Agricultural tractor and cabin of agricultural tractor

Abstract

The present invention relates to an agricultural tractor. According to the present invention, an outward duct capable of supplying temperature-controlled air to a worker working outside is provided. The present invention improves work efficiency by supplying temperature-controlled air to the worker working outside.

Description

Agricultural tractors and cabins of agricultural tractors

[0001] The present invention relates to air conditioning technology for agricultural tractors.

[0002] An agricultural tractor is a work vehicle that can perform necessary tasks by attaching and detaching various work equipment necessary for agricultural work.

[0003] Some of the implements that can be mounted on agricultural tractors include loaders, lawn mowers, rotavators, plows, and backhoes.

[0004] Typically, agricultural tractors with a certain horsepower or more have a cabin.

[0005] The cabin isolates the driver's seat from the outside environment.

[0006] The cabin forms the driver's compartment, which is the interior space where the driver's seat is located.

[0007] Drivers can work in a comfortable environment created within a closed driver's cabin.

[0008] Temperature environment can be considered as an example of a comfortable environment.

[0009] In summer or winter, the temperature in the driver's cabin may differ from the outside temperature.

[0010] Agricultural tractors have air conditioners to keep the temperature inside the cab different from the outside temperature.

[0011] The air conditioner may be a heater to increase the temperature in the cab.

[0012] The air conditioner may be a cooler to lower the temperature in the cab.

[0013] Air whose temperature is controlled by the air conditioner is guided through a duct and introduced into the driver's cabin.

[0014] The driver's cabin can be provided with an appropriate temperature environment by means of temperature-controlled air.

[0015] Among the implements, some, such as loaders, can be operated by an operator within the cab. The operator can perform the work within the cab, which has an appropriate temperature environment.

[0016] Among the implements, some, such as the backhoe, are operated by an external operator, who may or may not be the operator.

[0017] Operators operating backhoes must work while exposed to the external environment. Of course, workers exposed to the external environment cannot be protected by the comfortable environment maintained in the cab by the air conditioning system. The harsher the external environment, the more difficult it is for workers to perform their work. Consequently, work efficiency decreases.

[0018] [Prior Art Literature]

[0019] [Patent Document]

[0020] (Patent Document 1) Republic of Korea Publication No. 10-2017-0115067

[0021] The present invention was conceived from consideration of a technology that can improve the working environment outside the driver's cab.

[0022] An agricultural tractor according to a first aspect of the present invention comprises: a power generator that generates power necessary for driving and working; a main body that drives with power generated by the power generator; a driver's seat on which a driver who performs driving necessary for driving the main body can sit; a cabin that is coupled to the main body and forms a driver's compartment with the driver's seat arranged therein; an air conditioner that generates temperature-regulated air (hereinafter referred to as "regulated air") to control the temperature of the driver's compartment; an inward duct that forms an inward passage that guides the regulated air generated by the air conditioner to the driver's compartment; and an outward duct that forms an outward passage that guides the regulated air generated by the air conditioner to the outside of the cabin.

[0023] The above-mentioned outward duct is installed to guide the conditioned air in the above-mentioned inward duct to the outside of the cabin.

[0024] The above-mentioned outward duct is installed to guide the conditioned air to the worker at the rear of the cabin.

[0025] The above inward duct has a branch port formed therein for sending conditioned air to the outward duct, and the outward duct is installed so as to guide conditioned air from the inward duct to the outside of the cabin through the branch port.

[0026] The above-mentioned outward duct has an inlet through which conditioned air flows into the above-mentioned outward passage and an outlet through which conditioned air flows out from the above-mentioned outward passage to the outside of the cabin, wherein the inlet is aligned with the branch port, and the outlet is formed so that conditioned air flows out toward the rear of the cabin.

[0027] The inward duct has an inlet through which conditioned air flows into the inward passage and a plurality of outlets through which conditioned air flows out from the inward passage to the driver's cabin, and the inward duct has at least one partition through which conditioned air flowing into the inward passage through the inlet is divided into the plurality of outlets and flows out from the inward passage, and the branching opening is located behind the at least one partition.

