RU2780754C2 - Ventilation duct system - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: invention relates to the field of a railway refrigerator rolling stock and more specifically to a ventilation duct system. The ventilation duct system, in one option, includes first part (10) directing an airflow, including upper plate (11) and first lower plate (12) located below upper plate (11), and second part (20) directing an airflow, connected to first part (10). First lower plate (12) and upper plate (11) have a gap between them, and the first ventilation duct is located between first lower plate (12) and upper plate (11). The second ventilation duct is located in second part (20), and it communicates with the first ventilation duct. Upper plate (11) and second part (20) have an arc-shaped structure. Convex extension of second part (20) and upper plate (11) are facing in one direction. In another option, upper plate (11) and first lower plate (12) are connected by means of first installation site (30) including the first folded plate connected to upper plate (11), the second folded plate connected to first lower plate (12), and the third folded plate connected to the first folded plate and the second folded plate. The third folded plate is located between upper plate (11) and first lower plate (12). At least one ventilation hole is made in the third folded plate.

EFFECT: invention solves the problem of a large volume of a ventilation duct system, existing in this field of technology.

12 cl, 10 dwg

Description

Technical field

The present disclosure relates to the field of railway refrigeration rolling stock and more specifically to a ventilation duct system.

Prerequisites for creating an invention

The uniformity of the internal temperature of a refrigerated railway car has a great influence on the preservation of good quality of refrigerated goods during transportation. Of great importance for maintaining the quality of refrigerated goods is the management of the temperature of refrigerated goods and their storage at the required temperature and even in an environment of its uniform distribution. The system of ventilation ducts in the upper part of a refrigerated railway car is closely related to the temperature distribution inside the car. The thoughtful design of the ventilation duct system is one of the main factors for ensuring the quality of refrigerated cargo. In the prior art, the first bottom plate of the ventilation duct system at the top of the refrigerated railway car is connected directly to the body of the refrigerated car. The problem of the ventilation duct system is its large volume, as a result of which the volume of the cargo compartment of the refrigerated car is reduced.

Disclosure of invention

In some embodiments, the implementation of the present disclosure provides a system of ventilation ducts, designed to solve known in this area a large volume system of ventilation ducts.

In order to solve this problem, in some embodiments of the present disclosure, a system of ventilation ducts is proposed, including: a first part guiding the air flow and including a top plate and a first bottom plate, the first bottom plate being located below the top plate, and the first bottom plate and the top plate have a gap between them, and moreover, the first ventilation channel is located between the first bottom plate and the top plate; and a second air flow guiding part, wherein the second air flow guiding part is connected to the first air flow guiding part, and the second ventilation duct is located in the second air flow guiding part and communicates with the first ventilation duct.

In one exemplary embodiment, the top plate has an arcuate structure, the second airflow guide portion has an arcuate structure, and the convex extension of the second airflow guide portion and the convex extension of the top plate face the same direction.

In one exemplary embodiment, the second airflow directing portion includes: a first arcuate plate, wherein one end of the first arcuate plate is connected to the top plate, and a second arcuate plate, where one end of the second arcuate plate is connected to the first bottom plate, a second arcuate plate, and the first arcuate plate have a gap between them, and the second ventilation channel is located between the second arcuate plate and the first arcuate plate.

In one exemplary embodiment, the first arcuate plate and the top plate are of an integral design, and the second arcuate plate includes: a first connecting segment connected to the first bottom plate, an arcuate segment, with one end of the arcuate segment connected to the first connecting segment; and a second connecting segment connected to the other end of the arcuate segment.

In one exemplary embodiment, the ventilation duct system also includes a first mounting location, wherein the top plate and the first bottom plate are connected via the first mounting location.

In one exemplary embodiment, the first seat includes: a first pleated plate connected to a top plate, a second pleated plate connected to a first bottom plate, and a third folded plate connected to the first folded plate and the second folded plate, the third folded plate being located between an upper plate and a first lower plate, and at least one vent is located on the third pleated plate.

