JP3778423B2 - Mounting structure of outside air introduction filter for air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for mounting an outside air introduction filter for an air conditioner in a cab of a construction machine.
[0002]
[Prior art]
In a hydraulic excavator, a crane, or a construction machine that is an application of these, an air conditioner for a cab is installed. A filter for removing dust in the outside air introduced into the cab is attached to the rear of the cab. FIG. 9 is a longitudinal sectional view showing a conventional filter mounting structure. 60 is a rain protection duct attached to the rear wall 61 of the cab, 62 is a filter case attached to the duct 60 with bolts 63, and 64 is a filter. The filter 64 is formed from an opening 62 b of the top plate 62 a of the filter case 62. The lower part is attached to the guide frame 65 fixed to the upper surface of the bottom plate 62c of the filter case 62 so that it can be inserted and removed. 66 is a packing that is attached to the upper surface of the bottom plate 62c of the filter case 62, and on which the bottom plate 64a of the filter 64 is placed. 67 is a packing that is attached to the side plate of the filter case 62 and that contacts the side plate 64b of the filter 64. The packings 66 and 67 prevent passage of outside air from between the outer surface of the filter 64 and the inner surface of the filter case 62. Reference numeral 68 denotes a flow of introduced outside air.
[0003]
[Problems to be solved by the invention]
In the above conventional structure, the dust accumulated on the bottom plate 62a of the filter case 62 is a structure that cannot be removed unless the filter case 62 is removed, and therefore, the cleaning inside the filter case 62 is not easy. There is.
[0004]
Further, since the packings 66 and 67 are attached to the inner surface of the filter case 62, there is a problem that the replacement due to aging of the packings 66 and 67 cannot be performed unless the filter case 62 is removed.
[0005]
In view of the above problems, the present invention can easily replace packings and easily remove dust accumulated on the bottom plate of a filter case in an outside air introduction structure for an air conditioner filter in a cab of a construction machine. The purpose is to provide.
[0006]
[Means for Solving the Problems]
The attachment structure of the outside air introduction filter for an air conditioner according to claim 1 is the attachment structure of an outside air introduction filter for an air conditioner attached to a cab of a construction machine.
Provided inside the operator's cab a filter case that accommodates the filter, and the bottom plate of the filter case is inclined so that the outside is lowered,
In the lower part of the duct that protrudes to the outside in the cab, a discharge port for discharging dust accumulated on the bottom plate of the filter case is provided,
The filter includes a filter support fitted on the filter,
Removably attach the filter from the opening provided in the filter case,
Inclining the bottom plate of the filter support in the same direction as the bottom plate of the filter case,
The packing is attached to the side plate of the filter support, and the packing to be placed on the upper surface of the bottom plate of the filter case is attached to the lower surface of the filter support plate .
[0007]
Thus, if the packing is attached to the filter side , the packing can be taken out of the filter case by removing the filter , and the packing can be easily replaced. In addition, the packing can be removed to the outside, the bottom plate of the filter case is inclined so that the outside is lowered, and the dust discharge part is provided at the lower part of the duct, so that dust accumulated on the bottom plate of the filter case can be removed. It can be easily discharged from the discharge port along the slope, and cleaning becomes easy.
[0008]
Further, when the bottom plate of the filter case and the filter support are inclined in the same direction, the packing interposed between them is uniformly compressed on the upper surface of the bottom plate of the filter case, and good airtightness is maintained.
[0009]
Mounting structure of the outside air introducing filter air conditioner according to claim 2, in claim 1,
The filter support has side plates and a bottom plate on both sides,
The filter has a structure in which a filter body is fixed to a frame composed of a top plate, a side plate, and a bottom plate,
The bottom plate of the filter support has a portion that protrudes outward from the lower side of the side plate of the filter support, and a packing is attached to the upper surface of the bottom plate of the filter support;
The filter and the filter support have a structure that is detachably mounted from an opening provided in a top plate of the filter case,
The width of the side plate of the filter support is narrower than the width of the side plate of the filter, and a part of the side plate of the filter is protruded from the side plate of the filter support toward the outside of the cab,
Pasting the packing on the lower surface of the bottom plate of the filter corresponding to the protruding portion of the side plate of the filter outward and the protruding portion of the side plate,
The filter case and the filter are mounted by placing the packing on the lower surface of the bottom plate of the filter on the packing on the upper surface of the bottom plate of the filter support, and bringing the packing of the side plate of the filter into contact with the inner surface of the side plate of the filter case. To do.
