Electric heating bag capable of intelligently realizing explosion-proof control by using singlechip

Abstract

The invention relates to an electric heating bag capable of intelligently realizing explosion-proof control by using a singlechip, which comprises a bag body and an electric heating body thereof, wherein the bag body is provided with a singlechip intelligent explosion-proof control device which comprises a singlechip, a voltage reducing and current limiting circuit, an electric heater control switch and a pressure sensing device; the singlechip is at least provided with a power connecting end, a pressure signal detection end and a heater control output end; the voltage reducing and current limiting circuit is connected with the power connecting end of the singlechip to supply required power to the singlechip; the pressure signal detection end of the singlechip is connected with the pressure sensing device; the electric heater control switch is connected in series between the heater control output end of the singlechip and the electric heating body; and the pressure sensing device is arranged on the bag body or a plug which can be touch-controlled when water pressure or air pressure in a bag cavity is higher than a preset value. The electric heating bag is intelligently controlled and protected by the singlechip when the water pressure or air pressure in the bag cavity is too high, is secure to use, does not need liquid injection when leaving a factory so as to save a water injection process and reduce packing and transportation cost, achieves intellectualized precision control and has the function of function expansion.

Description

technical field [0001] The invention relates to the technical field of electric heating bags, in particular to an electric heating bag controlled by intelligent explosion-proof control of a single-chip microcomputer. Background technique [0002] The structure of the existing electric heating heating bag generally includes a bag body and its electric heating body. The bag body is provided with a bag cavity, and liquid is stored in the bag cavity, and the electric heating body is immersed in the liquid; when heating, the electric heating body And make liquid heat, for people's heating use. The electric heating bag with the above structure has the following deficiencies: (1) Since the bag body is not provided with a device for prompting or protecting when the bag cavity is overfilled with water, that is, a device for prompting and protecting the water pressure in the bag cavity is too large Therefore, when the product leaves the factory, the manufacturer generally injects an ...

AI Technical Summary

Problems solved by technology

The electric heating bag with the above structure has the following deficiencies: (1) Since the bag body is not provided with a device for prompting or protecting when the bag cavity is overfilled with water, that is, a device for prompting and protecting the water pressure in the bag cavity is too large Therefore, when the product leaves the factory, the manufacturer generally injects an appropriate amount of liquid into the bag cavity so that people can use it directly; therefore, the traditional structure of the electric heating bag not only increases the water injection process, but also affects the processing efficiency. Moreover, it brings great inconvenience to the packaging and transportation of the electric heating bag, and increases the cost of packaging and transportation; moreover, after the electric heating bag has been used for a period of time, the user needs to replenish the liquid in the bag cavity. If there is no water pressure protection device installed on the machine, if the user adds too much or too little liquid, it will affect the heating effect of the electric heating bag, and even cause damage to the electric heating bag due to overpressure.

(2) Existing electric heating bags, in order to prevent the air pressure in the inner cavity of the bag from being too large when heating, generally an explosion-proof device is installed on the bag body, such as a contact switch; when working, the contact switch is touched by the thermal expansion of the bag body, The contact switch cuts off the heating circuit. Since the contact switch is connected in series to the heating circuit, and the heating circuit is directly connected to the external AC power supply, the contact switch connected to the AC power will easily generate arcing if it is closed or disconnected for a long time. Phenomena, there are certain safety hazards; moreover, the heating circuit of the electric heating bag is only controlled by the mechanical pull-in or disconnection action at the beginning of the contact, which lacks intelligent control

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