Filtering device and fresh air system

Abstract

The present application relates to temperature control equipment technical field, specifically to a kind of filtering device and fresh air system, including temperature control host, water tank, delivery pump and fresh air pipeline, the input end of fresh air pipeline is provided with filter, temperature control zone is provided in filter, temperature control zone is provided with temperature increasing cavity and temperature decreasing cavity, temperature control zone inserts several vertical gravity heat pipes, heating cavity for heating gravity heat pipe is arranged at the bottom of filter;Two ends of temperature control zone are rotatably installed with rotary pipeline, and an inclined connecting air passage is arranged in the rotary pipeline, the technical scheme is preliminary temperature control before air enters temperature control host by temperature control zone in filter cooperating with gravity heat pipe, temperature is reduced in advance in summer, temperature is increased in advance in winter, and the time for temperature control host to make external air reach set temperature is reduced.

Description

Technical Field

[0001] This invention relates to the field of temperature control equipment technology, specifically to a filtration device and a fresh air system. Background Technology

[0002] In livestock and poultry farming, the environment and temperature inside the sheds play a crucial role. Existing farms typically utilize fresh air systems in conjunction with temperature control units to simultaneously ventilate and regulate the temperature of the farming environment. Air-source heat pumps can cool water, which is then precisely delivered to the pens through ductwork via a fresh air intake unit to achieve cooling. Conversely, air-source heat pumps can generate hot water, which is then precisely delivered to the pens through ductwork via a fresh air intake unit to provide heating.

[0003] However, in actual use, when the temperature is too high in summer or too low in winter, the temperature control unit needs a long time to allow the outside air to reach the set temperature after starting up, or a high-power compressor needs to be started to improve the cooling and heating effect. In addition, the humidity content in the air is high in summer, and the air with a lot of moisture entering the temperature control unit will produce a lot of condensation, which will affect the internal pipes. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the present invention aims to provide a filtration device, including a filter. The filter contains a temperature-regulating zone, which includes a heating chamber and a cooling chamber. The heating chamber is located above the cooling chamber. The temperature-regulating zone is fitted with several vertical gravity heat pipes, each comprising an evaporation section located in the cooling chamber and a condensation section located in the heating chamber. The filter has a heating chamber at the bottom of the gravity heat pipes for heating them. Rotary pipes are rotatably mounted at both ends of the temperature-regulating zone. Inclined connecting air passages are provided within the rotating pipes. Rotation of the rotating pipes selectively connects the heating chamber and the cooling chamber. A dehumidifier is installed within the rotating pipe at the air inlet end of the temperature-regulating zone. The end of the rotating pipe furthest from the temperature-regulating zone is rotatably connected to an air passage, which contains several primary filter plates and high-efficiency filter plates.

[0005] Preferably, the bottom of the evaporation section of the gravity heat pipe is inserted into the heating cavity at the bottom of the temperature control zone, and the heating cavity is provided with a temperature control medium.

[0006] Preferably, a heat insulation cavity is provided between the heating cavity and the cooling cavity, and the heat insulation section in the middle of the gravity heat pipe is located in the heat insulation cavity, which is filled with a heat insulation layer.

[0007] Preferably, several horizontally extending baffles are respectively provided on both sides of the heating chamber and cooling chamber near the rotating pipe, and gravity heat pipes are inserted on the horizontal baffles, so that the horizontal baffles form a rotating channel in the heating chamber and cooling chamber.

[0008] Preferably, the rotating channels in the heating chamber and cooling chamber are respectively provided with air inlets and air outlets at both ends. An extension tube is connected to the air inlet. The input end of the extension tube is on the same straight line as the axis of the air outlet and is symmetrical about the axis of the rotating pipe. The air outlet and the input end of the extension tube are connected to a bonding plate on the same axis as the rotating pipe. The rotating pipe is rotatably mounted on the bonding plate. The end of the connecting air passage near the temperature control zone is bonded to the bonding plate, and the straight-line distance between the end of the connecting air passage near the bonding plate and the axis of the rotating pipe is equal to the straight-line distance between the air inlet and the air outlet and the axis of the rotating pipe.

