Fresh air exchanger with stable air output

Abstract

The application relates to the field of ventilation technology and discloses a fresh air exchanger with stable air output, which comprises a cleaning mechanism arranged on an end plate and located on the other side of the end face of a fluid channel of the end plate; the cleaning mechanism comprises a moving part and a cleaning part, the moving direction of the moving part is perpendicular to the end plate, and the cleaning part is arranged on the moving end of the moving part; the cleaning part is controlled to move on the end face of the fluid channel by the moving part, cleaning of the plate heat exchanger is realized, and the problem of unstable air output caused by filter core pollution is avoided; the cleaning mechanism is added in the traditional fresh air exchanger, and the problem of heat exchange efficiency reduction caused by filter core pollution is solved. The cleaning mechanism can effectively clean the plate heat exchanger regularly, prevents dust and harmful particulate matters from accumulating, ensures long-term and efficient operation of the equipment, maintains stable air output, and improves indoor air quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ventilation technology, in particular to a fresh air exchanger with stable air output. BACKGROUND

[0002] Traditional fresh air exchangers often face problems such as filter core blockage, pipe blockage, unstable air output and air quality fluctuations due to changes in external environment in actual application. Therefore, an innovative energy-saving and environmentally friendly air circulation device for office building interior decoration is proposed in a patent application (application number CN202411091132.X). The device is specially designed with a partition self-cleaning mechanism to maintain the heat exchange filter core, significantly reducing the performance decline caused by adhering dust and harmful particles, ensuring stable operation and efficient work of the equipment.

[0003] It is worth noting that this device uses a rotary heat exchanger as its core component. This type of heat exchanger uses a slow rotation design, making the cleaning process more convenient and efficient, as the rotation feature helps the cleaning tool cover all surfaces of the heat exchanger more evenly, achieving comprehensive cleaning.

[0004] However, in the field of fresh air exchangers, plate-type heat exchangers are also common. Unlike rotary heat exchangers, plate-type heat exchangers do not have rotation function, and the cleaning mechanism cannot effectively move and cover the surface, making it difficult to achieve comprehensive and thorough cleaning of the entire filter core. This limitation makes fresh air exchangers using plate-type heat exchangers prone to filter core pollution, heat exchange efficiency decline and other problems in long-term operation, affecting the stable operation of the equipment and the continuous protection of air quality, ultimately still leading to the emergence of traditional problems such as unstable air output and air quality fluctuations. SUMMARY

[0005] Therefore, the present application aims to provide a fresh air exchanger with stable air output to solve the problems existing in the background art.

[0006] To solve the above technical problems, the technical solution of the present application is a fresh air exchanger with stable air output, which comprises a plate-type heat exchanger having a fluid passage end face and an end plate, and a cleaning mechanism arranged on the end plate and on the other side of the end plate opposite to the fluid passage end face; the cleaning mechanism comprises a moving part and a cleaning part, the moving direction of the moving part is perpendicular to the end plate, and the cleaning part is arranged on the moving end of the moving part; the cleaning part is controlled by the moving part to move on the fluid passage end face, achieving cleaning of the plate-type heat exchanger and avoiding the problem of unstable air output caused by filter core pollution.

[0007] As preferred, the moving end of the moving part is a flexible transmission element, and the cleaning part is fixedly arranged on the flexible transmission element; both ends of the flexible transmission element are respectively provided with a work tray and a reset tray, both of which are used for winding and releasing the flexible transmission element, and the winding action and the releasing action of the work tray and the reset tray are opposite; when the work tray releases the flexible transmission element, the reset tray winds the flexible transmission element, and the cleaning part is driven by the flexible transmission element to perform cleaning work on the fluid passage end face; when the work tray winds the flexible transmission element, the reset tray releases the flexible transmission element, and the cleaning part is reset by the flexible transmission element to avoid affecting the normal operation of the fresh air exchanger.

