Air handling unit

Abstract

The invention relates to the technical field of air purification and discloses an air handling unit which comprises an air return unit, a first fan is arranged in an inner cavity of the air return unit, a fresh air unit is fixedly installed on the lower surface of the air return unit, and a second fan is arranged in an inner cavity of the fresh air unit. By means of the filtering assembly, a filtering net can be automatically cleaned when the filter is blocked, dust can be collected in a centralized mode during cleaning, secondary blocking of the collected dust can be reduced, meanwhile, the filter is limited in a flexible fixing mode, and therefore the risk that the filter is damaged due to vibration is reduced, and the service life of the filter is prolonged. The filter can be quickly disassembled and assembled through the flexible fixing mechanism, the filter can be conveniently maintained, and the pressure intensity change in the air handling unit can be timely and accurately observed through the pressure detection unit, so that the air handling unit can be timely maintained when the pressure intensity of the air handling unit is changed.

Description

Technical Field

[0001] The present application relates to the technical field of air purification, and in particular to an air handling unit. Background Art

[0002] With the continuous advancement of modern building technology and people's increasing requirements for indoor environmental comfort, air handling units, as important equipment for indoor environmental regulation, have also made great progress in performance and technical level. However, traditional air handling units still have many shortcomings in terms of function, efficiency, maintenance, energy saving and environmental protection. In the heat exchange function section of traditional air handling units, the filter mechanism is a fixed and immovable part, and it is prone to failure, thus affecting the efficiency of the air handling unit.

[0003] The existing technology still has the following problems: 1. As the filter is used, it will continuously capture dust, particulate matter and other impurities in the air. Over time, these impurities will accumulate on the surface of the filter and gradually form a thick dust layer, which will not only reduce the filtering efficiency of the filter, but also increase the resistance of air passing through the filter, resulting in increased wind resistance of the fan, increased losses in equipment operation, and may even cause the unit to shut down. Traditional filters are difficult to disassemble for maintenance, wasting the working time of the unit.

[0004] 2. The main purpose of air handling unit pressure monitoring is to understand the internal pressure status of the unit in real time, promptly detect and deal with abnormal situations, and ensure the safe, stable and efficient operation of the unit. However, the existing pressure detection mechanism is difficult to observe the internal pressure of the unit in a timely and accurate manner, resulting in the inability to maintain the equipment in a timely manner. Summary of the invention

[0005] In order to overcome the problem that these impurities will accumulate on the surface of the filter over time and gradually form a thick dust layer, which will not only reduce the filtering efficiency of the filter, but also increase the resistance of air passing through the filter, resulting in increased wind resistance of the fan, increased losses in equipment operation, and may even cause the unit to shut down, and traditional filters are difficult to disassemble during maintenance, wasting the working time of the unit, and the pressure detection mechanism is difficult to observe the internal pressure of the unit in a timely and accurate manner. The purpose of the present invention is to provide an air handling unit to solve the above-mentioned shortcomings.

[0006] The present application provides an air handling unit, including a return air unit, wherein a first fan is arranged in an inner cavity of the return air unit, a fresh air unit is fixedly installed on the lower surface of the return air unit, a second fan is arranged in the inner cavity of the fresh air unit, a mixing tank is opened at the junction of the return air unit and the fresh air unit, a filter assembly is arranged in the inner cavity of the fresh air unit, a pressure detection assembly is arranged in the inner cavity of the fresh air unit, a surface cooler is fixedly installed in the inner cavity of the fresh air unit, a duct is sleeved on the outer surface of the surface cooler, the filter assembly comprises a bracket, a filter mesh is fixedly installed on the inner wall of the bracket, a limiting mechanism is arranged on the upper surface of the fresh air unit, an adjustment mechanism is arranged on the upper surface of the fresh air unit, a button is arranged on the outer surface of the bracket, a third threaded rod is rotatably connected to the inner wall of the bracket, a cleaning mechanism is sleeved on the outer surface of the third threaded rod, a dust accumulation mechanism is arranged at the bottom end of the cleaning mechanism, a stepping motor is arranged on the upper surface of the bracket, and a belt is sleeved on the outer surface of the third threaded rod.

[0007] Furthermore, there are three filter components, and the filter mesh is provided with filter holes. The filter holes of the filter meshes in the three filter components decrease successively, and the filter holes of the filter mesh close to the surface cooler are the smallest. The limiting mechanism is located in the middle part of the bottom of the bracket, the adjustment mechanism and the button are fitted, and the adjustment mechanism and the button are arranged on both sides of the bracket. The output end of the stepper motor is connected to the belt sleeve, the button and the stepper motor are electrically connected, and pressing the button controls the stepper motor to work.

