Thermal resistor type heater

Abstract

The invention relates to a thermal resistor type heater. The heater comprises a heat conductive housing, a thermal resistor, a heat dissipation body, a heat conductive compensating arm and a temperature sensor. The heat conductive housing is used for being in contact with tumor tissue and conducting heat to the tumor tissue; the thermal resistor is located in the heat conductive housing and heatsitself through current, and the conversion of electric energy to thermal energy is in line with a joule's law; the heat dissipation body is located in the heat conductive housing and dissipates and uniformly conducts heat generated by the thermal resistor to the heat conductive housing; the heat conductive compensating arm is connected to the heat dissipation body, and the temperature of a specific position on the heat conductive compensating arm is the same as the temperature of the heat conductive housing or an error between the temperature of the specific position on the heat conductive compensating arm and the temperature of the heat conductive housing is within a required range; the temperature sensor collects a value of the temperature of the specific position on the heat conductivecompensating arm to reflect an average value of the temperature of the surface of the heat conductive housing. According to the thermal resistor type heater, by adjusting the mounting and fixing position of the temperature sensor on the heat conductive compensation arm, the temperature sensed by the temperature sensor is the same as the surface temperature of a heating area of the housing or an error between the temperature sensed by the temperature sensor and the surface temperature of the heating area of the housing is within the required range, and therefore the purpose of accurately controlling the surface temperature of the heater by a controller is achieved.

Description

technical field [0001] The invention relates to a thermal resistance heater, in particular to a thermal resistance heater for tumor treatment. Background technique [0002] The tumor hyperthermia equipment currently used clinically is both radio frequency tumor hyperthermia equipment and microwave tumor hyperthermia equipment, both of which use electromagnetic waves to heat tumor tissue. The basic principle is that human tissue absorbs electromagnetic waves and heats up. The conversion of electromagnetic waves into heat by human tissue is not only related to electromagnetic intensity, but also has a lot to do with the structure and dielectric constant of human tissue itself. Due to the coexistence of multiple structures in tumor tissue, when radio frequency or microwave is used for tumor hyperthermia, the temperature of the entire tumor tissue will be uneven, and the internal temperature of the tumor will vary greatly. If the inactivation temperature is not reached, the tum...

AI Technical Summary

Problems solved by technology

However, the location of the temperature sensor will affect the accuracy of temperature measurement

If the temperature sensor is directly arranged on the surface of the heater and directly contacts the tumor tissue, there will be the following problems: 1. There is a point contact between the temperature sensor and the surface of the heater, and the measured value of the temperature sensor is only the temperature value of a certain point of the heater instead of The average temperature value of the entire heater; 2. When the temperature measurement point of the temperature sensor is just located in a bad heat dissipation area, the heat here cannot be transferred quickly, causing the temperature at this place to be higher than other areas with good heat dissipation, so that the overall (average) of the heater The temperature is lower than the required treatment temperature value, affecting the treatment effect

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