JPH09315138A - Air conditioning device for cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit a cooler unit and a capacitor to a cab having a rotary front window without hindering the appearance of the cab and without generating a trouble by integrally providing the cooler unit and the capacitor in a rear side of a roof skylight of a front part so as to be housed within a range of the ceiling in a top surface of the ceiling of the cab. SOLUTION: A cooler unit 14 of an air conditioning device for adjusting the air inside of a cabin of a cab 10 and a capacitor 15 for liquidizing the coolant in the gas condition with the forced cooling are integrally formed in a rear side of a roof skylight 22, which is formed in a front part of a ceiling 21, in a top surface part of a ceiling 21 of the cab 10 so as to be housed in a range of the cab ceiling. A window hole for opening an adjusted air blowing port 24 inside of a cabin of the cap 10 is opened at a position of the ceiling 21 corresponding to the adjusted air blowing port 24 of the cooler unit 14. An air conditioning device can be installed in a top surface of the ceiling 21 of the cab 10 so as to be unified with the cab 10 without hindering the appearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner installed mainly in a cab for a construction machine such as a hydraulic excavator and a working vehicle.

[0002]

2. Description of the Related Art FIG. 10 is a schematic side view of a cabin 1 described in Japanese Utility Model Laid-Open No. 5-74919. FIG.
At 0, a roof 3 is provided on the upper part of the cabin frame 2, and the roof 3 is configured in the middle by fixing an upper outer roof 4 and a lower inner roof 5 via a seal, It has a space inside. The air conditioner device 6 is arranged in this space. The inside / outside air switching damper 7 is automatically opened / closed by a servomotor to automatically control the air conditioning in the cabin of the cabin 1.

[0003]

Generally, construction machines such as hydraulic excavators and work vehicles are equipped with an air conditioner as an optional equipment or a standard equipment. In the cabin according to the embodiment of the related art shown in FIG.
In the non-equipped state, the space between the outer roof 4 and the inner roof 5 exists unnecessarily, and the total height of the cabin 1 is high, so it cannot be said that the manufacturing cost is economical. Also, the means for disposing the drain discharge conduit leading out from the air conditioner is not described. There is also a work vehicle of this type in which the front window is flipped up to the lower surface side of the roof above the driver's seat to be housed by rotating (manually or electrically), and the front side of the cabin is opened. When the windshield having such a structure is flipped up and rotated, the windshield in that state obstructs the passage of air blown out from the air outlet or the air outlet duct. The present invention, on the upper surface of the ceiling of the cabin (cab),
A cab air conditioner for a construction machine, which is mounted without impairing the appearance of the cab, has sufficient drain discharge means, and is mounted on a cab that has a flip-up rotary storage type front window without hindrance. The purpose is to provide.

[0004]

According to the present invention, a cooler unit of an air conditioner for adjusting the air in a cab room and a condenser for liquefying a refrigerant in a gas state by forced cooling are provided.
On the upper surface of the ceiling of the cab, the rear side of the skylight formed at the front of the ceiling is integrally arranged so as to be within the range of the ceiling of the cab in a plan view. In the above case, a window hole is opened at the position of the ceiling corresponding to the adjusted air outlet of the cooler unit to open the adjusted air outlet to the inside of the cab. Further, the outer peripheral side extending from the cooler unit to the condenser was covered with a cover, and the cover was integrally fixed to the cab. Further, a cover plate capable of closing the window hole is detachably attached to the window hole of the cab when the air conditioner is not installed.

By assembling the air conditioner to the cab as described above, the air conditioner can be installed on the upper surface of the cab ceiling without giving a bad appearance to the cab and providing a sense of unity with the cab. Further, since the air conditioner does not occupy a part of the cab indoor space, it is possible to effectively utilize the narrow living space in the cab room. Further, since the air blown out from the ceiling side is blown toward the driver, the driver can get the effect of head cold foot heat, and can perform effective and healthy air conditioning. Further, since the air conditioner is easily attached to the upper surface of the ceiling, so-called post-installed optional equipment can be easily and quickly installed.
When the cab is not equipped with an air conditioner, a cover plate is attached to the above-mentioned window hole in the ceiling, and the window hole is closed. As a cab equipped with a device, its manufacturing cost can be reduced.