[0008] Furthermore, the limiting mechanism includes a first fixed block, which is fixedly connected to the upper surface of the fresh air unit, the inner cavity of the first fixed block is rotatably connected to the first threaded rod, the outer surface of the first threaded rod is slidably connected to the first limiting frame, the outer surface of the first threaded rod is slidably connected to the second limiting frame, the inner wall of the first limiting frame is fixedly installed with the first connecting block, the inner wall of the second limiting frame is fixedly installed with the second connecting block, the first sliding rod is fixedly installed at both ends of the bracket, and the outer surface of the first sliding rod is sleeved with the first spring.

[0009] Furthermore, the first connecting block and the first threaded rod are connected by threads, and the second connecting block and the first threaded rod are connected by threads, and the threads at both ends of the first threaded rod are in opposite directions. When the first threaded rod rotates, the first connecting block and the second connecting block move toward or away from each other, and the first sliding rod is slidably connected to the first limit frame and the second limit frame respectively. First springs are provided at both ends of the bracket, and the first springs at one end are respectively located between the bracket and the first limit frame, and the first springs at the other end are respectively located between the bracket and the second limit frame.

[0010] Furthermore, the adjustment mechanism includes a second fixed block, the second fixed block is fixedly connected to the fresh air unit, the inner cavity of the second fixed block is rotatably connected to the second threaded rod, the outer surface of the second fixed block is slidably connected to the slider, the slider and the second threaded rod are threadedly connected, the outer surface of the slider is fixedly installed with a driving rod, the outer surface of the slider is fixedly installed with a storage rod at four corners of the outer surface of the second fixed block, the inner cavity of the storage rod is slidably connected to the telescopic rod, the end of the telescopic rod away from the storage rod is fixedly installed with an adjusting block, the outer surface of the adjusting block is fixedly installed with a driving block, the outer surface of the driving block is provided with a driving groove, the driving groove is inclined, the driving rod and the driving groove are slidably connected, and the adjusting block and the button fit together.

[0011] Furthermore, the cleaning mechanism includes a support bar, a ring is fixedly installed on the outer surface of the support bar, the ring and the third threaded rod are threadedly connected, the inner cavity of the support bar is slidably connected with a second sliding rod, the outer surface of the second sliding rod is sleeved with a second spring, a cleaning brush is fixedly installed on one end of the second sliding rod, the cleaning brush and the filter mesh are tightly fitted, and the second spring is located between the cleaning brush and the support bar.

[0012] Furthermore, the dust collection mechanism includes a first dust box, an insertion rod is fixedly installed on the outer surface of the first dust box, and the second dust box is sleeved on the outer surface of the insertion rod. The middle part of the inner wall of the first dust box and the second dust box are fixedly installed with a protrusion, and the middle of the protrusion is raised. Both sides of the first dust box and the second dust box are fixedly installed with a baffle plate, and the baffle plate is inclined downward along the direction of the protrusion. The support bar is fixedly connected to the first dust box, and the first dust box and the second dust box are respectively located on both sides of the filter mesh and are slidably connected to the filter mesh.

[0013] Furthermore, the pressure detection assembly includes a pressure cylinder, a connecting hole is opened at one end of the pressure cylinder, the connecting hole is located in the inner cavity of the fresh air unit, a piston is slidably connected to the inner cavity of the pressure cylinder, a third sliding rod is fixedly installed on the outer surface of the piston, a fixing ring is fixedly installed on the inner wall of the pressure cylinder, a third spring is sleeved on the outer surface of the third sliding rod, a connecting ring is fixedly installed on the outer surface of the third sliding rod, a pointer is fixedly installed on the end of the third sliding rod away from the piston, and a scale is fixedly installed on the end of the pressure cylinder away from the pressure cylinder.

[0014] Furthermore, the third spring is located between the connecting ring and the fixing ring, and the two ends of the third spring are fixedly connected to the fixing ring and the connecting ring respectively, the piston and the inner wall of the pressure cylinder are tightly fitted, the pointer and the scale are slidably connected, and the outer surface of the scale is provided with scale lines.

[0015] Furthermore, the end of the return air unit away from the first fan is a return air outlet, and the end of the fresh air unit away from the second fan is a fresh air outlet. The directions of the first fan and the second fan are opposite. A pressure detection assembly is provided on one side of the filter assembly. There are two ducts, which are respectively connected to the cold and hot source equipment.

