Air curtain isolation mechanism and air curtain door

Abstract

The utility model provides an air curtain isolation mechanism and an air curtain door. The air curtain isolation mechanism comprises air curtain machines which comprise the first air curtain machine and the second air curtain machine, and the first air curtain machine and the second air curtain machine are oppositely arranged; the first air curtain machine comprises a first air outlet and a first air suction opening; the second air curtain machine comprises a second air outlet and a second air suction opening; an air curtain blown out of the first air outlet enters the second air suction opening, and an air curtain blown out of the second air outlet enters the first air suction opening. The first air curtain machine and the second air curtain machine form double air curtains, so that an isolation area is formed between the double air curtains, airflow flowing on the two sides of the double air curtains can be blocked, heat transfer with temperature difference is effectively isolated, and the dustproof and purification effects can be better achieved.

Description

Technical Field

[0001] This utility model relates to the field of air curtain door technology, and in particular to an air curtain isolation mechanism and an air curtain door. Background Technology

[0002] An air curtain is an air purification device that uses a high-speed motor to drive a cross-flow or centrifugal fan to generate a powerful airflow, forming an "invisible curtain." Placed at the entrance of an air curtain door, the high-speed airflow isolates the air from the outside airflow, preventing external pollution from entering the room. It also effectively blocks outdoor dust from entering, maintaining indoor cleanliness and creating a fresh and comfortable environment.

[0003] Most existing air curtain machines use a single air curtain structure, which is a unidirectional air curtain set on the door. It can only provide a simple isolation effect. For situations where there is a temperature difference between indoors and outdoors, a single air curtain machine cannot provide effective temperature isolation. Utility Model Content

[0004] This invention provides an air curtain isolation mechanism and an air curtain door, which can solve the problem that existing air curtain machines cannot effectively isolate environments with temperature differences.

[0005] To address the aforementioned problems, this utility model provides an air curtain isolation mechanism, comprising:

[0006] An air curtain machine includes a first air curtain machine and a second air curtain machine, and the first air curtain machine and the second air curtain machine are arranged opposite to each other;

[0007] The first air curtain machine includes a first air outlet and a first air intake;

[0008] The second air curtain includes a second air outlet and a second air inlet;

[0009] The air curtain blown out from the first air outlet enters the second air inlet, and the air curtain blown out from the second air outlet enters the first air inlet.

[0010] In an optional embodiment of this utility model, the air curtain isolation mechanism further includes an air guide plate, which is disposed at the first air outlet and the second air outlet to adjust the direction of the air curtain blowing out.

[0011] In an optional embodiment of this utility model, the air guide plate is rotatably disposed on the side of the air outlet near the air intake; the air guide plate can rotate within a rotation angle range of 0°-35°, wherein when the air guide plate and the side where the air outlet is located are perpendicularly disposed, the rotation angle is 0°, and the air guide plate can rotate from the position of the 0° rotation angle toward the other side of the air outlet away from the air intake.

[0012] In an optional embodiment of this utility model, the first air outlet and the second air inlet are arranged opposite to each other, and the second air outlet and the first air inlet are arranged opposite to each other; the air curtain blown out by the first air outlet is the first air curtain, and the air curtain blown out by the second air outlet is the second air curtain. Both the first air curtain and the second air curtain are tilted and blown out at a preset angle when their respective air guide plates rotate.

[0013] According to another aspect of the present invention, an air curtain door is provided, comprising a door body and an air curtain isolation mechanism as described above, wherein the first air curtain machine and the second air curtain machine of the air curtain isolation mechanism are respectively disposed on the left and right sides of the door body.

[0014] In an optional embodiment of this utility model, the distance between the air outlet and the air inlet of the first air curtain machine and the second air curtain machine is set to m, and the width of the left and right sides of the door is set to n. m and n satisfy the following conditions: m:n = 75mm~210mm:2m~5m.

[0015] In an optional embodiment of this utility model, the fan power of the first air curtain machine and the second air curtain machine is set as v, and v and n satisfy the following conditions: v:n = 150W~450W: 2m~5m.

