Ventilation and heat recovery system for livestock house

Abstract

The invention relates to the technical field of livestock house ventilation, in particular to a livestock house ventilation and heat recovery system which comprises a control device, a spring and autumn device, a summer device and a heat recovery system, the control device controls switches of all electric appliances of the system, and the spring and autumn device and the summer device are connected with the heat recovery system. The heat recovery system is installed in the livestock house, the control device is matched with the spring and autumn device, the summer device and the heat recovery system to adapt to the influence of environment changes in extremely cold areas and areas with clear four seasons on ventilation of the livestock house, the ventilation mode is changed according to different seasonal characteristics, and carbon emission of equipment is reduced. The energy consumption of the livestock house can be reduced to the maximum extent through mutual switching of the working modes of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation for livestock houses, and in particular to a ventilation and heat recovery system for livestock houses. Background Art

[0002] With the development and progress of society, energy conservation and emission reduction have been radiated to the actual production of poultry and livestock houses. Under this circumstance, the ventilation energy consumption and winter heating costs of poultry and livestock houses remain high, which has become a pain point for breeding groups and individuals. At present, the ventilation and heat recovery solutions of poultry and livestock houses are still mostly at the low-efficiency stage of longitudinal ventilation and preheating mode for heat exchange. The shell-and-tube heat exchange solution cannot be widely popularized due to the large size of the heat exchange box and the thick insulation layer of the box. The shell-and-tube heat recovery box can only be arranged outside the house due to its large size. In extremely cold areas, the heat exchange The core will frost, resulting in a decrease in heat recovery efficiency or even blockage, causing poultry and livestock to die from lack of oxygen and cause greater losses. Therefore, carbon emission reduction in poultry and livestock houses in winter cannot be successfully implemented on a large scale, which is not in line with the national call for carbon emission reduction; intelligent environmental controller, also known as intelligent environmental controller, is a high-tech device that integrates multiple environmental parameter monitoring and control functions; it can monitor and control the environmental parameters in a specific space in real time, such as temperature, humidity, air quality, noise, etc., to create a more comfortable, safe and energy-saving living and working environment; intelligent environmental controller is a programmable controller based on PLC or single-board computer.

[0003] CN202110256284.0 discloses a ventilation system for poultry and livestock breeding houses, including a geothermal exchange air duct, an underground horizontal air duct, a vertical air duct, a positive pressure air filtration system, a first air duct, a second air duct, a one-way air inlet window and a one-way air outlet window. It can use geothermal energy to keep the temperature in the poultry and livestock breeding house within a certain range to meet breeding needs.

[0004] However, in actual use, the above-mentioned device does not have the ability to adapt to the changes of the four seasons, especially the ventilation changes of the four seasons in areas with large temperature differences. It does not have the ability to autonomously convert the ventilation mode according to the characteristics of different seasons, and has a large carbon emission. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a poultry and livestock house ventilation and heat recovery system. By using a control device in conjunction with a spring and autumn device, a summer device and a heat recovery system, it can adapt to the impact of environmental changes in extremely cold areas and areas with distinct four seasons on the ventilation of poultry and livestock houses, and change the ventilation mode according to different seasonal characteristics to reduce the carbon emissions of the equipment; by switching the working modes of the equipment, the energy consumption of the poultry and livestock houses can be minimized, contributing to the country's carbon emission reduction.

[0006] To achieve the above-mentioned objectives, the present invention provides a poultry and livestock house ventilation and heat recovery system; it includes a control device, a spring and autumn device, a summer device and a heat recovery system, the control device controls the switches of all electrical appliances in the system, the spring and autumn device, the summer device and the heat recovery system are interconnected, and the heat recovery system is installed inside the poultry and livestock house.

[0007] Preferably, the control device includes an intelligent environmental controller, multiple groups of air pressure sensors, multiple groups of temperature sensors, multiple groups of carbon dioxide sensors and multiple groups of ammonia sensors. The signal output ends of all sensors are connected to the intelligent environmental controller, and the intelligent environmental controller controls the switches of all electrical appliances of the equipment; the intelligent environmental controller is used in conjunction with multiple sensors to monitor the environment inside and outside the house, and switch the activation of the spring and autumn device, summer device and heat recovery system according to changes in environmental information, so as to adapt to the impact of environmental changes in extremely cold areas and areas with distinct four seasons on the ventilation of poultry and livestock houses, and reduce the carbon emissions of the equipment.

