Agricultural tractor

Abstract

The present invention relates to technology for improving the cooling efficiency of an air conditioner in an agricultural tractor. Provided is an agricultural tractor comprising: a blower (131) that draws in outside air; a temperature control unit (132) that is provided with the air (hereinafter referred to as 'inflow air') drawn in from the blower (131) and regulates the temperature of the inflow air; and an air guide part (133) that guides the flow direction of the inflow air so that the inflow air uniformly reaches the temperature control unit (132). The present invention has the effect of improving cooling efficiency because the inflow air drawn into the air conditioner by the blower (131) uniformly reaches an evaporator.

Description

agricultural tractor

[0001] The present invention relates to an agricultural tractor, and more specifically to an air conditioner.

[0002] Agricultural tractors can perform various agricultural tasks such as cultivation, spraying fertilizers and pesticides, harvesting, and transportation.

[0003] Agricultural tractors can perform various types of agricultural tasks by attaching and detaching various implements.

[0004] Working tools include rotary tillers, plows, harrows, loaders, and backhoes.

[0005] Generally, agricultural tractors with a certain horsepower or more have a cabin.

[0006] The cabin forms the driver's passenger space and isolates the passenger space from the external environment.

[0007] The driver can perform operations necessary for driving and work in a comfortable environment created within a closed passenger space.

[0008] To create a comfortable environment for the driver inside the passenger compartment, the temperature environment within the cabin can be considered first.

[0009] The temperature environment inside the cabin is affected by the external environment.

[0010] In the case of summer, the passenger compartment may feel hot to the driver due to the high temperature external environment, and in the case of winter, the passenger compartment may feel cold to the driver due to the low temperature external environment.

[0011] Agricultural tractors are equipped with air conditioners to optimize the temperature environment within the passenger compartment for the driver.

[0012] The air conditioner generates air to regulate the temperature of the passenger compartment.

[0013] Figure 1 is a reference diagram for explaining the structure of a conventional air conditioner.

[0014] Referring to FIG. 1, the air conditioner (10) is installed on the roof (L) of the cabin.

[0015] The air conditioner (10) includes a blower (11), an evaporator (12), and a heater (13).

[0016] The blower (11) is configured to suck in external air.

[0017] The evaporator (12) is configured to control the temperature of the air (hereinafter referred to as ‘incoming air’) introduced by the blower (11).

[0018] When incoming air passes through the evaporator (12), the air that has undergone heat exchange while passing through the evaporator (12) becomes cold.

[0019] When the air conditioner operates as a cooling unit, cold air from the evaporator (12) is supplied to the passenger compartment through the duct (D).

[0020] The heater (13) is configured to control the temperature of the incoming air.

[0021] The incoming air passes through the evaporator (12) and the heater (13), and the heat-exchanged air becomes warm.

[0022] When the air conditioner (10) operates as a heater, warmed air from the heater (13) is supplied to the passenger compartment through the duct (D).

[0023] When looking at the flow of incoming air from the blower (11) to the evaporator (12), the path (V) for the incoming air passing through the blower (11) to reach the evaporator (12) is arranged asymmetrically, so that the incoming air is concentrated in a local area at the front of the evaporator (12).

[0024] As mentioned above, when the incoming air is concentrated in a localized area of ​​the evaporator due to the structural or design characteristics of the air conditioner, the following problems occurred.

[0025] First, as areas within the total surface area of ​​the evaporator that are not reached by the incoming air were created, the heat exchange surface area was reduced, and the cooling performance of the air conditioner could be degraded.

[0026] Second, as the cooling efficiency of the air conditioner decreases, the air conditioner operates excessively to provide low-temperature air in the passenger compartment, which can cause components such as the blower and evaporator to overheat or fail due to overload.

[0027] [Prior Art Literature]

[0028] [Patent Literature]

[0029] (Patent Document 1) Korean Published Patent Application No. 10-2009-0063731

[0030] (Patent Document 2) Korean Registered Patent Publication No. 10-0699976

[0031] The present invention is intended to solve the aforementioned problems and was conceived from consideration of a structure to improve the cooling efficiency of an air conditioner.

