A ventilation and heat recovery system for a poultry or livestock house

Abstract

The present application relates to the field of poultry and livestock house ventilation technology, in particular to a poultry and livestock house ventilation and heat recovery system, comprising a control device, a spring and autumn device, a summer device and a heat recovery system, the control device controls the on-off of all electrical appliances of the system, the spring and autumn device, the summer device and the heat recovery system are connected with each other, and the heat recovery system is installed in the poultry and livestock house, which can adapt to the influence of the environment change of extremely cold regions and regions with distinct seasons on the ventilation of the poultry and livestock house through the cooperation of the control device, the spring and autumn device, the summer device and the heat recovery system, and change the ventilation mode according to different seasonal characteristics, thereby reducing the carbon emission of the equipment; the mutual switching of the working modes of the equipment can maximize the reduction of the energy consumption of the poultry and livestock house.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology for poultry and livestock houses, and in particular to a ventilation and heat recovery system for poultry and livestock houses. Background Technology

[0002] With social development and progress, energy conservation and emission reduction have been extended to the actual production of poultry and livestock houses. Under these circumstances, the high energy consumption of ventilation and the high cost of winter heating in poultry and livestock houses have become a pain point for breeding groups and individual farmers. At present, most ventilation and heat recovery solutions for poultry and livestock houses are still in the low-efficiency stage of longitudinal ventilation and preheating mode for heat exchange. The tubular heat exchange solution is too expensive to be widely used due to the large size of the heat exchange box and the thick insulation layer of the box. The tubular heat recovery box is also large and can only be placed outside the house. In extremely cold regions, the heat exchange core will frost, which will reduce the heat recovery efficiency or even block it, causing poultry and livestock to die from hypoxia and causing greater losses. Intelligent environmental controllers, also known as intelligent environmental controllers, are high-tech devices that integrate multiple environmental parameter monitoring and control functions. They can monitor and control environmental parameters in a specific space in real time, such as temperature, humidity, air quality, and noise, to create a more comfortable, safe, and energy-saving living and working environment. Intelligent environmental controllers are programmable controllers based on PLC or single-board computers.

[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, which can utilize geothermal energy to maintain the temperature inside the poultry and livestock breeding house within a certain range to meet the breeding needs.

[0004] However, in actual use, the above-mentioned devices do not have the ability to adapt to seasonal changes, especially the ventilation changes in areas with large temperature differences, and do not have the ability to automatically switch ventilation modes according to different seasonal characteristics, resulting in large carbon emissions. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a ventilation and heat recovery system for poultry and livestock houses. By combining a control device with spring / autumn devices, summer devices, and a heat recovery system, it adapts to the impact of environmental changes in extremely cold regions and regions with distinct seasons on the ventilation of poultry and livestock houses. It also changes the ventilation mode according to different seasonal characteristics to reduce the carbon emissions of the equipment. Furthermore, by switching between different operating modes of the equipment, it minimizes the energy consumption of poultry and livestock houses.

[0006] To achieve the above objectives, the present invention provides a ventilation and heat recovery system for poultry and livestock houses; including a control device, a spring and autumn device, a summer device, and a heat recovery system. The control device controls the switching 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 poultry and livestock house.

[0007] Preferably, the control device includes an intelligent environmental controller, multiple sets of air pressure sensors, multiple sets of temperature sensors, multiple sets of carbon dioxide sensors, and multiple sets of ammonia sensors. The signal output terminals of all sensors are connected to the intelligent environmental controller, which controls the switching of all electrical appliances in the equipment. Through the intelligent environmental controller and multiple sensors, the environment inside and outside the shed is monitored, and the activation of the spring and autumn device, summer device, and heat recovery system is switched according to changes in environmental information. This adapts to the impact of environmental changes in extremely cold regions and regions with distinct seasons on the ventilation of poultry and livestock sheds, thereby reducing the carbon emissions of the equipment.