[0008] Further, the cleaning mechanism has a shell, and the work tray and the reset tray are arranged in the shell to avoid the work tray and the reset tray being contaminated, and the shell is provided with a work hole and a reset hole; the flexible transmission element connects the work tray and the cleaning part through the work hole, and the flexible transmission element connects the reset tray and the cleaning part through the reset hole; the flexible transmission element between the work hole and the cleaning part and the flexible transmission element between the reset hole and the cleaning part are always in the same plane, and the plane is perpendicular to the fluid passage end face, thereby reducing the influence of the flexible transmission element on the airflow activity of the fresh air exchanger during operation.

[0009] Further, the fresh air exchanger is provided with a limiting piece for fixing and installing the plate heat exchanger, the limiting piece is arranged at the end corner of the plate heat exchanger and is perpendicular to the end plate, the cleaning mechanism has a first guide piece, a second guide piece and a steering wheel acting on the flexible transmission element, the first guide piece and the second guide piece are arranged on the shell, and the steering wheel is arranged at one end of the limiting piece away from the shell; the flexible transmission element is led out from the work hole, turns over the transmission direction under the action of the steering wheel after passing through the first guide piece, and then enters the reset hole after passing through the second guide piece; the flexible transmission element between the first guide piece and the steering wheel and the flexible transmission element between the steering wheel and the second guide piece are parallel to the fluid passage end face; and the cleaning part is ensured to move stably under the action of the flexible transmission element.

[0010] Further, the cleaning component is located below the first guide and the second guide wheel to avoid the movement of the cleaning component being blocked; one of the flexible transmission elements between the first guide and the turning wheel and between the turning wheel and the second guide is fixedly connected with the cleaning component, and the other flexible transmission element is slidably connected with the cleaning component, so that stable traction and flexible adjustment of the cleaning component during movement are realized.

[0011] Further, the moving component comprises a bevel gear transmission assembly for driving the working material tray and the reset material tray to rotate, the bevel gear transmission assembly comprises a first bevel gear, a second bevel gear and a third bevel gear, the first bevel gear and the second bevel gear are arranged in mirror image, and the third bevel gear is engaged with the first bevel gear and the second bevel gear respectively; under the action of the third bevel gear, the rotating directions of the first bevel gear and the second bevel gear are opposite; the working material tray and the reset material tray are arranged on the first bevel gear and the second bevel gear respectively, so that the winding action and the releasing action of the flexible transmission element by the working material tray and the reset material tray are opposite under the condition that the walking directions of the working material tray and the reset material tray are the same, and stable traction of the flexible transmission element is ensured.

[0012] Further, the fluid passage end faces are fresh air inlet end face, fresh air outlet end face, exhaust air inlet end face and exhaust air outlet end face respectively, and each of the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face is provided with a separate cleaning component, the length direction of the cleaning component is parallel to the moving direction of the moving component, and the flexible transmission elements are arranged at both ends of the length direction of the cleaning component, so that stable traction and flexible adjustment of the cleaning component during movement are ensured.

[0013] Further, when the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face are adjacent to each other, the adjacent flexible transmission elements on different cleaning components are driven by the same bevel gear transmission assembly.

[0014] Further, when the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face are adjacent to each other, the adjacent flexible transmission elements on different cleaning components are driven by the same bevel gear transmission assembly.

[0015] The technical effects of the present application mainly embody in the following aspects:

[0016] By adding a cleaning mechanism in a traditional fresh air exchanger, the problem of heat exchange efficiency decline caused by filter pollution is solved. The cleaning mechanism can effectively clean the plate heat exchanger regularly, prevent dust and harmful particulate matter from accumulating, ensure long-term efficient operation of the equipment, maintain stable air output and improve indoor air quality.

