JP2019080543A - Combine harvester - Google Patents

Abstract

To provide a combine harvester that can restrain an excessive temperature increase of a purification device for exhaust gas and improve purification efficiency of the purification device.SOLUTION: An exhaust purification device (12) for purifying impurities in exhaust gas discharged from an engine is installed between a threshing device (4) and a grain tank (7) in a left-right direction. A urea purification device (14) for purifying nitrogen oxides is installed in parallel between the exhaust purification device (12) and the grain tank (7). A cooling fan (42) for cooling a condenser comprised in an air conditioning device provided in a steering part (5) is provided in a rear wall of a cabin (40) covering the steering part (5). The urea purification device (14) faces a rear side of the cooling fan (42). An air blowing guide (46) for vertically adjusting an air blowing direction of air discharged from the cooling fan (42) is provided.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a combine equipped with an exhaust gas purification device.

  In the conventional combine, a technique is known in which an exhaust gas purification device is provided in a space formed between the upper right wall of the threshing device and the notch of the left wall of the grain tank. (Patent Document 1)

JP, 2016-185128, A

  However, in the technology of Patent Document 1, since the exhaust gas purification device which is heated to high temperature is mounted in the space between the threshing device and the grain tank, there is a problem that hot air is stagnant around it and the purification efficiency of the exhaust gas purification device is lowered. The

  Then, the subject of this invention is providing the combine which can suppress the excessive temperature rise of the purification apparatus of exhaust gas, and can improve the purification efficiency of a purification apparatus.

  The present invention which solved the above-mentioned subject is as follows.

  That is, according to the first aspect of the present invention, there is provided a pre-removal processing device (3) for harvesting the grain on the front side of the airframe frame (1), and the grain remnant harvested on the rear left side of the removal pre-processing device (3) A threshing device (4) for threshing and sorting is provided, and a control unit (5) on which the operator gets on the rear right side of the pre-removing device (3) is provided, and an engine is provided under the control unit (5) The threshing device (4) and the combine in which an engine room (6) mounted with a gren tank (7) for storing threshed / sorted grains is provided on the rear side of the engine room (6) Between the left and right direction of the glen tank (7), a first purifier (12) for purifying impurities in the exhaust gas discharged from the engine is installed, and the first purifier (12) and the gren tank The second purification unit for purifying nitrogen oxides during (7) (14) are provided side by side, and a cooling fan (42) for cooling a condenser provided in an air conditioner provided in the steering unit (5) is provided on the rear wall of the cabin (40) covering the steering unit (5) An air blowing guide (46) is provided, with the second purification device (14) facing the rear side of the cooling fan (42) and adjusting the air blowing direction of the air exhausted from the cooling fan (42) up and down It is a combine characterized by that.

  The invention according to claim 2 is characterized in that, when the surface temperature of the second purification device (14) becomes equal to or higher than a threshold temperature (T1), the air blowing guide (46) is an upper portion of the second purification device (14). It is a combine according to claim 1 set to the posture which blows air to the neighborhood.

  The invention according to claim 3 sets the air flow guide (46) to the second purification device (14) after setting the air flow guide (46) to a posture for blowing air near the upper portion of the second purification device (14). The combine according to claim 2, wherein the posture is alternately changed from the posture of blowing air to the vicinity of the upper part of b) to the posture of blowing air to the vicinity of the lower part of the second purification device (14).

  According to the first aspect of the present invention, the rear wall of the cabin (40) covering the control unit (5) is provided with a cooling fan (42) for cooling the air conditioner provided in the control unit (5); Since the purification device (14) faces the rear side of the cooling fan (42) and the air blowing guide (46) is provided to adjust the air blowing direction of the air exhausted from the cooling fan (42) up and down, cooling The air from the fan (42) is efficiently supplied to the periphery of the second purification device (14), and the second purification device (14) is prevented from becoming excessively hot, thereby efficiently purifying nitrogen oxides. be able to.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the surface temperature of the second purification device (14) becomes equal to or higher than the threshold temperature (T1), the air blowing guide (46 (4) is blown to the vicinity of the upper part of the second purification device (14), so that the ambient temperature of the second purification device (14) can be rapidly reduced to further efficiently purify nitrogen oxides. it can.

