CN214941773U

CN214941773U - Exhaust box for roof

Info

Publication number: CN214941773U
Application number: CN202120710541.9U
Authority: CN
Inventors: 彭代志; 彭代敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-30
Anticipated expiration: 2031-04-07

Abstract

The utility model provides an exhaust box for roofing relates to building exhaust component field technical field, and it includes box body and blast pipe, and air inlet and exhaust hole have been seted up respectively to the box body, and the blast pipe is linked together with the air inlet, has seted up the through-hole on the blast pipe, and box body inner wall and blast pipe inner wall are provided with the water conservancy diversion layer that is used for ventilative water absorption, and the box body is equipped with the hem. Find that other follow through-hole entering blast pipe of slope in-layer area moisture advance the exhaust hole on the box body to arrange to external atmospheric environment in, diversion layer wherein adsorbs moisture to its inside then slow evaporation discharge, has certain effect of alleviating, has solved the problem that moisture evaporation and gas contraction expansion arouse in the heat preservation to a certain extent. And the box body with the folded edge ensures that the box body has better air tightness and waterproofness.

Description

Exhaust box for roof

Technical Field

The utility model relates to a building exhaust component technical field particularly, relates to an exhaust box for roofing.

Background

Roofing leaks are a common building quality problem. In the subsection construction of the roof, the slope finding layer contains certain moisture, the moisture in the slope finding layer can not be discharged after the waterproof layer is constructed, the moisture in the slope finding layer is sealed under the waterproof layer of the coiled material, once the temperature is high (especially in hot summer), the moisture evaporates, the volume expands, the coiled material can bulge, the waterproof layer of the coiled material cracks and is damaged, and the water leakage of the roof is caused. In order to solve the problems that the waterproof layer bulges due to the evaporation of water in the heat-insulating layer and the waterproof layer cracks in serious cases, the conventional method is to arrange an exhaust groove during the construction of the heat-insulating layer, fill light loose materials such as ceramsite in the exhaust groove, and insert a roof exhaust pipe at the joint of a plurality of exhaust grooves. The lower end of the roof exhaust pipe with the through hole is surrounded by the light loose material, and the upper end of the roof exhaust pipe sequentially penetrates through the leveling layer and the waterproof layer and then enters the outside of the roof structure layer. In practical application, through the combination of the exhaust groove, the loose filling material and the roof exhaust pipe, part of water evaporated in the heat-insulating layer can be exhausted to the outside air, so that the problem caused by water evaporation in the heat-insulating layer is solved to a certain extent, but the exhaust effect needs to be further improved. Meanwhile, the roof exhaust pipe is directly inserted into the loose filling material, so that the roof exhaust pipe is not easy to fix during construction, and is not good in stability after installation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exhaust box for roofing, it can arrange the moisture that evaporates in the heat preservation to the outside air in, prevents to make the heat preservation bulge because of the expend with heat and contract with cold that external environment arouses, arouses waterproof layer fracture scheduling problem even more, has solved the problem that moisture evaporation and gas contraction expansion arouse in the heat preservation to a certain extent.

The embodiment of the utility model is realized like this:

the utility model provides a roofing is with exhaust box, its includes box body and blast pipe, and air inlet and exhaust hole have been seted up respectively to the box body, and the blast pipe is linked together with the air inlet, has seted up the through-hole on the blast pipe, and box body inner wall and blast pipe inner wall are provided with the water conservancy diversion layer that is used for breathing freely to absorb water, and the box body is equipped with the hem.

In some embodiments of the present invention, the box body is provided with an oblate mounting hole.

In some embodiments of the present invention, the vent hole is connected to a waterproof plate.

In some embodiments of the present invention, the flow guiding layer is a porous water-absorbent resin soft board with pores communicated with each other.

In some embodiments of the present invention, the flow guiding layer is a hot air non-woven fabric, the hot air non-woven fabric has a surface layer and an inner layer, the surface layer is an ultrafine fiber, and the inner layer is a coarse denier fiber.

