Linkage opening and closing type double-layer air door ventilator and application method

Abstract

The invention relates to a linkage opening and closing type double-layer air door ventilator and an application method. The linkage opening and closing type double-layer air door ventilator comprises a mounting frame and a heat insulation frame. An air inlet channel is arranged on the heat insulation frame; an outdoor air door is arranged on the mounting frame, and an indoor air door is arranged on the heat insulation frame; a driving mechanism and a linkage mechanism are further arranged on the ventilator; when the door is closed, the air inlet and the air outlet of the air inlet channel are respectively sealed by utilizing the synchronous movement of the outdoor air door and the indoor air door, so that a heat insulation wall with a certain thickness for sealing the inner cavity is formed in the heat insulation frame and consists of the air inlet channel, the inner cavity, the heat insulation material and the frame; the air inside the cavity does not circulate with outdoor and indoor air to form convection heat conduction, so that the wind pressure resistance / water tightness / air tightness / sound insulation / heat preservation performance of the ventilator can be effectively improved from the source under the condition of not depending on improvement of the thickness of the whole ventilator or high-price heat insulation materials, the performance upper limit of the ventilator is improved, and the service life of the ventilator is prolonged. And the method has better scene adaptability.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology, and more specifically, to a double-layer damper ventilator with linkage opening and closing mechanism and its application method. Background Technology

[0002] Ventilators are devices that achieve air exchange through natural or mechanical means. They are mainly used to regulate indoor air quality and meet the ventilation needs of buildings in commercial, medical, industrial, and agricultural fields. Their core functions include introducing fresh air, expelling pollutants, and regulating temperature and humidity. They can be divided into two categories: natural ventilation (relying on temperature difference or wind power) and mechanical ventilation (using fans to force air exchange).

[0003] Currently, the overall thickness of curtain walls in high-rise buildings is generally around 250mm. Reducing the curtain wall thickness decreases its structural strength and affects its wind pressure resistance, sound insulation, and heat insulation performance. Conversely, excessive thickness significantly increases construction costs. Within this limited thickness, it's crucial to balance external insulation with the building's structural integrity. For example, in Beijing winters, according to current heating standards, when the outside temperature is -8℃, the temperature in bedrooms and living rooms after heating must be >18℃. The heat transfer coefficient (K-value) of the building's doors, windows, or external curtain wall structure must be less than 1.5W / (mK). However, the K-value of traditional single-layer damper ventilators is only about 2.2~3.5W / (mK). The poor placement of ventilation ducts can lead to heat loss, resulting in extreme situations such as condensation or even frost formation on the ventilator surface, severely impacting indoor energy conservation, insulation, and comfort. Furthermore, due to factors such as structural safety, performance, aesthetics, and construction costs, the thickness of curtain walls is generally limited to 250-180mm (or even thinner). After deducting the space for the outer insulation layer and connections of structural components, the reserved installation thickness for ventilators is typically only around 130mm. Meeting technical requirements for ventilation volume, wind pressure resistance, water tightness, air tightness, sound insulation, and thermal insulation presents a significant challenge for ventilators, necessitating a solution using a linkage-operated double-layer damper ventilator and its application method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a linkage-operated double-layer damper ventilator, and to provide a method for applying the linkage-operated double-layer damper ventilator, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: A linkage-operated double-layer damper ventilator is constructed, comprising an installation frame and a heat insulation frame distributed sequentially from indoors to outdoors. The heat insulation frame is made of heat insulation material and has an air inlet channel on it; The mounting frame is provided with an outdoor damper for opening and closing the air inlet of the air inlet channel, and the heat insulation frame is provided with an indoor damper for opening and closing the air outlet of the air inlet channel. The ventilator is also provided with a drive mechanism and a linkage mechanism to drive the outdoor damper or the indoor damper to move. The outdoor damper and the indoor damper are linked together by the linkage mechanism to open and close. The outdoor damper is provided with one or more elastic support members; When the linkage mechanism drives the outdoor damper to move and close the air inlet of the air inlet channel, the multiple elastic support members are inserted into the air inlet channel accordingly. When the outdoor damper completely closes the air inlet of the air inlet channel, the multiple elastic holding members press the indoor damper against the inner wall of the slide groove to achieve a seal on the indoor damper.

