CN219926448U - Device for preparing brick making raw materials by using washing waste mud - Google Patents

Abstract

The utility model belongs to the technical field of washing waste mud recycling equipment, and provides a device for preparing brickmaking raw materials by using washing waste mud, which comprises a supporting frame, wherein the top of the supporting frame is hinged with a drying shell, two ends of the drying shell are respectively provided with openings, a hydraulic cylinder is hinged between the bottom of the drying shell and the supporting frame, a dehydration unit is arranged in the drying shell, a feeding hopper is arranged between one end of the drying shell, which is far away from a hinged point, of the drying shell and the dehydration unit, a drying unit is arranged between the dehydration unit and the supporting frame, a grinding unit and a raw material stirring unit are arranged in the supporting frame from top to bottom, a feeding hole of the grinding unit is correspondingly arranged with a discharging hole of the dehydration unit, and a discharging hole of the grinding unit is correspondingly arranged with a feeding hole of the raw material stirring unit. The utility model can dry and grind the primarily dehydrated washing waste mud and automatically mix and prepare the brick making mud raw materials.

Description

Device for preparing brick making raw materials by using washing waste mud

Technical Field

The utility model belongs to the technical field of washing waste mud recovery equipment, and particularly relates to a device for preparing brick making raw materials by using washing waste mud.

Background

At present, along with the continuous development of economy and society, the continuous development of urban capital construction, building concrete mixing plant quantity is continuously increased, and in order to satisfy the environmental protection requirement, the smoke and dust that produces in the concrete mixing process needs continuous water spray to restrain, simultaneously, the concrete mixer truck can pass through washing mechanism before driving away the mixing plant, with the powder that adheres to on the automobile body, from this, can produce a large amount of washing waste water in the production process, and there is a large amount of waste silt and sand in the washing waste water, wash waste mud promptly. The washing waste mud is a waste which is difficult to treat, and most of the waste mud flows into river channels and ditches in the past, so that the waste mud can cause sedimentation and muddy water quality. Later through the renovation, washing waste water has obtained the recycle, but washing waste mud can't obtain reasonable use, can only pile up on spot.

The water washing waste mud brick making is realized by uniformly mixing the water washing waste mud, about 10% of cement, 1% of curing agent and other raw materials, and the water washing waste mud brick making can be fully recycled by utilizing the water washing waste mud. The waste water-washing mud for making bricks has a very dry and fine texture, ensures that the water content is well controlled, and can be fully stirred with cement and curing agent without agglomeration during stirring. However, the primarily dewatered water-washed waste mud has large humidity and large particle size, and cannot be directly utilized because of not meeting the production requirement, which hinders the development of mass production of bricks made of the water-washed waste mud, so that there is a need for a device for preparing brick raw materials by utilizing the water-washed waste mud, which can dry and grind the primarily dewatered water-washed waste mud and automatically mix and prepare brick raw materials.

Disclosure of Invention

The utility model aims to provide a device for preparing brickmaking raw materials by using washing waste mud, which solves the problems and achieves the purposes of automatically drying and grinding the washing waste mud which is preliminarily dehydrated and automatically mixing and preparing brickmaking raw materials.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides an utilize device of washing waste mud configuration brickmaking raw materials, includes braced frame, braced frame's top articulates there is dry shell, dry shell's both ends are the opening setting respectively, dry shell's bottom with articulated between the braced frame has the pneumatic cylinder, be provided with the dehydration unit in the dry shell, dry shell keep away from the one end of hinge point with be provided with the feeder hopper between the dehydration unit, dry shell is close to the one end bottom of feeder hopper is provided with the delivery port, the dehydration unit with be provided with the stoving unit between the braced frame, be provided with grinding unit and raw materials stirring unit from the top down in the braced frame, grinding unit's feed inlet with the discharge gate of dehydration unit corresponds the setting, grinding unit's discharge gate with the feed inlet of raw materials stirring unit corresponds the setting, the feed inlet of raw materials stirring unit still corresponds the setting with external auxiliary material supply equipment.