In some embodiments of the utility model, be equipped with the fluffy layer that is used for absorbing and retains liquid in the box body, fluffy level is inboard in the water conservancy diversion layer.

In some embodiments of the present invention, the lofty layer is loose absorbent fibers.

In some embodiments of the present invention, the outer side of the box body and/or the exhaust pipe is provided with a breathable protective layer.

In some embodiments of the present invention, the protective layer is a fabric or a breathable film.

In some embodiments of the present invention, the protective layer is a flexible phase change energy storage plate.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

the utility model provides an exhaust box for roofing, box body inner wall and blast pipe inner wall are provided with the water conservancy diversion layer that is used for ventilative absorbing water. The water in the roof slope finding layer is evaporated, and the gas with water vapor due to gas expansion can enter the flow guide layer through the through holes in the exhaust pipe, so that a small amount of water in the gas can be sucked into the flow guide layer, and the residual gas with water enters the box body and is exhausted through the exhaust holes communicated with the external atmosphere. And when the gas in the exhaust pipe tends to the stable state, the water conservancy diversion layer adsorbs the water content in the gas in the exhaust pipe in the water conservancy diversion layer will be stayed, then slowly evaporation release under the environment of external high temperature, avoids causing the phenomenon of bulging because the water content rises with heat and contracts with cold in the gas under the confined environment, and what even more arouses fracture, the damage of waterproof layer, prevents to cause roofing percolating water. When the external environment humidity is large and the humidity in the exhaust box is small, the inside and the outside of the exhaust box can exchange the temperature and the humidity due to the fact that the exhaust holes are communicated with the external atmosphere environment, external wet air can pass through the flow guide layer when entering the exhaust box through the exhaust holes, moisture in the wet air is sucked into the flow guide layer, the external wet air is prevented from flowing into the exhaust pipe and then is diffused to the roof slope finding layer, and then the roof is damp and mildewed due to the relatively closed environment. When the outside temperature rises, the moisture in the flow guide layer is slowly evaporated and discharged out of the exhaust box. The setting of water conservancy diversion layer can initiatively absorb moisture in the external world or the inside gas of roof and make moisture slowly evaporate, plays certain effect of alleviating to the thermal expansion shrinkage that arouses by the ambient temperature change, has solved the moisture evaporation in the heat preservation and has aroused the waterproof layer and play bulging, waterproof layer fracture scheduling problem. In addition, this air discharge box for roofing is whole to be buried inside the wall body and is used, has guaranteed the finish nature on wall body surface, compares with current roofing exhaust apparatus, can effectively avoid stretching out the pipeline trip user on roof, has solved potential safety hazard. Moreover, the box body edge is provided with the hem, and the hem is pressed into a wall when the box body is buried into a roof, so that the air tightness and the water resistance are better, no special fixation is needed, and the installation is more stable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an exhaust box according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the top surface of a porous water absorbent resin soft board according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an exhaust box according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view of a hot air non-woven fabric according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a spacer fabric of a protective layer according to an embodiment of the present invention.

Icon: 100-exhaust box for roof; 110-a cartridge; 111-an air inlet; 112-vent hole; 113-mounting holes; 114-a waterproof sheet; 120-a flow guiding layer; 121-a surface layer; 122-inner layer; 130-an exhaust pipe; 131-a through hole; 140-a bulky layer; 150-protective layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "vertical", "inside", "outside", etc. are used, the directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the element or elements have to have a specific direction, be constructed and operated in a specific direction is not understood as the limitation of the present invention.

Furthermore, the terms "vertical", "overhang", and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1 and 3, fig. 1 is a schematic structural diagram of an exhaust box according to an embodiment of the present invention, and fig. 3 is a cross-sectional view of the exhaust box according to the embodiment of the present invention.