[0016] The technical solution provided by this application has at least the following technical effects or advantages: 1. The use of a filter assembly effectively solves the problem that over time, these impurities will accumulate on the filter surface and gradually form a thick dust layer, which will not only reduce the filtering efficiency of the filter, but also increase the resistance of air passing through the filter, resulting in increased wind resistance of the fan, increased losses in equipment operation, and may even cause the unit to shut down. Traditional filters are difficult to disassemble for maintenance, wasting the working time of the unit. The present invention can automatically clean the filter net when the filter is clogged through the filter assembly, and can collect dust in a centralized manner during cleaning, which can reduce secondary clogging of collected dust. At the same time, a flexible fixing method is used to limit the filter, thereby reducing the risk of filter damage caused by vibration. When the filter is clogged, this flexible connection can buffer the additional pressure caused by the clog, and the internal structure and materials may be damaged due to excessive pressure, thereby shortening the service life of the filter. The filter can also be quickly disassembled and assembled through a flexible fixing mechanism, which is convenient for filter maintenance.

[0017] 2. The use of a pressure detection assembly effectively solves the problem that the main purpose of air handling unit pressure monitoring is to understand the internal pressure status of the unit in real time, promptly discover and deal with abnormal situations, and ensure the safe, stable and efficient operation of the unit. However, the existing pressure detection mechanism is difficult to observe the internal pressure status of the unit in a timely and accurate manner, which leads to the failure to maintain the equipment in a timely manner. The present invention can observe the pressure changes inside the air handling unit in a timely and accurate manner through the pressure detection assembly, so that timely maintenance can be performed when the pressure of the air handling unit changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present application; Figure 2 It is a schematic cross-sectional diagram of the overall structure in the embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the filter assembly in the embodiment of the present application; Figure 4 This is a schematic diagram of the structure of the third threaded rod in the embodiment of the present application; Figure 5 Schematic diagram of the limit mechanism structure in the embodiment of the present application; Figure 6 It is a schematic diagram of the local structure of the bracket in the embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the first fixed block in an embodiment of the present application; Figure 8 It is a schematic diagram of the structure of the adjustment mechanism in the embodiment of the present application; Fig. 9This is a schematic diagram of the cleaning mechanism structure in an embodiment of the present application; Fig.10 Schematic diagram of the dust collection mechanism in the embodiment of the present application; Fig.11 This is a schematic diagram of the structure of the pressure detection assembly in the embodiment of the present application; Fig.12 This is a schematic diagram of the structural cross-section of the pressure cylinder in the embodiment of this application. In the figure: 1, return air unit; 2, first fan; 3, fresh air unit; 4, second fan; 5, mixing tank; 6, filter assembly; 61, bracket; 62, filter mesh; 63, limit mechanism; 631, first fixed block; 632, first threaded rod; 633, first limit frame; 634, second limit frame; 635, first connecting block; 636, second connecting block; 637, first slide bar; 638, first spring; 64, adjustment mechanism; 641, second fixed block; 642, second threaded rod; 643, slide bar; 644, drive rod; 645, storage rod; 646, telescopic rod; 647, adjustment block; 648, drive block; 649, driving groove; 65, button; 66, third threaded rod; 67, cleaning mechanism; 671, supporting bar; 672, collar; 673, second slide bar; 674, second spring; 675, cleaning brush; 68, dust accumulation mechanism; 681, first dust box; 682, plug rod; 683, second dust box; 684, bump; 685, baffle; 69, stepping motor; 610, belt; 7, pressure detection assembly; 71, pressure cylinder; 72, connecting hole; 73, piston; 74, third slide bar; 75, fixing ring; 76, third spring; 77, connecting ring; 78, pointer; 79, scale; 8, cooler; 9, catheter. DETAILED DESCRIPTION

[0019] As time goes by, these impurities will accumulate on the surface of the filter and gradually form a thick dust layer. The present invention can automatically clean the filter net when the filter is blocked through the filter component, and can collect the dust in a centralized manner during cleaning; it is difficult for the pressure detection mechanism to timely and accurately observe the internal pressure of the unit. The present invention can timely and accurately observe the pressure changes inside the air handling unit through the pressure detection component, so as to perform timely maintenance when the pressure of the air handling unit changes.

