loop in which the defrost thermostat measures a variable and is set to activate the heating element once the variable reaches a certain point.
There are several potential variables for a defrost thermostat to measure and activate according to:
Time – the defrost thermostat activates at specific time intervals, regardless of the level of frost
Temperature – the defrost thermostat measure the temperature of the evaporator, activating once it reaches a set point to warm and defrost the evaporator
Frost thickness – an infrared sensor is used to measure how much frost built up and activate the heating element once it reaches a certain thickness.
Once the measured variable reaches the specified point, whether it be a time period, temperature or frost thickness, the defrost thermostat shuts down the compressor and, if one is installed, activates the heating element.
The defrost thermostat will have a second setpoint at which to cut off in a similar way to the activation setpoint. This ensures the heating element isn’t running any longer than necessary to bring the refrigerator or freezer back to peak efficiency.
Our product has passed the CQC,UL,TUV certification and so on, has applied for patents accumulatively more than 32 projects and has obtained scientific research departments above the provincial and ministerial level more than 10 projects. Our company has also passed the ISO9001 and ISO14001 system certificated, and national intellectual property system certificated.
Our research and development and production capacity of the company’s mechanical and electronic temperature controllers have ranked in the forefront of the same industry in the country.
