Internal circulation air duct and tractor

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an internal circulation air duct and a tractor. The internal circulation air duct is used for a tractor cab, and comprises an evaporator assembly, an air inlet and an air outlet, the air return duct is communicated with one end of the evaporator assembly; the air outlet duct communicates with the other end of the evaporator assembly and is used for blowing the cooled or heated air to the instrument panel air duct; and the instrument table air channel is communicated with the air outlet air channel and is provided with a front air outlet for blowing air to the driving position, a lower air outlet for blowing air to the position below the feet of a driver, a defrosting air opening for blowing air to front glass and a side air opening for blowing air to side glass. The embodiment of the utility model has the beneficial effects that the evaporator component is arranged below the seat of the cab, and each air outlet is used for discharging air from the lower part, so that the direct blowing to the head of a driver is avoided, and the comfort of the driver is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to an internal circulation air duct and a tractor. Background Technology

[0002] The air conditioning systems in the cabs of existing tractor machines in the industry are mostly top-mounted direct-blowing vents, which blow the air directly onto the driver's head, resulting in poor driving comfort. The return air filter is located at the top of the cab, making maintenance inconvenient and causing poor air circulation within the cab. Utility Model Content

[0003] The purpose of this invention is to provide an internal circulation air duct and tractor that can avoid direct airflow onto the driver's head, thereby improving driving comfort.

[0004] In a first aspect, this utility model provides an internal circulation air duct for use in a tractor cab, comprising:

[0005] Evaporator assembly, installed under the driver's seat, is used for cooling or heating;

[0006] A return air duct connects to one end of the evaporator assembly;

[0007] An air outlet duct, connected to the other end of the evaporator assembly, is used to blow cooled or heated air toward the instrument panel duct.

[0008] The dashboard air duct, connected to the air outlet duct, is equipped with a front air outlet blowing towards the driver's seat, a lower air outlet blowing towards the driver's feet, a defrost air outlet blowing towards the windshield, and a side air outlet blowing towards the side windows.

[0009] In an optional implementation, the number of instrument panel air ducts is at least two.

[0010] In an optional implementation, the air outlet duct includes multiple duct modules that are spliced ​​together.

[0011] In an optional implementation, the duct modules are sealed together.

[0012] In an optional implementation, the air duct module includes a first air duct connecting to the evaporator assembly, a second air duct connecting to the first air duct, and a third air duct connecting to the second air duct.

[0013] The second air duct is Y-shaped, and there are two third air ducts.

[0014] In an optional implementation, the duct module is provided with a partition.

[0015] In an optional implementation, the number of partitions is multiple.

[0016] In an optional embodiment, each of the front air outlet, the lower air outlet, the defrost air outlet, and the side air outlet is provided with an independent switch.

[0017] In an optional embodiment, the end of the return air duct away from the evaporator assembly has a return air filter.

[0018] Secondly, this utility model provides a tractor that includes the internal circulation air duct described in any of the foregoing embodiments.

[0019] The beneficial effects of this utility model embodiment are:

[0020] By placing the evaporator assembly under the driver's seat and directing the airflow from below, the driver's head is not directly exposed to the evaporator, thus improving driver comfort. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of the internal circulation air duct provided for an embodiment of this utility model;

[0023] Figure 2 A front view of the internal circulation air duct provided in an embodiment of this utility model;

[0024] Figure 3 A schematic diagram (three-dimensional view) of the partition position of the internal circulation air duct provided for an embodiment of this utility model;

[0025] Figure 4 A schematic diagram (front view) of the partition position of the internal circulation air duct provided for an embodiment of this utility model.

[0026] Icons: 1-Return air duct; 2-Evaporator assembly; 3-First air duct; 4-Second air duct; 5-Third air duct; 6-Dashboard air duct; 7-Front air outlet; 8-Lower air outlet; 9-Defrost air outlet; 10-Side air outlet; 11-Return air filter; 12-Block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The following is combined Figures 1-4 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] Firstly, this utility model provides an internal circulation air duct for use in a tractor cab, such as... Figure 1 and Figure 2 As shown, it includes: an evaporator assembly 2, installed under the driver's seat, used for cooling or heating; a return air duct 1, connected to one end of the evaporator assembly 2; an outlet air duct, connected to the other end of the evaporator assembly 2, used to blow cooled or heated air towards the dashboard air duct 6; the dashboard air duct 6, connected to the outlet air duct, is provided with a front air vent 7 blowing towards the driver's seat, a lower air vent 8 blowing towards the driver's feet, a defrost air vent 9 blowing towards the windshield, and a side air vent 10 blowing towards the side windows.