Preferably, the dewatering unit comprises a dewatering barrel which is rotationally connected in the drying shell, openings are formed in two ends of the dewatering barrel, a discharging end of the feeding hopper and one end opening of the dewatering barrel are correspondingly arranged, a plurality of water outlet holes are formed in the side wall of the dewatering barrel, filter cloth is fixedly connected to the circumferential side wall of the inner side of the dewatering barrel, and a rotation driving assembly is arranged between the dewatering barrel and the drying shell.

Preferably, the rotation driving assembly comprises a gear ring fixedly sleeved on the circumferential side wall of the dewatering barrel and a first motor fixedly connected to the drying shell, a gear is fixedly sleeved on an output shaft of the first motor, and the gear is meshed with the gear ring.

Preferably, the grinding unit comprises a grinding barrel vertically fixedly connected in the supporting frame, an annular grinding surface is fixedly connected on the inner circumferential side wall of the grinding barrel, the top opening of the annular grinding surface is larger than the bottom opening, a conical grinding roller is rotationally connected in the grinding barrel, the conical grinding roller and the annular grinding surface are coaxially arranged, the outer wall of the conical grinding roller and the inner wall of the annular grinding surface are correspondingly arranged, a first driving assembly is arranged between the conical grinding roller and the supporting frame, a mud inlet hopper is fixedly communicated with the top of the grinding barrel, the mud inlet hopper is correspondingly arranged with one end opening of the dewatering barrel away from the feeding hopper, and a discharge hole is fixedly communicated with the bottom of the grinding barrel and is correspondingly arranged with the raw material stirring unit.

Preferably, the raw materials stirring unit is in including horizontal fixed connection the mixing drum of braced frame bottom, horizontal rotation is connected with the (mixing) shaft in the mixing drum, the (mixing) shaft with be provided with second drive assembly between the mixing drum, fixedly connected with a plurality of stirring vane on the (mixing) shaft, fixedly connected with a plurality of fixed blades on the inner wall of mixing drum, a plurality of fixed blade with a plurality of stirring vane are crisscross to be set up, the top fixedly connected with washing mud import and the auxiliary material import of mixing drum, washing mud import with the auxiliary material import respectively with the inside intercommunication of mixing drum, washing mud import with the discharge gate corresponds the setting, washing mud import with fixed wear to be equipped with the spray pipe between the auxiliary material import, the spray pipe with the inside correspondence of mixing drum sets up.

Preferably, the drying unit comprises a combustion furnace fixedly connected in the supporting frame and a gas distribution pipe fixedly connected on the side wall of the drying shell, a plurality of gas nozzles are communicated on the side wall of the gas distribution pipe, the gas outlet ends of the gas nozzles are communicated with the inside of the drying shell, the bottom of the gas distribution pipe is provided with an air inlet, the air outlet end of the combustion furnace is communicated with an air outlet through a pipeline, and the air inlet and the air outlet are correspondingly arranged.

Compared with the prior art, the utility model has the following advantages and technical effects: the hydraulic cylinder has the main function that after the washing waste mud is dehydrated and dried, the drying shell is pushed to rotate around the hinge shaft of the drying shell, so that the dehydration unit is inclined by a certain angle, and the dried washing waste mud is poured into the drying unit; the main function of the dehydration unit is to further dehydrate the primarily dehydrated washing waste mud by utilizing centrifugal force; the main function of the drying unit is to dry the washing waste mud in the dehydration unit after the dehydration of the washing waste mud is completed; the main function of the grinding unit is to grind the dehydrated and dried washing waste mud so that the particle size of the washing waste mud meets the requirements of brickmaking on raw materials; the main function of the raw material stirring unit is to stir and mix the ground washing waste mud with cement, curing agent and the like to prepare the brick making raw material capable of pressing green bricks in a die. In the whole, the utility model can dry and grind the primarily dehydrated washing waste mud to ensure that the washing waste mud meets the particle size requirement of brick making, and automatically mix and configure the ground washing waste mud with cement, curing agent and the like to prepare raw materials for pressing green bricks.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front sectional view of a brick making raw material preparing device of the present utility model;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is a right side view of the material stirring unit of the present utility model;