The embodiment provides an exhaust box 100 for a roof, which comprises a box body 110 and an exhaust pipe 130, wherein the top wall and the side wall of the box body 110 are respectively provided with an air inlet 111 and an exhaust hole 112, the exhaust pipe 130 is communicated with the air inlet 111, the exhaust pipe 130 is provided with a through hole 131, and the inner wall of the box body 110 and the inner wall of the exhaust pipe 130 are provided with a flow guide layer 120 for ventilating and absorbing water. The slope finding layer contains certain moisture in the construction of roofing subsection, and the moisture in the slope finding layer can not discharge after the waterproof layer construction is finished, and once the moisture evaporates and causes the volume expansion in the rising of temperature, the waterproof layer will appear and bulge or even crack, damage and the like phenomenon to cause roofing seepage water. In this embodiment, the flow guiding layer 120 has the air permeable and water absorbent properties, so that the gas with water vapor due to gas expansion in the slope finding layer can enter the flow guiding layer 120 through the through holes 131 on the exhaust pipe 130, the flow guiding layer 120 can absorb a small amount of water in the gas into the flow guiding layer, and the remaining gas with water enters the box body 110 and is exhausted through the exhaust holes 112 communicated with the outside atmosphere. And when the gas in blast pipe 130 tends to the steady state, water absorption in the gas in blast pipe 130 is in water conservancy diversion layer 120 to water conservancy diversion layer 120 will be retained, then slowly evaporation release under the environment of external high temperature, avoids causing the phenomenon of bulging because water in the gas rises with heat and contracts with cold, and what arouse even more that the waterproof layer ftractures, damages, prevents to cause roofing percolating water under the confined environment. When the moisture in the slope layer is exhausted and the humidity of the external environment is high, the humidity in the box body 110 is low compared with the external environment, the air vent 112 is communicated with the external atmosphere, and the temperature and the humidity can be exchanged due to air convection. When entering the box body 110 through the exhaust hole 112, the external humid air passes through the flow guiding layer 120, and the moisture in the air is adsorbed inside the flow guiding layer 120, so that the external humid air is prevented from diffusing to the roof slope finding layer through the exhaust pipe 130, and the roof is prevented from being damp and mildewed due to the relatively closed environment. When the external temperature rises, the moisture of the guide layer 120 is slowly evaporated and discharged out of the case 110. The arrangement of the flow guide layer 120 can absorb moisture in the air outside or inside the roof and slowly evaporate the moisture, so that the heat expansion and cold contraction caused by the change of the outside temperature can be relieved to a certain extent, and the problems that the waterproof layer is expanded and the waterproof layer is cracked and the like caused by the evaporation of the moisture in the heat insulation layer are solved. In addition, this exhaust box 100 for roofing buries the inside use of wall body entirely, has guaranteed the smoothness nature on wall body surface, compares with current roofing exhaust apparatus, can effectively avoid stretching out the pipeline trip user on roof, has not only solved latent potential safety hazard, still does benefit to the pleasing to the eye of roof. Moreover, the edge of the top wall of the box body 110 is provided with an inward bending folded edge, and when the device is embedded into a roof and the top wall is fixed with the side wall of the box body 110 through screws, the folded edge is pressed into a wall, so that the air tightness and the water resistance are good, no special fixation is needed, and the installation is stable.

Referring to fig. 2, fig. 2 is a cross-sectional view of the top surface of the porous water-absorbent resin soft board according to the embodiment of the present invention. In detail, the flow guiding layer 120 is a porous water absorbent resin soft board with pores communicated with each other, and the pores are capillary pores. In this embodiment, the surface layer 121 of the porous water-absorbent resin soft board is mounted on the inner wall of the case 110 and the inner wall of the exhaust pipe 130 by a screw pair. When the moisture in the gas contacts with the surface layer 121 of the porous water-absorbing resin soft board, the surface layer 121 of the soft board is wetted due to good water absorption, the capillary of the surface layer 121 of the soft board is filled with the moisture, the cohesion of the water is smaller than the adhesive force between the water and the pore wall, the water extends upwards along the wall surface, the liquid level bends upwards to form a concave surface, the moisture on the surface of the soft board migrates to the pores in the soft board and is stored due to the action of surface tension, then the moisture in the soft board is slowly evaporated and discharged, the water vapor is prevented from staying inside a roof, and the potential factor causing roof leakage is eliminated.