[0032] To achieve this purpose, an agricultural tractor according to one embodiment of the present invention comprises: a main body (110) for driving on a work site or supporting the operation of a work implement on a work site; a cabin (120) coupled to the main body (110) and forming a passenger space for a driver who performs operations necessary for at least one of driving and working; an air conditioner (130) for generating air (hereinafter referred to as 'regulated air') to regulate the temperature of the passenger space; and a duct (140) for guiding the regulated air, whose temperature has been regulated by the air conditioner (130), to the passenger space; wherein the air conditioner (130) comprises: a blower (131) for sucking in external air; a temperature control unit (132) for regulating the temperature of the incoming air when the air (hereinafter referred to as 'incoming air') sucked in from the blower (131) is provided; and an air guide unit (133) for guiding the flow direction of the incoming air so that the incoming air reaches the temperature control unit (132) uniformly. It may include.

[0033] The cabin (120) includes a roof (121L) covering the upper part of the passenger space; and the air conditioner (130) can be installed on the roof (121L).

[0034] The temperature control unit (132) comprises an evaporator (132a) for controlling the temperature of the incoming air; and a guide (132c) for guiding the air that has passed through the evaporator (132a) to the duct (140); and the air guide unit (133) may be positioned between the blower (131) and the evaporator (132a).

[0035] The above temperature control unit (132) further includes a heater (132b) for controlling the temperature of the incoming air; and when the heater (132b) is operated, the guide (132c) can guide the incoming air to the heater (132b).

[0036] The air guide section (133) comprises: a plurality of first guide baffles (133a) arranged opposite to the evaporator (132a) and spaced apart at a predetermined interval along the longitudinal direction; and a second guide baffle (133b) coupled perpendicularly to the plurality of first guide baffles (133a); wherein the plurality of first guide baffles (133a) may be configured to rotate in the left and right directions with the coupling point (CP) with the second guide baffle (133b) as the axis of rotation.

[0037] The plurality of first guide baffles (133a) are arranged obliquely at a predetermined angle with respect to the second guide baffle (133b), and can form a path through which the incoming air passing through the air guide section (133) is dispersed to the left and right.

[0038] The blower (131) is composed of a plurality of blower fans (131a, 131b), and the air guide section (133) is provided in a plurality, and the plurality of air guide sections (133-1, 133-2) can be arranged in a 1:1 correspondence with the plurality of blower fans (131a, 131b).

[0039] The plurality of first guide baffles (133a-1 to 133a-3) included in any one of the aforementioned plurality of air guide sections (133-1, 133-2) (hereinafter referred to as the 'first air guide section (133-1)') are arranged obliquely at a positive angle from a reference position where the side of the first guide baffle (133a) and the side of the second guide baffle (133b) are perpendicular, and the plurality of first guide baffles (133a-4 to 133a-6) included in another air guide section adjacent to the first air guide section (133-1) (hereinafter referred to as the 'second air guide section (133-2)') are arranged obliquely at a negative angle from the reference position, and the first air guide section (133-1) and the second air guide section (133-2) are the When incoming air passes through, the above hydraulic air can form a path that disperses to the left and right.

[0040] The second guide baffle (133b) may be configured to rotate in the up and down direction with the connection point (CP) with the first guide baffle (133a) as the axis of rotation.

[0041] As explained above, according to the present invention, the following effects can be derived.

[0042] First, as the incoming air is uniformly distributed and passes through the evaporator, it ensures high cooling efficiency and can optimize cooling performance.

[0043] Second, as cooling performance is optimized, the overall performance of the air conditioner can also be improved.

[0044] Third, as the performance of the air conditioner improves, the burden on each component is reduced during operation, and operational stability can be guaranteed.

[0045] Fourth, as the operational stability of the air conditioner is ensured, maintenance costs can be reduced.

[0046] Fig. 1 is a reference diagram illustrating a conventional air conditioner.

[0047] Figure 2 is a reference diagram for explaining an agricultural tractor.

[0048] FIG. 3 is a schematic diagram illustrating an air conditioner according to one embodiment of the present invention.

