JPH11291750A - Air conditioner for industrial machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for an industrial machine providing fine clearness for a rear window or the like and also improved in in terior comfortableness by enhancing cooling performance. SOLUTION: An air suction port (for instance, inside air suction port 31, outside air suction port 32) for sucking air to a unit 20 of an air conditioner is provided behind a seat 15 of an operator cab 10, and an air blow port (for instance, foot blow port 41, vent blow port 42, defrost blow port 43) blowing conditioned air by the unit 20 of the air conditioner is provided so as to generate an air stream from the forward toward the rearward of the operator cab 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for an industrial machine, which is installed in the cab of an industrial machine such as a tractor and air-conditions the cab.

[0002]

2. Description of the Related Art Conventionally, as an air conditioner for controlling the temperature in the cab of an industrial machine such as a tractor, there is an air conditioner shown in FIGS.

In the air conditioner shown in FIG. 4, a unit 20A of the air conditioner is arranged in front of the cab 10, and the air in the cab 10 is sucked from the inside air inlet 31, and the air conditioned by the unit 20A is removed. Foot outlet 41,
The cab 1 from the vent outlet 42 and the defrost outlet 43
It blows out toward the back of 0.

[0004] This unit 20A is connected to an intake unit provided with a fan 21 for taking in and blowing air from the cab 10 and forming a part of a cooling cycle provided in an engine room or the like. It comprises a cooler unit provided with an evaporator 22 for cooling the air, and a heater unit provided with a heater core 23 for guiding hot water such as engine cooling water to adjust the temperature of the taken air.

However, in this apparatus, since the inside air suction port 31 and each of the air outlets 41, 42, 43 are located in the immediate vicinity, the air flow blown out from each of the air outlets 41, 42, 43 (in FIG. (Indicated by an arrow)
If the rear window 17 becomes cloudy due to the inside air suction port 31 being blown in before reaching the rear window 17, it is difficult to clear it.

In the air conditioner shown in FIG. 5, an air conditioner unit 20B is disposed at the upper part of the cab 10, an inside air inlet 31 is provided at the upper rear of the cab 10, and at the upper front of the cab 10. A vent outlet 42 and a defrost outlet 43 are provided.

This unit 20B is also provided with a fan 21 for blowing air, an evaporator 22 for cooling air, and a heater core 23 for heating air.

[0008] However, this device also has the inside air inlet 3
1 and the respective air outlets 41 and 42 are relatively close to each other, so that the air flow (indicated by an arrow in the drawing) blown out from the respective air outlets 42 and 43 is provided in the upper rear part of the cab 10. As a result, there is a problem that the rear window 17 has poor window clearness similarly to the air conditioner described above.

In the air conditioner shown in FIG. 6, an air conditioner unit 20C is arranged at a lower portion behind a seat 15 in a driver's cab 10, and an inside air inlet 3 is provided behind the seat 15 in the driver's cab 10.
The driver's cab 1 sends conditioned air to the vicinity from behind the driver.
A vent outlet 42 that blows out toward the front of the vehicle is provided.

In this unit 20C, the direction of the flow of the air sucked through the inside air suction port 31 and the direction of the flow of the air blown out from the vent outlet 42 are different from each other.
The air flow in 0 is relatively good.

In particular, as shown in FIG. 7, the duct of the unit 20C has a center duct 44 extending left and right below the seat of the cab 10, and a pair of left and right vents is provided at the left and right ends of the center duct 44. The ducts 45 rise up to the vicinity of the driver's elbow, and the vent outlet 42
Because it is established to blow air toward the front of 0, there are air blows on the left and right sides of the cab 10,
The air flow in the cab 10 is good.

However, in this device, since the vent outlet 42 is provided only near the elbow of the driver, the blown air flow (indicated by an arrow in the drawing) is directed only to the upper part of the cab 10. It does not flow around the driver's legs. For this reason, the temperature distribution in the driver's cab 10 varies, and there is still a problem in the comfort in the driver's cab 10.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art. The present invention improves the window clearness of a rear window and the like, and enhances the cooling performance to improve indoor comfort. It is an object of the present invention to provide an air conditioner for an industrial machine.

