JP2004114749A - Outside air introducing structure of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress degradation of the air-conditioning performance attributable to clogging of an air cleaner even when the air cleaner is not frequently cleaned or a filtration material is not frequency exchanged. <P>SOLUTION: In an outside air introducing structure of a working machine equipped with an operation cabin 6 having an air-conditioner 31, outside air is introduced through an outside air introducing passage 35 to the air-conditioner 31 via a pre-cleaner 20 having exchangeable filtration materials 23 and 24 and an air cleaner 21. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an outside air introduction structure for a working machine equipped with an operation cabin provided with an air conditioner.
[0002]
[Prior art]
Conventionally, as the outside air introduction structure of the working machine as described above, an outside air introduction path to the air conditioner, a dusting tool made of a punching metal for suppressing the entry of coarse dust into the outside air introduction path, and an outside air introduction path to the outside air introduction path There is a device equipped with an outside air filter (an example of an air cleaner) that removes dust that has flowed in along with it (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-111143 (paragraph number 0019, FIGS. 2-5, 7-9)
[0004]
[Problems to be solved by the invention]
However, for example, in a combine, which is an example of a working machine, if an air conditioner is operated during a harvesting operation for harvesting a crop such as wheat, which generates a large amount of dust such as straw chips, a large amount of dust passing through a dust remover is required. As a result, the air cleaner immediately becomes clogged, which tends to cause a decrease in air conditioning performance due to the clogging. Further, in order to avoid the deterioration of the air-conditioning performance, it is necessary to frequently clean the air cleaner and replace the filter medium provided in the air cleaner.
[0005]
It is an object of the present invention to suppress a decrease in air conditioning performance due to clogging of an air cleaner without frequently cleaning the air cleaner or replacing a filter medium.
[0006]
[Means for Solving the Problems]
〔Constitution〕
In order to achieve the above object, in the invention according to claim 1 of the present invention, in the outside air introduction structure of a working machine equipped with an operation cabin equipped with an air conditioner, an outside air introduction path to the air conditioner is The outside air was introduced through a precleaner provided with a replaceable filter medium and an air cleaner.
[0007]
[Action]
According to the first aspect of the invention, when outside air is introduced into the air conditioner, coarse dust and relatively large dust guided together with the outside air are removed by the filtering action of the pre-cleaner, and pass through the pre-cleaner. Relatively small dust is removed by the filtering action of the air cleaner. As a result, even when the air conditioner is operated during work in which a large amount of dust is generated, the air cleaner does not immediately become clogged as in the case where the large amount of dust is removed only by the filtering action of the air cleaner. .
[0008]
〔effect〕
Therefore, it is possible to suppress a decrease in air conditioning performance due to clogging of the air cleaner without frequently cleaning the air cleaner and replacing the filter medium.
[0009]
〔Constitution〕
In the invention according to claim 2 of the present invention, in the invention according to claim 1, a portion of the outside air introduction path for an engine equipped with the precleaner, which is on a lower side in the outside air introduction direction than the precleaner, is provided. The outside air introduction path for air conditioning was connected.
[0010]
[Action]
According to the second aspect of the present invention, when outside air is introduced into the air conditioner, the outside air from which coarse dust and relatively large dust have been removed by the filtering action of the precleaner provided in the outside air introduction path for the engine is used for air conditioning. The relatively small dust that has been guided to the outside air introduction path and passed through the engine pre-cleaner is removed by the filtering action of the air cleaner provided in the outside air introduction path for air conditioning. In other words, the pre-cleaner for the engine can also be used for air-conditioning, and the number of pre-cleaners can be reduced compared to the case where a new pre-cleaner for air conditioning is newly installed. It is possible to reduce the labor required for cleaning the filter and replacing the filter medium.
[0011]
〔effect〕
Therefore, it is possible to suppress a decrease in air conditioning performance due to clogging of the air cleaner without frequently cleaning the air cleaner or replacing the filter medium while reducing manufacturing costs and improving maintainability.