[0049] FIG. 4 is a reference diagram for explaining the airflow when the air conditioner shown in FIG. 3 performs a cooling or heating function.

[0050] FIGS. 5 and 6 are conceptual diagrams for explaining an air guide section according to an embodiment of the present invention.

[0051] FIG. 7 is a reference diagram analyzing the deflection of incoming air passing through an evaporator when the air guide proposed by the present invention is not installed.

[0052] FIGS. 8 and 9 are perspective views illustrating the shape of an air guide portion according to an embodiment of the present invention.

[0053] FIG. 10 is a perspective view illustrating the arrangement structure of an air guide section according to one embodiment of the present invention.

[0054] Preferred embodiments according to the present invention are described with reference to the accompanying drawings, provided that for the sake of brevity, descriptions of well-known configurations are omitted or compressed as much as possible.

[0055] <Brief Overview of Agricultural Tractors>

[0056] Figure 2 is a reference diagram for explaining an agricultural tractor.

[0057] Referring to FIG. 2, an agricultural tractor (100) according to one embodiment of the present invention includes a main body (110), a cabin (120), an air conditioner (130), and a duct (140).

[0058] The main body (110) drives the work target area or supports the work of the work machine on the work target area.

[0059] The main body (110) is equipped with components for driving and performing tasks. Examples of such components include a power source, a transmission, and a steering device.

[0060] The cabin (120) is coupled to the main body (110) and forms a passenger space for a driver to perform operations required for at least one of driving and working.

[0061] Various control devices necessary for operating an agricultural tractor, such as the driver's seat, steering wheel, brake pedal, gear lever, and accelerator pedal, are arranged in the passenger compartment.

[0062] The cabin (120) has a door that the driver can enter and exit, and various windows or windows.

[0063] The doors and various windows can be opened or closed according to the choice of the operator during work.

[0064] Depending on whether the doors and windows are open or closed, the passenger space can be connected to or isolated from the external environment.

[0065] The cabin (120) includes a roof (121L) that covers the upper part of the passenger space.

[0066] The air conditioner (130) generates air (hereinafter referred to as ‘regulated air’) to regulate the temperature of the passenger space.

[0067] The air conditioner (130) mentioned in the present invention is a component that forms at least part of an air conditioning system called HVAC (Heating, Ventilating and Air Conditioning) and can be installed to be coupled to a roof (121L).

[0068] A detailed description of the air conditioner (130) will be provided later.

[0069] The duct (140) is connected to the air conditioner (130) and is configured to guide controlled air into the passenger compartment.

[0070] One or more ducts (140) may be provided.

[0071] The duct (140) can have various structures and shapes depending on the installation location of the air conditioner (130), the number of ducts (140), the installation location of the ducts (140), etc.

[0072] For example, the duct (140) can be divided into a first duct (140a) and a second duct (140b) as illustrated in FIG. 3.

[0073] The first duct (140a) guides controlled air to the window side within the passenger compartment to remove moisture from the window of the agricultural tractor (100).

[0074] The second duct (140b) guides controlled air into the passenger compartment for indoor ventilation and temperature control of the passenger compartment.

[0075] In the air conditioner (130), a switch (S) may be positioned to open and close the first duct (140a) and the second duct (140b).

[0076] The switch (S) rotates based on a point and can selectively open and close the first duct (140a) and the second duct (140b) depending on the use of the controlled air.

[0077] The switch (S) may be rotated so that both the first duct (140a) and the second duct (140b) are opened.

[0078] Hereinafter, the air conditioner (130) proposed by the present invention will be described with reference to the drawings.

[0079] <Explanation of Air Conditioners>

[0080] FIG. 3 is a reference diagram for explaining an air conditioner (130) that can be applied to an agricultural tractor (100) according to one embodiment of the present invention.

[0081] Referring to FIG. 3, the air conditioner (130) includes a blower (131), a temperature control unit (132), an air guide unit (133), and a case (not shown).

[0082] The blower (131) sucks in outside air.

[0083] The blower (131) includes at least one blower fan (131a, 131b).