[0028] It may further include a switch for opening and closing the above-mentioned external passage.

[0029] It may further include a switch capable of automatically opening and closing the above-mentioned inward passage.

[0030] The cabin of an agricultural tractor according to the present invention comprises: a support frame forming a skeleton for forming a driver's cabin; a roof coupled to the support frame with a structure that is placed on the support frame; an inner cover arranged to face the driver's cabin and forming a ceiling; an inward duct forming an inward passage for guiding air whose temperature is controlled by an air conditioner (hereinafter referred to as "controlled air") to the driver's cabin; and an outward duct forming an outward passage for guiding controlled air generated by the air conditioner to the outside of the cabin; wherein the roof forms a duct room between the roof and the inner cover, and the inward duct is arranged in the duct room.

[0031] The above inward duct has a branch port formed therein for sending conditioned air to the outward duct, and the outward duct is installed so as to guide conditioned air from the inward duct to the outside of the cabin through the branch port.

[0032] The above-mentioned outward duct has an inlet through which conditioned air flows into the above-mentioned outward passage and an outlet through which conditioned air flows out from the above-mentioned outward passage to the outside of the cabin, wherein the inlet is aligned with the branch port, and the outlet is formed so that conditioned air flows out toward the rear of the cabin.

[0033] The above branch hole is formed to open upward.

[0034] It may further include an opening / closing member for opening / closing the above-mentioned external passage.

[0035] The inward duct has an inlet through which conditioned air flows into the inward passage and a plurality of outlets through which conditioned air flows out from the inward passage to the driver's cabin, and the inward duct has at least one partition through which conditioned air flowing into the inward passage through the inlet is divided into the plurality of outlets and flows out from the inward passage, and the branching opening is located behind the at least one partition.

[0036] According to the present invention, workers outside can work in a more comfortable temperature environment, so the following effects are achieved.

[0037] First, workers can be protected from harsh external temperature environments.

[0038] Second, workers can work in a more comfortable temperature environment.

[0039] Third, work efficiency is improved because work can be done more easily.

[0040] Figure 1 is a conceptual diagram of an agricultural tractor according to one embodiment of the present invention.

[0041] Figure 2 is a reference drawing for explaining the relationship between the external duct and the internal duct in the agricultural tractor of Figure 1.

[0042] Figure 3 is a reference drawing for explaining the plug applied to the agricultural tractor of Figure 1.

[0043] Figure 4 is a schematic perspective view of a cabin that can be applied to the agricultural tractor of Figure 1.

[0044] Fig. 5 is a perspective view of the main parts of the cabin applied to the agricultural tractor of Fig. 1.

[0045] Figures 6 to 13 are reference drawings for explaining the main parts of Figure 5.

[0046] Figure 14 is a reference drawing for explaining another example of an agricultural tractor (AT).

[0047] Fig. 15 is a reference drawing for explaining the structure related to the arrangement of the H-back in the agricultural tractor of Fig. 1.

[0048] A preferred embodiment according to the present invention is described with reference to the attached drawings, but for the sake of brevity, descriptions of well-known components are omitted or compressed as much as possible.

[0049] Overview of Agricultural Tractors

[0050] FIG. 1 is a conceptual diagram of an agricultural tractor (AT) according to one embodiment of the present invention.

[0051] Figure 1 shows a state in which a work machine (WA) with a work seat (WS) is connected to the rear of an agricultural tractor (AT).

[0052] The agricultural tractor (AT) of Fig. 1 includes a power generator (10), a body (20), a driver's seat (30), a cabin (40), an air conditioner (50), an inward duct (60), an outward duct (70), and a switch (80).

[0053] The power generator (10) generates power required for driving or working of an agricultural tractor (AT).

[0054] The power generator (10) may be an internal combustion engine such as a gasoline engine or a diesel engine.

[0055] The power generator (10) may be an electric motor.

[0056] The main body (20) can be driven by power generated from the power generator (10).

[0057] The main body (20) transmits power generated from the power generator (10) to the work machine (WA), thereby enabling work to be performed by the work machine (WA).