[0009] Preferably, the rotating pipe is provided with a support frame for supporting the rotating pipe, and a handle extending radially along the outer periphery of the rotating pipe is provided. Positioning blocks for supporting the handle are provided on both sides of the support frame, and the positioning blocks limit the rotation angle of the rotating pipe to 180 degrees.

[0010] Preferably, a sliding groove is provided inside the rotating pipe, extending radially along the rotating pipe. The sliding groove is intersected with the connecting air passage. The dehumidifier includes a shell with the same cross-sectional shape and size as the sliding groove. The shell is filled with water-absorbing particles, and the shell is provided with air holes that penetrate the dehumidifier along the axis of the rotating pipe.

[0011] Preferably, the length of the housing is greater than the diameter at the intersection of the connecting air passage and the sliding groove.

[0012] Preferably, the end of the sliding groove away from the connecting air passage is sealed by a sealing block, and the straight-line distance between the intersection of the connecting air passage and the sliding groove and the sealing block is greater than the length of the housing; a sealing plate is provided at the end of the housing facing the connecting air passage, and the periphery of the sealing plate is in contact with the inner wall of the sliding groove. A fresh air system includes a temperature control unit, a water tank, and a filtration device as described in any one of the preceding items. The water tank is used to supply water to the temperature control unit, and the temperature control unit is connected to the heating chamber through an insulated hot water pipe.

[0013] Firstly, in this invention, the temperature-regulating zone in the filter, in conjunction with the gravity heat pipe and the heating chamber, pre-regulates the temperature before the air enters the temperature control unit, cooling down in advance in summer and heating up in advance in winter, reducing the time it takes for the temperature control unit to bring the outside air to the set temperature, eliminating the need to start the compressor with high power, and reducing energy consumption.

[0014] Secondly, the design of the rotating pipe and connecting air passage with the air inlet, air outlet, extension pipe and fitting plate in this invention allows the operator to switch between heating and cooling modes by rotating the rotating pipe 180 degrees, so that air can accurately enter the corresponding heating or cooling chamber, reducing the difficulty of operation.

[0015] Thirdly, the dehumidifier in this invention is slidably installed in a sliding groove within a rotating pipe. By adjusting the rotation angle of the rotating pipe, the dehumidifier automatically slides into the connecting air duct during summer to dehumidify the high-humidity air first, preventing condensation from affecting the internal pipes and extending the equipment's lifespan. In winter, the dehumidifier naturally slides to the bottom of the sliding groove under gravity, avoiding additional resistance to airflow caused by the dehumidifier in winter, reducing fan energy consumption, and extending the effective lifespan of the water-absorbing particles, thus achieving overall energy saving and consumption reduction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a 3D view of the filtration device in winter (the arrows in the figure indicate the airflow direction).

[0018] Figure 2 This is a three-dimensional sectional view of the filtration device in winter (the arrows in the figure indicate the airflow direction).

[0019] Figure 3 This is an exploded view of the filtration device's three-dimensional structure.

[0020] Figure 4 for Figure 3 A magnified view of part A.

[0021] Figure 5 This is a top view of the filtration system in summer conditions.

[0022] Figure 6 for Figure 5 Sectional view of section BB.

[0023] Figure 7 for Figure 6 A magnified view of a portion of point C.

[0024] Figure 8 This is a 3D view of the filtration device in summer conditions.