[0017] The flexible transmission element is used as the moving end of the moving part, which adapts to the changes of the surface of the plate heat exchanger, ensuring the consistency of the cleaning effect. At the same time, through the cooperative work of the work tray and the reset tray, the automatic extension and retraction of the cleaning part is realized, avoiding the influence on the normal operation of the equipment. At the same time, by introducing the first guide, the second guide and the steering wheel combination, the spatial steering and tension adjustment of the flexible transmission element are realized, improving the accuracy and execution efficiency of the cleaning path; at the same time, the connection mode of "one end fixed and one end sliding" is adopted between the cleaning part and the flexible transmission element, which not only ensures the stable output of traction force, but also gives the cleaning part certain adaptive ability, enhancing the robustness of the system.

[0018] The bevel gear transmission assembly is used to drive the work tray and the reset tray, realizing stable traction and direction coordination control of the flexible transmission element during the operation process. Through the interaction of the first and second bevel gears and the third bevel gear at the center position, a complementary transmission mechanism of "one extension and one retraction" is formed, ensuring the reliability of the cleaning part moving along the predetermined path. At the same time, independent cleaning parts are arranged on different end faces, and according to the relative position relationship (adjacent or non-adjacent) between the end faces, the same or independent bevel gear transmission assemblies are selected for driving. This flexible design not only takes into account the differences in cleaning needs, but also realizes effective use of resources, improving the performance and economy of the overall system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural diagram of the present application;

[0020] Figure 2 is Figure 1 a structural diagram of the plate heat exchanger;

[0021] Figure 3 is Figure 1 a cooperation structure diagram of the plate heat exchanger and the cleaning mechanism;

[0022] Figure 4 is Figure 1 a local structure diagram of the cooperation of the plate heat exchanger and the cleaning mechanism;

[0023] Figure 5 is Figure 1 a structural diagram of the bevel gear transmission assembly;

[0024] Figure 6Position distribution diagram of the bevel gear transmission assembly for fluid passage end face using adjacent surfaces;

[0025] Figure 7 Position distribution diagram of the bevel gear transmission assembly for fluid passage end face using non-adjacent surfaces;

[0026] In the figure: 1, fresh air fan; 2, exhaust fan; 3, plate heat exchanger, 31, fluid passage end face, 311, fresh air inlet end face, 312, fresh air outlet end face, 313, exhaust air inlet end face, 314, exhaust air outlet end face; 32, end plate; 4, limiting piece; 5, cleaning mechanism, 51, moving part, 511, flexible transmission element, 512, work tray, 513, reset tray; 52, cleaning part; 53, shell, 531, work hole, 532, reset hole, 533, first guide, 534, second guide, 535, steering wheel; 54, bevel gear transmission assembly, 541, first bevel gear, 542, second bevel gear, 543, third bevel gear. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings. In the embodiments, it should be understood that the terms "intermediate", "upper", "lower", "top", "right side", "left end", "upper", "back", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the present specific embodiments, if the connection or fixing method between the components is not specifically described, the connection or fixing method can be by bolt fixing or pin fixing commonly used in the prior art, or pin shaft connection, and therefore, in the present embodiments, it will not be described in detail.

[0028] The new air exchanger with stable air output provided by the present application is mainly applied to a new air exchanger using a plate heat exchanger 3, which is prone to cause heat exchange efficiency to decrease due to filter core pollution after long-term operation, thereby affecting air output and air quality. However, this is not limited, and it can also be used in other same or similar production processes.

[0029] Referring to Figure 1 , Figure 2The fresh air exchanger comprises a fresh air fan 1, an exhaust fan 2 and a plate heat exchanger 3, the plate heat exchanger 3 has fluid passage end faces 31 and end plates 32, the fresh air exchanger is provided with a limiting piece 4 for fixing and installing the plate heat exchanger 3, the limiting piece 4 is arranged at the end corner of the plate heat exchanger 3 and is perpendicular to the end plate 32, and the fluid passage end faces 31 are respectively fresh air inlet end faces 311, fresh air outlet end faces 312, exhaust air inlet end faces 313 and exhaust air outlet end faces 314; wherein the fresh air inlet end faces 311 are used for introducing outdoor fresh air, the fresh air outlet end faces 312 send the processed air into the room, the exhaust air inlet end faces 313 introduce the indoor air to be discharged, and the exhaust air outlet end faces 314 discharge the waste gas to the outdoor. The above is a description of the prior art features of the fresh air exchanger, so as to facilitate the description of the technical innovation points of the present application, and no more description is given here. Embodiment