Further, in the present invention, in order to discharge the drain drawn out from the cooler unit, drain pipes are arranged in two directions of a front side and a rear side of the cab, and are arranged in a direction toward the front side. As a part of the drain piping, a pipe-shaped handrail provided near the entrance of the cab and used by the driver to assist in getting on and off was used. Further, the drain pipe arranged in the rear side direction is vertically piped along the outer peripheral surface portion on the rear side of the cab, and as one example of the piping means, a vertical recessed portion is formed on the outer peripheral surface portion on the rear side of the cab. Was formed, the drain pipe on the rear side was piped in the recess, and a cover was provided in the piped recess.

Among the drain pipes arranged as described above, those which are arranged on the front side of the cab are used in plan view, and those which are installed on the front left side of the cab using the handrail for entrance and exit, and those which are arranged on the rear side are shown in plan view. It is provided near the corner on the right rear of the cab. Therefore, when the machine body is tilted to the front side or the left side during the operation of the construction machine, the drain is discharged through the pipe on the front side, and when the machine body is tilted to the rear side or the right side, the drain is discharged through the pipe on the rear side. Since the handrail is used for a part of the front side pipe, the pipe can be used also as a pipe to slightly reduce the pipe construction cost and maintain the appearance. Also, connect drain piping to the recess formed on the outer peripheral surface on the rear side of the cab,
Since the cover is provided in the recessed portion where the pipe is formed, it is possible to prevent the drain pipe from colliding with an external obstacle and to maintain the appearance.

The cab according to the present invention is a cab in which the front window is moved and stored on the lower surface side of the ceiling when the front window is open, and the front window is detachably formed to adjust the cooler unit. The passage for the air blown from the air outlet is opened. As another means for opening the passage of the blown air, the glass plate of the front window is formed into a plurality of sash type glass plates which can be moved within the window frame of the front window, and the sash type glass plate is opened. I tried to operate it. Further, as another second embodiment opening means, at least a part of the glass plate of the front window is formed so that it can be detached, and that part of the glass plate is detachably operated. Further, as another third embodiment opening means for the passage of the blown air, another adjusted air outlet communicating with the adjusted air outlet is provided at a fixed portion other than the upper position of the accommodation state position of the front window. Therefore, when the front window of the cab is open, the air blown out from the adjustment air outlet can be blown to the driver without any trouble.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a construction machine (small hydraulic excavator in this embodiment) equipped with an air conditioner of the present invention. In the figure, 8 is a lower traveling body of a small hydraulic excavator, 9 is an upper revolving body provided on the upper portion of the lower traveling body 8 so as to be freely rotatable, 10 is a cab for the cab mounted on the upper revolving body 9, and 11 is A door that is hinged to the entrance and exit of the cab 10 so that it can be opened and closed, and 12 is a pipe material (material such as steel pipe)
A handrail for assisting passengers to get in and out of the cab, 13 a front window that is openably and closably provided on the front surface of the cab 10, 14 is a cooler unit of an air conditioner, 15 is a condenser, 16 is the cooler unit 14 to the condenser 15 The cover 17 covers the outer peripheral side of the drain pipe 17, 17 is a drain pipe on the front side for circulating and discharging the drain drawn out from the cooler unit 14, and 18 is a drain pipe on the rear side. FIG. 2 is a plan view of the upper swing body 9 of FIG. 1 viewed from A, but the cover 16 is in a detached state. In the drawing, 19 _a , 19 _b , 19 _c , and 19 _d are drain outlet port pipes provided in four directions of the cooler unit 14, 20 is a drain drain communication pipe, and 21 is an upper portion of the cab 10. A ceiling, 22 is a skylight provided in the front part of the ceiling 21 and provided with a transparent plate for a driver to visually observe the oblique upper front side, and 23 is a window hole opened in the ceiling 21. FIG. 3 is a plan view showing the upper swing body 9 in a state where the air conditioner is not equipped. In the figure, 29 is a cover plate.

FIG. 4 is a side view of a partial cutaway main part of the upper swing body 9 in FIG. In the figure, reference numeral 24 is an adjusting air outlet of the cooler unit 14, 25 is a roller provided on each of the upper and lower side surfaces of the front window 13, and 26 is a roller provided on the left and right inner wall surfaces of the cab 10. It is a guide rail for guiding. FIG. 5 is a front view showing the cooler unit 14 as seen from B of FIG. FIG.
FIG. 9 is a cross-sectional plan view of a main part of a modified example of a C part in FIG. 2.
In the figure, 10 'is a cab, 18' is a rear side drain pipe, 20 'is a drain drain communication pipe, and 27 is a cab 1
The outer peripheral surface of 0'is a recess formed in the vertical direction, and 28 is a cover attached to the recess 27.

