###### Abstract
This design and control method increase this type of PSHS's controllable performance and solar energy collecting, allowing the indoor air temperature to be further increased. [PERSON] et al. [9] proposed a novel type of solar house integrated with flat gravity-assisted heat pipes. Single-direction heat transfer in buildings effectively improves the solar energy absorption rate, wall heat storage rate and indoor temperature of the room. However, the above-mentioned scholars used clever design and control methods to improve the shortcomings of this type of PSHS, and the heat gain brought by the PSHS has been further improved. Due to problems with the layout, there are natural deficiencies in thermal resistance, heat storage and solar heat collection areas, and excessive optimization has diluted the cost-cutting benefits. The ASPSHS is a mixed deformation of Trombe walls and direct-gain room. The problem of insufficient heat collection during the day of the direct-gain room and insufficient air thermal resistance of the Trombe wall at night can be overcome by building a large-volume glass room on the south side of the room [10; 11]. During the daytime, the attached sunspace is employed as a heat collecting component to raise the internal air temperature by absorbing solar radiation heat, and storing part of the heat to the wall and transmission into the room. The effects of the attached sunspace on the indoor thermal environment can be classified into two modes: when the active interior window is opened, the natural air convection between the attached sunspace and room is delivering; when the active interior window is closed, the air in the attached sunspace forms an insulation to prevent heat transfer. Therefore, influence of the attached sunspace on the indoor thermal environment can be regulated by controlling the opening and closing status of the interior active window. In order to further improve the performance of the ASPSHS, scientists from various countries have conducted research on different aspects. [PERSON] et al. [12] carried out ASPSHS transformation on a farm house in Qinghai. The results of the experiments revealed that improving maintenance structure performance can reduce the amount of auxiliary heat source (coal burning), improve indoor thermal comfort and decrease indoor pollution; [PERSON] et al. [13] conducted experiments and simulation by placing an attached sunspace on the roof with various design parameters considered. The results demonstrate the benefit of using an attached sunspace to reduce heating energy consumption in farmhouses in China's cold regions; [PERSON] et al. [14] used EnergyPlus software to model the glass unit of the attached sunspace in a farmhouse in northeast China. The simulated results showed that an attached sunspace's double-glazed units with a 9 mm krypton layer in cold regions provides the greatest energy savings; [PERSON] et al. [15] and [PERSON] et al. [16] used PCM radiant floor and PCM louvers, respectively, to improve an attached sunspace's heat storage effect, demonstrating that combining the attached sunspace with reasonable phase change materials can significantly improve the heating and energy-savings effect of buildings. Current research focuses mostly on the optimizing and enhancing the thermal insulation and heat storage qualities of its envelopes [10; 11; 12; 13; 14; 15; 16]; there is little research on the indoor heating methods of attached sunspaces, which could not have an impact on this modifiable state nor is the dynamic indoor environment enhanced. In order to better take advantage of the two effects of ASPSHS on the indoor thermal environment, this paper proposes a new strategy, which can better adjust the opening and closing time of the interior active window. Attached sunspace and indoor natural ventilation heat exchange were modeled to simulate the strategy, and the dynamic distribution of the thermal environment was obtained by field measurement.