Mesh cover and heating and ventilation equipment

Abstract

The embodiment of the utility model discloses a mesh enclosure and heating and ventilation equipment, the mesh enclosure is applied to the heating and ventilation equipment capable of generating airflow, the heating and ventilation equipment comprises a wind wheel, the mesh enclosure is provided with a first air outlet area corresponding to the wind wheel, and the first air outlet area is overlapped with an occupied area when the wind wheel rotates in the axis direction of the wind wheel. The mesh enclosure is provided with a plurality of first air outlet openings in the first air outlet area, the ratio of the sum of the areas of the first air outlet openings to the area of the first air outlet area is S, S is larger than or equal to 3 / 4 and smaller than or equal to 7 / 8, the first air outlet openings occupy larger area in the first air outlet area, and the mesh enclosure has better air outlet performance.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange equipment, and in particular to a mesh cover and HVAC equipment. Background Art

[0002] HVAC equipment is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. The HVAC equipment is equipped with a fan to drive the air flow so as to absorb the heat in the air through the heat exchanger. Therefore, a mesh cover with air outlet openings is installed on the outside of the shell of the HVAC equipment to discharge air. The sum of the areas of the air outlet openings determines the air outlet performance of the mask. Utility Model Content

[0003] The embodiments of the present application provide a mesh cover and HVAC equipment, which have better air outlet performance.

[0004] In a first aspect, an embodiment of the present application provides a mesh cover, which is applied to a HVAC equipment capable of generating airflow, the HVAC equipment comprising a wind wheel, the mesh cover having a first air outlet area arranged corresponding to the wind wheel, and during the rotation of the wind wheel, the area swept by the orthographic projection of the mesh cover overlaps with the first air outlet area, the mesh cover has a plurality of first air outlet openings in the first air outlet area, and the ratio of the sum of the areas of the plurality of first air outlet openings to the area of ​​the first air outlet area is S1, wherein 3 / 4≤S1≤7 / 8.

[0005] Based on the mesh cover of the embodiment of the present application, within this range, the first air outlet opening occupies a larger area of ​​the first air outlet region, which can reduce the mesh cover's obstruction to the airflow, that is, enhance the mesh cover's air outlet performance, and enable the mesh cover to have sufficient physical structure in the first air outlet region to ensure the structural strength of the mesh cover in the first air outlet region.

[0006] In some embodiments of the present application, a distance between an edge of the first air outlet opening and an edge of an adjacent first air outlet opening is m, and 1 mm≤m≤2 mm.

[0007] Based on the above embodiment, it is ensured that there is sufficient solid structure between adjacent first air outlet openings to ensure the structural strength of the mesh cover in the first air outlet area.

[0008] In some embodiments of the present application, the ratio of the length of the first air outlet area in the length direction of the mesh cover to the length of the mesh cover is k, and 1 / 2≤k≤3 / 4.

[0009] Based on the above embodiments, within this range, the length of the first air outlet area in the length direction of the mesh cover is limited to a reasonable range, so that the mesh cover has a sufficient air outlet range in its own length direction, without making the length of the first air outlet area in the length direction of the mesh cover too long, causing the airflow passing through the mesh cover to be too dispersed in the length direction of the mesh cover.

[0010] In some embodiments of the present application, the ratio of the height of the first air outlet area in the height direction of the mesh cover to the height of the mesh cover is h, and 7 / 10≤h≤3 / 4.

[0011] Based on the above embodiment, within this range, the length of the first air outlet area in the height direction of the mesh cover is limited to a reasonable range, so that the mesh cover has a sufficient air outlet range in its own height direction, without making the height of the first air outlet area in the height direction of the mesh cover too long, causing the airflow passing through the mesh cover to be too dispersed in the height direction of the mesh cover.

[0012] In some embodiments of the present application, adjacent first air outlet openings along the length direction of the mesh cover are aligned, and adjacent first air outlet openings along the height direction of the mesh cover are staggered.

[0013] Based on the above embodiment, the first air outlet openings are evenly arranged in the first air outlet area.