[0008] Preferably, the spring and autumn air conditioning system includes a livestock house, an air filter housing, an air filter, an intake variable-speed fan, and air ducts. An intake variable-speed fan is installed at the air inlet of the livestock house, and the input end of the intake variable-speed fan is connected to the air filter housing. An air filter is connected inside the air filter housing. Multiple sets of air ducts are connected inside the air inlet of the livestock house. The distribution of these air ducts is based on the spatial structure of the livestock house. Openings are made in different locations on the air ducts according to usage requirements. Exhaust vents are installed on the roof or side walls of the livestock house. Under suitable environmental conditions and without disease viruses, the intake variable-speed fan is turned on to deliver outside air into the multiple sets of air ducts connected to it. The outside air is precisely delivered to the required area through the openings in the air ducts, and then filtered by the air filter housing and the air filter to reduce air pollution. This system minimizes the entry of viruses from the outside air into the livestock shed. By monitoring the air pressure inside and outside the shed with a control system, the speed of the variable-speed intake fan is adjusted based on the air pressure information, maintaining the pressure range within the shed between -500 Pa and +500 Pa. Based on the species and age of the livestock, combined with information on temperature, pressure, humidity, carbon dioxide concentration, and ammonia concentration within the shed, the variable-speed fan is controlled to deliver precise, low-power airflow to meet the required ventilation volume. This allows for cost-effective renovation of old sheds to prevent viruses from entering the livestock shed through the air. The efficient operation of the variable-speed intake fan saves users significant electricity costs, and its high-pressure, high-efficiency characteristics reduce the frequency of air filter replacements, thus providing energy-saving and emission-reducing renovation and operation solutions, and lowering operating energy consumption.

[0009] Preferably, the summer system includes evaporative cooling pads and exhaust fans. Multiple exhaust fans are installed horizontally or vertically on the outer side of the livestock shed. The output ends of the exhaust fans are connected to the interior of the livestock shed, and evaporative cooling pads are installed on the output ends of the exhaust fans. A control device monitors the external environmental conditions inside and outside the livestock shed. When summer temperatures are high and viral activity is low, the control device activates the evaporative cooling pads and exhaust fans during high-temperature periods, while simultaneously shutting down the spring / autumn system, switching the system to summer mode. The exhaust fans rapidly deliver outside air into the livestock shed, which, combined with the evaporation from the evaporative cooling pads, cools the surface of the livestock. The ventilation system can lower the temperature to a suitable range for poultry and livestock. A suitable temperature can not only improve the growth efficiency of poultry and livestock, but also reduce the mortality caused by excessively high temperatures or reduced feed intake, thus reducing the overall breeding performance. This ventilation mode can eliminate the need for air filters for biological protection. Not only does this ventilation mode eliminate the need for air filters, but the pressure at the fan end is also reduced due to the absence of filters. At this time, the load at the fan end is reduced, energy consumption is reduced, and the consumables of air filters are zero. This ventilation mode can greatly reduce the operating power of the exhaust fan and the frequency of air filter replacement, thereby reducing 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 via a frame. The exhaust variable-speed fan and multiple sets 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 intake variable-speed fan is connected to the outer frame via a set of air ducts. All air ducts are equipped with electric valves at their input ends. The output end of the exhaust variable-speed fan is connected to multiple sets of air ducts with openings. When the minimum winter temperature is above -15 degrees Celsius, the four heat exchange core modules are installed inside the house in an assembled or spliced ​​manner, using air filters and intake variable-speed fans while closing the air ducts leading into the poultry and livestock house from the output end of the intake variable-speed fan. The electric valve on the upper part prevents outside air from directly entering the poultry and livestock house through the perforated duct. When the electric valve on the duct connected to the outer frame is opened, outside cold air enters the outer frame after passing through the air filter and the intake variable speed fan, and then enters the air intake chamber of the heat exchange core. At the same time, the waste heat air in the poultry and livestock house enters the exhaust chamber of the heat exchange core through the exhaust air filter. The air intake chamber and exhaust chamber of the heat exchange core exchange heat or heat and moisture. The cold air is heated after passing through the heat exchange core and enters the perforated duct through the pipe bends in the poultry and livestock house. The hot air is evenly distributed in the poultry and livestock house through the openings on the duct, enabling the equipment to have the ability to exchange air at low temperatures, recover heat in the poultry and livestock house and reduce heat loss.

[0011] Preferably, the device also includes a heat exchange core. The heat exchange core is made of synthetic materials, plastics, metals, or synthetic metals, and its surface is coated with anti-corrosion materials to make it resistant to acid and alkali corrosion, and with a hydrophobic material. A temperature sensor is installed inside the heat exchange core. The hydrophobic material on the surface of the heat exchange core causes water droplets to quickly detach from the heat exchange core due to gravity or airflow, preventing water droplets from frosting or freezing on the heat exchange core and affecting its high heat exchange efficiency, thus improving the practicality of the device. The intelligent loop controller monitors the temperature inside the heat exchange core through the temperature sensor inside the heat exchange core. When the temperature is lower than the preset value, the heating wire is activated to defrost or pre-defrost the heat exchange core, ensuring that the heat exchange core operates efficiently without frosting, thereby ensuring extremely high heat exchange efficiency.