[0008] Preferably, the spring and autumn device includes a livestock house, an air filter box, an air filter, an air inlet variable-speed fan and an air duct. The air inlet variable-speed fan is installed on the air inlet of the livestock house, and the input end of the air inlet variable-speed fan is connected to the air filter box. The air filter is connected to the inside of the air filter box. The air inlet of the livestock house is connected to multiple groups of air ducts. The distribution of the multiple groups of air ducts is arranged according to the spatial structure inside the livestock house. Holes are opened in different parts of the air ducts according to usage requirements, and exhaust outlets are set on the roof or side walls of the livestock house; under suitable environmental conditions and without plague viruses, the air inlet variable-speed fan is turned on to send outside air into the multiple groups of air ducts it is connected to, and the holes on the air ducts accurately send outside air to the required area, and the outside air is filtered through the air filter box and the air filter to reduce Less viruses in the outside air enter the house, cooperate with the control device to monitor the air pressure inside and outside the livestock house, and control the speed of the air inlet variable speed fan according to the air pressure information, so that the pressure range in the livestock house is between -500 Pa and +500 Pa. According to the breeding type and age of the breeding type, combined with the temperature, pressure, humidity, carbon dioxide concentration, ammonia concentration and other information in the livestock house, the variable speed fan is controlled to perform low-power precise air supply to meet the required ventilation volume. The old house can be renovated at a lower cost to isolate the virus from entering the livestock house through the air. The efficient operation of the air inlet variable speed fan 7 can save users a lot of electricity costs. The high-pressure and high-efficiency characteristics of the air inlet variable speed fan can also reduce the frequency of air filter replacement for users, thereby providing energy-saving and emission-reduction transformation plans and operation plans, and reducing operating energy consumption.

[0009] Preferably, the summer device includes a wet curtain and an exhaust fan. A plurality of exhaust fans are installed horizontally or vertically on the outer surface of the livestock house. The output end of the exhaust fan is connected to the inside of the livestock house, and a wet curtain is installed on the output end of the exhaust fan. The external environmental conditions in the livestock house are monitored by the control device. When the temperature is high in summer and the virus activity is low, the control device controls the wet curtain and the exhaust fan to open during the high temperature period, and closes the spring and autumn device at the same time, so that the system switches to summer mode. The exhaust fan sends the outside air into the livestock house at a high speed and cooperates with the wet curtain to evaporate, thereby cooling the surface of the livestock. Temperature, and can reduce the temperature to a range suitable for poultry and livestock. The appropriate temperature can not only improve the growth efficiency of poultry and livestock, but also reduce the death caused by excessive temperature or the reduction of feeding caused by the reduction of breeding results; this ventilation mode can be used for biological protection without air filters. This ventilation mode not only does not require air filters, but also the pressure on the fan end is reduced due to the lack of filters. At this time, the load on the fan end is reduced and the energy consumption is reduced. The consumables of the air filter are zero. This ventilation mode can greatly reduce the operating power of the exhaust fan, reduce the frequency of air filter replacement, and thus reduce carbon emissions.

[0010] Preferably, the heat recovery system includes an exhaust variable-speed fan, an outer frame, a heat exchange core and an exhaust air filter. The outer frame is installed inside the poultry and livestock house through a rack, the exhaust variable-speed fan and multiple groups of exhaust air filters are installed on the outer frame, the output end of the exhaust variable-speed fan is connected to the outside of the poultry and livestock house, the heat exchange core is installed inside the casing formed by the outer frame, the output end of the air inlet variable-speed fan is connected to the outer frame through a group of air ducts, the input ends of all air ducts are provided with electric valves, and the output end of the exhaust variable-speed fan is connected to multiple groups of air ducts with openings; when the lowest temperature in winter is above minus fifteen degrees Celsius, the four heat exchange core modules are installed in the house in the form of assembly or splicing, and the air filter and the air inlet variable-speed fan are used and the output end of the air inlet variable-speed fan is closed to enter the air duct inside the poultry and livestock house. The electric valve on the outer frame prevents outside air from directly entering the poultry and livestock house through the air duct with openings. The electric valve on the air duct connected to the outer frame is opened. At this time, the outside cold air passes through the air filter and the air inlet variable speed fan into the outer frame and enters the air intake chamber of the heat exchange core. At this time, the waste hot air in the poultry and livestock house passes through the exhaust air filter and enters the exhaust chamber of the heat exchange core at the same time. The air intake chamber and the exhaust chamber of the heat exchange core exchange heat or heat and moisture. The cold air heats up after passing through the heat exchange core and enters the air duct with holes through the pipe elbow in the poultry and livestock house, and distributes the hot air evenly in the poultry and livestock house through the openings on the air duct, so that the equipment has the ability of low-temperature ventilation, recovers the heat in the poultry and livestock house, and reduces heat loss.