  According to the third aspect of the invention, in addition to the effect of the invention of the second aspect, the second purification device (from the posture of blowing the blower guide (46) to the vicinity of the upper portion of the second purification device (14) Since the posture is alternately changed over the posture in which the air is blown to the vicinity of the lower portion of 14), the retention of the hot air around the second purification device (14) can be suppressed.

It is a top view of a combine. It is a left view of a combine. It is a front view of a purification device. It is a front perspective view of a purification device. It is a rear perspective view of a purification device. It is a front view of a lock member which connects a gren tank and a purifier frame. It is a rear perspective view of a purification device frame. It is a top view of a purification device and a cooling fan. It is a rear view of a purification device and a cooling fan. It is a right view of a purification device and a cooling fan. It is explanatory drawing of the filter body mounted to a radiator cover. It is a rear view of a fuel tank.

  The present invention will be described with reference to the drawings. In addition, when viewed from the operator, the front is referred to as the front, the rear is referred to as the rear, the right hand is referred to as the right, and the left hand is referred to as the left.

  As shown in FIGS. 1 and 2, the general purpose combine is provided with a traveling device 2 consisting of a pair of left and right crawlers traveling on the soil surface below the body frame 1, and harvests the cereals in the field on the front side of the body frame 1. A threshing device 4 is provided, and a threshing device 4 is provided for threshing and sorting the harvested grain on the rear left side of the mowing pretreatment device 3. A pilot boarding is provided on the rear right side of the mowing pretreatment device 3. A control unit 5 is provided.

  Under the control unit 5, an engine room 6 for interiorizing an engine is provided, and on the rear side of the control unit 5, a gren tank 7 for storing threshed and sorted grains is provided. On the rear side, a discharge cylinder 8 for discharging the grains to the outside is provided. The discharge cylinder 8 is formed of a vertical discharge cylinder communicating with the rear lower portion of the grain tank 7 and extending in the vertical direction, and a horizontal discharge cylinder communicating with the upper portion of the vertical discharge cylinder and extending in the front-rear direction. Further, the lower part of the threshing device 4 and the upper part of the gren tank 7 are connected by a grain harvesting device 9 for transporting grains from the grain removing device 4 to the gren tank 7.

  The pre-removal processing apparatus 3 includes a transport device 3A that transports the rice straw to the rear side while standing up the cereals in the field, and a cutting blade device 3B that cuts the stock origin of the cereals transported to the rear lower side of the transport device 3A. It comprises an auger 3C that gathers on the left side the cereals transported to the rear of the transport device 3A, and a feeder house 3D that transports the gathered cereals to the threshing device 4.

  As shown in FIGS. 3 to 5, the threshing drum cover 60 provided on the upper side of the threshing drum of the threshing device 4 is provided with a support shaft 61 provided on the top of the left wall 4A of the threshing device 4 and extending in the front-rear direction. It is rotatably supported. As a result, by rotating the threshing drum cover 60 about the support shaft 61 to form a large space above the threshing drum, maintenance of the threshing drum and the like can be easily performed. Further, a rightward extending extension portion 62 provided at the lower right portion of the threshing drum cover 60 is a threshing device frame extending in the front-rear direction provided at the upper portion of the right wall 4B of the threshing device 4 63 is detachably fixed.

  At the rear of the control unit 5, a pilot seat frame 50 extending in the left-right direction is provided. The left portion of the cockpit frame 50 is connected to an inverted U-shaped left frame 52 provided at an intermediate portion in the left-right direction at the front of the body frame 1 via a connecting member 51 extending in the up-down direction. It is done. Further, the right portion of the cockpit seat frame 50 is an inverted U-shaped right frame 54 provided on the right portion in the left-right direction at the front of the vehicle frame 1 via the connecting member 53 extending in the up-down direction. Is linked to

  An exhaust pipe 10 for exhausting exhaust gas burned by the engine to the outside is connected to an exhaust port of an engine (not shown) installed in the engine room 6.