[0058] The driver's seat (30) is provided for the driver (DM) to sit on.

[0059] The driver (DM) sits in the driver's seat (30) and performs the driving required for driving the main body (20).

[0060] Around the driver's seat (30), various control means necessary for driving an agricultural tractor (AT), such as a steering wheel (H), brake pedal, gear lever, and accelerator pedal, are arranged.

[0061] The cabin (40) is connected to the main body (20).

[0062] The cabin (40) forms a driver's compartment (DR) in which a driver's seat (30) is placed inside.

[0063] The cabin (40) has a door through which the driver (DM) can enter and exit, and various windows or windows.

[0064] The doors and various windows can be opened and closed according to the choice of the driver while working.

[0065] Depending on whether the doors and windows are open or closed, the driver's compartment (DR) can be connected to or isolated from the outside environment.

[0066] The cabin (40) includes a roof (42) covering the upper part of the driver's compartment (DR).

[0067] An air conditioner (50) is provided to control the temperature of the driver's compartment (DR).

[0068] The air conditioner (50) generates temperature-controlled air.

[0069] The air conditioner (50) may be a heater for increasing the temperature of the air.

[0070] The air conditioner (50) may be a cooler for lowering the temperature of the air.

[0071] The air conditioner (50) may include both a heater and a cooler.

[0072] The capacity and installation location of the air conditioner (50) may vary depending on the design of the agricultural tractor (AT).

[0073] At least some of the components forming the air conditioner (50) can be installed around the cabin (40).

[0074] At least some of the components forming the air conditioner (50) may be located at the rear of the cabin (40) and may be installed in a fixed manner to the cabin (40).

[0075] Depending on the implementation, the air conditioner (50) may be installed fixedly on a structure other than the cabin (40).

[0076] Operating means for operating the air conditioner (50) are arranged around the driver's seat (30).

[0077] The inward duct (60) forms an inward passage (61) that guides temperature-controlled air (hereinafter referred to as “controlled air”) generated by the air conditioner (50) to the driver’s compartment (DR).

[0078] Conditioned air generated by the air conditioner (50) can be introduced into the driver's compartment (DR) by moving along the inward passage (61).

[0079] One or more inward ducts (60) may be provided.

[0080] The inward duct (60) can have various structures and shapes depending on the installation location of the air conditioner (50), the number of inward ducts (60), the outlet location of the conditioned air flowing out from the inward passage (61) to the driver's compartment (DR), the number of outlet locations, etc.

[0081] The outward duct (70) forms an outward passage (71) that guides the conditioned air generated by the air conditioner (50) to the worker (WM) outside the cabin (40).

[0082] Conditioned air generated by the air conditioner (50) can be supplied to a worker (WM) outside the cabin (40) by moving along the outward passage (71).

[0083] One or more external ducts (70) may be provided.

[0084] The external duct (70) can have various structures and shapes depending on the installation location of the air conditioner (50), the number of external ducts (70), the arrangement relationship with the internal duct (60), the location of the worker (WM) outside the cabin (40), etc.

[0085] The outward duct (70) can be installed so that the conditioned air is sprayed toward the rear from the rear of the driver's seat (DS).

[0086] According to a preferred example, the outward duct (70) can be installed to supply conditioned air to a worker (WM) sitting on a work seat (WS) at the rear of a cabin (40) to operate a work machine (WA) called a backhoe.

[0087] As in the reference drawing of Fig. 2, the outward duct (70) can be installed to guide the conditioned air in the inward passage (61) of the inward duct (60) to the worker (WM) outside the cabin (40). The outward passage (71) is connected to the inward passage (61). Accordingly, the conditioned air generated by the air conditioner (50) is branched off from the inward passage (61) and then supplied to the worker (WM) outside the cabin (40) through the outward passage (71).

[0088] The conditioned air can be implemented to be supplied to both the driver's compartment (DR) and the worker (WM) outside the cabin (40).

[0089] The conditioned air may be implemented to be selectively supplied to the operator (DR) and the worker (WM) outside the cabin (40).