[0011] Preferably, it also includes a heat exchange core, which is made of synthetic materials, plastics, metals, synthetic metals, etc. and is sprayed with anti-corrosion materials on its surface to make it resistant to acid and alkali corrosion, and is sprayed with hydrophobic materials on its surface, and a temperature sensor is arranged in the heat exchange core; the hydrophobic materials on the surface of the heat exchange core enable water droplets on its surface to quickly separate from the heat exchange core due to gravity or the flow rate of the air flow, preventing water droplets from frosting or freezing on the heat exchange core and affecting its efficient heat exchange efficiency, thereby improving the practicality of the device, and the intelligent ring controller monitors the temperature in the heat exchange core through the temperature sensor in the heat exchange core, and turns on the heating wire to defrost or pre-defrost the heat exchange core when the temperature is lower than the preset value, ensuring that the heat exchange core operates efficiently without frosting to ensure extremely high heat exchange efficiency.

[0012] Preferably, it also includes an air inlet pipe and an electric heater. The input end of the outer frame is directly connected to the outside of the poultry and livestock house through a group of air inlet pipes, and an electric heater and an electric valve are installed on the air inlet pipe; when the outdoor temperature is lower than minus fifteen degrees Celsius, the electric heater and the electric valve on the air inlet pipe are turned on to allow the outside air to directly enter the inside of the air inlet pipe, and the electric heater is used to assist in heating the outside air to prevent ultra-low temperature air from causing frost on the air filter in the air filter box, affecting the normal ventilation effect.

[0013] Preferably, the air filter box is a box that is square, round or a combination of other shapes. The air filter box is installed outside the poultry and livestock house. The air filter box is provided with 1-8 legs to support the box. The air filter is installed on one side of the box and the variable speed fan is installed on the other side of the box. An inspection door is provided on the side of the air filter box, and a rat-proof, bird-proof, insect-proof, mosquito-proof and dust-proof mesh cover is provided on the side where the air filter is installed; the inspection door on the air filter box facilitates cleaning and maintenance inside the air filter box, and by providing a rat-proof, bird-proof, insect-proof, mosquito-proof and dust-proof mesh cover on the side where the air filter is installed, the failure frequency of the equipment is reduced and the service life of the equipment is increased.

[0014] Preferably, the material of the air duct can be selected from fiber, cloth, plastic, metal, synthetic material, composite material, thermal insulation material, etc. The air duct from the air filter box to the poultry and livestock house can be connected by one or more air ducts in combination; according to the differences in the geographical environment of the use area, air ducts of different materials are selected to improve the practicality of the equipment, and different numbers of air ducts are selected according to the internal space distribution of the installed poultry and livestock house to improve the ventilation effect.

[0015] Compared with the existing technology, the beneficial effects of the present invention are: through the control device combined with the spring and autumn device, the summer device and the heat recovery system, it can adapt to the impact of environmental changes in extremely cold areas and areas with distinct four seasons on the ventilation of poultry and livestock houses, and change the ventilation mode according to different seasonal characteristics to reduce the carbon emissions of the equipment; the mutual switching of equipment working modes can minimize the energy consumption of poultry and livestock houses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the first type of cross-sectional structure of the present invention; Figure 2 It is a schematic diagram of the second type of cross-sectional structure of the present invention; Figure 3 This invention Figure 1 Part A is a schematic diagram of the partially enlarged structure; Figure 4 This is a schematic diagram of the heat recovery system equipment structure adapted to ultra-low temperature environments; Figure 5 It is a schematic diagram of the connection between the smart ring controller and various sensors; Figure 6 This is a schematic diagram of the heat recovery system equipment structure adapted to low temperature environments; Figure 7 This is a schematic diagram of the smart ring controller and the switch control of various electrical appliances in the equipment.

