Fresh air heat recovery all-in-one machine and using method thereof

Abstract

The invention discloses a fresh air heat recovery all-in-one machine and a using method thereof. The fresh air heat recovery all-in-one machine is characterized in that a vertical partition plate is fixedly installed at the inner side end of an outer machine shell, a transverse partition plate also located in the outer machine shell is fixedly installed in the middle of the outer side of the vertical partition plate, a mounting frame is installed at the lower end of the inner side of the outer machine shell, and a suction fan is arranged in the right end of the mounting frame; a mounting frame is mounted in the middle of the inner side of the outer machine shell, and sealing positioning blocks are fixedly mounted at the upper end and the lower end of the inner side of the mounting frame correspondingly. The invention belongs to the technical field of fresh air heat recovery all-in-one machines, and aims to solve the problems that in the prior art, a rhombic heat exchange core body is not sufficiently utilized, and the daily maintenance and disassembly processes after installation are tedious due to the fact that the rhombic heat exchange core body is mostly integrally arranged. The rhombic heat exchange core has the technical effects that the rhombic heat exchange core body can be fully utilized conveniently, and daily maintenance and disassembly can be conveniently and rapidly carried out after installation due to the fact that the interior is arranged in a modularized mode.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air heat recovery integrated machine, and in particular to a fresh air heat recovery integrated machine and a use method thereof. Background Art

[0002] Fresh air heat recovery integrated machine is a device that introduces fresh air from the outside and exchanges heat with indoor return air in a heat exchange device after passing through a filtering device, thereby increasing the fresh air temperature and reducing indoor energy consumption. This device can not only introduce fresh air from the outside, but also greatly reduce energy consumption, environmental protection and energy saving. With the increasing awareness of air quality improvement, its development and popularization speed is accelerating. The traditional fresh air heat recovery integrated machine generally includes a suction fan, an exhaust fan and a diamond-shaped heat exchange core body. The diamond-shaped heat exchange core body can make the air discharged from the outside and the fresh air introduced into the room exchange heat without mixing;

[0003] However, most fresh air heat recovery integrated machines do not fully utilize the diamond-shaped heat exchange core body, and are mostly integrated, resulting in cumbersome daily maintenance and disassembly processes after installation. Once a component fails, it needs to be disassembled and replaced as a whole, which greatly increases maintenance costs and time and is extremely inconvenient. Summary of the invention

[0004] To this end, the present invention provides a fresh air heat recovery integrated machine and a use method thereof to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] According to a first aspect of the present invention, a fresh air heat recovery integrated machine and a method of using the same include:

[0007] A vertical partition is fixedly installed on the inner end of the outer casing, and a horizontal partition also located in the outer casing is fixedly installed on the middle part of the outer side of the vertical partition. A mounting frame is installed on the inner lower end of the outer casing, and a suction fan is arranged inside the right end of the mounting frame, and an exhaust fan is arranged inside the left end of the mounting frame;

[0008] A mounting frame is installed in the middle of the inner side of the outer casing, and sealing positioning blocks are fixedly installed at the upper and lower ends of the inner side of the mounting frame, and the inner side of the sealing positioning blocks is connected to a diamond-shaped heat exchange core body also located in the mounting frame. A fixing plate is fixedly installed inside the mounting frame, and a guide plate is installed on the inner side of the fixing plate through a rotating shaft, and a transmission gear is fixedly arranged at the outer rear end of the rotating shaft;

[0009] Transmission racks are respectively installed on the left and right sides of the lower end of the diamond-shaped heat exchange core body, and the outer side of the lower end of the transmission rack is integrally fixedly connected with a limit plate, and the outer side of the limit plate is penetrated and connected with a connecting frame located in the sealing positioning block.

[0010] Furthermore, a fixed side panel is fixedly installed on the outer side of the front end of the outer casing by screws, and the lower right end of the outer casing is connected to an air intake duct, and the upper right end of the outer casing is connected to an air exhaust duct, and the mounting frame and the mounting bracket are connected to the outer casing in a plug-in manner.