[0012]
〔Constitution〕
In the invention according to claim 3 of the present invention, in the invention according to claim 2, the engine is provided with the air cleaner in the outside air introduction path for the engine at a position on the lower side in the outside air introduction direction with respect to the air cleaner. The outside air introduction path for air conditioning was connected.
[0013]
[Action]
According to the third aspect of the invention, when outside air is introduced into the air conditioner, coarse dust and relatively large dust are removed by the filtering action of the pre-cleaner provided in the outside air introduction path for the engine. After the relatively small dust that has passed is removed by the filtering action of the air cleaner provided in the outside air introduction path for the engine, the outside air is led to the outside air introduction path for air conditioning. In other words, the pre-cleaner for the engine and the air cleaner can also be used for air conditioning, and the number of pre-cleaners and air cleaners can be reduced compared to the case where a new pre-cleaner and air cleaner for air conditioning are newly provided. It is possible to reduce the amount of time required for cleaning each cleaner and replacing the filter medium, etc.
[0014]
〔effect〕
Therefore, it is possible to suppress the deterioration of the air conditioning performance due to the clogging of the air cleaner without frequently performing the cleaning of the air cleaner and the replacement of the filter medium, while effectively reducing the manufacturing cost and improving the maintainability. became.
[0015]
〔Constitution〕
In the invention described in claim 4 of the present invention, in the invention described in claim 2, a connection point of the engine outside air introduction path to which the outside air introduction path for air conditioning is connected and a connection point for the engine A check valve is provided between the engine and the air cleaner installed in the outside air introduction path.
[0016]
[Action]
According to the fourth aspect of the present invention, when the air conditioner is operated with the engine stopped, dust removed by the air cleaner for the engine flows back through the outside air introduction path for the engine due to the intake action of the air conditioner. As a result, it is possible to avoid inconvenience of flowing into the outside air introduction path for air conditioning, and to prevent clogging of the air cleaner for air conditioning caused by the inflow.
[0017]
〔effect〕
Accordingly, it is possible to avoid a decrease in air conditioning performance due to clogging of the air conditioning air cleaner due to the backflow of dust from the engine air cleaner.
[0018]
〔Constitution〕
In the invention according to claim 5 of the present invention, in the invention according to any one of claims 2 to 4, a check valve is provided in the outside air introduction path for air conditioning.
[0019]
[Action]
According to the fifth aspect of the present invention, when the air conditioner is stopped in the engine operating state, the air in the operating cabin flows back through the air conditioning external air introduction path due to the intake action of the engine, and the inside of the operating cabin is reduced. The problem of negative pressure can be avoided, and the problem of coarse dust and dust flowing into the driving cabin together with outside air from the gap in the driving cabin due to the negative pressure can be prevented.
[0020]
〔effect〕
Therefore, it is possible to avoid a decrease in the livability due to the backflow of the air in the driving cabin.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an overall side view of a self-removing combine which is an example of a working machine. The combine is mounted on a front part of a traveling machine body 2 which is driven by a pair of left and right crawler traveling devices 1. A mowing transport unit 3 that cuts the culm and transports it rearward is connected so as to be able to drive up and down, and performs a threshing process on the mowing grain culm from the mowing transport unit 3 and a process obtained by the threshing process. A threshing device 4 that performs sorting processing on the objects and a grain tank 5 that stores the grains from the threshing device 4 are mounted on the traveling machine body 2 and are operated at a position in front of the grain tank 5 in the traveling machine body 2. It is equipped with a cabin 6.
[0022]
As shown in FIGS. 1 to 3, an auxiliary step 7 used for getting on and off the driving cabin 6 is provided at the right front of the traveling body 2, and the auxiliary step 7 extends from both front and rear ends thereof. The support arm 8 is connected via a fulcrum pin 11 to a pair of front and rear L-shaped brackets 10 welded to the body frame 9 so that the use position located below the bottom surface of the body frame 9 and the body frame 9 Are vertically swingable over a storage position located above the bottom surface of the support arm 8, and the lower edge of each support arm 8 is held in the use position by contacting the corresponding L-shaped bracket 10. Is held in the storage position by contacting the L-shaped bracket 10 corresponding to the body frame 9 with the extended end of the body frame 9.