[0017] Markings in the attached figure: 1. Poultry and livestock house; 2. Air filter box; 3. Air filter; 4. Inlet variable-speed fan; 5. Air duct; 6. Wet curtain; 7. Exhaust variable-speed fan; 8. Outer frame; 9. Heat exchange core; 10. Exhaust air filter; 11. Electric heater; 12. Exhaust fan; 13. Electric valve; 15. Inlet duct. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] Example 1: like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the control device is connected to the summer device and the spring and autumn device; Under the condition of a suitable environment and no plague virus, the air inlet variable-speed fan 4 is turned on to send outside air into the multiple groups of air ducts 5 connected to it, and the outside air is accurately sent to the required area through the holes on the air ducts 5, and the outside air is filtered through the air filter box 2 and the air filter 3 to reduce the entry of viruses in the outside air into the house. The control device is used to monitor the air pressure inside and outside the livestock house 1, and the speed of the air inlet variable-speed fan 4 is controlled according to the air pressure information, so that the pressure range in the livestock house 1 is between negative 500 Pa and positive 500 Pa. According to the breeding type and age of the breeding type, combined with the temperature, pressure, humidity, carbon dioxide concentration, ammonia concentration and other information in the livestock house 1, the variable-speed fan is controlled to perform low-power precise air supply to meet the required ventilation volume. The old house can be renovated at a lower cost to isolate viruses from entering the livestock house 1 through the air. The efficient operation of the air inlet variable-speed fan 4 can save users a lot of electricity costs. The high-pressure and high-efficiency characteristics of the air inlet variable-speed fan 4 can also reduce the frequency of replacing the air filter 3 for users. times, thereby providing a transformation plan and operation plan for energy conservation and emission reduction, and reducing operating energy consumption; the external environmental conditions in the livestock house 1 are monitored by the control device. When the temperature is high in summer, the virus activity is low. The control device controls the wet curtain 6 and the exhaust fan 12 to open during the high temperature period, and at the same time closes the spring and autumn device, so that the system switches to summer mode. The exhaust fan 12 sends external air into the livestock house 1 at high speed and cooperates with the wet curtain 6 to evaporate, cool the body surface of the livestock, and can reduce the temperature to a range suitable for the livestock. The suitable temperature can not only improve the growth efficiency of the livestock but also reduce the death caused by excessive temperature or reduce the breeding cost caused by reduced feed intake; this ventilation mode does not require an air filter for biological protection. This ventilation mode not only does not require an air filter, but the pressure at the fan end is also reduced due to the lack of a filter. At this time, the load on the fan end is reduced and the energy consumption is reduced, and the consumables of the air filter are zero. This ventilation mode can greatly reduce the operating power of the exhaust fan, reduce the frequency of replacing the air filter, and thus reduce carbon emissions.

[0020] Specifically, the control device includes an intelligent environmental controller, multiple groups of air pressure sensors, multiple groups of temperature sensors, multiple groups of carbon dioxide sensors and multiple groups of ammonia sensors. The signal output ends of all sensors are connected to the intelligent environmental controller, and the intelligent environmental controller controls the switches of all electrical appliances in the equipment.

[0021] Specifically, the spring and autumn device includes a poultry house 1, an air filter box 2, an air filter 3, an air inlet variable-speed fan 4 and an air duct 5. The air inlet variable-speed fan 4 is installed on the air inlet of the poultry house 1, and the input end of the air inlet variable-speed fan 4 is connected to the air filter box 2. The air filter 3 is connected to the inside of the air filter box 2. The air inlet of the poultry house 1 is connected to multiple groups of air ducts 5. The distribution of the multiple groups of air ducts 5 is arranged according to the spatial structure inside the poultry house 1. Holes are opened at different positions on the air duct 5 according to usage requirements, and exhaust outlets are set on the roof or side wall of the poultry house 1.

[0022] Specifically, the summer device includes a wet curtain 6 and an exhaust fan 12. Multiple groups of exhaust fans 12 are installed horizontally or vertically on the outer surface of the livestock house 1. The output end of the exhaust fan 12 is connected to the interior of the livestock house 1, and a wet curtain 6 is installed on the output end of the exhaust fan 12.

[0023] This embodiment can adapt to the impact of changes in normal temperature environment and summer temperature environment on the ventilation of poultry and livestock houses by controlling the device in conjunction with the spring and autumn device and the summer device; the mutual switching of the equipment working modes can minimize the energy consumption of the poultry and livestock houses, and can ensure that advanced ventilation concepts and excellent breeding results contribute to the country's carbon emission reduction, thereby improving the practicality of the device.