Next, an example of an embodiment of the air conditioner for the cab 10 of the present invention will be described with reference to FIGS. In the present embodiment, a cooler unit 14 of an air conditioner that adjusts the air in the room of the cab 10 and a condenser 15 that liquefies a gaseous refrigerant by forced cooling are provided on the upper surface of the ceiling 21 of the cab 10 on the ceiling 21. Skylight 22 formed in the front
It is arranged integrally with the rear side of the so as to fit within the range of the ceiling of the cab in a plan view. In the above case, a window hole 23 that opens the adjusted air outlet 24 into the cabin 10 is opened at the position of the ceiling 21 corresponding to the adjusted air outlet 24 of the cooler unit 14. Further, the outer peripheral side extending from the cooler unit 14 to the condenser 15 was covered with a cover 16, and the cover 16 was integrally bolted to the cab 10. Further, a cover plate 29 capable of closing the window hole is detachably attached to the window hole 23 of the cab 10 when the air conditioner is not equipped.

In order to discharge the drain drawn out from the cooler unit 14, drain pipes 17 and 18 are respectively arranged in two directions of a front side and a rear side of the cab 10, and the drain pipes 17 and 18 are directed toward the front side. As a part of the drain pipe 17 provided, a pipe-shaped handrail 12 provided near the entrance / exit of the cab 10 (that is, near the door 11 shown in FIGS. 1 and 4) and grasped by the driver for assisting getting on / off is used. I was there. In addition, the drain pipe 18 arranged in the direction of the rear side is shown in FIG.
As shown in FIG. 5, pipes were vertically arranged along the outer peripheral surface portion on the rear side of the cab 10. Further, the drain pipe 18 on the rear side is provided.
As another embodiment of piping means, as shown in FIG.
On the outer peripheral surface on the rear side of 0 ', a drain pipe 18' on the rear side is provided in a recess 27 in the vertical direction, and a cover 28 is provided on the recess 27 thus piped.

Next, the operation of the air conditioner for the cab 10 of the present invention will be described. In this embodiment, the air conditioner is installed on the upper surface of the ceiling 21 of the cab 10 by attaching the air conditioner to the cab 10 as described above so as to have a sense of unity with the cab 10 without spoiling the appearance. can do. Further, since the air conditioner does not occupy a part of the indoor space of the cab 10, it is possible to effectively utilize the narrow living space in the cab 10. Further, since the blown air is blown toward the driver from the side of the ceiling 21, the driver can get the effect of head cold foot heat, and can perform effective and healthy air conditioning. Further, since it is easy to assemble the air conditioner to the upper surface of the ceiling 21, so-called post-installed optional equipment can be easily and quickly provided. Further, when the cab 10 is not equipped with the air conditioner, the cover plate 29 is attached to the window hole 23 of the ceiling 21 and the window hole 23 is closed.
The total height of 0 can be kept low, and the production cost can be reduced as a cab equipped with an air conditioner.

Further, among the drain pipes of the cooler unit 14, the drain pipe 17 provided on the front side of the cab 10 is used.
As shown in FIG. 2, a front entrance left and right handrail 12 of the cab 10 is used, and a rear drain pipe 18 is provided near a corner on the rear right side of the cab 10 in plan view. Therefore, when working with a small hydraulic excavator, the drain is discharged through the drain pipe 17 on the front side when the machine leans to the front side or the left side, and through the drain pipe 18 on the rear side when the machine leans to the rear side or the right side. To be done. Since the handrail 12 is used for a part of the drain pipe on the front side, the pipe can be used also as a pipe to reduce the construction cost a little and to maintain the appearance. Also, as shown in FIG. 6 as another embodiment of piping means for the rear side drain pipe 18, as shown in FIG.
If the drain pipe 18 'on the rear side is connected to the rear pipe and the cover 28 is provided in the recessed portion 27 formed in the rear side, it is possible to prevent the drain pipe 18' from colliding with an external obstacle, and at the appearance. Can hold the aesthetics of. Further, the drain pipe may be inserted in the handrail.

Next, FIG. 7 shows a state in which the front window 13 of the cab 10 in FIG. 4 is flipped up and rotated (moved to the lower side of the ceiling 21 manually in the direction of arrow a or by an electric motor (not shown)). It is a partial cutaway side view of the upper swing body 9. Next, FIG. 8 is a front view showing another embodiment front window 13 _a of the front window 13 in FIG. In the figure, 30 _a is _a window frame of the front window 13 _a , and 31 _U and 31 _L are sash type glass plates fitted into the window frame 30 _a . Further, FIG. 9 is a front view showing another example front window 13 _b . In the figure, 30 _b is a window frame of the front window 13 _b , 32 is a glass plate fitted in the window frame 30 _b , and 32 ′ is detachably attached to a hole 33 formed in the glass plate 32. It is a glass plate.