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0021] See also Figure 1 and Figure 2As shown, an air handling unit is provided, the inner cavity of the return air unit 1 is provided with a first fan 2, the lower surface of the return air unit 1 is fixedly installed with a fresh air unit 3, one end of the return air unit 1 and the fresh air unit 3 are connected to the indoor, and the other end is connected to the outdoor, the inner cavity of the fresh air unit 3 is provided with a second fan 4, a mixing tank 5 is provided at the junction of the return air unit 1 and the fresh air unit 3, the inner cavity of the fresh air unit 3 is provided with a filter component 6, the inner cavity of the fresh air unit 3 is provided with a pressure detection component 7, the inner cavity of the fresh air unit 3 is fixedly installed with a surface cooler 8, the outer surface of the surface cooler 8 is sleeved with a duct 9, the end of the return air unit 1 away from the first fan 2 is a return air outlet, the return air outlet is connected to the indoor, the end of the fresh air unit 3 away from the second fan 4 is a fresh air outlet, the fresh air outlet is connected to the outdoor, the first fan 2 and The direction of the second fan 4 is opposite, and a pressure detection assembly 7 is provided on one side of the filter assembly 6. There are two ducts 9, which are respectively connected to the cold and hot source equipment. Through the operation of the first fan 2, the indoor air enters from the return air port at one end of the return air unit 1, and part of the wind is discharged from the other end of the return air unit 1. Under the operation of the second fan 4, a part of the air is mixed with the fresh air entering from the fresh air port of the fresh air unit 3 through the mixing tank 5, and the wind is filtered through the filter assembly 6 to remove the particles and impurities accompanying the wind. The duct 9 is connected to the cold source or the heat source as needed. Under the operation of the surface cooler 8, the duct 9 is connected to the cold source or the heat source, so that the required cold air or hot air is blown into the room. The pressure detection assembly 7 is used to detect the pressure in the inner cavity of the fresh air unit 3, which is convenient for judging the internal pressure of the equipment.

[0022] See also Figure 3 and Figure 4As shown, the filter assembly 6 includes a bracket 61, a filter mesh 62 is fixedly installed on the inner wall of the bracket 61, a limit mechanism 63 is provided on the upper surface of the fresh air unit 3, an adjustment mechanism 64 is provided on the upper surface of the fresh air unit 3, a button 65 is provided on the outer surface of the bracket 61, a third threaded rod 66 is rotatably connected to the inner wall of the bracket 61, a cleaning mechanism 67 is sleeved on the outer surface of the third threaded rod 66, a dust accumulation mechanism 68 is provided at the bottom end of the cleaning mechanism 67, a stepping motor 69 is provided on the upper surface of the bracket 61, a belt 610 is sleeved on the outer surface of the third threaded rod 66, and the filter assembly 6 has three , the filter mesh 62 is provided with filter holes, the filter holes of the filter mesh 62 in the three filter components 6 are reduced in sequence, and the filter hole of the filter mesh 62 close to the surface cooler 8 is the smallest, so that the fresh air finally entering the room is purer, the limit mechanism 63 is located in the middle of the bottom of the bracket 61, the adjustment mechanism 64 and the button 65 are fitted, and the adjustment mechanism 64 and the button 65 are arranged on both sides of the bracket 61. The output end of the stepper motor 69 is sleeved with the belt 610, the button 65 and the stepper motor 69 are electrically connected, and the pressing of the button 65 controls the stepper motor 69 to work, and the filter component 6 is used to filter The impurity particles in the air are filtered by setting three fresh air units 3 in stages, so that the impurities in the air can be removed more cleanly, and the filter assembly 6 can clean itself when blocked, and the clean dust can be collected and cleaned regularly, and the filter mesh 62 can be quickly disassembled when maintenance is required. When the filter mesh 62 is blocked, the flow of air inside the fresh air unit 3 becomes unsmooth, so that pressure accumulates at the blocked part, so that the filter mesh 62 moves as a whole in the direction of lower pressure under pressure, and at this time the button 65 on the bracket 61 and the adjustment The contact of the joint mechanism 64 makes the stepper motor 69 work, and the work of the stepper motor 69 drives the belt 610 to rotate, and the rotation of the belt 610 drives the third threaded rod 66 to rotate, and the rotation of the third threaded rod 66 drives the cleaning mechanism 67 to move back and forth on the outer surface of the filter mesh 62, so that the cleaning mechanism 67 dredges the filter mesh 62, and the dust dropped by the cleaning mechanism 67 during cleaning falls into the dust accumulation mechanism 68 for centralized collection, and the limiting mechanism 63 is used to flexibly fix the bracket 61, and at the same time, when the filter mesh 62 needs to be maintained, the bracket 61 can be quickly removed from the limiting mechanism 63.