[0024] Example 2: This embodiment is improved on the basis of embodiment 1 and further includes a control device and a heat recovery system; By combining the control device with the heat recovery system, it is possible to adapt to the impact of temperatures in extremely cold areas on the ventilation process, change the ventilation method according to different low-temperature environmental characteristics, and reduce the carbon emissions of the equipment.

[0025] Specifically, the heat recovery system includes an exhaust variable-speed fan 7, an outer frame 8, a heat exchange core 9 and an exhaust air filter 10. The outer frame 8 is installed inside the poultry and livestock house 1 through a frame, and the exhaust variable-speed fan 7 and multiple groups of exhaust air filters 10 are installed on the outer frame 8. The output end of the exhaust variable-speed fan 7 is connected to the outside of the poultry and livestock house 1, and the heat exchange core 9 is installed inside the casing formed by the outer frame 8. The output end of the air inlet variable-speed fan 4 is connected to the outer frame 8 through a group of air ducts 5. Electric valves 13 are provided on the input ends of all air ducts 5. The output end of the exhaust variable-speed fan 7 is connected to multiple groups of air ducts 5 with openings.

[0026] Specifically, it also includes a heat exchange core 9, which is made of synthetic materials, plastics, metals, synthetic metals, etc. and sprayed with anti-corrosion materials on its surface to make it resistant to acid and alkali corrosion, and sprayed with hydrophobic base materials on its surface. A temperature sensor is provided in the heat exchange core 9.

[0027] Specifically, it also includes an air inlet pipe 15 and an electric heater 11. The input end of the outer frame 8 is directly connected to the outside of the livestock house 1 through a group of air inlet pipes 15. The electric heater 11 and the electric valve 13 are installed on the air inlet pipe 15.

[0028] Specifically, the control device includes an intelligent environmental controller, multiple groups of air pressure sensors, multiple groups of temperature sensors, multiple groups of carbon dioxide sensors and multiple groups of ammonia sensors. The signal output ends of all sensors are connected to the intelligent environmental controller, and the intelligent environmental controller controls the switches of all electrical appliances in the equipment.

[0029] like Figures 1 to 7As shown, when the poultry and livestock house ventilation system of the present invention is working, it first monitors the environment inside and outside the house through the intelligent environmental controller and multiple sensors. When the outdoor temperature is suitable and there is no plague virus, the air inlet variable speed fan 4 is turned on to send outside air into the multiple groups of air ducts 5 connected to it, and the outside air is accurately sent to the required area through the holes on the air duct 5 for exhaust. When the temperature is high in summer and the virus activity is low, the control device controls the wet curtain 6 and the exhaust fan 12 to open during the high temperature period, and at the same time closes the spring and autumn device to switch the system to summer mode. The exhaust fan 12 sends outside air into the interior of the poultry and livestock house 1 at high speed and cooperates with the wet curtain 6 to evaporate and cool the body surface of the poultry and livestock. When the lowest temperature in winter is above minus fifteen degrees Celsius, the four heat exchange core 9 modules are installed in the house in the form of assembly or splicing, and the air filter 3 and the air inlet variable speed fan 4 are used and the electric valve 13 on the air duct 5 inside the poultry and livestock house 1 is closed, so that the outside air cannot directly enter the air duct 5 provided with the opening. The air duct 5 enters the interior of the livestock house 1, and the electric valve 13 on the air duct 5 connected to the outer frame 8 is opened. At this time, the outside cold air passes through the air filter 3 and the air inlet variable speed fan 4 and enters the interior of the outer frame 8, and enters the air inlet chamber of the heat exchange core 9. At this time, the waste hot air in the livestock house 1 passes through the exhaust air filter 10 and enters the exhaust chamber of the heat exchange core 9 at the same time. The air inlet chamber and the exhaust chamber of the heat exchange core 9 exchange heat or exchange heat and moisture. The cold air rises after passing through the heat exchange core 9. The temperature is collected and enters the air duct 5 with holes through the pipe elbows in the livestock house 1, and the hot air is evenly distributed in the livestock house 1 through the openings on the air duct 5. When the outdoor temperature is lower than minus fifteen degrees Celsius, the electric heater 11 and the electric valve 13 on the air inlet pipe 15 are turned on to allow the outside air to directly enter the inside of the air inlet pipe 15, and the electric heater 11 can be used to assist in heating the outside air. At this time, the air entering the house passes through the exhaust air filter 10, enters the heat exchange system, and is then discharged into the air duct 5.