[0090] The driver (DM) can arrange for the conditioned air to be supplied to both the driver's compartment (DR) and the worker (WM) outside, or only to one side.

[0091] The opener (80) opens and closes the outward passage (71).

[0092] As referenced in Fig. 3, the opener (80) may have a stopper (81) which is an opening / closing member for opening / closing the outward passage (71).

[0093] The stopper (81) can be installed so that the rear end of the external passage (71) can be manually opened and closed by the driver (DM) or worker (WM).

[0094] Depending on the implementation, the opener (80) may be equipped to automatically open and close the outward passage (71).

[0095] If the opener (80) is implemented to manually open and close the outward passage (71), the production cost can be reduced, and if it is implemented to automatically open and close the outward passage (71), it is convenient to use.

[0096] Among the above configurations, the loop (42), the inward duct (60), the outward duct (70), and the switch (80) can be grouped as components constituting the cabin (40) depending on the implementation. With regard to the cabin (40), a preferred example will be examined later with a different table of contents.

[0097] Let us continue by examining the use of an agricultural tractor (AT) with the above configuration.

[0098] When a worker (WM) operates a work machine (WA) from the outside, the worker (WM) operates a switch (80) to open an external passage (71).

[0099] The conditioned air generated by the air conditioner (50) moves along the inward passage (61) and flows into the driver's compartment (DR).

[0100] A portion of the conditioned air in the inward passage (61) is branched off from the inward passage (61) and supplied to the worker (WM) outside the cabin (40) along the outward passage (71).

[0101] If the driver (DM) and the worker (WM) are different, with the driver (DM) in the driver's compartment (DR) and the worker (WM) outside the cabin (40), the conditioned air needs to be supplied to both the driver's compartment (DR) and the outside of the cabin (40). Therefore, both the inward passage (61) and the outward passage (71) are opened.

[0102] If the driver (DM) and the worker (WM) are the same, the driver (DM) comes out of the driver's cab (DR) and moves to a work position outside the cabin (40). At this time, the driver (DM) can take measures to close the inward passage (61). Then, the conditioned air generated by the air conditioner (50) can be supplied only to the worker (WM) outside the cabin (40) through the outward passage (71).

[0103] In hot weather, the conditioned air may be cooled air, and in cold weather, the conditioned air may be heated air.

[0104] When the work is finished, the worker (WM) operates the closing device (80) to close the outward passage (71).

[0105] <Example for cabin>

[0106] Fig. 4 is a schematic perspective view of a cabin (40) that can be applied to the agricultural tractor (AT) of Fig. 1.

[0107] The cabin (40) has a driver's compartment (DR) in which a driver (DM) can ride to drive an agricultural tractor (AT).

[0108] The cabin (40) includes a support frame (41) and a roof (42).

[0109] The support frame (41) forms a skeleton for forming the driver's compartment (DR).

[0110] The support frame (41) is equipped with a door, various windows, and other windows that allow the driver (DM) to enter and exit the driver's compartment (DR).

[0111] Doors are installed on the left and right sides of the driver's cabin (DR), and various windows or windows can be installed on the front, back, left and right sides of the driver's cabin (DR) depending on the design.

[0112] The loop (42) is placed above the support frame (41).

[0113] The loop (42) is connected to the support frame (41) in a structure that is placed on the support frame (41) from above.

[0114] The upper part of the driver's cabin (DR) formed on the inside of the support frame (41) is covered by a roof (42).

[0115] Fig. 5 is a perspective view of the main part of the cabin (40) with the support frame (41) removed, and Fig. 6 is an exploded perspective view of the main part of Fig. 5.

[0116] The cabin (40) according to the present embodiment further includes an inner cover (43), an inward duct (60), an outward duct (70), and a plug (81).

[0117] According to this embodiment, the cabin inner cover (43) is arranged to face the driver's compartment (DR) inside the cabin (40) to form a ceiling.

[0118] As shown in the extract of Fig. 7, the inner cover (43) has four first air vents (V1) arranged in a parallel manner in the left and right direction at the front end portion and two second air vents (V2) formed on the left and right sides of the middle portion, respectively.