[0023] See also Figure 5 , Figure 6 and Figure 7As shown, the limiting mechanism 63 includes a first fixed block 631, the first fixed block 631 is fixedly connected to the upper surface of the fresh air unit 3, the inner cavity of the first fixed block 631 is rotatably connected to the first threaded rod 632, the outer surface of the first threaded rod 632 is slidably connected to the first limiting frame 633, the outer surface of the first threaded rod 632 is slidably connected to the second limiting frame 634, the inner wall of the first limiting frame 633 is fixedly installed with a first connecting block 635, the inner wall of the second limiting frame 634 is fixedly installed with a second connecting block 636, the two ends of the bracket 61 are fixedly installed with a first sliding rod 637, the outer surface of the first sliding rod 637 is sleeved with a first spring 638, the first connecting block 635 and the first threaded rod are fixedly installed with a first spring 638, The rod 632 is connected by a thread, and the second connecting block 636 is connected to the first threaded rod 632 by a thread, and the thread directions at both ends of the first threaded rod 632 are opposite. When the first threaded rod 632 rotates, the first connecting block 635 and the second connecting block 636 move toward or away from each other, and the first sliding rod 637 is slidably connected to the first limiting frame 633 and the second limiting frame 634 respectively. The first spring 638 is provided at both ends of the bracket 61, and the first spring 638 at one end is respectively located between the bracket 61 and the first limiting frame 633, and the first spring 638 at the other end is respectively located between the bracket 61 and the second limiting frame 634. When the filter mesh 62 needs to be maintained, the first fixed The first threaded rod 632 in the inner cavity of the fixed block 631, the rotation of the first threaded rod 632 drives the first connecting block 635 and the second connecting block 636 to move on the first threaded rod 632, and the movement of the first connecting block 635 and the second connecting block 636 drives the second limiting frame 634 and the first limiting frame 633 to move, so that the first sliding rod 637 is disengaged from the second limiting frame 634 and the first limiting frame 633 respectively. At this time, the bracket 61 can be taken out, so that the filter mesh 62 can be maintained. At the same time, the limiting mechanism 63 has a flexible fixing effect on the bracket 61. When the filter mesh 62 is blocked, the pressure of the air causes the filter mesh 62 to be displaced to a certain extent, so that the bracket 61 The whole body shakes under unstable pressure, so that the bracket 61 moves and drives the first slide bar 637 to move. The movement of the first slide bar 637 drives the bracket 61 to squeeze the first spring 638. The elastic force of the first spring 638 restores the bracket 61 to its original position, thereby reducing the shaking amplitude of the bracket 61 and the noise generated during shaking, thereby preventing the overall structure and material of the filter assembly 6 from being damaged due to excessive pressure, avoiding a rigid connection between the filter mesh 62 and the air handling unit, and reducing the risk of filter damage due to vibration. When the filter mesh 62 is blocked, this flexible connection can buffer the additional pressure caused by the blockage and protect the filter mesh 62 from damage.

[0024] See also Figure 3 and Figure 8As shown, the adjustment mechanism 64 includes a second fixed block 641, the second fixed block 641 is fixedly connected to the fresh air unit 3, the inner cavity of the second fixed block 641 is rotatably connected to the second threaded rod 642, the outer surface of the second fixed block 641 is slidably connected to the slider 643, the slider 643 and the second threaded rod 642 are threadedly connected, the outer surface of the slider 643 is fixedly installed with a driving rod 644, the outer surface of the second fixed block 641 is fixedly installed with a storage rod 645 at four corners, the inner cavity of the storage rod 645 is slidably connected to the telescopic rod 646, the end of the telescopic rod 646 away from the storage rod 645 is fixedly installed with an adjustment block 647, the outer surface of the adjustment block 647 is fixedly installed with a driving block 648, the outer surface of the driving block 648 is provided with a driving groove 649, the driving groove 649 is inclined, and the driving rod 644 and the driving groove 649 is slidably connected, the adjustment block 647 and the button 65 are fitted together, and the adjustment mechanism 64 can adjust the distance between it and the button 65, so that it is convenient to clean the filter mesh 62 when it is blocked according to needs, and the second threaded rod 642 is rotated to drive the slider 643 to slide on the second fixed block 641, and the sliding of the slider 643 drives the driving rod 644 to slide in the driving groove 649 on the driving block 648, so that the driving block 648 moves, so that the telescopic rod 646 slides in the inner cavity of the storage rod 645 to change the distance between the adjustment block 647 and the second fixed block 641, thereby changing the distance between the adjustment block 647 and the button 65, so that when the bracket 61 shakes, the button 65 can be pressurized by the adjustment block 647 according to the set distance, so that the stepping motor 69 works to drive the cleaning mechanism 67 to clean the filter mesh 62.