[0025] Explanation of reference numerals in the attached diagram: 2. Filter; 2a. Temperature control zone; 2a1. Heating chamber; 2a2. Cooling chamber; 2a3. Heating chamber; 2a4. Insulation chamber; 2a5. Horizontal partition; 2a6. Air inlet; 2a7. Air outlet; 2a8. Extension tube; 2a9. Adhesive plate; 2b. Gravity heat pipe; 2b1. Evaporation section; 2b2. Condensation section; 2b3. Insulation section; 2c. Rotating pipe; 2c1. Connecting air passage; 2c2. Support frame; 2c3. Handle; 2c4. Positioning block; 2c5. Sliding groove; 2c6. Sealing block; 2d. Dehumidifier; 2d1. Shell; 2d2. Water-absorbing particles; 2d4. Sealing plate; 2d5. Counterweight; 2e. Air passage; 2e1. Primary filter plate; 2e2. High-efficiency filter plate; 3. Telescopic canopy; 31. Three-proof net. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Reference Figures 1 to 8 As shown, this embodiment discloses a filtration device, including a filter 2. The filter 2 has a temperature-regulating zone 2a, which contains a heating chamber 2a1 and a cooling chamber 2a2. The heating chamber 2a1 is located above the cooling chamber 2a2. Several vertical gravity heat pipes 2b are inserted into the temperature-regulating zone 2a. Each gravity heat pipe 2b includes an evaporation section 2b1 located in the cooling chamber 2a2 and a condensation section 2b2 located in the heating chamber 2a1. The filter 2 has a heating element at the bottom of the gravity heat pipes 2b for heating them. Heating chamber 2a3; Rotating pipes 2c are rotatably installed at both ends of temperature control zone 2a. An inclined connecting air passage 2c1 is provided inside the rotating pipe 2c. Rotating the rotating pipe 2c causes the connecting air passage 2c1 to selectively connect the heating chamber 2a1 and the cooling chamber 2a2. A dehumidifier 2d is provided inside the rotating pipe 2c located at the air inlet end of temperature control zone 2a. The end of the rotating pipe 2c away from temperature control zone 2a is rotatably connected to the air passage 2e. Several primary filter plates 2e1 and high-efficiency filter plates 2e2 are installed inside the air passage 2e.

[0028] Within the air passage 2e, the primary filter 2e1 and the high-efficiency filter 2e2 first remove dust and purify the air. In this embodiment, the primary filter 2e1 and the high-efficiency filter 2e2 are located on both sides of the temperature control zone 2a. The number and position of the primary filter 2e1 and the high-efficiency filter 2e2 can be freely set as needed. A three-proof net 31 is fixedly installed at the air inlet end of the air passage 2e, and a retractable canopy 3 is rotatably installed to prevent extreme weather. A fan is fixedly installed at the air outlet end of the air passage 2e. After preliminary filtration, the air enters the temperature control zone 2a through the connecting air passage 2c1 of the rotating pipe 2c. When the equipment is started, the heating chamber 2a3 at the bottom of the gravity heat pipe 2b starts heating the evaporation section 2b1, causing the working fluid in the gravity heat pipe 2b to evaporate in the evaporation section 2b1. During evaporation, the working fluid absorbs heat from the cooling chamber 2a2, thereby cooling the gas in the cooling chamber 2a2. The vapor moves to the condensation section 2b2, where it liquefies upon encountering cold and releases heat, thus releasing heat into the heating chamber 2a1 and mixing with the air entering the heating chamber 2a1, increasing the temperature of the air in the heating chamber 2a1.

[0029] like Figure 1 , Figure 2 As shown: In winter, the staff adjusts the rotating pipe 2c to connect the connecting air duct 2c1 to the heating chamber 2a1. Cold air enters the heating chamber 2a1 and mixes with the heat released by the condenser section 2b2 to preheat it. The temperature-controlled air then enters the temperature control unit. The temperature control unit has higher cooling efficiency in summer and higher heating efficiency in winter. Finally, it is precisely delivered to each breeding pen by the fresh air duct 1c to achieve efficient heating and cooling of the livestock and poultry breeding house.

[0030] like Figures 6 to 7 As shown: In summer, the staff adjusts the rotating pipe 2c to make the connecting air passage 2c1 inside the rotating pipe 2c rotate and connect to the cooling chamber 2a2. The dehumidifier 2d in the rotating pipe 2c at the air inlet first dehumidifies the high humidity air. Then the air enters the cooling chamber 2a2 and comes into contact with the evaporation section 2b1 of the gravity heat pipe 2b, pre-cooling the air that enters the temperature control host for cooling.

[0031] This embodiment also discloses a fresh air system, including a temperature control host and any of the aforementioned filter devices, wherein the temperature control host is used to adjust the water temperature in the heating chamber 2a3.

[0032] In this embodiment, the fresh air duct 1c can have a connecting duct that connects to the air outlet of the temperature control unit, and then the air is distributed to several fabric ducts for input into the livestock and poultry breeding shed. In this embodiment, the temperature adjustment zone 2a in the filter 2, together with the gravity heat pipe 2b and the heating chamber 2a3, performs preliminary temperature adjustment before the air enters the temperature control unit, cooling down in advance in summer and heating up in advance in winter, reducing the time it takes for the temperature control unit to reach the set temperature of the outside air, eliminating the need to start the compressor with high power, and reducing energy consumption. In summer, the dehumidifier 2d first dehumidifies the high humidity air, and the gravity heat pipe 2b also causes some moisture to condense and be discharged during the cooling process, reducing the amount of moisture entering the temperature control unit, reducing the amount of condensate production, avoiding the impact of condensate on the internal pipes, and extending the service life of the equipment.