[0006] The linkage opening and closing double-layer damper ventilator of the present invention, wherein the heat insulation frame is elongated and has multiple air inlets distributed along its length, and the multiple air inlets are combined to form the air outlet of the air inlet channel; The heat insulation frame is provided with a sliding groove for the indoor air damper to slide. The sliding groove is arranged along the length of the heat insulation frame and is connected to a plurality of air inlets. The driving mechanism drives the indoor air damper to slide along the sliding groove. The indoor air damper is elongated and has multiple ventilation holes spaced apart on it. When the ventilation holes are directly opposite the corresponding air inlets, they are in the open state; when the ventilation holes are not directly opposite the corresponding air inlets, they are in the closed state.

[0007] The linkage opening and closing double-layer damper ventilator of the present invention includes multiple outdoor damper guide rails on the mounting frame, wherein each outdoor damper guide rail is composed of two oppositely arranged guide rail blocks and a guide rail rod. An oblique groove is provided on one side surface of each of the two guide rail blocks, and the two grooves are symmetrically arranged; the two ends of the guide rail rod are respectively located in the two grooves, and the guide rail rod is connected to the outdoor damper; When the drive mechanism drives the indoor air door to slide along the slide groove, the linkage mechanism drives the outdoor air door to move. Under the guidance of multiple outdoor air door guide rails, the outdoor air door moves obliquely to close or open the air inlet of the air inlet channel.

[0008] The linkage opening and closing type double-layer damper ventilator of the present invention has an inner cavity surrounding the air inlet channel on the heat insulation frame, and the inner cavity is filled with heat insulation material.

[0009] In the linkage opening and closing double-layer damper ventilator of the present invention, the elastic pressing member is a pressing spring sheet; One end of the pressure-holding spring is fixedly connected to the outdoor air door, and the other end is provided with an inclined surface for pressing against the indoor air door.

[0010] The linkage opening and closing type double-layer damper ventilator of the present invention includes a driving mechanism comprising a bottom shell and a mounting cover plate, wherein the bottom shell and the mounting cover plate are connected and a movable chamber is provided at the connection point; The active chamber is provided with a drive rack, a rack sliding groove, and a drive gear that meshes with the drive rack; The bottom shell or the mounting cover is provided with a drive motor that passes through the movable cavity to drive the drive rack.

[0011] The linkage opening and closing type double-layer damper ventilator of the present invention includes a drive motor on one of the bottom shell and the mounting cover plate, and a manual button switch coaxially and fixedly connected to the drive gear on the other.

[0012] The linkage-operated double-layer damper ventilator of the present invention includes a linkage mechanism comprising a fixed rod and a linkage rod. The fixed rod is fixedly connected to the drive mechanism and the indoor air damper; The linkage includes a first link and a second link that are rotatably connected, with the opposite ends of the first link and the second link respectively connected to the drive mechanism and the outdoor damper.

[0013] The linkage opening and closing type double-layer air damper of the present invention, wherein the air inlet channel is gradually expanding or straight from the outside to the inside.

[0014] A method for applying a linkage-operated double-layer damper ventilator, based on the aforementioned linkage-operated double-layer damper ventilator, wherein the method includes the following steps: Closing phase: The drive mechanism causes the indoor damper to slide along the groove on the insulation frame until the ventilation hole on the indoor damper and the air inlet channel are not aligned. The linkage mechanism drives the outdoor damper to move, and under the guidance of multiple outdoor damper guide rails, the outdoor damper moves obliquely to close the air inlet of the air intake channel. Multiple elastic retaining elements on the outdoor damper press against the inner wall of the slide groove to achieve a seal on the indoor damper; Opening phase: The drive mechanism drives the indoor damper to slide along the groove on the insulation frame until the ventilation hole on the indoor damper and the air inlet channel are completely aligned. The linkage mechanism drives the outdoor damper to move, and under the guidance of multiple outdoor damper guide rails, the outdoor damper moves at an angle to open the air inlet of the air inlet channel. Multiple elastic retaining elements on the outdoor damper release their pressure on the indoor damper.