Referring to fig. 4, fig. 4 is a partial enlarged view of a hot-air non-woven fabric according to an embodiment of the present invention. Optionally, the flow guiding layer 120 is a hot air non-woven fabric having a surface layer 121 and an inner layer 122. In this embodiment, the inner layer 122 of the thermal non-woven fabric is adhered to the inner wall of the box 110 and the inner wall of the exhaust pipe 130 by an adhesive. It should be noted that the gluing method adopts point gluing, that is, gluing is used at the non-exhaust hole 112, and this point gluing type connection method can prevent glue from blocking the pores of the hot air non-woven fabric and further blocking the through hole 131 on the exhaust pipe 130, which causes unsmooth gas flow in the slope finding layer at the through hole 131 and causes the waterproof layer to bulge. Specifically, the non-woven fabric has more gaps among fibers, and the air permeability of the non-woven fabric is better, so that the speed of water vapor diffusion and transportation in the gaps among the fibers is higher, and then gas can be discharged quickly. And the pores among the fibers are large, so that the radius of a capillary pipeline is large, the absorption resistance of a capillary core is small, the moisture can be favorably guided into the inner layer 122 from the surface layer 121 of the hot-air non-woven fabric, and the phenomena of roof water leakage and the like caused by the moisture existing in the slope finding layer all the time are avoided. Further, the surface layer 121 is made of ultra-fine fibers, and the inner layer 122 is made of coarse denier fibers. Thicker capillaries are formed among the fibers of the inner layer 122 of the hot-air non-woven fabric, and smaller additional pressure is formed by the capillaries of the inner layer 122; the surface layer 121 fibers form fine capillaries, and the surface layer 121 capillaries form larger attached pressure; an additional pressure difference is generated between the inner layers 121 of the through-air non-woven fabric, thereby forming a differential capillary effect, and the moisture at the junction with the inner layers 122 of the through-air non-woven fabric is automatically guided from the inner layers 122 to the surface layers 121. Meanwhile, the surface layer 121 has small water conduction and diffusion resistance, so that the capillary wicking speed is high, and the gas can be dried quickly.

Further, in order to enhance the moisture absorbing and storing capability of the exhaust box 100 for a roof, a fluffy layer 140 for absorbing and retaining liquid is disposed in the box body 110, and the fluffy layer 140 is located inside the flow guide layer 120, please refer to fig. 3. The pores are distributed in the fluffy layer 140, so that a high degree of hollowness is formed, the capillary wicking effect is strong, and a large amount of water can be absorbed and a large amount of gas can permeate instantly. In this embodiment, the bulky layer 140 is loose water-absorbent fibers. When water absorption fiber contacts with water vapor, the water molecules are firstly adsorbed to the surface of the fiber, then the water vapor diffuses towards the inside of the fiber and is combined with hydrophilic groups on macromolecules in the fiber, then the water molecules enter the gap holes of the fiber to form capillary water, so that the water is actively adsorbed to the fluffy layer 140 from the flow guide layer 120, the capillary flow dynamic effect is improved, more water in the slope finding layer is rapidly transferred to the flow guide layer 120 and the fluffy layer 140, and the potential hidden danger of roof leakage is solved.

