External circulation air conditioner air duct and tractor

Abstract

The utility model relates to the technical field of agricultural mechanical equipment, in particular to an external circulation air conditioner air duct and a tractor. The external circulation air conditioner air duct comprises an air inlet pipeline, a fresh air filter element, a fresh air duct, a fresh air cavity, an air blower and an internal circulation air duct. An air inlet of the air inlet pipeline is located at the top of the cab, the fresh air filter element is located at the bottom of the cab, and the air inlet pipeline communicates with the air inlet end of the fresh air filter element through a front stand column of the cab. The air outlet end of the fresh air filter element communicates with the air inlet end of the fresh air duct, and the air outlet end of the fresh air duct communicates with the fresh air cavity; the fresh air cavity communicates with the inner circulation air duct. The air blower is arranged in the fresh air cavity. External fresh air can be continuously introduced, impurities can be filtered, and the air quality in a cab is effectively improved; the positive pressure environment of the cab is maintained, external pollutants are prevented from entering, meanwhile, air is evenly supplied, local temperature difference is avoided, and overall comfort is improved; replacement and maintenance are convenient, the maintenance cost is reduced, and the stability and adaptability of the system are enhanced.

Description

Technical Field

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

[0002] In existing tractor cabs, air conditioning systems mostly use an internal recirculation design, which has several problems. For example, the cab has poor sealing, making it prone to fogging in rainy weather and affecting driving comfort; the fresh air volume in a positive pressure cab is insufficient, failing to effectively maintain a positive pressure environment; the fresh air filtration system lacks independent ducts and static settling function, making it prone to clogging and inconvenient to maintain. These problems seriously affect the air quality inside the cab and the driver's comfort. Utility Model Content

[0003] The purpose of this utility model is to provide an external circulation air conditioning duct and tractor for connecting the cab to the outside, which can effectively improve the air quality inside the cab, improve driving comfort, and reduce maintenance costs.

[0004] In the first aspect, this utility model provides an external circulation air conditioning duct for connecting the interior and exterior of the driver's cab, including an air intake pipe, a fresh air filter, a fresh air duct, a fresh air cavity, a blower, and an internal circulation duct;

[0005] The air inlet of the air inlet duct is located at the top of the cab, the fresh air filter is located at the bottom of the cab, and the air inlet duct is connected to the air inlet end of the fresh air filter through the front pillar of the cab.

[0006] The air outlet of the fresh air filter is connected to the air inlet of the fresh air duct, and the air outlet of the fresh air duct is connected to the fresh air chamber.

[0007] The fresh air cavity is connected to the internal circulation air duct;

[0008] The blower is installed inside the fresh air chamber and is used to blow fresh air from outside the cab into the internal circulation air duct.

[0009] In an optional implementation, the fresh air duct includes multiple duct modules;

[0010] Multiple air duct modules are spliced ​​together.

[0011] In an optional implementation, the duct module is spliced ​​in at least one of the following methods: snap-fit, transition fit, interference fit, or bolt connection.

[0012] In an optional implementation, the duct modules are sealed together.

[0013] In an optional embodiment, the air duct modules are sealed together with sealing cotton.

[0014] In an optional embodiment, the fresh air duct is provided with a concave structure.

[0015] In an optional embodiment, the fresh air duct is made of plastic.

[0016] In an optional implementation, a baffle plate is provided inside the fresh air duct.

[0017] In an optional embodiment, the air inlet of the air inlet duct is provided with a filter screen.

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

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

[0020] With independent air intake ducts and fresh air channels, fresh external air can be continuously introduced and impurities filtered, effectively improving the air quality in the cab. The blower is independently set in the fresh air chamber to maintain a positive pressure environment in the cab, preventing external pollutants from entering, while also delivering air evenly to avoid local temperature differences and improve overall comfort. The fresh air filter is located at the bottom of the cab for easy replacement and maintenance, reducing maintenance costs and enhancing the stability and adaptability of the system. 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 front view of the external circulation air conditioning duct provided in an embodiment of this utility model;

[0023] Figure 2 A three-dimensional structural diagram of the external circulation air conditioning duct provided for an embodiment of this utility model.

[0024] Icons: 1-Fresh air chamber; 2-Fresh air duct; 3-Fresh air filter; 4-Front pillar; 5-Air inlet; 6-Blower; 7-Internal circulation air duct; 8-Cabin roof. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The following is combined Figure 1 and Figure 2 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.

