A central air conditioning clean air fresh air unit with a heat recovery mechanism

Abstract

This utility model relates to the field of fresh air handling equipment technology, specifically to a central air conditioning clean fresh air handling unit with a heat recovery mechanism. It includes a casing with a cover hinged to the top. The left end of the cover is fixedly connected to the casing via a locking mechanism. Fixed frames are fixedly installed at both the front and rear ends of the casing, and shock-absorbing boxes are fixedly installed on the top of each of the two sets of fixed frames. A mounting plate is fixedly connected to the top of each shock-absorbing box. A movable seat is slidably connected to the bottom of the inside of the shock-absorbing box. A damper is fixedly installed between the top of the movable seat and the shock-absorbing box. Guide rods are fixedly connected to both the left and right ends of the inside of the shock-absorbing box. Buffer springs are sleeved on the outer sides of each of the two sets of guide rods. Movable sleeves are slidably connected to the outer sides of each of the two sets of guide rods at opposite ends of the buffer springs. This utility model improves the stability and safety of the fresh air handling unit through its design, while also enhancing the convenience of inspection and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of fresh air system technology, specifically to a central air conditioning clean fresh air system with a heat recovery mechanism. Background Technology

[0002] A heat recovery fresh air system is a system that filters and purifies fresh air through multiple layers of equipment before sending it indoors, while simultaneously recovering the stale air stored inside. After further processing through energy exchange, the stale air is then discharged outdoors, thus maintaining a stable temperature. This system is both economical and environmentally friendly.

[0003] A search revealed that CN204902103U discloses a total heat exchange fresh air fan, including a fresh air fan, an exhaust fan, and a total heat exchange core. The fresh air fan and the exhaust fan are arranged on both sides of the total heat exchange core and on the extension lines of different airflow paths within the total heat exchange core. The fan blade axes of the fresh air fan and the exhaust fan are perpendicular to the length direction of the total heat exchange core. During operation, outdoor fresh air enters the air chamber, then enters the fresh air bypass channel through the bypass air inlet, and then enters the air chamber through the bypass air outlet. The fresh air centrifugal fan then sends it into the room through the air outlet. Indoor exhaust air enters the air chamber through the air outlet, then enters the exhaust bypass channel through the bypass air inlet, and then enters the air chamber through the bypass air outlet. The exhaust centrifugal fan then sends it out to the outside through the air outlet. Although the aforementioned total heat exchange fresh air unit can effectively supply air to the room, fresh air units are generally installed on the ceiling. During operation, the fan will vibrate, which will not only generate a lot of noise and affect the user's life, but also cause the mounting screws to loosen, posing a risk of the equipment falling.

[0004] Therefore, it is of great importance to design a central air conditioning clean air fresh air unit with a heat recovery mechanism to solve the above-mentioned defects. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model designs a central air conditioning clean air fresh air unit with a heat recovery mechanism. This central air conditioning clean air fresh air unit aims to solve the technical problem that the vibration generated when the fan rotates during the operation of the existing fresh air unit not only generates a lot of noise that affects the user's life, but also causes the installation screws to loosen due to fan vibration, posing a risk of equipment falling.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A central air conditioning clean air fresh air unit with a heat recovery mechanism includes a chassis, a cover hinged to the top of the chassis, the left end of the cover being fixedly connected to the chassis via a locking mechanism, and fixed frames fixedly installed at both the front and rear ends of the chassis, with shock-absorbing boxes fixedly installed on the top of both sets of fixed frames. A mounting plate is fixedly connected to the top of the shock absorber box. A movable seat is slidably connected to the bottom of the inside of the shock absorber box. A damper is fixedly installed between the top of the movable seat and the shock absorber box. Guide rods are fixedly connected to both the left and right ends inside the shock absorber box. Buffer springs are sleeved on the outer sides of both sets of guide rods. Movable sleeves are slidably connected to the outer sides of both sets of guide rods and at the opposite ends of the two sets of buffer springs. Transmission rods are installed between the two sets of movable sleeves and the damper.

[0007] As a preferred embodiment of this utility model, mounting holes are fixedly installed at both ends of the mounting plate, the top ends of both sets of transmission rods are rotatably connected to the movable sleeve, and the bottom ends of both sets of transmission rods are rotatably connected to the outside of the damper through connectors.