FIG. 4 is a front view of the dehydrating tub of the present utility model;

wherein, 1, a supporting frame; 2. drying the outer shell; 3. a dehydration barrel; 4. a gear ring; 5. a first motor; 6. a feed hopper; 7. a hydraulic cylinder; 8. a gas distribution pipe; 9. a combustion furnace; 10. an air jet; 11. a mud inlet hopper; 12. an annular abrasive surface; 13. a tapered grinding roller; 14. a second motor; 15. an air outlet; 16. a mixing drum; 17. a stirring shaft; 18. stirring blades; 19. a fixed blade; 20. a discharge port; 21. a water outlet hole; 22. a filter cloth; 23. a water outlet; 24. a water spray pipe; 25. a third motor; 26. a discharge valve; 27. an air inlet; 28. washing a mud inlet; 29. an auxiliary material inlet; 30. and (3) grinding the barrel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1-4, the utility model provides a device for preparing brickmaking raw materials by using washing waste mud, which comprises a supporting frame 1, wherein the top of the supporting frame 1 is hinged with a drying shell 2, two ends of the drying shell 2 are respectively provided with openings, a hydraulic cylinder 7 is hinged between the bottom of the drying shell 2 and the supporting frame 1, a dehydration unit is arranged in the drying shell 2, a feed hopper 6 is arranged between one end, far away from a hinged point, of the drying shell 2 and the dehydration unit, a water outlet 23 is arranged at the bottom of one end, close to the feed hopper 6, of the drying shell 2, a drying unit is arranged between the dehydration unit and the supporting frame 1, a grinding unit and a raw material stirring unit are arranged in the supporting frame 1 from top to bottom, a feed inlet of the grinding unit is correspondingly arranged with a feed inlet of the raw material stirring unit, and a feed inlet of the raw material stirring unit is correspondingly arranged with external auxiliary material supply equipment.

The hydraulic cylinder 7 has the main function of tilting the dehydration unit by a certain angle by pushing the drying shell 2 to rotate around the hinge shaft after the dehydration of the washing waste mud and drying are finished, and pouring the dried washing waste mud into the drying unit; the main function of the dehydration unit is to further dehydrate the primarily dehydrated washing waste mud by utilizing centrifugal force; the main function of the drying unit is to dry the washing waste mud in the dehydration unit after the dehydration of the washing waste mud is completed; the main function of the grinding unit is to grind the dehydrated and dried washing waste mud so that the particle size of the washing waste mud meets the requirements of brickmaking on raw materials; the main function of the raw material stirring unit is to stir and mix the ground washing waste mud with cement, curing agent and the like to prepare the brick making raw material capable of pressing green bricks in a die. In the whole, the utility model can dry and grind the primarily dehydrated washing waste mud to ensure that the washing waste mud meets the particle size requirement of brick making, and automatically mix and configure the ground washing waste mud with cement, curing agent and the like to prepare raw materials for pressing green bricks.

Further optimizing scheme, the dehydration unit is including rotating the dehydration bucket 3 of connecting in drying shell 2, and the both ends of dehydration bucket 3 are provided with the opening, and the discharge end of feeder hopper 6 corresponds the setting with the one end opening of dehydration bucket 3, has seted up a plurality of apopores 21 on the lateral wall of dehydration bucket 3, fixedly connected with filter cloth 22 on the circumference lateral wall of dehydration bucket 3 inboard, is provided with rotation drive assembly between dehydration bucket 3 and the drying shell 2.

Further optimizing scheme, rotate the drive assembly including fixed cover establish the ring gear 4 on dewatering barrel 3 circumference lateral wall and fixed connection on drying shell 2 first motor 5, fixed cover is equipped with the gear on the output shaft of first motor 5, and the gear meshes with ring gear 4 mutually.