[0033] In order to automatically heat the bottom end of the gravity heat pipe 2b during equipment use, the following features are specifically designed: The bottom of the evaporation section 2b1 of the gravity heat pipe 2b is inserted into the heating chamber 2a3 at the bottom of the temperature control zone 2a, and the temperature control host is equipped with insulated hot water pipes that connect to both ends of the heating chamber 2a3.

[0034] In this embodiment, when the temperature control unit is running, whether in heating or cooling mode, the hot water it generates is circulated into the heating chamber 2a3 through insulated hot water pipes connecting both ends of the heating chamber 2a3. The bottom of the evaporation section 2b1 of the gravity heat pipe 2b is inserted into the heating chamber 2a3, and the hot water in the heating chamber 2a3 continuously heats the evaporation section 2b1. This embodiment utilizes the hot water generated by the temperature control unit to heat the heating chamber 2a3 through insulated hot water pipes, enabling the gravity heat pipe 2b to operate quickly without the need for an additional independent heating device. This achieves secondary energy utilization, reduces the overall system energy consumption, and lowers operating costs.

[0035] Since the bottom of the gravity heat pipe 2b is heated, the heat absorption of the evaporation section 2b1 and the heat release of the condensation section 2b2 occur simultaneously. To avoid temperature fluctuations between the heating chamber 2a1 and the cooling chamber 2a2, the following features are specifically designed: A heat insulation cavity 2a4 is provided between the heating cavity 2a1 and the cooling cavity 2a2. The heat insulation section 2b3 in the middle of the gravity heat pipe 2b is located in the heat insulation cavity 2a4, and the heat insulation cavity 2a4 is filled with a heat insulation layer.

[0036] In this embodiment, under the heating of the heating chamber 2a3, the working fluid in the evaporation section 2b1 absorbs heat from the heating chamber 2a3 and the cooling chamber 2a2 and evaporates to form steam. The steam rises to the condensation section 2b2 for condensation, releasing heat into the heating chamber 2a1. Since the insulating section 2b3 in the middle of the gravity heat pipe 2b is located in the insulation chamber 2a4, and the insulation chamber 2a4 is filled with an insulation layer, it prevents the heat from the heating chamber 2a1 from being transferred to the cooling chamber 2a2. The cooperation between the insulation chamber 2a4 and the insulating section 2b3 of the gravity heat pipe 2b effectively prevents heat conduction between the heating chamber 2a1 and the cooling chamber 2a2, avoiding mutual temperature influence between the two chambers, ensuring the normal operation of the gravity heat pipe 2b, and improving the accuracy and effectiveness of the temperature control of the entire system.

[0037] To ensure that air can fully contact the gravity heat pipe 2b when entering the heating chamber 2a1 and the cooling chamber 2a2, the following features are specifically designed: Several horizontally extending baffles 2a5 are respectively provided on both sides of the heating chamber 2a1 and the cooling chamber 2a2 near the rotating pipe 2c. Gravity heat pipe 2b is inserted into the horizontal baffles 2a5, and the horizontal baffles 2a5 form a rotating channel in the heating chamber 2a1 and the cooling chamber 2a2.

[0038] In this embodiment, external air enters the filter 2 through the fresh air duct, and is purified by passing through the primary filter plate 2e1 and the high-efficiency filter plate 2e2 in the air passage 2e for dust removal. It then enters the heating chamber 2a1 or cooling chamber 2a2 through the rotating pipe 2c. Because horizontal baffles 2a5 are installed on both sides of the heating chamber 2a1 or cooling chamber 2a2 near the rotating pipe 2c, the air cannot pass directly through the chamber. Instead, it flows along the rotating passage under the guidance of the horizontal baffles 2a5. During this process, the air comes into full contact with the gravity heat pipe 2b inserted on the horizontal baffles 2a5. In this embodiment, the horizontal baffles 2a5 create a rotating passage within the heating chamber 2a1 and cooling chamber 2a2, extending the air's flow path and residence time within the chamber. The increased contact time and larger contact area between the air and the gravity heat pipe 2b allow the air to absorb or release heat more fully, significantly improving heat exchange efficiency and enabling the air to achieve a more ideal pre-temperature control effect before entering the temperature control unit.

