JP4146602B2 - Air conditioner for self-propelled control machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of an air conditioner (air conditioner) in a traveling vehicle with a cabin.
[0002]
[Prior art]
2. Description of the Related Art A traveling vehicle with a cabin provided with an air conditioning device has been known. The indoor unit of the air conditioner has been arranged on the lower surface of the cabin roof above the driver's seat or on the left and right sides of the driving operation panel in front of the driver's seat.
[0003]
[Problems to be solved by the invention]
In the layout as described above, it is necessary to narrow the space in the driver's cab, extend the overall length of the vehicle, or increase the overall height in order to arrange the indoor units. Some work vehicles such as farm work require restrictions on the overall height and the total length due to the necessity of work, and a work vehicle that can realize a comfortable air-conditioning environment without sacrificing habitability has been desired.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
[0005]
In Claim 1, the indoor unit (20) of an air conditioner (9) is arrange | positioned in the cabin (10) arrange | positioned at a self-propelled control machine (1), and a windshield ( 48) In the configuration in which the defroster (40) is connected, a partition plate (44) that divides the inside of the defroster case (43) into substantially right and left is provided inside the defroster case (43) constituting the defroster (40). The defroster case (43) is divided into a left defroster chamber (43L) and a right defroster chamber (43R) by the partition plate (44) , and the defroster case (43) and the indoor unit (20) Are connected to each other by a single duct (42), a discharge port (42a) is provided at the upper end of the single duct (42), and air from the duct (42) is caused to flow into the discharge port (42a). Inlet for ( Open 5R · 45L) to the left and right, the partition plate (44) left defroster chamber divided by (43L) and right defroster chamber (43R) for each, the left and right suction port a (45R · 45L), respectively And opened .
[0006]
The air conditioning apparatus for a self-propelled control machine according to claim 1, wherein the defroster (40) extends in the left-right direction inside the cabin (10), and the front end of the defroster (40). And a synthetic resin adhesive (52) between the self-propelled control machine windshield (48), and the defroster (40) and windshield (48) are connected by the adhesive (52). The defroster (40) also serves as the front frame of the cabin (10) .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, the Example applied to the self-propelled control machine as a traveling vehicle equipped with the air conditioner of this invention is described.
[0008]
1 is a side view of a traveling vehicle, FIG. 2 is a plan view of the traveling vehicle, FIG. 3 is a plan view showing an air conditioner and a defroster, FIG. 4 is a side view showing the air conditioner and the defroster, and FIG. 6 is a schematic view of the air conditioner device, FIG. 7 is a cross-sectional view taken along the arrow A showing a defroster case, and FIG. 8 is a side cross-sectional view showing the defroster case.
[0009]
A self-propelled control machine (speed sprayer) is configured by mounting a spray working machine on a traveling machine body. As shown in FIGS. 1 and 2, a driving operation column 2 and a driver's seat 3 are disposed in the front part of a self-propelled control machine (traveling vehicle) 1 and these are covered with a cabin 10 and the interior thereof. An operator cab 16 is configured. A drug tank 4 is placed in the center of the traveling vehicle, and a drug supplement lid 4a is disposed on the upper center of the drug tank 4. A jetting part 5 is provided behind the medicine tank 4, and a plurality of nozzles 5a, 5a,... A blower 6 for scattering the discharged medicine is provided at the rear part of the ejection part 5, and front wheels 7, 7 and rear wheels 8, 8 are arranged at the lower part of the traveling vehicle.
[0010]
An engine 11 is disposed between the medicine tank 4 and the ejection part 5, and a radiator 12 is disposed on the left side of the engine 11. A part of the cooling water circulating between the radiator 12 and the engine 11 is sent to the indoor unit 20 of the air conditioner 9 described later and used for heating. A compressor 13 is disposed on the right side of the engine 11, and a fan 14 is disposed on the right side. The compressor 13 and the fan 14 constitute an air conditioning device 9 and are used for cooling the indoor unit 20.
[0011]
Hereafter, the arrangement configuration of the air conditioner 9 will be described. In order for the traveling vehicle 1 to favorably travel on uneven terrain, the front overhang portion 15 on the lower surface of the cab 16 in front of the front wheels 7 and 7 in the side view is inclined to the front height and the rear to reduce the approach angle (angle). ) Α is secured, and a space is formed below the driver's seat according to this approach angle α. The indoor unit 20 of the air conditioner 9 is disposed in a space below the feet of the cab 16 of the front overhang portion 15, and the position thereof is below the cab bottom plate 17 where the feet of the worker sitting on the driver's seat 3 are in contact. It is said. Therefore, the indoor unit 20 can be disposed without increasing the overall height of the traveling vehicle 1 while maintaining the indoor height of the cab 16 substantially the same as the conventional one.