[0010]
If it is such a structure, the filter of the normal commercially available structure where a baseplate makes flat form can be used for a filter. In addition, the packing is attached to the side plate of the filter instead of the side surface of the filter support to achieve airtightness with the inner surface of the side plate of the filter case, and can be implemented without reducing the width of the filter.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a partially cutaway side view of a driver's cab showing an embodiment of a structure for attaching an outside air introduction filter for an air conditioner according to the present invention. In FIG. 1, 1 is a cab of a construction machine, 2 is an air conditioner unit attached to the rear part of the cab 1, and the air conditioner unit includes a blower for cooling, an evaporator, a heat exchanger for heating, a fan, And these control systems and piping. 2a is an outside air introducing device to the air conditioner unit. The outside air introduction device 2 a includes a duct 4 attached to the rear wall 3 of the cab 1, a filter case 5 attached to the duct 4, a filter support 6 accommodated in the filter case 5, and a filter 7. .
[0012]
The duct 4 has a box shape as shown in FIG. 2, is fitted into the opening 8 of the rear wall 3, the inner plate 9 protrudes to the outer periphery to form a flange 10, and a screw 11 inserted through the hole of the flange 10. Is fixed by screwing into a nut 12 welded to the rear wall 3.
[0013]
The duct 4 has an air introduction port 14 below the outer plate 13, and a rectifying plate 15 is provided inside the air introduction port 14. In addition, an opening 16 that passes from the air inlet 14 to the filter 7 is provided in the upper portion of the inner plate 9. The lower portion of the inner plate 9 and the bottom plate 17 are provided with outlets 18 and 19 for discharging dust accumulated in the filter case 5. Reference numeral 20 denotes a filter case mounting nut welded to the inner plate 9.
[0014]
3A and 3B are a longitudinal sectional view and a plan view of the filter case 5, respectively. The filter case 5 has a box shape including an outer plate 22, an inner plate 23, left and right side plates 24, a top plate 25, and a bottom plate 26. The outer plate 22 has an opening 27 for allowing outside air to pass through the filter 7, and as shown in the longitudinal sectional view of FIG. 4 and the plan view of FIG. A screw 30 is passed through the groove 29 and screwed into a nut 20 provided in the duct 4 to be fixedly attached to the duct 4.
[0015]
The top plate 25 of the filter case 5 is provided with an opening 32 for inserting the filter support 6 and the filter 7, and a packing 33 made of rubber or the like is attached around the opening 32. A nut 34 for attaching the filter support 6 is welded to the top plate 25. A connection port 35 for connecting a duct (not shown) for connecting to the air conditioner is attached to the inside of the filter case 5.
[0016]
The bottom plate 26 of the filter case 5 is formed in an inclined structure in which the rear part is lowered in order to facilitate the natural fall of dust and discharge by cleaning. On the left and right sides of the upper surface of the bottom plate 26, there are provided guide plates 36 into which the lower portions of the filter support 6 and the filter 7 are fitted.
[0017]
6 (A) and 6 (B) are a plan view and a rear view of the filter support 6, FIG. 7 (A) is a side view of the filter support 6, and FIG. 7 (B) is a cross section taken along line EE of FIG. 7 (A). FIG. The filter support 6 includes left and right side plates 37, a bottom plate 38, and a mounting plate 41 that extends and welds to the top of the side plate 37. A mounting hole 42 is provided in the front and rear of the mounting plate 41. ing.
[0018]
Similar to the bottom plate 26 of the filter case 5, the bottom plate 38 of the filter support 6 has an inclined structure in which the rear is lowered. The bottom plate 38 has an extending portion 38a that extends rearward from the side plate. A packing 39 made of rubber or the like is attached to the lower surface of the bottom plate 38, and a packing 40 is also attached to the upper surface of the bottom plate 38.
[0019]
8A, 8B, and 8C are a front view, a side view, and a plan view of the filter 7, respectively. The filter 7 has a structure in which a dust removing filter body 46 is mounted in a frame made up of left and right side plates 43, a bottom plate 44 and a top plate 45. At both ends of the top plate 45, there are provided locking claws 47 made of an elastic material that is elastically locked to the mounting plate 41 of the filter support 6 and fixes the filter 7. A front-rear width W2 (see FIG. 7A) of the side plate 37 of the filter support 6 is formed to be narrower than a front-rear width W1 of the side plate 43 of the filter 7.
[0020]
A packing 49 is attached to the rear outer surface of the side plate 43 of the filter 7 and the rear side of the lower surface of the bottom plate 44. The material of the packing 49 and the packings 33, 39, and 40 is not particularly limited, but urethane rubber or neoprene rubber is preferably used. Reference numeral 50 denotes a handle fixed on the top plate 45 for attaching / detaching the filter.