In one exemplary embodiment, a plurality of vents are provided, the plurality of vents being spaced on the third pleated plate at intervals in the length direction of the third pleated plate.

In one exemplary embodiment, the ventilation duct system also includes a second locus connected at one end away from the first airflow guiding portion, the second airflow guiding portion, the second locus being configured to fix the second airflow guiding portion .

In one exemplary embodiment, the ventilation duct system also includes an air flow directing third part, wherein one end of the third air flow directing part is connected to the end of the first bottom plate, the other end of the third air flow directing part is connected to the air conditioning unit, moreover, the air inlet channel is located in the third part, directing the air flow, and communicates with the first ventilation channel.

In one exemplary embodiment, the third airflow guiding portion includes an inclined plate connected to the first bottom plate, an included angle formed between the inclined plate and the first bottom plate, and a side plate connected to the inclined plate, the air inlet channel being formed between the inclined plate. plate, side plate and top plate.

In one exemplary embodiment, the ventilation duct system also includes a support portion located below the third airflow guide portion, the support portion being configured to support the third airflow guide portion.

In one exemplary embodiment, the support part is a support rod, wherein the length of the support rod is adjustable and the end part of the support rod is connected to a second air flow guide part.

When applying the technical solution of some embodiments of the present disclosure, the first air flow guiding part and the second air flow guiding part are located in the ventilation duct system, and the first ventilation duct in the first air flow guiding part communicates with the second ventilation duct in the second part. directing the air flow. Thus, after the ventilation duct system is installed in the refrigerated car body, the first bottom plate of the first air flow guiding part can be removed from the car body for some distance, so that the volume of the ventilation duct system can be reduced, and the volume of the cargo compartment of the refrigerated car can be increased.

Brief description of the drawings

The accompanying drawings, which are part of this application, are used to provide a better understanding of the present disclosure, and exemplary embodiments of the present disclosure and their description are used to explain the present disclosure, but do not impose unnecessary restrictions on the present disclosure. On the drawings:

Fig. 1 is a structural diagram of a ventilation duct system according to one embodiment of the present disclosure.

Fig. 2 is a sectional view of the ventilation duct system of FIG. 1 in position A-A.

Fig. 3 is a diagram of the construction of the second arcuate plate of FIG. 2.

Fig. 4 is a diagram of the construction of the first mounting location of FIG. 2

Fig. 5 is a side view of the first seat of FIG. four.

Fig. 6 is a structural diagram of the first bottom plate of FIG. 2.

Fig. 7 is a diagram of the structure of the second mounting location of FIG. 2.

Fig. 8 is a partial sectional view of the ventilation duct system of FIG. 1 in position B-B.

Fig. 9 is a diagram of the construction of the third airflow guiding part of the ventilation duct system of FIG. one.

Fig. 10 is a sectional view of the ventilation duct system of FIG. 1 in position C-C.

The drawings include the following reference symbols:

10: the first part directing the air flow; 11: top plate; 12: first bottom plate; 20: second part directing the air flow; 21: first arcuate plate; 22: second arcuate plate; 22a: first connecting segment; 22b: arcuate segment; 22c: second connecting segment; 30: first installation location; 31: first folded plate; 32: second pleated plate; 33: third folded plate; 33a: ventilation hole; 40: second mounting location; 50: car body; 60: third part directing the air flow; 61: inclined plate; 62: side plate; 70: support part.

Detailed description of embodiments

The technical solutions of the embodiments of the present disclosure will be clearly and fully described below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments constitute only a part, but not all, embodiments of the present disclosure. In the following description, at least one exemplary embodiment is provided for illustrative purposes only and is not used as a limitation on the present disclosure, the present application, or its use. Based on the embodiments of the present disclosure, all other embodiments obtained in the absence of creative activity of ordinary specialists in this field of technology fall within the protection scope of this disclosure.