[0030] Referring to Figure 1 The fresh air exchanger disclosed in the embodiment has stable air output, and is used to solve the problem that the heat exchange efficiency of the traditional fresh air exchanger is reduced due to filter core pollution after long-term operation, thereby affecting the air output and air quality. The fresh air exchanger further comprises a cleaning mechanism 5 arranged on the end plate 32 and located on the other side of the fluid passage end face 31 on the end plate 32; the cleaning mechanism 5 comprises a moving part 51 and a cleaning part 52, the moving direction of the moving part 51 is perpendicular to the end plate 32, and the cleaning part 52 is arranged on the moving end of the moving part 51; the cleaning part 52 is controlled by the moving part 51 to move on the fluid passage end face 31, so as to clean the plate heat exchanger 3 and avoid the problem of unstable air output caused by filter core pollution.

[0031] When the cleaning program is started, the moving part 51 starts to work and moves back and forth along the direction perpendicular to the end plate 32, so as to drive the cleaning part 52 to comprehensively cover and clean the surface of the plate heat exchanger 3. In this way, dust and harmful particles attached to the surface of the heat exchanger can be effectively removed, and the heat exchanger can maintain a high working state. Since the dust and pollutants accumulated on the heat exchanger can be regularly removed, the present application effectively maintains a high heat exchange efficiency, ensures the stability of the air output and the continuous excellent indoor air quality.

[0032] Referring to Figure 3 , Figure 4, in order to achieve the full coverage cleaning of the plate heat exchanger 3 fluid channel end face 31, the present application uses a flexible transmission element 511 as the moving end of the moving part 51. The flexible transmission element 511 has good flexibility and strength, which can ensure smooth sliding on the surface of complex shape and effective cleaning; so that the cleaning part 52 can adapt to various subtle changes of the surface of the plate heat exchanger 3, and ensure the consistency of cleaning effect. Specifically as follows:

[0033] The moving end of the moving part 51 is a flexible transmission element 511, and the cleaning part 52 is fixedly arranged on the flexible transmission element 511; both ends of the flexible transmission element 511 are respectively provided with a work tray 512 and a reset tray 513, the work tray 512 and the reset tray 513 are used for winding and releasing the flexible transmission element 511, and the winding action and the releasing action of the work tray 512 and the reset tray 513 on the flexible transmission element 511 are opposite; when the work tray 512 releases the flexible transmission element 511, the reset tray 513 winds the flexible transmission element 511, and the cleaning part 52 driven by the flexible transmission element 511 performs cleaning work on the fluid channel end face 31; when the work tray 512 winds the flexible transmission element 511, the reset tray 513 releases the flexible transmission element 511, and the cleaning part 52 driven by the flexible transmission element 511 resets to avoid affecting the normal operation of the fresh air exchanger.

[0034] Start the cleaning program, the work tray 512 starts to release the flexible transmission element 511, and at the same time the reset tray 513 synchronously winds. With the release of the flexible transmission element 511, the cleaning part 52 fixed thereon gradually moves away from the initial position, and starts to clean the surface of the plate heat exchanger 3. During the whole cleaning process, due to the flexibility of the flexible transmission element 511, the cleaning part 52 can clean every corner of the plate heat exchanger 3, effectively removing dust and harmful particles attached thereto. During this process, the flexible transmission element 511 continuously provides power support to ensure that the cleaning part 52 can uniformly and thoroughly complete the task. After cleaning is completed, the work tray 512 starts to wind the flexible transmission element 511, and the reset tray 513 releases the flexible transmission element 511 accordingly. During this process, the cleaning part 52 is brought back to the starting position, preparing for the next cleaning task. Such design not only ensures the normal operation of the equipment is not affected, but also prepares for the next cleaning.