  A purification device is connected to the exhaust pipe 10. The purification device purifies the nitrogen oxide in the exhaust gas exhausted from the exhaust gas purification device (DPF, “first purification device” in the claims) 12 that purifies impurities in the exhaust gas and the exhaust gas purification device 12 It is formed of a device (SCR, a second purification device in the claims) and the like, and the longitudinal direction of the exhaust purification device 12 and the urea purification device 14 is disposed in the front-rear direction of the airframe. The exhaust gas purification device 12 is internally provided with an oxidation catalyst (DOC) on the upstream side and a particulate filter (DPF) on the downstream side.

  The exhaust port of the engine and the intake port of the exhaust purification device 12 are connected by a flexible exhaust pipe 11, and the exhaust port of the exhaust purification device 12 and the intake port of the urea purification device 14 are by a flexible exhaust pipe 13. A flexible exhaust pipe 15 is connected to the exhaust port of the urea purification device 14 which is connected. In addition, an injection device 17 which is a valve for injecting urea water to the urea purification device 14 via the exhaust pipe 13 is connected to the rear of the exhaust pipe 13, and the injection device 17 via a flexible connection pipe. A supply device (not shown), which is a pump for pumping urea water, is connected, and a urea water tank (not shown) for storing urea water is connected to the supply device via a flexible connection pipe.

  The exhaust pipe 15 extends upward from the exhaust port of the urea purification device 14 and reaches the vicinity of the upper inclined wall 32 of the notch S formed in the left wall 7A of the grain tank 7, and then to the left After being bent approximately 90 degrees toward the left and extending the front side of the grain-raising device 9 toward the left side, it is bent approximately 90 degrees toward the rear side and extends through the left side of the grain-raising device 9 toward the rear side It exists. Thus, the threshing drum cover 60 can be easily rotated about the support shaft 61. Moreover, the exhaust pipe 15 is detachably fixed to the grain raising apparatus 9 via the stay (illustration omitted) provided in the front part of the grain raising apparatus 9. As shown in FIG. Thus, the exhaust pipe 15 can be easily maintained in a predetermined posture.

  The exhaust purification device 12 and the urea purification device 14 are fixed to the purification device frame 20 via the mounting plate 16. In front view, the exhaust gas purification device 12 is fixed to the left portion of the mounting plate 16, and the urea purification device 14 is fixed to the right portion of the mounting plate 16.

  As shown in FIGS. 6 and 7, the purification device frame 20 extends in the left-right direction provided on the rear side of the first left-right frame 21 extending in the left-right direction and the first left-right frame 21. The second left and right frame 22, the third left and right frame 23 extending in the left-right direction provided on the rear side of the second left and right frame 22, the first front and rear frame 24 extending in the front-rear direction, It is formed of a second front and rear frame 25 provided on the right side of the front and rear frame 24 and extending in the front and rear direction. Further, the rear surface of the right portion of the first left and right frame 21 and the left surface of the front of the second front and rear frame 25 are connected by a plate 21 B, and the front surface of the middle portion of the second left and right frame 22 and the left surface of the rear of the second front and rear frame 25 Are connected by a plate 22A. In the present specification, the first left and right frames 21, the second left and right frames 22, and the third left and right frames 23 are collectively referred to as the left and right frames A, and the first front and rear frames 24 and the second front and rear frames 25 are generically referred to. And say that it is frame B before and after.