[0014] In some embodiments of the present application, the first air outlet area includes a structural sub-area and an air outlet sub-area, and the structural sub-area overlaps with the hub of the wind wheel along the axial direction of the wind wheel; the air outlet sub-area surrounds the circumference of the structural sub-area, and the air outlet sub-area overlaps with the area occupied by the wind wheel blades when the wind wheel rotates along the axial direction of the wind wheel, and the first air outlet opening is arranged in the air outlet sub-area.

[0015] Based on the above embodiments, and because the orthographic projection of the structural sub-area on the wind wheel along the axial direction of the wind wheel overlaps with at least part of the hub of the wind wheel, and because the amount of wind generated by the wind wheel at the hub position is extremely small, the influence of the structural sub-area on the wind outlet capacity of the mesh cover is very small, but it can significantly improve the structural strength of the mesh cover in the first wind outlet area; and the orthographic projection part of the wind outlet sub-area on the wind wheel along the axial direction of the wind wheel overlaps with the blades of the wind wheel, but does not affect the wind outlet capacity of the mesh cover in the first wind outlet area at all.

[0016] In some embodiments of the present application, the mesh cover also has a second air outlet area surrounded by the first air outlet area, and the mesh cover has multiple second air outlet openings in the second air outlet area, and the density of the first air outlet openings is greater than the density of the second air outlet openings.

[0017] Based on the above embodiment, the farther the second air outlet area is from the axis of the wind wheel, the less airflow it can receive. Therefore, the mask in the second air outlet area close to the first air outlet area still has a large air outlet demand, and a large number of second air outlet openings need to be set to ensure that the mask in the second air outlet area close to the first air outlet area still has good air outlet performance; the mask has very little or no air outlet demand in the second air outlet area far away from the first air outlet area, and a small number of or no second air outlet openings can be set, so that the structure of the mask is more reasonable, and it is ensured that the mask has good structural strength in its edge area, so the mask can be fixed to the shell of the HVAC equipment through its own edge area.

[0018] In some embodiments of the present application, the farther the second air outlet opening is from the edge of the first air outlet area, the smaller the cross-sectional area of ​​a single second air outlet opening is.

[0019] Based on the above embodiments, the farther the second air outlet area is from the axis of the wind wheel, the less airflow it can receive. Therefore, the mask in the second air outlet area close to the first air outlet area still has a large air outlet demand, and the cross-section of the second air outlet opening needs to have a larger cross-section to ensure that the mask in the second air outlet area close to the first air outlet area still has good air outlet performance; the mask has very little or no air outlet demand in the second air outlet area far away from the first air outlet area, and a second air outlet opening with a smaller cross-sectional area can be set or no second air outlet opening can be set, so that the structure of the mask is more reasonable and it is ensured that the mask has good structural strength in its edge area, so the mask can be fixed to the shell of the HVAC equipment through its own edge area.

[0020] In a second aspect, an embodiment of the present application provides a HVAC device, comprising a shell and the mesh cover as described above, wherein the orthographic projection of the first air outlet area along the axial direction of the air outlet covers the air outlet.

[0021] Based on the HVAC equipment in the embodiment of the present application, due to the presence of the above-mentioned mesh cover, the HVAC equipment has a stronger air outlet capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of a HVAC device in one embodiment of the present application;

[0024] Figure 2It is a schematic diagram of the structure of the mesh cover in one embodiment of the present application;

[0025] Figure 3 for Figure 1 The schematic diagram of the structure of the HVAC equipment shown in FIG. 1 after the mesh cover is removed;

[0026] Figure 4 for Figure 2 Enlarged schematic diagram of the structure of part A in the middle.

[0027] Figure numerals: 10, mesh cover; 11, first air outlet area; 111, structural sub-area; 112, air outlet sub-area; 1121, first air outlet opening; 12, second air outlet area; 121, second air outlet opening; 20, shell; 21, air outlet; a, length direction of the mesh cover; b, width direction of the mesh cover. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] HVAC equipment is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. The HVAC equipment is equipped with a fan to drive the air flow so as to absorb the heat in the air through the heat exchanger. Therefore, a mesh cover with air outlet openings is installed on the outside of the shell of the HVAC equipment to discharge air. The sum of the areas of the air outlet openings determines the air outlet performance of the mask.

