Solution
Solutions for global temperature control systems
Medical Equipment
subcategory： Solution
2024-09-12
1. Application background
The temperature controller can be used in breathing machine, B- ultrasound machine, CT machine, minimally invasive surgery, medical constant temperature blanket, sterilizer, incubator, oxygen generator, medical pump, etc.
2. Protection principle
· The temperature switch is a mechanical passive component. When the circuit fails or the current exceeds the rated value, the abnormal heating of the circuit causes the temperature to rise. The temperature switch senses the external temperature change through the internal heat sensitive element bimetal. Once the temperature exceeds the set threshold, the two pieces will deform and disconnect. Contact, cut off the circuit, thereby playing a protective role.
When the heat-sensitive element acts, the contact is disconnected, and the contact resistance changes instantly from less than 50mΩ to close to infinity, turning off the main circuit current, thereby playing a protective role.
When the ambient temperature drops to the reset temperature of the temperature switch, the heat sensitive element returns to the initial state, the contact is closed again, and the resistance signal within 50mΩ is given to the circuit, and the actuator operates according to the program setting.
3. Installation position
The temperature switch is often placed in the main line or a position where the heating temperature can be felt quickly and well, so as to monitor the temperature change in time.
4. Selection factors
· Rated current and voltage: Ensure that the rated current and voltage of the selected temperature switch meet the operating current and voltage requirements of the equipment to ensure normal operation.
· Protection temperature: according to the design and installation location to choose different temperatures.
· Contact switch form: it is divided into two types: normally closed and normally open. Normally closed is the initial state of contact closure, and the temperature protection contact is disconnected. It is always the opposite. Different switch forms are selected according to the design.
· Reset form: divided into two types: automatic reset and manual reset. After the contact is disconnected, after the temperature drops to the reset temperature of the temperature switch, the contact is automatically closed, which is automatic reset; if the contact needs to be manually closed, it is manual reset.
· Size and installation method: Select the appropriate size and installation method of the thermal protector according to the size and installation space of the equipment to ensure that the installation is convenient and does not affect the normal operation of the equipment.
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