[0035] Referring to Figure 3 , Figure 4The cleaning mechanism 5 is entirely enclosed by a sealed housing 53, which not only protects the internal components, but also effectively prevents dust and pollutants in the external air from entering the working tray 512 and the reset tray 513 area, thereby ensuring the stability of the transmission system and the reliability of long-term operation.

[0036] In order to ensure the stability of the cleaning process and minimize air flow interference, the following specific optimizations are made: the cleaning mechanism 5 has a housing 53, the working tray 512 and the reset tray 513 are arranged in the housing 53 to avoid contamination of the working tray 512 and the reset tray 513, the housing 53 has a working hole 531 and a reset hole 532, the flexible transmission element 511 connects the working tray and the cleaning component 52 through the working hole 531, and the flexible transmission element 511 connects the reset tray and the cleaning component 52 through the reset hole 532; the flexible transmission element 511 between the working hole 531 and the cleaning component 52 and the flexible transmission element 511 between the reset hole 532 and the cleaning component 52 are always in the same plane, which is perpendicular to the fluid passage end surface 31, reducing the influence of the flexible transmission element 511 on the air flow activity when the fresh air exchanger is running. Since the motion trajectory of the flexible transmission element 511 always remains in a plane perpendicular to the direction of the air flow (i.e. the direction of the fresh air flow), the presence of the flexible transmission element 511 does not significantly affect the air flow when the fresh air exchanger is running. At the same time, the movement of the transmission element in the same plane helps to maintain the consistency of the movement path of the cleaning component 52, avoiding the formation of cleaning blind areas due to deviation. By precisely controlling the motion plane of the flexible transmission element 511 to be perpendicular to the fluid passage end surface 31, the influence on the fresh air flow is significantly reduced, and the overall ventilation efficiency is improved.

[0037] To realize reasonable wiring of the flexible transmission element 511 in space and maintain its tensioned state, the following optimizations are made: the cleaning mechanism 5 has a first guide 533 and a second guide 534 acting on the flexible transmission element 511, and a steering wheel 535 arranged on the limiting piece 4 away from the outer shell 53; the flexible transmission element 511 is led out from the working hole 531, reverses the transmission direction under the action of the steering wheel 535 after passing through the first guide 533, and then enters the reset hole 532 after passing through the second guide 534; the flexible transmission element 511 between the first guide 533 and the steering wheel 535 and the flexible transmission element 511 between the steering wheel 535 and the second guide 534 are parallel to the fluid passage end surface 31; to ensure that the cleaning component 52 moves smoothly under the action of the flexible transmission element 511. The flexible transmission element 511 realizes effective transition from horizontal direction to vertical direction, and always maintains tensioned state during cleaning process, ensuring that the cleaning component 52 can obtain stable traction.

[0038] The optimized layout avoids the blocking of the cleaning component 52 during movement by the structure above, ensuring smooth operation, as follows: the cleaning component 52 is located below the first guide 533 and the second guide, so as not to block the movement of the cleaning component 52; one of the flexible transmission elements 511 between the first guide 533 and the steering wheel 535 and the flexible transmission element 511 between the steering wheel 535 and the second guide 534 is fixedly connected with the cleaning component 52 as the main traction power source, ensuring that the cleaning component 52 moves along the predetermined path; the other flexible transmission element 511 is slidably connected with the cleaning component 52, allowing the cleaning component 52 to have a certain degree of freedom during movement, allowing slight position adjustment to avoid blocking or damage to the overall transmission system due to local jamming; thereby realizing stable traction and flexible adjustment of the cleaning component 52 during movement. By introducing the combination of the first guide 533, the second guide 534 and the steering wheel 535, the spatial steering and tension adjustment of the flexible transmission element 511 are realized, improving the accuracy and execution efficiency of the cleaning path; at the same time, the cleaning component 52 and the flexible transmission element 511 adopt the connection mode of "one end fixed and one end sliding", which not only ensures stable output of traction force, but also gives the cleaning component 52 certain adaptive ability, enhancing the robustness of the system.