As shown in FIG. 1 - Fig. 10, one embodiment of the present disclosure provides a ventilation duct system that includes a first airflow guide portion 10 and a second airflow guide portion 20. The first part 10 directing the air flow includes a top plate 11 and a first bottom plate 12, the first bottom plate 12 is located below the top plate 11, the first bottom plate 12 and the top plate 11 are located with a certain gap between them, and the first ventilation channel is formed between the first lower plate 12 and the upper plate 11. The second air flow guide part 20 is connected to the first air flow guide part 10, the second ventilation duct is located in the second air flow guide part 20 and communicates with the first ventilation duct.

In applying the technical solution of this embodiment, the first air flow guiding part 10 and the second air flow guiding part 20 are located in the ventilation duct system, and the first ventilation duct in the first air flow guiding part 10 communicates with the second ventilation duct in the second part 20, directing the air flow. Thus, after the ventilation duct system is installed in the refrigerated car body 50, the first bottom plate of the first air flow guide part can be separated from the car body 50 by some distance, so that the volume of the ventilation duct system can be reduced, and the volume of the cargo compartment of the refrigerated wagon can be increased. Moreover, the area between the top plate 11 and the first bottom plate 12 directly forms the first ventilation duct, so that the construction of the ventilation duct system can also be simplified by reducing the weight of the ventilation duct system.

As shown in FIG. 1, in this embodiment, the top plate 11 has an arcuate structure. By making the top plate 11 arc-shaped, on the one hand, the structural strength of the top plate 11 can be improved and deformation of the top plate 11 can be prevented, and on the other hand, accumulation of rain particles, dust, and the like. on the top plate 11 can be excluded. The second airflow guide portion 20 has an arcuate structure, with the convex extension of the second airflow guide portion 20 and the convex extension of the top plate 11 facing the same direction. In this way, on the one hand, the structural strength of the second air flow guide part 20 can be increased and deformation of the second air flow guide part 20 can be prevented, and on the other hand, the volume of the cargo compartment can be increased so that the refrigerated wagon can transport more goods.

In one exemplary embodiment, the second portion 20 directing the air flow includes a first arcuate plate 21 and a second arcuate plate 22. One end of the first arcuate plate 21 is connected to the top plate 11, one end of the second arcuate plate 22 is connected to the first bottom plate 12, the second the arcuate plate 22 and the first arcuate plate 21 are spaced, and the second vent is formed between the second arcuate plate 22 and the first arcuate plate 21. Thus, the refrigerant gas flow can be directed through the arcuate second vent formed between the first arcuate plate 21 and the second arcuate plate 22. Moreover, such an arrangement is simpler in structure, so that the manufacturing cost of the apparatus can be reduced.

In some embodiments, the first arcuate plate 21 and the top plate 11 may be made separately and then connected together, or the first arcuate plate 21 and the top plate 11 may be an integrated structure. Thus, the manufacture of the device can be facilitated, and the structural strength of the device can be improved.

As shown in FIG. 3, the second arcuate plate 22 includes a first connecting segment 22a, an arcuate segment 22b, and a second connecting segment 22c. The first connection section 22a is connected to the first bottom plate 12, one end of the arcuate section 22b is connected to the first connection section 22a, and the second connection section 22c is connected to the other end of the arcuate section 22b. The second arcuate plate 22 can be conveniently assembled from the first connecting section 22a and the second connecting section 22c, which are specially made. The first connecting piece 22a is connected to the first bottom plate 12 by means of a fastener such as a bolt. The first connection section 22a is used to connect to the car body, and the first connection section 22a can also be connected to the car body by a fastener such as a bolt.

In order to reduce the weight of the ventilation duct system and the load on the refrigerator car, in one embodiment of the present disclosure, the first bottom plate 12 is made from a non-metallic material. The first bottom plate 12 may be made of a non-metallic material with good sealing performance, such as an injection molded profile or PVC fabric. The first bottom plate 12 functions mainly for ventilation and may be made of a non-metallic material in order to effectively reduce the weight of the ventilation duct system.

