CN206504435U - A non-powered ventilation device - Google Patents

Abstract

The utility model discloses a non-powered ventilation device, which comprises a non-powered ventilator and a leaf fan. The non-powered ventilator has a central axis; The shaft is fixedly connected so as to realize linkage with the unpowered ventilator. The utility model is not only low in cost, easy to install, but only needs natural wind and temperature difference between indoor and outdoor for operation and operation, without consuming electric energy and other energy sources; moreover, the ventilation volume can be increased by 30% compared with the traditional non-powered ventilator, and can be used for large-scale ventilation and fire Early smoke exhaust.

Description

A non-powered ventilation device

technical field

The utility model relates to a ventilation device, in particular to a non-powered ventilation device.

Background technique

The unpowered ventilator, also known as the natural ventilator, uses the natural customs of nature to drive the turbine of the fan to rotate, and uses the principle of indoor and outdoor air convection to accelerate and transform any parallel air flow into vertical air from bottom to top. Flow, thereby using centrifugal force and negative pressure effect to remove indoor air. The natural ventilator has the advantages of low cost, easy installation, low construction and maintenance costs, convenient work and no consumption of resources. It has been very popular in Western European and American countries for decades. In China, with the advent of a large number of steel structure buildings, the installation and use of non-powered ventilators is also increasing. It does not use electricity and has no noise. Long-term operation, remove indoor heat, humidity and odor. Generally, unpowered ventilators use arc-shaped blades to form spherical impellers. Due to authoritative research in this field in the United States, such as the conclusion of 32 blades with the best aerodynamic design, the spherical design has become the default standardization. Future research And the most change is that the upper and lower connection points of the blade are not in the same vertical line, forming a wave shape, so that the impeller can rotate at a lower wind force. However, the currently used natural ventilators still have low operating efficiency, and most of them are only used in small and medium-sized ventilation places. When a fire occurs, the smoke exhaust volume is too small to achieve rapid smoke exhaust, and cannot be used for smoke exhaust and ventilation in fire conditions. Ventilation of large premises.

Utility model content

The purpose of the utility model is to provide a non-powered ventilation device with high operating efficiency, which can be used for large-scale ventilation and smoke exhaust in the early stage of fire.

In order to solve the above-mentioned technical problems, the non-powered ventilation device provided by the utility model includes a non-powered ventilator and a leaf fan, and the described non-powered ventilator has a central axis; In the mouth, and fixedly connected with the central shaft, so as to realize linkage with the unpowered ventilator.

The utility model is not only low in cost, easy to install, but only needs natural wind and temperature difference between indoor and outdoor for operation and operation, without consuming electric energy and other energy sources; moreover, the ventilation volume can be increased by 30% compared with the traditional non-powered ventilator, and can be used for large-scale ventilation and fire Early smoke exhaust.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a sectional view of the utility model.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-2, the non-powered ventilation device provided by the utility model includes a non-powered ventilator 1 and a leaf fan 2, and the non-powered ventilator 1 has a central axis 11, and the central axis 11 is fixed In the internal support of the passive ventilator 1; the blade fan 2 is arranged in the air inlet 12 of the passive ventilator, and is fixedly connected with the central shaft 11, and the size of the fan blade is in step with that of the ventilator. The air port 12 is adapted to ensure that the blades of the fan blades 2 cannot scrape the wall of the non-powered ventilator. The fixing method of the central axis 11 and the blade fan 2 is threaded and fixed with bolts, so as to realize the The unpowered ventilator 1 is linked.

As shown in Figure 1, according to the experiment on the number of fan blades, it can be concluded that the number of blades increases from 3 to 6, and the total pressure and dynamic pressure of the fan increase significantly. When the number of blades increases to 9, the dynamic pressure increases very little, and increases to 12. The total pressure and the dynamic pressure are both reduced, and the more the number of blades, the greater the flow rate and the more powerful, but the greater the self-weight and friction force, the greater the low-speed driving force is required, so a larger fan shaft is required. Power, considering the above points, and the power of the device comes from the self-power of the unpowered ventilator, which cannot provide a large fan shaft power, so it is most reasonable to choose six blades for the blade fan 2.

Compared with the existing non-powered ventilator, this device adds a leaf fan to the air inlet of the non-powered ventilator, and through the linkage effect of the leaf fan and the non-powered ventilator, the air inlet area of the non-powered ventilator is formed to be more efficient. Large negative pressure, thereby increasing the ventilation volume, not only can be used for large-scale ventilation, but also can be used for smoke exhaust in the early stage of fire.

Claims (1)

1. a kind of powerless ventilation device, it is characterised in that：It is described unpowered logical including Unpowered ventilation device (1) and leaf fan (2) Wind device (1) has a central shaft (11)；Leaf fan (2) is arranged in the Unpowered ventilation device air inlet (12), and with institute State central shaft (11) to be fixedly connected, linked so as to realize with the Unpowered ventilation device (1), the leaf fan (2) has six fans Leaf.