Automatic control switch for electric heating blanket temperature with light-change indication

• Main Authors: LONG HE, SHENGRONG HE
• Format: Patent
• Language: English
• Published: 21.02.2001
• Edition: 7
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

The utility model discloses a temperature automatic control switch with variable light indication for electric heating blankets, which comprises a temperature adjusting circuit and an indicating circuit, wherein, the temperature adjusting circuit is connected in series into one power supply conducting wire. The utility model is characterized in that the indicating circuit is composed of luminous diodes which are mutually connected in parallel and are connected in series into the other power supply conducting wire and the matching electric resistances thereof; the resistance values of the matching electric resistances are equal to 1 percent of the resistance value of an electric heating wire of an electric heating blanket. Compared with the prior art, the utility model has the advantages of simple structure, low cost, good indicating effect, etc.