As shown in FIG. 2 and FIG. 4, the ventilation duct system also includes a first seat 30, and the top plate 11 is connected to the first bottom plate 12 via the first seat 30, so that the structural strength of the ventilation duct system can be improved.

In one exemplary embodiment, the first seat 30 includes a first pleated plate 31, a second pleated plate 32, and a third pleated plate 33. The first pleated plate 31 is connected to the top plate 11, the second folded plate 32 is connected to the first bottom plate 12, the third folded plate 33 connected to the first pleated plate 31 and the second pleated plate 32, the third pleated plate 33 is located between the upper plate 11 and the first lower plate 12, and a vent hole 33a is formed on the third pleated plate 33. channel from the first ventilation channel. The first pleated plate 31 may be formed into an arc shape to match the shape of the upper plate 11, thereby improving the sealing performance of the ventilation duct system.

In one exemplary embodiment of the present disclosure, a plurality of vents 33a may be provided, the plurality of vents 33a located on the third pleated plate 33 at intervals along the length direction of the third pleated plate 33. Thus, the refrigerant gas from the first vent can uniformly flow into the second vent at different locations so that the refrigerant gas in the second vent is evenly distributed. Thus, the air blown from the ventilation duct system can be evenly distributed along the length of the car body, so that the temperature in different places in the car body will be the same, thereby ensuring the quality of the transported cargo. In one exemplary embodiment, the vent hole 33a may be provided in a tapered shape, with the length of the tapered hole matching the length direction of the third pleated plate 33.

As shown in FIG. 6, bolt holes are provided on two sides of the first bottom plate 12. Thus, the first bottom plate 12, the first connecting section of the second arcuate plate 22, and the first pleated plate 31 of the first seat 30 can be securely bolted together, so that the structural the strength of the ventilation duct system can be increased. Moreover, the joints of all three match in shape, so that the sealing performance of the ventilation duct system is improved, thereby preventing air leakage.

In one exemplary embodiment as shown in FIG. 2 and FIG. 7, the ventilation duct system includes a second station 40, wherein the second station 40 is connected at one end, away from the first air flow guide part 10, the second air flow guide part 20, and the second station 40 is intended to fix the second part 20 directing the air flow. The second part 20 directing the air flow can be connected to other parts by means of a second mounting location 40, whereby the ventilation duct system is fixed. For example, the ventilation duct system may be attached to the car body by means of a second locating 40. The second locating 40 includes a first fixing plate and a second fixing plate connected to each other, wherein the first fixing plate is connected to the car body, and the second fixing plate is connected with the second connecting segment 22 from the second arcuate plate 22. This arrangement not only ensures a reliable connection of the ventilation duct system and the car body, but also provides a gap between the second arcuate plate 22 and the car body through the second fixing plate, thereby ensuring a smooth exit of air and flow of gaseous refrigerant from the second ventilation duct into the car body. As shown in FIG. 7, the width of the first fixing plate can be made larger than the width of the second fixing plate, wherein a bolt hole is formed on the first fixing plate, and two bolt holes are made on the second fixing plate.

In one embodiment of the present disclosure, two second airflow guide portions 20 are used, with the two second airflow guide portions 20 connected to two side surfaces of the first airflow guide portion 10. Thus, the refrigerant gas can enter the one second air flow guide portion 20 from two sides of the first air flow guide portion 10 and then flow into the car body from the two second air flow guide portions 20. Thus, the temperature inside the car body will be the same to ensure the quality of the cargo in the refrigerated car. In one exemplary embodiment of the present disclosure, the two second airflow guide portions 20 may be symmetrical in shape.