[0032] Firstly, this utility model provides an external circulation air conditioning duct for connecting the interior and exterior of the driver's cab, such as... Figure 1 and Figure 2 As shown, the system includes an air inlet duct, a fresh air filter 3, a fresh air duct 2, a fresh air chamber 1, a blower 6, and an internal circulation duct 7. The air inlet 5 of the air inlet duct is located at the top of the cab, and the fresh air filter 3 is located at the bottom of the cab. The air inlet duct is connected to the air inlet end of the fresh air filter 3 through the front pillar 4 of the cab. The air outlet end of the fresh air filter 3 is connected to the air inlet end of the fresh air duct 2, and the air outlet end of the fresh air duct 2 is connected to the fresh air chamber 1. The fresh air chamber 1 is connected to the internal circulation duct 7. The blower 6 is installed in the fresh air chamber 1 and is used to blow fresh air from outside the cab to the internal circulation duct 7.

[0033] In this embodiment, the air inlet 5 of the air intake duct is located at the top of the cab, specifically on the cab roof 8, facing outwards to effectively capture fresh air from outside the cab. The air intake duct is connected to the air intake end of the fresh air filter 3 via the front pillar 4 of the cab, ensuring that air can smoothly enter the air duct system.

[0034] In this embodiment, the fresh air filter 3 is installed at the bottom of the cab for easy maintenance and replacement. Its main function is to filter the fresh air entering the cab, removing dust, impurities, and other pollutants, thereby ensuring that the air entering the cab is clean.

[0035] In this embodiment, the fresh air duct 2 connects the air outlet of the fresh air filter 3 and the air inlet of the fresh air chamber 1. It provides a smooth passage for the filtered air, ensuring that the air can be efficiently delivered to the fresh air chamber 1.

[0036] In this embodiment, the fresh air chamber 1 is an important component of the air duct system, serving to buffer and distribute airflow. The air outlet of the fresh air chamber 1 is connected to the internal circulation air duct 7, ensuring that fresh air can be evenly distributed to all areas of the driver's cab.

[0037] In this embodiment, the blower 6 is independently installed in the fresh air chamber 1, and its main function is to provide power to the air duct system. Through the action of the blower 6, fresh air outside the driver's cab can be effectively drawn in and blown into the internal circulation air duct 7, thereby realizing the circulation of air inside and outside the driver's cab.

[0038] In this embodiment, the internal circulation air duct 7 is connected to the fresh air cavity 1, which is responsible for evenly distributing fresh air to all corners of the driver's cab. It can also work in conjunction with other air conditioning systems in the driver's cab, such as cooling or heating systems, to further optimize the air environment in the driver's cab.

[0039] In practical applications, when the air conditioning system in the cab is started, the blower 6 begins to work, drawing fresh air from outside the cab into the fresh air filter 3 through the air intake duct for filtration. The filtered air then enters the fresh air chamber 1 through the fresh air duct 2 and is blown into the internal circulation duct 7 by the blower 6, ultimately being evenly distributed throughout the cab.

[0040] This process not only provides a continuous supply of fresh air to the cab, but also effectively maintains a positive pressure environment inside the cab, preventing external dust and pollutants from entering, thereby significantly improving the air quality inside the cab and creating a more comfortable and healthy working environment for the driver.

[0041] In an optional implementation, the fresh air duct 2 includes multiple duct modules; the multiple duct modules are spliced ​​together.

[0042] In this embodiment, the fresh air duct 2 is modularized, that is, multiple duct modules are spliced ​​together to form it.

[0043] This setup enables modular and universal components, facilitating subsequent maintenance.

[0044] In an optional implementation, the duct module is spliced ​​in at least one of the following methods: snap-fit, transition fit, interference fit, or bolt connection.

[0045] In this embodiment, the splicing method between the air duct modules can be at least one of snap-fit, transition fit, interference fit or bolt connection, so that subsequent maintenance and replacement can be facilitated by the detachable connection.

[0046] By combining multiple splicing methods, the connection stability between each air duct module can be more effectively guaranteed.

[0047] Specifically, in this embodiment, when the duct module is connected by a snap-fit ​​mechanism, the end of the duct module is designed with a snap-fit ​​structure. This snap-fit ​​mechanism engages with the slots of adjacent modules to achieve a quick connection. The advantage of the snap-fit ​​method is rapid installation, requiring no additional tools, and is suitable for rapid on-site assembly.