[0011] Furthermore, an air suction outlet duct is connected to the upper left end of the outer casing, and an air exhaust inlet duct located directly below the air suction outlet duct is installed at the lower left end of the outer casing, and the exhaust inlet duct is located on the left side of the exhaust fan.

[0012] Furthermore, a folding tube is fixedly installed inside the vertical partition through screws, and a connecting joint is rotatably installed inside one end of the folding tube close to the central axis of the outer casing, and a spring connected to the vertical partition is arranged on the outside of the folding tube.

[0013] Furthermore, a connection frame is provided in a snap-fitted manner inside the right side of the mounting frame, and a filter assembly is provided inside the connection frame, and the filter aperture size of the filter assembly increases sequentially from left to right.

[0014] Furthermore, connecting pipes are provided on the outer sides of the left and right walls of the installation frame, and the connecting pipes are connected to the connecting joints by means of threads, and the connecting pipes and the folding pipes are provided in a one-to-one correspondence.

[0015] Furthermore, the guide plates are arranged at equal intervals on the lower left outer side and the lower right outer side of the rhombus heat exchange core body, and the transmission gears and the guide plates are arranged in a one-to-one correspondence.

[0016] Furthermore, the transmission gear and the transmission rack are connected in a meshing manner, and the transmission rack and the limit plate are respectively connected to the sealing positioning block in a sliding manner, and the transmission rack is arranged in an inclined manner.

[0017] Furthermore, the limit plate is connected to the connecting frame in a sliding manner, and an adjusting bolt that penetrates the sealing positioning block is installed on the outer side of the lower end of the connecting frame through a bearing.

[0018] Furthermore, the method of using the method is as follows:

[0019] Step 1: Rotate the screws to make the screws lose their fixing effect on the fixed side panels, and then insert the installation frame into the outer casing. At this time, the connecting tubes and the folding tubes correspond to each other and are aligned. Then rotate the connecting joint to make the connecting joint and the connecting tube threadedly connected, so that the folding tube and the connecting tube are connected, which is convenient for air to enter and exit the installation frame;

[0020] Step 2: Insert the exhaust fan and suction fan into the left and right sides of the lower end of the outer casing through the mounting bracket, so as to facilitate the corresponding installation of the exhaust fan and suction fan with the exhaust air inlet pipe and the suction air inlet pipe. After the installation is completed, fix the fixed side panels with screws, and then install the whole, and connect the suction air inlet pipe, suction air outlet pipe, exhaust air inlet pipe and exhaust air outlet pipe to the external pipe respectively;

[0021] Step 3: When in use, start the suction fan and the exhaust fan respectively. The suction fan can suck the fresh air that is about to enter the room into the outer casing through the suction air inlet pipe. At this time, the filter component can filter the sucked air to remove particulate matter and pollutants in the air and ensure the cleanliness and health of the indoor air. The filtered air can enter the installation frame through the folding pipe and the connecting pipe on the left side of the suction fan, enter the diamond heat exchange core body from the lower right side of the diamond heat exchange core body, pass through the diamond heat exchange core body, and pass out from the upper left side of the diamond heat exchange core body, and then be discharged from the suction air outlet pipe through the connecting pipe and the folding pipe;

[0022] Step 4: The exhaust fan can suck the indoor air into the outer casing through the exhaust air inlet pipe, and enter the installation frame through the folded pipe and the connecting pipe located on the right side of the exhaust fan, and enter the diamond heat exchange core body from the lower left of the diamond heat exchange core body, and pass through the diamond heat exchange core body, and pass out from the upper right of the diamond heat exchange core body, and then be discharged from the exhaust air outlet pipe through the connecting pipe and the folded pipe. The fresh air that is about to enter the room and the air that is about to be discharged from the outside enter the diamond heat exchange core body at the same time, and convection heat exchange occurs in a non-mixed state, so that part of the heat in the indoor air is transferred to the fresh air, thereby increasing the temperature of the fresh air in the diamond heat exchange core body, improving heat recovery and utilization, and reducing energy consumption;