In one embodiment of the present disclosure, which is shown in FIG. 1, Fig. 8 and FIG. 9, the ventilation duct system also includes a third air flow guide portion 60, wherein one end of the third air flow guide portion 60 is connected to an end portion of the first bottom plate 12, the other end of the third air flow guide portion 60 is connected to the air conditioning unit. , the air inlet passage is located in the third air flow guide portion 60, the air inlet passage being in communication with the first ventilation passage. Thus, the gaseous refrigerant supplied by the air conditioning unit can be supplied to the first ventilation passage through the third air flow guide portion 60 . Positioning the third air flow guide portion 60 on the end portion of the first bottom plate 12 allows the refrigerant gas to flow in the lengthwise direction of the first air flow guide portion 10 and then to different locations of the car body 50 through the second air flow guide portion 20 to achieve an enhanced cooling effect.

In one exemplary embodiment, the third air flow guide portion 60 includes an inclined plate 61 and a side plate 62. The inclined plate 61 is connected to the first bottom plate 12, and an included angle is formed between the inclined plate 61 and the first bottom plate 12. In this embodiment, Because the position of the first bottom plate 12 is relatively high, the space occupied by the ventilation duct system is reduced. Due to the inclined position of the inclined plate 61, the refrigerant gas can be guided to flow smoothly into the first ventilation duct from the air conditioning unit. The side plate 62 is connected to the inclined plate 61, and an air inlet path is formed between the inclined plate 61, the side plate 62, and the top plate 11. Thus, the first ventilation duct can be supplemented with several structural elements to ensure its tightness and improve the tightness performance of the ventilation duct system. .

In one embodiment of the present disclosure, the edge portion of the sloping plate 61 is provided with a folded edge in which a bolt hole is made, and the sloping plate 61 is connected to the first bottom plate 12 via the folded edge. Alternatively, the edge portion of the side plate 62 may be provided with a folded edge in which a bolt hole is provided, and the side plate 62 is connected to the second folded plate 32 of the first seat 30 via the folded edge. Thus, the structural strength of the third air flow guide portion 60 can be improved. In this embodiment, the third air flow guide portion 60 can be made of an aluminum profile or aluminum plate, whereby the weight of the third air flow guide portion 60 can be reduced, and increase structural strength.

In one embodiment of the present disclosure, which is shown in FIG. 1 and FIG. 10, the ventilation duct system also includes a support portion 70, wherein the support portion 70 is positioned below the third airflow guide portion 60 and the support portion 70 is configured to support the third airflow guide portion 60. Since the third air flow guide portion 60 is connected to the air supply path from the air conditioning unit, the force acting on the third air flow guide portion 60 is increased. By positioning the support portion 70 below the third air flow guide portion 60, the third air flow guide portion 60 is supported to prevent the third air flow guide portion 60 from being deformed or damaged, thereby increasing the bearing capacity of the third air flow guide portion 60 guiding the air flow, and prolonging the service life of the third part 60 guiding the air flow.

In one exemplary embodiment, the support portion 70 is a support rod, wherein the length of the support rod can be adjusted and the end of the support rod is connected to the second air flow guide portion 20. The end part of the support rod and the second part 20, directing the air flow, are connected to securely fix the support rod and increase the overall structural strength of the device. The support rod adopts a length adjustable design, which is convenient for installing and fixing the support rod. When installed, the support rod is shortened so that it can be easily placed in the desired installation position, and then the length of the support rod is increased to make a connection between the support rod and the second air flow guide part 20. As shown in FIG. 10, the two ends of the support rod are connected to the first arcuate plate 21 of the one second air flow guide part 20, and furthermore, a through hole is provided in the second arcuate plate 22 so that the end portion of the support rod passes through this through hole to connect with the first arcuate the plate 21. Moreover, in this embodiment, the support rod is located below the inclined plate 61. Thus, it is possible to increase the bonding strength of the support rod so as to exert an increased support effect on the third air flow guide portion 60.