[0014]

In order to achieve the above object, according to the first aspect of the present invention, a seat is provided behind a driver's cab.
An air suction port for sucking air into the unit of the air conditioner is provided, and an air blower that blows air conditioned by the unit of the air conditioner so as to generate an airflow from the front to the rear of the cab. An outlet is provided.

With this configuration, the air sucked from the air suction port provided behind the seat in the driver's cab is air-conditioned by the air conditioner, and is blown out of the air outlet into the driver's cab. Creates an airflow from the front to the rear, so that air does not stay behind the driver's cab seat,
Window clearness can be improved.

According to a second aspect of the present invention, the air outlet is provided in front of a seat in the cab, and directs air conditioned by a unit of the air conditioner toward the rear of the cab. It is characterized by blowing out.

According to this structure, the air sucked from the air suction port provided behind the seat in the driver's cab is air-conditioned by the air conditioner, and is supplied from the air outlet provided in front of the seat in the driver's cab. It blows out toward the back of the cab,
An airflow from the front to the rear of the cab can be more reliably generated.

According to the third aspect of the present invention, the air outlet is provided behind and below a seat in the cab, and air conditioned by a unit of the air conditioner is provided in front of the cab. It is characterized by blowing out.

With this arrangement, the air sucked from the air inlet provided behind the seat in the driver's cab is air-conditioned by the air conditioner, and the air blower provided behind and below the seat in the driver's cab is provided. It is blown out from the exit toward the front of the driver's cab and is guided from the front of the driver's cab to the rear along the inner wall of the driver's cab. Therefore, the temperature distribution in the cab is uniform, and the comfort in the cab can be improved.

According to a fourth aspect of the present invention, the air suction port comprises an outside air suction port for sucking air outside the vehicle compartment, and an inside air suction port for sucking air inside the vehicle compartment. A mode switching door for switching intake of inside and outside air is provided in an intake duct through which air from the air is guided.

In this way, in the outside air mode,
Not only air is sucked in from the outside air suction port, but also a little air is sucked in from the inside air suction port, and even in the outside air mode, an airflow from the front of the cab to the rear is generated. No air stagnation,
Clearness of windows such as rear windows is further improved.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of an air conditioner for an industrial machine according to a first embodiment of the present invention. Members common to those shown in FIGS. Omitted.

As shown in FIG. 1, a cab 10 of an industrial machine such as a tractor mainly has a floor panel 11, a back panel 12, a front panel 13 and a ceiling panel 14, and a seat 15 is provided on the floor panel 11. Installed.

In front of the cab 10, a front window 16 attached to a front panel 13 is provided.
A rear window 17 attached to the rear panel 12 is provided at the rear.

Below the seat 15, an air conditioner unit 20 including a fan 21, an evaporator 22, and a heater core 23 is installed.

In this unit 20, an intake duct 30 for introducing outside air from an outside air intake port 32 through an outside air duct 33 and an inside air from an inside air intake port 31 are provided. Is provided with a mode switching door 34 for switching between the inside and outside air intake modes.

However, the mode switching door 34 almost completely closes the outside air duct 33 and opens only the air passage from the inside air suction port 31, the outside air mode position where the outside air duct 33 is opened, and the inside air mode position. And an intermediate mode position for introducing both the outside air and the outside air.

Downstream of the unit 20, an air distribution duct 40 that distributes air heated by the heater core 23 and air-conditioned to a predetermined temperature toward the front of the cab 10 extends along the floor panel 11. The front end portion of the air distribution duct 40 is provided so as to stand up along the front panel 13.

A foot outlet 41 for blowing air toward the driver's feet from the bottom in order from the bottom, and a blower air for blowing toward the upper body of the driver. A defrost outlet 43 for blowing air toward the inner surface of the vent window 42, the front window 16 or the side window (not shown).

