Pig farm environment control device based on radiation heat transfer

Abstract

The piggery environment control device comprises a piggery, an air conditioner all-in-one machine is installed outside the piggery, a wet film evaporator is arranged at the top of the air conditioner all-in-one machine, an air supply pipe is connected into an air outlet of the wet film evaporator, and the air supply pipe is suspended in the piggery; a plurality of radiation refrigeration breast board systems are arranged in the hog house, an exhaust duct is arranged under the ground of the hog house, and an exhaust fan used for exhausting air is arranged in the exhaust duct. The hog house has the advantages of low energy consumption, high operation efficiency, small ventilation amount, good air quality, small odor emission amount, relatively low operation cost and the like, and the purposes of low energy consumption and efficient environment control of the hog house are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pig farm breeding environment control, and in particular to a pig farm environment control device based on radiation heat transfer. Background Art

[0002] At present, medium and large-scale pigs usually use a water curtain + fan ventilation and cooling system for ventilation and temperature control. The water curtain + fan ventilation and cooling system usually has three modes: positive pressure ventilation, negative pressure ventilation, and positive and negative pressure combined ventilation. All three modes use the evaporation of water in the wet curtain to reduce the air temperature, and the fan brings the cooled air into the pig house to cool the pig house. The water curtain and the fan are located at both ends of the pig house. Although this method has the advantages of simple equipment, high cooling efficiency, reliable installation and operation, it also has problems such as large ventilation volume, large air filtration and odor treatment volume, high relative humidity in the house, ventilation dead corners, and difficulty in biosafety prevention and control.

[0003] In order to better reduce equipment operating costs, improve pig house cooling efficiency and air quality, reduce air purification and odor treatment loads, and improve the biosafety control level of pig houses, it is necessary to develop a new pig farm environmental control device. Summary of the invention

[0004] The purpose of the present invention is to provide a pig farm environmental control device based on radiation heat transfer, which has the advantages of low energy consumption, high operating efficiency, small ventilation volume, good air quality, small odor emissions and relatively low operating cost. It is a low-carbon energy-saving environmental control system with the advantages of low energy consumption in pig houses and efficient environmental control.

[0005] The present invention adopts the following technical solution.

[0006] A pig farm environmental control device based on radiation heat transfer, comprising a pig house, an air-conditioning integrated unit installed on the outside of the pig house, a wet film evaporator arranged on the top of the air-conditioning integrated unit, an air supply pipe connected to the exhaust port of the wet film evaporator, and the air supply pipe suspended on the top of the pig house, a plurality of radiation temperature control fence systems are arranged inside the pig house, and are symmetrically arranged in two rows in the pig house, a sidewalk is arranged between the two rows of radiation temperature control fence systems, an exhaust duct is arranged under the ground of the radiation temperature control fence system in the pig house, and an exhaust fan for extracting exhaust air is arranged in the exhaust duct.

[0007] Furthermore, a refrigeration system is provided in the air-conditioning integrated unit. The refrigeration system adopts a mechanical energy scroll compressor for refrigeration and is integrated in the air-conditioning integrated unit.

[0008] Furthermore, the air-conditioning integrated machine is used to control humidity and adjust temperature in the pig house through a refrigeration system arranged inside.

[0009] Furthermore, it also includes a ventilation system, which adopts an airflow circulation method of upper delivery and lower exhaust, and the airflow circulation path is a "Z"-shaped structure in the pig living area and its vicinity (the air supply pipe outlet area is defined as the first horizontal airflow section, the pig living area and the set height area in the upper and lower directions are defined as the vertical section, and the exhaust area is defined as the second horizontal airflow section), and the temperature control airflow generated by the radiation refrigeration plate moves from the circumferential direction of the pig living area to the inner side thereof. The use of such a scheme as one of the core technical innovations of the present invention not only achieves a temperature control effect similar to that of the Laval flow field, but also can achieve temperature control and ventilation more quickly, efficiently and smoothly, which is essentially different from the airflow circulation path in the traditional ventilation and temperature control system that is close to one-way ventilation and smooth temperature control.

[0010] Furthermore, the air supply pipe is in a "U" shape and is made of a PP hollow plate. One end of the air supply pipe has an air inlet, and both sides of the air supply pipe are provided with exhaust holes.

[0011] Furthermore, it also includes a heat recovery system and a deodorization system.

