Tractor cab air conditioner air outlet arrangement structure, cab and tractor

Abstract

The invention relates to the technical field of vehicle cab ventilation, and discloses a tractor cab air conditioner air outlet arrangement structure which comprises a cab framework and a ceiling, and an air conditioner is arranged in the ceiling. Air inlets are formed in the left side and the right side, outside the cab framework, of the ceiling and communicated with an air conditioner air inlet; a plurality of air duct outlets distributed along the inner side edge are formed in the periphery of the rear ceiling at intervals, the rear ceiling is provided with a strip-shaped air outlet, the front left stand column and the front right stand column are provided with stand column air supplement shells, and the air outlets are all communicated with an air conditioner air outlet. Dust entering is reduced through the outer side air inlet, a cab is fully covered with the multiple air openings, air supply blind areas and direct blowing are avoided, and the temperature difference is reduced; and multiple air ports supply air cooperatively, so that the indoor air pressure is higher than that outside the vehicle, dust can be prevented from entering from gaps, the environment quality is improved, and the requirement for long-time operation comfort is met.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle cab ventilation, in particular to an air outlet arrangement structure for an air conditioner in a tractor cab. Background Art

[0002] In agricultural production operations, tractors, as important power machinery, often need to operate for long periods of time in dusty fields and roadside environments. Therefore, the comfort of the cab is crucial to the operator's work efficiency and physical health. The air-conditioning system is a key component to ensure the comfort of the cab. The rationality of the air outlet layout directly affects the cooling and heating effects and air supply uniformity of the air conditioner. At present, there are many problems with the arrangement of air outlets of tractor cab air conditioners. Among them, the location of the air inlet of the air conditioner in the existing technology is not reasonable enough, and there is a lack of effective dust-proof structure design. As a result, when the tractor is operating in a dusty environment, external dust can easily enter the cab with the airflow, which not only pollutes the air environment in the cab, but also adheres to components such as the instrument panel and seats, affecting the service life of the equipment and the safety of operation. At the same time, the layout of existing air-conditioning vents is often relatively concentrated or in a single position, which is prone to air supply blind spots or direct blowing. Some air outlets only supply air to the front area of ​​the cab, causing the rear area to become an air supply blind spot and unable to obtain effective temperature regulation; and the air supply direction of some air outlets is too concentrated, blowing directly to the operator or specific parts of the cab, causing local overcooling or overheating. This unreasonable air supply method makes the temperature difference between the front, back, left and right areas of the cab obvious, and it is impossible to form a uniform temperature field, which makes it difficult to meet the comfort needs of operators working for a long time. Summary of the Invention

[0003] The purpose of the present invention is to provide a tractor cab air conditioning outlet arrangement structure that can reduce dust entry, achieve uniform air supply and eliminate blind spots and direct blowing phenomena in order to solve the above problems.

[0004] To achieve the above-mentioned purpose, the present invention discloses an air outlet arrangement structure for an air conditioner in a tractor cab, comprising a cab frame and a ceiling, an air conditioner being arranged in the ceiling, and the structural feature of the structure is that air inlets are arranged on the left and right sides of the main body of the ceiling outside the cab frame, the ceiling is provided with a front windshield blowing port located in the cab frame, a plurality of air duct outlets are respectively arranged at intervals on the periphery of the ceiling on the rear side of the front windshield blowing port, the plurality of air duct outlets are arranged at intervals along the side edge of the ceiling in the cab frame, a strip air outlet is arranged on the ceiling near the rear side of the cab frame, a column air supply shell is arranged on the left and right columns on the front side of the cab frame, the air inlet is connected with the air inlet of the air conditioner, the front windshield blowing port, the plurality of air duct outlets, the strip air outlet and the column air supply shell are connected with the air outlet of the air conditioner.

[0005] After adopting the above structure, the probability of external dust directly entering can be reduced by arranging air intakes on the left and right sides of the ceiling outside the cab frame; at the same time, the multi-position distribution of the front windshield blowing vents, multiple air duct outlets, strip air outlets and column air supply shells can fully cover the front, rear, left and right areas of the cab, effectively avoiding air supply blind spots and direct blowing phenomena, and reducing the temperature difference between different areas. The coordinated air supply of multiple air vents can continuously deliver airflow into the cab, ensuring that the air pressure in the cab is greater than the outdoor air pressure, so that dust from the harsh external environment cannot enter through the gaps in the cab, further improving the environmental quality in the cab and meeting the comfort needs of long-term operations.