[0025] See also Fig. 9 and Fig.10As shown, the cleaning mechanism 67 includes a support bar 671, a collar 672 is fixedly installed on the outer surface of the support bar 671, the collar 672 and the third threaded rod 66 are connected by threads, the inner cavity of the support bar 671 is slidably connected with a second slide bar 673, the outer surface of the second slide bar 673 is sleeved with a second spring 674, one end of the second slide bar 673 is fixedly installed with a cleaning brush 675, the cleaning brush 675 and the filter mesh 62 are tightly fitted, the second spring 674 is located between the cleaning brush 675 and the support bar 671, and the dust collection mechanism 68 includes a first dust box 681, the outer surface of the first dust box 681 is fixedly installed with an insertion rod 682, the outer surface of the insertion rod 682 is sleeved with the second dust box 6 83, the middle part of the inner wall of the first dust box 681 and the second dust box 683 are fixedly installed with a protrusion 684, the middle of the protrusion 684 is convex, the first dust box 681 and the second dust box 683 are fixedly installed with a shielding plate 685 on both sides, and the shielding plate 685 is tilted downward along the direction of the protrusion 684, the support bar 671 is fixedly connected to the first dust box 681, the first dust box 681 and the second dust box 683 are respectively located on both sides of the filter mesh 62, and are slidably connected to the filter mesh 62, when the stepping motor 69 drives the third threaded rod 66 to rotate, the rotation of the third threaded rod 66 drives the ring 672 to reciprocate on the third threaded rod 66, and the movement of the ring 672 The support bar 671 is driven to move, so that the cleaning brush 675 cleans the filter mesh 62, and the dust particles on the filter mesh 62 fall into the inner cavities of the first dust box 681 and the second dust box 683 on both sides of the filter mesh 62. Since the inner cavity of the fresh air unit 3 is in a ventilation state during operation, a shielding plate 685 is provided to guide and shield the falling dust. Since the shielding plate 685 is tilted, the dust particles flow from the shielding plate 685 to the protrusion 684, and the protrusion 684 is raised in the middle, so that the dust particles enter the first dust box 681 and the second dust box 683 on both sides, and the shielding plate 685 is provided at the upper end to shield the dust particles, so that in the ventilation state, it can be blocked. The wind stops the dust particles from being blown up, thus causing secondary blockage. When regular cleaning is required, the rod 682 is pulled out of the inner cavity of the second dust box 683 by external force, and the bracket 61 is quickly disassembled on the limiting mechanism 63, so as to facilitate the dumping of the internal dust and achieve regular cleaning. When the cleaning brush 675 is cleaning, some particles squeeze the cleaning brush 675, causing the cleaning brush 675 to slide the second slide bar 673 on the support bar 671, thereby compressing the second spring 674. The elastic force of the second spring 674 restores the cleaning brush 675 to its original position, so that the cleaning brush 675 has a slapping effect on the filter mesh 62, which is convenient for cleaning the dust that is blocked by the filter mesh 62.

[0026] See also Fig.11 and Fig.12As shown, the pressure detection assembly 7 includes a pressure cylinder 71, one end of the pressure cylinder 71 is provided with a connecting hole 72, the connecting hole 72 is located in the inner cavity of the fresh air unit 3, the inner cavity of the pressure cylinder 71 is slidably connected with a piston 73, the outer surface of the piston 73 is fixedly installed with a third slide rod 74, the inner wall of the pressure cylinder 71 is fixedly installed with a fixing ring 75, the outer surface of the third slide rod 74 is sleeved with a third spring 76, the outer surface of the third slide rod 74 is fixedly installed with a connecting ring 77, the end of the third slide rod 74 away from the piston 73 is fixedly installed with a pointer 78, the end of the pressure cylinder 71 away from the pressure cylinder 71 is fixedly installed with a scale 79, the third spring 76 is located between the connecting ring 77 and the fixing ring 75, and the two ends of the third spring 76 are fixedly connected to the fixing ring 75 and the connecting ring 77 respectively. The wall fits tightly, the pointer 78 and the scale 79 are slidably connected, and the outer surface of the scale 79 is provided with scale lines. When the pressure inside the fresh air unit 3 changes, the inner cavity of the fresh air unit 3 is connected to the connecting hole 72 to make the piston 73 move in the inner cavity of the pressure cylinder 71. The movement of the piston 73 drives the third slide bar 74 to move. The movement of the third slide bar 74 drives the pointer 78 to move on the scale 79. The pressure condition of the inner cavity of the fresh air unit 3 can be judged according to the scale on the scale 79, which is convenient for rapid maintenance of the equipment according to the pressure change. The third spring 76 is between the connecting ring 77 and the fixing ring 75. The elastic force of the third spring 76 is used to balance the position of the piston 73 to ensure that the piston 73 is fixed at a certain position in the inner cavity of the pressure cylinder 71 under normal pressure, and the pointer 78 is stable at a certain scale of the scale 79.

