JP4824416B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner installed in a cab in a construction machine such as a hydraulic excavator.

Conventionally, as this type of air conditioner, for example, one having a configuration as disclosed in Patent Document 1 has been proposed. That is, in this conventional apparatus, a base is fixed on the floor board of the cab, and a driver's seat is installed on the base. A device body of an air conditioner is disposed behind the driver's seat, and an air conditioning mechanism including an evaporator and a blower fan for generating temperature-adjusted air is provided in the device body. A duct projects forward through the lower space of the driver's seat at the front of the apparatus main body, and a foot outlet for blowing air toward the driver's feet is formed at the front end. The duct has a foot outlet opening obliquely upward, and air is blown obliquely upward from the foot outlet, so that the accumulation of dust accumulated on the floor surface of the cab is suppressed. It has become so.
JP 2005-186768 A

  However, in this conventional air conditioner, the device main body is disposed behind the driver's seat, and the duct is provided in the lower space of the driver's seat, so that the space in the lower space can be used effectively. As a result, the cabin space in the cab was narrowed and the living comfort was poor.

  Further, since the duct passes through the lower space of the driver's seat while being lifted from the floor surface, the duct is provided with a bent portion so that air is blown obliquely upward from the foot outlet and opened obliquely upward. The process was complicated.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide an air conditioner that can secure a large space in the cab.

In order to achieve the above object, according to the present invention, an air conditioner main body is provided on a floor surface in a lower part of a driver's seat, and the air conditioner main body is directed toward the front of the operator's cab at a position spaced upward from the floor surface. The air conditioner main body is provided with a blower opening, and the air conditioner main body is provided with a blower passage, and the front end of the blower passage is communicated with the blower outlet formed in the main body case. A lower side guide that is provided with a water receiving ridge extending along the lower edge of the air outlet and is inclined upwardly toward the air outlet on both the inner bottom surface and the inner upper surface of the air passage inside the air outlet. A plate and an upper side guide plate are provided , the lower side guide plate is provided so as to be connected to the inner wall of the ridge, and the upper side guide plate is provided above the ridge .

  Therefore, even if the air passage is arranged on the floor surface, the air is smoothly raised and guided along the guide plate from the air passage and blown out from the air outlet. Therefore, the air conditioning mechanism can be disposed close to the floor surface of the cab. Therefore, as a result, the air conditioning mechanism can be arranged in a narrow space of the driver's seat, and a wide space can be secured in the driver's cab. Moreover, since the air outlet is opened at a position spaced upward from the floor surface, it is possible to prevent water from entering the air passage from the air outlet when the floor surface of the cab is washed with water.

In addition, even when water enters from the air outlet when washing the floor surface, the water can be received by the water receiving basin, and the risk of water entering the inner part of the air passage is prevented. Can do.

  Furthermore, in the said structure, it is good to arrange | position the air-conditioning mechanism containing an evaporator and a ventilation fan in a ventilation path. When configured in this way, an air conditioning mechanism including an evaporator and a blower fan can be placed close to the floor surface of the lower part of the driver's seat along with the air passage, and a wider space can be secured in the driver's cabin. it can.

  Furthermore, in the said structure, it is good to provide the draining surface which faces an air flow in the lower part of the air introduction part of a ventilation path. When comprised in this way, when air is taken in in the ventilation path from the air introduction part side, the water contained in the air is removed by the draining surface. Therefore, a possibility that water may enter the air passage from the air introduction unit side can be suppressed.

  In addition, if the air introduction port of the air passage is provided at a position spaced upward from the floor surface, water can be prevented from entering from the air introduction port during washing, and dust on the floor surface can be prevented from entering the air passage. Inhalation can be suppressed.

  If a water receiving trough extending along the lower edge of the air introduction port is provided below the air introduction port of the air passage, it is possible to more effectively prevent water from entering during washing.

  As described above, according to the present invention, the air-conditioning mechanism can be disposed close to the floor surface of the cab, and the air-conditioning mechanism can be disposed in a narrow space of the driver's seat. As a result, a large space can be secured in the cab.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 5, in a cab 21 of a construction machine, a frontal substantially flat inverted U-shaped base made of a steel plate is provided on a floor surface 22 on which a floor mat M (shown in FIG. 8) is laid. The base 23 is fixed by a plurality of bolts 24, and a pair of air introduction side through holes 23a and one air outlet side through hole 23b are formed on both side walls thereof. A pair of support pieces 25 extending in the front-rear direction are fixed to the upper surface of the base 23, and a support plate 27 is supported on the support pieces 25 via a pair of rails 26 so as to be movable in the front-rear direction. A driver's seat 28 is installed on the support plate 27 so as to be movable up and down via an elevator mechanism (not shown). A bellows-like cover 29 is attached to the outer periphery of the elevator mechanism. A plurality of operation pedals 30 and operation levers (not shown) are provided on the floor 22 in front of the driver seat 28.