When applying the technical solution of the present disclosure, the first air flow guiding part 10 and the second air flow guiding part 20 are located in the ventilation duct system, and the first ventilation duct in the first air flow guiding part 10 communicates with the second ventilation duct in the second part. 20 directing the air flow. Thus, after the ventilation duct system is installed in the refrigerated car body 50, the first bottom plate of the first air flow guide part is separated from the car body 50 by a certain distance, so that the volume of the ventilation duct system is reduced and the cargo compartment volume of the refrigerated car can be increased. Moreover, the area between the top plate 11 and the first bottom plate 12 directly forms the first ventilation duct, so that the structure of the ventilation duct system is also simplified, thereby reducing the weight of the ventilation duct system.

The above describes only some embodiments of the present disclosure, not intended to limit the present disclosure. As those skilled in the art will appreciate, various modifications and changes may be made to the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this disclosure fall within the protection scope of this disclosure.

It should be said that the terms used in this document are only intended to describe specific embodiments and are not intended to limit examples of embodiments of the present application. Unless the context dictates otherwise, the singular forms of terms used herein include the plural forms. In addition, it should also be understood that when the terms "comprise" and/or "include" are used in the description, this refers to features, steps, operations, devices, assemblies, and/or combinations thereof.

Unless otherwise indicated, the relative arrangement of parts and assemblies and steps mentioned in the described embodiments, numerical expressions and numerical values do not limit the scope of the present disclosure. In addition, it should be understood that for convenience of description, the size of each part shown in the drawings does not correspond to the actual proportions. Technologies, methods and devices known to those skilled in the art may not be described in detail. However, where appropriate, technologies, methods and devices should be considered part of the description. In the examples shown and described herein, any specific values are to be understood as only exemplary values and not limiting values. As a result, other exemplary embodiments may have other values. It should be said that the same symbols and letters designate the same objects in the drawings. As a result, if a certain object is specified in one drawing, it will not necessarily be specified in other drawings.

In describing the present disclosure, it is to be understood that terms relating to place such as "front, back, top, bottom, left and right", "horizontal, vertical, perpendicular and parallel", "top and bottom" and their derivatives refer to places arrangements shown on the basis of the drawings, which are only for the convenience and simplicity of describing the present disclosure, without indicating or implying that the corresponding device or element must have a particular location and must be made and work in that particular location, while, accordingly, their should not be understood as limitations of the present disclosure. The location terms "inner and outer" refer to the inner and outer contours of each part.

For ease of description, spatial terms such as "above", "above", "upper surface", and "upper" may be used herein to indicate the spatial position of a device or feature in relation to other devices or features, shown in the drawings. It should be understood that the terms relating to space include various positions in use or operation in addition to the positions of the devices shown in the drawings. For example, if the devices in the drawings are reversed, devices described as "above other devices or structures" or "above other devices or structures" will be located "below other devices or structures" or "under other devices or structures". Thus, by way of example, the term "above" may include two clauses, namely "above" and "below". The device can be located in other positions (be rotated 90 degrees or in other positions), and the description of the spatial positions in this document is explained accordingly.

Additionally, it should be said that the terms "first", "second", etc. are not used to limit details and are only intended to distinguish between relevant details. Unless otherwise indicated, the above terms have no special meaning, so they should not be understood as limiting the scope of protection of the present disclosure.

Claims (37)