[0119] The first air vent (V1) is formed to be positioned on the upper front side of the driver (DM), and the second air vent (V2) is formed to be positioned on the upper left and right sides of the driver (DM).

[0120] Conditioned air can be introduced into the driver's compartment (DR) through the air vents (V1, V2).

[0121] The inner cover (43) has regulators (CD) installed in the air vents (V1, V2).

[0122] The controller (CD) can be operated by the driver (DM).

[0123] The driver (DM) can control the direction of the conditioned air flowing into the driver's compartment (DR) or the amount of air flowing in according to the location of the air vents (V1, V2) by operating the controllers (CD).

[0124] The inner cover (43) is placed at the bottom of the loop.

[0125] The loop (42) is placed on the upper side of the inner cover (43).

[0126] The loop (42) is arranged to face the outside of the cabin (40) and forms the outer surface of the upper part of the cabin (40).

[0127] As shown in the reference drawing of Fig. 8, a space forming a duct room (DC) is formed between the loop (42) and the inner cover (43).

[0128] An inward duct (60) and an outward duct (70) are arranged in the duct room (DC). That is, the inward duct (60) and the outward duct (70) are installed between the roof (42) and the inner cover (43).

[0129] The inward duct (60) and the outward duct (70) are provided as a pair, each arranged side by side in the left and right directions.

[0130] The pairs of inward ducts (60) and the pairs of outward ducts (70) have a symmetrical structure.

[0131] As shown in the cutaway perspective view of Fig. 9, the inward duct (60) forms an inward passage (61) for guiding conditioned air to the driver's compartment (DR).

[0132] One inward duct (60) has a first inlet (61i) through which conditioned air flows into the inward passage (61) and two first outlets (61o) through which conditioned air flows out from the inward passage (61) to the driver's compartment (DR).

[0133] In the path of movement of the conditioned air, the rear end of the inward passage (61) may be the first inlet (61i), and the front end of the inward passage (61) connected to the three blowers (V1, V2) may be the first outlet (61o).

[0134] The first outlet (61o) can correspond to two first air vents (V1).

[0135] In one inward duct (60), the conditioned air flowing out from the inward passage (61) through the first outlet (61o) is introduced into the driver's compartment (DR) through three blowers (V1, V2).

[0136] The inward duct (60) has dividers (d) that allow the conditioned air introduced into the inward passage (61) through one first inlet (61i) to be divided and moved toward the first outlets (61o).

[0137] The inward duct (60) has partitions (d) that allow the conditioned air introduced into the inward passage (61) through one first inlet (61i) to be divided and moved toward three blowers (V1, V2).

[0138] The partitions (d) allow the conditioned air in the inner passage (61) to be divided into the respective first outlets (61o) and to flow out from the inner passage (61).

[0139] The conditioned air is divided by the partitions (d) within the inner passage (61) and then flows into the driver's compartment (DR) through the first air vents (V1) and the second air vents (V2).

[0140] Considering the size and spatial structure of the driver's cabin (DR), there may be two or more first outlets (61o) and one or more screens (d).

[0141] A branch port (63) is formed in the inward duct (60) to send conditioned air to the outward duct (70).

[0142] The branch hole (63) is located on the upper surface area of ​​the inward duct (60) and is formed to open upward.

[0143] The conditioned air in the inward passage (61) is partly branched and diverged into the outward duct (70) through the branch port (63).

[0144] In order to secure the airflow of the conditioned air branched from the inward passage (61) and directed to the outward duct (70), it is preferable to form the branch port (63) behind the partitions (d).

[0145] As shown in the cutaway perspective view of Fig. 10, the outward duct (70) forms an outward passage (71) for guiding the conditioned air to the outside of the cabin (40).

[0146] The outward passage (71) is connected to the inward passage (61) through a branch port (63).

[0147] The outward duct (70) has a second inlet (71i) through which conditioned air flows into the outward passage (71) and a second outlet (71o) through which conditioned air flows out from the outward passage (71) to the outside of the cabin (40).

