RU152395U1 - INCUBATOR FAN - Google Patents

Abstract

An incubator fan, including a prefabricated propeller located inside the incubator and mounted on a fan support shaft connected to an electric motor shaft, characterized in that the electric motor is located on a rack outside the incubator, and the electric motor is connected to a ventilation mode control unit that provides for changing the air velocity in the incubator in different periods of incubation of eggs.

Description

The utility model relates to the field of agriculture, in particular to devices for the incubation of eggs of poultry.

As is known, the results of egg incubation, namely the hatchability of eggs, is directly related to the conditions for maintaining the necessary parameters of temperature, humidity and air velocity in the incubator at different incubation times.

A change in the air velocity in the incubator does not cause any specific changes in the development of the embryos. But the speed of air movement enhances or weakens the effect of other external factors - humidity and temperature.

In different periods, the embryo needs different conditions for development. This follows from the age, physiological and morphological features of its development. Therefore, the incubation regime cannot be constant, it must change according to the particular development of the embryo at its individual stages (that is, differentiate by incubation periods).

The most favorable combination of external conditions in the first days of incubation is increased temperature and high humidity and unfavorable - low temperature and low humidity, especially at high speeds of air movement.

In the last days of incubation, lowered temperature and high humidity with a high air velocity are favorable, and high temperature, low humidity and low air velocity are unfavorable.

When regulating the incubation regime, it is necessary to use all the factors of the complex effect on the egg. Such an effect should be aimed at regulating the heating of eggs, their evaporation of water, and at promoting the respiration of the embryo. Incubator air temperature is the main factor regulating egg heating. But the value of the same temperature level will be different for different levels of other factors, primarily humidity and air velocity. The criterion for the correct heating of eggs can only be satisfactory development of the embryo.

The evaporation of water is also affected by the speed of air movement. At a low air velocity, the eggs lose little in weight. With increasing air velocity, the evaporation of water increases greatly, and the eggs quickly lose weight. The loss in weight of eggs also depends on the properties of the shell, protein, and metabolic rate during embryo development.

The heat generated by the eggs raises the temperature of the surrounding air. Along with an increase in temperature around the eggs, relative humidity decreases slightly. Thus, a “micro mode” is created near the eggs. The speed of air movement affects the development of the chicken embryo in the first days of incubation. (M.V. Orlov, Yu.N. Vladimirova, L. A. Brazhnikova, “Research into the micro regime in incubators Record-39” and “Record-42.” Proceedings of VNITIP 1963, vol. 28).

ON. Konoplev during the experiments received the following - an increase in temperature at high humidity accelerates the development of the embryo the stronger, the greater the speed of air movement. An increase in the speed of air movement at low temperature and humidity delays, and at high temperature accelerates development; an increase in air velocity at high humidity accelerates development both at low and high temperatures. In the same way, the dimensions of the vascular field and the embryo change (Konoplev N. A. “The influence of various complexes of external factors (temperature, humidity and air velocity) on the growth and development of the chicken embryo.” Abstract, Diss. Moscow, 1955).

In the experiments of M.F. Magpies, in the second half of the incubation of duck eggs, the air velocity was changed from 0.5-0.6 m / s to 1.0-1.2 and 1.8-2.0 m / s at an air temperature in the incubator 37, 5 ° and humidity 50-58%. Under these conditions, an increase in the air velocity led to an improvement in the development of embryos and a decrease in mortality. As a result, the ducklings hatching increased from 79.0 to 85.5% (Soroka MF “Development of a regimen and technique for incubating duck eggs without cooling in cupboard incubators.” Proceedings of the NIIP 1954, vol. 24. (Author. Diss. Zagorsk )

By increasing or decreasing the speed of air movement inside the incubator at different periods of incubation, it is possible to achieve an increase in output by 2-6%

The speed of air movement in the incubator is set by the fan.

In incubation practice, various fan designs are known which are used in incubators to create different air speeds.

In the design of the IUP / IUV incubators (Russia), a pulley system and a belt drive were used; in the incubators of the VH Emka series (Belgium), a gear motor was used.

The disadvantage of designs is their complexity and the creation of a strictly defined speed of air movement.

The prototype of the claimed utility model “Incubator Fan” was the incubator fan VH-96-S Emka (Belgium). The fan consists of a strut on which a gear motor with a propeller is mounted. The design is located inside the incubator.

The disadvantage of the design of the VH-96-S Emka incubator fan is that the air velocity is set by the parameters of the gearbox used and that the design is completely located inside the incubator.

The objective of the proposed utility model is to create an incubator fan design that provides a change in the air velocity in the incubator at different egg incubation times.

The task is achieved by the design of the incubator fan, including a prefabricated propeller located inside the incubator and mounted on the fan support shaft connected to the motor shaft, characterized in that the electric motor is located on a rack outside the incubator, and the electric motor is connected to the control unit for ventilation modes, which allows changing over a wide range of revolutions of the electric motor and, thereby, change the speed of air movement inside the incubator according to a given program.

When the motor is turned on, rotation through the shaft of the fan support is transmitted to the propeller. The ventilation mode control unit, depending on the controlled parameters, sets the necessary air speed in the incubator.

The design of the fan (Fig. 1) consists of: a prefabricated propeller - a cross (pos. 4) and blades (pos. 3) attached to it; fan mounts (key 6) connected to an electric motor (key 2). The electric motor is mounted on a stand (pos. 5). The ventilation mode control unit (pos. 1) connected to the engine mounted on the back wall of the incubator (pos. 7).

The incubator fan operates as follows.

At the command of the ventilation mode control unit, the electric motor starts to rotate at a given speed. The propeller blades create a certain air velocity in the incubator chamber. Depending on the parameters controlled in the incubator, at the command of the ventilation mode control unit, the electric motor changes the rotation speed. The incubator sets the required air speed. Further, in the incubator, the air speed is controlled and recorded by the control unit.

Claims (1)

An incubator fan, including a prefabricated propeller located inside the incubator and mounted on a fan support shaft connected to an electric motor shaft, characterized in that the electric motor is located on a rack outside the incubator, and the electric motor is connected to a ventilation mode control unit that provides for changing the air velocity in the incubator in different periods of incubation of eggs.

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