[0012] Furthermore, the radiation temperature control baffle system includes refrigeration baffles, cooling water, chilled water, pumps, valves, pipelines, and a control system.

[0013] Furthermore, a bracket for installation and positioning is provided between every two adjacent refrigeration panels, the refrigeration panels are blackbody radiation temperature control panels, and an outer frame is installed on the outer side of the blackbody radiation temperature control panels, and the blackbody radiation temperature control panels surround the pig living area.

[0014] Furthermore, a base is provided on the bottom side of the bracket, a threaded rod is screwed inside the bracket, the bottom end of the threaded rod is rotatably connected to the top of the base, a swivel is fixedly installed on the top of the threaded rod, threaded cylinders are fixedly installed around the upper and lower ends of the bracket, and a screw-on assembly for connection and positioning is provided between the blackbody radiation temperature control plate and the threaded cylinder.

[0015] Furthermore, the screw-on assembly includes a disc shell fixedly mounted on the side wall of the blackbody radiation temperature control plate, a knob is rotatably connected to the side of the disc shell away from the blackbody radiation temperature control plate, a bolt is fixedly mounted on the side of the knob away from the knob, and the bolt is screwed into the threaded cylinder, a turntable is fixedly mounted on the side of the knob close to the disc shell, and the turntable is rotatably connected to the inside of the disc shell, annular grooves are provided on both sides of the turntable, balls are embedded in the corresponding annular grooves inside the disc shell, and the balls are rollingly connected in the annular grooves.

[0016] Beneficial effects: The present invention not only realizes a temperature control effect similar to that of the Laval flow field in the pig living area, but also can realize temperature control and ventilation more efficiently and smoothly, which is essentially different from the air flow path of the traditional ventilation and temperature control system that is close to one-way ventilation and smooth temperature control; the present invention has the advantages of low energy consumption, high operating efficiency, small ventilation volume, good air quality, small odor emission, low operating cost, etc., and realizes the purpose of low energy consumption and efficient environmental control of the pig house; when in use, by turning the knob, the bolt will be driven into the threaded barrel, and the turntable will be driven to rotate in the disc shell, and then the blackbody radiation refrigeration plate will be installed and fixed, which is convenient for assembling the refrigeration fence, and the fence area can be adjusted according to the number of pigs, and then the threaded rod can be driven to rotate inside the bracket by turning the swivel, so that the height of the bracket can be adjusted conveniently, and the height of the outer frame can be adjusted according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment; Figure 2 The cross-sectional schematic diagram of the pig house in the embodiment; Figure 3 This is a schematic diagram of the air supply pipe structure of an embodiment; Figure 4 This is a schematic diagram of the structure of the radiation cooling baffle system of the embodiment; Figure 5 This is a schematic diagram of the installation of the refrigeration guardrail structure of the embodiment; Figure 6 It is a schematic diagram of the rotation structure of the embodiment; Figure 7 The figure is a cross-sectional schematic diagram of the rotary joint structure of the embodiment. In the figure: 1, pig house; 2, air conditioner; 3, wet film evaporator; 4, air supply pipe; 5, radiation cooling baffle system; 6, exhaust duct; 7, exhaust fan; 41, air inlet; 42, exhaust hole; 51, bracket; 52, black body radiation cooling plate; 53, outer frame; 54, base; 55, threaded rod; 56, rotating ring; 57, threaded cylinder; 58, rotary joint assembly; 581, disc shell; 582, knob; 583, bolt; 584, turntable; 585, ring groove; 586, ball bearing. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0019] See also Figure 1-2A pig farm environmental control device based on radiation heat transfer includes a pig house 1, an air conditioner 2 is installed outside the pig house 1, and a refrigeration system is arranged inside the air conditioner 2. The refrigeration system adopts a mechanical energy scroll compressor for refrigeration and is integrated and installed in the air conditioner 2. It has two core capabilities of cold water treatment and air treatment; and the internal layout is compact and efficient, the footprint is small, and the energy efficiency ratio EER>4.5. A wet film evaporator 3 is arranged on the top of the air conditioner 2, and an air supply pipe 4 is connected to the exhaust port of the wet film evaporator 3. The air supply pipe 4 is suspended on the top of the inner cavity of the pig house 1. Several radiation refrigeration fence systems 5 are arranged inside the pig house 1, and are symmetrically arranged in two rows in the pig house 1. A sidewalk is arranged between the two rows of radiation refrigeration fence systems 5. The pig house 1 is located under the ground of the radiation refrigeration fence system 5. An exhaust duct 6 (essentially an exhaust duct under the manure slatted plate) is arranged, and an exhaust fan 7 for exhausting air is arranged in the exhaust duct 6.