[0023] Step 5: The guide plate has a good guiding effect on the indoor fresh air entering the diamond-shaped heat exchange core body and the air to be discharged to the outside, so that the indoor fresh air and the air to be discharged to the outside can enter the diamond-shaped heat exchange core body evenly to ensure the heat exchange effect. After using it for a period of time, the adjusting bolt can be rotated to make the adjusting bolt and the sealing positioning block threadedly connected. At this time, the adjusting bolt rotates with the connecting frame through the bearing, so that the adjusting bolt can drive the connecting frame to move downward. With the movement of the connecting frame, the two sets of limit plates and the connecting frame slide relative to each other and drive the transmission rack to move downward, so that the transmission rack and the transmission gear are meshed and connected, driving the transmission gear and the rotating shaft to rotate, so as to facilitate the adjustment of the angle of the guide plate, so that the indoor fresh air and the air to be discharged to the outside can enter the diamond-shaped heat exchange core body evenly from different angles, so as to make full use of the diamond-shaped heat exchange core body.

[0024] The present invention has the following advantages:

[0025] 1. Through the guide plate, it is convenient to adjust the angle of the guide plates on both sides of the lower end of the diamond heat exchange core body by rotating the adjustment bolts, so that the fresh air in the room and the air to be discharged from the outside can enter the diamond heat exchange core body evenly from different angles, so as to make full use of the diamond heat exchange core body;

[0026] 2. The internal space of the outer casing is divided into modules through the installation frame and the installation rack, and the vertical partitions and the horizontal partitions. Then, the diamond-shaped heat exchange core body, the suction fan and the exhaust fan are installed in modules through the installation frame and the installation rack, so that daily maintenance and disassembly are more convenient after installation.

[0027] 3. Through the guide plates, the guide plates are arranged at equal intervals on the lower left outer side and the lower right outer side of the diamond-shaped heat exchange core body. The guide plates are installed on the inner side of the fixed plate under the action of the rotating shaft, so that the guide plates have a good guiding effect on the indoor fresh air entering the diamond-shaped heat exchange core body and the air to be discharged to the outside, so that the indoor fresh air and the air to be discharged to the outside can enter the diamond-shaped heat exchange core body evenly, ensuring the effect of heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A front cross-sectional view of a fresh air heat recovery integrated machine and a method of using the same provided in some embodiments of the present invention.

[0029] Figure 2 A side cross-sectional view of a fresh air heat recovery integrated machine and a method of using the same provided in some embodiments of the present invention.

[0030] Figure 3 A front cross-sectional view of the connection between a transmission gear and a transmission rack of a fresh air heat recovery integrated machine and a method of using the same provided in some embodiments of the present invention.

[0031] Figure 4 A fresh air heat recovery integrated machine and a method of using the same are provided in some embodiments of the present invention Figure 1 Enlarged view of point A in the middle.

[0032] Figure 5 A side view of the connection between a guide plate and a transmission gear of a fresh air heat recovery integrated machine and a method of using the same provided in some embodiments of the present invention.

[0033] In the figure: 1, outer casing, 2, fixed side panel, 3, vertical partition, 4, horizontal partition, 5, suction air inlet duct, 6, suction air outlet duct, 7, exhaust air inlet duct, 8, exhaust air outlet duct, 9, mounting frame, 10, limit block, 11, suction fan, 12, exhaust fan, 13, connecting frame, 14, filter assembly, 15, folding tube, 16, connecting joint, 17, spring, 18, mounting frame, 19, connecting pipe, 20, sealing positioning block, 21, diamond heat exchange core body, 22, fixed plate, 23, guide plate, 24, transmission gear, 25, transmission rack, 26, limit plate, 27, connecting frame, 28, adjusting bolt. DETAILED DESCRIPTION