Next, the structure of the cab 10 which is equipped with the air conditioner of the present invention, and which is provided with the front window for accommodating it by flipping up and rotating it on the lower surface side of the ceiling 21 of the cab 10 will be described. The cab 10 according to the present invention is a cab in which the front window is moved and stored on the lower surface side of the ceiling 21 when the front window is opened, and the cooler unit 14 is formed by detachably forming the front window 13 shown in FIG. Adjusting air outlet 2
The passage of the air blown from 4 was opened. The above as another first embodiment the opening means of the air-air passage, as shown in FIG. 8, the front window 13 _a glass plate before windows 13
_A plurality of sash type glass plates 31 _L , 31 _U (the glass plate 31 _L can be moved in the direction of the arrow B) that can be moved in the window frame 30 _{a of a} are formed, and the above-mentioned glass plate 31 _L is opened to adjust air. The passage of the air blown from the air outlet 24 is opened. As another second embodiment opening means, FIG.
It was formed removably part of the windshield 13 _b lower part of the glass plate 32 'as shown in FIG. Thereby, the glass plate 32 '
By removing it, the passage of the air blown out from the adjusted air outlet 24 can be opened. Further, as another third embodiment opening means, although not shown, an adjustment air blower is applied to a fixed portion of the front window (a front window having a structure in which the front window 13 shown in FIG. 7 cannot be removed) other than the upper position of the stored state position. Another regulated air outlet leading from the outlet 24 was provided. Accordingly, even when the front window having a structure that cannot be removed is flipped up and stored on the lower surface side of the ceiling 21, the passage of the air blown out from the cooler unit 14 can be opened toward the driver.

[0017]

In the construction machine equipped with the cab of the present invention, the air conditioner can be installed on the upper surface of the cab ceiling so as to have a sense of unity with the cab without impairing the appearance. Further, since the air conditioner does not occupy a part of the cab indoor space, it is possible to effectively utilize the narrow living space in the cab room. Further, since the air blown out from the ceiling side is blown toward the driver, the driver can get the effect of head cold foot heat, and can perform effective and healthy air conditioning. Further, since the air conditioner is easily attached to the upper surface of the ceiling, so-called post-installed optional equipment can be easily and quickly installed. When the cab is not equipped with an air conditioner, a cover plate is attached to the above-mentioned window hole in the ceiling, and the window hole is closed. As a cab equipped with a device, its manufacturing cost can be reduced. Further, in the present invention, in order to discharge the drain drawn out from the cooler unit, the drain pipes are arranged in two directions, that is, the front side and the rear side of the cab. The pipe connected to the side uses the handrail for entrance and exit on the front left side of the cab in plan view, and the pipe connected to the rear side is installed near the corner on the right side of the rear of the cab in plan view. Therefore, when working the construction machine, the drain is discharged through the pipe on the front side when the machine leans to the front side or the left side, and the drain through the pipe on the rear side when the machine tilts to the rear side or the right side. Since the above handrail is used for a part of the piping on the front side, the piping can also be used to slightly reduce the piping construction cost, and the appearance can be maintained. In addition, drain pipes are installed in the recesses formed on the outer peripheral surface of the rear part of the cab, and a cover is provided in the recesses so that the drain pipes do not collide with external obstacles. In addition to being able to do so, it is possible to maintain an aesthetic appearance. Further, the cab according to the present invention is a cab in which the front window is moved and housed on the lower surface side of the ceiling when the front window is opened, and the front window is formed so as to be removable so that the air outlet of the cooler unit can be adjusted. The passage for the air blown from is opened. As another means for opening the passage of the blown air, the glass plate of the front window is formed into a plurality of sash type glass plates movable in the window frame of the front window, and the sash type glass plate is opened. I tried to operate it. Further, as another opening means of the second embodiment, at least a part of the glass plate of the front window is formed so as to be detachable, and the part of the glass plate is detachably operated. In addition, as another third embodiment opening means for the passage of the blown air, another adjusted air outlet communicating with the adjusted air outlet is provided at a fixed portion other than the upper position of the accommodation state position of the front window. Therefore, when the front window of the cab is open, the air blown out from the adjustment air outlet can be blown to the driver without any trouble.

[Brief description of drawings]

FIG. 1 is a side view of a small hydraulic excavator equipped with an air conditioner of the present invention.