[0148] In the path of movement of the conditioned air, the front end of the outward passage (71) is the second inlet (61i), and the rear end is the second outlet (61o).

[0149] The outward duct (70) is installed to guide the conditioned air from the inward duct (60) to the outside of the cabin (40) through the branch port (63).

[0150] As shown in Fig. 11, the second inlet (71i) of the outward duct (70) can coincide with the branch outlet (63) of the inward duct (60).

[0151] The outward duct (70) and the inward duct (60) can be mutually connected so that the second inlet (71i) and the branch outlet (63) are aligned.

[0152] The second outlet (71o) is formed so that the conditioned air flows out toward the rear of the cabin (40).

[0153] The conditioned air supplied to the worker outside the cabin (40) through the outward duct (70) moves forward in the inward passage (60) and then moves in the direction from the second inlet (71i) to the second outlet (71o) in the outward passage (70).

[0154] In this embodiment, the second outlet (71o) is located at the rear of the second inlet (71i), so the conditioned air moves rearward in the outward passage (70) and then flows out from the outward passage (70).

[0155] The second outlet (70o) can be positioned at a height at which the head of the worker (WM) operating the work machine (WA) is positioned when the worker (WM) sits on the work seat (WS).

[0156] The stopper (81) is provided as an opening / closing member for opening / closing the external passage (71).

[0157] The worker (WM) can close the second outlet (71o), which is the rear end of the outward passage (71), by closing the stopper (81) as in (a) of FIG. 4 and FIG. 12, or open the second outlet (71o) by opening the stopper (81) as in (b) of FIG. 12 and FIG. 13.

[0158] When the plug (81) is closed, the conditioned air from the air conditioner (50) flows only into the driver's compartment (DR) through the inner passage (61).

[0159] When the plug (81) is opened, some of the conditioned air from the air conditioner (50) flows into the driver's cabin (DR) through the inward passage (61), and some flows into the outward passage (71) and is supplied to the worker outside.

[0160] When the driver (DM) opens the plug (81) while operating the controller (CD) to close the first air vent (V1) and the second air vent (V2), all of the conditioned air coming from the air conditioner (50) moves to the outward passage (71) through the branch port (63) of the inward duct (60) and is then supplied to the worker (WM) outside the cabin (40) through the second outlet (71o).

[0161] The plug (81) is sufficient as long as it can perform the function of an opening / closing member that opens / closes the second outlet (71o), so its shape, installation location, and fixing structure when closed can be considered in various ways.

[0162] Additional Information

[0163] 1. Air conditioner related

[0164] It may be desirable for the inward duct (60) and the outward duct (70) to be implemented so as to guide the movement of conditioned air generated by the same air conditioner (50). However, as shown in the reference drawing of Fig. 14, the inward duct air conditioner (50I) and the outward duct air conditioner (50O) may be separately provided in the agricultural tractor (AT).

[0165] The air conditioner (50I) for the inward duct is implemented to send conditioned air to the driver's cabin (DR) through the inward duct (60), and the air conditioner (50O) for the outward duct is implemented to send conditioned air to the worker (WM) outside the agricultural tractor (AT) through the outward duct (70).

[0166] In the agricultural tractor (AT) of Fig. 14, the driver (DM) can operate the air conditioner (50O) for the external duct only when necessary.

[0167] 2. Relationship between inward and outward ducts

[0168] Even if the conditioned air generated from the same air conditioner (50) is implemented so that it can be supplied to both the inward duct (60) and the outward duct (70), it is not necessarily necessary to configure the conditioned air to move to the outward duct (70) via the inward duct (60).

[0169] For example, it is entirely possible to implement the conditioned air so that it branches from the common duct into an inward duct (60) and an outward duct (70).

[0170] By applying a control valve between the common duct, the inward duct (60) and the outward duct (70), the air volume of the conditioned air supplied to the inward duct (60) and the outward duct (70) can be controlled.

[0171] The control valve may be operated to selectively supply the regulated air to either the inward duct (60) or the outward duct (70).

