The working principle of the winter-heated vegetable greenhouse is as follows:

1. The winter-heated vegetable greenhouse is built with shading materials and transparent covering materials to form a closed space that can block outside airflow. and maintain indoor temperature.

2. The greenhouse is usually equipped with heating equipment, such as electric heaters or floor heating systems. These heating devices can generate heat by consuming electrical energy or burning fuel to provide a warm environment.

3. The greenhouse is also equipped with temperature and humidity sensors, automatic control systems and other equipment. These devices can monitor the indoor environment and automatically adjust the operation of heating equipment according to set temperature and humidity ranges to maintain suitable growing conditions.

The development history of vegetable greenhouses:

The first stage is the emergence of simple greenhouses. At the beginning of the 20th century, people began to build simple greenhouses using simple materials and structures, such as bamboo and film. These greenhouses are mainly used to protect crops from extreme weather conditions.

The second stage is the introduction of glass greenhouses. In the mid-20th century, the widespread use of glass greenhouses enabled the expansion of greenhouse vegetable cultivation. Glass materials have good transparency and thermal insulation properties, providing more stable environmental conditions.

The third stage is the popularization of technical equipment. From the end of the 20th century to the beginning of the 21st century, technical equipment such as automation control, temperature and humidity adjustment, and supporting equipment were widely used in vegetable greenhouses. These devices enable precise environmental control, improving production efficiency and crop quality.

The fourth stage is the emphasis on sustainable development. In recent years, as people pay more attention to environmental protection and sustainable development, the development of vegetable greenhouses has also paid more attention to energy conservation, emission reduction, resource recycling and other aspects. For example, technologies such as solar energy systems and rainwater collection and utilization are introduced to reduce energy consumption and environmental impact.

In the future, with the advancement of science and technology and the needs of agricultural production, vegetable greenhouses will continue to develop. It is expected that more innovative technologies will be applied to greenhouses, such as intelligent management systems, vertical planting, etc., to increase production, reduce resource consumption, and meet people's demand for green and healthy food.