[0015] The beneficial effects of this invention are as follows: Addressing the single-layer opening and closing damper structure commonly used in similar ventilators currently on the market, this invention proposes a novel double-damper linkage structure, the advantages of which are: 1. When closing, the outdoor and indoor dampers move synchronously to seal the air inlet and outlet of the air intake channel respectively. This creates a thermal insulation wall with a certain thickness within the insulation frame, consisting of the air intake channel, inner cavity, insulation material, and the frame itself. The air inside the cavity will not convect and conduct heat with the air outside or inside. Thus, without relying on increasing the overall thickness of the ventilator or using expensive insulation materials, it can effectively improve the ventilator's wind pressure resistance, water tightness, air tightness, sound insulation, and thermal insulation performance from the source, raising the upper limit of the ventilator's performance and providing better adaptability to different scenarios. 2. The outdoor and indoor dampers are synchronized by a single drive mechanism combined with a linkage mechanism, which can ensure the consistency of the opening and closing of the air inlet and outlet of the air inlet channel, without the need for additional detection structures. 3. The single-drive design reduces the equipment cost associated with setting up multiple drive mechanisms, occupies less space, has a more compact structural layout, a lower failure rate, and lower maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the linkage opening and closing double-layer damper ventilator of the preferred embodiment of the present invention from an oblique upward view. Figure 2 This is a schematic diagram of the structure of the linkage opening and closing double-layer damper ventilator of the preferred embodiment of the present invention from a downward angle. Figure 3 This is a side view of a preferred embodiment of the linkage-opening and closing double-layer damper ventilator of the present invention; Figure 4 This is a cross-sectional view of a preferred embodiment of the linkage-opening and closing double-layer damper ventilator of the present invention; Figure 5 This is a partial structural diagram of the linkage-opening and closing double-layer damper ventilator of a preferred embodiment of the present invention from another angle; Figure 6 This is a partial exploded view of the installation frame and indoor damper of the linkage-opening and closing double-layer damper ventilator according to a preferred embodiment of the present invention; Figure 7This is a schematic diagram of the outdoor damper guide rail structure of the linkage opening and closing double-layer damper ventilator according to a preferred embodiment of the present invention; Figure 8 This is an exploded view of the drive mechanism of the linkage-opening and closing double-layer damper ventilator according to a preferred embodiment of the present invention; Figure 9 This is an exploded view of the drive mechanism of the linkage-opening and closing double-layer damper ventilator according to a preferred embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0018] The preferred embodiment of the present invention is a linkage-operated double-layer damper ventilator, such as... Figure 1 As shown, see also Figures 2-9 It includes an installation frame 1 and an insulation frame 2 distributed sequentially from indoors to outdoors; The heat insulation frame 2 is made of heat insulation material, and has an air inlet channel 20 and an inner cavity 21 surrounding the air inlet channel 20. The inner cavity 21 is filled with heat insulation material (of course, this part can also be replaced by solid insulation material, but such a solid structure will increase the cost, and this implementation is also within the scope of protection of this application). An outdoor air damper 10 with an air inlet for opening and closing the air inlet channel 20 is installed on the frame 1, and an indoor air damper 23 with an air outlet for opening and closing the air inlet channel 20 is installed on the insulation frame 2; the outdoor air damper 10 can be a solid structure or a structure with an internal cavity filled with insulation material.

[0019] The ventilator is also equipped with a drive mechanism 3 and a linkage mechanism 4 to drive the outdoor damper 10 or the indoor damper 23 to move. The outdoor damper 10 and the indoor damper 23 are linked together by the linkage mechanism 4 to open and close. This design employs an integrated polymer thermal insulation cavity ventilation structure in the central area of ​​the ventilator product. The structure combines connection, strength, sealing, thermal insulation, and ventilation functions. A multi-point sliding and pressing damper is set on the outside of the thermal insulation ventilation cavity to block and seal the flow of external cold air. At the same time, a multi-point sliding and pressing damper is also set on the inside of the thermal insulation ventilation cavity to block and seal the flow of indoor hot air. When the ventilator is closed, a closed, airtight thermal insulation cavity is formed between the outdoor and indoor dampers, greatly improving the thermal insulation performance of the ventilator.

[0020] The ventilator K-value of this double-layer damper is only about 1.5 W / (mK). Further improvements in insulation performance can be achieved by appropriately increasing the thickness of the middle layer of the insulation cavity or by applying insulation material to the inner and outer surfaces. The following is an example illustrating the parameters and corresponding performance of an actual product: A preferred size range for the ventilation cavity is: Overall effective dimensions: width 110mm, thickness 48mm, ventilation cavity width 39~62mm; depending on the different installation spaces of the curtain wall, the size of the ventilation cavity can be adjusted to be larger or smaller to meet the requirements of different ventilation volumes and thermal insulation performance.

[0021] Technical parameters of the current product: Height: Customized according to compartment dimensions. Ventilation area: 30000mm 2 / / m; 5Pa pressure difference air volume: 125m³ 3 / / (mh); Wind pressure resistance: 4.5≤P≤5 (Kpa); Water tightness performance: Δ≥1000pa; Air tightness performance: 1.5 ≥ qL > 0.5m 3 / / (mh); Thermal insulation performance: approximately 1.5 W / (㎡.K).