[0020] In this embodiment, the air-conditioning integrated machine 2 has the function of controlling humidity and adjusting temperature of the pig house 1 through the refrigeration system set inside. Humidity control: In order to ensure that the indoor humidity is below 80%, especially under high temperature and high humidity climate conditions, if the dehumidification by rotary dehumidification, compression dehumidification, chemical dehumidification, membrane dehumidification and other methods are used, the equipment will be large in size and difficult to maintain. Therefore, this system uses cooling dehumidification, that is, the humid and hot fresh air is first cooled to below the dew point through the fresh air air conditioner and then sent to the room; Temperature control: It can be automatically adjusted according to the heat load demand.

[0021] In this embodiment, three scroll compressors are used to perform graded pretreatment on fresh air to ensure that the supply air temperature is between 18-28°C, and through air convection, a comfortable breathing temperature and indoor thermal balance are quickly achieved.

[0022] In this embodiment, the radiation heat exchange system is mainly composed of a compressor, a cooling pump, a freezing pump and pipelines, and a radiation refrigeration fence. In essence, the system supplies circulating liquid to the inner cavity of the blackbody radiation refrigeration plate 52, and controls the temperature of the radiated air flow by controlling the temperature of the liquid, thereby achieving temperature control of the pig living area. This solution can control about 50% of the heat, can significantly reduce operating energy consumption, and is more effective than traditional negative pressure water curtains.

[0023] According to actual measurements: when the outdoor temperature is 41℃, the indoor supply air temperature can be adjusted within the range of 18-30℃, the chilled water temperature can be adjusted within the range of 16-25℃, and the cooling water temperature difference and superheat degree all meet the temperature control design requirements; the indoor humidity can be adjusted according to indoor needs, and humidification or dehumidification is automatically controlled by the electronic control system.

[0024] In this embodiment, please refer to Figure 1-3, and also includes a ventilation system. The ventilation system adopts an airflow organization form of upper delivery and lower exhaust. The air supply pipe 4 is connected to the exhaust fan. The air supply pipe 4 is "U"-shaped and adopts PP hollow board, which has the characteristics of low price, small deformation, clean and hygienic. The air flow path in the pig living area and its vicinity is similar to a "Z"-shaped structure (the outlet area of ​​the air supply pipe 4 is defined as the first horizontal airflow section, the pig living area and the set height area in the upper and lower directions are defined as the vertical section, and the exhaust area is defined as the second horizontal airflow section). The temperature control airflow generated by the black body radiation refrigeration plate 52 moves from the circumferential direction of the pig living area to the inside thereof, and presents a trend of squeezing the airflow sent out by the air supply pipe 4. As one of the core technical points of the present invention, this scheme not only achieves a temperature control effect similar to that of the Laval flow field, but also can achieve temperature control and ventilation more efficiently and smoothly, which is essentially different from the air flow path in the traditional ventilation and temperature control system that is close to one-way ventilation and smooth temperature control.

[0025] Among them, one end of the air supply pipe 4 has an air inlet 41, and exhaust holes 42 are opened on both sides of the air supply pipe 4. Air is transported into the house through the air supply pipe 4. With the cooperation of the exhaust fan 7, the air will be blown toward the pigs in a parabolic form along the exhaust holes 42 opened on the outside of the air supply pipe 4, and discharged through the exhaust duct 6, forming a "Z"-shaped flow path, which significantly improves the air circulation rate in the pig farm room.

[0026] In the same effective pig house area, under the extreme conditions of 42℃ outdoors and indoor temperature and humidity below 27℃ and 80%, the total power consumption of the pig house in this example is only 48kw / h under full load. This power consumption is only generated during the relatively hottest hours, and the indoor temperature after regulation is 4-5℃ lower than the negative pressure water curtain mode, and the humidity after regulation is more than 20% lower than the negative pressure water curtain mode. The temperature distribution inside the pig house is uniform, while the temperature difference between the air inlet and outlet of the traditional water curtain fan pig house is large, and the greater the length, the greater the temperature difference.