[0172] 3. Cabin related

[0173] Even if a cabin (40) is not installed, the air conditioning system (50) can be applied so that the conditioned air generated through the air conditioner (50) can be supplied to the worker (WM) located at the rear of the driver's seat (DS). That is, the present invention can be satisfied if the conditioned air can be supplied to the worker (WM) performing work at the rear of the driver's seat (DS), regardless of whether a cabin (40) is installed.

[0174] 4. Regarding the location and direction of the supply of conditioned air

[0175] The above descriptions are about an example in which the conditioned air is supplied from the rear of the cabin (40) toward the rear by assuming that there is a worker (WM) at the rear of the cabin (40) in consideration of the backhoe operation.

[0176] Although it may be desirable to consider backhoe operation, the location or direction of the supply of conditioned air need not be limited to that.

[0177] If there are frequent cases where the operator (WM) is positioned at the front, left or right of the agricultural tractor (AT), the conditioned air can be implemented to be supplied to those positions and directions as well.

[0178] 5. H-Back Related

[0179] Referring to the reference drawing of Fig. 15, it can be seen that in agricultural tractors (AT), a system forming at least a part of an air conditioner (50), commonly called HVAC (Heating, Ventilating and Air Conditioning), is located at the lower part near the rear end of the roof (42).

[0180] The HVAC can be installed to be coupled to the loop (42).

[0181] In the embodiment of Fig. 15, the outlet (71o) of the outward duct (70) needs to be positioned further rearward than the HVAC. For the stability of the agricultural tractor (AT), the HVAC is preferably positioned at a height as low as possible from the ground. Therefore, it may be considered more preferable for the relatively light outward duct (70) to be positioned above the HVAC rather than below it. Taking this into account, a design was considered in which the branch outlet (63) is formed in the upper area of ​​the inward duct (60), as in the example of Fig. 9, so that the outward duct (70) is positioned above the HVAC.

[0182] Of course, any positional relationship between the outward duct (70) and the HVAC can be permitted as long as the stability of the agricultural tractor (AT) can be secured.

[0183] 6. Opening and closing of the inner passage

[0184] If the driver (DM) and the worker (WM) are the same, the driver (DM) comes out of the driver's compartment (DR) and moves to a working position outside the cabin (40). At this time, the driver (DM) can manually close the air vents (V1, V2) by operating the controller (CD).

[0185] However, since the number of air vents (V1, V2) is large and manual operation is required, the operation of closing the air vents (V1, V2) can be quite cumbersome.

[0186] Depending on the implementation, a first opening device that can automatically open and close the inward passage (61) in front of the branch port (63) may be added.

[0187] It is sufficient for the first switch to be installed to open or close any point between the point passing the branch port (63) toward the front and the point where the first outlet port (61o) is located.

[0188] The driver can operate the first operating button that can be operated from the driver's compartment (DR) to cause the first switch to open or close the inward passage (61).

[0189] In this regard, the outward passage (71) may also be implemented to open and close automatically. For example, a second switch capable of automatically opening and closing the branch port (63) may be added. The driver can operate the second operating button operable from the driver's compartment (DR) to cause the second switch to open or close the outward passage (71).

[0190] The above-described embodiments merely illustrate preferred examples of the present invention, and it may have various applications. Therefore, the present invention should not be construed as limited to the above-described content. Instead, the scope of the present invention should be construed within the scope of the separately described claims and their equivalents.

Claims

1. A power generator (10) that generates power required for driving and working; A main body (20) driven by power generated from the above power generator (10); A driver's seat (30) where a driver (DM) who performs the driving required for driving the above body (10) can sit; A cabin (40) that is connected to the main body (20) and forms a driver's compartment (DR) in which the driver's seat (30) is placed; An air conditioner (50) that generates temperature-controlled air (hereinafter referred to as “controlled air”) to control the temperature of the above-mentioned driver’s compartment (DR); An inward duct (60) forming an inward passage (61) that guides the conditioned air generated by the air conditioner (50) to the driver's compartment (DR); and An outward duct (70) forming an outward passage (71) that guides the conditioned air generated by the air conditioner (50) to the outside of the cabin (40); Agricultural tractor (AT).