After the primarily dehydrated washing waste mud is poured into the dehydration barrel 3 through the feed hopper 6, the first motor 5 is started, the first motor 5 rotates to drive the gear to rotate, the gear rotates to drive the gear ring 4 to rotate, the gear ring 4 drives the dehydration barrel 3 to rotate at a high speed in the drying shell 2, water in the washing waste mud is thrown away from the dehydration barrel 3 through the filter cloth 22 and the plurality of water outlets 21 under the action of centrifugal force, and the thrown water gathers in the drying shell 2 and flows out from the water outlets 23 to enter the subsequent treatment work. The main function of the filter cloth is to prevent excess washing sludge from being thrown out of the water outlet holes 21 during the spin-drying process.

Further optimizing scheme, the grinding unit includes vertical fixed connection grinding drum 30 in braced frame 1, fixedly connected with annular grinding face 12 on the inboard circumference lateral wall of grinding drum 30, annular grinding face 12's open top is greater than bottom opening, grinding drum 30 internal rotation is connected with toper grinding roller 13, toper grinding roller 13 and annular grinding face 12 coaxial line set up, the outer wall of toper grinding roller 13 corresponds the setting with annular grinding face 12's inner wall, be provided with first drive assembly between toper grinding roller 13 and braced frame 1, the fixed intercommunication in top of grinding drum 30 has into mud bucket 11, it corresponds the setting to advance mud bucket 11 and the one end opening that the dehydration bucket 3 kept away from feeder hopper 6, the fixed intercommunication in bottom of grinding drum 30 has discharge gate 20, discharge gate 20 corresponds the setting with the raw materials stirring unit.

Further preferably, the first driving assembly comprises a second motor 14 vertically and fixedly connected in the supporting frame 1, and an output shaft of the second motor 14 is fixedly connected with the bottom of the conical grinding roller 13 coaxially through a connecting rod.

When the washing waste mud is dehydrated and dried, the hydraulic cylinder 7 stretches to push the drying shell 2 to rotate around the hinge shaft of the drying shell to enable the dehydration barrel 3 to incline synchronously, meanwhile, the first motor 5 is enabled to operate, the dehydration barrel 3 is driven to rotate slowly through the gear and the gear ring 4, the washing waste mud in the dehydration barrel is separated from the dehydration barrel 3 and falls into the mud inlet bucket 11, and after the washing waste mud enters into the mud inlet bucket 11, the washing waste mud flows into a gap between the conical grinding roller 13 and the annular grinding surface 12 from the mud inlet bucket 11.

The gap between the tapered grinding roller 13 and the annular grinding surface 12 is in a state of decreasing in size from top to bottom to ensure sufficient grinding. The second motor 14 is started, the second motor 14 rotates to drive the conical grinding roller 13 to rotate, relative motion is generated between the outer wall surface of the conical grinding roller 13 and the annular grinding surface 12, the washing waste mud is repeatedly rolled in a gap between the conical grinding roller 13 and the annular grinding surface 12, and meanwhile, the washing waste mud moves downwards under the action of gravity and is ground more and less. When the washing waste mud falls onto the discharge port 20 from the bottom of the gap between the conical grinding roller 13 and the annular grinding surface 12, the grinding is completed, and the required particle size requirement is achieved.

Further optimizing scheme, the raw materials stirring unit includes horizontal fixed connection in the mixing drum 16 of braced frame 1 bottom, horizontal rotation is connected with (mixing) shaft 17 in the mixing drum 16, be provided with second drive assembly between (mixing) shaft 17 and the mixing drum 16, fixedly connected with a plurality of stirring vane 18 on the (mixing) shaft 17, fixedly connected with a plurality of fixed vane 19 on the inner wall of mixing drum 16, a plurality of fixed vane 19 and a plurality of stirring vane 18 crisscross setting, the top fixedly connected with washing mud inlet 28 and auxiliary material import 29 of mixing drum 16, washing mud inlet 28 and auxiliary material import 29 respectively with the inside intercommunication of mixing drum 16, washing mud import 28 corresponds the setting with discharge gate 20, fixed wear to have spray pipe 24 between washing mud inlet 28 and the auxiliary material import 29, spray pipe 24 corresponds the setting with the mixing drum 16 inside.