[0039] To ensure that the rotation of the rotating pipe 2c can guide air precisely into the heating chamber 2a1 or the cooling chamber 2a2, the following features are specifically designed: The rotating channels in the heating chamber 2a1 and cooling chamber 2a2 are respectively provided with an air inlet 2a6 and an air outlet 2a7 at both ends. An extension tube 2a8 is connected to the air inlet 2a6. The input end of the extension tube 2a8 is on the same straight line as the axis of the air outlet 2a7 and is symmetrical about the axis of the rotating pipe 2c. The air outlet 2a7 and the input end of the extension tube 2a8 are connected to the bonding plate 2a9, which is on the same axis as the rotating pipe 2c. The rotating pipe 2c is rotatably installed on the bonding plate 2a9. The end of the connecting air passage 2c1 near the temperature control zone 2a is bonded to the bonding plate 2a9, and the straight distance between the end of the connecting air passage 2c1 near the bonding plate 2a9 and the axis of the rotating pipe 2c is equal to the straight distance between the air inlet 2a6 and the air outlet 2a7 and the axis of the rotating pipe 2c.

[0040] In this embodiment, the rotating pipe 2c is rotatably mounted on the mating discs 2a9 on both sides of the temperature-regulating zone 2a. The mating discs 2a9 connect the air outlets 2a7 at both ends of the rotating channel within the heating chamber 2a1 and the cooling chamber 2a2, as well as the input end of the extension pipe 2a8. During summer, the rotation of the rotating pipe 2c causes the end of the connecting air passage 2c1 near the temperature-regulating zone 2a to precisely align with the extension pipe 2a8 at the air outlet 2a7 and air inlet 2a6 of the cooling chamber 2a2. Therefore, air can precisely enter the rotating channel of the cooling chamber 2a2 along the connecting air passage 2c1, through the air outlets 2a7 and the extension pipe 2a8, and exchange heat with the condenser section 2b2 of the gravity heat pipe 2b to achieve cooling. Since the extension tube 2a8 can make the axes of the air inlet 2a6 at the input end of the rotary channel and the air outlet 2a7 at the output end of the rotary channel on the same straight line, the straight distance between the end of the connecting air passage 2c1 near the fitting plate 2a9 and the axis of the rotating pipe 2c is equal to the straight distance between the air inlet 2a6 and the air outlet 2a7 and the axis of the rotating pipe 2c.

[0041] Therefore, in winter, operators only need to rotate the rotating pipe 2c 180 degrees, aligning the connecting air passage 2c1 with the extension pipe 2a8 at the air outlet 2a7 and air inlet 2a6 of the heating chamber 2a1. Air enters the rotating channel of the heating chamber 2a1 through the connecting air passage 2c1 and contacts the evaporation section 2b1 of the gravity heat pipe 2b to complete the heating. After being heated or cooled, the air is directly input to the temperature control unit through the air outlet 2a7, ensuring the heating or cooling effect. This embodiment, through the dimensional matching and positional design of the rotating pipe 2c and the connecting air passage 2c1 with the air inlet 2a6, air outlet 2a7, extension pipe 2a8, and fitting plate 2a9, ensures that when the rotating pipe 2c is rotated 180 degrees, air can accurately enter the corresponding heating chamber 2a1 or cooling chamber 2a2, reducing the difficulty of operation.

[0042] To ensure the accuracy of rotating the pipe 2c by 180 degrees, a support frame 2c2 is provided on the outside of the rotating pipe 2c to support the rotating pipe 2c. A handle 2c3 is provided on the outer periphery of the rotating pipe 2c, extending radially along the rotating pipe 2c. Positioning blocks 2c4 are provided on both sides of the support frame 2c2 to support the handle 2c3. The positioning blocks 2c4 limit the rotation angle of the rotating pipe 2c to 180 degrees.