  The rear surface of the left portion of the first left and right frame 21, the left surface of the left portion of the second left and right frame 22, and the left surface of the left portion of the third left and right frame 23 are connected to the first front and rear frame 24 respectively. The rear surface of the right portion of the first left and right frame 21 and the front surface of the middle portion of the second left and right frame 22 are connected to the second front and rear frame 25 respectively. Further, the lower surfaces of the first left and right frames 21, the lower surfaces of the second left and right frames 22, the lower surfaces of the third left and right frames 23, the lower surfaces of the first front and rear frames 24, and the lower surfaces of the second front and rear frames 25 It is provided at the same position. As a result, the downward protrusion of the purification device frame 20 provided in the engine room 6 can be reduced, and a large space can be formed in the engine room 6.

  The rear surface of the left portion of the second left and right frame 22 and the front surface of the left portion of the third left and right frame 23 are connected to a first reinforcing frame 26 extending in the front-rear direction. The rear surface and the front surface of the right portion of the third left and right frame 23 are connected to a second reinforcing frame 27 extending in the front-rear direction. The lower surfaces of the second left and right frames 22, the lower surfaces of the third left and right frames 23, the lower surface of the first reinforcing frame 26, and the lower surface of the second reinforcing frame 27 are provided at the same position in the vertical direction. As a result, deformation of the purification device frame 20 can be prevented, and the downward protrusion of the purification device frame 20 provided in the engine compartment 6 can be made smaller, and a larger space can be formed in the engine compartment 6.

  In the upper surface of the first reinforcing frame 26 and the upper surface of the second reinforcing frame 27, an opening used when the mounting plate 16 is fixed is formed. The rear surfaces of the second right and left frames 22 and the front surfaces of the third left and right frames 23 located on the extension of the second front and rear frames 25 are connected to a third reinforcing frame 28 extending in the front and rear direction. Thereby, the deformation of the purification device frame 20 can be further prevented.

  On the front surface of the first left and right frame 21, a pair of left and right front stays 21 </ b> A connecting the purification device frame 20 to the upper surface of the pilot seat frame 50 is provided. A left stay 24A connecting the purifier frame 20 to the top surface of the threshing device frame 60 is provided on the left surface of the rear of the first front and rear frame 24. Thus, the purifier frame 20 can be firmly connected and fixed to the cockpit frame 50 and the threshing device frame 60.

  A portion of the lower surface of the first left and right frame 21 in the vicinity of the second front and rear frame 25 is connected to the body frame 1 via the first connecting member 55 extending in the up and down direction. The vicinity of the 3 reinforcement frame 28 is connected to the right wall 4B of the threshing device 4 via the second connection member 56 provided on the left downward slope, and the middle portion in the front and rear direction on the lower surface of the left stay 24A is in the vertical direction Is connected to the airframe 1 via a third connecting member 57 extending in the direction of. Thereby, the purifier frame 20 can be more firmly connected to the cockpit frame 50 and the threshing device frame 60, and the deformation of the purifier frame 20 can be further prevented.

  A notch S having an opening on the front side and the left side is formed in the left wall 7A of the glen tank 7 facing the urea purification device 14. Thus, the exhaust gas purification device 12 and the urea purification device 14 can be provided side by side in the left-right direction and provided between the threshing device 4 and the gren tank 7.

  In the front portion of the left wall 7A of the glen tank 7 located on the front side of the grain growing device 9, the upper side vertical wall 31 and the upper side slope inclined downward to the right from the lower end of the upper side vertical wall 31 in front view The wall 32, an intermediate vertical wall (“vertical wall” in the claims) 33 extending downward from the lower end of the upper inclined wall 32, and an inclination from the lower end of the intermediate vertical wall 33 to the left A lower inclined wall 34 and a lower vertical wall 35 extending downward from the lower end of the lower inclined wall 34 are formed. The notch S is a space defined by the upper inclined wall 32, the middle vertical wall 33, and the lower inclined wall 34.