[0008] As a preferred embodiment of this utility model, indoor air supply vents and indoor air return vents are fixedly installed on both the left and right ends of the front of the chassis, and outdoor exhaust vents and outdoor air inlets are fixedly installed on both the left and right ends of the back of the chassis, respectively. Exhaust fans are fixedly installed at the connection points between the interior of the chassis and the indoor air supply vents and outdoor air inlets. A partition is fixedly connected inside the chassis. Coarse filter boxes are fixedly installed on both the front and rear sides of the chassis and on the left and right sides of the partition. A rotary heat exchanger, an electrostatic precipitator, and a fine filter box are fixedly installed at the rear end of the chassis and in front of the coarse filter box.

[0009] As a preferred embodiment of this utility model, each of the two sets of coarse filter boxes has a first positioning slot inside, and a filter screen is inserted into each of the two sets of first positioning slots.

[0010] As a preferred embodiment of this utility model, both the rotary heat exchanger and the electrostatic precipitator are fixedly equipped with maintenance covers on their tops.

[0011] As a preferred embodiment of this utility model, the interior of the fine filter box is provided with a second positioning slot, and a corrugated HEPA filter membrane is inserted into the interior of the second positioning slot.

[0012] As a preferred embodiment of this utility model, the locking mechanism includes a locking head fixedly installed on the left end of the top of the cover, a locking box fixedly connected to the left end of the top of the chassis, locking pins slidably connected to both the front and rear ends inside the locking box, an operating handle fixedly connected to the inside of the locking box at the opposite end of the two sets of locking pins, and a reset spring installed inside the locking box between the two sets of operating handles.

[0013] As a preferred embodiment of this utility model, a flip cover handle is fixedly connected to the top of the locking head, and both sets of locking pins are inserted into the locking head through locking holes.

[0014] As a preferred embodiment of this utility model, the fixing frame consists of two sets of half frames, which are respectively fitted onto the left and right sides of the chassis. The two sets of half frames are fixedly connected by locking screws. The top of each set of half frames is fixedly connected to the movable seat by mounting screws. Rubber protective pads are fixedly connected to the inner side of each set of half frames.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, through the coordinated design of the chassis, cover and locking mechanism, when inspecting the inside of the chassis, the cover is first opened by the locking mechanism. The coarse filter box can quickly insert and remove the filter screen through the first positioning slot. The inspection cover on the top of the rotary heat exchanger and electrostatic precipitator can be opened to facilitate internal maintenance. The fine filter box can quickly insert and remove the corrugated HEPA filter membrane through the second positioning slot, realizing modular maintenance of the whole system, thereby improving the convenience of inspection and maintenance.

[0016] 2. In this utility model, through the coordinated design of the chassis, fixed frame, and shock absorber box, two sets of half-frames are first fitted onto the left and right sides of the chassis, and then fixed with locking screws. Then, the top of the half-frame is fixed to the movable seat with mounting screws. Finally, the chassis is hung on the ceiling by inserting the corresponding screws into the mounting holes. When the chassis vibrates during operation, the vibration is first transmitted to the shock absorber box through the fixed frame. Under the action of vibration, the movable seat inside the shock absorber box begins to slide up and down along the inside of the shock absorber box. The damper at the top of the movable seat begins to function, slowing down the movement speed of the movable seat through the damping material inside, thereby reducing the vibration amplitude. At the same time, when the damper extends and retracts, it drives the transmission rod to swing under the connection of the connector. The transmission rod pushes the movable sleeve on the outside of the guide rod to compress the buffer spring, further absorbing the remaining vibration energy. This fully buffers the vibration and can quickly restore a stable state, avoiding the generation of large noise that may affect the user's life. It also avoids the risk of falling due to the screws at the mounting plate loosening caused by vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the internal structure of the locking box of this utility model; Figure 4 for Figure 3 Enlarged view at point B in the middle; Figure 5 This is a schematic diagram of the internal structure of the chassis of this utility model; Figure 6This is a schematic diagram of the internal structure of the fixed frame and shock absorber box of this utility model.