Next, the operation will be described. First, when performing the cooling operation, the mode switching door 34 is set to the inside air mode position. In this case, the air sucked into the unit 20 from the inside air suction port 31 through the air intake duct 30 is cooled and dehumidified by the evaporator 22, and the cold air is heated through the heater core 23 to be adjusted to a predetermined temperature. Is done.

The conditioned air is blown from the foot outlet 41, the vent outlet 42, and the defrost outlet 43 toward the rear of the cab 10, as indicated by the arrow in the figure.

At this time, the inside air suction port 3 which is the air suction port
1 is located behind the operator's cab 10, and the foot outlet 41, the vent outlet 42, and the defrost outlet 43, which are air outlets, are located in front of the operator's cab 10. An airflow is generated from the rearward.

As a result, the air does not stay in a part of the cab 10 and the air flows through the entire cab 10, so that the entire cab 10 is air-conditioned to a predetermined temperature and the front window 16 and the side Fogging does not occur not only in the window but also in the rear window 17, and the window clearness can be improved.

In the heating operation, the mode switching door 34 is set to the outside air mode position. In this case, outside air is guided to the intake duct 30 from the outside air suction port 32 to the unit 20 via the outside air duct 33. In addition,
Depending on the case, the mode switching door 34 may be set at the intermediate position. In this case, the air in the cab 10 is slightly sucked from the inside air suction port 31.

Also in this mode, the evaporator 22
The air cooled and dehumidified is heated through the heater core 23 and adjusted to a predetermined temperature. In order to increase the heating efficiency, the compressor may be stopped and the evaporator 22 may be set to the inoperative state.

In the heating mode, similarly to the cooling mode, an airflow from the front to the rear of the cab 10 is generated, and the entire cab 10 is air-conditioned to a predetermined temperature, and the front window 16 and the side The window clearness of the rear window 17 as well as the window can be improved.

In particular, when the mode switching door 34 is set at the intermediate position, the air in the cab also flows from the front to the rear, so that the air flows behind the seat in the cab due to this airflow. This eliminates the problem, and further improves the window clearness of the rear window and the like.

Next, an air conditioner for an industrial machine according to a second embodiment of the present invention will be described with reference to FIG.
2 shows an air conditioner for an industrial machine according to a second embodiment of the present invention. FIG. 2 is a side view, FIG. 3 is a front view of an air distribution duct, and FIG. The same reference numerals are given to the common members, and the description is omitted.

In the second embodiment, as shown in FIG. 2, an inside air suction port 31 communicating with an intake duct 30 for taking air into the unit 20 of the air conditioner is provided behind the cab 10. .

As shown in FIG. 3, the air distribution duct 40 connected to the downstream side of the heater unit includes a center duct 44 extending left and right below the seat 15 and left and right ends of the center duct 44. A pair of left and right vent ducts 45, 45 rising from the vicinity of the driver's elbow.
And

The air distribution duct 40 includes a center duct 4
4, a foot outlet 41 for blowing air from behind toward the driver's feet is provided, and an upper portion of each vent duct 45 for blowing air from behind toward the upper body of the driver. A vent outlet 42 is provided.

In this air conditioner, the air sucked into the unit 20 from the inside air suction port 31 through the air intake duct 30 passes through the evaporator 22 and the heater core 23 and is adjusted to a predetermined temperature. The air is blown from the vent outlet 42 toward the front of the cab 10.

At this time, the inside air suction port 3 which is the air suction port
1 is located behind the operator's cab 10 and the foot outlet 41 and the vent outlet 42, which are air outlets, open toward the front of the operator cab 10, so that the air temperature-controlled by the unit 20 is: Along the inner wall of the cab 10,
Flowing backward through the front of the cab 10 (FIG. 2)
Medium, indicated by arrows).