[0030] To solve the above technical problems, please refer to Figure 1 as well as Figure 2 As shown, in the first aspect, the mesh cover 10 is applied to a HVAC equipment capable of generating airflow, the HVAC equipment comprising a wind wheel, the mesh cover 10 having a first air outlet area 11 arranged corresponding to the wind wheel, and during the rotation of the wind wheel, the area swept by the orthographic projection of the wind wheel on the mesh cover 10 overlaps with the first air outlet area 11, the mesh cover 10 has a plurality of first air outlet openings 1121 in the first air outlet area 11, the ratio of the sum of the areas of the plurality of first air outlet openings 1121 to the area of ​​the first air outlet area 11 is S1, wherein 3 / 4≤S1≤7 / 8, for example, S1 is equal to 3 / 4, 4 / 5, 5 / 6, etc.

[0031] Based on the mesh cover 10 of the embodiment of the present application, within this range, the first air outlet opening 1121 occupies a larger area of ​​the first air outlet region 11, which can reduce the obstruction of the mesh cover 10 to the airflow, that is, the air outlet performance of the mesh cover 10 is enhanced, and the mesh cover 10 has sufficient physical structure in the first air outlet region 11 to ensure the structural strength of the mesh cover 10 in the first air outlet region 11.

[0032] The wind wheel in the embodiment of the present application is used to convert mechanical energy or electrical energy into wind energy to generate airflow. It can be understood that the wind wheel in the embodiment of the present application is a horizontal-axis wind wheel, and the mesh cover 10 can be located on the low-pressure side or the high-pressure side of the wind wheel (when the mesh cover 10 is located on the low-pressure side of the wind wheel, the airflow direction is the direction of the mesh cover 10 toward the wind wheel, and when the mesh cover 10 is located on the high-pressure side of the wind wheel, the airflow direction is the direction of the wind wheel toward the mesh cover 10), and the axis wind direction is arranged perpendicular to the horizontal-axis wind wheel. At this time, the airflow direction generated by the horizontal-axis wind wheel will flow perpendicularly to the mesh cover 10.

[0033] The mesh cover 10 is usually arranged at the air inlet or outlet 21 of the HVAC equipment that can generate airflow, so as to guide and homogenize the airflow generated by the HVAC equipment, and protect the user from being harmed by the internal components of the HVAC equipment. It is understandable that the mesh cover 10 has a certain thickness, that is, the mesh cover 10 has a first side surface and a second side surface that are opposite to each other. Therefore, the embodiment of the present application further defines that any cross section of the first air outlet opening 1121 perpendicular to its own axis is the same, and in any cross section of the mesh cover 10 perpendicular to the axis of the wind wheel, the sum of the cross sections formed by the first air outlet opening 1121 accounts for the same percentage of the first air outlet area 11.

[0034] The first air outlet area 11 is used to guide and homogenize the airflow generated by the HVAC equipment. Since the shape of the area formed by the wind wheel during the rotation is circular, in some embodiments of the present application, the shape of the first air outlet area 11 is configured to be circular corresponding to the shape formed by the rotation of the wind wheel; but it can be understood that the shape of the first air outlet area 11 can be set arbitrarily and is not limited to the above-mentioned circle.

[0035] During the rotation of the wind wheel, the area swept by the orthographic projection of the wind wheel on the mesh cover 10 overlaps with the first air outlet area 11, thereby ensuring that the airflow generated when the wind wheel rotates can be received by the first air outlet area 11, thereby effectively improving the air outlet performance. For example, when the first air outlet area 11 is configured as a circle, the diameter of the first air outlet area 11 is equal to the diameter of the wind wheel and the two are coaxially arranged. At this time, the area of ​​the first air outlet area 11 is minimized while ensuring that the mesh cover 10 has a good ventilation effect, and the processing area of ​​the first air outlet area 11 can be reduced.