[0027] According to on-site measurements, the indoor wind speed requirement of less than 0.6m / s at the pig's back is met, the plane wind distribution uniformity requirement is met within 15%, and the air volume meets the design requirement of 12000-17000m³ / h; the indoor positive and negative pressures are adjustable.

[0028] See also Figure 4-5The radiation cooling baffle system 5 is mainly composed of cooling baffles, cooling water, chilled water, pump valve pipelines, control systems, etc. A bracket 51 for installation and positioning is provided between each two adjacent cooling baffles. The cooling baffles are black body radiation cooling panels 52, and an outer frame 53 is installed on the outer side of the black body radiation cooling panel 52. The black body radiation cooling panel 52 surrounds the pigs. The surface temperature of the piglets at about 39°C will exchange heat with the low-temperature radiation cooling baffles through the radiation of electromagnetic waves and infrared rays, so that the temperature of the pig's respiratory zone is 1-2°C lower than the temperature of the upper space, which can effectively save energy and avoid cold stress and heat stress caused by traditional floor heating systems. It can also replace the pens to reduce its construction cost. According to actual measurements, when 76 cooling panels are selected, the temperature difference of each panel changes within the range of 1-3°C without load, which meets the energy-saving requirements.

[0029] See also Figure 4-5 A base 54 is provided at the bottom side of the bracket 51, a threaded rod 55 is screwed inside the bracket 51, the bottom end of the threaded rod 55 is rotatably connected to the top of the base 54, a swivel 56 is fixedly installed on the top of the threaded rod 55, and threaded cylinders 57 are fixedly installed around the upper and lower ends of the bracket 51. A screw-on assembly 58 for connection and positioning is provided between the blackbody radiation refrigeration plate 52 and the threaded cylinder 57. The blackbody radiation refrigeration plate 52 is conveniently installed through the screw-on assembly 58, and then the threaded rod 55 is driven to rotate inside the bracket 51 by twisting the swivel 56, so that the height of the bracket 51 can be adjusted, thereby facilitating the adjustment of the height of the outer frame 53.

[0030] See also Figure 6-7 The screw-on assembly 58 includes a disk shell 581 fixedly mounted on the side wall of the blackbody radiation cooling plate 52, a knob 582 is rotatably connected to the disk shell 581 away from the blackbody radiation cooling plate 52, a bolt 583 is fixedly mounted on the side of the knob 582 away from the knob 582, and the bolt 583 is screwed into the threaded tube 57, a turntable 584 is fixedly mounted on the side of the knob 582 close to the disk shell 581, and the turntable 584 is rotatably connected to the inside of the disk shell 581, and the turntable 584 is rotatably connected to the inside of the disk shell 581. Annular grooves 585 are provided on both sides of the disc shell 581, and balls 586 are embedded in the corresponding annular grooves 585 inside the disc shell 581, and the balls 586 are rollingly connected in the annular grooves 585. By turning the knob 582, the bolt 583 will be driven to screw into the threaded tube 57, and the turntable 584 will be driven to rotate in the disc shell 581, and then the blackbody radiation refrigeration plate 52 will be installed and fixed, so as to facilitate the assembly of the refrigeration fence, and the fence area can be adjusted according to the number of pigs.

[0031] During the implementation process, a heat recovery system and a deodorization system are also included. The heat recovery system is composed of an air-water stainless steel heat exchanger, cooling water pipelines, pumps and valves, and a condensed water recovery system. The purpose is to recycle the cold air and cooling water system discharged from the sty, and at the same time, the low-temperature condensed water is recovered through the pipeline system. Its advantage is that after combining with the deodorization water system, the cooling temperature of the entire system is stable, the water evaporation is small, and it does not occupy the effective use area. The cost is only 1 / 2 of the cooling tower deodorization tower. According to actual measurements, the deodorization and cooling water evaporation consumes no more than 4 tons of water when operating continuously at full load under an outdoor high temperature of 41°C. The temperature difference of the cooling water in the heat recovery system does not exceed 10°C. Meet the requirements of energy-saving use; the deodorization system uses water spraying to wash and deodorize odor substances such as ammonia. It is composed of stainless steel spray plates, sedimentation tanks, water pumps, water supply pipes, water distributors, etc. In the design, the air quality and odor emissions are fully considered. The odor treatment cost and impact can only be minimized when the exhaust volume is reduced. Therefore, the exhaust volume of the entire pen is about 15,000 m³ / h, which is far from the traditional negative pressure treatment volume of 120,000 cubic meters. Therefore, in actual operation, because of the suitable temperature and humidity indoors, pigs do not need to drink a lot of water to remove body heat, which has saved the water consumption of piglets in summer, and the construction cost can also be reduced accordingly.