[0023]
As shown in FIG. 3, each L-shaped bracket 10 is welded to the body frame 9 so as not to protrude below the body frame 9, so that during the harvesting operation in which the auxiliary step 7 is located in the storage position. The occurrence of inconvenience in which each L-shaped bracket 10 is deformed by contacting a ridge or the like can be suppressed.
[0024]
As shown in FIGS. 1, 4 and 5, an engine room 12 is formed between the traveling body 1 and the driving cabin 6. The engine room 12 has an engine 13 and an outside air introduction path 14 for the engine 13. , An air cleaner 15 provided in the vehicle. The outside air introduction path 14 is connected to a first intake port 16 for introducing outside air formed at the upper rear end of the operating cabin 6, and a first internal intake pipe 18 extending from the first intake port 16 to the air cleaner 15. And a second internal intake pipe 19 extending from the air cleaner 15 to the engine 13, a pre-cleaner 20 is connected to the external intake pipe 17, and an external air filter (an example of an air cleaner) 21 is connected to the first intake port 16. Equipped. As the air cleaner 15, the pre-cleaner 20, and the outside air filter 21, those provided with replaceable filter media 22 to 24 are employed.
[0025]
An air-conditioning room 26 and a storage space 27 are formed on the ceiling 25 of the driving cabin 6 in front and rear, and a first internal intake pipe 18 connected to the right half of the first intake port 16 is provided with a storage space 27 in the rear. And an internal space 29 provided in the right rear column 28 of the driving cabin 6, and is connected to the air cleaner 15 in the engine room 12.
[0026]
The air-conditioning room 26 is introduced into the air-conditioning room 26 through the second air inlet 33 for introducing the inside air from the living space 32 of the driving cabin 6 by the suction operation of the air-conditioning device 31 having the intake fan 30 and the suction action of the intake fan 30. An inside air filter 34 for filtering the inside air of the cabin is provided, and an air conditioning intake pipe 36 for forming an outside air introduction path 35 for the air conditioner 31 is provided in the storage space 27.
[0027]
One end of the intake pipe 36 is connected to the left half of the first intake port 16 located at a position on the downstream side of the pre-cleaner 20 in the outside air introduction direction in the outside air introduction path 14 for the engine, and the other end thereof is air-conditioned. In the room 26, the ceiling 25 of the operating cabin 6 is divided into the air-conditioning room 26 and the storage space 27 by the partition wall 38 so that the outside air introduction path 35 and the inside air introduction path 37 for air conditioning do not hinder each other's air introduction. It is connected to a communication port 39 formed at a position closer to the left from the left and right central portions, and a check valve 40 is provided at an intermediate portion thereof.
[0028]
With the above configuration, when the engine 13 is operating, coarse dust and relatively large dust are removed by the filtering action of the pre-cleaner 20, and relatively small dust passing through the pre-cleaner 20 is removed by the filtering action of the outside air filter 21. Further, after the relatively small dust that has passed through the outside air filter 21 has been removed by the filtering action of the air cleaner 15, more purified outside air is introduced into the engine 13.
[0029]
When the air conditioner 31 is operated, coarse dust and relatively large dust are removed by the suction action of the intake fan 30 and the filtering action of the pre-cleaner 20 provided in the outside air introduction path 14 for the engine. After the relatively small dust that has passed through the cleaner 20 has been removed by the filtering action of the outside air filter 21, the outside air is led to the outside air introduction path 35 for air conditioning, and together with the inside air of the cabin purified by the filtering action of the inside air filter 34. It is introduced into the air conditioner 31. In other words, by using the engine pre-cleaner 20 for air conditioning as well, it is possible to introduce more purified outside air into the air conditioner 31, but also to provide a new pre-cleaner 20 exclusively for air conditioning. As a result, the number of the pre-cleaners 20 can be reduced, so that the manufacturing cost can be reduced, and the labor required for cleaning the pre-cleaners 20 and replacing the filter media 23 and 24 can be reduced.