In a further optimized scheme, the second driving assembly comprises a third motor 25 fixedly connected to the side wall of one end of the mixing drum 16, and an output shaft of the third motor 25 penetrates through the side wall of the mixing drum 16 and is fixedly connected with the stirring shaft 17 coaxially.

The ground washing waste sludge slides down from the discharge port 20, falls into the washing sludge inlet 28, and finally enters the mixing tub 16, and at the same time, the external equipment pours cement, curing agent, etc. into the mixing tub 16 from the auxiliary material inlet 29. The third motor 25 is started, the stirring shaft 17 is driven to rotate by the rotation of the third motor 25, the stirring shaft 17 drives the stirring blades 18 on the stirring shaft to rotate, and when the stirring blades 18 stir the mixed raw materials of the waste cement, the cement and the curing agent, the mixed raw materials can collide and squeeze with the fixed blades 19, so that the stirring efficiency is improved. The water spray pipe 24 is connected to an external water supply device, and water can be sprayed into the mixing tub 16 through the water spray pipe 24 when the raw materials are mixed in the stirring arrangement.

Further preferably, the bottom of the mixing drum 16 is connected to a discharge valve 26.

The brick making raw materials after the configuration can be discharged through a discharge valve 26 and enter the subsequent brick making process.

Further optimizing scheme, the stoving unit includes combustion furnace 9 and the gas distribution pipe 8 of fixed connection on drying shell 2 lateral wall in braced frame 1, and the intercommunication has a plurality of jet 10 on the lateral wall of gas distribution pipe 8, and the inside intercommunication of the end and drying shell 2 of giving vent to anger of jet 10, air intake 27 has been seted up to the bottom of gas distribution pipe 8, and the air-out end of combustion furnace 9 has air outlet 15 through the pipeline intercommunication, and air intake 27 corresponds the setting with air outlet 15.

After the dehydration process of the washing waste mud is completed, the combustion furnace 9 is started, and hot gas generated by the combustion furnace 9 enters the gas distribution pipe 8 through the air outlet 15 and the air inlet 27. The hot air in the air distribution pipe 8 enters the drying shell 2 through the plurality of air nozzles 10, so that the temperature of the air in the drying shell 2 is raised, the dewatering barrel 3 is heated, and the washing waste mud is directly heated through the plurality of water outlets 21, so that the evaporation of the residual moisture in the washing waste mud is accelerated. In order to accelerate the drying speed, the first motor 5 can be started, so that the first motor 5 drives the dewatering barrel 3 to slowly rotate through the gear and the gear ring 4, the washing waste mud in the dewatering barrel 3 is stirred, and the water evaporation is further accelerated.

The air inlet 27 is attached to the air outlet 15, and when the drying shell 2 is lifted by the hydraulic cylinder 7, the air inlet 27 is separated from the air outlet 15, so that the waste mud pouring and washing work is ensured to be smoothly carried out; when the drying shell 2 is put down, the air inlet 27 and the air outlet 15 are attached again, so that the hot air in the combustion furnace 9 can smoothly enter the drying shell 2.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims (6)

1. A device for preparing brick making raw materials by using washing waste mud is characterized in that: including braced frame (1), the top of braced frame (1) articulates there is dry shell (2), the both ends of dry shell (2) are the opening setting respectively, the bottom of dry shell (2) with articulated between braced frame (1) have pneumatic cylinder (7), be provided with the dehydration unit in dry shell (2), the one end that articulated point was kept away from to dry shell (2) with be provided with feeder hopper (6) between the dehydration unit, dry shell (2) are close to the one end bottom of feeder hopper (6) is provided with delivery port (23), the dehydration unit with be provided with stoving unit between braced frame (1), be provided with grinding unit and raw materials stirring unit in braced frame (1) from the top down, the feed inlet of grinding unit with the discharge gate of dehydration unit corresponds the setting, the discharge gate of grinding unit with the feed inlet of raw materials stirring unit corresponds the setting with external auxiliary material supply equipment.