[0027] To summarize, the indoor air enters from the return air port at one end of the return air unit 1 through the operation of the first fan 2, and part of the air is discharged from the other end of the return air unit 1. Under the operation of the second fan 4, a part of the air is mixed with the fresh air entering from the fresh air port of the fresh air unit 3 through the mixing tank 5, and the air is filtered through the filter component 6 to remove particles and impurities accompanying the air. The duct 9 is connected to the cold source or the heat source as required, and under the operation of the surface cooler 8, the required cold air or hot air is blown into the room. The pressure detection component 7 is used to detect the pressure in the inner cavity of the fresh air unit 3, so as to judge the internal pressure of the equipment. When the filter mesh 62 is blocked, the air flow inside the fresh air unit 3 becomes unsmooth, thereby generating pressure accumulation at the blocked part, so that under the pressure condition, the filter mesh 62 moves as a whole in the direction of lower pressure. At this time, the button 65 on the bracket 61 contacts the adjustment mechanism 64 to make the stepper motor 69 work, and the operation of the stepper motor 69 drives The belt 610 rotates, and the rotation of the belt 610 drives the third threaded rod 66 to rotate. The rotation of the third threaded rod 66 drives the cleaning mechanism 67 to move back and forth on the outer surface of the filter mesh 62, so that the cleaning mechanism 67 dredges the filter mesh 62, and the dust during cleaning by the cleaning mechanism 67 falls on the dust accumulation mechanism 68 for centralized collection. The limiting mechanism 63 is used to flexibly fix the bracket 61. At the same time, when the filter mesh 62 needs to be maintained, the bracket 61 is quickly disassembled from the limiting mechanism 63. When the pressure inside the fresh air unit 3 changes, the inner cavity of the fresh air unit 3 is connected to the connecting hole 72, so that the piston 73 moves in the inner cavity of the pressure cylinder 71. The movement of the piston 73 drives the third sliding rod 74 to move. The movement of the third sliding rod 74 drives the pointer 78 to move on the scale 79. The pressure condition of the inner cavity of the fresh air unit 3 can be judged according to the scale on the scale 79, so that the equipment can be quickly maintained according to the pressure change.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0029] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An air handling unit, comprising a return air unit (1), It is characterized in that The return air unit (1) has an inner cavity provided with a first fan (2), a fresh air unit (3) is fixedly mounted on the lower surface of the return air unit (1), a second fan (4) is mounted in the inner cavity of the fresh air unit (3), a mixing tank (5) is provided at the junction of the return air unit (1) and the fresh air unit (3), a filter assembly (6) is provided in the inner cavity of the fresh air unit (3), a pressure detection assembly (7) is provided in the inner cavity of the fresh air unit (3), a surface cooler (8) is fixedly mounted in the inner cavity of the fresh air unit (3), and a conduit (9) is sleeved on the outer surface of the surface cooler (8); The filter assembly (6) comprises a bracket (61), a filter mesh (62) is fixedly mounted on the inner wall of the bracket (61), a limit mechanism (63) is arranged on the upper surface of the fresh air unit (3), an adjustment mechanism (64) is arranged on the upper surface of the fresh air unit (3), a button (65) is arranged on the outer surface of the bracket (61), a third threaded rod (66) is rotatably connected to the inner wall of the bracket (61), a cleaning mechanism (67) is sleeved on the outer surface of the third threaded rod (66), a dust accumulation mechanism (68) is arranged at the bottom end of the cleaning mechanism (67), a stepping motor (69) is arranged on the upper surface of the bracket (61), and a belt (610) is sleeved on the outer surface of the third threaded rod (66).

2. An air handling unit according to claim 1, It is characterized in that There are three filter assemblies (6), and the filter mesh (62) is provided with filter holes. The filter holes of the filter meshes (62) in the three filter assemblies (6) decrease in size in sequence, and the filter hole of the filter mesh (62) close to the surface cooler (8) is the smallest. The limit mechanism (63) is located at the middle part of the bottom of the bracket (61), and the adjustment mechanism (64) and the button (65) are fitted together. The adjustment mechanism (64) and the button (65) are provided on both sides of the bracket (61). The output end of the stepper motor (69) is sleeved with the belt (610), and the button (65) and the stepper motor (69) are electrically connected, and pressing the button (65) controls the stepper motor (69) to work.

3. An air handling unit according to claim 1, It is characterized in that The limiting mechanism (63) comprises a first fixed block (631), the first fixed block (631) is fixedly connected to the upper surface of the fresh air unit (3), the inner cavity of the first fixed block (631) is rotatably connected to a first threaded rod (632), the outer surface of the first threaded rod (632) is slidably connected to a first limiting frame (633), the outer surface of the first threaded rod (632) is slidably connected to a second limiting frame (634), the inner wall of the first limiting frame (633) is fixedly mounted with a first connecting block (635), the inner wall of the second limiting frame (634) is fixedly mounted with a second connecting block (636), and first sliding rods (637) are fixedly mounted at both ends of the bracket (61), and the outer surface of the first sliding rod (637) is sleeved with a first spring (638).