[0016] In an optional embodiment of this utility model, the first air curtain machine and the second air curtain machine each include a housing and a fan. The fan is disposed inside the housing. The air outlet and the air inlet are provided on the same side wall of the housing. The outlet of the fan is directly opposite the air outlet, and the inlet of the fan is connected to the air inlet.

[0017] In an optional embodiment of this utility model, the fan includes a centrifugal fan, and multiple centrifugal fans are provided and evenly distributed along the vertical direction; or,

[0018] The fan includes a cross-flow fan, and the axis of the cross-flow fan is vertically arranged.

[0019] In an optional embodiment of this utility model, the door body is further provided with a roller shutter, and the air curtain isolation mechanism is located on the outside of the roller shutter.

[0020] This utility model has the following beneficial effects:

[0021] By forming a double air curtain with the first and second air curtain machines, an isolation area is created between the two air curtains, which can block the airflow outside the double air curtains, effectively isolate the heat transfer with temperature difference, and achieve the effect of dust prevention and purification. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a structural schematic diagram of the air curtain door of this utility model;

[0024] Figure 2 This utility model Figure 1 A partial schematic diagram of AA direction in the diagram;

[0025] Figure 3 This utility model Figure 1 BB cross-sectional diagram in the middle;

[0026] Figure 4 This is a schematic diagram illustrating the principle of air curtain formation on both sides of the door body in this utility model.

[0027] The attached figures are labeled as follows:

[0028] 1. Door body; 11. Left door frame; 111. First air outlet; 112. First air intake; 12. Right door frame; 121. Second air outlet; 122. Second air intake; 13. Top door frame;

[0029] 21. First fan; 22. Second fan;

[0030] 3. Roller shutter door;

[0031] 4. First air curtain;

[0032] 5. Second air curtain;

[0033] 6. Air guide plate. Detailed Implementation

[0034] In the description of this utility model, it should be understood that if terms such as "center," "inner," "outer," "axial," "radial," and "circumferential" appear, indicating orientation or positional relationship, unless otherwise specified, they are understood to be based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, a connection can be fixed, detachable, or integral; it can be mechanical or electrical; it can be direct or indirect via an intermediate medium; it can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] This utility model provides an air curtain isolation mechanism, comprising:

[0039] An air curtain machine includes a first air curtain machine and a second air curtain machine, and the first air curtain machine and the second air curtain machine are arranged opposite to each other;

[0040] The first air curtain machine includes a first air outlet 111 and a first air intake 112;

[0041] The second air curtain includes a second air outlet 121 and a second air inlet 122;

[0042] The air curtain blown out of the first air outlet 111 enters the second air inlet 122, and the air curtain blown out of the second air outlet 121 enters the first air inlet 112.

[0043] The airflow blown out of the first air outlet 111 flows toward the second air inlet 122, thereby forming a first air curtain between the first air outlet 111 and the second air inlet 122, and the airflow blown out of the second air outlet 121 flows toward the first air inlet 112, thereby forming a second air curtain between the second air outlet 121 and the first air inlet 112.

[0044] Figures 1 to 4 An air curtain door according to a specific embodiment of the present invention is provided.

[0045] Figure 1 A schematic diagram of the structure of the air curtain door of this utility model is shown; the air curtain door includes a left door frame 11, a right door frame 12, a top door frame 13, a first fan 21, a second fan 22, and a roller shutter 3; more specifically, the first fan 21 is located inside the left door frame 11, and the second fan 22 is located inside the right door frame 12; wherein the distance between the left door frame 11 and the right door frame 12 is set as n. Figure 2 A partial schematic diagram of the air curtain door of this utility model is shown in the AA direction; as shown Figure 2 As shown, a second air outlet 121 and a second air intake 122 are provided on the inner side of the second door frame; wherein the distance between the second air outlet 121 and the second air intake 122 is set to m; Figure 2 The diagram shows the arrangement of the air intake and exhaust vents at the right door frame of the air curtain, and the air intake and exhaust vents at the left door frame of the air curtain, in conjunction with... Figure 2 The settings shown are configured symmetrically.