[0012] Preferably, it also includes an air inlet duct 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 set of air inlet ducts. An electric heater and an electric valve are installed on the air inlet duct. When the outdoor temperature is below minus 15 degrees Celsius, the electric heater and electric valve on the air inlet duct are opened to allow outside air to enter the air inlet duct directly. The electric heater then provides auxiliary heating to the outside air to prevent frost from forming on the air filter inside the air filter box due to the extremely low temperature air, which would affect the normal ventilation effect.

[0013] Preferably, the air filter housing is a square, round, or other combination of shapes. The air filter housing is installed outside the poultry and livestock shed. The air filter housing is supported by 1-8 legs. The air filter is installed on one side of the housing, and the variable speed fan is installed on the other side. An inspection door is provided on the side of the air filter housing. A rodent-proof, bird-proof, insect-proof, mosquito-proof, and dust-proof netting is provided on the side where the air filter is installed. The inspection door on the air filter housing facilitates cleaning and maintenance of the air filter housing. By providing rodent-proof, bird-proof, insect-proof, mosquito-proof, and dust-proof netting 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 materials of the air ducts can be selected from fiber, cloth, plastic, metal, synthetic materials, composite materials, insulation materials, etc. The air ducts entering the poultry and livestock house from the air filter box can be one or more air ducts connected in combination. Different materials of air ducts are selected according to the differences in the geographical environment of the area of ​​use to improve the practicality of the equipment. Different numbers of air ducts are selected to connect according to the internal space distribution of the poultry and livestock house where they are installed to improve the ventilation effect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by using a control device in conjunction with spring and autumn devices, summer devices and heat recovery systems, it can adapt to the impact of environmental changes in extremely cold regions and regions with distinct 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. Attached Figure Description

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

[0017] The following are labeled in the attached diagram: 1. Livestock shed; 2. Air filter housing; 3. Air filter; 4. Inlet variable speed fan; 5. Air duct; 6. Evaporative cooling pad; 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 Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given 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. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[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 / autumn device; Under suitable environmental conditions and free from disease viruses, the variable-speed intake fan 4 is turned on to deliver outside air into the multiple sets of air ducts 5 connected to it. The outside air is precisely delivered to the required areas through the holes in the air ducts 5. The outside air is filtered through the air filter housing 2 and air filter 3, reducing the entry of viruses into the livestock shed. The control device monitors the air pressure inside and outside the livestock shed 1, and controls the speed of the variable-speed intake fan 4 based on the air pressure information, maintaining the pressure range inside the livestock shed 1 between -500 Pa and +500 Pa. Based on the species and age of the livestock, combined with information such as temperature, pressure, humidity, carbon dioxide concentration, and ammonia concentration inside the livestock shed 1, the variable-speed fan is controlled to deliver precise airflow at low power to meet the required ventilation volume. This allows for cost-effective renovation of old sheds to prevent viruses from entering the livestock shed 1 through the air. The efficient operation of the variable-speed intake fan 4 saves users significant electricity costs, and its high-pressure, high-efficiency characteristics also reduce the frequency of air filter 3 replacement. This provides energy-saving and emission-reduction renovation and operation schemes, reducing operating energy consumption. The control device monitors the internal and external environmental conditions of the poultry and livestock house 1. When summer temperatures are high and virus activity is low, the control device activates the wet curtain 6 and exhaust fan 12 during high-temperature periods, while simultaneously shutting off the spring and autumn devices, switching the system to summer mode. The exhaust fan 12 rapidly delivers outside air into the poultry and livestock house 1, working in conjunction with the evaporation of the wet curtain 6 to cool the surface of the poultry and livestock, lowering the temperature to a suitable range. A suitable temperature not only improves the growth efficiency of the poultry and livestock but also reduces mortality or reduced feed intake caused by excessively high temperatures, thus lowering breeding costs. This ventilation mode eliminates the need for air filters for biological protection. Not only does it eliminate the need for air filters, but the pressure at the fan end is also reduced due to the absence of filters. This reduces the load on the fan end, lowers energy consumption, and eliminates the need for air filter consumables. This ventilation mode significantly reduces the operating power of the exhaust fan and the frequency of air filter replacement, thereby reducing carbon emissions.

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

[0021] Specifically, the spring and autumn equipment includes a poultry and livestock house 1, an air filter box 2, an air filter 3, an intake variable speed fan 4, and air ducts 5. An intake variable speed fan 4 is installed on the air inlet of the poultry and livestock house 1. The input end of the intake variable speed fan 4 is connected to the air filter box 2. An air filter 3 is connected inside the air filter box 2. Multiple sets of air ducts 5 are connected inside the air inlet of the poultry and livestock house 1. The distribution of the multiple sets of air ducts 5 is arranged according to the internal spatial structure of the poultry and livestock house 1. Openings are made in different parts of the air ducts 5 according to the usage requirements. Exhaust vents are set on the roof or side wall of the poultry and livestock house 1.