[0035] In this embodiment, the evaporator assembly 2 is the core component of the entire air duct system and is installed below the driver's seat. This location not only makes full use of the space inside the driver's cab but also facilitates the cooling or heating functions of the air conditioning system. The evaporator assembly 2 cools or heats the air flowing through it through internal refrigerant circulation, providing a comfortable temperature environment for the driver's cab.

[0036] In this embodiment, one end of the return air duct 1 is connected to the evaporator assembly 2, and its main function is to guide the air in the driver's cabin back to the evaporator assembly 2 for further processing. Through the return air duct 1, the air in the driver's cabin can be recycled, improving the energy efficiency of the air conditioning system, and also helping to maintain the air quality in the driver's cabin.

[0037] In this embodiment, the air outlet duct connects to the other end of the evaporator assembly 2, and its function is to deliver the air cooled or heated by the evaporator assembly 2 to various air outlets in the driver's cab. The design of the air outlet duct fully considers the smoothness and uniformity of airflow, ensuring that the treated air can efficiently reach all areas of the driver's cab.

[0038] In this embodiment, the instrument panel air duct 6 is an extension of the air outlet duct, and its design is cleverly integrated with the instrument panel structure of the cab. The instrument panel air duct 6 is equipped with multiple air outlets, each targeting different areas within the cab:

[0039] Front air vent 7: blows air towards the driver's seat, providing direct cooling or heating to ensure the driver can enjoy a comfortable temperature environment while driving.

[0040] Lower air vent 8: blows air towards the driver's feet, solving the problem of "warm head and cold feet" in traditional air conditioning systems and improving driving comfort.

[0041] Defrosting Vent 9: Blows hot air onto the windshield, quickly removing frost and fog by blowing hot air onto the glass surface, ensuring clear visibility for the driver and improving driving safety.

[0042] Side air vent 10: Blows air towards the side glass, also serving to defrost and defog, ensuring the clarity of the side window glass and further improving driving safety.

[0043] Through the coordinated operation of the above components, the internal circulation air duct of this invention can effectively circulate and regulate the temperature of the air inside the cab, providing a more comfortable and safer driving environment for the tractor driver. This design not only improves the performance of the air conditioning system but also optimizes the space utilization inside the cab, demonstrating high practicality and innovation.

[0044] In an optional implementation, the number of instrument panel air ducts 6 is at least two.

[0045] In this embodiment, the number of instrument panel air ducts 6 is set to two, located on the left and right sides of the cab respectively. This design can further optimize the air distribution in the cab, ensuring that air can evenly cover all areas of the cab.

[0046] Specifically, airflow is provided on both the left and right sides of the cab, which can provide airflow to both the driver and the passenger. Furthermore, the side air vents 10 on the two instrument panel air ducts 6 blow air onto the side windows on the left and right sides respectively, ensuring that no glass in the cab is covered with frost or fog, thus improving driving safety.

[0047] In an optional implementation, the air outlet duct includes multiple duct modules that are spliced ​​together.

[0048] In this embodiment, the air outlet duct adopts a modular design, which is composed of multiple duct modules spliced ​​together.

[0049] Specifically, in this embodiment, each air duct module is an independent unit with standardized dimensions and shape. The modules are made of plastic, which is lightweight, has good formability, and a certain degree of mechanical strength.

[0050] The module's surface has splicing interfaces for connecting with other modules. These interfaces can be snap-fit, plug-in, or other suitable connection methods to ensure a secure and reliable connection between modules.

[0051] In this embodiment, the air duct module is designed in a modular fashion, making the assembly of the air duct more convenient and faster. Maintenance personnel can quickly replace damaged modules as needed without replacing the entire air duct; at the same time, it facilitates the maintenance and cleaning of the air duct, as each module can be disassembled individually for easy cleaning of dust and debris inside the air duct; the modular design can be adjusted according to the specific space and needs of the cab, such as by increasing or decreasing the number of modules to change the length or shape of the air duct to adapt to different cab layouts.