[0030] The wet curtain 6, electric valve 13, exhaust fan 12, air filter 3, air inlet variable speed fan 4, exhaust variable speed fan 7, heat exchange core 9, electric heater 11, smart ring controller, air pressure sensor, temperature sensor, carbon dioxide sensor and ammonia sensor of the present invention are purchased on the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to make creative labor.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, they can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A poultry house ventilation and heat recovery system, characterized in that: The system comprises a control device, a spring and autumn device, a summer device and a heat recovery system. The control device controls the switches of all electrical appliances in the system. The spring and autumn device, the summer device and the heat recovery system are interconnected. The heat recovery system is installed inside the livestock house (1).

2. A poultry house ventilation and heat recovery system according to claim 1, characterized in that: The control device includes an intelligent environmental controller, multiple groups of air pressure sensors, multiple groups of temperature sensors, multiple groups of carbon dioxide sensors and multiple groups of ammonia sensors. The signal output ends of all sensors are connected to the intelligent environmental controller, and the intelligent environmental controller controls the switches of all electrical appliances in the equipment.

3. The poultry house ventilation and heat recovery system according to claim 1, characterized in that: The spring and autumn device comprises a livestock house (1), an air filter box (2), an air filter (3), an air inlet variable speed fan (4) and an air duct (5). The air inlet of the livestock house (1) is equipped with an air inlet variable speed fan (4), the input end of the air inlet variable speed fan (4) is connected to the air filter box (2), the air filter (3) is connected inside the air filter box (2), and the air inlet of the livestock house (1) is connected to multiple groups of air ducts (5). The distribution of the multiple groups of air ducts (5) is arranged according to the spatial structure inside the livestock house (1). Holes are opened at different positions on the air duct (5) according to usage requirements, and exhaust outlets are set on the roof and side walls of the livestock house (1).

4. The poultry house ventilation and heat recovery system according to claim 1, characterized in that: The summer device includes a wet curtain (6) and an exhaust fan (12). Multiple groups of exhaust fans (12) are installed horizontally and vertically on the outer surface of the livestock house (1). The output end of the exhaust fan (12) is connected to the interior of the livestock house (1). The wet curtain (6) is installed on the output end of the exhaust fan (12).

5. The poultry house ventilation and heat recovery system according to claim 1, characterized in that: The heat recovery system includes an exhaust variable speed fan (7), an outer frame (8), a heat exchange core (9) and an exhaust air filter (10). The outer frame (8) is installed inside the livestock house (1) through a frame. The exhaust variable speed fan (7) and multiple groups of exhaust air filters (10) are installed on the outer frame (8). The output end of the exhaust variable speed fan (7) is connected to the outside of the livestock house (1). The heat exchange core (9) is installed inside the casing formed by the outer frame (8). The output end of the air inlet variable speed fan (4) is connected to the outer frame (8) through a group of air ducts (5). Electric valves (13) are provided on the input ends of all air ducts (5). The output end of the exhaust variable speed fan (7) is connected to the multiple groups of air ducts (5) provided with openings.

6. The poultry house ventilation and heat recovery system according to claim 5, characterized in that: The heat exchange core (9) is made of plastic, metal or synthetic metal, and is sprayed with anti-corrosion material on its surface to make it resistant to acid and alkali corrosion, and is sprayed with hydrophobic material on its surface. A temperature sensor is provided in the heat exchange core (9).

7. The poultry house ventilation and heat recovery system according to claim 5, characterized in that: It also includes an air inlet pipe (15) and an electric heater (11). The input end of the outer frame (8) is directly connected to the outside of the livestock house (1) through a group of air inlet pipes (15). The air inlet pipe (15) is equipped with an electric heater (11) and an electric valve (13).

8. The poultry house ventilation and heat recovery system according to claim 3, characterized in that: The invention also includes an air filter box (2) which is a square box, the air filter box (2) is installed outside the livestock house (1), 1 to 8 legs are provided on the air filter box (2) for support, the air filter (3) is installed on one side of the air filter box (2), the air inlet variable speed fan (4) is installed on the other side of the air filter box (2), an inspection door is provided on the side of the air filter box (2), and a rodent-proof, bird-proof, insect-proof, mosquito-proof and dust-proof net cover is provided on the side where the air filter (3) is installed.

9. The poultry house ventilation and heat recovery system according to claim 3, characterized in that: The material of the air duct (5) includes fiber, plastic, metal or composite thermal insulation material, and the air duct (5) from the air filter box (2) to the poultry house (1) is selected to be connected in combination with multiple air ducts (5).

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