[0046] Figure 3 The diagram shows a BB cross-sectional view of the air curtain door of this utility model; the first air curtain 4 blown by the first fan 21 inside the left door frame 11 reaches the second air intake 122, while the second air curtain 5 blown by the second fan 22 reaches the first air intake 112; a roller shutter 3 is also provided between the left door frame 11 and the right door frame 12, with both the first air curtain 4 and the second air curtain 5 located outside the roller shutter 3. Here, "outer side" refers to the space that needs to be enclosed, relative to where the air curtain door is installed; the side of the space that needs to be enclosed is the inner side, and the opposite side is the outer side. The space that needs to be enclosed can be an operating room, a cold storage room, etc.

[0047] The first and second air curtain machines are arranged opposite each other. The air curtain blown out from the first air outlet 111 enters the second air inlet 122, and the air curtain blown out from the second air outlet 121 enters the first air inlet 112. This arrangement can form two air curtains. The internal area between the two air curtains constitutes an air isolation layer. This air isolation layer can effectively isolate the air outside the two air curtains, which can prevent debris from passing through and block the transfer of heat, thus playing a role in heat insulation.

[0048] The airflow pattern of the first and second air curtain machines is as follows: after flowing out from the first air outlet 111, the air is drawn in by the second air inlet 122, then blown out through the second air outlet 121, and then returns to the first air inlet 112, thus forming a circulating flow. The air curtain isolation zone is formed by the two air curtains and the internal air isolation layer between the two air curtains. This air curtain isolation zone has good stability, thus achieving a good isolation effect.

[0049] Because the airflow circulates between the two air curtain units, the probability of outside air joining the air curtain is greatly reduced. Therefore, the air on both sides of the air curtain isolation zone is blocked by the air curtain isolation zone. Even when there are differences in air quality and temperature on both sides of the air curtain isolation zone, the air curtain isolation zone effectively prevents the mixing of air from both sides, thus achieving a good isolation effect. The aforementioned differences in air quality on both sides of the air curtain isolation zone could be, for example, differences in the content of bacteria, dust, or humidity.

[0050] In some embodiments, the air curtain isolation mechanism further includes an air guide plate 6, which is disposed at the first air outlet 111 and the second air outlet 121, and is used to adjust the direction in which the air is blown out of the air curtain.

[0051] According to this utility model, by setting air guide plates 6 at the air outlets of the first and second air curtain machines, the direction of the airflow is guided, thereby adjusting the angle of the air curtain so that the air curtain discharged from the air outlet can reach the air intake on the opposite side. Optionally, air guide plates can also be set at the air intake of the first or second air curtain machine.

[0052] The air guide plate 6 is a long strip-shaped plate structure with a rotating shaft structure at both long ends, which allows the air guide plate to rotate around the rotating shaft. Before forming an air curtain, the air guide plate 6 can be rotated manually or electrically to form the desired air curtain. After a stable air curtain is formed, the air guide plate 6 can be fixed in place.

[0053] The air guide plate 6 has a smooth airflow guiding surface, which can guide the airflow direction and is also beneficial to the stability and uniformity of the air curtain.

[0054] In some embodiments, the air guide plate 6 is rotatably disposed on the side of the air outlet near the air intake; the air guide plate can rotate within a rotation angle range of 0° to 35°, and the rotation angle can be any value between 0° and 35°. When the air guide plate 6 and the side where the air outlet is located are perpendicularly arranged, the rotation angle is 0°, and the air guide plate can rotate from the position with a rotation angle of 0° toward the other side of the air outlet away from the air intake. The aforementioned rotation angle can be 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, or any value between these values.

[0055] A rotatable air guide plate 6 is installed on the side of the air outlet near the air inlet. This air guide plate 6 reduces the negative pressure effect of the air inlet on the air outlet, ensuring the stability of the air curtain. By rotating the air guide plate 6, the direction of the air curtain is changed, so that the air curtain blows out in the direction guided by the air guide plate 6, reaching the air inlet on the opposite side and forming a complete air curtain.

[0056] The air guide plate 6 rotates towards the side away from the air outlet and the air inlet, so that the two air curtains do not interfere with each other and the airflow is stable.