[0012]
The shape of the indoor unit 20 in a side view substantially matches the shape of the foot lower outer wall 60 of the front overhang portion 15 and is disposed in the space below the foot of the cab 16 without causing a dead space.
[0013]
As shown in FIGS. 2 and 3, the indoor unit 20 is arranged on the left side of the driver's seat 3 in a plan view, and suction ports 21, 21... Are opened on the upper surface of the indoor unit 20. . A side door 19 is configured to be openable and closable on the right side of the driver's seat 16, and an operator can get on and off by opening and closing the side door 19. The holes 21a and 17a are provided in the cab bottom plate 17 in the overlapping portion in plan view above the suction port 21 so that the air inside the cab 16 can be sucked into the indoor unit 20. Further, the drilling hole 17a is covered with a net 18, and mud, dust, etc. adhering to the worker's shoes or the like are prevented from being sucked into the indoor unit 20.
[0014]
As shown in FIGS. 3 and 4, a shift operation column 22 that is a shift operation device is disposed above the indoor unit 20. The shift column 22 is provided with a shift lever for switching operation between the main shift and the sub shift. The lower part of the transmission column 22 is not sealed, and is configured to allow air inside the cab 16 to flow into the suction ports 21 and 21 provided on the left side of the indoor unit 20.
[0015]
The air conditioning mechanism of the air conditioner 20 will be described. First, the cooling will be described. As shown in FIG. 6, a refrigerant gas pipe 23 for circulating a refrigerant gas such as fluorocarbons is provided inside the traveling vehicle 1, and the refrigerant gas pipe 23 includes a compressor 13, a condenser 25, an expansion valve 27, and evaporation. A device 26 is connected. The refrigerant gas is compressed by the compressor 13 to become a high-temperature and high-pressure gas, condensed by the condenser 25 and liquefied, cooled by the fan 14, and radiated to the outside air. The liquefied refrigerant gas flows into the expansion valve 27 disposed inside the indoor unit 20. The expansion valve 27 is a kind of throttle valve, and the liquefied refrigerant gas has its flow rate restricted to the evaporator 26 and is blown out to the evaporator 26 in a low temperature / low pressure fog state. The refrigerant gas evaporates in the evaporator 26 because it is in a low pressure state. During this evaporation, the refrigerant gas is vaporized by taking the heat of vaporization from the air passing through the outside of the evaporator 26, and the air is cooled. Then, the vaporized refrigerant gas returns to the compressor 13 again through the refrigerant gas pipe 23.
[0016]
The indoor unit 20 includes a sirocco fan 29 that blows air toward the duct 30 connected to the front end of the indoor unit 20. The air conveyed by the sirocco fan 29 is cooled as described above by contacting the evaporator 26 and flows into the duct 30 as cold air. As will be described later, when the flow valve 31 is closed and hot water does not flow into the indoor unit 20, the cooled air passes through the duct 30 and the cab 16 is cooled.
[0017]
When the air inside the cab 16 is dried (when the inner surface of the windshield 48 is clouded), the cooling operation by the above mechanism is always performed. For this reason, also when heating the inside of the cab 16, as will be described later, warm air is created by heating the air once cooled inside the indoor unit 20, and always dry air is provided inside the cab 16. It is trying to.
[0018]
Next, heating will be described. A cooling water pipe 32 for circulating the cooling water of the engine 11 is provided inside the traveling vehicle 1 and connects the engine 11 and the radiator 12. The cooling water pipe 32 is provided with a branch when it passes through the engine 11, and constitutes a hot water pipe 33 that passes through the indoor unit 20 and returns to the engine 11 again. With the above configuration, a part of the cooling water flows directly into the indoor unit 20 without going to the radiator 12. Further, a flow valve 31 is provided on the path of the hot water pipe 33 in the vicinity of the indoor unit 20 so that the amount of cooling water flowing into the hot water pipe 33 can be adjusted. The adjustment of the flow valve 31 will be described later.