[0052] In an optional implementation, the duct modules are sealed together.

[0053] In this embodiment, a sealing structure is provided at the splicing interface between modules to ensure the airtightness of the air duct. The sealing structure can be a sealing gasket, sealing strip, or other sealing material to ensure that air does not leak when flowing within the air duct.

[0054] Specifically, in this embodiment, a sealing gasket or sealing strip is installed at the splicing interface. When the modules are spliced, the sealing gasket or sealing strip is compressed to form a sealing layer to prevent air leakage.

[0055] It is understandable that sealing can also be achieved through other methods, such as labyrinth seals, as long as the sealing between the air duct modules can be achieved.

[0056] In an optional embodiment, the air duct module includes a first air duct 3 connecting the evaporator assembly 2, a second air duct 4 connecting the first air duct 3, and a third air duct 5 connecting the second air duct 4; the second air duct 4 is Y-shaped, and there are two third air ducts 5.

[0057] In this embodiment, the first air duct 3 is directly connected to the evaporator assembly 2 and is responsible for introducing the air processed by the evaporator assembly 2 into the exhaust air duct system. The design of the first air duct 3 ensures that air can flow smoothly from the evaporator assembly 2 to the subsequent air duct modules.

[0058] In this embodiment, the second air duct 4 has a Y-shaped structure, with one end connected to the first air duct 3 and the other two ends connected to the two third air ducts 5 respectively. The Y-shaped design allows air to be split at the second air duct 4, enabling air to be delivered in two directions simultaneously, further optimizing air distribution. The Y-shaped second air duct 4 is equipped with a guide plate to ensure that the air can be evenly distributed to the two third air ducts 5 during the splitting process, avoiding turbulence or resistance at the splitting point.

[0059] In this embodiment, there are two third air ducts 5, which are respectively connected to two branches of the second air duct 4. Each third air duct 5 is connected to a dashboard air duct 6, which is responsible for delivering air to different areas of the driver's seat or the passenger seat.

[0060] In an optional embodiment, a partition 12 is provided within the air duct module.

[0061] In this embodiment, the partition 12 is installed inside the air duct module and is usually a plate-shaped structure that divides the air duct into multiple independent airflow channels.

[0062] Specifically, in this embodiment, the partition 12 divides the air duct into multiple independent airflow channels. Each channel can independently adjust the airflow to ensure that the air can be evenly distributed to each air outlet in the cab. The partition 12 can prevent the airflow from different areas from mixing and ensure that the airflow characteristics of each area remain stable, such as temperature, humidity, and wind speed. The presence of the partition 12 can enhance the structural strength of the air duct module and prevent the air duct from deforming under the impact of airflow, thereby improving the service life and reliability of the air duct.

[0063] As can be seen from the above embodiments, by setting partitions 12 within the duct module, the internal circulation duct of this invention can further optimize airflow distribution and air volume regulation. This design not only improves the flexibility and maintenance convenience of the duct system, but also ensures the airtightness of the duct and the overall performance of the air conditioning system. Through the synergistic effect of multiple partitions 12, the duct can achieve a more uniform airflow distribution, improving the air conditioning comfort and air circulation efficiency in the driver's cab.

[0064] In a preferred embodiment, there are multiple partitions 12.

[0065] Multiple partitions 12 are set in different locations, such as Figure 3 and Figure 4 As shown, their shapes and positions are all different.

[0066] In an optional embodiment, each of the front air outlet 7, the lower air outlet 8, the defrost air outlet 9, and the side air outlet 10 is provided with an independent switch.

[0067] In this embodiment, each air outlet is equipped with an independent switch, which can be controlled independently to achieve the effect of opening one or a few outlets while closing the rest. This improves the comfort of the cab and saves energy.

[0068] In this embodiment, there are many ways to set the switch, such as rotary switch, button switch or touch switch, and the specific type is selected according to the design style of the cab and the ease of operation.