[0036] The first air outlet openings 1121 are used to guide and homogenize the airflow in the first air outlet area 11. It can be understood that the percentage of the first air outlet openings 1121 in the first air outlet area 11 is determined by the density of the first air outlet openings 1121 (the density in the embodiment of the present application is a generalized density. Specifically, in the embodiment of the present application, it refers to the quantitative density, that is, the number of first air outlet openings 1121 per unit area of ​​the first air outlet area 11) and the area of ​​the first air outlet area 11 occupied by each first air outlet opening 1121.

[0037] It can be understood that when the density of the first air outlet openings 1121 is greater, the area of ​​the first air outlet area 11 occupied by a single first air outlet opening 1121 is smaller, and the first air outlet area 11 has a better effect on airflow homogenization; when the density of the first air outlet openings 1121 is smaller, the area of ​​the first air outlet area 11 occupied by a single first air outlet opening 1121 is larger, and the wind resistance of the wind hood to the airflow at the first air outlet opening 1121 is smaller.

[0038] In order to balance the airflow homogenization effect and air outlet performance of the mesh cover 10 in the first air outlet area 11, in some embodiments of the present application, the distance between the edge of the first air outlet opening 1121 and the edge of the adjacent first air outlet opening 1121 is m, 1mm≤m≤2mm, for example, m is equal to 1.2mm, 1.4mm, 1.6mm or 1.8mm, etc. The interval between the edges of adjacent first air outlet openings 1121 is within this range, which limits the density of the first air outlet openings 1121, ensures the airflow homogenization effect of the mesh cover 10 in the first air outlet area 11, and ensures that there is sufficient solid structure between adjacent first air outlet openings 1121 to ensure the structural strength of the mesh cover 10 in the first air outlet area 11. At the same time, in some embodiments of the present application, the area of ​​the cross section of the first air outlet opening 1121 perpendicular to its own axis is S, 95mm 2 ≤S2≤227mm 2 , for example, S is equal to 100mm 2 , 120mm 2 、140mm 2 、160mm 2 、180mm 2 , 200mm 2 or 220mm 2 The area of ​​the cross section of the first air outlet opening 1121 perpendicular to its own axis is within this range, thereby ensuring the air outlet performance of the mesh cover 10 in the first air outlet area 11.

[0039] In some embodiments of the present application, the first air outlet opening 1121 is configured as a circular through hole. In this case, the diameter of the first air outlet opening 1121 is d, 11mm≤d≤17mm, for example, d is equal to 12mm, 13mm, 14mm, 15mm or 16mm, etc. The circular through hole facilitates the processing of the first air outlet opening 1121.

[0040] In some embodiments of the present application, the ratio of the length of the first air outlet area 11 in the length direction of the mesh cover 10 to the length of the mesh cover 10 is k, 1 / 2≤k≤3 / 4. Within this range, the length of the first air outlet area 11 in the length direction of the mesh cover 10 is limited to a reasonable range, so that the mesh cover 10 has a sufficient air outlet range in its own length direction, and the length of the first air outlet area 11 in the length direction of the mesh cover 10 is not too long, so that the airflow passing through the mesh cover 10 is too dispersed in the length direction of the mesh cover 10.

[0041] In some embodiments of the present application, the ratio of the height of the first air outlet area 11 along the height direction of the mesh cover 10 to the height of the mesh cover 10 is h, 7 / 10≤h≤3 / 4. Within this range, the length of the first air outlet area 11 in the height direction of the mesh cover 10 is limited to a reasonable range, so that the mesh cover 10 has a sufficient air outlet range in its own height direction, and the height of the first air outlet area 11 in the height direction of the mesh cover 10 is not too long, so that the airflow passing through the mesh cover 10 is too dispersed in the height direction of the mesh cover 10.

[0042] In some embodiments of the present application, adjacent first air outlet openings 1121 along the length direction of the mesh cover 10 are aligned, and adjacent first air outlet openings 1121 along the height direction of the mesh cover 10 are staggered, so that the first air outlet openings 1121 are evenly arranged in the first air outlet area 11, thereby improving the airflow homogenization effect of the mesh cover 10 in the first air outlet area 11. It is understandable that the first air outlet openings 1121 can be arranged in any manner in the first air outlet area 1.