In this embodiment, the box body 110 includes a cover plate and a box body, in this embodiment, the cover plate and the box body are connected by a thread, and for convenience of installing the cover plate, an oblate installation hole 113 is formed in the cover plate, please refer to fig. 1. When the hole formed on the wall surface has a slight tolerance with the mounting hole 113 during installation, the probability of successful installation at one time can be adjusted through the oblate mounting hole 113. Because the air vent 112 is communicated with the outside atmosphere, in order to prevent outside moisture from entering the box body 110, the air vent 112 is connected with a waterproof plate 114, and the waterproof plate 114 and the air vent 112 are integrally formed, hinged or clamped and the like. When the box body 110 is installed on a wall surface, the included angle between the waterproof board 114 and the plane where the vent holes 112 are located is less than 45 degrees, and the opening faces the ground. When external water vapor or rainwater reaches the air vent 112, the external water vapor or rainwater flows to the ground along the waterproof plate 114, so that the water vapor or rainwater is blocked to prevent excessive moisture from entering the box body 110 to cause excessive moisture absorption of the flow guide layer 120, water flow is gradually accumulated in the box body 110, and the service life of the box body 110 is shortened due to rusting (when the box body 110 is made of metal) or embrittlement (when the box body 110 is made of plastic).

Referring to fig. 5, fig. 5 is a schematic structural diagram of a spacer fabric of a protective layer 150 according to an embodiment of the present invention. The outer side of the case 110 and/or the exhaust pipe 130 is provided with a gas-permeable protective layer 150. The exhaust pipe 130 is buried in the bed when installed, and in this embodiment the exhaust pipe 130 is coated with a spacer fabric to prevent particulate matter in the bed from blocking the through holes 131. The pores of the surface layer 122 and the inner layer 122 of the spacer fabric are small, when the particulate matter falls under the action of gravity and contacts the surface layer 121 of the spacer fabric, the particles are separated and accumulated inside the fibers, and are continuously deposited in the spacer fibers within a short time, so that the pores of the spacer fabric are gradually reduced, the secondary falling particles are shielded by the pores, and the particles are prevented from blocking the through holes 131. In addition, the surface layer 122 and the inner layer 122 of the spacer fabric are connected through yarns to have a certain supporting effect, and have certain elasticity in the vertical direction of the fabric surface, so that when the box body 110 and the exhaust pipe 130 are expanded with heat and contracted with cold, the spacer fabric adhered to the outer side of the box body has a certain relieving effect, and the phenomenon of bulging caused by wall compression and slope layer finding is avoided. Alternatively, the fabric may be a non-woven fabric, fibers in the non-woven fabric are in a disordered arrangement state, and pores formed by the fibers staggered transversely and alternately are smaller, so that the particles in the slope finding layer can be prevented from falling to block the through holes 131. The protective layer 150 may also be a gas permeable membrane, which has smaller pores and better barrier properties. In addition, the fabric and the air permeable film have good flexibility, and can be more closely fitted to the shapes of the case 110 and the exhaust pipe 130.

In order to prevent the exhaust box 100 for a roof from expanding with heat and contracting with cold due to the change of the external environment, which may cause the wall to be pressed and the slope layer to be hit, the protection layer 150 is a flexible phase change energy storage plate (not shown). The phase change energy storage plate is installed at the outer sides of the box body 110 and the exhaust pipe 130 through screws, and when the external environment temperature is high, the phase change material in the phase change energy storage plate changes phase (for example, the solid material is melted to be changed into the liquid material) to absorb and store a large amount of latent heat; when the temperature of the external environment is reduced, the stored heat is radiated to the environment to carry out reverse phase change from liquid state to solid state. The phase change material in the phase change energy storage plate absorbs or releases heat so as to keep the stability of the shape of the phase change energy storage plate, and the problem that the exhaust box 100 for the roof expands with heat and contracts with cold due to the external temperature is solved.