[0084] The temperature control unit (132) is configured to control the temperature of the incoming air when air (hereinafter referred to as 'incoming air') sucked in from the blower (131) is provided.

[0085] The temperature control unit (132) includes an evaporator (132a), a heater (132b), and a guide (132c).

[0086] The evaporator (132a) is configured to control the temperature of the incoming air.

[0087] The incoming air that reaches the evaporator (132a) passes through the evaporator (132a) and is cooled through heat exchange.

[0088] The air cooled by passing through the evaporator (132a) flows into the duct (140) and is guided into the passenger compartment as controlled air.

[0089] The interior of the cabin (120) can be cooled by controlled air guided into the passenger space.

[0090] The heater (132b) is configured to control the temperature of the incoming air.

[0091] The incoming air that passes through the evaporator (132a) and reaches the heater (132b) passes through the heater (132b) and is heated through heat exchange.

[0092] The air heated by passing through the heater (132b) flows into the duct (140) and is guided into the passenger compartment as controlled air.

[0093] The guide (132c) is configured to guide air passing through the evaporator (132a) to at least one of the duct (140) and the heater (132b).

[0094] The guide (132c) is placed between the evaporator (132a) and the heater (132b).

[0095] The air passing through the evaporator (132a) can be moved to at least one of a first flow path (L1) which is configured to move toward the duct (140) and a second flow path (L2) which is configured to move toward the heater (132b).

[0096] The guide (132b) rotates based on a point depending on whether the air conditioner (130) performs a cooling or heating function and opens and closes the first path (L1) and the second path (L2).

[0097] As illustrated in FIG. 4(a), when the air conditioner (130) performs a cooling function, the guide (132b) can be rotated to close the second flow path (L2) while opening the first flow path (L1).

[0098] As illustrated in FIG. 4(b), when the air conditioner (130) performs a heating function, the guide (132b) can be rotated to close the first flow path (L1) and open the second flow path (L2).

[0099] For reference, the evaporator (132a) or heater (132b) is selectively operated depending on whether the air conditioner (130) performs a cooling or heating function.

[0100] For example, when performing a heating function, the evaporator (132a) does not operate, so the incoming air passes through the evaporator (132a) and reaches the heater (132b) located at the rear end.

[0101] The air guide section (133) guides the flow direction of the incoming air so that the incoming air reaches the temperature control section (132) uniformly.

[0102] A detailed description of the air guide section (133) will be provided later.

[0103] The case (not shown) accommodates the above-mentioned configurations internally.

[0104] The above-mentioned components are housed in a case and installed in the loop (121L).

[0105] Hereinafter, the air guide part (133) proposed by the present invention will be described with reference to the drawings.

[0106] <Explanation of the Air Guide Section>

[0107] FIGS. 5 and 6 are conceptual diagrams for explaining an air guide section according to an embodiment of the present invention, and FIGS. 7 and 8 are conceptual diagrams illustrating the structure of an air guide section according to an embodiment of the present invention.

[0108] Referring to FIGS. 5 and 6, the air guide section (133) includes a first guide baffle (133a: 133a-1, 133a-2, 133a-3, 133a-4, 133a-5, 133a-6) and a second guide baffle (133b).

[0109] A plurality of first guide baffles (133a) are provided.

[0110] The number of first guide baffles (133a) can be varied according to the size of the air guide section (133).

[0111] A plurality of first guide baffles (133a-1 to 133a-6) are arranged opposite the evaporator (132a) and are installed spaced apart at a predetermined interval along the left-right longitudinal direction in the drawing.

[0112] A plurality of first guide baffles (133a-1 to 133a-6) are provided to be rotatable in the left and right directions with the connection point with the second guide baffle (133b), which will be described later, as the axis of rotation.

[0113] The rotation angle of at least one of the plurality of first guide baffles (133a-1 to 133a-6) may be within ±70˚ from a reference position (RP) where the side of the first guide baffle (133a) and the side of the second guide baffle (133b) are perpendicular.

