CN1442637A - Tunnel wind air conditioning device of improving hoggery hot environment - Google Patents

Abstract

An air conditioner using the underground tunnel wind for pig house is based on the principle that the underground temp is constant, so appearing as cold in the summer or warm in the winter. It is composed of a U-shape underground tunnel, a volume-variable blower arranged at the outdoor air inlet of said tunnel, air delivering pipe connected with the indoor air outlet of said tunnel, and wind supplying openings made on said air delivering pipe.

Description

Tunnel air-conditioning device for improving thermal environment in pig house

technical field

The invention relates to a tunnel wind air conditioner, in particular to a tunnel wind air conditioner for improving the thermal environment of pig houses. It belongs to the field of building environment and equipment engineering and refrigeration and air conditioning technology.

Background technique

In recent years, with the continuous development of animal husbandry science and animal husbandry production, the issue of livestock environmental control has been paid more and more attention. In the process of pig house construction, improving feed conversion efficiency, saving feed energy, reducing livestock diseases, improving livestock production performance, and providing necessary conditions for factory pig farming are important topics that urgently need to be discussed and developed. Tunnel wind cooling is a new technology developed rapidly in the early 1970s in my country, but due to its poor air quality, it is rarely used in civil buildings. But the tunnel wind heat supply has not been reported both at home and abroad. Compared with the current use of more evaporative cooling (splashing water on the ground in summer) and no heating device in winter in pig house buildings, tunnel air-conditioning has attracted people's attention because of its simple system and low cost. But it has not been used in pig houses at present.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention utilizes natural or artificial tunnels to design a tunnel air-conditioning device to improve the thermal environment of pig houses. The original temperature of the formation can be divided into shallow and deep layers, generally 15m underground is used as the dividing line: the layer above 15m is called shallow layer, and the layer below 15m is called deep layer. Most of the tunnels used in tunnel air-conditioning projects are shallow underground structures. The underground temperature environment, which is warm in winter and cool in summer, provides good cold and heat source conditions for the application of tunnel wind cooling (heating) projects. The invention mainly includes: a variable air volume fan, a U-shaped tunnel, an air inlet, an air supply pipe, an air supply outlet and the like. Excavate a U-shaped tunnel at a certain distance from the pigsty outdoors. One of the two exits of the tunnel is outside the pigsty and the other is inside the pigsty. An air inlet and a variable air volume fan are installed at the exit of the tunnel outside the pigsty. Connect an air supply pipe to the top of the pig house at the exit of the tunnel in the pig house, and open several air supply outlets under the air supply pipe on the top of the pig house. In winter, the temperature in the tunnel is higher than that of the pig house, and the device sends warm air from the air outlet to improve the ambient temperature of the pig house to meet the growth needs of pigs.

If there are ready-made artificial tunnels or natural tunnels such as caves, tunnels, and underground rivers, they can be directly used. When there is no ready-made tunnel available, a simple tunnel needs to be built.

In order to reduce the amount of tunnel construction as much as possible, the design of the tunnel system should be optimized, and the required tunnel length should be reduced to a minimum by adopting reasonable tunnel section size, shape, wall treatment, and suitable wind speed in the tunnel.

According to the change of outdoor air temperature, the maximum cooling (heating) effect can be obtained by changing the air volume of the variable air volume fan. After obtaining the optimal ventilation volume, the piping system can be designed and the appropriate fan can be selected.

The combined use of the tunnel ventilation system in summer and winter can also increase its cooling and heating effects. When the system is used in winter, the stratum itself is gradually cooled by the air while heating the air. When the system ends its operation in winter, a certain amount of "cold" has accumulated in the formation, which will have an impact on the ground temperature before the system's summer operation, which can reduce the summer ground temperature to a certain extent and improve the cooling effect in summer. Similarly, when the system is used in summer, while the ground is cooling the air, it is also continuously accumulating heat, which will increase the ground temperature in winter to a certain extent and improve the winter heating effect.

The authentic air-conditioning device can meet the thermal environment temperature required for the growth of pigs, has a simple structure and saves energy. The operation only consumes a small amount of electric energy required by the fan, has no pollution to the environment, has a long service life of the tunnel, and is extremely simple in operation management and maintenance.

Description of drawings:

Fig. 1 is a schematic diagram of the tunnel air-conditioning device of the present invention. In the figure, 1-variable air volume fan, 2-air inlet, 3-tunnel, 4-air supply pipe, 5-air supply outlet.

Specific implementation method

The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the present invention mainly includes a variable air volume fan 1 , an air inlet 2 , a tunnel 3 , an air supply pipe 4 , and an air supply outlet 5 . Excavate a U-shaped tunnel 3 outside at a certain distance from the pigsty, one of the two exits of the tunnel is outside the pigsty, the other is inside the pigsty, and an air inlet 2 is installed at the exit of the tunnel 3 outside the pigsty and a variable air volume is installed Fan 1. Connect an air supply pipe 4 to the top of the pig house at the outlet of the tunnel 3 in the pig house, and open several air supply outlets 5 below the air supply pipe 4 on the top of the pig house. In summer, the temperature in the tunnel 3 is lower than the temperature of the pig house. The air supply port 5 sends cold air, and the temperature in the tunnel 3 is higher than the temperature of the pig house in winter, and the device sends warm air from the air supply port 5, so as to improve the ambient temperature of the pig house to adapt to the growth needs of pigs.

If there are ready-made artificial tunnels 3 or natural tunnels 3 such as caves, tunnels, underground rivers, they can be directly utilized. When there is no ready-made tunnel 3 available, a simple tunnel 3 needs to be built.

In order to reduce the construction amount of the tunnel 3 as much as possible, the design of the tunnel 3 system should be optimized, and the required tunnel 3 length should be reduced to minimum.

According to the change of outdoor air temperature, the maximum cooling (heating) effect can be obtained by changing the air volume of the variable air volume fan 1, and after the optimal ventilation rate is obtained, the piping system can be designed and the appropriate fan 1 can be selected.

The combined use of the tunnel 3 ventilation system in summer and winter can also increase its cooling and heating effects. When the system is used in winter, the stratum itself is gradually cooled by the air while heating the air. When the system ends its operation in winter, a certain amount of "cold" has accumulated in the formation, which will have an impact on the ground temperature before the system's summer operation, which can reduce the summer ground temperature to a certain extent and improve the cooling effect in summer. Similarly, when the system is used in summer, while the ground is cooling the air, it is also continuously accumulating heat, which will increase the ground temperature in winter to a certain extent and improve the winter heating effect.

Claims (1)

1. underground air conditioning device that improves the pig house thermal environment, mainly comprise variable air rate blower fan (1), air inlet (2), genuine (3), ajutage (4), air outlet (5), it is characterized in that outdoor apart from an excavation U-shaped tunnel (3), pig house a distance, genuine (3) two export one outside pig house, one in pig house, genuine exit outside pig house is established air inlet (2) and variable air rate blower fan (1) is installed, and genuine exit connects an ajutage (4) to the pig house top in pig house, opens several air outlets (5) in pig house top ajutage (4) below.

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