  As shown in FIGS. 1 to 3, an air conditioner main body (hereinafter simply referred to as an apparatus main body) 31 is disposed in a space formed on the floor surface 22 inside the base 23 at the lower part of the driver seat 28. A main body case 31 a of the apparatus main body 31 is fixed to the floor surface 22 by a plurality of bolts 32. An air passage 33 is formed in the main body case 31 a of the apparatus main body 31 by the apparatus main body 31 and a plurality of partition walls 34. As shown in FIG. 4, an indoor air introduction port 35 communicating with the air introduction side of the air passage 33 is formed on the left side surface of the apparatus main body 31 so as to correspond to the air introduction side through hole 23 a on the left side surface of the base 23. Is formed away from the floor surface 22 upward. At the lower part inside the indoor air introduction port 35, a water receiving ridge 83 extending along the lower edge of the indoor air introduction port 35 is formed in the apparatus main body 31, and a drain hole 84 is formed at the end of the ridge 83. Is formed. Since the indoor air introduction port 35 is located higher than the floor surface 22, when the floor surface 22 and the floor mat M are washed with water, water enters the air passage 33 from the indoor air introduction port 35. In addition to being suppressed, even if water enters from the indoor air introduction port 35, the water is received by the water receiving trough 83 and then discharged from the drain hole 84 onto the floor surface 22. ing.

  As shown in FIG. 3, a support frame 36 is attached to the opening outer peripheral surface of the indoor air introduction port 35, and an air filter 37 having a knob portion 37a at the front end is inserted into and supported by the support frame 36 so that it can be pulled out forward. ing. As shown in FIG. 1, a front-side substantially inverted L-shape is formed between the floor surface 22 and the base 23 so as to cover the outer front half of the indoor air introduction port 35 on the left side of the apparatus main body 31. A side cover 38 is disposed and fixed to the floor surface 22 with a plurality of bolts 39.

  As shown in FIGS. 3, 6, and 7, the left rear surface of the main body case 31 a of the apparatus main body 31 communicates with the air introduction side of the air passage 33 (the position on the upper side of the shaft portion of the blower fan 49 described later). The outdoor air introduction port 40 which makes the short cylinder shape as an air introduction part to perform is formed. An air introduction duct 41 for introducing air from the outside is connected to the front end (rear end) of the outdoor air introduction port 40 via a packing 42. The packing 42 is provided with an outer seal portion 42 a disposed on the outer surface of the upper wall and both side walls of the outdoor air introduction port 40, and an inner seal portion 42 b disposed on the inner surface of the lower wall of the outdoor air introduction port 40. Yes. In order to allow passage from the upper side of the air introduction duct 41 on the outer peripheral side of the outer seal portion 42a of the packing 42 (movement from the solid line position to the two-dot chain line position in FIG. 6) on the lower surface of the front end of the air introduction duct 41. A notch 41a is formed. Therefore, as shown in FIG. 6, the outer seal portion 42 a of the packing 42 is moved to the air introduction duct 41 by moving the air introduction duct 41 downward in a state where the air introduction duct 41 is disposed above the outdoor air introduction port 40. Is inserted through the notch 41a. Thereby, as shown by a chain line in FIG. 6, the air introduction duct 41 is externally connected to the outdoor air introduction port 40 via the packing 42 in an airtight state.

  As shown in FIGS. 3 and 6, a draining surface 43 is formed on the main body case 31a on the lower inner surface of the outdoor air introduction port 40 so as to incline downward. A partition wall 44 is formed in the vicinity of the rear end of the lower inner surface of the outdoor air introduction port 40, and a water receiving portion extending along the lower edge of the outdoor air introduction port 40 is formed between the partition wall 44 and the draining surface 43. A collar 45 is formed. And when outdoor air is taken in into the ventilation path 33 from the outdoor air introduction port 40 via the air introduction duct 41, the water draining surface 43 faces an air flow, so that the water contained in the air is drained by the water draining surface 43. Is separated and removed. Further, after the separated and removed water is guided into the jar 45, it is discharged onto the floor surface 22 from a drain hole 46 formed at the end of the jar 45.

  As shown in FIG. 3, a blower fan 49 constituting an air conditioning mechanism 48, an evaporator 50 of a refrigeration circuit (not shown), and a heater 51 are disposed in the blower passage 33 of the apparatus main body 31. The condenser, the compressor, and the like of the refrigeration circuit are disposed outside the cab 21.

