Enthalpy difference bypass control method and system for fresh air equipment

Abstract

The invention discloses an enthalpy difference bypass control method and system for fresh air equipment. The enthalpy difference bypass control method comprises the following steps that an outdoor enthalpy value is obtained according to the temperature and humidity of outdoor air; obtaining an indoor enthalpy value according to the temperature and humidity of the indoor air; acquiring a set enthalpy value according to the set temperature and the set humidity; and whether a bypass valve of the fresh air equipment is opened or not is judged based on the size relation among the outdoor enthalpy value, the indoor enthalpy value and the set enthalpy value. According to the enthalpy difference bypass control method, judgment of the temperature and the humidity is integrated, so that the indoor air adjusting effect can be guaranteed, and the situation that outdoor uncomfortable air is introduced into a room due to misjudgment is avoided; meanwhile, indoor temperature judgment is added, so that the comfort degree of indoor air can be actively adjusted to adapt to different use environments.

Description

technical field [0001] The invention relates to an enthalpy difference bypass control method for fresh air equipment, and also relates to a corresponding enthalpy difference bypass control system, which belongs to the technical field of air conditioning. Background technique [0002] The main function of the fresh air equipment is to send the fresh air from the outside into the room, and at the same time exhaust the dirty air from the room to the outside. When the outdoor air is relatively comfortable, such as in spring and autumn, the outdoor air can be sent directly to the room without heat recovery. The opening and closing of this mode is controlled by the bypass valve, so it is called bypass mode. [0003] The logic of the traditional fresh air equipment to control the opening and closing of the bypass is roughly: by detecting whether the temperature of the outdoor air is appropriate (compared with the temperature preset by the customer), if it is appropriate, the bypas...

AI Technical Summary

Problems solved by technology

However, the control logic cannot make comprehensive judgments based on the indoor air conditions, and there may be unreasonable opening or closing situations

For example: Although the outdoor air has not reached the expected state, the indoor air condition is even worse at this time, and the outdoor air is more comfortable. At this time, the bypass function should be turned on, but according to the traditional logic, the bypass function at this time will not Open

Images