[0018] In the diagram: 1. Chassis; 101. Indoor air supply vent; 102. Indoor return air vent; 103. Outdoor exhaust vent; 104. Outdoor air inlet; 105. Exhaust fan; 106. Partition; 107. Coarse filter box; 108. Rotary heat exchanger; 109. Electrostatic precipitator; 110. Fine filter box; 111. First positioning slot; 112. Filter screen; 113. Inspection cover; 114. Second positioning slot; 115. HEPA filter membrane; 2. Cover; 3. Locking mechanism; 301. Locking 302. Head; 303. Locking box; 304. Locking post; 305. Operating handle; 306. Return spring; 307. Flip cover handle; 308. Locking hole; 4. Fixing frame; 401. Half frame; 402. Locking screw; 403. Mounting screw; 404. Rubber protective pad; 5. Shock absorber box; 501. Mounting plate; 502. Movable seat; 503. Damper; 504. Guide rod; 505. Buffer spring; 506. Moving sleeve; 507. Transmission rod; 508. Mounting hole; 509. Connector. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Example: Please refer to Figures 1-6 This utility model provides a technical solution: A central air conditioning clean air fresh air unit with a heat recovery mechanism includes a casing 1, a cover 2 hinged to the top of the casing 1, the left end of the cover 2 being fixedly connected to the casing 1 through a locking mechanism 3, and fixed frames 4 being fixedly installed at both the front and rear ends of the casing 1, with shock-absorbing boxes 5 fixedly installed on the top of both sets of fixed frames 4.

[0021] First, in this embodiment, the specific structure of the shock absorber box 5 is as follows: A mounting plate 501 is fixedly connected to the top of the shock absorber box 5. A movable seat 502 is slidably connected to the bottom of the inside of the shock absorber box 5. A damper 503 is fixedly installed between the top of the movable seat 502 and the shock absorber box 5. Guide rods 504 are fixedly connected to both the left and right ends of the inside of the shock absorber box 5. Buffer springs 505 are sleeved on the outer sides of both sets of guide rods 504. Movable sleeves 506 are slidably connected to the outer sides of both sets of guide rods 504 and the opposite ends of the two sets of buffer springs 505. Transmission rods 507 are installed between both sets of movable sleeves 506 and the damper 503. Mounting holes 508 are fixedly installed on both the left and right ends of the mounting plate 501. The top ends of both sets of transmission rods 507 are rotatably connected to the movable sleeves 506. The bottom ends of both sets of transmission rods 507 are rotatably connected to the outer side of the damper 503 through connectors 509. After the fixing frame 4 is fixedly installed on the outside of the chassis 1, the chassis 1 is hung by inserting corresponding screws into the mounting holes 508. At the ceiling, when the unit 1 vibrates during operation, the vibration is first transmitted to the damping box 5 through the fixed frame 4. The movable seat 502 inside the damping box 5 begins to slide up and down along the inside of the damping box 5 under the action of vibration. The damper 503 on the top of the movable seat 502 begins to function, slowing down the movement speed of the movable seat 502 through the damping material inside, thereby reducing the vibration amplitude. At the same time, when the damper 503 extends and retracts, it drives the transmission rod 507 to swing under the connection of the connector 509. The transmission rod 507 pushes the movable sleeve 506 on the outside of the guide rod 504 to compress the buffer spring 505, further absorbing the remaining vibration energy. This effectively buffers the vibration and can quickly restore a stable state, avoiding the generation of large noise that may affect the user's life. It also prevents the screws at the mounting plate 501 from loosening due to vibration, thus avoiding the risk of falling. This improves the stability and safety of the fresh air unit.

[0022] Then, indoor air supply vents 101 and indoor return air vents 102 are fixedly installed on the left and right sides of the front of the chassis 1, and outdoor exhaust vents 103 and outdoor air inlets 104 are fixedly installed on the left and right sides of the back of the chassis 1, respectively. Exhaust fans 105 are fixedly installed at the connection points between the chassis 1 and the indoor air supply vents 101 and outdoor air inlets 104. A partition 106 is fixedly connected inside the chassis 1. Coarse filter boxes 107 are fixedly installed on the front and rear sides of the chassis 1, and on the left and right sides of the partition 106. A rotary heat exchanger 108, an electrostatic precipitator 109, and a fine filter box 110 are fixedly installed at the rear end of the chassis 1, and in front of the coarse filter box 107. Fresh air enters the casing 1 through the outdoor air inlet 104, while stale indoor air is drawn in through the indoor return air inlet 102. Two sets of exhaust fans 105 drive the airflow. The air first passes through the coarse filter box 107 to remove large particles, then flows through the rotary heat exchanger 108 for heat recovery, then passes through the electrostatic precipitator 109 to remove fine particles, and finally passes through the fine filter box 110 for fine filtration. The treated clean fresh air is delivered into the room through the indoor air outlet 101, while the exhaust airflow is discharged outdoors through the outdoor exhaust outlet 103. Throughout the process, the partition 106 ensures that the fresh air and exhaust airflow are completely isolated, achieving efficient heat exchange while ensuring air cleanliness.