[0006] Preferably, the air inlets are strip-shaped openings located on the bottom wall of the ceiling, with the left and right air inlets located near the front pillars of the cab frame. By configuring the air inlets as strip-shaped openings and placing them on the lower end of the ceiling near the front pillars, the air intake area is increased while the pillars partially shield dust, further reducing dust ingress. The sufficient air intake provides a stable air source for the air conditioner, and combined with the positive indoor pressure created by the multiple air outlets, dust can be effectively prevented from entering through gaps, maintaining a clean interior.

[0007] Preferably, the front windshield vents include two first vents spaced apart along the left-right direction of the ceiling. The first vents are strip-shaped openings disposed along the left-right direction of the ceiling and are located within the cab frame, near the left and right front pillars. The two first vents, disposed along the left-right direction of the ceiling and near the left and right front pillars, provide targeted airflow to the front windshield, quickly regulating the temperature of the front windshield to prevent temperature anomalies, and further providing demisting services.

[0008] Preferably, the multiple air duct outlets include two second air outlets, two third air outlets, and two fourth air outlets. The two second air outlets are respectively arranged at the front end of the left and right sides of the ceiling, the two third air outlets are respectively arranged at the middle of the left and right sides of the ceiling, and the two fourth air outlets are respectively arranged at the rear end of the left and right sides of the ceiling. By arranging the two second, third, and fourth air outlets at the front, middle, and rear ends of the left and right sides of the ceiling, respectively, comprehensive air supply coverage from front to back is achieved on both sides of the cab, eliminating air supply blind spots on both sides and achieving more balanced temperature on both sides. The continuous and uniform air supply on both sides not only regulates the temperature, but also works together with other air outlets to maintain positive pressure in the cab, preventing dust from intruding through side gaps, and improving indoor environmental stability.

[0009] Preferably, the strip air outlet is positioned along the left-right direction of the ceiling between the two air duct outlets at the rear end of the ceiling. This positioning of the strip air outlet between the two air duct outlets at the rear end of the ceiling allows for precise air delivery to the rear area of ​​the cab, addressing the existing blind spot at the rear end and ensuring a more consistent temperature across the front and rear areas of the cab.

[0010] Preferably, the column air supply housing includes a side duct housing mounted on the front column of the cab frame, an air guide chamber disposed on the upper portion of the side duct housing, and air guide ports disposed on the outer sidewalls of the air guide chamber. The design of the side duct housing, air guide chamber, and air guide ports of the column air supply housing directs airflow to the areas near the left and right front columns of the cab, replenishing the air volume in these areas and avoiding localized temperature imbalances at the front. Furthermore, the positioning of the air guide ports reduces direct airflow to the operator. The supplementary air supply near the columns further improves the airflow distribution within the cab and increases the air pressure in the front area.

[0011] Preferably, the side duct housing includes a trumpet-shaped header housing that is wide at the top and narrow at the bottom, and a connector housing connected to the lower portion of the header housing and to the cab frame pillar. The trumpet-shaped header housing, which is wide at the top and narrow at the bottom, facilitates airflow concentration. The connector housing is securely connected to the cab frame pillar, ensuring stable installation of the column air supply housing and continuous and stable air supply.

[0012] Preferably, the air guide chamber is composed of an air guide shell provided on the connecting portion shell and a closed partition provided in the side air duct shell, the air guide shell is provided at the upper position of the connecting portion shell, the internal space of the air guide shell is connected with the internal space of the collecting portion shell and the connecting portion shell, the air guide port is provided on the outer side wall of the air guide shell, the closed partition is closed at the upper and rear parts of the collecting portion shell, and extends downward along the connecting portion shell, and is then closed at the rear and lower parts of the air guide shell, the air guide shell and the side air duct shell cooperate with the closed partition to form a closed chamber, and an air guide duct connected to the air guide chamber is provided at the upper end of the closed partition. The air guide shell is connected with the collecting portion and the internal space of the connecting portion shell, and a complete closed chamber is formed in combination with the closed partition, thereby reducing air leakage and ensuring effective use of air volume; the air guide duct is connected with the air guide chamber, further optimizing air flow guidance and reducing the generation of vortex, making the air supply from the air guide port more accurate and comfortable, and enhancing the temperature regulation effect of the local area.