[0048] Specifically, in this embodiment, when the connection method of the air duct modules is a transition fit, the air duct modules are connected through a transition fit. A transition fit means that the dimensions of the two components have a certain gap or interference during assembly, but this gap or interference is very small and will not affect the normal assembly and use of the components. Through the transition fit, the air duct modules can fit tightly together, while allowing for a certain degree of thermal expansion and contraction, which is suitable for operating conditions with large temperature variations.

[0049] Specifically, in this embodiment, when the connection method of the air duct modules is an interference fit, the air duct modules are connected through an interference fit. An interference fit means that when two components are assembled, the size of one component is slightly larger than the size of the other component, and a certain force is applied to make the two fit tightly together. This connection method can provide high connection strength and is suitable for working conditions that need to withstand greater pressure or vibration.

[0050] Specifically, in this embodiment, when the duct modules are connected by bolts, the duct modules are fixed together using bolts. Threaded holes are designed on the connection surfaces of the modules, allowing adjacent modules to be tightly connected using bolts. The advantages of bolted connections are high connection strength, good reliability, and suitability for operating conditions requiring long-term stable operation.

[0051] It is understood that in this embodiment, the connection between the air duct modules is one of the above-mentioned methods, but it is not limited to the above-mentioned methods. It can also be other detachable connection methods, as long as the connection between the air duct modules can be achieved.

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

[0053] In this embodiment, the air duct modules are sealed together to ensure efficient airflow transmission within the air duct, prevent air leakage, and avoid external dust and impurities from entering the air duct, thus maintaining air cleanliness.

[0054] Specifically, there are many ways to seal it, such as setting up a sealing structure. Specifically, the sealing structure can be a labyrinth seal or a sealing gasket.

[0055] In an optional embodiment, the air duct modules are sealed together with sealing cotton.

[0056] In this embodiment, the sealing cotton is installed at the joint of the air duct module, specifically at the edge of the module connection surface. A sealing groove is designed on the module connection surface, and the sealing cotton is embedded in the sealing groove to ensure that the sealing cotton can be fully compressed during module assembly, forming a tight sealing layer.

[0057] Specifically, in this embodiment, the sealing cotton has good flexibility and elasticity, which can adapt to the tiny gaps between the air duct modules, provide a reliable sealing effect, and effectively prevent air leakage and dust ingress.

[0058] In an optional embodiment, the fresh air duct 2 is provided with a concave structure.

[0059] In this embodiment, the fresh air duct 2 is provided with a concave structure, which can optimize the airflow transmission path, reduce wind resistance, and improve the performance of the entire duct system.

[0060] Specifically, in this embodiment, the concave structure is the bend of the air duct module. The arc-shaped bend can avoid right-angle turns of the airflow, reduce the airflow resistance at the bend, and make the airflow smoother.

[0061] In an optional embodiment, the fresh air duct 2 is made of plastic.

[0062] In this embodiment, the plastic material has a lower density, which significantly reduces the weight of the air duct compared to traditional metal materials (such as aluminum alloys or steel). The plastic material can be manufactured using injection molding, easily achieving complex air duct structures, thus improving production efficiency and reducing manufacturing costs. The plastic material has excellent corrosion resistance, resisting the erosion of moisture, dust, and chemicals in the interior and exterior environments of the vehicle, allowing the air duct to maintain good performance and extend its service life over long-term use. Furthermore, the low cost of raw materials for the plastic material and the high production efficiency of the injection molding process enable large-scale production, further reducing production costs.

[0063] In this embodiment, the fresh air duct 2 is made of high-strength plastic material, such as polypropylene (PP) or polycarbonate (PC). These materials not only have good mechanical properties, but also sufficient heat resistance and chemical resistance, which can meet the requirements for use in the indoor and outdoor air conditioning ducts of the driver's cab.

[0064] In this embodiment, the fresh air duct 2 is manufactured using an injection molding process. During injection molding, plastic granules are heated to a molten state and then injected into a mold. After cooling, they form the desired duct shape. This process enables high-precision manufacturing, ensuring that the dimensions and shape of the duct meet design requirements.

[0065] In this embodiment, to further improve the durability and aesthetics of the air duct, the surface of the plastic air duct can be treated with a special coating. For example, a UV-resistant protective layer can be applied to prevent material aging caused by long-term exposure to sunlight.