[0019]
The cooling water heated by the engine 11 flows into the heater 34 disposed inside the indoor unit 20 through the hot water pipe 33. In the heater 34, the cooling water dissipates heat and heats the surrounding air. That is, as described above, the cool air that is blown by the fan 29 and then cooled by the cooler 28 is heated in contact with the heater 34. When the compressor 13 is stopped and cooling is not performed, or when the amount of cooling water passing through the hot water pipe 33 is set to a certain amount or more by operating the flow valve 31, the hot air is discharged to the duct 30. It is.
[0020]
Note that the cooling water from the engine 11 passes through the hot water pipe 33 preferentially, so that the rapid start-up of the heating is ensured.
[0021]
The defroster 40 will be described. First, the ventilation path from the indoor unit 20 to the defroster 40 will be described. As shown in FIG. 3 and FIG. 4, a duct 30, an air case 35, and a duct 42 are sequentially communicated between the indoor unit 20 and the defroster 40, and air from the indoor unit 20 (cold air, hot air, or cold operation) ) Passes through the duct 30 and flows into the air case 35. An indoor unit panel 36 is provided at the rear end of the air case 35, air conditioning outlets 37 and 37 are formed in the lower part, the air conditioner adjustment lever 38 on the upper left side, and the air conditioning on the upper right side. A wind direction adjusting lever 39 is provided. In addition, a large number of partition plates 41 are arranged at the air conditioning outlets 37 and 37, and by changing the direction of the partition plates 41, 41. The direction can be changed.
[0022]
Further, it is possible to change the flow rate of the cooling water flowing through the hot water pipe 33 by operating the flow rate valve 31 by means of the air conditioner adjustment lever 38. Therefore, the air blow from the indoor unit 20 can be freely changed from the cold air to the hot air by rotating the air conditioner adjustment lever 38 to the left and right.
[0023]
Of the airflow that has flowed into the air case 35, a part of the airflow passes through the duct 42 and is sent to the defroster 40, and the remaining airflow is exhausted from the air conditioning discharge ports 37 and 37. This air flow adjustment is performed by operating the air-conditioning air direction adjusting lever 39.
[0024]
As shown in FIG. 5, the lower surface of the air case 35 is perforated so that the upper end portion of the duct 30 having the discharge port 30a opened at the upper end is penetrated. Similarly, the front surface of the air case 35 is perforated and the rear end. The rear end portion of the duct 42 that opens the suction port 42b is inserted. The air-conditioning air direction adjusting lever 39 is pivotally supported by a rotation shaft 50 erected in the direction of arrow B in FIG. Further, a partition plate 51 is fixed to the air-conditioning wind direction adjusting lever 39, and is rotated back and forth in accordance with the left-right rotation of the air-conditioning air direction adjusting lever 39.
[0025]
The inside of the air case 35 is divided by the partition plate 51, the front part in the air case 35 constitutes a blower chamber 35F to the defroster 40, and the rear part constitutes a blower chamber 35B to the air conditioning discharge ports 37 and 37. . Moreover, the opening location of the discharge port 30a of the duct 30 is also divided. The volume of the air blowing chambers 35F and 35B is changed by the forward and backward rotation of the partition plate 51, and at the same time, the dividing position of the opening portion of the discharge port 30a is also changed, and the ratio of the air flow rate from the indoor unit 20 to the air blowing chambers 35F and 35B is changed. Is changing. That is, the pilot increases the air flow rate from the indoor unit 20 to the air blowing chamber 35B by turning the air-conditioning air direction adjusting lever 39 to the left, and the air flow rate to the air blowing chamber 35F by turning to the right. It can be increased.
[0026]
Next, a method for leveling the air flow in the defroster 40 will be described. As shown in FIGS. 7 and 8, the defroster 40 includes a defroster case 43 and a partition plate 44, and the interior of the defroster case 43 is divided into substantially right and left by the partition plate 44. The left and right spaces constitute a left defroster chamber 43L and a right defroster chamber 43R. The lower end of the defroster case 43 is connected to a discharge port 42a provided at the upper end of the duct 42. In the discharge port 42a, suction ports 45L and 45R for allowing the air blown from the duct 42 to flow are opened to the left and right. ing. The suction port 45L communicates with the left defroster chamber 43L, and the suction port 45R similarly communicates with the right defroster chamber 43R. A blowout port 46 is formed at the upper end of the defroster case 43. The defroster case 43 is covered with a heat insulating sheet 47 made of synthetic resin.