2. In paragraph 1, The above external duct (70) is installed to guide the conditioned air in the above internal duct (60) to the outside of the cabin (40). Agricultural tractor (AT).

3. In paragraph 1, The above external duct (70) is installed to guide the conditioned air to the worker (WM) at the rear of the cabin (40). Agricultural tractor (AT).

4. In paragraph 1, A branch port (63) is formed in the above inward duct (60) to send conditioned air to the above outward duct (70). The above external duct (70) is installed so as to guide the conditioned air coming from the internal duct (60) through the branch port (63) to the outside of the cabin (40). Agricultural tractor (AT).

5. In paragraph 4, The above external duct (70) has an inlet (71i) through which conditioned air flows into the external passage (71) and an outlet (71o) through which conditioned air flows out from the external passage (71) to the outside of the cabin (40). The above inlet (71i) is aligned with the branch port (63), and the above outlet (71o) is formed so that the conditioned air flows out toward the rear of the cabin (40). Agricultural tractor (AT).

6. In paragraph 4, The above inward duct (60) has an inlet (61i) through which conditioned air flows into the inward passage (61) and a plurality of outlets (61o) through which conditioned air flows out from the inward passage (61) to the driver's compartment (DR). The above inward duct (60) has at least one partition (d) that allows the conditioned air introduced into the inward passage (61) through the inlet (61i) to be divided into the plurality of outlets (61o) and to flow out from the inward passage (61). The above branch hole (63) is located behind at least one of the partitions (d). Agricultural tractor (AT).

7. In paragraph 1, Further comprising a switch (80) for opening and closing the above external passage (71); Agricultural tractor (AT).

8. In paragraph 1, Further comprising a switch capable of automatically opening and closing the above-mentioned inward passage (61); Agricultural tractor (AT).

9. A support frame (41) forming a skeleton for forming a driver's compartment (DR); A loop (42) that is connected to the support frame (41) in a structure that is placed on the support frame (41); An inner cover (43) arranged to face the driver's compartment (DR) and forming a ceiling; An inward duct (60) forming an inward passage (61) for guiding air (hereinafter referred to as “conditioned air”), the temperature of which is controlled by an air conditioner (50), to the driver’s compartment (DR); and An outward duct (70) forming an outward passage (71) for guiding the conditioned air generated by the air conditioner (50) to the outside of the cabin (40); The above loop (42) forms a duct room (DC) between the inner cover (43), The above inward duct (60) is placed in the duct room. Cabin (40) of an agricultural tractor (AT).

10. In paragraph 8, A branch port (63) is formed in the above inward duct (60) to send conditioned air to the above outward duct (70). The above external duct (70) is installed so as to guide the conditioned air coming from the internal duct (60) through the branch port (63) to the outside of the cabin (40). Cabin (40) of an agricultural tractor (AT).

11. In paragraph 10, The above external duct (70) has an inlet (71i) through which conditioned air flows into the external passage (71) and an outlet (71o) through which conditioned air flows out from the external passage (71) to the outside of the cabin (40). The above inlet (71i) is aligned with the branch port (63), and the above outlet (71o) is formed so that the conditioned air flows out toward the rear of the cabin (40). Cabin (40) of an agricultural tractor (AT).

12. In paragraph 11, The above branch hole (63) is formed to open upwards. Cabin (40) of an agricultural tractor (AT).

13. In paragraph 9, Further comprising an opening / closing member for opening / closing the above-mentioned external passage (71); Cabin (40) of an agricultural tractor (AT).

14. In paragraph 13, The above inward duct (60) has an inlet (61i) through which conditioned air flows into the inward passage (61) and a plurality of outlets (61o) through which conditioned air flows out from the inward passage (61) to the driver's compartment (DR). The above inward duct (60) has at least one partition (d) that allows the conditioned air introduced into the inward passage (61) through the inlet (61i) to be divided into the plurality of outlets (61o) and to flow out from the inward passage (61). The above branch hole (63) is located behind at least one of the partitions (d). Cabin (40) of an agricultural tractor (AT).

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