[0043] Please refer to Figure 2 as well as Figure 3 As shown, in some embodiments of the present application, the first air outlet area 11 includes an air outlet sub-area 112 and a structural sub-area 111. The structural sub-area 111 at least partially overlaps with the hub of the wind wheel along the axial direction of the wind wheel. The air outlet sub-area 112 surrounds the circumference of the structural sub-area 111 and covers the blades of the wind wheel along the axial direction of the wind wheel. The first air outlet opening 1121 is arranged in the air outlet sub-area 112.

[0044] Furthermore, since the orthographic projection of the structural sub-area 111 on the wind wheel along the axial direction of the wind wheel overlaps with at least part of the hub of the wind wheel, and since the amount of wind generated by the wind wheel at the hub position is extremely small, the influence of the structural sub-area 111 on the wind outlet capacity of the mesh cover 10 is very small, but it can significantly improve the structural strength of the mesh cover 10 in the first wind outlet area 11; and the orthographic projection of the wind outlet sub-area 112 on the wind wheel along the axial direction of the wind wheel overlaps with the blades of the wind wheel, but does not affect the wind outlet capacity of the mesh cover 10 in the first wind outlet area 11 at all.

[0045] It can be understood that the structural sub-area 111 in the embodiment of the present application can be set to any shape, as long as the structural sub-area 111 overlaps with the part of the hub of the wind wheel along the axial direction of the wind wheel to ensure that the structural sub-area 111 does not affect the air outlet performance of the air outlet mesh cover 10; at the same time, the structural sub-area 111 can also be used to attach labels, etc.

[0046] In combination with the above-mentioned first air outlet area 11 being set as a circle, it can be understood that the air outlet sub-area 112 is set as a ring, the outer contour line of the air outlet sub-area 112 is a circle, and the inner contour line corresponds to the setting of the structure sub-area 111.

[0047] Please refer to Figure 2 as well as Figure 3 As shown, in some embodiments of the present application, the mesh cover 10 also has a second air outlet area 12 surrounding the first air outlet area 11, and the mesh cover 10 has a plurality of second air outlet openings 121 in the second air outlet area 12, and the density of the first air outlet openings 1121 is greater than the density of the second air outlet openings 121.

[0048] In the embodiment of the present application, the mesh cover 10 also has a plurality of third air outlet openings that are simultaneously located in the first air outlet area 11 and the second air outlet area 12. The third air outlet openings may be completely identical to the first air outlet openings 1121, or may be safely identical to the adjacent second air outlet openings 121. For example, most of the area of ​​the third air outlet openings is located in the first air outlet area 11, so that the third air outlet openings can be completely identical to the second air outlet openings 121.

[0049] It can be understood that the airflow is mainly homogenized and guided through the first air outlet area 11 of the mesh cover 10, but after the second air outlet area 12 is set around the first air outlet area 11, the air outlet capacity of the mesh cover 10 can be further enhanced, and a small amount of airflow can be guided to the surrounding side; in addition, the farther the second air outlet area 12 is from the axis of the wind wheel, the less airflow it can receive. Therefore, the mask still has a large air outlet demand at the position of the second air outlet area 12 close to the first air outlet area 11, and a large number of second air outlet openings 121 need to be set to ensure that the mask still has good air outlet performance at the position of the second air outlet area 12 close to the first air outlet area 11; the mask has very little or no air outlet demand at the position of the second air outlet area 12 far away from the first air outlet area 11, and a small number of second air outlet openings 121 can be set or no second air outlet openings 121 can be set, so that the structure of the mask is more reasonable, and it is ensured that the mask has good structural strength in its own edge area, and the mask can be fixed to the shell 20 of the HVAC equipment through its own edge area.