[0021]
As shown in the plan view of FIG. 4 and the longitudinal cross-sectional view of FIG. 5A, the filter 7 is fitted on the filter support 6, and the locking claw 47 of the filter 7 is locked to the mounting plate 41 of the filter support 6. Join. In this coupled state, the front portion of the lower surface of the bottom plate 44 of the filter 7 abuts against the packing 40 on the bottom plate 38 of the filter support 6 and compresses it, and the packing 49 on the lower surface of the bottom plate 44 of the filter 7 Both packings are compressed in contact with the packing 40.
[0022]
In this state, the filter support 6 and the filter 7 are inserted from the opening 32 of the top plate 25 of the filter case 5, and the packing 39 on the lower surface of the bottom plate 38 of the filter support 6 is placed on the bottom plate 26 of the filter case 5. At the same time, as shown in FIG. 5B, the packing 49 attached to the side plate 43 of the filter 7 is pressed against the side plate 24 of the filter case 5. Then, the filter support 6 is fixed to the filter case 5 by inserting the screw 51 through the mounting hole 42 of the mounting plate 41 and screwing it into the nut 34 fixed to the top plate 25 of the filter case 5. In FIG. 4, dotted arrows indicate the flow of air when introducing the outside air. When removing the filter 7, the 51 is removed and the filter 7 is removed together with the filter support 6.
[0023]
As described above, when the filter 7 is attached to the filter case 5 together with the filter case 6, the bottom plate 26 of the filter case 5 and the bottom plate 38 of the filter support 6 are parallel to each other, and the packing 39 is between the two in the entire front and rear width. Since it is uniformly compressed, a good airtight state is maintained. Further, the bottom plate 38 of the filter case 6 is inclined and the bottom plate 44 of the filter 7 is horizontal. However, since the packing 40 is provided only on the rear surface of the bottom plate 44 of the filter, the bottom plate 38 of the filter case 6 The bottom plate 44 does not come into contact with the packing 40 and a good airtight state is maintained.
[0024]
Further, the top plate 45 of the filter 7 compresses the packing 33 at the edge of the opening 32 and keeps the airtightness of the opening 32. Further, as shown in FIG. 5B, the gap between both sides of the filter 7 and the side plate 24 of the filter case 5 is closed with a packing 49 to maintain airtightness.
[0025]
Since the packings 39 and 49 are attached to the filter side members (the filter support 6 and the filter 7) in this way, the packings 39 and 49 that are in contact with the filter case 5 can be removed by removing these members from the filter case 5. It can be taken out of the case 5 and the packings 39 and 49 can be easily replaced. In addition, the packing 40 between the filter support 6 and the filter 7 can be easily replaced.
[0026]
In addition, the bottom plate 26 of the filter case 5 is inclined so that the rear side is lowered, and the dust discharge portions 18 and 19 are provided at the lower portion of the duct 4, so that dust accumulated on the bottom plate 26 of the filter case 5 is moved along the slope. Thus, it can be easily discharged from the discharge ports 18 and 19, and cleaning becomes easy.
[0027]
Further, since the packing 49 of the bottom plate 44 of the filter 7 is attached to the rear portion with respect to the packing 40 on the bottom plate 38 of the filter support 6, even if the bottom plate 38 of the filter support 6 is inclined, the filter has a flat bottom plate. The filter of the usual commercially available structure which makes | forms can be used, and it can implement at low cost. Also, the packing 49 is attached to the side plate 43 of the filter 7 instead of the side surface of the filter support 6 so as to be airtight with the inner surface of the side plate 24 of the filter case 5, and the width of the filter 7 is made narrower than before. can do.
[0028]
When implementing this invention, the structure which attaches the said duct 4 to the side wall of the cab 1 and installs a filter toward the side wall side is also employable. Further, the structure in which the bottom plate 26 of the filter case 5 is inclined can also be adopted in a structure that does not use the filter support 6.
[0029]
【The invention's effect】
According to the first aspect of the present invention, since the packing for maintaining airtightness between the inner surface of the filter case and the filter is attached to the filter or the filter side member, the filter is removed by removing the filter or the filter and the filter side member. It can be taken out of the case, and the packing can be easily replaced.
[0030]
In addition, the packing enables the outside to be removed, the bottom plate of the filter case is inclined so that the outside is lowered, and the dust discharge part is provided at the lower part of the duct, so that dust accumulated on the bottom plate of the filter case can be removed. It can be easily discharged from the discharge port along the slope, and cleaning becomes easy.