[0034] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figures 1 to 5 As shown, a fresh air heat recovery integrated machine and a method of using the same in an embodiment of the first aspect of the present invention include: a vertical partition 3 is fixedly installed on the inner end of an outer casing 1, and a transverse partition 4 which is also located in the outer casing 1 is fixedly installed in the middle of the outer side of the vertical partition 3, so as to facilitate modular division of the internal space of the outer casing 1 by means of the vertical partition 3 and the transverse partition 4, a fixed side panel 2 is fixedly installed on the outer side of the front end of the outer casing 1 by means of screws, and the screws are rotated so that the screws lose their fixing effect on the fixed side panel 2, so as to facilitate the subsequent modular assembly of the suction fan 11, the exhaust fan 12 and the installation frame 18, and the installation frame 18 is installed in the middle of the inner side of the outer casing 1. A mounting frame 9 is installed at the lower end of the side, and a suction fan 11 is arranged inside the right end of the mounting frame 9, and an exhaust fan 12 is arranged inside the left end of the mounting frame 9. The mounting frame 18 and the mounting frame 9 are connected to the outer casing 1 in a plug-in manner. During installation, the mounting frame 18 can be inserted into the inner ends of the two groups of vertical partitions 3, and then the mounting frame 9 is inserted into the lower end of the outer casing 1, so that the limit blocks 10 fixedly installed at the outer ends of the mounting frame 9 slide with the vertical partitions 3 and the horizontal partitions 4 respectively, so as to facilitate better positioning and installation of the mounting frame 9, and then facilitate the installation of the suction fan 11 and the exhaust fan 12, so that the whole can be installed in a modular manner, which is convenient for subsequent disassembly and maintenance;

[0037] The folding tube 15 is fixedly arranged inside the vertical partition 3 by screws, and a connecting joint 16 is rotatably installed inside one end of the folding tube 15 close to the central axis of the outer casing 1, and a spring 17 connected to the vertical partition 3 is arranged on the outside of the folding tube 15. The outsides of the left and right walls of the installation frame 18 are both connected with connecting tubes 19, and the connecting tubes 19 are connected to the connecting joints 16 in a threaded manner, and the connecting tubes 19 and the folding tubes 15 are arranged one by one. When installing, the installation frame 18 is inserted into the interior of the outer casing 1, and at this time, the connecting tubes 19 and the folding tubes 15 are connected. The stacked tubes 15 correspond to each other and are aligned, and then the connecting joint 16 is rotated to make the connecting joint 16 and the connecting tube 19 threadedly connected, so that the folded tube 15 and the connecting tube 19 are connected, which is convenient for air to enter and exit the installation frame 18. At this time, the spring 17 is stretched. When the installation frame 18 needs to be disassembled and maintained later, the connecting joint 16 can be rotated in the opposite direction to separate the connecting joint 16 from the connecting tube 19. At this time, the spring 17 contracts and drives the connecting joint 16 away from the connecting tube 19 to avoid the connecting joint 16 blocking the disassembly of the connecting tube 19;

[0038] The lower right end of the outer casing 1 is connected with an air suction inlet pipe 5, the upper left end of the outer casing 1 is connected with an air suction outlet pipe 6, and the lower left end of the outer casing 1 is installed with an exhaust air inlet pipe 7 located directly below the air suction outlet pipe 6, and the exhaust air inlet pipe 7 is located on the left side of the exhaust fan 12, and the upper right end of the outer casing 1 is connected with an exhaust air outlet pipe 8. After the installation is completed, the fixed side panel 2 is fixed by screws, and then the whole is installed, and the air suction inlet pipe 5, the air suction outlet pipe 6, the exhaust air inlet pipe 7 and the exhaust air outlet pipe 8 are respectively connected to the external pipeline, and the installation is completed. A connection frame 13 is provided inside the right side of the frame 9, and a filter assembly 14 is provided inside the connection frame 13, and the filter aperture size of the filter assembly 14 increases from left to right. The connection frame 13 has a good installation effect on the filter assembly 14. When in use, the suction fan 11 and the exhaust fan 12 are started respectively, and the suction fan 11 can suck the fresh air about to enter the room into the outer housing 1 through the suction air inlet pipe 5. At this time, the filter assembly 14 can filter the sucked air, so as to remove particulate matter and pollutants in the air and ensure the cleanliness and health of the indoor air.