The utility model provides a roofing is with exhaust box 100's theory of operation:

the utility model provides a roofing is with exhaust box 100, it includes box body 110 and blast pipe 130, and air inlet 111 and exhaust hole 112 have been seted up respectively to box body 110, and blast pipe 130 is linked together with air inlet 111, has seted up through-hole 131 on the blast pipe 130, and box body 110 inner wall is provided with the water conservancy diversion layer 120 that is used for breathing freely to absorb water with blast pipe 130 inner wall, and box body 110 is equipped with the hem. Other moisture-carrying materials in the slope finding layer enter the exhaust pipe 130 from the through hole 131 and enter the exhaust hole 112 in the box body 110 to be exhausted to the external atmosphere environment, the flow guide layer 120 absorbs the moisture into the interior of the slope finding layer and then slowly evaporates and exhausts the moisture, and the water-carrying materials have a certain relieving effect and solve the problems caused by moisture evaporation and gas contraction and expansion in the heat insulation layer to a certain extent. The case 110 with the folded edge makes it air-tight and waterproof. The box body 110 is provided with an oblate mounting hole 113 for facilitating installation, and the exhaust hole 112 is connected with a waterproof plate 114 for preventing external water vapor from entering the box body 110. Alternatively, the flow guiding layer 120 is a porous soft absorbent resin plate with pores communicated with each other, and the surface of the flow guiding layer is provided with capillaries which allow water to actively migrate into the porous soft absorbent resin plate. The flow guiding layer 120 may also be a hot air non-woven fabric having a surface layer 121 and an inner layer 122, the surface layer 121 being an ultrafine fiber, and the inner layer 122 being a coarse denier fiber. The surface layer 122 and the inner layer 122 of the hot air non-woven fabric form a differential capillary effect, so that the moisture is accelerated to automatically guide from the inner layer 122 to the surface layer 121, and the moisture is far away from the slope finding layer, thereby eliminating potential factors influencing the leakage of the roof. In addition, a fluffy layer 140 for absorbing and retaining liquid is arranged in the box body 110, and the fluffy layer 140 is positioned at the inner side of the flow guide layer 120, so that the capillary effect can be further enhanced, and a large amount of water can be absorbed and stored in a short time. Preferably, the lofty layer 140 is loose absorbent fibers. In order to prevent particulate matter in the slope layer from blocking the through-holes 131, the exterior of the box body 110 and/or the exhaust pipe 130 is provided with a gas-permeable protective layer 150. Optionally, the protective layer 150 is a fabric or breathable film. The protective layer 150 may also be a flexible phase change energy storage plate, which maintains the stability of the shape of the exhaust box 100 for a roof by using the characteristics of phase change materials, and avoids the phenomenon of expansion and contraction due to heat caused by external temperature, which may cause the waterproof layer to bulge, or even cause the roof to leak due to cracking.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a roofing is with exhaust box, its characterized in that, includes box body and blast pipe, air inlet and exhaust hole have been seted up respectively to the box body, the blast pipe with the air inlet is linked together, the through-hole has been seted up on the blast pipe, the box body inner wall with the blast pipe inner wall is provided with the water conservancy diversion layer that is used for ventilative water absorption, the box body is equipped with the hem.

2. The exhaust box for roof covering according to claim 1, wherein the box body is provided with an oblate mounting hole.

3. The vent box for roofing defined in claim 1 wherein a flashing is attached to the vent hole.

4. The exhaust box for roof covering according to claim 1, wherein the flow guide layer is a porous water absorbent resin soft board with communicated pores.

5. The vent box as claimed in claim 1, wherein the flow guide layer is a hot air non-woven fabric having a surface layer and an inner layer, the surface layer is made of ultra fine fiber, and the inner layer is made of coarse denier fiber.

6. The vent box for roof covering according to claim 1, wherein a fluffy layer for absorbing and retaining liquid is arranged in the box body, and the fluffy layer is positioned on the inner side of the flow guide layer.

7. The vent box for roofing defined in claim 6 wherein the lofty layer is loose, water absorbent fibers.

8. Air box according to claim 1, characterised in that the box body and/or the air outlet pipe are provided with a gas-permeable protective layer on the outside.

9. The vent box for roofing defined in claim 8 wherein the protective layer is a fabric or breathable membrane.

10. The vent box for roofing defined in claim 8 wherein the protective layer is a flexible phase change energy storage panel.