[0013] A cab, a cab comprising the above-mentioned tractor cab air conditioning outlet arrangement structure, effectively improves the driving environment.

[0014] A tractor includes the above-mentioned cab, which has the advantages of the above-mentioned cab and improves the riding comfort of the driver.

[0015] To sum up, the beneficial effects of the present invention are: the present invention can reduce the entry of dust, achieve uniform air supply to eliminate blind spots and direct blowing phenomena, and by arranging air inlets on the left and right sides of the ceiling outside the cab frame, the probability of external dust directly entering can be reduced; at the same time, the multi-position distribution of the front windshield blowing outlet, multiple air duct outlets, strip air outlets and column air supply shells can fully cover the front, rear, left and right areas of the cab, effectively avoid air supply blind spots and direct blowing phenomena, and reduce the temperature difference between different areas. The coordinated air supply of multiple air outlets can continuously deliver airflow into the cab, ensuring that the air pressure in the cab is greater than the outdoor air pressure, so that dust from the harsh external environment cannot enter from the gaps in the cab, further improving the environmental quality in the cab and meeting the comfort requirements of long-term operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 A schematic diagram of the structure of the distribution arrangement of the air duct outlets on the ceiling of the present invention; Figure 3 This is a structural schematic diagram of the installation position of the air outlet on the ceiling of the present invention; Figure 4 This is a schematic diagram of the structure in which the enclosed partition of the present invention is installed in the side air duct housing; Figure 5 It is a structural schematic diagram of the column air supply housing of the present invention.

[0017] In the figure: 1. Cab frame; 2. Ceiling; 3. Air conditioner; 4. Air inlet; 5. Front windshield air outlet; 6. Air duct outlet; 7. Strip air outlet; 8. Pillar; 9. Pillar air supply housing; 10. First air outlet; 11. Second air outlet; 12. Third air outlet; 13. Fourth air outlet; 14. Side air duct housing; 15. Air guide port; 16. Collecting part housing; 17. Connecting part housing; 18. Air guide housing; 19. Enclosed partition; 20. Air guide duct. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0020] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0021] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0022] like Figure 1 - Figure 3 As shown, the present invention includes a cab frame 1 and a roof 2, an air conditioner 3 is provided in the roof 2, and air inlets 4 are provided on the left and right sides of the roof 2 outside the cab frame 1. When designed, the air inlets 4 are strip-shaped openings and are provided on the bottom wall of the roof 2. The air inlets 4 on the left and right sides of the roof 2 are provided near the front columns 8 of the cab frame 1. Usually, the roof 2 includes an upper shell and a lower shell. The lower shell of the roof 2 is installed at the upper end of the cab frame 1 and the length and width of the lower shell are greater than the length and width of the upper part of the cab frame 1. The upper shell of the roof 2 The body is installed on the lower shell and an internal chamber is formed between the two, and the above-mentioned air conditioner 3 is installed in the internal chamber; and by setting the air inlet 4 as a strip opening and placing it at the lower end surface of the ceiling 2 close to the front column 8, the air intake area is increased, and the column 8 is used to block part of the dust, further reducing the entry of dust. The sufficient air intake volume provides a stable air source for the air conditioner 3, and the indoor positive pressure formed by the multi-air outlet air supply can effectively prevent dust from invading from the gaps, thereby maintaining the cleanliness of the cab. Usually, the air conditioner 3 is installed in the ceiling 2 and in the upper ceiling 2 near the rear of the cab.