4. An air handling unit according to claim 3, It is characterized in that The first connection block (635) and the first threaded rod (632) are connected by threads, and the second connection block (636) and the first threaded rod (632) are connected by threads, and the threads at two ends of the first threaded rod (632) are in opposite directions. When the first threaded rod (632) rotates, the first connection block (635) and the second connection block (636) move toward or away from each other. The first sliding rod (637) is slidably connected to the first limiting frame (633) and the second limiting frame (634), respectively. First springs (638) are provided at both ends of the bracket (61), and the first spring (638) at one end is respectively located between the bracket (61) and the first limiting frame (633), and the first spring (638) at the other end is respectively located between the bracket (61) and the second limiting frame (634).

5. An air handling unit according to claim 1, It is characterized in that The regulating mechanism (64) comprises a second fixed block (641), the second fixed block (641) is fixedly connected to the fresh air unit (3), the inner cavity of the second fixed block (641) is rotatably connected to a second threaded rod (642), the outer surface of the second fixed block (641) is slidably connected to a slider (643), the slider (643) and the second threaded rod (642) are connected by threads, the outer surface of the slider (643) is fixedly mounted with a driving rod (644), and the outer surface of the second fixed block (641) is fixedly mounted with four corners. A storage rod (645) is provided, and a telescopic rod (646) is slidably connected to the inner cavity of the storage rod (645), an adjustment block (647) is fixedly installed on one end of the telescopic rod (646) away from the storage rod (645), a driving block (648) is fixedly installed on the outer surface of the adjustment block (647), a driving groove (649) is provided on the outer surface of the driving block (648), and the driving groove (649) is inclined, the driving rod (644) and the driving groove (649) are slidably connected, and the adjustment block (647) and the button (65) are in close contact.

6. An air handling unit according to claim 1, It is characterized in that The cleaning mechanism (67) comprises a support bar (671), a collar (672) is fixedly mounted on the outer surface of the support bar (671), the collar (672) and the third threaded rod (66) are connected by threads, a second slide bar (673) is slidably connected to the inner cavity of the support bar (671), a second spring (674) is sleeved on the outer surface of the second slide bar (673), a cleaning brush (675) is fixedly mounted on one end of the second slide bar (673), the cleaning brush (675) and the filter mesh (62) are tightly fitted, and the second spring (674) is located between the cleaning brush (675) and the support bar (671).

7. An air handling unit according to claim 6, It is characterized in that The dust collection mechanism (68) comprises a first dust box (681), an insertion rod (682) is fixedly mounted on the outer surface of the first dust box (681), a second dust box (683) is sleeved on the outer surface of the insertion rod (682), a protrusion (684) is fixedly mounted on the middle part of the inner wall of the first dust box (681) and the second dust box (683), the protrusion (684) is raised in the middle, shielding plates (685) are fixedly mounted on both sides of the first dust box (681) and the second dust box (683), and the shielding plates (685) are tilted downward along the direction of the protrusion (684), the support bar (671) and the first dust box (681) are fixedly connected, and the first dust box (681) and the second dust box (683) are respectively located on both sides of the filter mesh (62) and are slidably connected to the filter mesh (62).

8. An air handling unit according to claim 1, It is characterized in that The pressure detection assembly (7) comprises a pressure cylinder (71), one end of the pressure cylinder (71) is provided with a connecting hole (72), the connecting hole (72) is located in the inner cavity of the fresh air unit (3), the inner cavity of the pressure cylinder (71) is slidably connected with a piston (73), the outer surface of the piston (73) is fixedly mounted with a third sliding rod (74), the inner wall of the pressure cylinder (71) is fixedly mounted with a fixing ring (75), the outer surface of the third sliding rod (74) is sleeved with a third spring (76), the outer surface of the third sliding rod (74) is fixedly mounted with a connecting ring (77), the end of the third sliding rod (74) away from the piston (73) is fixedly mounted with a pointer (78), and the end of the pressure cylinder (71) away from the pressure cylinder (71) is fixedly mounted with a scale (79).

9. An air handling unit according to claim 8, It is characterized in that The third spring (76) is located between the connecting ring (77) and the fixing ring (75), and two ends of the third spring (76) are fixedly connected to the fixing ring (75) and the connecting ring (77) respectively. The piston (73) and the inner wall of the pressure cylinder (71) are tightly fitted. The pointer (78) and the scale (79) are slidably connected, and the outer surface of the scale (79) is provided with scale lines.

10. An air handling unit according to claim 1, It is characterized in that The end of the return air unit (1) away from the first fan (2) is a return air outlet, and the end of the fresh air unit (3) away from the second fan (4) is a fresh air outlet. The first fan (2) and the second fan (4) are in opposite directions. A pressure detection assembly (7) is provided on one side of the filter assembly (6). There are two conduits (9), which are respectively connected to cold and hot source equipment.

Images