[0030]
Further, even if the air conditioner 31 is operated at the time of harvesting wheat or the like that generates a large amount of dust such as straw waste, the outside air filter is removed as in the case where the large amount of dust is removed only by the filtering operation of the outside air filter 21. The air conditioner 21 does not immediately become clogged, so that it is possible to suppress the deterioration of the air conditioning performance due to the clogging of the outside air filter 21 without frequently cleaning the outside air filter 21 and replacing the filter medium 24. Has become.
[0031]
Furthermore, when the air conditioner 31 is in operation, the outside air introduction path 35 and the inside air introduction path 37 for air conditioning do not hinder each other's air introduction. Can be avoided.
[0032]
In addition, the first internal intake pipe 18 for the engine and the intake pipe 36 for air conditioning which are located on the lower side of the first intake port 16 provided with the outside air filter 21 with respect to the outside air introduction direction with respect to the first intake port 16. When the air conditioner 31 is operated while the engine 13 is stopped, the dust removed by the engine air cleaner 15 is removed by the intake action of the intake fan 30 so that the external air introduction path for the engine is connected. It is possible to suppress the inconvenience of backflow of the airflow into the outside air introduction path 35 for air conditioning and the inconvenience of clogging of the outside air filter 21 on the side of the outside air introduction path for air conditioning in the outside air filter 21 due to the backflow of dust. It has become.
[0033]
In addition, by providing the check valve 40 in the outside air introduction path 35 for air conditioning, when the air conditioner 31 is stopped while the engine 13 is operating, the air in the operating cabin 6 is actuated by the intake action of the engine 13. Can be prevented from flowing backward through the outside air introduction path 35 for air conditioning, and the inside of the driving cabin 6 becomes negative pressure. Due to the negative pressure, coarse dust and dust are removed from the driving cabin 6 together with the outside air along with the outside air. 6 can be prevented from occurring.
[0034]
The outside air filter 21 is provided at the first intake port 16 for introducing outside air formed above the rear part of the rear glass 41 at the rear end upper part of the operating cabin 6, and the external intake pipe 17 is connected to the precleaner 20. Thus, the replacement of the filter media 23 and 24 can be easily performed from outside the operation cabin 6.
[0035]
[Another embodiment]
Hereinafter, other embodiments of the present invention will be listed.
[0036]
(1) The working machine may be a normal combine, a backhoe, or a tractor provided with the driving cabin 6.
[0037]
(2) As shown by a two-dot chain line in FIG. 4, the first interior located between the connection point of the engine outside air introduction path 14 to which the air conditioning outside air introduction path 35 is connected and the engine air cleaner 15. By interposing a check valve 42 in the intake pipe 18, when the air conditioner 31 is operated while the engine 13 is stopped, dust removed by the engine air cleaner 15 is removed by the intake action of the intake fan 30. Due to the inconvenience of flowing back into the outside air introduction path 35 for air conditioning by flowing backward through the outside air introduction path 14 for the engine, and the backflow of dust, clogging of the outside air filter 21 on the side of the outside air introduction path for air conditioning is promoted. The inconvenience may be prevented, and a decrease in air conditioning performance due to the clogging may be more effectively suppressed.
[0038]
(3) As shown in FIG. 6, an external air introduction path 35 for air conditioning is provided to the second internal intake pipe 19 which is a part of the external air introduction path 14 for the engine equipped with the air cleaner 15 which is on the lower side in the external air introduction direction than the air cleaner 15. When the air conditioner 31 is operated, coarse dust and relatively large dust are removed by the filtering action of the precleaner 20 provided in the outside air introduction path 14 for the engine. The outside air after the very small dust is removed by the filtering action of the air cleaner 15 provided in the outside air introduction passage 14 for the engine may be guided to the outside air introduction passage 35 for air conditioning.
[0039]
According to this configuration, the engine pre-cleaner 20 and the air cleaner 15 can also be used for air conditioning, and the pre-cleaner 20 and the air cleaners 15 and 15 can be used as compared with the case where the pre-cleaner 20 and the air cleaner 21 dedicated to air conditioning are newly provided. Since the number of equipments 21 can be reduced, it is possible to more effectively reduce the manufacturing cost, and the labor required for cleaning the cleaners 15, 20, 21 and replacing the filter media 22 to 24.