[0114] More specifically, the rotation angle of at least one of the plurality of first guide baffles (133a-1 to 133a-6) may be within ±60˚ from the reference position (RP).

[0115] If the rotation angle of the plurality of first guide baffles (133a-1 to 133a-6) deviates from the above range, the incoming air may reach a point outside the evaporator (132a) or the path of the incoming air may be blocked, thereby reducing the flow rate of the incoming air provided to the evaporator (132a) and acting as a factor that lowers the cooling efficiency.

[0116] If the rotation angle of a plurality of first guide baffles (133a-1 to 133a-6) deviates from the above range, the possibility of interference between adjacent first guide baffles cannot be ruled out.

[0117] The rotation angle setting range of at least one of the plurality of first guide baffles (133a-1 to 133a-6) mentioned above is based on the previously mentioned elements.

[0118] A plurality of first guide baffles (133a-1 to 133a-6) are arranged obliquely at a predetermined angle with respect to the second guide baffle (133b), forming a path through which incoming air passing through the air guide section (133) is dispersed to the left and right.

[0119] For example, a plurality of first guide baffles (133a-1 to 133a-6) may be arranged obliquely with respect to the central axis (A) shown in the drawing, and the first guide baffles (133a-1 to 133a-3) arranged on the right axis may have a positive angle (+α˚) from the reference position (RP).

[0120] A plurality of first guide baffles (133a-1 to 133a-6) are arranged on the left axis with respect to the central axis (A) shown in the drawing, and the first guide baffles (133a-4 to 133a-6) are arranged obliquely with a negative angle (-α˚) from the reference position (RP).

[0121] As illustrated in FIG. 5, the absolute values ​​of the rotation angles at which a plurality of first guide baffles (133a-1 to 133a-6) are obliquely turned from the reference position (RP) may all be the same.

[0122] As illustrated in FIG. 6, the absolute value of the rotation angle at which a plurality of first guide baffles (133a-1 to 133a-6) are obliquely turned from the reference position (RP) may have a larger value as it is closer to the center axis (A).

[0123] In this regard, referring to FIG. 7, FIG. 7 is a reference diagram analyzing the deflection of incoming air passing through the evaporator (132a) when the air guide section (133) is not arranged.

[0124] As illustrated in FIG. 7, the flow rate of incoming air supplied to the evaporator (132a) side is concentrated near the central axis (A) due to the structure of the air conditioner (130).

[0125] It may be desirable for the first guide baffles (133a-3 and 133a-4) positioned adjacent to the central axis (A) to have a relatively large absolute value of rotation angle compared to the first guide baffles (133a-1 and 133a-6) positioned far from the central axis (A) in order to distribute it evenly across a wide area to the left and right.

[0126] Since the rotation angle of the first guide baffles (133a-1 and 133a-6) positioned far from the central axis (A) increases, the incoming air is supplied to an area outside the evaporator (132a), so it may be desirable to provide a relatively smaller absolute value of the rotation angle compared to the first guide baffles (133a-3 and 133a-4) positioned adjacent to the central axis (A).

[0127] In the case of FIG. 5, the structure was described only with a single air guide section (133) placed in front of the blower (131), but depending on the implementation, multiple air guide sections (133-1, 133-2) may be placed in front of the blower (131) as exemplified in FIG. 6.

[0128] Referring again to FIG. 6 to explain in more detail, when the blower (131) is composed of multiple blower fans (131a, 131b), multiple air guide sections (133) are also provided and can be arranged to correspond 1:1 with the multiple blower fans (131a, 131b).

[0129] A plurality of first guide baffles (133a-1 to 133a-3) included in one of the plurality of air guide sections (133-1, 133-2) (hereinafter referred to as the 'first air guide section (133-1)') are arranged obliquely with a positive angle (+α˚) from the reference position (RP).

[0130] A plurality of first guide baffles (133a-4 to 133a-6) included in another air guide section adjacent to the first air guide section (133-1) (hereinafter referred to as the 'second air guide section (133-2)') are arranged obliquely with a negative angle (-α˚) from the reference position (RP).