[0027]
A synthetic resin adhesive 52 is sandwiched between the front end of the defroster 40 and the windshield 48 of the traveling vehicle 1, and the defroster 40 and the windshield 48 are connected by the adhesive 52. In addition, as shown in FIG. 2, the defroster 40 extends in the left-right direction inside the cabin 10 and constitutes a front frame of the cabin 10. In FIG. 7, the windshield 48 and the adhesive 52 are not shown.
[0028]
The partition plate 44 includes a joint portion 44a having a rhomboid parallelogram in a side view and a vertically long rectangle in a front view, and a plate portion 44b having a vertically long parallelogram in a side view and a horizontally long rectangle in a front view. The joint portion 44c has a trapezoidal shape in a side view and a vertically long rectangle in a front view. The center of the front end of the defroster case 43 is fixed to the front end of the joint portion 44a, and the rear end of the joint portion 44a is fixed to the right end of the plate portion 44b. The left end of the plate portion 44b is fixed to the front end of the joint portion 44c, and the rear end of the joint portion 44c is fixed to the defroster case 43. The joining portion 44 a of the partition plate 44 is located at the left and right central portion inside the defroster case 43.
[0029]
Since the partition plate 44 is configured as described above, the air flowing in from the suction ports 45L and 45R is sent to the left defroster chamber 43L and the right defroster chamber 43R, respectively, and does not contact each other. Further, the opening areas of the suction ports 45L and 45R are configured to be equal, and the amount of air flowing into the left defroster chamber 43L and the right defroster chamber 43R is set to be approximately equal on the left and right. Therefore, the air flow coming out of the duct 42 is first divided into two equal amounts at the suction ports 45L and 45R, and the same amount is maintained on the left and right sides of the partition plate 44 and sent to the left defroster chamber 43L and the right defroster chamber 43R. For this reason, an equal amount of air is discharged from the outlet 46 toward the windshield 48 on the left and right. As described above, dry air flows into the defroster 40. By discharging the dry air from the outlet 46, the windshield 48 is prevented from being fogged.
[0030]
With the above configuration, even when the connection location of the duct 42 connected to the defroster 40 is biased to one of the left and right sides as in this embodiment, the air flow rate to the windshield 48 can be made uniform left and right. is there.
[0031]
Further, in the configuration in which the indoor unit of the air conditioner is disposed in the cabin disposed in the traveling vehicle, the indoor unit of the air conditioner is disposed at the lower part of the foot in the cabin. In addition, the indoor unit of the air conditioner can be disposed in the cab without damaging the internal space of the cab.
[0032]
Further, in the configuration in which the cabin is arranged on the overhang portion of the traveling vehicle and the indoor unit of the air conditioner is arranged in the cabin, the air conditioning is performed on the overhang portion of the fuselage protruding forward from the front wheels and on the lower leg. Since the indoor unit of the device is installed, even when a cabin is installed at the front of the aircraft, the indoor unit of the air conditioner is arranged in the cab without changing the overall length and height of the vehicle or damaging the interior space of the cab. It can be set up.
[0033]
Further, since the outer wall of the lower part of the foot is inclined so as to become higher as it goes away from the wheel in the horizontal direction, the size of the approach angle that favors running performance on uneven terrain can be maintained large.
[0034]
Moreover, since the outer wall shape of the lower part of the indoor unit substantially coincides with the outer wall shape of the lower part of the foot, the indoor unit can be arranged by effectively using the space below the cab.
[0035]
Further, in the configuration in which the indoor unit of the air conditioner is arranged in the cabin arranged in the traveling vehicle, the driver's seat is arranged at the center of the left and right in the cabin, and the side for enabling getting on and off the left and right sides of the driver's seat Since the door is provided and the indoor unit of the air conditioner is arranged on the other side of the left and right, it is not necessary to arrange it in the space for getting on and off the worker. For this reason, the indoor unit does not become an obstacle to getting on and off.
[0036]
In addition, since the speed change operation device is disposed above the indoor unit of the air conditioner, the dead space can be effectively utilized. For this reason, it is not necessary to newly cut the interior space of the cab for the indoor unit of the air conditioner.
[0037]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
The indoor unit (20) of the air conditioner (9) is disposed in the cabin (10) disposed in the self-propelled control machine (1) as defined in claim 1, and the windshield is mounted on the indoor unit (20). In the configuration in which the defroster (40) of (48) is connected, a partition plate (44) that divides the inside of the defroster case (43) into substantially right and left is provided inside the defroster case (43) constituting the defroster (40). ) And the space of the defroster case (43) is divided into a left defroster chamber (43L) and a right defroster chamber (43R) by the partition plate (44), so that a plurality of defrosters having equivalent anti-fogging performance are provided. The same effect can be obtained. For this reason, since the same effect as that in which a plurality of defrosters operate at a plurality of locations at the same time is obtained, there is no bias in the anti-fogging of the windshield.