[0022] Specifically: 1. When the door is closed, the outdoor damper 10 and the indoor damper 23 move synchronously to seal the air inlet and outlet of the air inlet channel 20 respectively. This forms a heat insulation wall with a certain thickness within the heat insulation frame 2, consisting of the air inlet channel 20, the inner cavity 21, the heat insulation material, and the frame itself. The air inside the cavity will not convect and conduct heat with the air outside and inside. Thus, without relying on increasing the overall thickness of the ventilator or high-priced heat insulation materials, the ventilator's wind pressure resistance, water tightness, air tightness, sound insulation, and heat preservation performance can be effectively improved from the source, raising the upper limit of the ventilator's performance and providing better adaptability to different scenarios. 2. The outdoor damper 10 and the indoor damper 23 achieve synchronous movement through a single drive mechanism 3 combined with a linkage mechanism 4, which can ensure the consistency of the opening and closing of the air inlet and outlet of the air inlet channel, without the need for additional detection structures. 3. The single-drive design reduces the equipment cost associated with setting up multiple drive mechanisms, occupies less space, has a more compact structural layout, a lower failure rate, and lower maintenance costs.

[0023] Based on the above structure, in order to improve ventilation efficiency, the shape of the air intake channel 20 is further designed to be gradually expanding or straight from the outside to the inside, so as to increase the ventilation area while ensuring the air intake volume under the limited thickness. In addition, to improve the reliability of the seal, multiple elastic support members 12 are provided on the outdoor damper 10, as detailed in the corresponding description below; Preferably, the heat insulation frame 2 is elongated and has multiple air inlets 200 distributed along its length. The multiple air inlets 200 are combined to form the air outlet of the air inlet channel 20. The heat insulation frame 2 is provided with a sliding groove 24 for the indoor damper to slide. The sliding groove 24 is arranged along the length of the heat insulation frame 2 and is connected to multiple air inlets 200. The drive mechanism 3 drives the indoor damper 23 to slide along the sliding groove 24. The indoor damper 23 is elongated and has multiple ventilation holes 230 spaced out on it. When the ventilation hole 230 is directly opposite to the corresponding air inlet 200, it is in the open state; when the ventilation hole 230 is not directly opposite to the corresponding air inlet 200, it is in the closed state. The indoor damper 23 adopts a sliding opening and closing method, which can well ensure the overall thickness. Especially for the application scenario where the thickness dimension is limited, in order to further ensure the sealing while opening and closing, the following elastic pressing member 12 can be used to press and ensure sealing while linkage. Preferably, the chute 24 is provided with a dust discharge groove 240 to facilitate timely discharge of internal dust; Preferably, the mounting frame 1 has multiple outdoor damper guide rails 11, each outdoor damper guide rail 11 consisting of two oppositely arranged guide rail blocks 110 and a guide rail rod 111; An inclined groove 112 is provided on the opposite side surface of each of the two guide rail blocks 110, and the two grooves 112 are symmetrically arranged; the two ends of the guide rail rod 111 are respectively located in the two grooves 112, and the guide rail rod 111 is connected to the outdoor damper 10. When the drive mechanism 3 drives the indoor damper 23 to slide along the slide groove 112, it drives the outdoor damper 10 to move through the linkage mechanism 4. Under the guidance of multiple outdoor damper guide rails 11, the outdoor damper 10 moves obliquely to close or open the air inlet of the air inlet channel 20. Preferably, when the linkage mechanism 4 drives the outdoor damper 10 to move and close the air inlet of the air inlet channel 20, multiple elastic holding members 12 are inserted into the air inlet channel 20 accordingly. When the outdoor damper 10 completely closes the air inlet of the air inlet channel 20, multiple elastic retaining members 20 press the indoor damper 23 against the inner wall of the slide groove to achieve a seal of the indoor damper 23.

[0024] Preferably, the elastic pressing member 12 is a pressing spring sheet, and the number can be one (which can be set to have a larger width) or multiple (which can be set to have a smaller width and be distributed in a dispersed manner). One end of the retaining spring is fixedly connected to the outdoor damper 10, and the other end is provided with an inclined surface for pressing against the indoor damper 23.

[0025] Preferably, the drive mechanism 3 includes a bottom shell 30 and a mounting cover plate 31, the bottom shell 30 and the mounting cover plate 31 are connected and a movable chamber is provided at the connection point; The active chamber is provided with a drive rack 33, a rack sliding groove 34, and a drive gear 35 that meshes with the drive rack 33; A drive motor 36 (preferably a geared motor) is provided on the bottom shell 30 or the mounting cover plate 31 to drive the drive rack 33 through the movable cavity.