  The upper inclined wall 32 is formed at a downward inclination angle of about 45 degrees toward the right with respect to the horizontal surface, and the middle vertical wall 33 is an upper side of a transport spiral extending in the front-rear direction for transporting grains to the discharge cylinder 8 The lower inclined wall 34 is formed to have a downward inclination angle of approximately 30 degrees toward the left side with respect to the horizontal plane. Thereby, the grain conveyed to grain tank 7 by grain growing device 9 can be efficiently leaked to a conveyance spiral.

  The glen tank 7 is an open state in which the front of the gren tank 7 is moved to the right of the fuselage frame 1 with a spindle provided on the rear side of the gren tank 7 as a center, and It can be pivoted to the storage state moved to the upper side of 1. Thus, the filter replacement operation and the like of the exhaust gas purification device 12 can be easily performed.

  The stored gren tank 7 is engaged with a longitudinally extending pin 29 provided on the right front of the purifier frame 20 via a lock device 70. Thereby, it can prevent that the grain tank 7 moves to an open state at the time of a harvesting operation.

  The lock device 70 includes an operation lever 71 provided on the front side of the support member 75 provided on the front of the middle vertical portion 33 of the grain tank 7, a hook member 72 provided on the rear side of the support member 75, and It is comprised from the round rod-shaped connecting member 73 extended in the front-back direction which connects the left part of the lever 71, and the right part of the hook member 72. As shown in FIG.

  The right portion of the operation lever 71 extends on the front side of the front wall 7C of the glen tank 7, and the connecting member 73 is rotatably fitted in a longitudinally extending pipe 76 provided on the support member 75, The left end of the hook member 72 is formed in a bifurcated shape. As a result, the operating lever 71 can be operated from the space formed between the control unit 5 and the gren tank 7, and the gren tank 7 can be easily engaged with the purifier frame 20 via the locking device 70. In addition, since the purifier frame 20 is connected to the airframe frame 1 and the threshing device 4, the hook member 72 and the pin 29 can be prevented from being disengaged.

  As shown in FIGS. 8 to 10, on the right side of the rear wall of the cabin 40 of the steering unit 5, a precleaner 41 for removing impurities in the air supplied to the engine is provided, and the width of the rear wall of the cabin 40 At the center of the direction, a cooling fan 42 for exhausting air around the condenser for cooling the cooling medium warmed by the air conditioning equipment provided in the cabin 40 is provided rearward.

  In plan view, the exhaust purification device 12 whose surface temperature rises to about 550 ° C. when driven is provided on the left side of the cooling fan 42 and the urea purification device 14 whose surface temperature rises about 350 ° C. when driven is a cooling fan The right side of the urea purification device 14 is provided on the left side of the right outer peripheral portion of the cooling fan 42. In rear view, the exhaust purification device 12 is provided on the left side of the cooling fan 42, the urea purification device 14 is provided on the rear side of the cooling fan 42, and the upper portion of the urea purification device 14 is the cooling fan 42. It is provided above the lower outer peripheral part. As a result, the air exhausted from the cooling fan 42 can be in contact with the upper right portion of the urea purification device 14 to prevent the temperature of the urea purification device 14 from becoming excessively high, thereby efficiently purifying nitrogen oxides. . On the other hand, since the air exhausted from the cooling fan 42 does not directly contact the exhaust gas purification device 12, the exhaust gas purification device 12 can efficiently purify the impurities in the exhaust gas without being cooled.

  A cover 45 is provided above the exhaust gas purification device 12 and the urea purification device 14. In plan view, the exhaust gas purification device 12 is provided below the cover 45, the urea purification device 14 is provided at a position shifted to the right from the cover 45, and the left portion of the urea purification device 14 is the cover 45 It is provided on the left side of the right end. This can prevent dust such as waste from coming into contact with the exhaust gas purification device 12.

  In the rear view, the cover 45 is formed in a substantially mountain shape, the left part 45B of the cover 45 is formed in a gentle downward slope toward the left side, and the right part 45C of the cover 45 is formed from the left part toward the right It is also formed with a steep downward slope. This can prevent dust from depositing on the cover 45. The dust that has dropped from the right portion 45C of the cover 45 into the urea purification device 14 is blown away by the air exhausted from the cooling fan 42 and removed.