[0131] Depending on the number of blower fans (131a, 131b) included in the blower (131) and the structure of the air flow passage (AL, see FIG. 8) provided between the blower (132b) and the evaporator (132b), it may be determined whether a single air guide section (133) or multiple air guide sections (133-1, 133-2) are applied in front of the blower (131).

[0132] An embodiment in which a plurality of air guide sections (133-1, 133-2) are applied to an air conditioner (130) equipped with a plurality of blower fans (131a, 131b) is illustrated in FIG. 8.

[0133] FIG. 8(a) schematically illustrates a side cross-sectional view of at least part of the air conditioner (130), and FIG. 8(b) schematically illustrates a perspective view of at least part of the air conditioner (130).

[0134] Although omitted in FIG. 8(b) which is illustrated with respect to the first air guide section (133-1), a second air guide section (133-2) is arranged adjacently next to the first air guide section (133-1), and the first guide baffles (131a-1 to 131a-3, 131a-4 to 131a-6) included in each of the plurality of air guide sections (133-1, 133-2) are arranged obliquely while rotated in opposite directions.

[0135] The first guide baffles (131a-1 to 131a-3, 131a-4 to 131a-6) included in the first air guide section (133-1) and the second air guide section (133-2), respectively, form a path through which hydraulic air is dispersed to the left and right.

[0136] The rotation angles of the first guide baffles (131a-1 to 131a-6) configured in the plurality of air guide sections (133-1, 133-2) are the same as those discussed in the description of the single air guide section (133) above, so a description thereof is omitted.

[0137] The second guide baffle (133b) is joined perpendicularly to a plurality of first guide baffles (133a).

[0138] Referring to FIG. 9, the second guide baffle (133b) is configured to rotate in the up and down direction with the connection point (CP) with the first guide baffle (133a) as the axis of rotation.

[0139] In this case, a groove (133a-H) is formed in the first guide baffle (133a) with a predetermined depth in the inward direction, and the width of the groove (133a-H) expands outward from the joining point (CP).

[0140] The shape of the groove (133a-H) enables rotation of the second guide baffle (133b) and at the same time limits the radius of rotation of the second guide baffle (133b).

[0141] Proper rotation of the second guide baffle (133b) ensures that the incoming air is evenly distributed across the upper and lower parts of the evaporator (132a).

[0142] Referring to FIG. 10, the second guide baffle (133b) may be provided in a fixed position at one point without performing vertical rotation.

[0143] In this case, a groove (133a-H) is formed in the first guide baffle (133a) with a predetermined depth in the inward direction, and the width of the groove (133a-H) from the joining point (CP) to the end adjacent to the outside is constant.

[0144] A second guide baffle (133b) coupled to a groove (133a-H) provided in a first guide baffle (133a) can function as a structure to support a plurality of first guide baffles (133a).

[0145] Meanwhile, the plurality of first guide baffles (133a-1 to 133a-6) and second guide baffles (133b) may be fixed at the previously adjusted placement angles, with the placement angles of the workers being adjusted as intended during the installation stage.

[0146] When incoming air comes into contact with at least one of the plurality of first guide baffles (133a-1 to 133a-6) and second guide baffles (133b), the direction of incoming air flow may be changed.

[0147] At least one of the plurality of first guide baffles (133a-1 to 133a-6) and second guide baffles (133b) may be rotated and moved in an intended rotational direction, i.e., a positive or negative angle, within the rotational angle range described above, depending on the flow rate of incoming air provided from the blower (131).

[0148] For example, when incoming air comes into contact with at least one of a plurality of first guide baffles (133a-1 to 133a-6) and a second guide baffle (133b), the first guide baffles (133a-1 to 133a-6) rotate at a predetermined angle in a predetermined rotational direction, and the degree of rotation varies depending on the contact area of ​​the incoming air.

[0149] As another example, when a sensor generates flow rate information regarding the flow rate distribution reaching the installation point of the first guide baffles (133a-1 to 133a-6), the rotation angle of at least one of the first guide baffles (133a-1 to 133a-2) and the second guide baffle (133b) may be controlled according to the flow rate information collected in real time by the sensor.