[0026] During driving, the drive motor 36 drives the drive gear 35 to rotate, which in turn drives the drive rack 33 to move laterally, which in turn drives the linkage mechanism 4. The structure is reasonable and compact, and the driving reliability is good. Understandably, the drive unit can also be replaced with an existing transverse drive unit, such as a cylinder, linear motor, lead screw assembly, etc. The solution obtained by directly replacing such conventional components also falls within the scope of protection of this application.

[0027] To improve the ease of use, in addition to the above-mentioned automatic adjustment drive, the following can also be provided: a bottom shell 30 and a mounting cover 31, one of which is equipped with a drive motor 36, and the other is equipped with a manual button switch 37 that is coaxially and fixedly connected to the drive gear 35; so that in special circumstances, the manual button switch 37 can be manually turned to start and stop the operation.

[0028] Preferably, the linkage mechanism 4 includes a fixed rod 40 and a linkage rod 41; The fixed rod 40 is fixedly connected to the drive mechanism 3 and the indoor damper 23; Linkage rod 41 includes a first link and a second link that are rotatably connected. The opposite ends of the first link and the second link are respectively connected to the drive mechanism 3 and the outdoor damper 10. This implementation scheme uses a two-bar structure. Understandably, it can be replaced with other existing linkage structures. Moreover, the linkage structure can be set between the drive mechanism and the two dampers, or it can be set between the two dampers. The solutions obtained by simply replacing these existing linkage structures also fall within the scope of protection of this application.

[0029] A method for applying a linkage-operated double-layer damper ventilator, based on the aforementioned linkage-operated double-layer damper ventilator, wherein the method includes the following steps: Closing phase: The drive mechanism causes the indoor damper to slide along the groove on the insulation frame until the ventilation hole on the indoor damper and the air inlet channel are not aligned. The linkage mechanism drives the outdoor damper to move, and under the guidance of multiple outdoor damper guide rails, the outdoor damper moves obliquely to close the air inlet of the air intake channel. Multiple elastic retaining elements on the outdoor damper press against the inner wall of the slide groove to achieve a seal on the indoor damper; Opening phase: The drive mechanism drives the indoor damper to slide along the groove on the insulation frame until the ventilation hole on the indoor damper and the air inlet channel are completely aligned. The linkage mechanism drives the outdoor damper to move, and under the guidance of multiple outdoor damper guide rails, the outdoor damper moves at an angle to open the air inlet of the air inlet channel. Multiple elastic retaining elements on the outdoor damper release their pressure on the indoor damper; When the door is closed, the outdoor and indoor air dampers move synchronously to seal the air inlet and outlet of the air intake channel respectively. This creates a thermal insulation wall with a certain thickness within the insulation frame, consisting of the air intake channel, inner cavity, insulation material, and the frame itself. The air inside the cavity will not convect and conduct heat with the air outside or inside. Thus, without relying on increasing the overall thickness of the ventilator or using expensive insulation materials, it can effectively improve the ventilator's wind pressure resistance, water tightness, air tightness, sound insulation, and thermal insulation performance from the source, raising the upper limit of the ventilator's performance and providing better adaptability to different scenarios. The outdoor and indoor dampers are synchronized by a single drive mechanism combined with a linkage mechanism, which can ensure the consistency of the opening and closing of the air inlet and outlet of the air inlet channel, without the need for additional detection structures. The single-drive design reduces the equipment cost associated with setting up multiple drive mechanisms, occupies less space, has a more compact structural layout, a lower failure rate, and lower maintenance costs.

[0030] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A linkage-operated double-leaf damper ventilator, characterized by comprising: The installation frame and the heat insulation frame are arranged in sequence from the indoor to the outdoor direction; The heat insulation frame is made of heat insulation material and is provided with an air inlet channel; The installation frame is provided with outdoor dampers for opening and closing air inlets of the air inlet channel, and the heat insulation frame is provided with indoor dampers for opening and closing air outlets of the air inlet channel; The ventilator is further provided with a driving mechanism and a linkage mechanism for driving the outdoor dampers or the indoor dampers to move, and the outdoor dampers and the indoor dampers are linked by the linkage mechanism to be opened and closed; The outdoor dampers are provided with one or more elastic pressing members; when the linkage mechanism drives the outdoor dampers to move to close the air inlets of the air inlet channel, the elastic pressing members penetrate into the air inlet channel; When the outdoor dampers completely close the air inlets of the air inlet channel, the elastic pressing members abut against the indoor dampers to the inner wall of the sliding groove to realize the sealing of the indoor dampers.