  In the left side view, the front portion 45A of the cover 45 is formed to have a steep downward slope toward the front side, and the front end portion of the cover 45 faces the vertical center of the cooling fan 42. Thereby, part of the air exhausted from the cooling fan 42 can be guided to the upper side of the cover 45, dust can be efficiently prevented from being deposited on the cover 45, and the cover 45 It is possible to prevent an excessively high temperature.

  A plate-shaped blower guide 46 extending rearward is provided on a horizontally extending support shaft provided below the cooling fan 42. The rear end portion of the air guide 46 is configured to move up and down according to the temperature of the exhaust gas purification device 12 and the urea purification device 14. Thus, an appropriate amount of air exhausted from the cooling fan 42 can be blown toward the exhaust purification device 12 and the urea purification device 14 in accordance with the temperatures of the exhaust purification device 12 and the urea purification device 14. The temperature control of the purifier 12 and the urea purifier 14 can be performed efficiently.

  As described above, the surface temperature of the urea purification device 14 is approximately 350 ° C. when the engine is in operation. When the surface temperature rises to the first threshold temperature T1 (for example, 400 ° C. or higher), the cooling fan 42 of the condenser is driven regardless of the operating condition of the air conditioning equipment to reduce the surface temperature of the urea purification device 14 The ambient temperature of the urea purification device 14 is lowered.

  In addition, when the air conditioning equipment is operating, in consideration of an increase in the temperature of the air supplied from the cooling fan 42 to the periphery of the urea purification device 14, the second temperature is lower than the first threshold temperature T1 described above. The cooling fan 42 can also be operated at a threshold temperature T2 of two (for example, 370 ° C.).

  In addition, when the cooling fan 42 is already operating when the surface temperature of the urea purification device 14 reaches the second threshold temperature T2, the rotational speed of the cooling fan 42 can be increased.

  As described above, when the cooling fan 42 blows air around the urea purification device 14, the wind direction of the blowing guide 46 is first blown toward the height position of the cover 45 and then blown to move up and down. The urea purification device 14 can be cooled effectively.

  In addition, when the air conditioner is not operating, the cooling fan 42 is driven at fixed time intervals to blow air toward the periphery of the cover 45. When the air conditioner is operating, the wind direction of the air guide 46 is directed toward the height of the cover 45 at constant time intervals, and the rotational speed of the cooling fan 42 is increased.

  As shown in FIG. 11, on the right side which is the outer side of the radiator cover 47 of the engine compartment 6, a filter body 48 formed of a punching metal, a net or the like is detachably mounted. As a result, the filter body 48 to which dust such as dust has adhered can be removed from the radiator cover 47 and cleaned easily.

  The filter body 48 can be detachably attached to the radiator cover 47 by fastening means such as a bolt or magnetic means such as a magnet, and the four corners of the filter body 48 are provided with handles 48A used at the time of attachment and detachment. Is preferred. In addition, although the attachment method of the filter body 48 located in the middle of an up-down direction is illustrated for convenience in FIG. 11, the filter body 48 located in the upper side and the filter body 48 located in the lower side are the same.

  As shown in FIG. 5, in the body frame 1, four front and rear frames 67A to 67D extending in the front and rear direction at predetermined intervals in the left and right direction are juxtaposed. Further, rear end portions of the front and rear frames 67A to 67D are connected by a left and right frame 68 extending in the left and right direction. More specifically, the left ends of the left and right frames 68 are fixed to the right side of the front and rear frames 67A, the right ends of the left and right frames 68 are fixed to the left side of the front and rear frames 67D, and the left side of the lower surface of the left and right frames 68 is The right side portion of the lower surface of the left and right frames 68 is fixed to the upper surface of the front and rear frames 67C.