[0043] In this embodiment, the support frame 2c2 outside the rotating pipe 2c provides stable support, ensuring the stability of the rotating pipe 2c during rotation. When it is necessary to switch the working mode, the operator applies a rotational torque to the rotating pipe 2c by holding the handle 2c3 that extends radially along the outer circumference of the rotating pipe 2c. During rotation, the positioning blocks 2c4 on both sides of the support frame 2c2 limit the rotation angle. When the rotating pipe 2c rotates to 180 degrees, the handle 2c3 will contact and be blocked by one of the positioning blocks 2c4, preventing further rotation. At this time, the connecting air passage 2c1 precisely switches from being connected to the heating chamber 2a1 or the cooling chamber 2a2 to being connected to the corresponding hole of the other chamber, ensuring that air can accurately enter the corresponding temperature-regulating chamber, thus completing the system mode switch.

[0044] In order to achieve the purpose of dehumidifying the air entering the temperature control zone 2a only in summer, a sliding groove 2c5 extending radially along the rotating pipe 2c is provided inside the rotating pipe 2c. The sliding groove 2c5 is intersected with the connecting air passage 2c1. The dehumidifier 2d includes a shell 2d1 with the same cross-sectional shape and size as the sliding groove 2c5. The shell 2d1 is filled with water-absorbing particles 2d2. The shell 2d1 is provided with air holes that penetrate the dehumidifier 2d along the axial direction of the rotating pipe 2c.

[0045] In this embodiment, the sliding groove 2c5 inside the rotating pipe 2c extends radially along the pipe and intersects with the connecting air duct 2c1. The shell 2d1 of the dehumidifier 2d has the same cross-sectional shape and size as the sliding groove 2c5 and can slide within the sliding groove 2c5. In summer, when the operator rotates the rotating pipe 2c to connect the connecting air duct 2c1 to the cooling chamber 2a2 located below, the sliding groove 2c5 is located above the connecting air duct 2c1. Under the action of gravity, the dehumidifier 2d naturally slides to the intersection of the connecting air duct 2c1 and the sliding groove 2c5, and the air vents of the dehumidifier 2d are aligned with the connecting air duct 2c1. At this time, external air enters the rotating pipe 2c after being filtered through the air duct 2e. The air passes through the air vents and through the dehumidifier 2d. The water-absorbing particles 2d2 inside the shell 2d1 adsorb the moisture in the air, thus achieving dehumidification. The dehumidified air then enters the cooling chamber 2a2 through the connecting air duct 2c1 and exchanges heat with the condenser section 2b2 of the gravity heat pipe 2b, completing the cooling process. In winter, when the rotating pipe 2c is rotated to connect the connecting air duct 2c1 to the upper heating chamber 2a1, the sliding groove 2c5 is located below the connecting air duct 2c1. The dehumidifier 2d naturally slides to the bottom of the sliding groove 2c5 under gravity, avoiding additional resistance to airflow caused by the dehumidifier in winter and reducing fan energy consumption. Simultaneously, the water-absorbing particles 2d2 do not participate in operation when not needed, extending their effective service life and reducing replacement costs, thus achieving overall energy saving and consumption reduction.

[0046] To ensure that the air entering the connecting air duct 2c1 can be completely dehumidified by the dehumidifier 2d, the length of the housing 2d1 is preferably greater than the diameter at the intersection of the connecting air duct 2c1 and the sliding groove 2c5.

[0047] In this embodiment, because the length of the housing 2d1 is greater than the diameter of the intersection of the connecting air duct 2c1 and the sliding groove 2c5, the dehumidifier 2d can completely cover the intersection area of ​​the connecting air duct 2c1 and the sliding groove 2c5 when it slides into the connecting air duct 2c1 under the influence of gravity. This ensures that every part of the air entering the connecting air duct 2c1 can fully contact the water-absorbing particles 2d2, achieving the purpose of comprehensive dehumidification.