1. System of ventilation ducts, including: the first part (10) directing the air flow, including the top plate (11) and the first bottom plate (12), the first bottom plate (12) being located below the top plate (11), the first bottom plate (12) and the top plate (11 ) have a gap between them, and the first ventilation channel is located between the first bottom plate (12) and the top plate (11), and the second part (20) guiding the air flow, wherein the second part (20), guiding the air flow, is connected to the first part (10), guiding the air flow, the second ventilation channel is located in the second part (20), guiding the air flow, and communicates with the first ventilation duct, wherein the upper plate (11) has an arcuate structure, the second part (20) directing the air flow has an arcuate structure, and the convex extension of the second part (20) directing the air flow and the convex extension of the upper plate (11) face the same direction. 2. Ventilation duct system according to claim 1, characterized in that the second part (20), directing the air flow, includes: the first arcuate plate (21), wherein one end of the first arcuate plate (21) is connected to the top plate (11), and the second arcuate plate (22), wherein one end of the second arcuate plate (22) is connected to the first bottom plate (12), the second arcuate plate (22) and the first arcuate plate (21) have a gap between them, and the second ventilation channel is formed between the second arcuate plate (22) and the first arcuate plate (21). 3. Ventilation duct system according to claim. 2, characterized in that the first arcuate plate (21) and the top plate (11) have a combined design, and the second arcuate plate (22) includes: the first connecting piece (22a) connected to the first bottom plate (12), an arcuate segment (22b), wherein one end of the arcuate segment (22b) is connected to the first connecting segment (22a), and a second connecting segment (22c) connected to the other end of the arcuate segment (22b). 4. The ventilation duct system according to claim 1, also including: a first seat (30), wherein the top plate (11) and the first bottom plate (12) are connected via the first seat (30). 5. Ventilation duct system according to claim 4, characterized in that the first mounting location (30) includes: the first pleated plate (31) connected to the top plate (11), a second pleated plate (32) connected to the first bottom plate (12), and a third folded plate (33) connected to the first folded plate (31) and the second folded plate (32), wherein the third folded plate (33) is located between the upper plate (11) and the first lower plate (12), and moreover, at least one ventilation hole (33a) is made in the third pleated plate (33). 6. Ventilation duct system according to claim 5, characterized in that a plurality of ventilation holes (33a) is used, and this plurality of ventilation holes (33a) is located in the third folded plate (33) at intervals in the direction of the length of the third folded plate (33) . 7. Ventilation duct system according to claim 1, also including: the second seat (40) connected at one end away from the first airflow guide part (10), the second airflow guide part (20), and the second seat (40) are configured to fix the second airflow guide part (20 ) directing the air flow. 8. The ventilation duct system according to claim 1, also including: a third part (60) directing the air flow, wherein one end of the third part (60) directing the air flow is connected to the end part of the first bottom plate (12), the other end of the third part (60) directing the air flow is connected to the air conditioning unit air, the air inlet channel is located in the third part (60), directing the air flow, and communicates with the first ventilation channel. 9. Ventilation duct system according to claim 8, characterized in that the third part (60), directing the air flow, includes: an inclined plate (61) connected to the first bottom plate (12), wherein the included angle is formed between the inclined plate (61) and the first bottom plate (12), and a side plate (62) connected to the inclined plate (61), wherein an air inlet channel is formed between the inclined plate (61), the side plate (62), and the top plate (11). 10. The ventilation duct system according to claim 8, also including: a support part (70) located below the third part (60) directing the air flow, and the support part (70) is designed to support the third part (60) directing the air flow. 11. Ventilation duct system according to claim 10, characterized in that the support part (70) is a support rod, the length of the support rod can be adjusted, and the end part of the support rod is connected to the second part (20) directing the air flow. 12. System of ventilation ducts, including: the first part (10) directing the air flow, including the top plate (11) and the first bottom plate (12), the first bottom plate (12) being located below the top plate (11), the first bottom plate (12) and the top plate (11 ) have a gap between them, and the first ventilation channel is located between the first bottom plate (12) and the top plate (11), and the second part (20) guiding the air flow, wherein the second part (20) guiding the air flow is connected to the first part (10) guiding the air flow, the second ventilation channel is located in the second part (20) guiding the air flow, and communicates with the first ventilation duct, the first seat (30), wherein the top plate (11) and the first bottom plate (12) are connected by means of the first seat (30), characterized in that the first mounting location (30) includes: the first pleated plate (31) connected to the top plate (11), a second pleated plate (32) connected to the first bottom plate (12), and a third folded plate (33) connected to the first folded plate (31) and the second folded plate (32), wherein the third folded plate (33) is located between the upper plate (11) and the first lower plate (12), and moreover, at least one ventilation hole (33a) is made in the third pleated plate (33).

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