2 is a plan view of the upper swing body of FIG. 1 viewed from A. FIG.

FIG. 3 is a plan view showing the upper swing body in a state in which the air conditioner is not equipped according to the present invention.

FIG. 4 is a side view of a partial cutaway main part of the upper swing body in FIG. 1.

FIG. 5 is a front view showing the cooler unit as viewed from B of FIG.

6 is a cross-sectional plan view of an essential part of a modified example of a C part in FIG.

FIG. 7 is a side view of a partial cutaway main part of the upper swing body in a state where the front window of the cab in FIG. 4 is flipped up and rotated.

8 is a front view showing a front window of another embodiment of the front window in FIG. 7. FIG.

FIG. 9 is a front view showing a front window of another embodiment of the present invention.

FIG. 10 is a schematic side view of an example cabin of the prior art.

[Explanation of symbols]

9 the upper rotating body 10, 10 'cab 12 handrail 13, 13 _a, 13 _b front window 14 cooler unit 15 capacitors 16 and 28 cover 17,18,18' drain pipe 21 roof 22 skylights 23 window hole 24 adjusted air outlet 27 recess 29 cover plate 30 _a, 30 _b window frame 31 _U, 31 _L, 32,32 'glass plate

Claims (15)

[Claims] 1. A cooler unit of an air conditioner for adjusting air inside a cab and a condenser for liquefying a gaseous refrigerant by forced cooling are integrally provided on an upper surface of a ceiling of the cab. A cab air conditioner. 2. The cooler unit and the condenser,
The air conditioner for a cab according to claim 1, wherein the air conditioner is provided on a rear side of a skylight formed in a front portion of a ceiling. 3. The air conditioner for a cab according to claim 1, wherein the cooler unit and the condenser are arranged to substantially fit within a range of a ceiling of the cab in a plan view. 4. The cab according to claim 1, wherein a window hole for opening the adjusted air outlet to the inside of the cab is opened at a position of a ceiling corresponding to the adjusted air outlet of the cooler unit. Air conditioner. 5. The air conditioner for a cab according to claim 4, wherein a cover plate that can close the window is detachably attached to the window when the air conditioner is not installed in the cab. . 6. The outer peripheral side extending from the cooler unit to the condenser is covered with a cover, and the cover is integrally fixed to the cab, and the cover is substantially contained within the cab ceiling in a plan view. The air conditioner for a cab according to claim 3, wherein the air conditioner is configured as described above. 7. The drain pipes are arranged in two directions, a front side and a rear side of the cab, in order to discharge the drain drawn out from the cooler unit.
Air conditioner for the listed cab. 8. A pipe-shaped handrail provided near the entrance of the cab and used by a driver to assist in getting on and off is used as a part of the drain pipe arranged in the front side of the cab. The air conditioner for a cab according to claim 7, which is characterized in that. 9. The air conditioner for a cab according to claim 7, wherein a drain pipe arranged in a front side of the cab is inserted in an upper hand rail. 10. The air conditioner for a cab according to claim 7, wherein the drain pipe arranged in the rearward direction of the cab is vertically piped along an outer peripheral surface portion of the rearward side of the cab. 11. A vertical recess is formed on an outer peripheral surface of a rear side of the cab, a drain pipe on the rear side is piped in the recess, and a cover is provided for the recessed pipe. The cab air-conditioning system according to claim 10. 12. A cab in which the front window is moved and stored on the lower surface side of the ceiling when the front window of the cab is opened, and the adjustment air outlet is formed by detachably forming the front window. The air conditioner for a cab according to claim 4, wherein a passage for air blown out from the air conditioner is opened. 13. A cab adapted to be moved and stored on a lower surface side of a front window ceiling of the cab when the front window of the cab is opened, wherein a plurality of glass plates of the front window can be moved within a window frame of the front window. 5. The air conditioner for a cab according to claim 4, wherein the sash type glass plate is formed so that the passage of the air blown out from the adjustment air outlet can be opened. 14. A cab in which the front window is moved and stored on the lower surface side of the ceiling when the front window of the cab is opened, and at least a part of the glass plate of the front window is detachable. The air conditioner for the cab according to claim 4, wherein the passage of the air blown from the adjusted air outlet is opened by doing so. 15. A cab adapted to move and store the front window on the lower surface side of the ceiling when the front window of the cab is open, the cab being fixed to a position other than the upper side of the storage state of the front window. The air conditioner for a cab according to claim 4, wherein another adjusted air outlet communicating with the adjusted air outlet is provided.