[0057] In some embodiments, the first air outlet 111 is arranged opposite to the second air inlet 122, and the second air outlet 121 is arranged opposite to the first air inlet 112; the airflow blown out from the first air outlet 111 forms a first air curtain 4, and the airflow blown out from the second air outlet 121 forms a second air curtain 5. Both the first air curtain 4 and the second air curtain 5 are tilted and blown out at a preset angle when their respective air guide plates rotate.

[0058] The first air outlet 111 and the second air inlet 122 are arranged opposite each other, and the second air outlet 121 and the first air inlet 112 are arranged opposite each other. The air curtains generated by the two air curtain machines can form an air curtain isolation zone, but the airflow will diffuse to a certain extent after it is discharged from the air outlet, so the two air curtains exchange with the surrounding air. This utility model adjusts the angle of the guide plate of the first air curtain 4 blown out by the first air outlet 111 and the second air curtain 5 blown out by the second air outlet 121 so that the air curtains are blown out in an inclined direction. The inclined direction is towards the direction away from the air inlet on the same side. After the two air curtains are blown out a certain distance, due to the negative pressure of the air inlet of the air curtain machine on the opposite side, they will change direction and bend, that is, bend towards the air inlet.

[0059] The airflow blowing out of each outlet moves forward in a straight line. As the distance increases, the wind speed and force gradually weaken and diffuse. At this time, under the action of the wind force of the opposite side air intake, the gradually weakening wind blowing out of the outlet is strengthened and then sent to the opposite side air intake. The biggest advantage of this air curtain principle is that there is no loss of wind force, mutual force is used, and the wind beam basically does not diffuse.

[0060] Figure 3 The operating trajectories of the first air curtain 4 and the second air curtain 5 are shown. The air curtains delivered from the first air outlet 111 and the second air outlet 121 are both blown out in a direction away from the air inlet on the same side. Under the negative pressure of the air inlet on the same side, combined with the negative pressure of the air inlet on the opposite side, each air curtain will turn after running a certain distance and eventually enter the air inlet on the opposite side, forming a circulating flow. This dual air curtain structure reduces the interference between the two air curtain machines, making the circulating airflow more stable, thus improving the stability of the entire air curtain isolation zone and the isolation performance.

[0061] Meanwhile, this double-air curtain structure with a large gap in the middle can maximize the isolation area of ​​the air curtain and better ensure the blockage of air inside and outside, resulting in good dustproof and heat insulation effects.

[0062] According to another aspect of the present invention, an air curtain door is provided, comprising a door body 1 and an air curtain isolation mechanism as described above, wherein the first air curtain machine and the second air curtain machine of the air curtain isolation mechanism are respectively disposed on the left and right sides of the door body 1. The door body 1 is formed by a left door frame 11, a right door frame 12 and a top door frame 13.

[0063] A first air curtain machine and a second air curtain machine are respectively installed on the left door frame 11 and the right door frame 12 of the air curtain door body 1. The air curtain isolation zone formed by the double-layer air curtain and the air isolation layer between them can effectively block external airflow and dust and other debris from entering the air curtain door. It can also purify the airflow of personnel and items entering and exiting the air curtain door, blowing away the dust they carry. In order to achieve the purification function of the air curtain, a filter structure, including grilles and filters, needs to be installed at the air intake. This can further reduce the impact of external temperature on the temperature of the air curtain door through the door body 1.

[0064] In some embodiments, the distance between the air outlet and the air intake of the first air curtain machine or the second air curtain machine is set to m, and the width of the left and right sides of the door body 1 is set to n, that is, the distance between the left door frame 11 and the right door frame 12 is n. m and n satisfy the following conditions: m:n = 75mm~210mm:2m~5m.

[0065] The left door frame 11 and right door frame 12 of the door body 1 can be used as two air curtain machines of this utility model. Specifically, the left door frame 11 and right door frame 12 are both hollow structures with fans inside. Air outlets and air inlets are provided on the opposite sides of the left door frame 11 and right door frame 12, thus forming two air curtain machines. The air outlets and air inlets on each side are spaced apart to avoid mutual interference between air outlets and air inlets. However, this spacing is related to the distance between the left door frame 11 and right door frame 12. The larger the distance between the left door frame 11 and right door frame 12, the larger the spacing between the air outlets and air inlets will be, thus improving the stability of the air curtain.