[0023] like Figure 1 and Figure 2 As shown, a front windshield blowing port 5 is provided on the ceiling 2, which is located inside the cab frame 1 and close to the front windshield. During design, the front windshield blowing port 5 includes two first blowing ports 10 spaced apart along the left and right directions of the ceiling 2. The first blowing port 10 is a strip opening arranged along the left and right directions of the ceiling 2, and the two first blowing ports 10 are respectively arranged at positions close to the left and right front pillars 8 in the cab frame 1. In this way, through the two first blowing ports 10 arranged along the left and right directions of the ceiling 2 and close to the left and right front pillars 8, air can be supplied to the front windshield in a targeted manner, and the temperature of the front windshield area can be quickly adjusted to avoid abnormal temperature in the front area. At the same time, the front windshield can also be further defogged.

[0024] like Figure 1 and Figure 2As shown, a plurality of air duct outlets 6 are spaced apart on the periphery of the roof 2 behind the front windshield outlet 5, wherein the plurality of air duct outlets 6 are spaced apart along the side edge of the roof 2 inside the cab frame 1, and a strip-shaped air outlet 7 is provided on the roof 2 near the rear side inside the cab frame 1. During the design, a rectangular groove is provided on the bottom wall of the roof 2 inside the cab frame 1, and each side of the rectangular groove is close to the connecting crossbeam position of the upper part of the cab frame 1, and the depth of the rectangular groove close to the rear of the cab frame 1 is The depth of the trough body is smaller than the front part, and the bottom of the trough body is usually set into a smoothly transitioned arc structure, and the above-mentioned front windshield blowing port 5 is set on the ceiling 2 on the front side of the rectangular trough body; wherein, the above-mentioned multiple air duct outlets 6 include two second blowing ports 11, two third blowing ports 12 and two fourth blowing ports 13, wherein, the two second blowing ports 11 are respectively set at the front end corners of the left and right sides of the rectangular trough body on the ceiling 2, and the two third blowing ports 12 are respectively set at the middle position of the left and right sides of the rectangular trough body on the ceiling 2 The above-mentioned two fourth air outlets 13 are respectively arranged at the rear end of the rectangular trough near the left and right side edges, so that the two second air outlets 11 and the third air outlet 12 are arranged on the side walls of the trough, and the fourth air outlet 13 is arranged on the bottom wall of the shallower position of the rectangular trough, so that each air outlet can blow to the front, back, left and right of the driver's seat, thereby achieving comprehensive air supply coverage from front to back on both sides of the cab, eliminating the air supply blind spots on both sides, making the temperature on both sides more balanced, and the continuous and uniform air supply on both sides not only regulates the temperature, but also can work with other air outlets to maintain the positive pressure in the cab, prevent dust from entering from the side gaps, and improve the stability of the indoor environment. Usually, the air duct outlet 6 is generally a circular opening structure; during production, the strip air outlet 7 is arranged along the left and right directions of the ceiling 2 at a position between the two air duct outlets 6 at the rear end of the ceiling 2. Since the strip air outlet 7 is located between the two air duct outlets 6 at the rear end of the ceiling 2, air can be accurately supplied to the rear area of ​​the cab, which makes up for the defect that the rear side is prone to blind spots in the existing technology, and makes the temperature of the front and rear areas of the cab more consistent.

