Temperature control method of electric blanket

A temperature control method and electric blanket technology, which are applied to electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of reliability discount, difficulty in process realization, and high production cost

Active Publication Date: 2019-01-08
滁州国康医疗仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a one-time thermal fuse can only collect the temperature of one point and cannot reflect the temperature of the entire mat, so the reliability is greatly reduced. If many disposable thermal fuses are installed in the mat, the reliability will of course be improved, but the production cost The height and the internal wiring become complicated, and it is difficult to realize in the process
Electric blankets or blankets are bound to cause fires when NTC temperature sensors and / or one-time thermal fuses fail or are not set

Method used

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  • Temperature control method of electric blanket
  • Temperature control method of electric blanket

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Experimental program
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Effect test

Embodiment 1

[0022] For the control device used in the temperature control method of the electric blanket in this embodiment, see figure 1 As shown, it includes the power supply for the heating wire (or wire) in the electric blanket. The power supply is connected to the control device by the mains 220V and then transformed and rectified to form a power supply output. A second temperature control processor is provided, but the first temperature sensor, the first temperature control processor and the thermal fuse which are commonly used for measuring and controlling the real-time temperature of the electric blanket are not included. A first electronic switch BTA08-1 and a second electronic switch BTA08-2 are arranged between the power supply and the heating wire, and an AND gate is formed between the first electronic switch BTA08-1 and the second electronic switch BTA08-2 (connected in series between the power supply and the heating between wires). The input ends of the first electronic swi...

Embodiment 2

[0033]The temperature control method of the electric blanket in this embodiment is an improvement on the basis of Embodiment 1, except that it is the same as Embodiment 1. The difference is:

[0034] 1) if figure 2 As shown, the second temperature sensor ResThermal-2 for measuring the real-time temperature of the environment is added, and the limit value of the ambient temperature is set in the second temperature control processor MCU2, and the real-time temperature of the environment is measured at the same time. When the real-time temperature of the environment is greater than or equal to the limit value of the ambient temperature , control the electric heating pad to stop powering on, the ambient temperature limit of this embodiment is selected to be 35°C, the ambient temperature limit is selected according to human experience, and is not limited to 35°C;

[0035] 2) if figure 2 As shown, a negative potential generating unit is added. The mains 220V is output to the neg...

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Abstract

The invention relates to a temperature control method of an electric blanket, belonging to the technical field of electric heating control. The method omits the constant temperature closed loop control and the temperature safety power off control of the electric blanket, and directly controls the electric blanket to be pulsed with a pulse signal less than 100% duty cycle. The constant temperatureclosed loop control is to control the heating of the electric blanket after power supply by comparing the real-time temperature of the electric blanket with the preset constant temperature value. Thetemperature fuse control is to cut off the electric blanket to power through the fuse of the temperature. The method completely gets rid of the so-called double-safety control mechanism of the constant temperature control and the temperature safety power-off protection of the existing electric heating pad, and guarantees the safety of the electric heating pad.

Description

technical field [0001] The invention relates to a temperature control method of an electric heating blanket (or pad), and belongs to the technical field of electric heating control. Background technique [0002] Pads or blankets for electric heating or physiotherapy are widely used in people's daily life. This kind of electric heating sleeping pad is generally a constant temperature control type, and the control constant temperature value is set between 25°C and 50°C. In this temperature range, the temperature sensor installed in the pad or blanket is used to sample the heating temperature in real time, and the sampled value is compared with the set temperature value to realize automatic temperature adjustment, so as to achieve the purpose of constant temperature. This temperature control is the mode commonly used at present, and a point sampling NTC temperature sensor and a disposable temperature-limiting temperature fuse are generally installed in the pad or blanket. The...

Claims

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Application Information

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IPC IPC(8): H05B3/34H05B1/02
CPCH05B1/0272H05B3/342
Inventor 张慧兵
Owner 滁州国康医疗仪器有限公司
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