[0066] This invention compares the distance between the air outlet and the air intake with the distance between the left door frame 11 and the right door frame 12 to obtain an optimal ratio range of m:n = 75mm~210mm: 2m~5m. This setting is beneficial for manufacturing and can improve manufacturing efficiency. For example, m can be 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, or any value between these values. For example, n can be 2m, 2.5m, 3m, 3.5m, 4m, 4.5m, 5m, or any value between these values.

[0067] In some embodiments, the fan power of the first or second air curtain machine is set as v, where v satisfies the following condition: v : n = 150W ~ 450W : 2m ~ 5m. For example, v can be 150W, 160W, 170W, 180W, 190W, 200W, 210W, 220W, 230W, ... 380W, 390W, and 400W, or any value between these values.

[0068] In traditional air curtain doors, if the air curtain is a single-air curtain structure, air is generally supplied from one side to the other to form an air curtain. This necessitates increasing the airflow velocity to ensure that the air curtain reaches the other side. Even in structures with air curtain machines on opposite sides, the two air curtains are usually blown upwards, meaning they collide in the middle and create lateral flow on both sides of the air curtain to ensure the isolation effect. This also requires the airflow velocity from the fans on both sides to reach a certain level to achieve this.

[0069] This invention uses the air outlet of one air curtain machine and the air inlet of the other air curtain machine on the opposite side to form an air curtain. Combined with the negative pressure state formed by the air inlet, the airflow velocity sent out from the air outlet can be greatly reduced, thus completing the entire air curtain. This reduces the fan speed and power consumption, saving energy.

[0070] This invention compares the air outlet wind speed with the width of the door body 1 to determine the most effective ratio range, and allows for the selection of appropriate fan type and model based on different door body 1 widths.

[0071] In some embodiments, the first air curtain machine and the second air curtain machine each include a housing and a fan. The fan is disposed inside the housing, and the housing has an air outlet and an air inlet on the same side wall. The outlet of the fan is directly opposite the air outlet, and the inlet of the fan is connected to the air inlet.

[0072] The specific structure of the air curtain machine is as follows: a fan is installed inside the casing, and an air outlet and an air inlet are installed on the same side of the casing. The outlet and air outlet of the fan are aligned to ensure that the air delivered by the fan can be delivered quickly. The inlet of the fan is connected to the air inlet. Under the action of negative pressure at the inlet of the fan, the air introduced by the air inlet is sent to the fan.

[0073] In some embodiments, the fan includes a centrifugal fan, and multiple centrifugal fans are provided and evenly distributed along the vertical direction; or, the fan includes a cross-flow fan, and the axis of the cross-flow fan is vertically arranged.

[0074] For the fans used in the air curtain machine, centrifugal fans can be used. Since the outlet area of ​​a centrifugal fan is relatively small compared to the door frame, multiple centrifugal fans can be installed, evenly spaced along the length of the door frame. Combined with the air outlet, air inlet, and air guide plate, a complete air curtain can be formed, achieving the air curtain isolation effect between the doors. For example... Figure 1 As shown, four centrifugal fans are installed on the left door frame 11 and the right door frame 12, and are evenly distributed at intervals between them.

[0075] The fan can also be a cross-flow fan, which has a vertical shaft and a long strip outlet, making the entire air curtain more uniform.

[0076] Because the outlet of the cross-flow fan is relatively wide, the number of fans required can be significantly reduced compared to centrifugal fans; a maximum of two fans can be installed on each side door frame to form an air curtain.

[0077] In some embodiments, the door body 1 is further provided with a roller shutter 3, and the air curtain isolation mechanism is located on the outside of the roller shutter 3.

[0078] The air curtain door is also equipped with a roller shutter 3. The roller shutter 3 is raised and lowered by a winch installed on the top frame 13 of the door, thereby realizing the opening and closing of the air curtain door.

[0079] This utility model places the air curtain isolation mechanism on the outside of the roller shutter 3. Based on the air curtain isolation, combined with the isolation of the roller shutter 3, it can more effectively block dust and the circulation of indoor and outdoor air, and improve the cleanliness of the entire air curtain door.