[0039] The sealing positioning blocks 20 are fixedly installed at the upper and lower ends of the inner side of the installation frame 18, and the inner side of the sealing positioning blocks 20 is connected to the rhombus-shaped heat exchange core body 21 which is also located in the installation frame 18. The rhombus-shaped heat exchange core body 21 is installed in the installation frame 18 through the sealing positioning blocks 20. The filtered air can enter the installation frame 18 through the folding tube 15 and the connecting tube 19 located on the left side of the suction fan 11, and enter the rhombus-shaped heat exchange core body 21 from the lower right side of the rhombus-shaped heat exchange core body 21 under the action of the sealing positioning blocks 20, and pass through the rhombus-shaped heat exchange core body 21, and pass out from the upper left side of the rhombus-shaped heat exchange core body 21, and then be discharged from the suction outlet duct 6 through the connecting tube 19 and the folding tube 15. At the same time, the exhaust fan 12 can ventilate the indoor air. The air is sucked into the outer casing 1 through the exhaust air inlet pipe 7, and enters the installation frame 18 through the folded pipe 15 and the connecting pipe 19 located on the right side of the exhaust fan 12, and enters the diamond heat exchange core body 21 from the lower left of the diamond heat exchange core body 21, passes through the diamond heat exchange core body 21, and passes out from the upper right of the diamond heat exchange core body 21, and then is discharged from the exhaust air outlet pipe 8 through the connecting pipe 19 and the folded pipe 15, so that the fresh air about to enter the room and the air about to be discharged outdoors enter the diamond heat exchange core body 21 at the same time, and convection heat exchange occurs in a non-mixed state, so that part of the heat in the indoor air is transferred to the fresh air, the temperature of the fresh air in the diamond heat exchange core body 21 is increased, the heat recovery is improved, and the energy consumption is reduced;

[0040] A fixing plate 22 is fixedly installed inside the mounting frame 18, and a guide plate 23 is installed on the inner side of the fixing plate 22 through a rotating shaft, and a transmission gear 24 is fixedly installed on the outer rear end of the rotating shaft. The guide plates 23 are respectively arranged at equal intervals on the lower left outer side and the lower right outer side of the diamond-shaped heat exchange core body 21, and the transmission gear 24 and the guide plates 23 are arranged one by one. The guide plates 23 are installed on the inner side of the fixing plate 22 under the action of the rotating shaft, so that the guide plates 23 have a good guiding effect on the indoor fresh air entering the diamond-shaped heat exchange core body 21 and the air to be discharged outdoors, so that the indoor fresh air and the air to be discharged outdoors can evenly enter the diamond-shaped heat exchange core body 21, ensuring the effect of heat exchange;

[0041] The transmission rack 25 is respectively installed on the left and right sides of the lower end of the diamond-shaped heat exchange core body 21, and the outer side of the lower end of the transmission rack 25 is integrally fixedly connected with the limit plate 26, and the outer side of the limit plate 26 is penetrated and connected with a connecting frame 27 located in the sealing positioning block 20, and the limit plate 26 and the transmission rack 25 are arranged one by one. The connecting frame 27 has a good transmission and support effect on the transmission rack 25 and the limit plate 26. The transmission gear 24 is connected to the transmission rack 25 in a meshing manner, and the transmission rack 25 and the limit plate 26 are respectively connected to the sealing positioning block 20 in a sliding manner, and the transmission rack 25 is inclined, and the outer side of the lower end of the connecting frame 27 is installed with an adjusting bolt 28 that penetrates the sealing positioning block 20 through a bearing. After a period of use, the adjusting bolt 28 can be rotated to adjust the adjusting bolt 28. It is threadedly connected with the sealing positioning block 20. At this time, the adjusting bolt 28 rotates and moves downward through the bearing and the connecting frame 27, so that the adjusting bolt 28 can drive the connecting frame 27 to move downward synchronously. As the connecting frame 27 moves, the two sets of limit plates 26 slide relative to the connecting frame 27 and drive the transmission rack 25 to move downward. At this time, the transmission rack 25 slides with the mounting frame 18 and the sealing positioning block 20 respectively, so that the transmission rack 25 is meshed and connected with the transmission gear 24, driving the transmission gear 24 and the rotating shaft to rotate, thereby facilitating the simultaneous adjustment of the angles of the guide plates 23 outside the lower ends of the diamond-shaped heat exchange core body 21, so that the fresh air in the room and the air to be discharged outdoors enter the diamond-shaped heat exchange core body 21 evenly from different angles, so as to make full use of the diamond-shaped heat exchange core body 21.