Claims

1. A pig farm environmental control device based on radiation heat transfer, comprising a pig house (1), characterized in that: An air conditioning integrated unit (2) is installed outside the pig house (1), a wet film evaporator (3) is arranged on the top of the air conditioning integrated unit (2), an air supply pipe (4) is connected to the exhaust port of the wet film evaporator (3), and the air supply pipe (4) is suspended from the top of the pig house (1). A plurality of radiation temperature control fence systems (5) are arranged inside the pig house (1), and are symmetrically arranged in two rows inside the pig house (1), and a sidewalk is arranged between the two rows of radiation temperature control fence systems (5). An exhaust duct (6) is arranged under the ground of the radiation temperature control fence system (5) in the pig house (1), and an exhaust fan (7) for extracting exhaust air is arranged in the exhaust duct (6).

2. The pig farm environment control device based on radiation heat transfer according to claim 1 is characterized in that: The air-conditioning integrated machine (2) is provided with a refrigeration system, the refrigeration system adopts a mechanical energy scroll compressor for refrigeration, and is integrated and installed in the air-conditioning integrated machine (2).

3. The pig farm environment control device based on radiation heat transfer according to claim 1 is characterized in that: The integrated air conditioner (2) is used to control humidity and adjust temperature in the pig house (1) through a refrigeration system arranged inside.

4. The pig farm environment control device based on radiation heat transfer according to claim 1 is characterized in that: It also includes a ventilation system, which adopts an upward-sending and downward-exhausting air flow circulation method, and the air flow circulation path is a "Z"-shaped structure in the pig living area and its vicinity.

5. The pig farm environment control device based on radiation heat transfer according to claim 1 is characterized in that: The air supply pipe (4) is in a "U" shape and is made of a PP hollow plate. One end of the air supply pipe (4) is provided with an air inlet (41), and both sides of the air supply pipe (4) are provided with exhaust holes (42).

6. The pig farm environment control device based on radiation heat transfer according to any one of claims 1 to 5, characterized in that: It also includes a heat recovery system and a deodorization system.

7. The pig farm environment control device based on radiation heat transfer according to claim 6 is characterized in that: The radiation temperature control baffle system (5) comprises a refrigeration baffle, cooling water, chilled water, pump valve pipelines, and a control system.

8. The pig farm environment control device based on radiation heat transfer according to claim 7 is characterized in that: A bracket (51) for mounting and positioning is provided between each two adjacent refrigeration panels, the refrigeration panels are black body radiation temperature control panels (52), an outer frame (53) is installed on the outer side of the black body radiation temperature control panels (52), and the black body radiation temperature control panels (52) are surrounded by the four sides of the pig living area.

9. The pig farm environment control device based on radiation heat transfer according to claim 8 is characterized in that: A base (54) is provided at the bottom side of the bracket (51), a threaded rod (55) is screwed inside the bracket (51), the bottom end of the threaded rod (55) is rotatably connected to the top of the base (54), a swivel (56) is fixedly installed on the top of the threaded rod (55), threaded cylinders (57) are fixedly installed around the upper and lower ends of the bracket (51), and a screw-on assembly (58) for connection and positioning is provided between the blackbody radiation temperature control plate (52) and the threaded cylinder (57).

10. The pig farm environment control device based on radiation heat transfer according to claim 9, wherein the rotary joint component (58) comprises a disc shell (581) fixedly mounted on the side wall of the blackbody radiation temperature control plate (52), a knob (582) is rotatably connected to the side of the disc shell (581) away from the blackbody radiation temperature control plate (52), a bolt (583) is fixedly mounted on the side of the knob (582) away from the knob (582), and the bolt (583) is rotary connected to the side of the disc shell (581) away from the blackbody radiation temperature control plate (52). Inside the threaded cylinder (57), a rotating disk (584) is fixedly mounted on one side of the knob (582) close to the disc shell (581), and the rotating disk (584) is rotatably connected to the inside of the disc shell (581). Annular grooves (585) are provided on both sides of the rotating disk (584), and balls (586) are embedded in the inside of the disc shell (581) corresponding to the annular grooves (585), and the balls (586) are rollingly connected in the annular grooves (585).

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