[0069] Rotary switches offer stepless airflow adjustment, allowing the operator to adjust the airflow by rotating the knob; push-button switches offer multiple airflow settings, such as low, medium, and high; touch switches are more modern, allowing control of airflow and on / off status via touchscreen or virtual buttons on the panel.

[0070] In this embodiment, the independent switch is installed in an easily accessible location within the driver's cab, such as on the dashboard or the side of the cab. The switch's location must consider the driver's ease of operation, ensuring that the driver can easily adjust the airflow and on / off status of each air vent while driving.

[0071] In an optional embodiment, the end of the return air duct 1 away from the evaporator assembly 2 has a return air filter element 11.

[0072] In this embodiment, the return air filter 11 is installed at the end of the return air duct 1, near the air inlet of the internal circulation system in the cab. This location ensures that the return air is effectively filtered before entering the evaporator assembly 2, reducing dust and impurities from contaminating the evaporator assembly 2.

[0073] In this embodiment, the return air filter 11 employs multi-layered filter materials, effectively filtering dust, pollen, fine particulate matter, and odors from the air. Specifically, the filter materials may include high-efficiency filter paper, activated carbon layers, etc., to meet different filtration needs. Specifically, the outer shell of the return air filter 11 is made of plastic, which is lightweight and has good formability. The outer shell is designed with a sealing structure to ensure that air does not leak when passing through the filter element.

[0074] In this embodiment, the return air filter 11 can effectively filter dust and fine particulate matter in the air, reducing the entry of these impurities into the evaporator assembly 2 and extending the service life of the evaporator assembly 2; the activated carbon layer in the return air filter 11 can adsorb odors in the air, improving the air quality in the cab; by filtering impurities in the return air, the return air filter 11 can ensure that the air entering the evaporator assembly 2 is clean, improving the cooling and heating efficiency of the air conditioning system; the return air filter 11 is replaceable, which is convenient for regular maintenance and replacement. The replacement cycle of the filter can be adjusted according to the usage environment and air quality in the cab. It is generally recommended to replace it every 3-6 months. The replacement operation is simple. Maintenance personnel can easily replace the filter by opening the maintenance cover of the return air duct 1 without disassembling the entire duct system.

[0075] Secondly, this utility model provides a tractor that includes the internal circulation air duct described in any of the foregoing embodiments.

[0076] The beneficial effects of this utility model embodiment are:

[0077] By placing the evaporator assembly 2 under the driver's seat and directing the airflow from below, the driver's head is not directly exposed to the evaporator assembly, thus improving the driver's comfort.

[0078] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An internal circulation air duct for a tractor cab, characterized in that, include: Evaporator assembly, installed under the driver's seat, is used for cooling or heating; A return air duct connects to one end of the evaporator assembly; An air outlet duct, connected to the other end of the evaporator assembly, is used to blow cooled or heated air toward the instrument panel duct. The dashboard air duct, connected to the air outlet duct, is equipped with a front air outlet blowing towards the driver's seat, a lower air outlet blowing towards the driver's feet, a defrost air outlet blowing towards the windshield, and a side air outlet blowing towards the side windows.

2. The inner-loop air duct according to claim 1, characterized in that The instrument panel has at least two air ducts.

3. The internal loop air duct of claim 1, wherein, The air outlet duct comprises multiple duct modules that are spliced ​​together.

4. The inner-loop air duct according to claim 3, wherein The air duct modules are sealed together.

5. The internal loop air duct of claim 3, wherein, The air duct module includes a first air duct connecting to the evaporator assembly, a second air duct connecting to the first air duct, and a third air duct connecting to the second air duct; The second air duct is Y-shaped, and there are two third air ducts.

6. The inner-loop air duct according to claim 3, wherein The air duct module is equipped with partitions.

7. The internal loop air duct of claim 6, wherein, The number of partitions is multiple.

8. The internal loop air duct of claim 1, wherein, Each of the front air outlet, the lower air outlet, the defrost air outlet, and the side air outlet is equipped with an independent switch.

9. The internal loop air duct of claim 1, wherein, The return air duct has a return air filter at the end away from the evaporator assembly.

10. A tractor characterised in that, Includes the internal circulation air duct as described in any one of claims 1-9.

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