[0025] like Figure 1 - Figure 5As shown, column air supply shells 9 are provided on the left and right columns 8 on the front side of the cab frame 1. The column air supply shell 9 includes a side air duct shell 14 provided on the front column 8 of the cab frame 1. The upper part of the side air duct shell 14 is provided with an air guide chamber, and an air guide port 15 is provided on the outer wall of the air guide chamber. In this way, the side air duct shell 14 and the air guide chamber and the air guide port 15 of the column air supply shell 9 can guide the airflow to the area near the left and right columns 8 on the front side of the cab, supplement the air volume in this area, avoid local temperature imbalance on the front side, and the position setting of the air guide port 15 can reduce the situation of direct blowing on the operator. During the design, the side air duct shell 14 includes a trumpet-shaped collecting part shell 16 that is wide at the top and narrow at the bottom, and also includes a connecting part shell 17 connected to the lower part of the collecting part shell 16 and connected to the upper column 8 of the cab frame 1. The trumpet-shaped collecting part shell 16 that is wide at the top and narrow at the bottom is conducive to concentrating the airflow. The body 17 is firmly connected to the column 8 on the cab frame 1, so that the column air supply shell 9 is installed stably, ensuring the continuity and stability of air supply; wherein, the air guide chamber is composed of an air guide shell 18 arranged on the connecting part shell 17 and a closed partition 19 arranged in the side air duct shell 14. The air guide shell 18 is arranged at the upper position of the connecting part shell 17, and the internal space of the air guide shell 18 is connected with the collecting part shell 16 and the internal space of the connecting part shell 17. The air guide port 15 is arranged on the outer side wall of the air guide shell 18. During manufacturing, the closed partition 19 is closed at the upper and rear part of the collecting part shell 16, and extends downward along the connecting part shell 17, and then is closed at the rear and lower part of the air guide shell 18. In this way, the air guide shell 18 and the side air duct shell 14 cooperate with the closed partition 19 to form a closed chamber. At the same time, an air guide duct 20 connected to the air guide chamber is also provided at the upper end of the closed partition 19. In this way, the air guide shell 18 is connected with the internal space of the collecting part and the connecting part shell 17, and combined with the closed partition 19 to form a complete closed chamber, which reduces air leakage and ensures effective use of the air volume; and the air guide duct 20 is connected with the air guide chamber, which further optimizes the air flow guidance and can reduce the generation of vortexes, so that the air supply of the air guide port 15 is more accurate and comfortable, and the temperature regulation effect of the local area is enhanced.

[0026] like Figure 4 and Figure 5As shown, the above-mentioned closed partition 19 includes an upper sealing plate that is closed at the opening of the collecting part shell 16, and a rear sealing plate that extends downward and has a width equal to the width of the connecting part shell 17 is provided on the rear end edge of the upper sealing plate. The lower part of the rear sealing plate is provided with an arc-shaped guide plate that bends forward and is connected to the bottom of the air guide shell 18. Side sealing plates that are connected to the upper sealing plate and fit on the inner wall of the collecting part shell 16 are provided on the left and right sides of the upper part of the rear sealing plate. When designed, the combined structure of the upper sealing plate, rear sealing plate, arc-shaped guide plate and side sealing plates of the closed partition 19 fits tightly with the inner walls of the collecting part shell 16 and the air guide shell 18, ensuring the smoothness of the air flow channel in the shell, which is conducive to the smooth downward transmission of the airflow entering from the top. The arc-shaped guide plate can guide the airflow to flow smoothly along the curved path to the air guide port 15 of the air guide shell 18, reducing the wind resistance, vortex and loss problems at the corners. The side sealing plates can prevent the airflow from diffusing from both sides. like Figure 1 - Figure 3 As shown, the air inlet 4 is connected to the air inlet of the air conditioner 3. The front windshield vent 5, multiple air duct outlets 6, strip air outlet 7, and column air supply housing 9 are connected to the air outlet of the air conditioner 3. Through the multi-position distribution of the front windshield vent 5, multiple air duct outlets 6, strip air outlet 7, and column air supply housing 9, the front, rear, left, and right areas of the cab can be fully covered, effectively avoiding air supply blind spots and direct blowing phenomena, and reducing the temperature difference between different areas. At the same time, the coordinated air supply of multiple air outlets can continuously deliver airflow to the cab, ensuring that the air pressure in the cab is greater than the outdoor air pressure, preventing dust from the harsh external environment from entering the cab through the gaps, further improving the environmental quality of the cab and meeting the comfort requirements of long-term operation.

[0027] A cab, comprising the above-mentioned tractor cab air-conditioning outlet arrangement structure, can effectively improve the driving environment. A tractor comprises the above-mentioned cab and has the advantages of the above-mentioned cab, thereby improving the riding comfort of the driver.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tractor cab air conditioning outlet arrangement structure, comprising a cab frame (1) and a roof (2), wherein an air conditioner (3) is arranged in the roof (2), and characterized in that: The roof (2) is provided with air inlets (4) on both left and right sides of the main body outside the cab frame (1), the roof (2) is provided with a front windshield blowing port (5) located inside the cab frame (1), and a plurality of air duct outlets (6) are spaced apart around the periphery of the roof (2) behind the front windshield blowing port (5), the plurality of air duct outlets (6) are spaced apart along the side edge of the roof (2) inside the cab frame (1), a strip air outlet (7) is provided on the roof (2) near the rear side inside the cab frame (1), and a column air supply shell (9) is provided on the left and right columns (8) on the front side inside the cab frame (1), the air inlet (4) is connected to the air inlet of the air conditioner (3), and the front windshield blowing port (5), the plurality of air duct outlets (6), the strip air outlet (7) and the column air supply shell (9) are connected to the air outlet of the air conditioner (3).