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

[0023] This embodiment, through the control device in conjunction with the spring / autumn device and the summer device, can adapt to the impact of normal temperature environment and summer temperature environment changes on the ventilation of poultry and livestock houses; the switching between the working modes of the equipment can minimize the energy consumption of poultry and livestock houses, thus improving the practicality of the device.

[0024] Example 2: This embodiment is an improvement on embodiment 1, and also includes a control device and a heat recovery system; By using control devices in conjunction with a heat recovery system, it is possible to adapt to the impact of temperature on the ventilation process in extremely cold regions and change the ventilation method according to different low-temperature environmental characteristics, thereby reducing 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 via a frame. The exhaust variable speed fan 7 and multiple sets 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. The heat exchange core 9 is installed inside the casing formed by the outer frame 8. The output end of the intake variable speed fan 4 is connected to the outer frame 8 via a set of air ducts 5. Electric valves 13 are installed on the input ends of all air ducts 5. The output end of the exhaust variable speed fan 7 is connected to multiple sets 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 is coated with anti-corrosion materials to make it resistant to acid and alkali corrosion, and is coated with hydrophobic materials. A temperature sensor is installed inside 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 poultry and livestock house 1 through a set of air inlet pipes 15. An electric heater 11 and an electric valve 13 are installed on the air inlet pipes 15.