[0023] Both sets of coarse filter boxes 107 have first positioning slots 111 inside, and filter screens 112 are inserted into both first positioning slots 111. Inspection covers 113 are fixedly installed on the tops of the rotary heat exchanger 108 and the electrostatic precipitator 109. The fine filter box 110 has second positioning slots 114 inside, and corrugated HEPA filter membranes 115 are inserted into the second positioning slots 114. The filter screens 112 intercept large particulate pollutants, such as dust, hair, PM10 and larger particles, protecting subsequent precision components and extending equipment life. The corrugated structure of the corrugated HEPA filter membrane 115... The effective filtration area is greatly increased, the wind resistance is reduced, and ultrafine particles are efficiently captured. As a terminal purification barrier, it ensures the cleanliness of the incoming air. When the inside of the casing 1 is inspected, the casing cover 2 is opened first through the locking mechanism 3. The coarse filter box 107 can quickly insert and remove the filter screen 112 through the first positioning slot 111. The inspection cover 113 on the top of the rotary heat exchanger 108 and the electrostatic precipitator 109 can be opened to facilitate internal maintenance. The fine filter box 110 can quickly insert and remove the corrugated HEPA filter membrane 115 through the second positioning slot 114, realizing modular maintenance of the whole system.

[0024] Secondly, the locking mechanism 3 includes a locking head 301 fixedly installed on the top left end of the cover 2; a locking box 302 fixedly connected to the top left end of the chassis 1; locking pins 303 slidably connected to both the front and rear ends inside the locking box 302; operating handles 304 fixedly connected to the inside of the locking box 302 and at opposite ends of the two sets of locking pins 303; a return spring 305 installed inside the locking box 302 and between the two sets of operating handles 304; and a flip cover handle 306 fixedly connected to the top of the locking head 301. All 303 are connected to the locking head 301 through the locking hole 307. When the cover 2 is closed, the locking head 301 is connected to the locking box 302. The two sets of locking pins 303 are inserted into the locking hole 307 under the push of the return spring 305, thus firmly securing the cover 2. When it is necessary to inspect the inside of the chassis 1, the operating handle (304) is pressed inward to make the locking pins 303 retract into the inside of the locking box 302. At this time, the cover 2 can be opened by flipping the cover handle 306, thereby improving the convenience of inspection and maintenance of the chassis 1.

[0025] Finally, the fixing frame 4 consists of two sets of half-frames 401, which are respectively fitted onto the left and right sides of the chassis 1. The two sets of half-frames 401 are fixedly connected by locking screws 402. The top of each set of half-frames 401 is fixedly connected to the movable seat 502 by mounting screws 403. Rubber protective pads 404 are fixedly connected to the inner side of each set of half-frames 401. When installing the fixing frame 4, first, fit the two sets of half-frames 401 onto the left and right sides of the chassis 1, and then fix them with locking screws 402. Then, fix the top of the half-frames 401 to the movable seat 502 with mounting screws 403. Finally, hang the chassis 1 on the ceiling by inserting the corresponding screws into the mounting holes 508. The rubber protective pads 404 not only prevent shock but also prevent direct metal contact, further playing a role in shock absorption and protection.