[0048] To ensure complete release of the connecting air passage 2c1 when the dehumidifier 2d is located in the sliding groove 2c5: the end of the sliding groove 2c5 away from the connecting air passage 2c1 is sealed by a sealing block 2c6; the straight-line distance between the intersection of the connecting air passage 2c1 and the sliding groove 2c5 and the sealing block 2c6 is greater than the length of the housing 2d1; a sealing plate 2d4 is provided at the end of the housing 2d1 facing the connecting air passage 2c1, and the periphery of the sealing plate 2d4 is fitted against the inner wall of the sliding groove 2c5. In winter, when the operator rotates the rotating pipe 2c to connect the connecting air passage 2c1 to the heating chamber 2a1 located above, the sliding groove 2c5 is located below the connecting air passage 2c1. Under the action of gravity, the dehumidifier 2d naturally slides to the bottom of the sliding groove 2c5 and fits against the sealing block 2c6. Since the straight-line distance between the intersection of the connecting air passage 2c1 and the sliding groove 2c5 and the sealing block 2c6 is greater than the length of the shell 2d1, the dehumidifier 2d is completely detached from the connecting air passage 2c1. With the sealing plate 2d4 sealing the sliding groove 2c5, it is ensured that air can directly enter the heating chamber 2a1 through the connecting air passage 2c1 without obstruction.

[0049] To ensure the dehumidifier 2d moves effectively within the sliding groove 2c5 under gravity, a counterweight 2d5 is installed at the end of the housing 2d1 furthest from the connecting air duct 2c1. The counterweight 2d5 utilizes gravity to enable the dehumidifier 2d to slide automatically, facilitating rapid position switching and allowing the system to transition more quickly from dehumidification mode to non-dehumidification mode.

[0050] During operation, outside air first enters the filter 2 at the inlet of the fresh air duct. When the equipment starts, the heating chamber 2a3 at the bottom of the gravity heat pipe 2b activates the heating evaporation section 2b1, causing the working fluid in the gravity heat pipe 2b to evaporate in the evaporation section 2b1. During evaporation, the working fluid absorbs heat from the cooling chamber 2a2, thus cooling the gas in the cooling chamber 2a2. The vapor moves to the condensation section 2b2, where it liquefies upon contact with the cold air, releasing heat and thus releasing heat into the heating chamber 2a1. This heat mixes with the air entering the heating chamber 2a1, raising its temperature. In summer, the operator adjusts the rotating pipe 2c to rotate the connecting air passage 2c1 within it, connecting it to the cooling chamber 2a2. The dehumidifier 2d in the rotating pipe 2c at the inlet first dehumidifies the high-humidity air. Then, the air enters the cooling chamber 2a2 and comes into contact with the evaporation section 2b1 of the gravity heat pipe 2b, pre-cooling the air before it enters the temperature control unit for cooling. In winter, the staff adjusts the rotating pipe 2c to connect the connecting air passage 2c1 to the heating chamber 2a1. Cold air enters the heating chamber 2a1 and mixes with the condenser section 2b2. The cold air and the heat released by the condenser section 2b2 are used for preheating. The temperature-controlled air then enters the temperature control host for heating or cooling.

[0051] In practical applications, this embodiment can be used to form an air source heat pump unit by multiple temperature control hosts, or multiple filters 2 can be configured according to actual needs. Multiple filters 2 constitute a fresh air device, and the air outlet of the fresh air device is led into the interior of the pig house to form multiple sets of indoor air supply pipes.

[0052] This invention can be combined with currently widely used fresh air filter boxes to ensure filtration efficiency while meeting the needs of summer cooling and winter heating. It integrates air filtration, temperature control, precise ventilation, and energy-saving operation, making it suitable for pig houses with high biosecurity and disease prevention requirements and strict temperature control requirements. At the same time, it can solve problems related to air resistance matching, humidity control and mold prevention, and system linkage.