[0080] The working process of the air curtain isolation mechanism of this utility model is described below.

[0081] Turn on the fan in the air curtain machine on the opposite side, and adjust the air guide plate at the first air outlet 111 of the first air curtain machine so that the airflow sent out from the first air outlet 111 can be drawn into the second air intake 122 of the second air curtain machine on the opposite side; similarly, adjust the air guide plate at the second air outlet 121 of the second air curtain machine so that the airflow sent out from the second air outlet 121 can be drawn into the first air intake 112 of the first air curtain machine, thus forming a double air curtain structure.

[0082] Optionally, the air guide plate can be further adjusted so that the airflow from each air outlet is first deflected to the outside of the air curtain isolation zone, and then drawn into the opposite air intake under the negative pressure of the opposite air intake, thereby expanding the space of the entire air curtain isolation zone.

[0083] In a structure equipped with roller shutter 3, an air curtain isolation mechanism may be selectively used, including pausing the operation of the air curtain isolation mechanism when the roller shutter 3 is lowered, and operating the air curtain isolation mechanism when the roller shutter 3 is opened.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air curtain isolation mechanism, characterized in that, include: An air curtain machine includes a first air curtain machine and a second air curtain machine, and the first air curtain machine and the second air curtain machine are arranged opposite to each other; The first air curtain machine includes a first air outlet and a first air intake; The second air curtain includes a second air outlet and a second air inlet; The air curtain blown out from the first air outlet enters the second air inlet, and the air curtain blown out from the second air outlet enters the first air inlet.

2. The air curtain isolation mechanism according to claim 1, characterized in that: The air curtain isolation mechanism also includes an air guide plate, which is located at the first air outlet and the second air outlet to adjust the direction of the air curtain.

3. The air curtain isolation mechanism according to claim 2, characterized in that: The air guide plate is rotatably disposed on the side of the air outlet near the air inlet; the air guide plate can rotate within a rotation angle range of 0° to 35°, wherein when the air guide plate is perpendicular to the side where the air outlet is located, the rotation angle is 0°, and the air guide plate can rotate from the position of the 0° rotation angle toward the other side of the air outlet away from the air inlet.

4. The air curtain isolation mechanism according to claim 3, characterized in that: The first air outlet and the second air inlet are arranged opposite to each other, and the second air outlet and the first air inlet are arranged opposite to each other; the air curtain blown out by the first air outlet is the first air curtain, and the air curtain blown out by the second air outlet is the second air curtain. Both the first air curtain and the second air curtain are tilted and blown out at a preset angle when their respective air guide plates rotate.

5. An air curtain door, characterized in that, It includes a door body and an air curtain isolation mechanism as described in any one of claims 1-4, wherein the first air curtain machine and the second air curtain machine of the air curtain isolation mechanism are respectively located on the left and right sides of the door body.

6. The air curtain door according to claim 5, characterized in that: The distance between the air outlet and air inlet of the first air curtain machine and the second air curtain machine is set to m, and the width of the left and right sides of the door is set to n. m and n satisfy the following conditions: m:n = 75mm~210mm:2m~5m.

7. The air curtain door according to claim 6, characterized in that: The fan power of the first air curtain machine and the second air curtain machine is set as v, and v and n satisfy the following conditions: v:n = 150W~450W: 2m~5m.

8. The air curtain door according to claim 6 or 7, characterized in that: The first air curtain machine and the second air curtain machine each include a housing and a fan. The fan is disposed inside the housing. The air outlet and the air inlet are provided on the same side wall of the housing. The outlet of the fan is directly opposite the air outlet, and the inlet of the fan is connected to the air inlet.

9. The air curtain door according to claim 8, characterized in that: The fan includes centrifugal fans, and multiple centrifugal fans are provided and evenly distributed along the vertical direction, or... The fan includes a cross-flow fan, and the axis of the cross-flow fan is vertically arranged.

10. The air curtain door according to claim 5, characterized in that: The door is also equipped with a roller shutter, and the air curtain isolation mechanism is located on the outside of the roller shutter.

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