[0026] In this embodiment, the specific implementation scenario is as follows: First, two sets of half-frames 401 are respectively fitted onto the left and right sides of the chassis 1, and then fixed with locking screws 402. Then, the top of the half-frames 401 is fixed to the movable seat 502 with mounting screws 403. Finally, the chassis 1 is hung on the ceiling by inserting the corresponding screws into the mounting holes 508. When the chassis 1 vibrates during operation, the vibration of the chassis 1 is first transmitted to the shock absorber 5 through the fixed frame 4. Under the action of vibration, the movable seat 502 inside the shock absorber 5 begins to slide up and down along the inside of the shock absorber 5. The damper 503 at the top of the movable seat 502 begins to function, slowing down the movement speed of the movable seat 502 through the damping material inside, thereby reducing the vibration amplitude. At the same time, when the damper 503 extends and retracts, it drives the transmission rod 507 to swing under the connection of the connector 509. The transmission rod 507 pushes the movable sleeve 506 on the outside of the guide rod 504 to compress and dampen the vibration. The spring 505 further absorbs the remaining vibration energy, thus effectively buffering the vibration while quickly restoring a stable state, avoiding excessive noise that could affect the user's life. It also prevents the screws at the mounting plate 501 from loosening due to vibration, thus avoiding the risk of it falling. When inspecting the inside of the casing 1, the cover 2 is opened first through the locking mechanism 3. The coarse filter box 107 allows for quick insertion and removal of the filter screen 112 through the first positioning slot 111. The inspection cover 113 on the top of the rotary heat exchanger 108 and the electrostatic precipitator 109 can be opened for easy internal maintenance. The fine filter box 110 allows for quick insertion and removal of the corrugated HEPA filter membrane 115 through the second positioning slot 114. This enables modular maintenance of the entire system. The entire operation process is simple and convenient. This utility model improves the stability and safety of the fresh air unit through its design, while also improving the convenience of inspection and maintenance.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clean fresh air machine for central air conditioning with heat recovery mechanism, comprising a cabinet (1), characterized in that: The top of the chassis (1) is hinged with a cover (2), and the left end of the cover (2) is fixedly connected to the chassis (1) through a locking mechanism (3). The front and rear ends of the chassis (1) are fixedly installed with fixed frames (4), and the top of the two sets of fixed frames (4) are fixedly installed with shock-absorbing boxes (5). The top of the shock absorber box (5) is fixedly connected to an mounting plate (501), and the bottom of the inside of the shock absorber box (5) is slidably connected to a movable seat (502). A damper (503) is fixedly installed between the top of the movable seat (502) and the shock absorber box (5). Guide rods (504) are fixedly connected to both the left and right ends inside the shock absorber box (5). Buffer springs (505) are sleeved on the outer sides of both sets of guide rods (504). Movable sleeves (506) are slidably connected to the outer sides of both sets of guide rods (504) and at the opposite ends of the two sets of buffer springs (505). Transmission rods (507) are installed between the two sets of movable sleeves (506) and the damper (503). Mounting holes (508) are fixedly installed at both ends of the mounting plate (501). The top ends of the two sets of transmission rods (507) are rotatably connected to the movable sleeve (506). The bottom ends of the two sets of transmission rods (507) are rotatably connected to the outside of the damper (503) through the connector (509). The front and left sides of the chassis (1) are fixedly equipped with an indoor air supply vent (101) and an indoor air return vent (102). The left and right sides of the back of the chassis (1) are fixedly equipped with an outdoor exhaust vent (103) and an outdoor air inlet (104). The connection between the inside of the chassis (1) and the indoor air supply vent (101) and the outdoor air inlet (104) is fixedly equipped with an exhaust fan (105). The inside of the chassis (1) is fixedly connected with a partition (106). The front and rear sides of the chassis (1) and the left and right sides of the partition (106) are fixedly equipped with a coarse filter box (107). The rear end of the inside of the chassis (1) and the front of the coarse filter box (107) are fixedly equipped with a rotary heat exchanger (108), an electrostatic precipitator (109) and a fine filter box (110). Both sets of coarse filter boxes (107) have a first positioning slot (111) inside, and a filter screen (112) is inserted into the inside of both sets of first positioning slots (111). Both the rotary heat exchanger (108) and the electrostatic precipitator (109) are fixedly equipped with inspection covers (113). The fine filter box (110) has a second positioning slot (114) inside, and a corrugated HEPA filter membrane (115) is inserted into the second positioning slot (114). The locking mechanism (3) includes a locking head (301) fixedly installed on the top left end of the cover (2), a locking box (302) fixedly connected to the top left end of the chassis (1), a locking pin (303) slidably connected to both the front and rear ends inside the locking box (302), an operating handle (304) fixedly connected to the inside of the locking box (302) and at the opposite end of the two sets of locking pins (303), and a return spring (305) installed inside the locking box (302) and between the two sets of operating handles (304). The top of the locking head (301) is fixedly connected to a flip cover handle (306), and both sets of locking pins (303) are inserted into the locking head (301) through locking holes (307); The fixed frame (4) consists of two sets of half frames (401). The two sets of half frames (401) are respectively fitted on the left and right sides of the chassis (1). The two sets of half frames (401) are fixedly connected by locking screws (402). The top of the two sets of half frames (401) is fixedly connected to the movable seat (502) by mounting screws (403). The inner side of the two sets of half frames (401) is fixedly connected with rubber protective pads (404).

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