[0039] Referring to Figure 5 , a precise mechanical transmission system is introduced to ensure that the flexible transmission element 511 can realize stable traction and direction coordination during operation, as follows:

[0040] The moving part 51 comprises a bevel gear transmission assembly 54 for driving the work tray 512 and the reset tray 513 to rotate, the bevel gear transmission assembly 54 comprises a first bevel gear 541, a second bevel gear 542 and a third bevel gear 543, the first bevel gear 541 and the second bevel gear 542 are mirror image opposite, the third bevel gear 543 is engaged with the first bevel gear 541 and the second bevel gear 542 respectively;

[0041] Under the action of the third bevel gear 543, the rotation directions of the first bevel gear 541 and the second bevel gear 542 are opposite; the third bevel gear 543 is driven to rotate by a motor or a stepping drive device. Since the third bevel gear 543 is in the center position and is engaged with the first and second bevel gears 542, its rotation will directly affect the motion state of the gears on both sides. The work tray 512 and the reset tray 513 are arranged on the first bevel gear 541 and the second bevel gear 542 respectively, so that the work tray 512 and the reset tray 513 are opposite in the winding and releasing actions of the flexible transmission element 511 under the condition that they move in the same direction, ensuring the stable traction of the flexible transmission element 511. Although the two trays move in the same direction (i.e. both towards the cleaning part 52 or both away from the cleaning part 52), due to the reverse rotation design of the gears, when the work tray 512 releases the flexible transmission element 511, the reset tray 513 winds the flexible transmission element 511; vice versa, forming a mutually coordinated and directionally complementary transmission mechanism; during cleaning, the flexible transmission element 511 is always subjected to traction from both directions - one side releases and the other side winds, and this "one release and one winding" mode effectively avoids the problems of cleaning path deviation or failure caused by looseness or slipping.

[0042] Referring to Figure 6 , Figure 7 , the detailed embodiments of the plurality of end face cleaning structures and the cooperative driving mechanism between the flexible transmission element 511 and the bevel gear transmission assembly 54 are described. Specifically as follows:

[0043] The fresh air inlet end face 311, the fresh air outlet end face 312, the exhaust air inlet end face 313 and the exhaust air outlet end face 314 are all provided with separate cleaning parts 52, the length direction of the cleaning part 52 is parallel to the moving direction of the moving part 51, and the flexible transmission element 511 is arranged at both ends of the length direction of the cleaning part 52, ensuring the stable traction and flexible adjustment of the cleaning part 52 during movement. The double-end traction mode ensures that the cleaning part 52 is always subjected to bidirectional tension control during movement, improving the stability and adaptability during cleaning.

[0044] In order to prevent the flexible transmission element 511 from interfering with the air flow, it is arranged at the edge area of the heat exchanger surface. The flexible transmission element 511 is located at the edge and does not hinder the main air flow path, ensuring efficient ventilation efficiency; at the same time, since it is not in the main flow channel, the noise caused by the impact of the transmission element by the air flow is reduced. The bevel gear transmission assembly 54 is arranged at the end corner position of the fresh air exchanger shell 53, and the flexible transmission element 511 is directly led out from the end corner position to the edge area of the heat exchanger surface. The direct leading-out mode shortens the total length of the flexible transmission element 511, reduces the material cost, and also reduces the mechanical wear and vibration risk of the flexible transmission element 511 due to irregular path. Details are as follows:

[0045] Referring to Figure 6 When the fresh air inlet end face 311, the fresh air outlet end face 312, the exhaust air inlet end face 313 and the exhaust air outlet end face 314 are adjacent to each other, the adjacent flexible transmission elements 511 on the cleaning component 52 are driven by the same bevel gear transmission assembly 54.

[0046] Referring to Figure 7 When the fresh air inlet end face 311, the fresh air outlet end face 312, the exhaust air inlet end face 313 and the exhaust air outlet end face 314 are not adjacent to each other, the flexible transmission elements 511 at both ends of the cleaning component 52 in the length direction are driven by independent bevel gear transmission assemblies 54.