  As shown in FIGS. 1 to 3 and 8, air is blown to the front right side of the main body case 31 a of the apparatus main body 31 so as to open toward the front of the cab 21 at a position spaced upward from the floor surface 22. A foot vent 55 for communication with the air outlet side of the passage 33 is formed.

  A front cover 56 is disposed at the front ends of the base 23 and the side cover 38 so as to cover the front surface of the apparatus main body 31, and is fixed to the base 23 by a plurality of bolts 57 at the upper edge. A foot air outlet 60 is formed on the front right side of the front cover 56 so as to correspond to the foot air blowing port 55. A filter attachment / detachment hole 61 for attaching / detaching the air filter 37 to / from the indoor air inlet 35 of the apparatus main body 31 is formed on the left side of the front surface of the front cover 56, and a lid 62 can be opened and closed in the filter attachment / detachment hole 61. It is attached.

  As shown in FIGS. 3 and 8, a water receiving ridge 63 extending along the lower edge of the air blowing port 55 is formed in the main body case 31 a at the inner lower portion of the foot air blowing port 55. A drain hole 64 is formed at the end. Between the inner wall of the flange 63 and the inner bottom surface of the air passage 33, a lower side guide plate portion 65 that is inclined upward toward the foot air blowing port 55 is provided. Further, an upper guide plate portion 65 a is formed between the inner upper portion of the foot vent 55 and the inner upper surface of the air passage 33 so as to correspond to the guide plate portion 65. And the air of the predetermined temperature produced | generated by the air-conditioning mechanism 48 is moved up along the guide plate parts 65 and 65a from the inside of the ventilation path 33, and the operation pedal 30 vicinity from the foot air outlet 55 and the foot air outlet 60 It comes to be blown out towards. Further, when the foot air outlet 60 and the foot air outlet 55 are opened at positions spaced upward from the floor surface 22, when the floor surface 22 and the floor mat M are washed with water, the foot air outlet port is provided. Intrusion of water into the air passage 33 from the air outlet 55 for foot and the foot 55 is suppressed. Furthermore, even when water intrudes from the foot air outlet 60 and the foot air outlet 55 when the floor surface 22 and the floor mat M are washed with water, after the water is received by the water receiving basin 63, The water is drained from the drain hole 64 onto the floor surface 22.

  As shown in FIGS. 2, 3, and 9, corresponding to the air outlet side through hole 23 b on the right side surface of the base 23, the air in the air passage 33 is formed in the right front portion of the body case 31 a of the apparatus body 31. A short cylindrical duct side air outlet 66 communicating with the outlet side is formed.

  As shown in FIGS. 2, 3, and 9 to 11, an air outlet duct 68 is provided in the duct-side air outlet 66 of the apparatus main body 31 via an air outlet-side through hole 23 b on the right side wall of the base 23. It is connected. Between the outer peripheral edge of the air outlet side through hole 23b of the base 23 and the opening edge of the duct side air blowing port 66 and the opening edge of the air outlet duct 68, packings 69 made of a flexible elastic material such as foamed synthetic resin are respectively provided. It is intervened. That is, a square annular packing 69 as shown in FIG. 10 is bonded and fixed to the outer end surface of the duct side air blowing port 66 of the apparatus main body 31 and the outer peripheral edge of the connection port 68a of the air outlet duct 68. As shown in FIG. 11, when the apparatus main body 31, the base 23, and the air outlet duct 68 are assembled on the floor surface 22, the air outlet side through hole 23 b of the base 23 is sandwiched between the apparatus main body 31 and the base body 23. The apparatus main body 31 and the air outlet duct 68 are pressed and moved relative to the base 23 in a direction in which the duct side air outlet 66 and the connection port 68a of the air outlet duct 68 approach each other. As a result, as shown in FIG. 9, both packings 69 are compressed and deformed and joined to each other via the air outlet side through hole 23b of the base 23, and the open end surface of the air outlet side through hole 23b. Is coated. Therefore, the duct side air blowing port 66 of the apparatus main body 31 and the connection port 68a of the air outlet duct 68 are connected in an airtight state, and the paint on the opening end surface of the air outlet side through hole 23b of the base 23 made of metal. Delamination and corrosion are controlled. The packing 69 may be bonded to the edge of the air outlet side through hole 23b of the base 23 instead of being bonded to the apparatus main body 31 and the air outlet duct 68.