Claims

1. A fresh air heat recovery integrated machine, characterized in that: include: A vertical partition (3) is fixedly mounted on the inner end of the outer casing (1), and a horizontal partition (4) which is also located in the outer casing (1) is fixedly mounted on the middle part of the outer side of the vertical partition (3); a mounting frame (9) is mounted on the inner lower end of the outer casing (1), and a suction fan (11) is arranged inside the right end of the mounting frame (9), and an exhaust fan (12) is arranged inside the left end of the mounting frame (9); A mounting frame (18) is installed in the middle of the inner side of the outer casing (1), and sealing positioning blocks (20) are fixedly installed at the upper and lower ends of the inner side of the mounting frame (18), and the inner side of the sealing positioning block (20) is connected to a diamond-shaped heat exchange core body (21) also located in the mounting frame (18), and a fixing plate (22) is fixedly installed inside the mounting frame (18), and a guide plate (23) is installed on the inner side of the fixing plate (22) via a rotating shaft, and a transmission gear (24) is fixedly arranged at the outer rear end of the rotating shaft; Transmission racks (25) are respectively installed on the left and right sides of the lower end of the diamond-shaped heat exchange core body (21), and the outer side of the lower end of the transmission rack (25) is integrally fixedly connected to a limit plate (26), and the outer side of the limit plate (26) is penetrated and connected to a connecting frame (27) located in the sealing positioning block (20).

2. The fresh air heat recovery integrated machine according to claim 1, characterized in that: A fixed side plate (2) is fixedly mounted on the outer front end of the outer casing (1) by means of screws, and an air intake duct (5) is connected to the lower right end of the outer casing (1), and an air exhaust duct (8) is connected to the upper right end of the outer casing (1), and both the mounting frame (18) and the mounting bracket (9) are connected to the outer casing (1) by means of plugging.

3. The fresh air heat recovery integrated machine according to claim 2, characterized in that: The upper left end of the outer casing (1) is connected to an air suction outlet pipe (6), and the lower left end of the outer casing (1) is provided with an exhaust air inlet pipe (7) located directly below the air suction outlet pipe (6), and the exhaust air inlet pipe (7) is located on the left side of the exhaust fan (12).

4. The fresh air heat recovery integrated machine according to claim 1, characterized in that: A folding tube (15) is fixedly provided inside the vertical partition (3) by means of screws, and a connecting joint (16) is rotatably installed inside one end of the folding tube (15) close to the central axis of the outer casing (1), and a spring (17) connected to the vertical partition (3) is provided on the outside of the folding tube (15).

5. The fresh air heat recovery integrated machine according to claim 4, characterized in that: A connection frame (13) is provided in engagement with the right interior of the mounting frame (9), and a filter assembly (14) is provided inside the connection frame (13), and the filter aperture size of the filter assembly (14) increases sequentially from left to right.

6. The fresh air heat recovery integrated machine according to claim 4, characterized in that: The outer sides of the left and right walls of the installation frame (18) are both connected with connecting pipes (19), and the connecting pipes (19) are connected to the connecting joints (16) in a threaded manner, and the connecting pipes (19) and the folding pipes (15) are arranged in a one-to-one correspondence.

7. The fresh air heat recovery integrated machine according to claim 1, characterized in that: The guide plates (23) are arranged at equal intervals on the lower left outer side and the lower right outer side of the rhombus-shaped heat exchange core body (21), and the transmission gears (24) and the guide plates (23) are arranged in a one-to-one correspondence.

8. The fresh air heat recovery integrated machine according to claim 7, characterized in that: The transmission gear (24) and the transmission rack (25) are connected in a meshing manner, and the transmission rack (25) and the limit plate (26) are respectively connected to the sealing positioning block (20) in a sliding manner, and the transmission rack (25) is arranged in an inclined manner.

9. The fresh air heat recovery integrated machine according to claim 8, characterized in that: The limit plate (26) is connected to the connecting frame (27) in a sliding manner, and an adjusting bolt (28) penetrating the sealing positioning block (20) is installed on the outer side of the lower end of the connecting frame (27) through a bearing.

