System and method for controlling output power of electric heater

Abstract

The invention discloses a system and a method for controlling an output power of an electric heater. The system mainly comprises a collection unit, a duty ratio control unit and a thyristor control unit, which are electrically connected with one another in sequence. The method comprises the steps as follows: the collection unit collects an AC power cycle, an AC power voltage and an indoor temperature; the duty ratio control unit receives collected AC power cycle, AC power voltage and indoor temperature, obtains a first duty ratio value according to the AC power cycle, the AC power voltage and the indoor temperature, and obtains the duty ratio value of a thyristor control signal according to the first duty ratio value, the AC power voltage and the indoor temperature; and the thyristor control unit is used for receiving the duty ratio value of the thyristor control signal, and controlling opening and closing of a thyristor according to the duty ratio value of the thyristor control signal, so that the output power of the electric heater is controlled. The requirements of a user on indoor temperature stability and comfort are met by properly adjusting and reducing the output power of the electric heater.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a system and method for controlling the output power of an electric heater. Background technique [0002] At present, in electrical products such as heating and cooling air conditioners and electric heaters, there are different forms of electric heating as the main or auxiliary heating appliances. Heating can be achieved by heat pump air conditioners, electric heaters directly, or both. Among them, electric heating is generally based on whether it is turned on or not. Taking the work of an air-conditioning heat pump as an example, for example, a 1000W electric heater has two states of on or off, and the electric heater is protected by a mechanical thermostat and a fuse. The air outlet structure of the indoor unit of the air conditioner is usually made of plastic parts. Since the heat pump of the air conditioner itself has a large heating capacit...

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Problems solved by technology

[0005] The present invention overcomes the condition in the prior art that due to temperature superposition, it is easy to achieve the protection and exit conditions of the electric heater, so that the electric heater is turned off, and the electric heater exits the heating process, and there will be a significant drop in the outlet air temperature and heating capacity, which is beneficial to Insufficient of large fluctuations in indoor temperature, provide a way to control the output power of the electric heater in places where the temperature is high, and to control the output power of the electric heater in places where the temperature is low. system

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