[0040]
Also in this alternative embodiment, if the check valve 40 is interposed in the outside air introduction path 35 for air conditioning, when the air conditioner 31 is stopped while the engine 13 is operating, the intake action of the engine 13 causes It is possible to avoid a disadvantage that the air in the operation cabin 6 flows backward through the outside air introduction path 35 for air conditioning and the inside of the operation cabin 6 becomes a negative pressure. At the same time, it is possible to prevent the inconvenience that coarse dust and dust flow into the driving cabin 6.
[0041]
(4) As shown in FIGS. 7 and 8, the outside air introduction path 35 for the air conditioner 31 provided in the air conditioning room 26 is separated from the outside air first intake port 16 provided with the outside air filter 21 dedicated for air conditioning. The external air intake pipe 17 is formed by an intake pipe 36 extending through a communication port 39 of the air inlet 38, an external air intake pipe 17 connected to the first air intake port 16, and the like. When the air conditioner is operated, the outside air introduction path 35 for air conditioning is configured to introduce outside air into the air conditioner 31 via the pre-cleaner 20 having the replaceable filter media 23 and 24 and the outside air filter 21 (an example of an air cleaner). May be.
[0042]
According to this configuration, the coarse dust and relatively large dust guided together with the outside air are removed by the filtering operation of the pre-cleaner 20, and the relatively small dust passing through the pre-cleaner 20 is removed from the outside air filter 21 by the air conditioner 31. Since the purified outside air removed by the filtering action is introduced together with the cabin inside air purified by the filtering action of the inside air filter 34, the air conditioner 31 is used during the operation in which a large amount of dust is generated. Even when the air filter 21 is operated, the outside air filter 21 does not immediately become clogged as in the case where a large amount of dust is removed only by the filtering action of the outside air filter 21. It is possible to suppress a decrease in performance.
[Brief description of the drawings]
FIG. 1 is an overall side view of a self-removing combine. FIG. 2 is a front view of an auxiliary step. FIG. 3 is a plan view of an auxiliary step. FIG. 4 is a vertical side view of a main part showing an external air introduction path. FIG. 6 is a cross-sectional plan view of a main part showing an introduction route. FIG. 6 is a vertical sectional side view of a main part showing another embodiment in which a precleaner for an engine and an air cleaner are also used for air conditioning. FIG. 8 is a cross-sectional plan view of a main part showing another embodiment including a pre-cleaner and an air cleaner dedicated to air conditioning;
6 Operating cabin 14 Outside air introduction route (for engine)
15 Air cleaner (for engine)
20 Pre-cleaner 21 Air cleaner (for air conditioning)
22 filter medium 23 filter medium 24 filter medium 31 air conditioner 35 outside air introduction route (for air conditioning)
40 Check valve 42 Check valve

Claims (5)

An outside air introduction structure of a working machine equipped with a driving cabin equipped with an air conditioner,
An outside air introduction structure of a working machine, wherein an outside air introduction path to the air conditioner is configured to introduce outside air through a pre-cleaner having an exchangeable filter medium and an air cleaner. 2. The outside air introduction structure for a working machine according to claim 1, wherein the outside air introduction path for air conditioning is connected to a part of the outside air introduction path for the engine equipped with the precleaner that is on a lower side in the outside air introduction direction than the precleaner. 3. . The outside air introduction structure for a working machine according to claim 2, wherein the outside air introduction path for air conditioning is connected to a portion of the outside air introduction path for the engine equipped with the air cleaner, which is on a lower side in the outside air introduction direction than the air cleaner. 3. A check valve is provided between a connection point of the engine outside air introduction path to which the air conditioning outside air introduction path is connected and an engine air cleaner provided in the engine outside air introduction path. 4. The outside air introduction structure of the working machine described in 1. The outside air introduction structure for a working machine according to any one of claims 2 to 4, wherein a check valve is provided in the outside air introduction path for air conditioning.

Images