10. The fresh air heat recovery integrated machine according to claim 1, characterized in that: The specific method of use is as follows: Step 1: Rotate the screws to make the screws lose their fixing effect on the fixed side plate (2), and then insert the installation frame (18) into the interior of the outer casing (1). At this time, the connecting tube (19) and the folding tube (15) correspond to each other and are aligned. Then rotate the connecting joint (16) to make the connecting joint (16) and the connecting tube (19) threadedly connected, so that the folding tube (15) and the connecting tube (19) are connected, so that air can enter and exit the installation frame (18); Step 2: Insert the exhaust fan (12) and the suction fan (11) into the left and right sides of the lower end of the outer casing (1) through the mounting bracket (9), so as to facilitate the installation of the exhaust fan (12) and the suction fan (11) corresponding to the exhaust air inlet pipe (7) and the suction air inlet pipe (5). After the installation is completed, fix the fixed side plate (2) with screws, and then install the whole, and respectively connect the suction air inlet pipe (5), the suction air outlet pipe (6), the exhaust air inlet pipe (7) and the exhaust air outlet pipe (8) to the external pipeline; Step 3: When in use, the suction fan (11) and the exhaust fan (12) are started respectively. The suction fan (11) can suck the fresh air that is about to enter the room into the outer casing (1) through the suction air inlet pipe (5). At this time, the filter assembly (14) can filter the sucked air to remove particulate matter and pollutants in the air and ensure the cleanliness and health of the indoor air. The filtered air can enter the installation frame (18) through the folding tube (15) and the connecting tube (19) located on the left side of the suction fan (11), enter the diamond heat exchange core body (21) from the lower right side of the diamond heat exchange core body (21), pass through the diamond heat exchange core body (21), pass out from the upper left side of the diamond heat exchange core body (21), and then be discharged from the suction air outlet pipe (6) through the connecting tube (19) and the folding tube (15); Step 4: The exhaust fan (12) can suck the indoor air into the outer casing (1) through the exhaust air inlet pipe (7), and enter the installation frame (18) through the folding pipe (15) and the connecting pipe (19) located on the right side of the exhaust fan (12), and enter the diamond-shaped heat exchange core body (21) from the lower left side of the diamond-shaped heat exchange core body (21), and pass through the diamond-shaped heat exchange core body (21), and pass out from the upper right side of the diamond-shaped heat exchange core body (21), and then be discharged from the exhaust air outlet pipe (8) through the connecting pipe (19) and the folding pipe (15). The fresh air that is about to enter the room and the air that is about to be discharged outdoors enter the diamond-shaped heat exchange core body (21) at the same time, and convective heat exchange occurs in a non-mixed state, so that part of the heat in the indoor air is transferred to the fresh air, thereby increasing the temperature of the fresh air in the diamond-shaped heat exchange core body (21), improving the heat recovery and utilization, and reducing energy consumption; Step 5: The guide plate (23) has a good guiding effect on the indoor fresh air entering the diamond-shaped heat exchange core body (21) and the air to be discharged to the outside, so that the indoor fresh air and the air to be discharged to the outside can be uniformly entered into the diamond-shaped heat exchange core body (21), ensuring the heat exchange effect. After a period of use, the adjusting bolt (28) can be rotated to make the adjusting bolt (28) and the sealing positioning block (20) threadedly connected. At this time, the adjusting bolt (28) rotates through the bearing and the connecting frame (27), so that the adjusting bolt (28) can drive The connecting frame (27) moves downward. As the connecting frame (27) moves, the two groups of limit plates (26) slide relative to the connecting frame (27) and drive the transmission rack (25) to move downward, so that the transmission rack (25) is meshed with the transmission gear (24), driving the transmission gear (24) and the rotating shaft to rotate, thereby facilitating the adjustment of the angle of the guide plate (23), so that fresh air in the room and air to be discharged outdoors can evenly enter the rhombus-shaped heat exchange core body (21) from different angles, so that the rhombus-shaped heat exchange core body (21) can be fully utilized.

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