[0031]
Further , since the bottom plate of the filter case and the bottom plate of the filter support are inclined in the same direction, and the packing is attached to the lower surface of the bottom plate of the filter case, the packing is uniformly compressed on the upper surface of the bottom plate of the filter case and has good airtightness. Sex is maintained.
[0032]
According to the second aspect of the present invention, the filter can be a commercially available filter having a flat base plate and can be implemented at a low cost. In addition, the packing is attached to the side plate of the filter instead of the side surface of the filter support to achieve airtightness with the inner surface of the side plate of the filter case, and can be implemented without reducing the width of the filter.
[Brief description of the drawings]
FIG. 1 is a side view of a cab of a construction machine showing an embodiment of a filter mounting structure according to the present invention.
FIG. 2 is a longitudinal sectional view of a duct according to the present embodiment.
3A is a longitudinal sectional view of a filter case of the present embodiment, and FIG. 3B is a plan view thereof.
FIG. 4 is a longitudinal sectional view showing a filter mounting structure of the present embodiment.
5A is a plan view showing a filter mounting structure of the present embodiment, and FIG. 5B is a cross-sectional view taken along the line DD of FIG.
6A and 6B are a plan view and a rear view, respectively, of the filter support according to the present embodiment.
7A is a side view of the filter support according to the present embodiment, and FIG. 7B is a cross-sectional view taken along line E-E.
FIGS. 8A, 8B, and 8C are a front view, a side view, and a plan view of a filter according to the present embodiment, respectively.
FIG. 9 is a longitudinal sectional view showing a conventional filter mounting structure.
[Explanation of symbols]
1: cab, 2: air conditioner unit, 2a: outside air introduction device, 3: rear wall, 4: duct, 5: filter case, 6: filter support, 7: filter, 9: inner plate, 11: screw, 12: Nut, 13: outer plate, 14, 16: opening, 15: current plate, 17: bottom plate, 18, 19: outlet, 20: nut, 22: outer plate, 23: inner plate, 24: side plate, 25: Top plate, 26: bottom plate, 27: opening, 28: flange, 29: slit, 30: screw, 32: opening, 33: packing, 34: nut, 35: connection port, 36: guide plate, 37: Side plate, 38: bottom plate, 38a: extending portion, 39, 40: packing, 41: mounting plate, 42: mounting hole, 43: side plate, 44: bottom plate, 45: top plate, 47: locking claw, 49: packing , 50: handle, 51: screw

Claims (2)

In the mounting structure of the outside air introduction filter for an air conditioner attached to the cab of the construction machine,
Provided inside the operator's cab a filter case that accommodates the filter, and the bottom plate of the filter case is inclined so that the outside is lowered,
In the lower part of the duct that protrudes to the outside in the cab, a discharge port for discharging dust accumulated on the bottom plate of the filter case is provided,
The filter includes a filter support that is externally fitted to the filter, and includes a packing that maintains airtightness between the side surface and bottom surface of the filter and the filter case on the filter side,
Removably attach the filter from the opening provided in the filter case,
Inclining the bottom plate of the filter support in the same direction as the bottom plate of the filter case,
An air conditioner outdoor air introduction filter mounting structure , wherein a packing for mounting on the upper surface of the bottom plate of the filter case is attached to the lower surface of the filter support plate . In the mounting structure of the outside air introduction filter for an air conditioner according to claim 1 ,
The filter support has side plates and a bottom plate on both sides,
The filter has a structure in which a filter body is fixed to a frame composed of a top plate, a side plate, and a bottom plate,
The bottom plate of the filter support has a portion that protrudes outward from the lower side of the side plate of the filter support, and a packing is attached to the upper surface of the bottom plate of the filter support;
The filter and the filter support have a structure that is detachably mounted from an opening provided in a top plate of the filter case,
The width of the side plate of the filter support is narrower than the width of the side plate of the filter, and a part of the side plate of the filter is protruded from the side plate of the filter support toward the outside of the cab,
Pasting the packing on the lower surface of the bottom plate of the filter corresponding to the protruding portion of the side plate of the filter outward and the protruding portion of the side plate,
The filter case and the filter are mounted by placing the packing on the lower surface of the bottom plate of the filter on the packing on the upper surface of the bottom plate of the filter support, and bringing the packing of the side plate of the filter into contact with the inner surface of the side plate of the filter case. Mounting structure of outside air introduction filter for air conditioner.

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