[0150] In summary, the air guide section (133) proposed by the present invention is positioned between the blower (131) and the evaporator (132a) so that the incoming air reaches the evaporator (132a) uniformly, thereby contributing to improving cooling efficiency.

[0151] The embodiments described above are merely preferred examples of the present invention and may have various applications. Therefore, the present invention should not be understood as being limited only to the contents described above. Instead, the scope of the present invention should be understood as the separately described claims and their equivalents.

Claims

1. A main body (110) that drives a work target area or supports the operation of a work machine on a work target area; A cabin (120) that is coupled to the main body (110) and forms a passenger space for a driver who performs operations required for at least one of driving and working; An air conditioner (130) that generates air (hereinafter referred to as 'controlled air') for controlling the temperature of the above-mentioned passenger space; and A duct (140) that guides temperature-controlled air from the air conditioner (130) to the passenger space; comprising, The above air conditioner (130) is, A blower (131) that sucks in outside air; A temperature control unit (132) that controls the temperature of the incoming air when air (hereinafter referred to as 'incoming air') sucked in from the blower (131) is provided; and An air guide section (133) that guides the flow direction of the incoming air so that the incoming air reaches the temperature control section (132) uniformly; comprising Agricultural tractor (100).

2. In Paragraph 1, The cabin (120) includes a roof (121L) covering the upper part of the passenger space; and The above air conditioner (130) is installed in the above loop (121L). Agricultural tractor (100).

3. In Paragraph 1, The above temperature control unit (132) is, An evaporator (132a) for controlling the temperature of the incoming air; and A guide (132c) for guiding the air that has passed through the evaporator (132a) to the duct (140); comprising, The air guide section (133) is positioned between the blower (131) and the evaporator (132a). Agricultural tractor (100).

4. In Paragraph 3, The above temperature control unit (132) is, It further includes a heater (132b) for controlling the temperature of the incoming air, and When the heater (132b) is operated, the guide (132c) guides the incoming air to the heater (132b). Agricultural tractor (100).

5. In Paragraph 3, The above air guide part (133) is, A plurality of first guide baffles (133a) arranged opposite to the above evaporator (132a) and spaced apart at a predetermined interval along the longitudinal direction; and A second guide baffle (133b) coupled perpendicularly to the plurality of first guide baffles (133a); comprising, The plurality of first guide baffles (133a) are configured to be rotatable in the left and right directions with the connection point (CP) with the second guide baffle (133b) as the axis of rotation. Agricultural tractor (100).

6. In Paragraph 5 The plurality of first guide baffles (133a) are obliquely arranged at a predetermined angle with respect to the second guide baffle (133b), forming a path through which the incoming air passing through the air guide section (133) is dispersed to the left and right. Agricultural tractor (100) 7. In Paragraph 5, The above blower (131) is composed of a plurality of blower fans (131a, 131b), and The above air guide section (133) is provided in multiple numbers, The above-mentioned plurality of air guide sections (133-1, 133-2) are arranged in a 1:1 correspondence with the above-mentioned plurality of blower fans (131a, 131b). Agricultural tractor (100).

8. In Paragraph 7, The plurality of first guide baffles (133a-1 to 133a-3) included in any one of the aforementioned plurality of air guide parts (133-1, 133-2) (hereinafter referred to as the 'first air guide part (133-1)') are arranged obliquely at a positive angle from a reference position where the side of the first guide baffle (133a) and the side of the second guide baffle (133b) are perpendicular to each other, The plurality of first guide baffles (133a-4 to 133a-6) included in another air guide section adjacent to the first air guide section (133-1) (hereinafter referred to as the 'second air guide section (133-2)') are arranged obliquely with a negative angle from the reference position, The first air guide section (133-1) and the second air guide section (133-2) form a path through which the hydraulic air is dispersed left and right when the incoming air passes through. Agricultural tractor (100).

9. In Paragraph 5 or 7 The second guide baffle (133b) is configured to be rotatable in the up and down direction with the connection point (CP) with the first guide baffle (133a) as the axis of rotation. Agricultural tractor (100).

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