2. The tractor cab air conditioning outlet arrangement structure according to claim 1, characterized in that: The air inlet (4) is a strip-shaped opening and is arranged on the bottom wall of the roof (2). The air inlets (4) on the left and right sides of the roof (2) are arranged at positions close to the front columns (8) of the cab frame (1).

3. The tractor cab air conditioning outlet arrangement structure according to claim 1, characterized in that: The front windshield air outlet (5) comprises two first air outlets (10) spaced apart along the left and right directions of the ceiling (2), wherein the first air outlets (10) are strip-shaped openings arranged along the left and right directions of the ceiling (2), and the two first air outlets (10) are respectively arranged at positions close to the left and right front columns (8) in the cab frame (1).

4. The tractor cab air conditioning outlet arrangement structure according to claim 1, characterized in that: The multiple air duct outlets (6) include two second air outlets (11), two third air outlets (12) and two fourth air outlets (13), the two second air outlets (11) are respectively arranged at the front end positions of the left and right sides of the ceiling (2), the two third air outlets (12) are respectively arranged at the middle positions of the left and right sides of the ceiling (2), and the two fourth air outlets (13) are respectively arranged at the rear end positions of the left and right sides of the ceiling (2).

5. The tractor cab air conditioning outlet arrangement structure according to claim 1, characterized in that: The strip-shaped air outlet (7) is arranged along the left-right direction of the ceiling (2) at a position between the two air duct outlets (6) at the rear end of the ceiling (2).

6. The tractor cab air conditioning outlet arrangement structure according to claim 1, characterized in that: The column air supply housing (9) includes a side air duct housing (14) arranged on a front column (8) of the cab frame (1), an air guide chamber is arranged on the upper portion of the side air duct housing (14), and an air guide port (15) is arranged on the outer side wall of the air guide chamber.

7. The tractor cab air conditioning outlet arrangement structure according to claim 6, characterized in that: The side air duct housing (14) comprises a horn-shaped collecting portion housing (16) that is wide at the top and narrow at the bottom, and also comprises a connecting portion housing (17) connected to the lower portion of the collecting portion housing (16) and connected to the upper column (8) of the cab frame (1).

8. The tractor cab air conditioning outlet arrangement structure according to claim 7, characterized in that: The air guide chamber is composed of an air guide shell (18) arranged on the connecting shell (17) and a closed partition (19) arranged in the side air duct shell (14). The air guide shell (18) is arranged at the upper position of the connecting shell (17). The internal space of the air guide shell (18) is connected with the internal space of the collecting shell (16) and the connecting shell (17). The air guide port (15) is arranged on the outer wall of the air guide shell (18). The closed partition (19) is closed at the upper and rear parts of the collecting shell (16) and extends downward along the connecting shell (17), and is then closed at the rear and lower parts of the air guide shell (18). The air guide shell (18) and the side air duct shell (14) cooperate with the closed partition (19) to form a closed chamber. The upper end of the closed partition (19) is provided with an air guide pipe (20) connected with the air guide chamber.

9. A cab, characterized in that: The invention comprises a tractor cab air-conditioning outlet arrangement structure according to any one of claims 1 to 8, wherein the roof (2) comprises an upper shell and a lower shell, the lower shell of the roof (2) is mounted on the upper end of the cab frame 1, the length and width of the lower shell of the roof (2) are greater than the length and width of the upper part of the cab frame (1), the upper shell of the roof (2) is mounted on the lower shell and an internal cavity is formed therebetween, a rectangular trough is provided on the bottom wall of the roof (2) within the cab frame (1), and the depth of the rectangular trough near the rear of the cab frame (1) is less than the depth of the front.

10. A tractor, characterized in that: Comprising the cab as claimed in claim 9.

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