[0047] In addition, as a common knowledge in the industry, the bevel gear transmission assembly 54 mentioned in the foregoing is provided with an independent driving motor, and the flexible transmission element 511 can be a belt and a rope, and the cleaning component 52, etc. The above is common knowledge, so the principle and structure will not be described in detail.

[0048] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A fresh air exchanger with stable air output, comprising a plate heat exchanger with a fluid passage end face and an end plate, characterized in that the fresh air exchanger further comprises a cleaning mechanism arranged on the end plate and on the other side of the end plate from the fluid passage end face; the cleaning mechanism comprises a moving part and a cleaning part, the moving direction of the moving part is perpendicular to the end plate, and the cleaning part is arranged on the moving end of the moving part; the cleaning part is controlled to move on the fluid passage end face by the moving part, so as to clean the plate heat exchanger and avoid the problem of unstable air output caused by filter core pollution.

2. The fresh air exchanger according to claim 1, characterized in that the cleaning mechanism has a shell, the working tray and the reset tray are arranged in the shell, so as to avoid pollution of the working tray and the reset tray, the shell is provided with a working hole and a reset hole, the flexible transmission element connects the working tray and the cleaning part through the working hole, and the flexible transmission element connects the reset tray and the cleaning part through the reset hole. ​ ​ ​ ​ ​ ​ ​ The flexible transmission elements between the operation hole and the cleaning component and the flexible transmission elements between the reset hole and the cleaning component are always in the same plane, which is perpendicular to the fluid passage end face, reducing the impact of the flexible transmission elements on the air flow activity during the operation of the fresh air exchanger.

3. The fresh air exchanger of claim 2, wherein the fresh air exchanger is provided with a limiting piece for fixing and installing the plate heat exchanger, the limiting piece is arranged at the end corner of the plate heat exchanger and is perpendicular to the end plate, and characterized in that, The cleaning mechanism has a first guide piece and a second guide piece acting on the flexible transmission element, and a steering wheel, the first guide piece and the second guide piece are arranged on the shell, and the steering wheel is arranged on one end of the limiting piece away from the shell; The flexible transmission element is led out from the operation hole, turns over the transmission direction under the action of the steering wheel after passing through the first guide piece, and then enters the reset hole after passing through the second guide piece; The flexible transmission elements between the first guide piece and the steering wheel and between the steering wheel and the second guide piece are parallel to the fluid passage end face; ensure that the cleaning component moves smoothly under the action of the flexible transmission element.

4. The fresh air exchanger of claim 3, wherein, The cleaning component is located below the first guide piece and the second guide piece to avoid blocking the movement of the cleaning component; Among the flexible transmission elements between the first guide piece and the steering wheel and between the steering wheel and the second guide piece, one flexible transmission element is fixedly connected with the cleaning component, and the other flexible transmission element is slidably connected with the cleaning component, so as to realize stable traction and flexible adjustment of the cleaning component during movement.

5. The fresh air exchanger of claim 1, wherein the fluid passage end faces are fresh air inlet end face, fresh air outlet end face, exhaust air inlet end face and exhaust air outlet end face, respectively, and characterized in that, Each of the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face is provided with a separate cleaning component, the length direction of the cleaning component is parallel to the moving direction of the moving component, and the cleaning component is provided with the flexible transmission element at both ends of the length direction, ensuring stable traction and flexible adjustment of the cleaning component during movement.

6. The fresh air exchanger of claim 5, wherein, When the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face are adjacent to each other, the adjacent flexible transmission elements on different cleaning components are driven by the same bevel gear transmission assembly.

7. The fresh air exchanger of claim 5, wherein, When the fresh air inlet end face, the fresh air outlet end face, the exhaust air inlet end face and the exhaust air outlet end face are non-adjacent faces, the flexible transmission elements at both ends of the cleaning component length direction are driven by independent bevel gear transmission assemblies.

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