[0053] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. Filtration device, characterized in that The filter (2) includes a temperature control zone (2a) and a heating chamber (2a1) and a cooling chamber (2a2) within the temperature control zone (2a). The heating chamber (2a1) is located above the cooling chamber (2a2). Several vertical gravity heat pipes (2b) are inserted into the temperature control zone (2a). Each gravity heat pipe (2b) includes an evaporation section (2b1) located in the cooling chamber (2a2) and a condensation section (2b2) ​​located in the heating chamber (2a1). The filter (2) has a heating chamber (2a3) at the bottom of the gravity heat pipes (2b) for heating the gravity heat pipes (2b). Rotary pipes (2c) are rotatably installed at both ends of the temperature control zone (2a). An inclined connecting air passage (2c1) is provided inside the rotary pipe (2c). The rotation of the rotary pipe (2c) causes the connecting air passage (2c1) to selectively connect the heating chamber (2a1) and the cooling chamber (2a2). A dehumidifier (2d) is provided inside the rotary pipe (2c) located at the air inlet end of the temperature control zone (2a). The end of the rotary pipe (2c) away from the temperature control zone (2a) is rotatably connected to the air passage (2e). Several primary filter plates (2e1) and high-efficiency filter plates (2e2) are installed inside the air passage (2e). A sliding groove (2c5) extending radially along the rotating pipe (2c) is provided inside the rotating pipe (2c). The sliding groove (2c5) is intersected with the connecting air passage (2c1). The dehumidifier (2d) includes a shell (2d1) with the same cross-sectional shape and size as the sliding groove (2c5). The shell (2d1) is filled with water-absorbing particles (2d2). The shell (2d1) is provided with an air hole that penetrates the dehumidifier (2d) along the axial direction of the rotating pipe (2c). The end of the sliding groove (2c5) away from the connecting air passage (2c1) is blocked by the sealing block (2c6). The straight-line distance between the intersection of the connecting air passage (2c1) and the sliding groove (2c5) and the sealing block (2c6) is greater than the length of the shell (2d1).

2. The filter device of claim 1, wherein, The bottom of the evaporation section (2b1) of the gravity heat pipe (2b) is inserted into the heating chamber (2a3) at the bottom of the temperature control zone (2a), and the heating chamber (2a3) is provided with a temperature control medium.

3. The filter device of claim 1, wherein, A heat insulation cavity (2a4) is provided between the heating cavity (2a1) and the cooling cavity (2a2). The heat insulation section (2b3) in the middle of the gravity heat pipe (2b) is located in the heat insulation cavity (2a4), and the heat insulation cavity (2a4) is filled with a heat insulation layer.

4. The filtration device according to claim 1, characterized in that, Several horizontally extending baffles (2a5) are respectively provided on both sides of the heating chamber (2a1) and cooling chamber (2a2) near the rotating pipe (2c). Gravity heat pipe (2b) is inserted into the horizontal baffles (2a5), and the horizontal baffles (2a5) form a rotating channel in the heating chamber (2a1) and cooling chamber (2a2).

5. The filtration device according to claim 4, characterized in that, The rotating channels in the heating chamber (2a1) and cooling chamber (2a2) are respectively provided with an air inlet (2a6) and an air outlet (2a7) at both ends. An extension tube (2a8) is connected to the air inlet (2a6). The input end of the extension tube (2a8) is on the same straight line as the axis of the air outlet (2a7) and is symmetrical about the axis of the rotating pipe (2c). The input ends of the air outlet (2a7) and the extension tube (2a8) are connected to the rotating pipe (2c). 2c) On the bonding plate (2a9) on the same axis, the rotating pipe (2c) is rotatably installed on the bonding plate (2a9). The end of the connecting air passage (2c1) near the temperature control zone (2a) is bonded to the bonding plate (2a9), and the straight distance between the end of the connecting air passage (2c1) near the bonding plate (2a9) and the axis of the rotating pipe (2c) is equal to the straight distance between the air inlet (2a6) and the air outlet (2a7) and the axis of the rotating pipe (2c).

6. The filtration device according to claim 5, characterized in that, The rotating pipe (2c) is provided with a support frame (2c2) for supporting the rotating pipe (2c). A handle (2c3) extending radially along the outer periphery of the rotating pipe (2c) is provided. Positioning blocks (2c4) for supporting the handle (2c3) are provided on both sides of the support frame (2c2). The positioning blocks (2c4) limit the rotation angle of the rotating pipe (2c) to 180 degrees.

7. The filtration device according to claim 1, characterized in that, The length of the housing (2d1) is greater than the diameter at the intersection of the connecting air passage (2c1) and the sliding groove (2c5).

8. The filtration device according to claim 1, characterized in that, A sealing plate (2d4) is provided at the end of the housing (2d1) facing the connecting air passage (2c1), and the periphery of the sealing plate (2d4) is attached to the inner wall of the sliding groove (2c5).

9. A fresh air system, characterized in that, It includes a temperature control unit and a filtration device as described in any one of claims 1 to 8, wherein the temperature control unit is connected to the heating chamber via an insulated hot water pipe.

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