2. The linkage-operated, double-leaf shutter damper according to claim 1, wherein The air inlet channel is gradually expanded or straight from the outdoor to the indoor direction.

3. The linkage-operated, double-leaf shutter vent of claim 1, wherein, The heat insulation frame is in the shape of a long strip and is provided with a plurality of air inlets along the length direction, and the plurality of air inlets combine to form the air outlets of the air inlet channel; The heat insulation frame is provided with a sliding groove for the indoor dampers to slide, the sliding groove is arranged along the length direction of the heat insulation frame and is communicated with the plurality of air inlets, and the driving mechanism drives the indoor dampers to slide along the sliding groove; The indoor dampers are in the shape of a long strip and are provided with a plurality of ventilation holes at intervals, the ventilation holes are in the opened state when the ventilation holes are opposite to the corresponding air inlets, and the ventilation holes are in the closed state when the ventilation holes are not opposite to the corresponding air inlets.

4. The linked on-off double-leaf damper ventilator according to claim 3, characterized in that, The installation frame is provided with a plurality of outdoor damper guide rails, the outdoor damper guide rail is composed of two oppositely arranged guide rail blocks and a guide rail rod; The opposite side surfaces of the two guide rail blocks are provided with inclined sliding grooves, and the two sliding grooves are symmetrically arranged; the two ends of the guide rail rod are respectively located in the two sliding grooves, and the guide rail rod is connected with the outdoor dampers; When the driving mechanism drives the indoor dampers to slide along the sliding groove, the outdoor dampers are driven to move by the linkage mechanism, and the outdoor dampers are inclined to close or open the air inlets of the air inlet channel under the guidance of the plurality of outdoor damper guide rails.

5. The linkage-operated, double-leaf shutter vent of claim 1, wherein, The heat insulation frame is provided with an inner cavity surrounding the air inlet channel, and the inner cavity is filled with heat insulation material.

6. The linked on-off double door vent according to claim 1, wherein, The elastic pressing member is a pressing elastic piece; One end of the pressing elastic piece is fixedly connected with the outdoor damper, and the other end is provided with an inclined surface for abutting against the indoor damper.

7. The linked on-off double door vent according to claim 1, wherein, The driving mechanism includes a bottom shell and a mounting cover plate, the bottom shell and the mounting cover plate are connected and the connection part is provided with a movable cavity; The movable cavity is provided with a driving rack, a rack sliding groove and a driving gear engaged with the driving rack; The bottom shell or the mounting cover plate is provided with a driving motor penetrating into the movable cavity to drive the driving rack.

8. The linked on-off double door vent according to claim 7, characterized in that, The bottom shell and the mounting cover plate are provided with the driving motor on one of them and a manually operated button switch coaxially fixedly connected with the driving gear on the other of them.

9. The linkage-actuated, double-door venturi of claim 1, wherein, The linkage mechanism includes a fixed rod and a linkage rod; The fixed rod is fixedly connected with the driving mechanism and the indoor air door; The linkage rod comprises a first connecting rod and a second connecting rod which are rotatably connected, and one end of the first connecting rod and the second connecting rod is connected with the driving mechanism and the outdoor air door respectively.

10. A linkage opening and closing type double layer damper ventilator application method according to any one of claims 1 to 9, wherein, The method comprises the steps of: Door closing stage: The driving mechanism drives the indoor air door to slide along the sliding groove on the heat insulation frame to a position where the air hole on the indoor air door is not in direct position with the air inlet channel; The linkage mechanism drives the outdoor air door to move, and the outdoor air door moves in a slanting direction to close the air inlet of the air inlet channel under the guidance of the multiple outdoor air door guide rails; The elastic pressing member on the outdoor air door tightly presses the indoor air door against the inner wall of the sliding groove, thereby realizing the sealing of the indoor air door; Door opening stage: The driving mechanism drives the indoor air door to slide along the sliding groove on the heat insulation frame to a position where the air hole on the indoor air door is in direct position with the air inlet channel; The linkage mechanism drives the outdoor air door to move, and the outdoor air door moves in a slanting direction to open the air inlet of the air inlet channel under the guidance of the multiple outdoor air door guide rails; The elastic pressing member on the outdoor air door releases the tight pressing of the indoor air door.

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