As a result, the air does not stay behind the seat 15 in the driver's cab 10 and the window clearness of the rear window 17 and the like can be improved.

Since the air is blown out from the foot outlet 41 toward the driver's feet, the air does not stay around the legs, and the temperature distribution in the cab 10 is made more uniform. This improves the cooling performance and the comfort of the driver's cab.

In the second embodiment, only the inside air suction port 31 is shown as an air suction port. However, an outside air suction port 32 as shown in FIG. May be switched.

The embodiments described above have been described in order to facilitate understanding of the present invention, but are not described to limit the present invention. Therefore, each element disclosed in each of the above embodiments is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0048]

As described above, according to the first aspect of the present invention, the air suction port is provided behind the seat in the cab, and the air blowout port controls the airflow from the front to the rear of the cab. Since it is provided at the position where the airflow is generated, air does not stay near the rear window due to the airflow from the front of the driver's cab to the rear of the driver's cab.

According to the second aspect of the present invention, since the air outlet for blowing air toward the rear of the cab is provided in front of the seat in the cab, the air outlet in front of the cab is provided. Thus, an airflow from the airbag toward the air suction port behind the driver's cab can be more reliably generated, and the window clearness of the rear window is improved.

According to the third aspect of the present invention, the air outlet for blowing air toward the front of the driver's cab is provided behind and below the seat in the driver's cab, and is blown out from the air outlet. Since the conditioned air flows from the front of the cab to the rear along the inner wall of the cab, air may flow from the front of the cab to the rear of the cab, causing air to stay near the rear window. Since it disappears, the window clearness of the rear window and the like is improved.

Since the conditioned air is blown out from the air outlet provided below the seat in the driver's cab toward the driver's feet, there is no stagnation around the driver's legs, and the cooling performance is improved. And the temperature distribution in the cabin becomes uniform, and the comfort in the cab can be improved.

According to the fourth aspect of the invention, in the outside air mode, not only air is sucked from the outside air suction port, but also a small amount of air is sucked from the inside air suction port. An airflow is generated from the front to the rear of the room, and the air does not stay near the rear window, so that the rear window can be more clearly cleaned.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a side view of a second embodiment of the present invention.

FIG. 3 is a front view of an air distribution duct of the second embodiment.

FIG. 4 is a side view showing an example of a conventional air conditioner for an industrial machine.

FIG. 5 is a side view showing another example of the conventional air conditioner for an industrial machine.

FIG. 6 is a side view showing another example of the conventional air conditioner for an industrial machine.

FIG. 7 is a front view of an air distribution duct of another example.

[Explanation of symbols]

 10: cab, 15: seat, 16: front window, 17: rear window, 20: unit of air conditioner, 30: intake duct, 31: inside air suction port, 32: outside air suction port, 34: mode switching door, 40: air distribution duct, 41: foot outlet, 42: vent outlet, 43: defrost outlet.

Claims (4)

[Claims] An air inlet for sucking air into a unit (20) of an air conditioner is provided behind a seat (15) of a cab (10), and is provided from the front to the back of the cab (10). An air conditioner for an industrial machine, comprising an air outlet for blowing air conditioned by the air conditioner unit (20) so as to generate an airflow toward the air conditioner. 2. The cab (10)
The air conditioner provided at the front of the seat (15) of the air conditioner and blowing air conditioned by the unit (20) of the air conditioner toward the rear of the cab (10). Air conditioner for industrial machinery. 3. The cab (10)
The seat (15) is provided behind and below, and blows air conditioned by the unit (20) of the air conditioner toward the front of the cab (10). An air conditioner for an industrial machine as described in the above. 4. The air suction port comprises an outside air suction port (32) for sucking air outside the vehicle compartment, and an inside air suction port (31) for sucking air inside the vehicle compartment. (31, 32) into which the intake duct (3
The air conditioner for an industrial machine according to any one of claims 1 to 3, wherein a mode switching door (34) for switching intake of inside air or outside air is provided in 0).