[0038]
Further, since the partition plate divides the defroster case into left and right parts, the dry air is discharged evenly on the left and right sides of the windshield, and the anti-fogging is not biased on the left and right sides of the windshield.
[0039]
Further, the defroster case (43) and the indoor unit (20) are connected to each other by a single duct (42), and a discharge port (42a) is provided at the upper end of the single duct (42). (42a), left and right defroster chambers (43L) and right defroster chambers, which are opened by left and right inlets (45R and 45L) through which air from the duct (42) flows, are divided by the partition plate (44). Since the left and right suction ports (45R and 45L) are opened correspondingly for each (43R), the amount of internal space occupied by the duct connecting the indoor unit and the defroster case can be reduced. . Moreover, the defroster can be expected to have a uniform anti-fogging effect without using a plurality of ducts. In addition, an effective anti-fogging effect can be expected for the defroster with a single duct, so there is no need to limit the place where the duct is disposed, and a great degree of freedom can be given to the layout inside the cab. .
[0040]
In addition, since the suction port of the defroster case is provided for each of the plurality of defroster chambers divided by the partition plate, a uniform defrosting effect can be obtained by discharging homogeneous dry air to a plurality of locations even though the defroster is a single defroster. You can get it. In addition, since each defroster room is provided with a suction port, it is possible to obtain dry air from a single duct that does not depend on the location of the defroster room, which gives a great degree of freedom to the layout inside the cab. is there.
[0041]
In claim 2, the air conditioning apparatus of the self-propelled control apparatus according to claim 1, wherein said defroster (40) extending in the lateral direction of the interior of the cabin (10), the front end of the defroster (40) And a synthetic resin adhesive (52) between the self-propelled control machine windshield (48), and the defroster (40) and windshield (48) are connected by the adhesive (52). The defroster (40) also serves as the front frame of the cabin (10), which leads to a reduction in the number of members, leading to cost reduction and improvement in maintenance. In particular, it is possible not to blow through the front frame but to blow from the nearest glass, so that it is possible to prevent fogging of the lower end of the windshield. Therefore, fog prevention is realized over a wide range.
[Brief description of the drawings]
FIG. 1 is a side view of a traveling vehicle.
FIG. 2 is a plan view of a traveling vehicle.
FIG. 3 is a plan view showing an air conditioner and a defroster.
FIG. 4 is a side view showing an air conditioner and a defroster.
FIG. 5 is a cross-sectional view taken along arrow B showing an air case.
FIG. 6 is a schematic view of an air conditioner device.
FIG. 7 is a cross-sectional view taken along the arrow A showing a defroster case.
FIG. 8 is a side sectional view showing a defroster case.
[Explanation of symbols]
3 Driver's seat 10 Cabin 15 Front overhang 20 Indoor unit 22 Shifting operation column 40 Defroster 43 Defroster case 44 Partition plate 45R / 45L Suction port

Claims (2)

The indoor unit (20) of the air conditioner (9) is arranged in the cabin (10) arranged in the self-propelled control machine (1), and the defroster (40) of the windshield (48) is placed in the indoor unit (20). ) In the defroster case (43) constituting the defroster (40) is provided with a partition plate (44) that divides the inside of the defroster case (43) into substantially right and left, and the defroster case The space of (43) is divided into a left defroster chamber (43L) and a right defroster chamber (43R) by the partition plate (44) , and the defroster case (43) and the indoor unit (20) are separated by a single duct ( 42), a discharge port (42a) is provided at the upper end of the one duct (42), and a suction port (45R) through which air from the duct (42) flows into the discharge port (42a).・ 45L) on the left Open to the partition (44) left defroster chamber divided by (43L) and right defroster chamber (43R) each, said left and right inlet (45R · 45L), respectively corresponding to open The air conditioner of the self-propelled control machine. The air conditioner for a self-propelled pest control machine according to claim 1, wherein the defroster (40) extends in the left-right direction inside the cabin (10), and the front end of the defroster (40) and the self-propelled pest control An adhesive (52) made of a synthetic resin is sandwiched between the windshield (48) of the machine, and the defroster (40) and the windshield (48) are connected by the adhesive (52), and the defroster (40 ) Also serves as a front frame of the cabin (10) .

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