  As shown in FIG. 1, in the driver's cab 21, on the right front side of the driver's seat 28, the air outlet 70 for blowing air toward the driver's upper body and the air toward the driver's upper body and feet. A blower outlet 71 for blowing air to the front window of the cab 21 and circulating air in the room or preventing fogging of the front window is provided. In the cab 21, at the rear part of the driver's seat 28, an air outlet 73 is provided for blowing air to the rear window of the cab 21 to prevent fogging of the rear window. The air outlet ducts 68 are connected to the air outlet ducts 70 to 73, and air blowing from the outlets 70 to 73 is executed or stopped by an air blowing switching plate (not shown) provided in the air outlet duct 68. It can be switched to either.

Next, the operation of the air conditioner configured as described above will be described.
For example, in FIG. 3, air introduced from the inside and outside of the room passes through an evaporator and a heater and is blown out toward the driver's feet near the operation pedal 30 by a blower. In this case, as shown in FIG. 8, the foot air outlet 55 and the foot air outlet 60 are opened forward at a position spaced upward from the floor surface 22. Since the guide plate portions 65 and 65a are provided at the lower portion and the upper portion, the air is smoothly guided to rise along the guide plate portions 65 and 65a from the inside of the air blowing path 33, and the foot air outlet 55 and the foot air blow. It is blown out quietly from the exit 60 forward with almost no loss.

  Therefore, even if it arrange | positions in the low position so that the air-conditioning mechanism 48 may be located in the floor surface 22 side, a ventilation function can be exhibited effectively. Therefore, since the air conditioning mechanism 48 can be installed at a low position, the apparatus main body 31 can be arranged in a narrow space below the driver's seat 28. For this reason, unlike the conventional configuration in which the air conditioner main body is arranged in the rear part of the driver's seat in the driver's cab, a large space can be secured in the driver's cab 21, and living comfort can be improved. It is also possible to reduce the size.

  In addition, as shown in FIG. 6, a water draining surface 43 that faces the air flow is formed at the lower part of the outdoor air introduction port 40, so that when air is taken into the air passage 33 from the outdoor air introduction port 40. The water contained in the air is removed by the draining surface 43. Then, the water is discharged out of the apparatus main body 31 from the jar 45 through the drain hole 46. Therefore, it is possible to reliably suppress the possibility of water entering the air passage 33 from the outdoor air introduction port 40.

  As in the case described above, air at a predetermined temperature is generated by the air-conditioning mechanism 48, and the air is sent out from the air passage 33 through the duct side air outlet 66 into the air outlet duct 68. Thereafter, according to the switching state of a ventilation switching plate (not shown) provided in the air outlet duct 68, the air is guided to any of the outlets 70 to 73 disposed in front of or behind the driver seat 28, It blows out from the blower outlets 70-73.

  Furthermore, when the floor surface 22 of the cab 21 is washed with water, the indoor air introduction port 35, the foot air blowing port 55, and the foot air blowing port 60 are opened at positions spaced upward from the floor surface 22. Intrusion of water into the air passage 33 from the indoor air introduction port 35, the foot air outlet 60, and the foot air blowing port 55 can be suppressed. In addition, since water receiving ridges 63 and 83 are provided at the inner lower portions of the indoor air introduction port 35 and the foot air blowing port 55, respectively, even when the floor surface 22 and the floor mat M are washed with water, the foot air blowing is performed. Even if water enters from the outlet 60 and the foot vent 55, the water can be received by the eaves 63 and 83 and can flow from the drain hole 64 onto the floor surface 22. Therefore, the possibility that water may enter the air passage 33 can be more reliably suppressed. Thus, since the possibility that water may enter the air blowing path 33 can be suppressed, the malfunction of the air conditioning mechanism 48 due to water can be prevented, and the indoor air introduction port 35 is located at a high place, so that the floor surface Inhalation of dust, earth and sand, etc. on 22 can be suppressed, and the malfunction of the air-conditioning mechanism 48 can be further prevented.

  Furthermore, as shown in FIG. 9, since the packing 69 is interposed between the duct side air outlet 66 and the air outlet duct 68 of the apparatus main body 31, it is possible to prevent air-conditioning air from leaking between the 66 and 68. Since the opening end surface of the air outlet side through hole 23b of the base 23 is covered by the packing 69, dew condensation or the like on the opening end surface of the air outlet side through hole 23b is prevented, and paint peeling and corrosion are suppressed. In addition, since the opening end surface of the air outlet side through hole 23b is covered and protected only by pressing and deforming the packing 69, not only the configuration is simple but also the duct 23 from the duct side air outlet 66 of the apparatus main body 31 The opening area reaching the connection port 68a of the air outlet duct 68 through the air outlet side through hole 23b can be increased, and the air blowing efficiency can be improved. On the other hand, when the packing is supported on the apparatus main body 31 or the air outlet duct 68 via a bracket and the packing is applied to the opening edge of the air outlet side through hole 23b of the base 23, the bracket However, the structure becomes complicated and the troublesome man-hours of aligning the packing with the air outlet side through hole 23b of the base 23 increases, and the packing protrudes toward the air outlet side through hole 23b. There is a possibility that the bracket is positioned in the air outlet side through hole 23b or the opening area of the air outlet side through hole 23b becomes narrow.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
The air conditioning mechanism 48 is disposed on the floor 22 at the rear of the driver's seat 28, and the air passage 33 connected to the air conditioning mechanism 48 is disposed on the floor 22 at the lower portion of the driver's seat 28.