[0050] Similarly, the above effect can also be achieved by reducing the area of ​​the cross section of the second air outlet opening 121 perpendicular to its own axis. Therefore, in some embodiments of the present application, the farther the second air outlet opening 121 is from the edge of the first air outlet area 11, the smaller the area of ​​the cross section of the second air outlet opening 121 perpendicular to its own axis. Alternatively, the density and the area of ​​the cross section of the second air outlet opening 121 are reduced at the same time.

[0051] Please refer to Figure 1 , Figure 2 as well as Figure 4 As shown, in the second aspect, an embodiment of the present application provides a HVAC device, including a wind wheel and a mesh cover 10 as described above, wherein a first air outlet area 11 along the axial direction of the wind wheel coincides with an occupied area when the wind wheel rotates.

[0052] The HVAC equipment in the embodiment of the present application further includes a housing 20, the housing 20 is provided with an air outlet 21, the wind wheel is rotatably connected to the housing 20, the first air outlet area 11 coincides with the air outlet 21 along the axis direction of the wind wheel, and the air outlet 21 coincides with the wind wheel along the axis direction of the wind wheel. In some embodiments of the present application, the air outlet 21 and the first air outlet area 11 are both configured in a circular shape, the air outlet 21, the first air outlet area 11 and the wind wheel are coaxially arranged, and the diameters of the air outlet 21, the first air outlet area 11 and the wind wheel are equal.

[0053] Based on the HVAC equipment in the embodiment of the present application, due to the presence of the above-mentioned mesh cover 10, the HVAC equipment has a stronger air outlet capacity.

[0054] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A mesh cover, characterized in that: The mesh cover is applied to HVAC equipment capable of generating airflow, the HVAC equipment comprising a wind wheel, the mesh cover having a first air outlet area arranged corresponding to the wind wheel, during the rotation of the wind wheel, the area swept by the orthographic projection of the mesh cover of the wind wheel overlaps with the first air outlet area, the mesh cover has a plurality of first air outlet openings in the first air outlet area, the ratio of the sum of the areas of the plurality of first air outlet openings to the area of ​​the first air outlet area is S1, 3 / 4≤S1≤7 / 8.

2. The mesh cover according to claim 1, characterized in that: A distance between an edge of the first air outlet opening and an edge of an adjacent first air outlet opening is m, and 1 mm≤m≤2 mm.

3. The mesh cover according to claim 1, characterized in that: The ratio of the length of the first air outlet area in the length direction of the mesh cover to the length of the mesh cover is k, and 1 / 2≤k≤3 / 4.

4. The mesh cover according to claim 1, characterized in that: The ratio of the height of the first air outlet area in the height direction of the mesh cover to the height of the mesh cover is h, and 7 / 10≤h≤3 / 4.

5. The mesh cover according to claim 1, characterized in that: The first air outlet openings adjacent to the first air outlet openings along the length direction of the mesh cover are aligned, and the first air outlet openings adjacent to the first air outlet openings along the height direction of the mesh cover are staggered.

6. The mesh cover according to claim 5, characterized in that: The first air outlet area includes: a structural sub-region, wherein the structural sub-region overlaps with a hub of the wind rotor along an axial direction of the wind rotor; and An air outlet sub-area, wherein the air outlet sub-area surrounds the circumference of the structural sub-area, and the air outlet sub-area overlaps with the area occupied by the wind wheel blades when the wind wheel rotates along the axial direction of the wind wheel, and the first air outlet opening is arranged in the air outlet sub-area.

7. The mesh cover according to any one of claims 1 to 6, characterized in that: The mesh cover also has a second air outlet area surrounding the first air outlet area. The mesh cover has a plurality of second air outlet openings in the second air outlet area. The density of the first air outlet openings is greater than the density of the second air outlet openings.

8. The mesh cover according to claim 7, characterized in that: The farther the second air outlet opening is from the edge of the first air outlet area, the smaller the cross-sectional area of ​​a single second air outlet opening is.

9. A HVAC equipment, characterized in that: include: a housing having an air outlet; and According to the mesh cover as described in any one of claims 1 to 8, the orthographic projection of the first air outlet area along the axial direction of the air outlet covers the air outlet.

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