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

[0029] like Figures 1 to 7As shown, the poultry and livestock house ventilation system of the present invention first monitors the environment inside and outside the house through an intelligent environmental controller and multiple sensors. When the outdoor temperature is suitable and there is no epidemic virus, the intake variable speed fan 4 is turned on to send outside air into the multiple sets of air ducts 5 connected to it. The outside air is accurately delivered to the required area for exhaust through the holes on the air ducts 5. When the summer temperature is high and the virus activity is low, the control device controls the evaporative cooling pad 6 and the exhaust fan 12 to be turned on during the high temperature period, while the spring and autumn device is turned off, so that the system switches to summer mode. The exhaust fan 12 sends outside air into the poultry and livestock house 1 at high speed and works with the evaporative cooling pad 6 to cool the surface of the poultry and livestock. When the winter minimum temperature is above minus 15 degrees Celsius, the four heat exchange core modules 9 are installed in the house in the form of assembly or splicing. The air filter 3 and the intake variable speed fan 4 are used, and the electric valve 13 on the air duct 5 inside the poultry and livestock house 1 at the output end of the intake variable speed fan 4 is closed, so that outside air cannot be directly delivered through the duct with openings. The air duct 5 enters the interior of the poultry and livestock house 1. The electric valve 13 on the air duct 5, which connects to the outer frame 8, is opened. At this time, outside cold air passes through the air filter 3 and the intake variable speed fan 4 before entering the interior of the outer frame 8 and then into the intake chamber of the heat exchange core 9. Meanwhile, waste heat air in the poultry and livestock house 1 passes through the exhaust air filter 10 and simultaneously enters the exhaust chamber of the heat exchange core 9. The intake and exhaust chambers of the heat exchange core 9 exchange heat or heat and moisture. The cold air rises after passing through the heat exchange core 9. The hot air enters the perforated air duct 5 through pipe bends and other openings in the poultry and livestock house 1, and is evenly distributed in the poultry and livestock house 1 through the openings on the air duct 5. When the outdoor temperature is below minus 15 degrees Celsius, the electric heater 11 and electric valve 13 on the air inlet duct 15 are turned on, so that the outside air can directly enter the air inlet duct 15 and be heated by the electric heater 11. 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, intake variable speed fan 4, exhaust variable speed fan 7, heat exchange core 9, electric heater 11, intelligent ring controller, air pressure sensor, temperature sensor, carbon dioxide sensor and ammonia sensor of the present invention are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A ventilation and heat recovery system for poultry and livestock houses, characterized in that, The system includes a control device, a spring / autumn device, a summer device, and a heat recovery system. The control device controls the switching of all electrical appliances in the system. The spring / autumn device, the summer device, and the heat recovery system are interconnected. The heat recovery system is installed inside the poultry house (1). The spring / autumn device includes the poultry house (1), an air filter housing (2), an air filter (3), an intake variable speed fan (4), and an air duct (5). An intake variable speed fan (4) is installed on the air inlet of the poultry house (1). The input end of the intake variable speed fan (4) is connected to the air filter housing (2). The air filter housing (2) is connected to an air filter (3). The air inlet of the poultry house (1) is connected to multiple sets of air ducts (5). The distribution of the multiple sets of air ducts (5) is arranged according to the internal spatial structure of the poultry house (1). The air ducts (5) are opened at different locations according to the usage requirements. Exhaust vents are set on the roof and side walls of the poultry house (1). The control device includes an intelligent environmental controller, multiple sets of air pressure sensors, multiple sets of temperature sensors, multiple sets of carbon dioxide sensors and multiple sets of ammonia sensors. The signal output terminals of all sensors are connected to the intelligent environmental controller. The system is connected to an intelligent environmental controller, which controls the switching of all electrical appliances in the equipment. The summer device includes a wet curtain (6) and an exhaust fan (12). Multiple sets of exhaust fans (12) are installed horizontally and vertically on the outer side of the poultry house (1). The output end of the exhaust fan (12) is connected to the interior of the poultry house (1). A wet curtain (6) is installed on the output end of the exhaust fan (12). 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 mounted on a frame. The exhaust variable speed fan (7) and multiple sets of exhaust air filters (10) are installed inside the poultry and livestock house (1). The output end of the exhaust variable speed fan (7) is connected to the outside of the poultry and 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 intake variable speed fan (4) is connected to the outer frame (8) through a set of air ducts (5). Electric valves (13) are installed on the input end of all air ducts (5). The output end of the exhaust variable speed fan (7) is connected to multiple sets of air ducts (5) with openings.During operation, the system first monitors the environment inside and outside the house using an intelligent environmental controller and various sensors. When the outdoor temperature is suitable and there is no plague virus, the intake variable speed fan (4) is turned on to send outside air into the multiple sets of air ducts (5) connected to it. The outside air is accurately sent to the required area for exhaust through the holes on the air duct (5). When the summer temperature is high and the virus activity is low, the control device controls the opening of the wet curtain (6) and the exhaust fan (12) 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 poultry house (1) at high speed and works with the wet curtain (6) to evaporate and cool the surface of the poultry. When the winter minimum temperature is above minus 15 degrees Celsius, the four heat exchange core modules (9) are installed in the house in the form of assembly or splicing, using the air filter (3) and the intake variable speed fan (4) and closing the intake variable speed fan (4). The electric valve (13) on the air duct (5) inside the poultry house (1) is opened at the output end, so that the outside air cannot directly enter the poultry house (1) through the air duct (5) with openings. The electric valve (13) on the air duct (5) connected to the outer frame (8) is opened. At this time, the outside cold air enters the outer frame (8) after passing through the air filter (3) and the intake variable speed fan (4), and enters the air intake chamber of the heat exchange core (9). At this time, the waste heat air in the poultry house (1) enters the exhaust chamber of the heat exchange core (9) through the exhaust air filter (10). The air intake chamber and the exhaust chamber of the heat exchange core (9) exchange heat or exchange heat and moisture. The cold air is heated after passing through the heat exchange core (9) and enters the air duct (5) with openings through the pipe bend in the poultry house (1). The hot air is evenly distributed in the poultry house (1) through the openings on the air duct (5).

2. The poultry and livestock house ventilation and heat recovery system as described in claim 1, characterized in that, The heat exchange core (9) is made of plastic or metal, and its surface is coated with anti-corrosion material to make it resistant to acid and alkali corrosion, and its surface is coated with hydrophobic material. A temperature sensor is installed inside the heat exchange core (9).

3. The poultry and livestock house ventilation and heat recovery system as described in claim 2, 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 poultry and livestock house (1) through a set of air inlet pipes (15). An electric heater (11) and an electric valve (13) are installed on the air inlet pipe (15).

4. The poultry and livestock house ventilation and heat recovery system as described in claim 1, characterized in that, The air filter box (2) is a square box. The air filter box (2) is installed outside the poultry and livestock house (1). The air filter box (2) is supported by 1-8 legs. The air filter (3) is installed on one side of the air filter box (2). The air intake variable speed fan (4) is installed on the other side of the air filter box (2). The side of the air filter box (2) is equipped with an inspection door. A rodent-proof, bird-proof, insect-proof, mosquito-proof, and dust-proof net is installed on the side where the air filter (3) is installed.

5. The poultry and livestock house ventilation and heat recovery system as described in claim 1, characterized in that, The material of the air duct (5) includes fiber, plastic, metal or composite insulation material. The air duct (5) from the air filter box (2) into the poultry house (1) is composed of multiple connected parts.

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