A water draining surface facing the air flow is provided below the indoor air inlet 35 of the air passage 33.
(Other technical ideas)
Other technical ideas other than the technical idea described in the claims ascertained from the embodiment are as follows.

  (1) In the connection structure of a plurality of openings (23b, 66, 68b) connected via the packing (69), packing interposed between the edges of adjacent openings (23b, 66, 68b) A structure for connecting to an opening characterized in that the packing is deformed by pressing at the edge of the opening (23b, 66, 68b), and the end face of the opening (23b) is covered with the packing.

  (2) Another opening (66, 68a) is connected to one opening (23b) from both sides via packings (69), and the one opening (23b) is connected by both packings (69). The opening connection structure according to item (1), wherein the end surface of the opening is covered.

  If comprised as mentioned above, while only covering the packing (69), the end surface of the opening part (69) can be covered, the structure for that can be simplified, and a wide opening area can be secured.

The perspective view which shows the cab of the construction machine provided with the air conditioner of one Embodiment. The principal part perspective view which shows the apparatus main body of the air conditioner of FIG. Similarly the expanded cross-sectional view of the apparatus main body of an air conditioner. The fragmentary sectional view which expands and shows the air introduction part of the apparatus main body side part of an air conditioner. The perspective view which shows the base which covers the apparatus main body of an air conditioner. The fragmentary sectional view which expands and shows the air introduction part of the apparatus main body rear part of an air conditioner. Sectional drawing in the 7-7 line | wire of FIG. Sectional drawing which expands and shows the part of the ventilation opening of the apparatus main body of an air conditioner The fragmentary sectional view which expands and shows the blowing duct connection part of the apparatus main body of an air conditioner. The perspective view which shows the packing used for the blowing duct connection part of FIG. The fragmentary sectional view which shows the assembly | attachment process of the blowing duct connection part of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Driver's cab, 22 ... Floor surface, 23 ... Base, 28 ... Driver's seat, 31 ... Main body of air conditioner, 33 ... Air blower, 35 ... Indoor air inlet, 40 ... Outdoor air introduction as an air introduction part Mouth, 41 ... Air introduction duct, 43 ... Draining surface, 45 ... Hot, 48 ... Air conditioning mechanism, 49 ... Blower fan, 50 ... Evaporator, 51 ... Heater, 55 ... Blower for foot, 56 ... Front cover, 60 ... Foot Air outlet, 63 ... ６３, 65 ... guide plate portion, 66 ... duct side air outlet, 83 ... 樋.

Claims (5)

An air conditioner body is installed on the floor below the driver's seat,
The air conditioner main body includes a main body case in which an air outlet opening toward the front of the cab is formed at a position spaced upward from the floor surface,
The air conditioner main body is provided with an air passage, and the front end of the air passage is communicated with the air outlet formed in the main body case.
Providing a trough for receiving water that extends along the lower edge of the air outlet adjacent to the inner surface of the main body case,
A lower side guide plate and an upper side guide plate that are inclined upward toward the air blowing port are provided on both the inner bottom surface and the inner upper surface of the air blowing path inside the air blowing port, respectively .
An air conditioner for a construction machine, wherein the lower guide plate is provided so as to be connected to the inner wall of the cage, and the upper guide plate is provided above the cage. The air conditioner for a construction machine according to claim 1, wherein an air conditioning mechanism including an evaporator and a blower fan is disposed in the air passage. The air conditioner for a construction machine according to claim 1 or 2 , wherein a water draining surface facing the air flow is provided at a lower portion of the air introduction portion of the air passage. The air conditioner according to any one of claims 1 to 3 , wherein an air introduction port of the air passage is provided at a position spaced upward from the floor surface. 5. The water receiving trough extending along a lower edge of the air introduction port is provided at a lower portion of the air introduction port of the air passage, according to any one of claims 1 to 4. The air conditioner described.

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