  As shown in FIG. 12, a fuel tank 65 is provided at the rear lower portion of the threshing device 4. In plan view, the fuel tank 65 is formed in a substantially rectangular shape having long sides in the left-right direction, and the expansion portion 65A that expands downward toward the lower wall on the left side of the front and rear frame 67B in the fuel tank 65 Is formed. In addition, the expansion portion 65A is separated from the fuel tank 65 by an oil supply port 66A for connecting a hose for returning unused fuel from the engine to the fuel tank 65 sequentially from the left side at predetermined intervals in the left-right direction. A drain port 66B for draining the fuel and an oil outlet 66C for connecting a hose for supplying fuel from the fuel tank 65 to the engine are provided. As a result, a large amount of fuel can be stored in the fuel tank 65, and fuel can be reliably supplied from the fuel tank 65 to the engine even when the amount of fuel is low.

  A hose for returning unused fuel and a hose for supplying fuel are preferably provided below the auger transmission shaft for transmitting the rotation of the engine to the discharge spiral of the discharge cylinder 8. This can prevent the worker from accidentally stepping on the hose at the time of maintenance.

  The hoses for returning unused fuel and the hoses for supplying fuel are separated from the connection pipes for connecting the injection device 17 of the purification device and the supply device, and the connection pipes for connecting the supply device and the urea water tank with a predetermined distance. It is preferable to provide. This prevents the hose from being heated, prevents the temperature rise of the fuel flowing in the hose, and can maintain the high combustion efficiency of the engine.

  It is preferable to provide a receiving box on the lower side of the connecting portion connecting the lower portion of the gren tank 7 and the lower portion of the discharge cylinder 8. Thereby, when rotating the grain tank 7 from an accommodation state to an open state, the grain which leaks from the connection part outside can be collect | recovered.

  When the power steering lever for vertically moving the pre-removing processing device 3 provided on the right front of the control unit 5 fails, it is preferable to stop the exclusive control. Thus, the pre-removing apparatus 3 can be moved in the vertical direction by the lift switch provided on the main shift lever.

DESCRIPTION OF SYMBOLS 1 Aircraft body frame 3 Harvesting pre-processing device 4 Threshing device 5 Control part 6 Engine room 7 Glen tank 12 Exhaust purification device (1st purification device)
14 Urea purification device (second purification device)
40 cabin 42 cooling fan 46 air guide T1 threshold temperature

Claims (3)

A threshing device (4) is provided on the front side of the airframe frame (1) for harvesting grain processing equipment (3), and for threshing and sorting the grain crop harvested on the rear left side of the mowing pretreatment processing device (3) ), The control unit (5) on which the operator gets on the right of the rear of the reprocessing device (3), and the engine room (6) for mounting the engine under the control unit (5). In a combine having a gren tank (7) for storing threshed and sorted kernels behind the engine room (6),
Between the threshing device (4) and the grain tank (7) in the lateral direction, an exhaust gas purification device (12) for purifying impurities in the exhaust gas discharged from the engine is installed, and this exhaust gas purification device 12) and a gren tank (7), a urea purification device (14) for purifying nitrogen oxides is juxtaposed, and the steering portion (5) is disposed on the rear wall of the cabin (40) covering the steering portion (5). A cooling fan (42) for cooling a condenser provided in the air conditioning system provided in), the urea purification device (14) facing the rear side of the cooling fan (42),
There is provided a blower guide (46) for adjusting the blowing direction of the air exhausted from the cooling fan (42) up and down.   When the surface temperature of the urea purification device (14) becomes equal to or higher than a threshold temperature (T1), the air blowing guide (46) is set to be in a posture for blowing air near the upper portion of the urea purification device (14). Combine according to 1.   After setting the air blowing guide (46) to a position for blowing air near the upper portion of the urea purification device (14), the air from the posture for blowing the air blowing guide (46) to the vicinity of the top of the urea purification device (14) The combine according to claim 2, wherein the posture is alternately changed over the posture for blowing air to the vicinity of the lower portion of the purification device (14).

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