[0066] It is understood that in this embodiment, the material of the fresh air duct 2 is plastic, but it is not limited to plastic. It can also be other materials, such as stainless steel, as long as it can ensure airtightness and deliver fresh air into the fresh air chamber 1.

[0067] In an optional embodiment, a baffle is provided inside the fresh air duct 2.

[0068] In this embodiment, a deflector is installed inside the fresh air duct 2 of the external circulation air conditioning duct. This design can effectively optimize the airflow transmission path, reduce wind resistance, improve airflow transmission efficiency, and ensure that the airflow can be more evenly distributed into the driver's cabin.

[0069] In this embodiment, the shape of the deflector is arc-shaped or beveled, avoiding right-angle turns, which can effectively reduce the airflow resistance at the deflector and allow the airflow to pass more smoothly.

[0070] In an optional embodiment, the air inlet 5 of the air inlet duct is provided with a filter screen.

[0071] In this embodiment, a filter screen is installed at the air inlet 5 of the air inlet pipe of the external circulation air conditioning duct, which can pre-filter the fresh air entering the cab, remove large particles of dust and impurities, thereby improving air quality and extending the service life of the subsequent filtration system.

[0072] Specifically, pre-filtration through the filter screen effectively intercepts large particles of dust, sand, insects, and other impurities, preventing these substances from entering the air duct system. This reduces the burden on the fresh air filter element 3, extends its service life, and also avoids damage to components such as the blower 6 and the air duct, ensuring the stable operation of the system.

[0073] In this embodiment, the filter screen is made of high-strength metal wire mesh or plastic fiber mesh, which has good air permeability and filtration performance. Metal wire mesh is usually made of stainless steel or aluminum alloy, which has the characteristics of corrosion resistance and high temperature resistance; plastic fiber mesh has the advantages of being lightweight and low cost.

[0074] Secondly, this utility model provides a tractor that includes the external circulation air conditioning duct described in any of the foregoing embodiments.

[0075] The beneficial effects of this utility model embodiment are:

[0076] Through independent air intake ducts and fresh air duct 2, fresh external air can be continuously introduced and impurities filtered, effectively improving the air quality in the cab; the blower 6 is independently set in the fresh air chamber 1 to maintain a positive pressure environment in the cab, prevent external pollutants from entering, and at the same time deliver air evenly, avoiding local temperature differences and improving overall comfort; the fresh air filter 3 is arranged at the bottom of the cab, which is convenient for replacement and maintenance, reduces maintenance costs, and enhances the stability and adaptability of the system.

[0077] 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 external circulation air conditioning duct for connecting the interior and exterior of a driver's cab, characterized in that, This includes air intake ducts, fresh air filters, fresh air ducts, fresh air chambers, blowers, and internal circulation ducts; The air inlet of the air inlet duct is located at the top of the cab, the fresh air filter is located at the bottom of the cab, and the air inlet duct is connected to the air inlet end of the fresh air filter through the front pillar of the cab. The air outlet of the fresh air filter is connected to the air inlet of the fresh air duct, and the air outlet of the fresh air duct is connected to the fresh air chamber. The fresh air cavity is connected to the internal circulation air duct; The blower is installed inside the fresh air chamber and is used to blow fresh air from outside the cab into the internal circulation air duct.

2. The external circulation air conditioning duct according to claim 1, characterized in that, The fresh air duct includes multiple duct modules; Multiple air duct modules are spliced ​​together.

3. The external circulation air conditioning duct according to claim 2, characterized in that, The air duct module is spliced ​​in at least one of the following ways: snap-fit, transition fit, interference fit, or bolt connection.

4. The external circulation air conditioning duct according to claim 2, characterized in that, The air duct modules are sealed together.

5. The external circulation air conditioning duct according to claim 4, characterized in that, The air duct modules are sealed together with sealing cotton.

6. The external circulation air conditioning duct according to claim 1, characterized in that, The fresh air duct is equipped with a concave structure.

7. The external circulation air conditioning duct according to claim 1, characterized in that, The fresh air duct is made of plastic.

8. The external circulation air conditioning duct according to claim 1, characterized in that, The fresh air duct is equipped with a baffle plate inside.

9. The external circulation air conditioning duct according to claim 1, characterized in that, The air inlet of the air inlet duct is equipped with a filter screen.

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

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