2. The apparatus for preparing brick making raw material by using the washing waste mud according to claim 1, wherein: the dewatering unit is in including rotating connection dewatering barrel (3) in drying shell (2), the both ends of dewatering barrel (3) are provided with the opening, the discharge end of feeder hopper (6) with the one end opening of dewatering barrel (3) corresponds the setting, a plurality of apopores (21) have been seted up on the lateral wall of dewatering barrel (3), fixedly connected with filter cloth (22) on the circumference lateral wall of dewatering barrel (3) inboard, dewatering barrel (3) with be provided with between drying shell (2) and rotate drive assembly.

3. The apparatus for preparing brick making raw material by using the washing waste mud according to claim 2, wherein: the rotary driving assembly comprises a gear ring (4) fixedly sleeved on the circumferential side wall of the dewatering barrel (3) and a first motor (5) fixedly connected to the drying shell (2), a gear is fixedly sleeved on an output shaft of the first motor (5), and the gear is meshed with the gear ring (4).

4. The apparatus for preparing brick making raw material by using the washing waste mud according to claim 2, wherein: the grinding unit comprises a grinding barrel (30) which is vertically and fixedly connected in a supporting frame (1), an annular grinding surface (12) is fixedly connected to the inner circumferential side wall of the grinding barrel (30), the top opening of the annular grinding surface (12) is larger than the bottom opening, a conical grinding roller (13) is rotationally connected to the grinding barrel (30), the conical grinding roller (13) and the annular grinding surface (12) are coaxially arranged, the outer wall of the conical grinding roller (13) and the inner wall of the annular grinding surface (12) are correspondingly arranged, a first driving assembly is arranged between the conical grinding roller (13) and the supporting frame (1), a mud inlet hopper (11) is fixedly communicated with the top of the grinding barrel (30), the mud inlet hopper (11) and one end opening of the dewatering barrel (3) are far away from the feed hopper (6), a discharge port (20) is fixedly communicated with the bottom of the grinding barrel (30), and the discharge port (20) and the raw material stirring unit are correspondingly arranged.

5. The apparatus for preparing brick making raw material by using the washing waste mud according to claim 4, wherein: the raw material stirring unit comprises a mixing drum (16) which is transversely and fixedly connected to the bottom of a supporting frame (1), a stirring shaft (17) is connected in the mixing drum (16) in a horizontal rotation mode, a second driving assembly is arranged between the stirring shaft (17) and the mixing drum (16), a plurality of stirring blades (18) are fixedly connected to the stirring shaft (17), a plurality of fixing blades (19) are fixedly connected to the inner wall of the mixing drum (16), a plurality of fixing blades (19) and a plurality of stirring blades (18) are arranged in a staggered mode, a water-mud inlet (28) and an auxiliary material inlet (29) are fixedly connected to the top of the mixing drum (16), the water-mud inlet (28) and the auxiliary material inlet (29) are respectively communicated with the inside of the mixing drum (16), the water-mud inlet (28) and the discharge port (20) are correspondingly arranged, a water spray pipe (24) is fixedly arranged between the water-mud inlet (28) and the auxiliary material inlet (29), and the water spray pipe (24) and the inside of the mixing drum (16) are correspondingly arranged.

6. The apparatus for preparing brick making raw material by using the washing waste mud according to claim 2, wherein: the drying unit comprises a combustion furnace (9) fixedly connected in the supporting frame (1) and a gas distribution pipe (8) fixedly connected to the side wall of the drying shell (2), a plurality of gas nozzles (10) are communicated to the side wall of the gas distribution pipe (8), the gas outlet ends of the gas nozzles (10) are communicated with the inside of the drying shell (2), an air inlet (27) is formed in the bottom of the gas distribution pipe (8), the air outlet end of the combustion furnace (9) is communicated with an air outlet (15) through a pipeline, and the air inlet (27) is correspondingly arranged with the air outlet (15).